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Thome T, Vugman NA, Stone LE, Wimberly K, Scali ST, Ryan TE. A tryptophan-derived uremic metabolite-Ahr-Pdk4 axis governs skeletal muscle mitochondrial energetics in chronic kidney disease. JCI Insight 2024:e178372. [PMID: 38652558 DOI: 10.1172/jci.insight.178372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024] Open
Abstract
Chronic kidney disease (CKD) causes an accumulation of uremic metabolites that negatively impact skeletal muscle function. Tryptophan-derived uremic metabolites are agonists of the aryl hydrocarbon receptor (AHR) which has been shown to be activated in the blood of CKD patients. This study investigated the role of the AHR in skeletal muscle pathology of CKD. Compared to control participants with normal kidney function, AHR-dependent gene expression (CYP1A1 and CYP1B1) was significantly upregulated in skeletal muscle of patients with CKD (P=0.032) and the magnitude of AHR activation was inversely correlated with mitochondrial respiration (P<0.001). In mice with CKD, muscle mitochondrial oxidative phosphorylation (OXPHOS) was significantly impaired and strongly correlated with both the serum level of tryptophan-derived uremic metabolites and AHR activation. Muscle-specific deletion of the AHR significantly improved mitochondrial OXPHOS in male mice with the greatest uremic toxicity (CKD+probenecid) and abolished the relationship between uremic metabolites and OXPHOS. The uremic metabolite-AHR-mitochondrial axis in skeletal muscle was further confirmed using muscle-specific AHR knockdown in C57BL6J that harbour a high-affinity AHR allele, as well as ectopic viral expression of constitutively active mutant AHR in mice with normal renal function. Notably, OXPHOS changes in AHRmKO mice were only present when mitochondria were fueled by carbohydrates. Further analyses revealed that AHR activation in mice led to significant increases in Pdk4 expression (P<0.05) and phosphorylation of pyruvate dehydrogenase enzyme (P<0.05). These findings establish a uremic metabolite-AHR-Pdk4 axis in skeletal muscle that governs mitochondrial deficits in carbohydrate oxidation during CKD.
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Affiliation(s)
- Trace Thome
- Applied Physiology and Kinesiology, University of Florida, Gainesville, United States of America
| | - Nicholas A Vugman
- Applied Physiology and Kinesiology, University of Florida, Gainesville, United States of America
| | - Lauren E Stone
- Applied Physiology and Kinesiology, University of Florida, Gainesville, United States of America
| | - Keon Wimberly
- Applied Physiology and Kinesiology, University of Florida, Gainesville, United States of America
| | - Salvatore T Scali
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, United States of America
| | - Terence E Ryan
- Applied Physiology and Kinesiology, University of Florida, Gainesville, United States of America
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Kim K, Fazzone B, Cort TA, Kunz EM, Alvarez S, Moerschel J, Palzkill VR, Dong G, Anderson EM, O'Malley KA, Berceli SA, Ryan TE, Scali ST. Mitochondrial targeted catalase improves muscle strength following arteriovenous fistula creation in mice with chronic kidney disease. Sci Rep 2024; 14:8288. [PMID: 38594299 PMCID: PMC11004135 DOI: 10.1038/s41598-024-58805-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 04/03/2024] [Indexed: 04/11/2024] Open
Abstract
Hand dysfunction is a common observation after arteriovenous fistula (AVF) creation for hemodialysis access and has a variable clinical phenotype; however, the underlying mechanism responsible is unclear. Grip strength changes are a common metric used to assess AVF-associated hand disability but has previously been found to poorly correlate with the hemodynamic perturbations post-AVF placement implicating other tissue-level factors as drivers of hand outcomes. In this study, we sought to test if expression of a mitochondrial targeted catalase (mCAT) in skeletal muscle could reduce AVF-related limb dysfunction in mice with chronic kidney disease (CKD). Male and female C57BL/6J mice were fed an adenine-supplemented diet to induce CKD prior to placement of an AVF in the iliac vascular bundle. Adeno-associated virus was used to drive expression of either a green fluorescent protein (control) or mCAT using the muscle-specific human skeletal actin (HSA) gene promoter prior to AVF creation. As expected, the muscle-specific AAV-HSA-mCAT treatment did not impact blood urea nitrogen levels (P = 0.72), body weight (P = 0.84), or central hemodynamics including infrarenal aorta and inferior vena cava diameters (P > 0.18) or velocities (P > 0.38). Hindlimb perfusion recovery and muscle capillary densities were also unaffected by AAV-HSA-mCAT treatment. In contrast to muscle mass and myofiber size which were not different between groups, both absolute and specific muscle contractile forces measured via a nerve-mediated in-situ preparation were significantly greater in AAV-HSA-mCAT treated mice (P = 0.0012 and P = 0.0002). Morphological analysis of the post-synaptic neuromuscular junction uncovered greater acetylcholine receptor cluster areas (P = 0.0094) and lower fragmentation (P = 0.0010) in AAV-HSA-mCAT treated mice. Muscle mitochondrial oxidative phosphorylation was not different between groups, but AAV-HSA-mCAT treated mice had lower succinate-fueled mitochondrial hydrogen peroxide emission compared to AAV-HSA-GFP mice (P < 0.001). In summary, muscle-specific scavenging of mitochondrial hydrogen peroxide significantly improves neuromotor function in mice with CKD following AVF creation.
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Affiliation(s)
- Kyoungrae Kim
- Department of Applied Physiology and Kinesiology, University of Florida, 1864 Stadium Rd, Gainesville, FL, 32611, USA
| | - Brian Fazzone
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, P.O. Box 100128, Gainesville, FL, 32610, USA
- Malcom Randall Veteran Affairs Medical Center, Gainesville, FL, USA
| | - Tomas A Cort
- Department of Applied Physiology and Kinesiology, University of Florida, 1864 Stadium Rd, Gainesville, FL, 32611, USA
| | - Eric M Kunz
- Department of Applied Physiology and Kinesiology, University of Florida, 1864 Stadium Rd, Gainesville, FL, 32611, USA
| | - Samuel Alvarez
- Department of Applied Physiology and Kinesiology, University of Florida, 1864 Stadium Rd, Gainesville, FL, 32611, USA
| | - Jack Moerschel
- Department of Applied Physiology and Kinesiology, University of Florida, 1864 Stadium Rd, Gainesville, FL, 32611, USA
| | - Victoria R Palzkill
- Department of Applied Physiology and Kinesiology, University of Florida, 1864 Stadium Rd, Gainesville, FL, 32611, USA
| | - Gengfu Dong
- Department of Applied Physiology and Kinesiology, University of Florida, 1864 Stadium Rd, Gainesville, FL, 32611, USA
| | - Erik M Anderson
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, P.O. Box 100128, Gainesville, FL, 32610, USA
- Malcom Randall Veteran Affairs Medical Center, Gainesville, FL, USA
| | - Kerri A O'Malley
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, P.O. Box 100128, Gainesville, FL, 32610, USA
- Malcom Randall Veteran Affairs Medical Center, Gainesville, FL, USA
| | - Scott A Berceli
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, P.O. Box 100128, Gainesville, FL, 32610, USA
- Malcom Randall Veteran Affairs Medical Center, Gainesville, FL, USA
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, 1864 Stadium Rd, Gainesville, FL, 32611, USA.
- Center for Exercise Science, University of Florida, Gainesville, FL, USA.
| | - Salvatore T Scali
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, P.O. Box 100128, Gainesville, FL, 32610, USA.
- Malcom Randall Veteran Affairs Medical Center, Gainesville, FL, USA.
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Fitzgerald LF, Lackey J, Moussa A, Shah SV, Castellanos AM, Khan S, Schonk M, Thome T, Salyers ZR, Jakkidi N, Kim K, Yang Q, Hepple RT, Ryan TE. Chronic aryl hydrocarbon receptor activity impairs muscle mitochondrial function with tobacco smoking. J Cachexia Sarcopenia Muscle 2024; 15:646-659. [PMID: 38333944 PMCID: PMC10995249 DOI: 10.1002/jcsm.13439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 11/21/2023] [Accepted: 01/14/2024] [Indexed: 02/10/2024] Open
Abstract
BACKGROUND Accumulating evidence has demonstrated that chronic tobacco smoking directly contributes to skeletal muscle dysfunction independent of its pathological impact to the cardiorespiratory systems. The mechanisms underlying tobacco smoke toxicity in skeletal muscle are not fully resolved. In this study, the role of the aryl hydrocarbon receptor (AHR), a transcription factor known to be activated with tobacco smoke, was investigated. METHODS AHR related gene (mRNA) expression was quantified in skeletal muscle from adult controls and patients with chronic obstructive pulmonary disease (COPD), as well as mice with and without cigarette smoke exposure. Utilizing both skeletal muscle-specific AHR knockout mice exposed to chronic repeated (5 days per week for 16 weeks) cigarette smoke and skeletal muscle-specific expression of a constitutively active mutant AHR in healthy mice, a battery of assessments interrogating muscle size, contractile function, mitochondrial energetics, and RNA sequencing were employed. RESULTS Skeletal muscle from COPD patients (N = 79, age = 67.0 ± 8.4 years) had higher levels of AHR (P = 0.0451) and CYP1B1 (P < 0.0001) compared to healthy adult controls (N = 16, age = 66.5 ± 6.5 years). Mice exposed to cigarette smoke displayed higher expression of Ahr (P = 0.008), Cyp1b1 (P < 0.0001), and Cyp1a1 (P < 0.0001) in skeletal muscle compared to air controls. Cigarette smoke exposure was found to impair skeletal muscle mitochondrial oxidative phosphorylation by ~50% in littermate controls (Treatment effect, P < 0.001), which was attenuated by deletion of the AHR in muscle in male (P = 0.001), but not female, mice (P = 0.37), indicating there are sex-dependent pathological effects of smoking-induced AHR activation in skeletal muscle. Viral mediated expression of a constitutively active mutant AHR in the muscle of healthy mice recapitulated the effects of cigarette smoking by decreasing muscle mitochondrial oxidative phosphorylation by ~40% (P = 0.003). CONCLUSIONS These findings provide evidence linking chronic AHR activation secondary to cigarette smoke exposure to skeletal muscle bioenergetic deficits in male, but not female, mice. AHR activation is a likely contributor to the decline in muscle oxidative capacity observed in smokers and AHR antagonism may provide a therapeutic avenue aimed to improve muscle function in COPD.
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Affiliation(s)
| | - Jacob Lackey
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Ahmad Moussa
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Sohan V. Shah
- Department of Physical TherapyUniversity of FloridaGainesvilleFLUSA
| | - Ana Maria Castellanos
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Shawn Khan
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Martin Schonk
- Department of Physical TherapyUniversity of FloridaGainesvilleFLUSA
| | - Trace Thome
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Zachary R. Salyers
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Nishka Jakkidi
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Kyoungrae Kim
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Qingping Yang
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Russell T. Hepple
- Department of Physical TherapyUniversity of FloridaGainesvilleFLUSA
- Myology InstituteUniversity of FloridaGainesvilleFLUSA
| | - Terence E. Ryan
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
- Myology InstituteUniversity of FloridaGainesvilleFLUSA
- Center for Exercise Science, University of FloridaGainesvilleFLUSA
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Palzkill VR, Tan J, Tice AL, Ferriera LF, Ryan TE. A 6-minute Limb Function Assessment for Therapeutic Testing in Experimental Peripheral Artery Disease Models. bioRxiv 2024:2024.03.21.586197. [PMID: 38585832 PMCID: PMC10996543 DOI: 10.1101/2024.03.21.586197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
Background The translation of promising therapies from pre-clinical models of hindlimb ischemia (HLI) to patients with peripheral artery disease (PAD) has been inadequate. While this failure is multifactorial, primary outcome measures in preclinical HLI models and clinical trials involving patients with PAD are not aligned well. For example, laser Doppler perfusion recovery measured under resting conditions is the most used outcome in HLI studies, whereas clinical trials involving patients with PAD primarily assess walking performance. Here, we sought to develop a 6-min limb function test for preclinical HLI models that assess muscular performance and hemodynamics congruently. Methods We developed an in situ 6-min limb function test that involves repeated isotonic (shortening) contractions performed against a submaximal load. Continuous measurement of muscle blood flow was performed using laser Doppler flowmetry. Quantification of muscle power, work, and perfusion are obtained across the test. To assess the efficacy of this test, we performed HLI via femoral artery ligation on several mouse strains: C57BL6J, BALBc/J, and MCK-PGC1α (muscle-specific overexpression of PGC1α). Additional experiments were performed using an exercise intervention (voluntary wheel running) following HLI. Results The 6-min limb function test was successful at detecting differences in limb function of C57BL6/J and BALBc/J mice subjected to HLI with effect sizes superior to laser Doppler perfusion recovery. C57BL6/J mice randomized to exercise therapy following HLI had smaller decline in muscle power, greater hyperemia, and performed more work across the 6-min limb function test compared to non-exercise controls with HLI. Mice with muscle-specific overexpression of PGC1α had no differences in perfusion recovery in resting conditions, but exhibited greater capillary density, increased muscle mass and absolute force levels, and performed more work across the 6-min limb function test compared to their wildtype littermates without the transgene. Conclusion These results demonstrate the efficacy of the 6-min limb function test to detect differences in the response to HLI across several interventions including where traditional perfusion recovery, capillary density, and muscle strength measures were unable to detect therapeutic differences.
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Affiliation(s)
- Victoria R. Palzkill
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
| | - Jianna Tan
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
| | | | - Leonardo F. Ferriera
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
- Center for Exercise Science, The University of Florida, Gainesville, FL, USA
- The Myology Institute, The University of Florida, Gainesville, FL, USA
- Department of Orthopaedic Surgery, Duke University School of Medicine, Durham, NC, USA
| | - Terence E. Ryan
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
- Center for Exercise Science, The University of Florida, Gainesville, FL, USA
- The Myology Institute, The University of Florida, Gainesville, FL, USA
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Ryan TE, Torres MJ, Lin CT, Clark AH, Brophy PM, Smith CA, Smith CD, Morris EM, Thyfault JP, Neufer PD. High-dose atorvastatin therapy progressively decreases skeletal muscle mitochondrial respiratory capacity in humans. JCI Insight 2024; 9:e174125. [PMID: 38385748 DOI: 10.1172/jci.insight.174125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 01/09/2024] [Indexed: 02/23/2024] Open
Abstract
BACKGROUNDWhile the benefits of statin therapy on atherosclerotic cardiovascular disease are clear, patients often experience mild to moderate skeletal myopathic symptoms, the mechanism for which is unknown. This study investigated the potential effect of high-dose atorvastatin therapy on skeletal muscle mitochondrial function and whole-body aerobic capacity in humans.METHODSEight overweight (BMI, 31.9 ± 2.0) but otherwise healthy sedentary adults (4 females, 4 males) were studied before (day 0) and 14, 28, and 56 days after initiating atorvastatin (80 mg/d) therapy.RESULTSMaximal ADP-stimulated respiration, measured in permeabilized fiber bundles from muscle biopsies taken at each time point, declined gradually over the course of atorvastatin treatment, resulting in > 30% loss of skeletal muscle mitochondrial oxidative phosphorylation capacity by day 56. Indices of in vivo muscle oxidative capacity (via near-infrared spectroscopy) decreased by 23% to 45%. In whole muscle homogenates from day 0 biopsies, atorvastatin inhibited complex III activity at midmicromolar concentrations, whereas complex IV activity was inhibited at low nanomolar concentrations.CONCLUSIONThese findings demonstrate that high-dose atorvastatin treatment elicits a striking progressive decline in skeletal muscle mitochondrial respiratory capacity, highlighting the need for longer-term dose-response studies in different patient populations to thoroughly define the effect of statin therapy on skeletal muscle health.FUNDINGNIH R01 AR071263.
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Affiliation(s)
- Terence E Ryan
- East Carolina Diabetes and Obesity Institute and
- Department of Physiology, Brody School of Medicine Greenville, North Carolina, USA
| | - Maria J Torres
- East Carolina Diabetes and Obesity Institute and
- Department of Kinesiology, East Carolina University, Greenville, North Carolina, USA
| | - Chien-Te Lin
- East Carolina Diabetes and Obesity Institute and
- Department of Physiology, Brody School of Medicine Greenville, North Carolina, USA
| | | | | | - Cheryl A Smith
- East Carolina Diabetes and Obesity Institute and
- Department of Physiology, Brody School of Medicine Greenville, North Carolina, USA
| | - Cody D Smith
- East Carolina Diabetes and Obesity Institute and
- Department of Physiology, Brody School of Medicine Greenville, North Carolina, USA
| | | | - John P Thyfault
- Cell Biology and Physiology and
- Kansas University Diabetes Institute and Department of Internal Medicine, Division of Endocrinology, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - P Darrell Neufer
- East Carolina Diabetes and Obesity Institute and
- Department of Physiology, Brody School of Medicine Greenville, North Carolina, USA
- Department of Biochemistry and Molecular Biology, Brody School of Medicine, Greenville, North Carolina, USA
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Murray KO, Brant JO, Spradlin RA, Thome T, Laitano O, Ryan TE, Riva A, Kladde MP, Clanton TL. Exertional heat stroke causes long-term skeletal muscle epigenetic reprogramming, altered gene expression, and impaired satellite cell function in mice. Am J Physiol Regul Integr Comp Physiol 2024; 326:R160-R175. [PMID: 38047316 DOI: 10.1152/ajpregu.00226.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 11/26/2023] [Accepted: 11/26/2023] [Indexed: 12/05/2023]
Abstract
The effect of exertional heat stroke (EHS) exposure on skeletal muscles is incompletely understood. Muscle weakness is an early symptom of EHS but is not considered a major target of multiorgan injury. Previously, in a preclinical mouse model of EHS, we observed the vulnerability of limb muscles to a second EHS exposure, suggesting hidden processes contributing to declines in muscle resilience. Here, we evaluated the possible molecular origins of EHS-induced declines in muscle resilience. Female C57BL/6 mice [total n = 56; 28/condition, i.e., EHS and exercise control (EXC)] underwent forced wheel running at 37.5°C/40% relative humidity until symptom limitation (unconsciousness). EXC mice exercised identically at room temperature (22-23°C). After 1 mo of recovery, the following were assessed: 1) specific force and caffeine-induced contracture in soleus (SOL) and extensor digitorum longus (EDL) muscles; 2) transcriptome and DNA methylome responses in gastrocnemius (GAST); and 3) primary satellite cell function (proliferation and differentiation). There were no differences in specific force in either SOL or EDL from EXC. Only EHS solei exhibited lower caffeine sensitivity. EHS GAST exhibited higher RNA expression of genes encoding structural proteins of slow fibers, heat shock proteins, and myogenesis. A total of ∼2,500 differentially methylated regions of DNA that could potentially affect many cell functions were identified. Primary satellite cells exhibited suppressed proliferation rates but normal differentiation responses. Results demonstrate long-term changes in skeletal muscles 1 mo after EHS that could contribute to declines in muscle resilience. Skeletal muscle may join other, more recognized tissues considered vulnerable to long-term effects of EHS.NEW & NOTEWORTHY Exertional heat stroke (EHS) in mice induces long-term molecular and functional changes in limb muscle that could reflect a loss of "resilience" to further stress. The phenotype was characterized by altered caffeine sensitivity and suppressed satellite cell proliferative potential. This was accompanied by changes in gene expression and DNA methylation consistent with ongoing muscle remodeling and stress adaptation. We propose that EHS may induce a prolonged vulnerability of skeletal muscle to further stress or injury.
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Affiliation(s)
- Kevin O Murray
- Department of Applied Physiology and Kinesiology, College of Health and Human Performance, University of Florida, Gainesville, Florida, United States
| | - Jason O Brant
- Department of Biostatistics, University of Florida, Gainesville, Florida, United States
- University of Florida Health Cancer Center, University of Florida, Gainesville, Florida, United States
| | - Ray A Spradlin
- Department of Applied Physiology and Kinesiology, College of Health and Human Performance, University of Florida, Gainesville, Florida, United States
| | - Trace Thome
- Department of Applied Physiology and Kinesiology, College of Health and Human Performance, University of Florida, Gainesville, Florida, United States
| | - Orlando Laitano
- Department of Applied Physiology and Kinesiology, College of Health and Human Performance, University of Florida, Gainesville, Florida, United States
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, College of Health and Human Performance, University of Florida, Gainesville, Florida, United States
| | - Alberto Riva
- University of Florida Health Cancer Center, University of Florida, Gainesville, Florida, United States
- Interdisciplinary Center for Biotechnology Research, University of Florida, Gainesville, Florida, United States
| | - Michael P Kladde
- Department of Biochemistry and Molecular Biology, College of Medicine, University of Florida, Gainesville, Florida, United States
- University of Florida Health Cancer Center, University of Florida, Gainesville, Florida, United States
| | - Thomas L Clanton
- Department of Applied Physiology and Kinesiology, College of Health and Human Performance, University of Florida, Gainesville, Florida, United States
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Hetherington-Rauth M, Johnson E, Migliavacca E, Parimi N, Langsetmo L, Hepple RT, Grzywinski Y, Corthesy J, Ryan TE, Ferrucci L, Feige JN, Orwoll ES, Cawthon PM. Nutrient Metabolites Associated With Low D3Cr Muscle Mass, Strength, and Physical Performance in Older Men. J Gerontol A Biol Sci Med Sci 2024; 79:glad217. [PMID: 37694554 PMCID: PMC10809040 DOI: 10.1093/gerona/glad217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Indexed: 09/12/2023] Open
Abstract
BACKGROUND The relationship between amino acids, B vitamins, and their metabolites with D3-creatine (D3Cr) dilution muscle mass, a more direct measure of skeletal muscle mass, has not been investigated. We aimed to assess associations of plasma metabolites with D3Cr muscle mass, as well as muscle strength and physical performance in older men from the Osteoporotic Fractures in Men cohort study. METHODS Out of 1 425 men (84.2 ± 4.1 years), men with the lowest D3Cr muscle mass (n = 100), slowest walking speed (n = 100), lowest grip strength (n = 100), and a random sample (n = 200) serving as a comparison group to the low groups were included. Metabolites were analyzed using liquid chromatography-tandem mass spectrometry. Metabolite differences between the low groups and random sample and their relationships with the muscle outcomes adjusted for confounders and multiple comparisons were assessed using t-test/Mann-Whitney-Wilcoxon and partial correlations, respectively. RESULTS For D3Cr muscle mass, significant biomarkers (p < .001) with ≥10% fold difference and largest partial correlations were tryptophan (Trp; r = 0.31), kynurenine (Kyn)/Trp; r = -0.27), nicotinamide (Nam)/quinolinic acid (Quin; r = 0.21), and alpha-hydroxy-5-methyl-tetrahydrofolate (hm-THF; r = -0.25). For walking speed, hm-THF, Nam/Quin, and Quin had the largest significance and fold difference, whereas valine (r = 0.17), Trp (r = 0.17), HKyn/Xant (r = -0.20), neopterin (r = -0.17), 5-methyl-THF (r = -0.20), methylated folate (r = -0.21), and thiamine (r = -0.18) had the strongest correlations. Only hm-THF was correlated with grip strength (r = -0.21) and differed between the low group and the random sample. CONCLUSIONS Future interventions focusing on how the Trp metabolic pathway or hm-THF influences D3Cr muscle mass and physical performance declines in older adults are warranted.
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Affiliation(s)
| | - Eileen Johnson
- California Pacific Medical Center, Research Institute, San Francisco, California, USA
| | | | - Neeta Parimi
- California Pacific Medical Center, Research Institute, San Francisco, California, USA
| | - Lisa Langsetmo
- Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, Minnesota, USA
| | - Russell T Hepple
- Department of Physical Therapy, University of Florida, Gainesville, Florida, USA
| | - Yohan Grzywinski
- Nestlé Institute of Food Safety & Analytical Sciences, Nestlé Research, Lausanne, Switzerland
| | - John Corthesy
- Nestlé Institute of Food Safety & Analytical Sciences, Nestlé Research, Lausanne, Switzerland
| | - Terence E Ryan
- Department of Applied Physiology & Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Luigi Ferrucci
- National Institute on Aging, National Institutes of Health, Gaithersburg, Maryland, USA
| | - Jérôme N Feige
- Nestlé Institute of Health Sciences, Nestlé Research, Lausanne, Switzerland
- School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Eric S Orwoll
- Oregon Health and Science University, Portland, Oregon, USA
| | - Peggy M Cawthon
- California Pacific Medical Center, Research Institute, San Francisco, California, USA
- University of California, Department of Epidemiology and Biostatistics, San Francisco, California, USA
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8
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Palzkill VR, Tan J, Yang Q, Morcos J, Laitano O, Ryan TE. Deletion of the aryl hydrocarbon receptor in endothelial cells improves ischemic angiogenesis in chronic kidney disease. Am J Physiol Heart Circ Physiol 2024; 326:H44-H60. [PMID: 37921663 DOI: 10.1152/ajpheart.00530.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 10/30/2023] [Indexed: 11/04/2023]
Abstract
Chronic kidney disease (CKD) is a strong risk factor for peripheral artery disease (PAD) that is associated with worsened clinical outcomes. CKD leads to the accumulation of tryptophan metabolites that are associated with adverse limb events in PAD and are ligands of the aryl hydrocarbon receptor (AHR), which may regulate ischemic angiogenesis. To test if endothelial cell-specific deletion of the AHR (AHRecKO) alters ischemic angiogenesis and limb function in mice with CKD subjected to femoral artery ligation. Male AHRecKO mice with CKD displayed better limb perfusion recovery and enhanced ischemic angiogenesis compared with wild-type mice with CKD. However, the improved limb perfusion did not result in better muscle performance. In contrast to male mice, deletion of the AHR in female mice with CKD had no impact on perfusion recovery or angiogenesis. With the use of primary endothelial cells from male and female mice, treatment with indoxyl sulfate uncovered sex-dependent differences in AHR activating potential and RNA sequencing revealed wide-ranging sex differences in angiogenic signaling pathways. Endothelium-specific deletion of the AHR improved ischemic angiogenesis in male, but not female, mice with CKD. There are sex-dependent differences in Ahr activating potential within endothelial cells that are independent of sex hormones.NEW & NOTEWORTHY This study provides novel insights into the mechanisms by which chronic kidney disease worsens ischemic limb outcomes in an experimental model of peripheral artery disease. Deletion of the aryl hydrocarbon receptor (AHR) in the endothelium improved ischemic angiogenesis suggesting that AHR inhibition could be a viable therapeutic target; however, this effect was only observed in male mice. Subsequent analysis in primary endothelial cells reveals sex differences in Ahr activating potential independent of sex hormones.
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Affiliation(s)
- Victoria R Palzkill
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States
| | - Jianna Tan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States
| | - Qingping Yang
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States
| | - Juliana Morcos
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States
| | - Orlando Laitano
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States
- Center for Exercise Science, University of Florida, Gainesville, Florida, United States
- The Myology Institute, University of Florida, Gainesville, Florida, United States
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States
- Center for Exercise Science, University of Florida, Gainesville, Florida, United States
- The Myology Institute, University of Florida, Gainesville, Florida, United States
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9
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Pass CG, Palzkill V, Tan J, Kim K, Thome T, Yang Q, Fazzone B, Robinson ST, O’Malley KA, Yue F, Scali ST, Berceli SA, Ryan TE. Single-Nuclei RNA-Sequencing of the Gastrocnemius Muscle in Peripheral Artery Disease. Circ Res 2023; 133:791-809. [PMID: 37823262 PMCID: PMC10599805 DOI: 10.1161/circresaha.123.323161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 09/22/2023] [Accepted: 09/26/2023] [Indexed: 10/13/2023]
Abstract
BACKGROUND Lower extremity peripheral artery disease (PAD) is a growing epidemic with limited effective treatment options. Here, we provide a single-nuclei atlas of PAD limb muscle to facilitate a better understanding of the composition of cells and transcriptional differences that comprise the diseased limb muscle. METHODS We obtained gastrocnemius muscle specimens from 20 patients with PAD and 12 non-PAD controls. Nuclei were isolated and single-nuclei RNA-sequencing was performed. The composition of nuclei was characterized by iterative clustering via principal component analysis, differential expression analysis, and the use of known marker genes. Bioinformatics analysis was performed to determine differences in gene expression between PAD and non-PAD nuclei, as well as subsequent analysis of intercellular signaling networks. Additional histological analyses of muscle specimens accompany the single-nuclei RNA-sequencing atlas. RESULTS Single-nuclei RNA-sequencing analysis indicated a fiber type shift with patients with PAD having fewer type I (slow/oxidative) and more type II (fast/glycolytic) myonuclei compared with non-PAD, which was confirmed using immunostaining of muscle specimens. Myonuclei from PAD displayed global upregulation of genes involved in stress response, autophagy, hypoxia, and atrophy. Subclustering of myonuclei also identified populations that were unique to PAD muscle characterized by metabolic dysregulation. PAD muscles also displayed unique transcriptional profiles and increased diversity of transcriptomes in muscle stem cells, regenerating myonuclei, and fibro-adipogenic progenitor cells. Analysis of intercellular communication networks revealed fibro-adipogenic progenitors as a major signaling hub in PAD muscle, as well as deficiencies in angiogenic and bone morphogenetic protein signaling which may contribute to poor limb function in PAD. CONCLUSIONS This reference single-nuclei RNA-sequencing atlas provides a comprehensive analysis of the cell composition, transcriptional signature, and intercellular communication pathways that are altered in the PAD condition.
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Affiliation(s)
- Caroline G. Pass
- Department of Applied Physiology and Kinesiology (C.G.P., V.P., J.T., K.K., T.T., Q.Y., T.E.R.), The University of Florida, Gainesville
| | - Victoria Palzkill
- Department of Applied Physiology and Kinesiology (C.G.P., V.P., J.T., K.K., T.T., Q.Y., T.E.R.), The University of Florida, Gainesville
| | - Jianna Tan
- Department of Applied Physiology and Kinesiology (C.G.P., V.P., J.T., K.K., T.T., Q.Y., T.E.R.), The University of Florida, Gainesville
| | - Kyoungrae Kim
- Department of Applied Physiology and Kinesiology (C.G.P., V.P., J.T., K.K., T.T., Q.Y., T.E.R.), The University of Florida, Gainesville
| | - Trace Thome
- Department of Applied Physiology and Kinesiology (C.G.P., V.P., J.T., K.K., T.T., Q.Y., T.E.R.), The University of Florida, Gainesville
| | - Qingping Yang
- Department of Applied Physiology and Kinesiology (C.G.P., V.P., J.T., K.K., T.T., Q.Y., T.E.R.), The University of Florida, Gainesville
| | - Brian Fazzone
- Department of Surgery, Division of Vascular Surgery and Endovascular Therapy (B.F., S.T.R., K.A.O., S.T.S., S.A.B.), The University of Florida, Gainesville
- Malcom Randall VA Medical Center, Gainesville, FL (B.F., S.T.R., K.A.O., S.T.S., S.A.B.)
| | - Scott T. Robinson
- Department of Surgery, Division of Vascular Surgery and Endovascular Therapy (B.F., S.T.R., K.A.O., S.T.S., S.A.B.), The University of Florida, Gainesville
- Malcom Randall VA Medical Center, Gainesville, FL (B.F., S.T.R., K.A.O., S.T.S., S.A.B.)
| | - Kerri A. O’Malley
- Department of Surgery, Division of Vascular Surgery and Endovascular Therapy (B.F., S.T.R., K.A.O., S.T.S., S.A.B.), The University of Florida, Gainesville
- Malcom Randall VA Medical Center, Gainesville, FL (B.F., S.T.R., K.A.O., S.T.S., S.A.B.)
| | - Feng Yue
- Department of Animal Sciences (F.Y.), The University of Florida, Gainesville
- Myology Institute (F.Y., T.E.R.), The University of Florida, Gainesville
| | - Salvatore T. Scali
- Department of Surgery, Division of Vascular Surgery and Endovascular Therapy (B.F., S.T.R., K.A.O., S.T.S., S.A.B.), The University of Florida, Gainesville
- Malcom Randall VA Medical Center, Gainesville, FL (B.F., S.T.R., K.A.O., S.T.S., S.A.B.)
| | - Scott A. Berceli
- Department of Surgery, Division of Vascular Surgery and Endovascular Therapy (B.F., S.T.R., K.A.O., S.T.S., S.A.B.), The University of Florida, Gainesville
- Malcom Randall VA Medical Center, Gainesville, FL (B.F., S.T.R., K.A.O., S.T.S., S.A.B.)
| | - Terence E. Ryan
- Department of Applied Physiology and Kinesiology (C.G.P., V.P., J.T., K.K., T.T., Q.Y., T.E.R.), The University of Florida, Gainesville
- Center for Exercise Science (T.E.R.), The University of Florida, Gainesville
- Myology Institute (F.Y., T.E.R.), The University of Florida, Gainesville
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10
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Khattri RB, Louis LZ, Kim K, Anderson EM, Fazzone B, Harland KC, Hu Q, O'Malley KA, Berceli SA, Wymer J, Ryan TE, Scali ST. Temporal serum metabolomic and lipidomic analyses distinguish patients with access-related hand disability following arteriovenous fistula creation. Sci Rep 2023; 13:16811. [PMID: 37798334 PMCID: PMC10555997 DOI: 10.1038/s41598-023-43664-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Accepted: 09/27/2023] [Indexed: 10/07/2023] Open
Abstract
For end-stage kidney disease (ESKD) patients, hemodialysis requires durable vascular access which is often surgically created using an arteriovenous fistula (AVF). However, some ESKD patients that undergo AVF placement develop access-related hand dysfunction (ARHD) through unknown mechanisms. In this study, we sought to determine if changes in the serum metabolome could distinguish ESKD patients that develop ARHD from those that have normal hand function following AVF creation. Forty-five ESKD patients that underwent first-time AVF creation were included in this study. Blood samples were obtained pre-operatively and 6-weeks post-operatively and metabolites were extracted and analyzed using nuclear magnetic resonance spectroscopy. Patients underwent thorough examination of hand function at both timepoints using the following assessments: grip strength manometry, dexterity, sensation, motor and sensory nerve conduction testing, hemodynamics, and the Disabilities of the Arm, Shoulder, and Hand (DASH) questionnaire. Nineteen of the forty-five patients displayed overt weakness using grip strength manometry (P < 0.0001). Unfortunately, the serum metabolome was indistinguishable between patients with and without weakness following AVF surgery. However, a significant correlation was found between the change in tryptophan levels and the change in grip strength suggesting a possible role of tryptophan-derived uremic metabolites in post-AVF hand-associated weakness. Compared to grip strength, changes in dexterity and sensation were smaller than those observed in grip strength, however, post-operative decreases in phenylalanine, glycine, and alanine were unique to patients that developed signs of motor or sensory disability following AVF creation.
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Affiliation(s)
- Ram B Khattri
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, 32611, USA
| | - Lauryn Z Louis
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, 32611, USA
| | - Kyoungrae Kim
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, 32611, USA
| | - Erik M Anderson
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, FL, 32611, USA
- Malcom Randall Veteran Affairs Medical Center, Gainesville, FL, USA
| | - Brian Fazzone
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, FL, 32611, USA
- Malcom Randall Veteran Affairs Medical Center, Gainesville, FL, USA
| | - Kenneth C Harland
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, FL, 32611, USA
- Malcom Randall Veteran Affairs Medical Center, Gainesville, FL, USA
| | - Qiongyao Hu
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, FL, 32611, USA
- Malcom Randall Veteran Affairs Medical Center, Gainesville, FL, USA
| | - Kerri A O'Malley
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, FL, 32611, USA
- Malcom Randall Veteran Affairs Medical Center, Gainesville, FL, USA
| | - Scott A Berceli
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, FL, 32611, USA
- Malcom Randall Veteran Affairs Medical Center, Gainesville, FL, USA
| | - James Wymer
- Department of Neurology, University of Florida, Gainesville, FL, 32611, USA
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, 32611, USA
- Center for Exercise Science, University of Florida, Gainesville, FL, 32611, USA
| | - Salvatore T Scali
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, FL, 32611, USA.
- Malcom Randall Veteran Affairs Medical Center, Gainesville, FL, USA.
- , Gainesville, USA.
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11
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Kim K, Cort TA, Kunz EM, Moerschel J, Palzkill VR, Dong G, Moparthy CN, Anderson EM, Fazzone B, O'Malley KA, Robinson ST, Berceli SA, Ryan TE, Scali ST. N-acetylcysteine treatment attenuates hemodialysis access-related limb pathophysiology in mice with chronic kidney disease. Am J Physiol Renal Physiol 2023; 325:F271-F282. [PMID: 37439200 PMCID: PMC10511162 DOI: 10.1152/ajprenal.00083.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 06/20/2023] [Accepted: 07/05/2023] [Indexed: 07/14/2023] Open
Abstract
The objective of the present study was to determine if treatment with N-acetylcysteine (NAC) could reduce access-related limb dysfunction in mice. Male and female C57BL6J mice were fed an adenine-supplemented diet to induce chronic kidney disease (CKD) prior to the surgical creation of an arteriovenous fistula (AVF) in the iliac vascular bundle. AVF creation significantly increased peak aortic and infrarenal vena cava blood flow velocities, but NAC treatment had no significant impact, indicating that fistula maturation was not impacted by NAC treatment. Hindlimb muscle and paw perfusion recovery and muscle capillary density in the AVF limb were unaffected by NAC treatment. However, NAC treatment significantly increased the mass of the tibialis anterior (P = 0.0120) and soleus (P = 0.0452) muscles post-AVF. There was a significant main effect of NAC treatment on hindlimb grip strength at postoperative day 12 (POD 12) (P = 0.0003), driven by significantly higher grip strength in both male (P = 0.0273) and female (P = 0.0031) mice treated with NAC. There was also a significant main effect of NAC treatment on the walking speed at postoperative day 12 (P = 0.0447), and post hoc testing revealed an improvement in NAC-treated male mice (P = 0.0091). The area of postsynaptic acetylcholine receptors (P = 0.0263) and motor endplates (P = 0.0240) was also increased by NAC treatment. Interestingly, hindlimb skeletal muscle mitochondrial oxidative phosphorylation trended higher in NAC-treated female mice but was not statistically significant (P = 0.0973). Muscle glutathione levels and redox status were not significantly impacted by NAC treatment in either sex. In summary, NAC treatment attenuated some aspects of neuromotor pathology in mice with chronic kidney disease following AVF creation.NEW & NOTEWORTHY Hemodialysis via autogenous arteriovenous fistula (AVF) is the preferred first-line modality for renal replacement therapy in patients with end-stage kidney disease. However, patients undergoing AVF surgery frequently experience a spectrum of hand disability symptoms postsurgery including weakness and neuromotor dysfunction. Unfortunately, no treatment is currently available to prevent or mitigate these symptoms. Here, we provide evidence that daily N-acetylcysteine supplementation can attenuate some aspects of limb neuromotor function in a preclinical mouse model of AVF.
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Affiliation(s)
- Kyoungrae Kim
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States
| | - Tomas A Cort
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States
| | - Eric M Kunz
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States
| | - Jack Moerschel
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States
| | - Victoria R Palzkill
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States
| | - Gengfu Dong
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States
| | - Chatick N Moparthy
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States
| | - Erik M Anderson
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Florida, United States
- Malcom Randall Veteran Affairs Medical Center, University of Florida, Gainesville, Florida, United States
| | - Brian Fazzone
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Florida, United States
- Malcom Randall Veteran Affairs Medical Center, University of Florida, Gainesville, Florida, United States
| | - Kerri A O'Malley
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Florida, United States
- Malcom Randall Veteran Affairs Medical Center, University of Florida, Gainesville, Florida, United States
| | - Scott T Robinson
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Florida, United States
- Malcom Randall Veteran Affairs Medical Center, University of Florida, Gainesville, Florida, United States
| | - Scott A Berceli
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Florida, United States
- Malcom Randall Veteran Affairs Medical Center, University of Florida, Gainesville, Florida, United States
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States
- Center for Exercise Science, University of Florida, Gainesville, Florida, United States
| | - Salvatore T Scali
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Florida, United States
- Malcom Randall Veteran Affairs Medical Center, University of Florida, Gainesville, Florida, United States
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12
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Palzkill VR, Tan J, Yang Q, Morcos J, Laitano O, Ryan TE. Activation of the Aryl Hydrocarbon Receptor in Endothelial Cells Impairs Ischemic Angiogenesis in Chronic Kidney Disease. bioRxiv 2023:2023.07.24.550410. [PMID: 37546909 PMCID: PMC10401998 DOI: 10.1101/2023.07.24.550410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
Rationale Chronic kidney disease (CKD) is a strong risk factor for peripheral artery disease (PAD) that is associated with worsened clinical outcomes. CKD leads to accumulation of tryptophan metabolites that associate with adverse limb events in PAD and are ligands of the aryl hydrocarbon receptor (AHR) which may regulate ischemic angiogenesis. Objectives To test if endothelial cell-specific deletion of the AHR (AHRecKO) alters ischemic angiogenesis and limb function in mice with CKD subjected to femoral artery ligation. Findings Male AHRecKO mice with CKD displayed better limb perfusion recovery and enhanced ischemic angiogenesis compared to wildtype mice with CKD. However, the improved limb perfusion did not result in better muscle performance. In contrast to male mice, deletion of the AHR in female mice with CKD had no impact on perfusion recovery or angiogenesis. Using primary endothelial cells from male and female mice, treatment with indoxyl sulfate uncovered sex-dependent differences in AHR activating potential and RNA sequencing revealed wide ranging sex-differences in angiogenic signaling pathways. Conclusion Endothelium-specific deletion of the AHR improved ischemic angiogenesis in male, but not female, mice with CKD. There are sex-dependent differences in Ahr activating potential within endothelial cells that are independent of sex hormones.
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Affiliation(s)
- Victoria R. Palzkill
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
| | - Jianna Tan
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
| | - Qingping Yang
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
| | - Juliana Morcos
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
| | - Orlando Laitano
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
- Center for Exercise Science, The University of Florida, Gainesville, FL, USA
- The Myology Institute, The University of Florida, Gainesville, FL, USA
| | - Terence E. Ryan
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
- Center for Exercise Science, The University of Florida, Gainesville, FL, USA
- The Myology Institute, The University of Florida, Gainesville, FL, USA
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13
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Balestrieri N, Palzkill V, Pass C, Tan J, Salyers ZR, Moparthy C, Murillo A, Kim K, Thome T, Yang Q, O’Malley KA, Berceli SA, Yue F, Scali ST, Ferreira LF, Ryan TE. Activation of the Aryl Hydrocarbon Receptor in Muscle Exacerbates Ischemic Pathology in Chronic Kidney Disease. Circ Res 2023; 133:158-176. [PMID: 37325935 PMCID: PMC10330629 DOI: 10.1161/circresaha.123.322875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 06/07/2023] [Indexed: 06/17/2023]
Abstract
BACKGROUND Chronic kidney disease (CKD) accelerates the development of atherosclerosis, decreases muscle function, and increases the risk of amputation or death in patients with peripheral artery disease (PAD). However, the mechanisms underlying this pathobiology are ill-defined. Recent work has indicated that tryptophan-derived uremic solutes, which are ligands for AHR (aryl hydrocarbon receptor), are associated with limb amputation in PAD. Herein, we examined the role of AHR activation in the myopathy of PAD and CKD. METHODS AHR-related gene expression was evaluated in skeletal muscle obtained from mice and human PAD patients with and without CKD. AHRmKO (skeletal muscle-specific AHR knockout) mice with and without CKD were subjected to femoral artery ligation, and a battery of assessments were performed to evaluate vascular, muscle, and mitochondrial health. Single-nuclei RNA sequencing was performed to explore intercellular communication. Expression of the constitutively active AHR was used to isolate the role of AHR in mice without CKD. RESULTS PAD patients and mice with CKD displayed significantly higher mRNA expression of classical AHR-dependent genes (Cyp1a1, Cyp1b1, and Aldh3a1) when compared with either muscle from the PAD condition with normal renal function (P<0.05 for all 3 genes) or nonischemic controls. AHRmKO significantly improved limb perfusion recovery and arteriogenesis, preserved vasculogenic paracrine signaling from myofibers, increased muscle mass and strength, as well as enhanced mitochondrial function in an experimental model of PAD/CKD. Moreover, viral-mediated skeletal muscle-specific expression of a constitutively active AHR in mice with normal kidney function exacerbated the ischemic myopathy evidenced by smaller muscle masses, reduced contractile function, histopathology, altered vasculogenic signaling, and lower mitochondrial respiratory function. CONCLUSIONS These findings establish AHR activation in muscle as a pivotal regulator of the ischemic limb pathology in CKD. Further, the totality of the results provides support for testing of clinical interventions that diminish AHR signaling in these conditions.
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Affiliation(s)
- Nicholas Balestrieri
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
| | - Victoria Palzkill
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
| | - Caroline Pass
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
| | - Jianna Tan
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
| | - Zachary R. Salyers
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
| | - Chatick Moparthy
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
| | - Ania Murillo
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
| | - Kyoungrae Kim
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
| | - Trace Thome
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
| | - Qingping Yang
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
| | - Kerri A. O’Malley
- Department of Surgery, The University of Florida, Gainesville, FL, USA
| | - Scott A. Berceli
- Department of Surgery, The University of Florida, Gainesville, FL, USA
| | - Feng Yue
- Department of Animal Sciences, The University of Florida, Gainesville, FL, USA
- Myology Institute, The University of Florida, Gainesville, FL, USA
| | | | - Leonardo F. Ferreira
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
- Center for Exercise Science, The University of Florida, Gainesville, FL, USA
- Myology Institute, The University of Florida, Gainesville, FL, USA
| | - Terence E. Ryan
- Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, FL, USA
- Center for Exercise Science, The University of Florida, Gainesville, FL, USA
- Myology Institute, The University of Florida, Gainesville, FL, USA
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14
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Dong G, Moparthy C, Thome T, Kim K, Yue F, Ryan TE. IGF-1 Therapy Improves Muscle Size and Function in Experimental Peripheral Arterial Disease. JACC Basic Transl Sci 2023; 8:702-719. [PMID: 37426532 PMCID: PMC10322901 DOI: 10.1016/j.jacbts.2022.12.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 12/16/2022] [Accepted: 12/19/2022] [Indexed: 03/11/2023]
Abstract
Lower-extremity peripheral arterial disease (PAD) has increased in prevalence, yet therapeutic development has remained stagnant. Skeletal muscle health and function has been strongly linked to quality of life and medical outcomes in patients with PAD. Using a rodent model of PAD, this study demonstrates that treatment of the ischemic limb with insulin-like growth factor (IGF)-1 significantly increases muscle size and strength without improving limb hemodynamics. Interestingly, the effect size of IGF1 therapy was larger in female mice than in male mice, highlighting the need to carefully examine sex-dependent effects in experimental PAD therapies.
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Affiliation(s)
- Gengfu Dong
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Chatick Moparthy
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Trace Thome
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Kyoungrae Kim
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Feng Yue
- Department of Animal Sciences, University of Florida, Gainesville, Florida, USA
- Myology Institute, University of Florida, Gainesville, Florida, USA
| | - Terence E. Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
- Center for Exercise Science, University of Florida, Gainesville, Florida, USA
- Myology Institute, University of Florida, Gainesville, Florida, USA
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15
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Cheng HS, Pérez-Cremades D, Zhuang R, Jamaiyar A, Wu W, Chen J, Tzani A, Stone L, Plutzky J, Ryan TE, Goodney PP, Creager MA, Sabatine MS, Bonaca MP, Feinberg MW. Impaired angiogenesis in diabetic critical limb ischemia is mediated by a miR-130b/INHBA signaling axis. JCI Insight 2023; 8:e163041. [PMID: 37097749 PMCID: PMC10322685 DOI: 10.1172/jci.insight.163041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 04/18/2023] [Indexed: 04/26/2023] Open
Abstract
Patients with peripheral artery disease (PAD) and diabetes compose a high-risk population for development of critical limb ischemia (CLI) and amputation, although the underlying mechanisms remain poorly understood. Comparison of dysregulated microRNAs from diabetic patients with PAD and diabetic mice with limb ischemia revealed the conserved microRNA, miR-130b-3p. In vitro angiogenic assays demonstrated that miR-130b rapidly promoted proliferation, migration, and sprouting in endothelial cells (ECs), whereas miR-130b inhibition exerted antiangiogenic effects. Local delivery of miR-130b mimics into ischemic muscles of diabetic mice (db/db) following femoral artery ligation (FAL) promoted revascularization by increasing angiogenesis and markedly improved limb necrosis and amputation. RNA-Seq and gene set enrichment analysis from miR-130b-overexpressing ECs revealed the BMP/TGF-β signaling pathway as one of the top dysregulated pathways. Accordingly, overlapping downregulated transcripts from RNA-Seq and miRNA prediction algorithms identified that miR-130b directly targeted and repressed the TGF-β superfamily member inhibin-β-A (INHBA). miR-130b overexpression or siRNA-mediated knockdown of INHBA induced IL-8 expression, a potent angiogenic chemokine. Lastly, ectopic delivery of silencer RNAs (siRNA) targeting Inhba in db/db ischemic muscles following FAL improved revascularization and limb necrosis, recapitulating the phenotype of miR-130b delivery. Taken together, a miR-130b/INHBA signaling axis may provide therapeutic targets for patients with PAD and diabetes at risk of developing CLI.
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Affiliation(s)
- Henry S Cheng
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Daniel Pérez-Cremades
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Department of Physiology, University of Valencia, and INCLIVA Biomedical Research Institute, Valencia, Spain
| | - Rulin Zhuang
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Department of Cardiothoracic Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Medical School of Nanjing University, Nanjing, China
| | - Anurag Jamaiyar
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Winona Wu
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Jingshu Chen
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Aspasia Tzani
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Lauren Stone
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Jorge Plutzky
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Philip P Goodney
- Heart and Vascular Center, Dartmouth-Hitchcock Medical Center and Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire, USA
| | - Mark A Creager
- Heart and Vascular Center, Dartmouth-Hitchcock Medical Center and Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire, USA
| | - Marc S Sabatine
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Marc P Bonaca
- CPC Clinical Research, University of Colorado, Denver, Colorado, USA
| | - Mark W Feinberg
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
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16
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Balestrieri N, Palzkill V, Pass C, Tan J, Salyers ZR, Moparthy C, Murillo A, Kim K, Thome T, Yang Q, O'Malley KA, Berceli SA, Yue F, Scali ST, Ferreira LF, Ryan TE. Chronic activation of the aryl hydrocarbon receptor in muscle exacerbates ischemic pathology in chronic kidney disease. bioRxiv 2023:2023.05.16.541060. [PMID: 37292677 PMCID: PMC10245783 DOI: 10.1101/2023.05.16.541060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Chronic kidney disease (CKD) accelerates the development of atherosclerosis, decreases muscle function, and increases the risk of amputation or death in patients with peripheral artery disease (PAD). However, the cellular and physiological mechanisms underlying this pathobiology are ill-defined. Recent work has indicated that tryptophan-derived uremic toxins, many of which are ligands for the aryl hydrocarbon receptor (AHR), are associated with adverse limb outcomes in PAD. We hypothesized that chronic AHR activation, driven by the accumulation of tryptophan-derived uremic metabolites, may mediate the myopathic condition in the presence of CKD and PAD. Both PAD patients with CKD and mice with CKD subjected to femoral artery ligation (FAL) displayed significantly higher mRNA expression of classical AHR-dependent genes ( Cyp1a1 , Cyp1b1 , and Aldh3a1 ) when compared to either muscle from the PAD condition with normal renal function ( P <0.05 for all three genes) or non-ischemic controls. Skeletal-muscle-specific AHR deletion in mice (AHR mKO ) significantly improved limb muscle perfusion recovery and arteriogenesis, preserved vasculogenic paracrine signaling from myofibers, increased muscle mass and contractile function, as well as enhanced mitochondrial oxidative phosphorylation and respiratory capacity in an experimental model of PAD/CKD. Moreover, viral-mediated skeletal muscle-specific expression of a constitutively active AHR in mice with normal kidney function exacerbated the ischemic myopathy evidenced by smaller muscle masses, reduced contractile function, histopathology, altered vasculogenic signaling, and lower mitochondrial respiratory function. These findings establish chronic AHR activation in muscle as a pivotal regulator of the ischemic limb pathology in PAD. Further, the totality of the results provide support for testing of clinical interventions that diminish AHR signaling in these conditions.
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Khattri RB, Batra A, Matheny M, Hart C, Henley-Beasley SC, Hammers D, Zeng H, White Z, Ryan TE, Barton E, Pascal B, Walter GA. Magnetic resonance quantification of skeletal muscle lipid infiltration in a humanized mouse model of Duchenne muscular dystrophy. NMR Biomed 2023; 36:e4869. [PMID: 36331178 PMCID: PMC10308798 DOI: 10.1002/nbm.4869] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 10/28/2022] [Accepted: 11/02/2022] [Indexed: 06/16/2023]
Abstract
Rodent models of Duchenne muscular dystrophy (DMD) often do not recapitulate the severity of muscle wasting and resultant fibro-fatty infiltration observed in DMD patients. Having recently documented severe muscle wasting and fatty deposition in two preclinical models of muscular dystrophy (Dysferlin-null and mdx mice) through apolipoprotein E (ApoE) gene deletion without and with cholesterol-, triglyceride-rich Western diet supplementation, we sought to determine whether magnetic resonance imaging and spectroscopy (MRI and MRS, respectively) could be used to detect, characterize, and compare lipid deposition in mdx-ApoE knockout with mdx mice in a diet-dependent manner. MRI revealed that both mdx and mdx-ApoE mice exhibited elevated proton relaxation time constants (T2 ) in their lower hindlimbs irrespective of diet, indicating both chronic muscle damage and fatty tissue deposition. The mdx-ApoE mice on a Western diet (mdx-ApoEW ) presented with greatest fatty tissue infiltration in the posterior compartment of the hindlimb compared with other groups, as detected by MRI/MRS. High-resolution magic angle spinning confirmed elevated lipid deposition in the posterior compartments of mdx-ApoEW mice in vivo and ex vivo, respectively. In conclusion, the mdx-ApoEW model recapitulates some of the extreme fatty tissue deposition observed clinically in DMD muscle but typically absent in mdx mice. This preclinical model will help facilitate the development of new imaging modalities directly relevant to the image contrast generated in DMD, and help to refine MR-based biomarkers and their relationship to tissue structure and disease progression.
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Affiliation(s)
- Ram B. Khattri
- Department of Physiology and Functional Genomics, University of Florida, Gainesville, FL, USA
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Abhinandan Batra
- Department of Physiology and Functional Genomics, University of Florida, Gainesville, FL, USA
| | - Michael Matheny
- Department of Pharmacology & Therapeutics, University of Florida, Gainesville, FL, USA
| | - Cora Hart
- Department of Pharmacology & Therapeutics, University of Florida, Gainesville, FL, USA
| | | | - David Hammers
- Department of Pharmacology & Therapeutics, University of Florida, Gainesville, FL, USA
| | - Huadong Zeng
- Advanced Magnetic Resonance Imaging and Spectroscopy Facility, University of Florida, Gainesville, FL, USA
| | - Zoe White
- Department of Anesthesiology, Pharmacology & Therapeutics, University of British Columbia, Canada
| | - Terence E. Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
- Center of Exercise Science, University of Florida, Gainesville, FL, United States
| | - Elisabeth Barton
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Bernatchez Pascal
- Department of Anesthesiology, Pharmacology & Therapeutics, University of British Columbia, Canada
| | - Glenn A. Walter
- Department of Physiology and Functional Genomics, University of Florida, Gainesville, FL, USA
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Thome T, Kim K, Dong G, Ryan TE. The Role of Mitochondrial and Redox Alterations in the Skeletal Myopathy Associated with Chronic Kidney Disease. Antioxid Redox Signal 2023; 38:318-337. [PMID: 36245209 PMCID: PMC9986033 DOI: 10.1089/ars.2022.0143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 09/28/2022] [Accepted: 10/01/2022] [Indexed: 11/12/2022]
Abstract
Significance: An estimated 700 million people globally suffer from chronic kidney disease (CKD). In addition to increasing cardiovascular disease risk, CKD is a catabolic disease that results in a loss of muscle mass and function, which are strongly associated with mortality and a reduced quality of life. Despite the importance of muscle health and function, there are no treatments available to prevent or attenuate the myopathy associated with CKD. Recent Advances: Recent studies have begun to unravel the changes in mitochondrial and redox homeostasis within skeletal muscle during CKD. Impairments in mitochondrial metabolism, characterized by reduced oxidative phosphorylation, are found in both rodents and patients with CKD. Associated with aberrant mitochondrial function, clinical and preclinical findings have documented signs of oxidative stress, although the molecular source and species are ill-defined. Critical Issues: First, we review the pathobiology of CKD and its associated myopathy, and we review muscle cell bioenergetics and redox biology. Second, we discuss evidence from clinical and preclinical studies that have implicated the involvement of mitochondrial and redox alterations in CKD-associated myopathy and review the underlying mechanisms reported. Third, we discuss gaps in knowledge related to mitochondrial and redox alterations on muscle health and function in CKD. Future Directions: Despite what has been learned, effective treatments to improve muscle health in CKD remain elusive. Further studies are needed to uncover the complex mitochondrial and redox alterations, including post-transcriptional protein alterations, in patients with CKD and how these changes interact with known or unknown catabolic pathways contributing to poor muscle health and function. Antioxid. Redox Signal. 38, 318-337.
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Affiliation(s)
- Trace Thome
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Kyoungrae Kim
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Gengfu Dong
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Terence E. Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
- Center for Exercise Science, University of Florida, Gainesville, Florida, USA
- Myology Institute, University of Florida, Gainesville, Florida, USA
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19
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Kumar RA, Hahn D, Kelley RC, Muscato DR, Shamoun A, Curbelo-Bermudez N, Butler WG, Yegorova S, Ryan TE, Ferreira LF. Skeletal muscle Nox4 knockout prevents and Nox2 knockout blunts loss of maximal diaphragm force in mice with heart failure with reduced ejection fraction. Free Radic Biol Med 2023; 194:23-32. [PMID: 36436728 PMCID: PMC10191720 DOI: 10.1016/j.freeradbiomed.2022.11.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/14/2022] [Accepted: 11/14/2022] [Indexed: 11/27/2022]
Abstract
Patients with heart failure with reduced ejection fraction (HFrEF) experience diaphragm weakness that contributes to the primary disease symptoms of fatigue, dyspnea, and exercise intolerance. Weakness in the diaphragm is related to excessive production of reactive oxygen species (ROS), but the exact source of ROS remains unknown. NAD(P)H Oxidases (Nox), particularly the Nox2 and 4 isoforms, are important sources of ROS within skeletal muscle that contribute to optimal cell function. There are reports of increased Nox activity in the diaphragm of patients and animal models of HFrEF, implicating these complexes as possible sources of diaphragm dysfunction in HFrEF. To investigate the role of these proteins on diaphragm weakness in HFrEF, we generated inducible skeletal muscle specific knockouts of Nox2 or Nox4 using the Cre-Lox system and assessed diaphragm function in a mouse model of HFrEF induced by myocardial infarction. Diaphragm maximal specific force measured in vitro was depressed by ∼20% with HFrEF. Skeletal muscle knockout of Nox4 provided full protection against the loss of maximal force (p < 0.01), while the knockout of Nox2 provided partial protection (7% depression, p < 0.01). Knockout of Nox2 from skeletal myofibers improved survival from 50 to 80% following myocardial infarction (p = 0.026). Our findings show an important role for skeletal muscle NAD(P)H Oxidases contributing to loss of diaphragm maximal force in HFrEF, along with systemic pathophysiological responses following myocardial infarction.
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Affiliation(s)
- Ravi A Kumar
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA; King's College London British Heart Foundation Centre of Excellence, School of Cardiovascular Medicine & Sciences, London, United Kingdom
| | - Dongwoo Hahn
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA; Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN, USA
| | - Rachel C Kelley
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA; Endocrine Society, Washington, D.C, USA
| | - Derek R Muscato
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Alex Shamoun
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Nuria Curbelo-Bermudez
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - W Greyson Butler
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Svetlana Yegorova
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Leonardo F Ferreira
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA.
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Khattri RB, Puglise J, Ryan TE, Walter GA, Merritt ME, Barton ER. Isolated murine skeletal muscles utilize pyruvate over glucose for oxidation. Metabolomics 2022; 18:105. [PMID: 36480060 PMCID: PMC9732067 DOI: 10.1007/s11306-022-01948-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 10/29/2022] [Indexed: 12/13/2022]
Abstract
INTRODUCTION Fuel sources for skeletal muscle tissue include carbohydrates and fatty acids, and utilization depends upon fiber type, workload, and substrate availability. The use of isotopically labeled substrate tracers combined with nuclear magnetic resonance (NMR) enables a deeper examination of not only utilization of substrates by a given tissue, but also their contribution to tricarboxylic acid (TCA) cycle intermediates. OBJECTIVES The goal of this study was to determine the differential utilization of substrates in isolated murine skeletal muscle, and to evaluate how isopotomer anlaysis provided insight into skeletal muscle metabolism. METHODS Isolated C57BL/6 mouse hind limb muscles were incubated in oxygenated solution containing uniformly labeled 13C6 glucose, 13C3 pyruvate, or 13C2 acetate at room temperature. Isotopomer analysis of 13C labeled glutamate was performed on pooled extracts of isolated soleus and extensor digitorum longus (EDL) muscles. RESULTS Pyruvate and acetate were more avidly consumed than glucose with resultant increases in glutamate labeling in both muscle groups. Glucose incubation resulted in glutamate labeling, but with high anaplerotic flux in contrast to the labeling by pyruvate. Muscle fiber type distinctions were evident by differences in lactate enrichment and extent of substrate oxidation. CONCLUSION Isotope tracing experiments in isolated muscles reveal that pyruvate and acetate are avidly oxidized by isolated soleus and EDL muscles, whereas glucose labeling of glutamate is accompanied by high anaplerotic flux. We believe our results may set the stage for future examination of metabolic signatures of skeletal muscles from pre-clinical models of aging, type-2 diabetes and neuromuscular disease.
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Affiliation(s)
- Ram B Khattri
- Department of Applied Physiology and Kinesiology, College of Health & Human Performance, University of Florida, 124 Florida Gym, 1864 Stadium Road, Gainesville, FL, 32611, USA
| | - Jason Puglise
- Department of Applied Physiology and Kinesiology, College of Health & Human Performance, University of Florida, 124 Florida Gym, 1864 Stadium Road, Gainesville, FL, 32611, USA
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, College of Health & Human Performance, University of Florida, 124 Florida Gym, 1864 Stadium Road, Gainesville, FL, 32611, USA
- Myology Institute, University of Florida, Gainesville, USA
- Center for Exercise Science, University of Florida, Gainesville, FL, USA
| | - Glenn A Walter
- Department of Physiology and Functional Genomics, University of Florida, Gainesville, USA
- Myology Institute, University of Florida, Gainesville, USA
| | - Matthew E Merritt
- Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, USA
| | - Elisabeth R Barton
- Department of Applied Physiology and Kinesiology, College of Health & Human Performance, University of Florida, 124 Florida Gym, 1864 Stadium Road, Gainesville, FL, 32611, USA.
- Myology Institute, University of Florida, Gainesville, USA.
- Center for Exercise Science, University of Florida, Gainesville, FL, USA.
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21
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Khattri RB, Kim K, Anderson EM, Fazzone B, Harland KC, Hu Q, Palzkill VR, Cort TA, O'Malley KA, Berceli SA, Scali ST, Ryan TE. Metabolomic profiling reveals muscle metabolic changes following iliac arteriovenous fistula creation in mice. Am J Physiol Renal Physiol 2022; 323:F577-F589. [PMID: 36007889 PMCID: PMC9602894 DOI: 10.1152/ajprenal.00156.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 08/22/2022] [Accepted: 08/22/2022] [Indexed: 12/31/2022] Open
Abstract
End-stage kidney disease, the most advanced stage of chronic kidney disease (CKD), requires renal replacement therapy or kidney transplant to sustain life. To accomplish durable dialysis access, the creation of an arteriovenous fistula (AVF) has emerged as a preferred approach. Unfortunately, a significant proportion of patients that receive an AVF experience some form of hand dysfunction; however, the mechanisms underlying these side effects are not understood. In this study, we used nuclear magnetic resonance spectroscopy to investigate the muscle metabolome following iliac AVF placement in mice with CKD. To induce CKD, C57BL6J mice were fed an adenine-supplemented diet for 3 wk and then randomized to receive AVF or sham surgery. Two weeks following surgery, the quadriceps muscles were rapidly dissected and snap frozen for metabolite extraction and subsequent nuclear magnetic resonance analysis. Principal component analysis demonstrated clear separation between groups, confirming a unique metabolome in mice that received an AVF. AVF creation resulted in reduced levels of creatine, ATP, and AMP as well as increased levels of IMP and several tricarboxylic acid cycle metabolites suggesting profound energetic stress. Pearson correlation and multiple linear regression analyses identified several metabolites that were strongly linked to measures of limb function (grip strength, gait speed, and mitochondrial respiration). In summary, AVF creation generates a unique metabolome profile in the distal skeletal muscle indicative of an energetic crisis and myosteatosis.NEW & NOTEWORTHY Creation of an arteriovenous fistula (AVF) is the preferred approach for dialysis access, but some patients experience hand dysfunction after AVF creation. In this study, we provide a detailed metabolomic analysis of the limb muscle in a murine model of AVF. AVF creation resulted in metabolite changes associated with an energetic crisis and myosteatosis that associated with limb function.
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Affiliation(s)
- Ram B Khattri
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Kyoungrae Kim
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Erik M Anderson
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Florida
- Malcom Randall Veterans Affairs Medical Center, Gainesville, Florida
| | - Brian Fazzone
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Florida
- Malcom Randall Veterans Affairs Medical Center, Gainesville, Florida
| | - Kenneth C Harland
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Florida
- Malcom Randall Veterans Affairs Medical Center, Gainesville, Florida
| | - Qiongyao Hu
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Florida
- Malcom Randall Veterans Affairs Medical Center, Gainesville, Florida
| | - Victoria R Palzkill
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Tomas A Cort
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Kerri A O'Malley
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Florida
- Malcom Randall Veterans Affairs Medical Center, Gainesville, Florida
| | - Scott A Berceli
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Florida
- Malcom Randall Veterans Affairs Medical Center, Gainesville, Florida
| | - Salvatore T Scali
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Florida
- Malcom Randall Veterans Affairs Medical Center, Gainesville, Florida
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
- Center for Exercise Science, University of Florida, Gainesville, Florida
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22
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Anderson EM, Kim K, Fazzone BJ, Harland KC, Hu Q, Salyers Z, Palzkill VR, Cort TA, Kunz EM, Martin AJ, Neal D, O’Malley KA, Berceli SA, Ryan TE, Scali ST. Influences of Renal Insufficiency and Ischemia on Mitochondrial Bioenergetics and Limb Dysfunction in a Novel Murine Iliac Arteriovenous Fistula Model. JVS Vasc Sci 2022; 3:345-362. [DOI: 10.1016/j.jvssci.2022.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 10/06/2022] [Indexed: 11/05/2022] Open
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Palzkill VR, Thome T, Murillo AL, Khattri RB, Ryan TE. Increasing plasma L-kynurenine impairs mitochondrial oxidative phosphorylation prior to the development of atrophy in murine skeletal muscle: A pilot study. Front Physiol 2022; 13:992413. [PMID: 36246103 PMCID: PMC9562971 DOI: 10.3389/fphys.2022.992413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 08/22/2022] [Indexed: 11/14/2022] Open
Abstract
Introduction: L-Kynurenine (L-Kyn), a product of tryptophan (Trp) catabolism, has been linked with impairments in walking speed, muscle strength/size, and physical function. The purpose of this pilot study was to develop a dietary model that elevates plasma L-Kyn levels in mice and characterize its impact on muscle health and function. Methods: Four-month-old C57BL6J male mice were randomized to either a L-Kyn supplemented (150 mg/kg) or chow diet for 10 weeks. Plasma L-Kyn and Trp levels were measured via mass spectrometry. Primary outcomes included assessments of muscle weights, myofiber cross-sectional area (CSA), nerve-stimulated contractile performance, and mitochondrial oxidative phosphorylation (OXPHOS) and hydrogen peroxide (H2O2) production. Additional experiments in cultured myotubes explored the impact of enhancing L-Kyn metabolism. Results: Mice randomized to the L-Kyn diet displayed significant increases in plasma L-Kyn levels (p = 0.0028) and the L-Kyn/Trp ratio (p = 0.011) when compared to chow fed mice. Food intake and body weights were not different between groups. There were no detectable differences in muscle weights, myofiber CSA, or contractile performance. L-Kyn fed mice displayed reductions in mitochondrial OXPHOS (p = 0.05) and maximal ADP-stimulated respiration (p = 0.0498). In cultured myotubes, overexpression of peroxisome proliferator-activated receptor-gamma coactivator 1 alpha prevented atrophy and proteolysis, as well as deficits in mitochondrial respiration with L-Kyn treatment. Conclusion: Dietary feeding of L-Kyn increases plasma L-Kyn levels and the L-Kyn/Trp ratio in healthy male mice. Mitochondrial impairments in muscle were observed in mice with elevated L-Kyn without changes in muscle size or function. Enhancing L-Kyn metabolism can protect against these effects in culture myotubes.
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Affiliation(s)
- Victoria R. Palzkill
- Department of Applied Physiology and Kinesiology, Gainesville, FL, United States
| | - Trace Thome
- Department of Applied Physiology and Kinesiology, Gainesville, FL, United States
| | - Ania L. Murillo
- Department of Applied Physiology and Kinesiology, Gainesville, FL, United States
| | - Ram B. Khattri
- Department of Applied Physiology and Kinesiology, Gainesville, FL, United States
| | - Terence E. Ryan
- Department of Applied Physiology and Kinesiology, Gainesville, FL, United States
- Center for Exercise Science, Gainesville, FL, United States
- Myology Institute, University of Florida, Gainesville, FL, United States
- *Correspondence: Terence E. Ryan,
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Kumar RA, Thome T, Sharaf OM, Ryan TE, Arnaoutakis GJ, Jeng EI, Ferreira LF. Reversible Thiol Oxidation Increases Mitochondrial Electron Transport Complex Enzyme Activity but Not Respiration in Cardiomyocytes from Patients with End-Stage Heart Failure. Cells 2022; 11:cells11152292. [PMID: 35892589 PMCID: PMC9330889 DOI: 10.3390/cells11152292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 07/19/2022] [Accepted: 07/21/2022] [Indexed: 12/10/2022] Open
Abstract
Cardiomyocyte dysfunction in patients with end-stage heart failure with reduced ejection fraction (HFrEF) stems from mitochondrial dysfunction, which contributes to an energetic crisis. Mitochondrial dysfunction reportedly relates to increased markers of oxidative stress, but the impact of reversible thiol oxidation on myocardial mitochondrial function in patients with HFrEF has not been investigated. In the present study, we assessed mitochondrial function in ventricular biopsies from patients with end-stage HFrEF in the presence and absence of the thiol-reducing agent dithiothreitol (DTT). Isolated mitochondria exposed to DTT had increased enzyme activity of complexes I (p = 0.009) and III (p = 0.018) of the electron transport system, while complexes II (p = 0.630) and IV (p = 0.926) showed no changes. However, increased enzyme activity did not carry over to measurements of mitochondrial respiration in permeabilized bundles. Oxidative phosphorylation conductance (p = 0.439), maximal respiration (p = 0.312), and ADP sensitivity (p = 0.514) were unchanged by 5 mM DTT treatment. These results indicate that mitochondrial function can be modulated through reversible thiol oxidation, but other components of mitochondrial energy transfer are rate limiting in end-stage HFrEF. Optimal therapies to normalize cardiac mitochondrial respiration in patients with end-stage HFrEF may benefit from interventions to reverse thiol oxidation, which limits complex I and III activities.
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Affiliation(s)
- Ravi A. Kumar
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL 32611, USA; (R.A.K.); (T.T.); (T.E.R.)
| | - Trace Thome
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL 32611, USA; (R.A.K.); (T.T.); (T.E.R.)
| | - Omar M. Sharaf
- College of Medicine, University of Florida, Gainesville, FL 32611, USA;
| | - Terence E. Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL 32611, USA; (R.A.K.); (T.T.); (T.E.R.)
| | - George J. Arnaoutakis
- Department of Surgery, Division of Thoracic and Cardiovascular Surgery, University of Florida, Gainesville, FL 32611, USA; (G.J.A.); (E.I.J.)
| | - Eric I. Jeng
- Department of Surgery, Division of Thoracic and Cardiovascular Surgery, University of Florida, Gainesville, FL 32611, USA; (G.J.A.); (E.I.J.)
| | - Leonardo F. Ferreira
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL 32611, USA; (R.A.K.); (T.T.); (T.E.R.)
- Department of Physiology, Amsterdam UMC, 1081 HZ Amsterdam, The Netherlands
- Correspondence: ; Tel.: +1-352-294-1724
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Salyers ZR, Coleman M, Le D, Ryan TE. AAV-mediated expression of PFKFB3 in myofibers, but not endothelial cells, improves ischemic muscle function in mice with critical limb ischemia. Am J Physiol Heart Circ Physiol 2022; 323:H424-H436. [PMID: 35867710 DOI: 10.1152/ajpheart.00121.2022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
6-Phosphofructo-2-kinase/fructose-2,6-bisphosphatase 3 (PFKFB3) is a powerful driver of angiogenesis through its modulation of glycolytic metabolism within endothelial cells. Recent work has demonstrated that PFKFB3 modulates the response to muscle ischemia, however the cell specificity of these effects is not fully understood. In this study, we tested the impact of viral mediated expression of PFKFB3, driven by gene promoters specific for myofibers or endothelial cells, on ischemic hindlimb revascularization and muscle function. We hypothesized that both endothelium- and muscle-specific expression of PFKFB3 would attenuate limb pathology following femoral artery ligation. Male and female BALB/cJ mice were injected with adeno-associated virus encoding the either a green fluorescent protein (GFP) or PFKFB3 driven by either the human skeletal actin (ACTA1) or cadherin-5 (Cdh5) promoters. Four weeks after AAV treatment, mice were subjected to unilateral femoral artery ligation and limb perfusion and muscle function were assessed. Both endothelium- and muscle-specific PFKFB3 expression resulted in significantly more perfused capillaries within the ischemic limb muscle, but neither changed myofiber size/area. Muscle-, but not endothelium-specific, PFKFB3 expression significantly improved maximal force production in ischemic muscle (P=0.0005). Notably, there was a significant effect of sex on maximal force levels in both cohorts of mice (P=0.0075 and P=0.0481), indicating that female mice had higher ischemic muscle strength compared to male mice, regardless of treatment group. Taken together, these data demonstrate that while both muscle- and endothelium-specific expression of PFKFB3 enhanced ischemic revascularization, only muscle-specific PFKFB3 expression improved muscle function.
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Affiliation(s)
- Zachary R Salyers
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, United States
| | - Madeline Coleman
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, United States
| | - Dennis Le
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, United States
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, United States.,Center for Exercise Science, University of Florida, Gainesville, FL, United States.,Myology Institute, University of Florida, Gainesville, FL, United States
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Kim K, Anderson EM, Fazzone BJ, O'Malley KA, Berceli SA, Ryan TE, Scali ST. A Murine Model of Hemodialysis Access-related Hand Dysfunction. J Vis Exp 2022. [PMID: 35723470 DOI: 10.3791/63892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Chronic kidney disease is a major public health problem, and the prevalence of end-stage renal disease (ESRD) requiring chronic renal replacement therapies such as hemodialysis continues to increase. Autogenous arteriovenous fistula (AVF) placement remains a primary vascular access option for ESRD patients. Unfortunately, approximately half of the hemodialysis patients experience dialysis access-related hand dysfunction (ARHD), ranging from subtle paresthesia to digital gangrene. Notably, the underlying biologic drivers responsible for ARHD are poorly understood, and no adequate animal model exists to elucidate the mechanisms and/or develop novel therapeutics for the prevention/treatment of ARHD. Herein, we describe a new mouse model in which an AVF is created between the left common iliac artery and vein, thereby facilitating the assessment of limb pathophysiology. The microsurgery includes vessel isolation, longitudinal venotomy, creation of arteriovenous anastomosis, and venous reconstruction. Sham surgeries include all the critical steps except for AVF creation. Iliac AVF placement results in clinically relevant alterations in central hemodynamics, peripheral ischemia, and impairments in hindlimb neuromotor performance. This novel preclinical AVF model provides a useful platform that recapitulates common neuromotor perturbations reported by hemodialysis patients, allowing researchers to investigate the mechanisms of ARHD pathophysiology and test potential therapeutics.
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Affiliation(s)
- Kyoungrae Kim
- Department of Applied Physiology and Kinesiology, University of Florida
| | - Erik M Anderson
- Division of Vascular Surgery and Endovascular Therapy, University of Florida; Malcom Randall Veteran Affairs Medical Center
| | - Brian J Fazzone
- Division of Vascular Surgery and Endovascular Therapy, University of Florida; Malcom Randall Veteran Affairs Medical Center
| | - Kerri A O'Malley
- Division of Vascular Surgery and Endovascular Therapy, University of Florida; Malcom Randall Veteran Affairs Medical Center
| | - Scott A Berceli
- Division of Vascular Surgery and Endovascular Therapy, University of Florida; Malcom Randall Veteran Affairs Medical Center
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida; Center for Exercise Science, University of Florida
| | - Salvatore T Scali
- Division of Vascular Surgery and Endovascular Therapy, University of Florida; Malcom Randall Veteran Affairs Medical Center;
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Kim K, Anderson EM, Fazzone B, Harland KC, Hu Q, Khattri RB, Salyers Z, Palzkill VR, Cort TA, O'Malley KA, Berceli SA, Scali ST, Ryan TE. Assessment of hindlimb myopathy and mitochondrial bioenergetics in a unique mouse model of access‐related hand dysfunction. FASEB J 2022. [DOI: 10.1096/fasebj.2022.36.s1.r2958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kyoungrae Kim
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFL
| | - Erik M. Anderson
- Vascular Surgery and Endovascular TherapyUniversity of FloridaGainesvilleFL
- University of FloridaGainesvilleFL
| | - Brian Fazzone
- Vascular Surgery and Endovascular TherapyUniversity of FloridaGainesvilleFL
- University of FloridaGainesvilleFL
| | - Kenneth C. Harland
- Vascular Surgery and Endovascular TherapyUniversity of FloridaGainesvilleFL
- University of FloridaGainesvilleFL
| | - Qiongyao Hu
- Vascular Surgery and Endovascular TherapyUniversity of FloridaGainesvilleFL
- University of FloridaGainesvilleFL
| | - Ram B. Khattri
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFL
| | - Zach Salyers
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFL
| | - Victoria R. Palzkill
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFL
| | - Tomas A. Cort
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFL
| | - Kerri A. O'Malley
- Vascular Surgery and Endovascular TherapyUniversity of FloridaGainesvilleFL
- University of FloridaGainesvilleFL
| | - Scott A. Berceli
- Vascular Surgery and Endovascular TherapyUniversity of FloridaGainesvilleFL
- University of FloridaGainesvilleFL
| | | | - Terence E. Ryan
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFL
- Center for Exercise ScienceUniversity of FloridaGainesvilleFL
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Thome T, Miguez K, Willms AJ, Burke SK, Chandran V, de Souza AR, Fitzgerald LF, Baglole C, Anagnostou ME, Bourbeau J, Jagoe RT, Morais JA, Goddard Y, Taivassalo T, Ryan TE, Hepple RT. Chronic aryl hydrocarbon receptor activity phenocopies smoking-induced skeletal muscle impairment. J Cachexia Sarcopenia Muscle 2022; 13:589-604. [PMID: 34725955 PMCID: PMC8818603 DOI: 10.1002/jcsm.12826] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/30/2021] [Accepted: 09/11/2021] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Chronic obstructive pulmonary disease (COPD) patients exhibit skeletal muscle atrophy, denervation, and reduced mitochondrial oxidative capacity. Whilst chronic tobacco smoke exposure is implicated in COPD muscle impairment, the mechanisms involved are ambiguous. The aryl hydrocarbon receptor (AHR) is a ligand-activated transcription factor that activates detoxifying pathways with numerous exogenous ligands, including tobacco smoke. Whereas transient AHR activation is adaptive, chronic activation can be toxic. On this basis, we tested the hypothesis that chronic smoke-induced AHR activation causes adverse muscle impact. METHODS We used clinical patient muscle samples, and in vitro (C2C12 myotubes) and in vivo models (mouse), to perform gene expression, mitochondrial function, muscle and neuromuscular junction morphology, and genetic manipulations (adeno-associated virus-mediated gene transfer). RESULTS Sixteen weeks of tobacco smoke exposure in mice caused muscle atrophy, neuromuscular junction degeneration, and reduced oxidative capacity. Similarly, smoke exposure reprogrammed the muscle transcriptome, with down-regulation of mitochondrial and neuromuscular junction genes. In mouse and human patient specimens, smoke exposure increased muscle AHR signalling. Mechanistically, experiments in cultured myotubes demonstrated that smoke condensate activated the AHR, caused mitochondrial impairments, and induced an AHR-dependent myotube atrophy. Finally, to isolate the role of AHR activity, expression of a constitutively active AHR mutant without smoke exposure caused atrophy and mitochondrial impairments in cultured myotubes, and muscle atrophy and neuromuscular junction degeneration in mice. CONCLUSIONS These results establish that chronic AHR activity, as occurs in smokers, phenocopies the atrophy, mitochondrial impairment, and neuromuscular junction degeneration caused by chronic tobacco smoke exposure.
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Affiliation(s)
- Trace Thome
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Kayla Miguez
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Alexander J Willms
- Research Institute of the McGill University Health Center, McGill University, Montreal, Quebec, Canada
| | - Sarah K Burke
- Department of Physical Therapy, University of Florida, Gainesville, FL, USA
| | | | - Angela R de Souza
- Research Institute of the McGill University Health Center, McGill University, Montreal, Quebec, Canada
| | - Liam F Fitzgerald
- Department of Physical Therapy, University of Florida, Gainesville, FL, USA
| | - Carolyn Baglole
- Research Institute of the McGill University Health Center, McGill University, Montreal, Quebec, Canada
| | | | - Jean Bourbeau
- Research Institute of the McGill University Health Center, McGill University, Montreal, Quebec, Canada
| | - R Thomas Jagoe
- Research Institute of the McGill University Health Center, McGill University, Montreal, Quebec, Canada
| | - Jose A Morais
- Research Institute of the McGill University Health Center, McGill University, Montreal, Quebec, Canada
| | - Yana Goddard
- Department of Medicine, University of Florida, Gainesville, FL, USA
| | - Tanja Taivassalo
- Department of Physiology and Functional Genomics, University of Florida, Gainesville, FL, USA
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Russell T Hepple
- Department of Physical Therapy, University of Florida, Gainesville, FL, USA.,Department of Physiology and Functional Genomics, University of Florida, Gainesville, FL, USA
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Ryan TE, Kim K, Scali ST, Berceli SA, Thome T, Salyers ZR, O'Malley KA, Green TD, Karnekar R, Fisher‐Wellman KH, Yamaguchi DJ, McClung JM. Interventional- and amputation-stage muscle proteomes in the chronically threatened ischemic limb. Clin Transl Med 2022; 12:e658. [PMID: 35073463 PMCID: PMC8785983 DOI: 10.1002/ctm2.658] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 11/05/2021] [Accepted: 11/11/2021] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Despite improved surgical approaches for chronic limb-threatening ischemia (CLTI), amputation rates remain high and contributing tissue-level factors remain unknown. The purpose of this study was twofold: (1) to identify differences between the healthy adult and CLTI limb muscle proteome, and (2) to identify differences in the limb muscle proteome of CLTI patients prior to surgical intervention or at the time of amputation. METHODS AND RESULTS Gastrocnemius muscle was collected from non-ischemic controls (n = 19) and either pre-interventional surgery (n = 10) or at amputation outcome (n = 29) CLTI patients. All samples were subjected to isobaric tandem-mass-tag-assisted proteomics. The mitochondrion was the primary classification of downregulated proteins (> 70%) in CLTI limb muscles and paralleled robust functional mitochondrial impairment. Upregulated proteins (> 38%) were largely from the extracellular matrix. Across the two independent sites, 39 proteins were downregulated and 12 upregulated uniformly. Pre-interventional CLTI muscles revealed a robust upregulation of mitochondrial proteins but modest functional impairments in fatty acid oxidation as compared with controls. Comparison of pre-intervention and amputation CLTI limb muscles revealed mitochondrial proteome and functional deficits similar to that between amputation and non-ischemic controls. Interestingly, these observed changes occurred despite 62% of the amputation CLTI patients having undergone a prior surgical intervention. CONCLUSIONS The CLTI proteome supports failing mitochondria as a phenotype that is unique to amputation outcomes. The signature of pre-intervention CLTI muscle reveals stable mitochondrial protein abundance that is insufficient to uniformly prevent functional impairments. Taken together, these findings support the need for future longitudinal investigations aimed to determine whether mitochondrial failure is causally involved in amputation outcomes from CLTI.
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Affiliation(s)
- Terence E. Ryan
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFloridaUSA
- Center for Exercise ScienceUniversity of FloridaGainesvilleFloridaUSA
- Myology InstituteUniversity of FloridaGainesvilleFloridaUSA
| | - Kyoungrae Kim
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFloridaUSA
| | - Salvatore T. Scali
- Division of Vascular Surgery and Endovascular TherapyUniversity of FloridaGainesvilleFloridaUSA
- Malcom Randall Veteran Affairs Medical CenterGainesvilleFloridaUSA
| | - Scott A. Berceli
- Division of Vascular Surgery and Endovascular TherapyUniversity of FloridaGainesvilleFloridaUSA
- Malcom Randall Veteran Affairs Medical CenterGainesvilleFloridaUSA
| | - Trace Thome
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFloridaUSA
| | - Zachary R. Salyers
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFloridaUSA
| | - Kerri A. O'Malley
- Division of Vascular Surgery and Endovascular TherapyUniversity of FloridaGainesvilleFloridaUSA
- Malcom Randall Veteran Affairs Medical CenterGainesvilleFloridaUSA
| | - Thomas D. Green
- Department of PhysiologyBrody School of MedicineEast Carolina UniversityGreenvilleNorth CarolinaUSA
- East Carolina Diabetes and Obesity InstituteEast Carolina UniversityGreenvilleNorth CarolinaUSA
| | - Reema Karnekar
- Department of PhysiologyBrody School of MedicineEast Carolina UniversityGreenvilleNorth CarolinaUSA
- East Carolina Diabetes and Obesity InstituteEast Carolina UniversityGreenvilleNorth CarolinaUSA
| | - Kelsey H. Fisher‐Wellman
- Department of PhysiologyBrody School of MedicineEast Carolina UniversityGreenvilleNorth CarolinaUSA
- East Carolina Diabetes and Obesity InstituteEast Carolina UniversityGreenvilleNorth CarolinaUSA
| | - Dean J. Yamaguchi
- Department of Cardiovascular ScienceEast Carolina UniversityGreenvilleNorth CarolinaUSA
- Division of SurgeryEast Carolina UniversityGreenvilleNorth CarolinaUSA
| | - Joseph M. McClung
- Department of PhysiologyBrody School of MedicineEast Carolina UniversityGreenvilleNorth CarolinaUSA
- East Carolina Diabetes and Obesity InstituteEast Carolina UniversityGreenvilleNorth CarolinaUSA
- Department of Cardiovascular ScienceEast Carolina UniversityGreenvilleNorth CarolinaUSA
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30
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Salyers ZR, Mariani V, Balestrieri N, Kumar RA, Vugman NA, Thome T, Villani KR, Berceli SA, Scali ST, Vasilakos G, Ryan TE. S100A8 and S100A9 are elevated in chronically threatened ischemic limb muscle and induce ischemic mitochondrial pathology in mice. JVS Vasc Sci 2022; 3:232-245. [PMID: 35647565 PMCID: PMC9133641 DOI: 10.1016/j.jvssci.2022.03.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 03/22/2022] [Indexed: 11/19/2022] Open
Abstract
Objective The objective of the present study was to determine whether elevated levels of S100A8 and S100A9 (S100A8/A9) alarmins contribute to ischemic limb pathology. Methods Gastrocnemius muscle was collected from control patients without peripheral arterial disease (PAD; n = 14) and patients with chronic limb threatening limb ischemia (CLTI; n = 14). Mitochondrial function was assessed in permeabilized muscle fibers, and RNA and protein analyses were used to quantify the S100A8/A9 levels. Additionally, a mouse model of hindlimb ischemia with and without exogenous delivery of S100A8/A9 was used. Results Compared with the non-PAD control muscles, CLTI muscles displayed significant increases in the abundance of S100A8 and S100A9 at both mRNA and protein levels (P < .01). The CLTI muscles also displayed significant impairment in mitochondrial oxidative phosphorylation and increased mitochondrial hydrogen peroxide production compared with the non-PAD controls. The S100A8/A9 levels correlated significantly with the degree of muscle mitochondrial dysfunction (P < .05 for all). C57BL6J mice treated with recombinant S100A8/A9 displayed impaired perfusion recovery and muscle mitochondrial impairment compared with the placebo-treated mice after hindlimb ischemia surgery. These mitochondrial deficits observed after S100A8/A9 treatment were confirmed in the muscle cell culture system under normoxic conditions. Conclusions The S100A8/A9 levels were increased in CLTI limb muscle specimens compared with the non-PAD control muscle specimens, and the level of accumulation was associated with muscle mitochondrial impairment. Elevated S100A8/A9 levels in mice subjected to hindlimb ischemia impaired perfusion recovery and mitochondrial function. Together, these findings suggest that the inflammatory mediators S100A8/A9 might be directly involved in ischemic limb pathology. Despite improvements in the surgical management of chronic limb threatening limb ischemia (CLTI), the rates of major adverse limb events have remained high. Skeletal muscle has emerged as a strong predictor of outcomes in peripheral arterial disease (PAD)/CLTI; however, a complete understanding of muscle pathology in CLTI is lacking. This study identified elevated S100A8 and S100A9 alarmin proteins as a characteristic of CLTI muscle specimens and that the S100A8/A9 levels are associated with the degree of mitochondrial impairment in patient limb muscle specimens. Using a mouse model of PAD, treatment with S100A8/A9 exacerbated ischemic limb pathology, including impaired limb perfusion recovery and muscle mitochondrial impairment. Taken together, these findings connect the inflammatory milieu in the CLTI limb to exacerbated limb muscle outcomes via mitochondrial alterations.
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Affiliation(s)
- Zachary R. Salyers
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL
| | - Vinicius Mariani
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL
| | - Nicholas Balestrieri
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL
| | - Ravi A. Kumar
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL
| | - Nicholas A. Vugman
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL
| | - Trace Thome
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL
| | - Katelyn R. Villani
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL
| | - Scott A. Berceli
- Department of Surgery, University of Florida, Gainesville, FL
- Malcom Randall Veterans Affairs Medical Center, Gainesville, FL
| | - Salvatore T. Scali
- Department of Surgery, University of Florida, Gainesville, FL
- Malcom Randall Veterans Affairs Medical Center, Gainesville, FL
| | - Georgios Vasilakos
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL
| | - Terence E. Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL
- Center for Exercise Science, University of Florida, Gainesville, FL
- Myology Institute, University of Florida, Gainesville, FL
- Correspondence: Terence E. Ryan, PhD, Department of Applied Physiology and Kinesiology, University of Florida, 1864 Stadium Rd, Gainesville, FL 32611
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31
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Kelley RC, Betancourt L, Noriega AM, Brinson SC, Curbelo-Bermudez N, Hahn D, Kumar RA, Balazic E, Muscato DR, Ryan TE, van der Pijl RJ, Shen S, Ottenheijm CAC, Ferreira LF. Skeletal myopathy in a rat model of postmenopausal heart failure with preserved ejection fraction. J Appl Physiol (1985) 2022; 132:106-125. [PMID: 34792407 PMCID: PMC8742741 DOI: 10.1152/japplphysiol.00170.2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 11/01/2021] [Accepted: 11/11/2021] [Indexed: 01/03/2023] Open
Abstract
Heart failure with preserved ejection fraction (HFpEF) accounts for ∼50% of all patients with heart failure and frequently affects postmenopausal women. The HFpEF condition is phenotype-specific, with skeletal myopathy that is crucial for disease development and progression. However, most of the current preclinical models of HFpEF have not addressed the postmenopausal phenotype. We sought to advance a rodent model of postmenopausal HFpEF and examine skeletal muscle abnormalities therein. Female, ovariectomized, spontaneously hypertensive rats (SHRs) were fed a high-fat, high-sucrose diet to induce HFpEF. Controls were female sham-operated Wistar-Kyoto rats on a lean diet. In a complementary, longer-term cohort, controls were female sham-operated SHRs on a lean diet to evaluate the effect of strain difference in the model. Our model developed key features of HFpEF that included increased body weight, glucose intolerance, hypertension, cardiac hypertrophy, diastolic dysfunction, exercise intolerance, and elevated plasma cytokines. In limb skeletal muscle, HFpEF decreased specific force by 15%-30% (P < 0.05) and maximal mitochondrial respiration by 40%-55% (P < 0.05), increased oxidized glutathione by approximately twofold (P < 0.05), and tended to increase mitochondrial H2O2 emission (P = 0.10). Muscle fiber cross-sectional area, markers of mitochondrial content, and indices of capillarity were not different between control and HFpEF in our short-term cohort. Overall, our preclinical model of postmenopausal HFpEF recapitulates several key features of the disease. This new model reveals contractile and mitochondrial dysfunction and redox imbalance that are potential contributors to abnormal metabolism, exercise intolerance, and diminished quality of life in patients with postmenopausal HFpEF.NEW & NOTEWORTHY Heart failure with preserved ejection fraction (HFpEF) is a condition with phenotype-specific features highly prevalent in postmenopausal women and skeletal myopathy contributing to disease development and progression. We advanced a rat model of postmenopausal HFpEF with key cardiovascular and systemic features of the disease. Our study shows that the skeletal myopathy of postmenopausal HFpEF includes loss of limb muscle-specific force independent of atrophy, mitochondrial dysfunction, and oxidized shift in redox balance.
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Affiliation(s)
- Rachel C Kelley
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Lauren Betancourt
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Andrea M Noriega
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Suzanne C Brinson
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Nuria Curbelo-Bermudez
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Dongwoo Hahn
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Ravi A Kumar
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Eliza Balazic
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Derek R Muscato
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Robbert J van der Pijl
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona
- Department of Physiology, Amsterdam UMC, Amsterdam, The Netherlands
| | - Shengyi Shen
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona
| | - Coen A C Ottenheijm
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona
- Department of Physiology, Amsterdam UMC, Amsterdam, The Netherlands
| | - Leonardo F Ferreira
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
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32
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Kim K, Anderson EM, Martin AJ, Hu Q, Cort TA, Harland KC, O'Malley KA, Lu G, Berceli SA, Ryan TE, Scali ST. Development of a murine iliac arteriovenous fistula model for examination of hemodialysis access-related limb pathophysiology. JVS Vasc Sci 2021; 2:247-259. [PMID: 34816137 PMCID: PMC8591416 DOI: 10.1016/j.jvssci.2021.09.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 09/27/2021] [Indexed: 11/07/2022] Open
Abstract
Objective Hemodialysis access-related hand dysfunction is a common clinical feature of patients with chronic kidney disease (CKD) after arteriovenous fistula (AVF) placement. The heterogeneity in symptoms and the lack of a predictive association with changes in hemodynamic alterations precipitated by the AVF suggest that other factors are involved in the mechanisms responsible for causing hand and limb dysfunction postoperatively. To the best of our knowledge, no suitable animal models have provided a platform for performing preclinical experiments designed to elucidate the biologic drivers of access-related hand dysfunction. Therefore, our objective was to develop a novel murine AVF model that could be used to study dialysis access-related limb dysfunction. Methods Male 8-week-old C57BL/6J mice (n = 15/group) were exposed to either an adenine-supplemented diet to induce CKD or casein-based chow (control). Four weeks after the diet intervention, the mice were randomly assigned to receive an iliac AVF (n = 10/group) or sham surgery (n = 5/group) on the left hindlimb. The mice were sacrificed 2 weeks after surgery, and AVF specimens and hindlimb skeletal muscles were collected for further analysis. Results Before AVF or sham surgery, the glomerular filtration rates were significantly reduced and the blood urea nitrogen levels were significantly elevated in the CKD groups compared with the controls (P < .05). AVF surgery was associated with an ∼80% patency rate among the survivors (four control and three CKD mice died postoperatively). Patency was verified by changes in hemodynamics using Doppler ultrasound imaging and altered histologic morphology. Compared with sham surgery, AVF surgery reduced ipsilateral hindlimb perfusion to the tibialis anterior muscle (20%-40%) and paw (40%-50%), which remained stable until euthanasia. Analysis of gastrocnemius muscle mitochondrial respiratory function uncovered a significant decrease (40%-50%) in mitochondrial function in the AVF mice. No changes were found in the muscle mass, myofiber cross-sectional area, or centrally nucleated fiber proportion in the extensor digitorum longus and soleus muscles between the sham and AVF mice. Conclusions The results from the present study have demonstrated that iliac AVF formation is a practical animal model that facilitates examination of hemodialysis access-related limb dysfunction. AVF surgery produced the expected hemodynamic changes, and evaluation of the limb muscle revealed a substantial mitochondrial impairment that was present without changes in muscle size. Autogenous arteriovenous fistula creation remains the preferred vascular access option for patients requiring chronic hemodialysis therapy. However, access-related hand dysfunction (ARHD) remains highly prevalent in this population. Clinical management of the disability is difficult because of symptom heterogeneity and limited treatment options. Additionally, the current preclinical models do not adequately replicate the pathologic condition to allow for investigation of underlying mechanisms and to test new therapies. Therefore, medical progress has been marginal. In the present study, we have outlined a novel murine model to study ARHD and described the associated mitochondrial impairments, providing a unique tool for preclinical therapeutic development.
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Affiliation(s)
- Kyoungrae Kim
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Fla
| | - Erik M Anderson
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Fla.,Malcolm Randall Veteran Affairs Medical Center, Gainesville, Fla
| | - Andrew J Martin
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Fla.,Malcolm Randall Veteran Affairs Medical Center, Gainesville, Fla
| | - Qiongyao Hu
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Fla.,Malcolm Randall Veteran Affairs Medical Center, Gainesville, Fla
| | - Tomas A Cort
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Fla
| | - Kenneth C Harland
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Fla.,Malcolm Randall Veteran Affairs Medical Center, Gainesville, Fla
| | - Kerri A O'Malley
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Fla.,Malcolm Randall Veteran Affairs Medical Center, Gainesville, Fla
| | - Guanyi Lu
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Fla
| | - Scott A Berceli
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Fla.,Malcolm Randall Veteran Affairs Medical Center, Gainesville, Fla
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Fla.,Center for Exercise Science, University of Florida, Gainesville, Fla
| | - Salvatore T Scali
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Fla.,Malcolm Randall Veteran Affairs Medical Center, Gainesville, Fla
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Thome T, Coleman MD, Ryan TE. Mitochondrial Bioenergetic and Proteomic Phenotyping Reveals Organ-Specific Consequences of Chronic Kidney Disease in Mice. Cells 2021; 10:3282. [PMID: 34943790 PMCID: PMC8699079 DOI: 10.3390/cells10123282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/18/2021] [Accepted: 11/22/2021] [Indexed: 12/17/2022] Open
Abstract
Chronic kidney disease (CKD) results in reduced kidney function, uremia, and accumulation of uremic metabolites. Mitochondrial alterations have been suggested to play a role in the disease pathology within various tissues. The purpose of this study was to perform a comprehensive bioenergetic and proteomic phenotyping of mitochondria from skeletal muscle (SkM), cardiac muscle (CM), and renal tissue from mice with CKD. The 5-month-old C57BL/6J male mice were fed a casein control or adenine-supplemented diet for 6 months. CKD was confirmed by blood urea nitrogen. A mitochondrial diagnostic workflow was employed to examine respiratory function, membrane and redox potential, reactive oxygen species production, and maximal activities of matrix dehydrogenases and electron transport system (ETS) protein complexes. Additionally, tandem-mass-tag-assisted proteomic analyses were performed to uncover possible differences in mitochondrial protein abundance. CKD negatively impacted mitochondrial energy transduction (all p < 0.05) in SkM, CM, and renal mitochondria, when assessed at physiologically relevant cellular energy demands (ΔGATP) and revealed the tissue-specific impact of CKD on mitochondrial health. Proteomic analyses indicated significant abundance changes in CM and renal mitochondria (115 and 164 proteins, p < 0.05), but no differences in SkM. Taken together, these findings reveal the tissue-specific impact of chronic renal insufficiency on mitochondrial health.
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Affiliation(s)
- Trace Thome
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL 32611, USA; (T.T.); (M.D.C.)
| | - Madeline D. Coleman
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL 32611, USA; (T.T.); (M.D.C.)
| | - Terence E. Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL 32611, USA; (T.T.); (M.D.C.)
- Center for Exercise Science, University of Florida, Gainesville, FL 32611, USA
- Myology Institute, University of Florida, Gainesville, FL 32611, USA
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Gross DA, Cheng HS, Zhuang R, McCoy MG, Pérez-Cremades D, Salyers Z, Wara AKMK, Haemmig S, Ryan TE, Feinberg MW. Deficiency of lncRNA SNHG12 impairs ischemic limb neovascularization by altering an endothelial cell cycle pathway. JCI Insight 2021; 7:150761. [PMID: 34793334 PMCID: PMC8765056 DOI: 10.1172/jci.insight.150761] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 11/17/2021] [Indexed: 01/10/2023] Open
Abstract
SNHG12, a long noncoding RNA (lncRNA) dysregulated in atherosclerosis, is known to be a key regulator of vascular senescence in endothelial cells (ECs). However, its role in angiogenesis and peripheral artery disease has not been elucidated. Hind-limb ischemia studies using femoral artery ligation (FAL) in mice showed that SNHG12 expression falls readily in the acute phase of the response to limb ischemia in gastrocnemius muscle and recovers to normal when blood flow recovery is restored to ischemic muscle, indicating that it likely plays a role in the angiogenic response to ischemia. Gain- and loss-of-function studies demonstrated that SNHG12 regulated angiogenesis — SNHG12 deficiency reduced cell proliferation, migration, and endothelial sprouting, whereas overexpression promoted these angiogenic functions. We identified SNHG12 binding partners by proteomics that may contribute to its role in angiogenesis, including IGF-2 mRNA–binding protein 3 (IGF2BP3, also known as IMP3). RNA-Seq profiling of SNHG12-deficient ECs showed effects on angiogenesis pathways and identified a strong effect on cell cycle regulation, which may be modulated by IMP3. Knockdown of SNHG12 in mice undergoing FAL using injected gapmeRs) decreased angiogenesis, an effect that was more pronounced in a model of insulin-resistant db/db mice. RNA-Seq profiling of the EC and non-EC compartments in these mice revealed a likely role of SNHG12 knockdown on Wnt, Notch, and angiopoietin signaling pathways. Together, these findings indicate that SNHG12 plays an important role in the angiogenic EC response to ischemia.
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Affiliation(s)
- David A Gross
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, United States of America
| | - Henry S Cheng
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, United States of America
| | - Rulin Zhuang
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, United States of America
| | - Michael G McCoy
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, United States of America
| | - Daniel Pérez-Cremades
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, United States of America
| | - Zachary Salyers
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, United States of America
| | - A K M Khyrul Wara
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, United States of America
| | - Stefan Haemmig
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, United States of America
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, United States of America
| | - Mark W Feinberg
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, United States of America
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Hahn D, Kumar RA, Muscato DR, Ryan TE, Schröder K, Ferreira LF. Nox4 Knockout Does Not Prevent Diaphragm Atrophy, Contractile Dysfunction, or Mitochondrial Maladaptation in the Early Phase Post-Myocardial Infarction in Mice. Cell Physiol Biochem 2021; 55:489-504. [PMID: 34416105 PMCID: PMC10167972 DOI: 10.33594/000000400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/28/2021] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND/AIMS Diaphragm dysfunction with increased reactive oxygen species (ROS) occurs within 72 hrs post-myocardial infarction (MI) in mice and may contribute to loss of inspiratory maximal pressure and endurance in patients. METHODS We used wild-type (WT) and whole-body Nox4 knockout (Nox4KO) mice to measure diaphragm bundle force in vitro with a force transducer, mitochondrial respiration in isolated fiber bundles with an O2 sensor, mitochondrial ROS by fluorescence, mRNA (RT-PCR) and protein (immunoblot), and fiber size by histology 72 hrs post-MI. RESULTS MI decreased diaphragm fiber cross-sectional area (CSA) (~15%, p = 0.015) and maximal specific force (10%, p = 0.005), and increased actin carbonylation (5-10%, p = 0.007) in both WT and Nox4KO. Interestingly, MI did not affect diaphragm mRNA abundance of MAFbx/atrogin-1 and MuRF-1 but Nox4KO decreased it by 20-50% (p < 0.01). Regarding the mitochondria, MI and Nox4KO decreased the protein abundance of citrate synthase and subunits of electron transport system (ETS) complexes and increased mitochondrial O2 flux (JO2) and H2O2 emission (JH2O2) normalized to citrate synthase. Mitochondrial electron leak (JH2O2/JO2) in the presence of ADP was lower in Nox4KO and not changed by MI. CONCLUSION Our study shows that the early phase post-MI causes diaphragm atrophy, contractile dysfunction, sarcomeric actin oxidation, and decreases citrate synthase and subunits of mitochondrial ETS complexes. These factors are potential causes of loss of inspiratory muscle strength and endurance in patients, which likely contribute to the pathophysiology in the early phase post-MI. Whole-body Nox4KO did not prevent the diaphragm abnormalities induced 72 hrs post-MI, suggesting that systemic pharmacological inhibition of Nox4 will not benefit patients in the early phase post-MI.
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Affiliation(s)
- Dongwoo Hahn
- Department of Applied Physiology and Kinesiology, College of Health and Human Performance, University of Florida, Gainesville, FL, USA
| | - Ravi A Kumar
- Department of Applied Physiology and Kinesiology, College of Health and Human Performance, University of Florida, Gainesville, FL, USA
| | - Derek R Muscato
- Department of Applied Physiology and Kinesiology, College of Health and Human Performance, University of Florida, Gainesville, FL, USA
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, College of Health and Human Performance, University of Florida, Gainesville, FL, USA
| | - Katrin Schröder
- Institute for Cardiovascular Physiology, Goethe University, Frankfurt, Germany
| | - Leonardo F Ferreira
- Department of Applied Physiology and Kinesiology, College of Health and Human Performance, University of Florida, Gainesville, FL, USA,
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Laitano O, Pindado J, Valera I, Spradlin RA, Murray KO, Villani KR, Alzahrani JM, Ryan TE, Efron PA, Ferreira LF, Barton ER, Clanton TL. The impact of hindlimb disuse on sepsis-induced myopathy in mice. Physiol Rep 2021; 9:e14979. [PMID: 34309237 PMCID: PMC8311555 DOI: 10.14814/phy2.14979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 06/29/2021] [Indexed: 11/24/2022] Open
Abstract
Sepsis induces a myopathy characterized by loss of muscle mass and weakness. Septic patients undergo prolonged periods of limb muscle disuse due to bed rest. The contribution of limb muscle disuse to the myopathy phenotype remains poorly described. To characterize sepsis-induced myopathy with hindlimb disuse, we combined the classic sepsis model via cecal ligation and puncture (CLP) with the disuse model of hindlimb suspension (HLS) in mice. Male C57bl/6j mice underwent CLP or SHAM surgeries. Four days after surgeries, mice underwent HLS or normal ambulation (NA) for 7 days. Soleus (SOL) and extensor digitorum longus (EDL) were dissected for in vitro muscle mechanics, morphological, and histological assessments. In SOL muscles, both CLP+NA and SHAM+HLS conditions elicited ~20% reduction in specific force (p < 0.05). When combined, CLP+HLS elicited ~35% decrease in specific force (p < 0.05). Loss of maximal specific force (~8%) was evident in EDL muscles only in CLP+HLS mice (p < 0.05). CLP+HLS reduced muscle fiber cross-sectional area (CSA) and mass in SOL (p < 0.05). In EDL muscles, CLP+HLS decreased absolute mass to a smaller extent (p < 0.05) with no changes in CSA. Immunohistochemistry revealed substantial myeloid cell infiltration (CD68+) in SOL, but not in EDL muscles, of CLP+HLS mice (p < 0.05). Combining CLP with HLS is a feasible model to study sepsis-induced myopathy in mice. Hindlimb disuse combined with sepsis induced muscle dysfunction and immune cell infiltration in a muscle dependent manner. These findings highlight the importance of rehabilitative interventions in septic hosts to prevent muscle disuse and help attenuate the myopathy.
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Affiliation(s)
- Orlando Laitano
- Department of Nutrition and Integrative PhysiologyCollege of Health and Human SciencesFlorida State UniversityTallahasseeFLUSA
| | - Jose Pindado
- Department of Nutrition and Integrative PhysiologyCollege of Health and Human SciencesFlorida State UniversityTallahasseeFLUSA
| | - Isela Valera
- Department of Nutrition and Integrative PhysiologyCollege of Health and Human SciencesFlorida State UniversityTallahasseeFLUSA
| | - Ray A. Spradlin
- Department of Applied Physiology and KinesiologyCollege of Health and Human PerformanceUniversity of FloridaGainesvilleFLUSA
| | - Kevin O. Murray
- Department of Applied Physiology and KinesiologyCollege of Health and Human PerformanceUniversity of FloridaGainesvilleFLUSA
| | - Katelyn R. Villani
- Department of Applied Physiology and KinesiologyCollege of Health and Human PerformanceUniversity of FloridaGainesvilleFLUSA
| | - Jamal M. Alzahrani
- Department of Applied Physiology and KinesiologyCollege of Health and Human PerformanceUniversity of FloridaGainesvilleFLUSA
| | - Terence E. Ryan
- Department of Applied Physiology and KinesiologyCollege of Health and Human PerformanceUniversity of FloridaGainesvilleFLUSA
| | - Philip A. Efron
- Department of SurgeryCollege of MedicineUniversity of FloridaGainesvilleFLUSA
| | - Leonardo F. Ferreira
- Department of Applied Physiology and KinesiologyCollege of Health and Human PerformanceUniversity of FloridaGainesvilleFLUSA
| | - Elisabeth R. Barton
- Department of Applied Physiology and KinesiologyCollege of Health and Human PerformanceUniversity of FloridaGainesvilleFLUSA
| | - Thomas L. Clanton
- Department of Applied Physiology and KinesiologyCollege of Health and Human PerformanceUniversity of FloridaGainesvilleFLUSA
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Kim K, Anderson EM, Thome T, Lu G, Salyers ZR, Cort TA, O'Malley KA, Scali ST, Ryan TE. Skeletal myopathy in CKD: a comparison of adenine-induced nephropathy and 5/6 nephrectomy models in mice. Am J Physiol Renal Physiol 2021; 321:F106-F119. [PMID: 34121452 PMCID: PMC8321803 DOI: 10.1152/ajprenal.00117.2021] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 06/07/2021] [Accepted: 06/09/2021] [Indexed: 12/26/2022] Open
Abstract
Preclinical animal models of chronic kidney disease (CKD) are critical to investigate the underlying mechanisms of disease and to evaluate the efficacy of novel therapeutics aimed to treat CKD-associated pathologies. The objective of the present study was to compare the adenine diet and 5/6 nephrectomy (Nx) CKD models in mice. Male and female 10-wk-old C57BL/6J mice (n = 5-9 mice/sex/group) were randomly allocated to CKD groups (0.2-0.15% adenine-supplemented diet or 5/6 Nx surgery) or the corresponding control groups (casein diet or sham surgery). Following the induction of CKD, the glomerular filtration rate was reduced to a similar level in both adenine and 5/6 Nx mice (adenine diet-fed male mice: 81.1 ± 41.9 µL/min vs. 5/6 Nx male mice: 160 ± 80.9 µL/min, P = 0.5875; adenine diet-fed female mice: 112.9 ± 32.4 µL/min vs. 5/6 Nx female mice: 107.0 ± 45.7 µL/min, P = 0.9995). Serum metabolomics analysis indicated that established uremic toxins were robustly elevated in both CKD models, although some differences were observed between CKD models (i.e., p-cresol sulfate). Dysregulated phosphate homeostasis was observed in the adenine model only, whereas Ca2+ homeostasis was disturbed in male mice with both CKD models. Compared with control mice, muscle mass and myofiber cross-sectional areas of the extensor digitorum longus and soleus muscles were ∼18-24% smaller in male CKD mice regardless of the model but were not different in female CKD mice (P > 0.05). Skeletal muscle mitochondrial respiratory function was significantly decreased (19-24%) in CKD mice in both models and sexes. These findings demonstrate that adenine diet and 5/6 Nx models of CKD have similar levels of renal dysfunction and skeletal myopathy. However, the adenine diet model demonstrated superior performance with regard to mortality (∼20-50% mortality for 5/6 Nx vs. 0% mortality for the adenine diet, P < 0.05 for both sexes) compared with the 5/6 Nx surgical model.NEW & NOTEWORTHY Numerous preclinical models of chronic kidney disease have been used to evaluate skeletal muscle pathology; however, direct comparisons of popular models are not available. In this study, we compared adenine-induced nephropathy and 5/6 nephrectomy models. Both models produced equivalent levels of muscle atrophy and mitochondrial impairment, but the adenine model exhibited lower mortality rates, higher consistency in uremic toxin levels, and dysregulated phosphate homeostasis compared with the 5/6 nephrectomy model.
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Affiliation(s)
- Kyoungrae Kim
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Erik M Anderson
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Florida
- Malcom Randall Veteran Affairs Medical Center, Gainesville, Florida
| | - Trace Thome
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Guanyi Lu
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Florida
| | - Zachary R Salyers
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Tomas A Cort
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Kerri A O'Malley
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Florida
- Malcom Randall Veteran Affairs Medical Center, Gainesville, Florida
| | - Salvatore T Scali
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, Florida
- Malcom Randall Veteran Affairs Medical Center, Gainesville, Florida
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
- Center for Exercise Science, University of Florida, Gainesville, Florida
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38
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Terwilliger ZS, Ryan TE, Goldberg EJ, Schmidt CA, Yamaguchi DJ, Karnekar R, Brophy P, Green TD, Zeczycki TN, Mac Gabhann F, Annex BH, McClung JM. Racial differences in the limb skeletal muscle transcriptional programs of patients with critical limb ischemia. Vasc Med 2021; 26:247-258. [PMID: 33685287 DOI: 10.1177/1358863x20983918] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Critical limb ischemia (CLI) is the most severe manifestation of peripheral artery disease (PAD) and is characterized by high rates of morbidity and mortality. As with most severe cardiovascular disease manifestations, Black individuals disproportionately present with CLI. Accordingly, there remains a clear need to better understand the reasons for this discrepancy and to facilitate personalized therapeutic options specific for this population. Gastrocnemius muscle was obtained from White and Black healthy adult volunteers and patients with CLI for whole transcriptome shotgun sequencing (WTSS) and enrichment analysis was performed to identify alterations in specific Reactome pathways. When compared to their race-matched healthy controls, both White and Black patients with CLI demonstrated similar reductions in nuclear and mitochondrial encoded genes and mitochondrial oxygen consumption across multiple substrates, indicating a common bioenergetic paradigm associated with amputation outcomes regardless of race. Direct comparisons between tissues of White and Black patients with CLI revealed hemostasis, extracellular matrix organization, platelet regulation, and vascular wall interactions to be uniquely altered in limb muscles of Black individuals. Among traditional vascular growth factor signaling targets, WTSS revealed only Tie1 to be significantly altered from White levels in Black limb muscle tissues. Quantitative reverse transcription polymerase chain reaction validation of select identified targets verified WTSS directional changes and supports reductions in MMP9 and increases in NUDT4P1 and GRIK2 as unique to limb muscles of Black patients with CLI. This represents a critical first step in better understanding the transcriptional program similarities and differences between Black and White patients in the setting of amputations related to CLI and provides a promising start for therapeutic development in this population.
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Affiliation(s)
- Zoe S Terwilliger
- Diabetes and Obesity Institute, East Carolina University, Brody Medical Center, Greenville, NC, USA.,Department of Physiology, East Carolina University, Brody Medical Center, Greenville, NC, USA
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Emma J Goldberg
- Diabetes and Obesity Institute, East Carolina University, Brody Medical Center, Greenville, NC, USA.,Department of Physiology, East Carolina University, Brody Medical Center, Greenville, NC, USA
| | - Cameron A Schmidt
- Diabetes and Obesity Institute, East Carolina University, Brody Medical Center, Greenville, NC, USA.,Department of Physiology, East Carolina University, Brody Medical Center, Greenville, NC, USA
| | - Dean J Yamaguchi
- Department of Cardiovascular Sciences, East Carolina University, Brody Medical Center, Greenville, NC, USA.,Division of Surgery, East Carolina University, Brody Medical Center, Greenville, NC, USA
| | - Reema Karnekar
- Diabetes and Obesity Institute, East Carolina University, Brody Medical Center, Greenville, NC, USA.,Department of Physiology, East Carolina University, Brody Medical Center, Greenville, NC, USA
| | - Patricia Brophy
- Diabetes and Obesity Institute, East Carolina University, Brody Medical Center, Greenville, NC, USA
| | - Thomas D Green
- Diabetes and Obesity Institute, East Carolina University, Brody Medical Center, Greenville, NC, USA.,Department of Physiology, East Carolina University, Brody Medical Center, Greenville, NC, USA
| | - Tonya N Zeczycki
- Diabetes and Obesity Institute, East Carolina University, Brody Medical Center, Greenville, NC, USA.,Department of Biochemistry, East Carolina University, Brody Medical Center, Greenville, NC, USA
| | - Feilim Mac Gabhann
- Department of Biomedical Engineering and Institute for Computational Medicine, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Brian H Annex
- Department of Medicine, Medical College of Georgia, Augusta, GA, USA.,Vascular Biology Center, Medical College of Georgia, Augusta, GA, USA
| | - Joseph M McClung
- Diabetes and Obesity Institute, East Carolina University, Brody Medical Center, Greenville, NC, USA.,Department of Physiology, East Carolina University, Brody Medical Center, Greenville, NC, USA.,Department of Cardiovascular Sciences, East Carolina University, Brody Medical Center, Greenville, NC, USA
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Salyers ZR, Coleman M, Balestrieri NP, Ryan TE. Indoxyl sulfate impairs angiogenesis via chronic aryl hydrocarbon receptor activation. Am J Physiol Cell Physiol 2021; 320:C240-C249. [PMID: 33406025 DOI: 10.1152/ajpcell.00262.2020] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Chronic kidney disease (CKD) is associated with a substantial increased risk of cardiovascular disease. There is growing evidence that uremic metabolites, which accumulate in the blood with CKD, have detrimental impacts on endothelial cell health and function. However, the molecular mechanisms by which uremic metabolites negatively impact endothelial cell biology are not fully understood. In this study, activation of the aryl hydrocarbon receptor (AHR) via indoxyl sulfate, a known uremic metabolite, was found to impair endothelial cell tube formation and proliferation but not migratory function. Moreover, aortic ring cultures treated with indoxyl sulfate also exhibited decreased sprouting and high AHR activation. Next, genetic knockdown of the AHR using shRNA was found to rescue endothelial cell tube formation, proliferation, and aortic ring sprouting. Similarly, pharmacological AHR antagonism using resveratrol and CH223191 were also found to rescue angiogenesis in cell and aortic ring cultures. Finally, a constitutively active AHR (CAAHR) vector was generated and used to confirm AHR-specific effects. Expression of the CAAHR recapitulated the impaired tube formation and proliferation in cultured endothelial cells and decreased sprouting in aortic ring cultures. Taken together, these data define the impact of AHR activation on angiogenesis and highlight the potential for therapeutic AHR antagonists, which may improve angiogenesis in the context of CKD and cardiovascular disease.
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Affiliation(s)
- Zachary R Salyers
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Madeline Coleman
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Nicholas P Balestrieri
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida.,Center for Exercise Science, University of Florida, Gainesville, Florida
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40
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Thome T, Kumar RA, Burke SK, Khattri RB, Salyers ZR, Kelley RC, Coleman MD, Christou DD, Hepple RT, Scali ST, Ferreira LF, Ryan TE. Impaired muscle mitochondrial energetics is associated with uremic metabolite accumulation in chronic kidney disease. JCI Insight 2020; 6:139826. [PMID: 33290279 PMCID: PMC7821598 DOI: 10.1172/jci.insight.139826] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 11/25/2020] [Indexed: 01/01/2023] Open
Abstract
Chronic kidney disease (CKD) causes progressive skeletal myopathy involving atrophy, weakness, and fatigue. Mitochondria have been thought to contribute to skeletal myopathy; however, the molecular mechanisms underlying muscle metabolism changes in CKD are unknown. We employed a comprehensive mitochondrial phenotyping platform to elucidate the mechanisms of skeletal muscle mitochondrial impairment in mice with adenine-induced CKD. CKD mice displayed significant reductions in mitochondrial oxidative phosphorylation (OXPHOS), which was strongly correlated with glomerular filtration rate, suggesting a link between kidney function and muscle mitochondrial health. Biochemical assays uncovered that OXPHOS dysfunction was driven by reduced activity of matrix dehydrogenases. Untargeted metabolomics analyses in skeletal muscle revealed a distinct metabolite profile in CKD muscle including accumulation of uremic toxins that strongly associated with the degree of mitochondrial impairment. Additional muscle phenotyping found CKD mice experienced muscle atrophy and increased muscle protein degradation, but only male CKD mice had lower maximal contractile force. CKD mice had morphological changes indicative of destabilization in the neuromuscular junction. This study provides the first comprehensive evaluation of mitochondrial health in murine CKD muscle to our knowledge and uncovers several unknown uremic metabolites that strongly associate with the degree of mitochondrial impairment.
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Affiliation(s)
- Trace Thome
- Department of Applied Physiology and Kinesiology, College of Health & Human Performance
| | - Ravi A Kumar
- Department of Applied Physiology and Kinesiology, College of Health & Human Performance
| | - Sarah K Burke
- Department of Physical Therapy, College of Public Health and Health Professions
| | - Ram B Khattri
- Department of Applied Physiology and Kinesiology, College of Health & Human Performance
| | - Zachary R Salyers
- Department of Applied Physiology and Kinesiology, College of Health & Human Performance
| | - Rachel C Kelley
- Department of Applied Physiology and Kinesiology, College of Health & Human Performance
| | - Madeline D Coleman
- Department of Applied Physiology and Kinesiology, College of Health & Human Performance
| | - Demetra D Christou
- Department of Applied Physiology and Kinesiology, College of Health & Human Performance.,Center for Exercise Science, College of Health & Human Performance, and
| | - Russell T Hepple
- Department of Physical Therapy, College of Public Health and Health Professions
| | - Salvatore T Scali
- Division of Vascular Surgery and Endovascular Therapy, Department of Surgery, College of Medicine, University of Florida, Gainesville, Florida, USA.,Malcom Randall Veterans Affairs Medical Center, Gainesville, Florida, USA
| | - Leonardo F Ferreira
- Department of Applied Physiology and Kinesiology, College of Health & Human Performance.,Center for Exercise Science, College of Health & Human Performance, and
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, College of Health & Human Performance.,Center for Exercise Science, College of Health & Human Performance, and
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Ryan TE, Schmidt CA, Tarpey MD, Amorese AJ, Yamaguchi DJ, Goldberg EJ, Iñigo MM, Karnekar R, O'Rourke A, Ervasti JM, Brophy P, Green TD, Neufer PD, Fisher-Wellman K, Spangenburg EE, McClung JM. PFKFB3-mediated glycolysis rescues myopathic outcomes in the ischemic limb. JCI Insight 2020; 5:139628. [PMID: 32841216 PMCID: PMC7526546 DOI: 10.1172/jci.insight.139628] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 08/19/2020] [Indexed: 12/24/2022] Open
Abstract
Compromised muscle mitochondrial metabolism is a hallmark of peripheral arterial disease, especially in patients with the most severe clinical manifestation - critical limb ischemia (CLI). We asked whether inflexibility in metabolism is critical for the development of myopathy in ischemic limb muscles. Using Polg mtDNA mutator (D257A) mice, we reveal remarkable protection from hind limb ischemia (HLI) due to a unique and beneficial adaptive enhancement of glycolytic metabolism and elevated ischemic muscle PFKFB3. Similar to the relationship between mitochondria from CLI and claudicating patient muscles, BALB/c muscle mitochondria are uniquely dysfunctional after HLI onset as compared with the C57BL/6 (BL6) parental strain. AAV-mediated overexpression of PFKFB3 in BALB/c limb muscles improved muscle contractile function and limb blood flow following HLI. Enrichment analysis of RNA sequencing data on muscle from CLI patients revealed a unique deficit in the glucose metabolism Reactome. Muscles from these patients express lower PFKFB3 protein, and their muscle progenitor cells possess decreased glycolytic flux capacity in vitro. Here, we show supplementary glycolytic flux as sufficient to protect against ischemic myopathy in instances where reduced blood flow-related mitochondrial function is compromised preclinically. Additionally, our data reveal reduced glycolytic flux as a common characteristic of the failing CLI patient limb skeletal muscle.
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Affiliation(s)
- Terence E Ryan
- East Carolina Diabetes and Obesity Institute.,Department of Physiology
| | - Cameron A Schmidt
- East Carolina Diabetes and Obesity Institute.,Department of Physiology
| | - Michael D Tarpey
- East Carolina Diabetes and Obesity Institute.,Department of Physiology
| | - Adam J Amorese
- East Carolina Diabetes and Obesity Institute.,Department of Physiology
| | - Dean J Yamaguchi
- Department of Cardiovascular Science, and.,Division of Surgery, East Carolina University, Brody School of Medicine, Greenville, North Carolina, USA
| | - Emma J Goldberg
- East Carolina Diabetes and Obesity Institute.,Department of Physiology
| | - Melissa Mr Iñigo
- East Carolina Diabetes and Obesity Institute.,Department of Physiology
| | - Reema Karnekar
- East Carolina Diabetes and Obesity Institute.,Department of Physiology
| | - Allison O'Rourke
- Department of Biochemistry, Molecular Biology and Biophysics, College of Biological Sciences, University of Minnesota, Saint Paul, Minnesota, USA
| | - James M Ervasti
- Department of Biochemistry, Molecular Biology and Biophysics, College of Biological Sciences, University of Minnesota, Saint Paul, Minnesota, USA
| | | | - Thomas D Green
- East Carolina Diabetes and Obesity Institute.,Department of Physiology
| | - P Darrell Neufer
- East Carolina Diabetes and Obesity Institute.,Department of Physiology
| | | | | | - Joseph M McClung
- East Carolina Diabetes and Obesity Institute.,Department of Physiology.,Department of Cardiovascular Science, and
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42
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Thome T, Coleman MD, Kumar RA, Salyers ZR, Skinner S, Scali ST, Ferreira LF, Ryan TE. Chronic Kidney Disease Causes Skeletal Mitochondrial Myopathy Through Disruption of the Electron Transport System. FASEB J 2020. [DOI: 10.1096/fasebj.2020.34.s1.05775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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43
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Fitzgerald LF, Thome T, Burke SK, Salyers ZR, Ryan TE, Hepple RT. Tobacco Smoke Extract Causes Mitochondrial Dysfunction Associated with Myotube Atrophy. FASEB J 2020. [DOI: 10.1096/fasebj.2020.34.s1.05409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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44
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45
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Salyers ZR, Thome T, Le D, Coleman M, Ryan TE. Skeletal muscle‐specific PFKFB3 expression rescues ischemic myopathy by enhancing glycolytic flux. FASEB J 2020. [DOI: 10.1096/fasebj.2020.34.s1.03420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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46
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Ryan TE. Assessing mitochondrial energetics in vivo with molecular detail: the best of both worlds using mitoRACE. J Physiol 2019; 597:5319-5320. [PMID: 31541453 DOI: 10.1113/jp278897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Accepted: 09/18/2019] [Indexed: 11/08/2022] Open
Affiliation(s)
- Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA.,Center for Exercise Science, University of Florida, Gainesville, FL, USA
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47
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Berru FN, Gray SE, Thome T, Kumar RA, Salyers ZR, Coleman M, Dennis Le, O'Malley K, Ferreira LF, Berceli SA, Scali ST, Ryan TE. Chronic kidney disease exacerbates ischemic limb myopathy in mice via altered mitochondrial energetics. Sci Rep 2019; 9:15547. [PMID: 31664123 PMCID: PMC6820860 DOI: 10.1038/s41598-019-52107-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 10/12/2019] [Indexed: 02/07/2023] Open
Abstract
Chronic kidney disease (CKD) substantially increases the severity of peripheral arterial disease (PAD) symptomology, however, the biological mechanisms remain unclear. The objective herein was to determine the impact of CKD on PAD pathology in mice. C57BL6/J mice were subjected to a diet-induced model of CKD by delivery of adenine for six weeks. CKD was confirmed by measurements of glomerular filtration rate, blood urea nitrogen, and kidney histopathology. Mice with CKD displayed lower muscle force production and greater ischemic lesions in the tibialis anterior muscle (78.1 ± 14.5% vs. 2.5 ± 0.5% in control mice, P < 0.0001, N = 5-10/group) and decreased myofiber size (1661 ± 134 μm2 vs. 2221 ± 100 μm2 in control mice, P < 0.01, N = 5-10/group). This skeletal myopathy occurred despite normal capillary density (516 ± 59 vs. 466 ± 45 capillaries/20x field of view) and limb perfusion. CKD mice displayed a ~50-65% reduction in muscle mitochondrial respiratory capacity in ischemic muscle, whereas control mice had normal mitochondrial function. Hydrogen peroxide emission was modestly higher in the ischemic muscle of CKD mice, which coincided with decreased oxidant buffering. Exposure of cultured myotubes to CKD serum resulted in myotube atrophy and elevated oxidative stress, which were attenuated by mitochondrial-targeted therapies. Taken together, these findings suggest that mitochondrial impairments caused by CKD contribute to the exacerbation of ischemic pathology.
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Affiliation(s)
- Fabian N Berru
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Sarah E Gray
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, FL, USA
- Malcolm Randall Veteran Affairs Medical Center, Gainesville, FL, USA
| | - Trace Thome
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Ravi A Kumar
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Zachary R Salyers
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Madeline Coleman
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Dennis Le
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Kerri O'Malley
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, FL, USA
- Malcolm Randall Veteran Affairs Medical Center, Gainesville, FL, USA
| | - Leonardo F Ferreira
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
- Center for Exercise Science, University of Florida, Gainesville, FL, USA
| | - Scott A Berceli
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, FL, USA
- Malcolm Randall Veteran Affairs Medical Center, Gainesville, FL, USA
| | - Salvatore T Scali
- Division of Vascular Surgery and Endovascular Therapy, University of Florida, Gainesville, FL, USA
- Malcolm Randall Veteran Affairs Medical Center, Gainesville, FL, USA
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA.
- Center for Exercise Science, University of Florida, Gainesville, FL, USA.
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48
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Chung S, Nelson MD, Hamaoka T, Jacobs RA, Pearson J, Subudhi AW, Jenkins NT, Bartlett MF, Fitzgerald LF, Miehm JD, Kent JA, Lucero AA, Rowlands DS, Stoner L, McCully KK, Call J, Rodriguez-Miguelez P, Harris RA, Porcelli S, Rasica L, Marzorati M, Quaresima V, Ryan TE, Vernillo G, Millet GP, Malatesta D, Millet GY, Zuo L, Chuang CC. Commentaries on Viewpoint: Principles, insights, and potential pitfalls of the noninvasive determination of muscle oxidative capacity by near-infrared spectroscopy. J Appl Physiol (1985) 2019; 124:249-255. [PMID: 29364790 DOI: 10.1152/japplphysiol.00857.2017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | - Lee Stoner
- Massey University,University of North Carolina at Chapel Hill
| | | | | | | | | | | | - Letizia Rasica
- National Research Council, Italy,University of Milan, Italy
| | | | | | | | | | | | | | | | - Li Zuo
- The Ohio State University College of Medicine
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49
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Verkerke ARP, Ferrara PJ, Lin CT, Johnson JM, Ryan TE, Maschek JA, Eshima H, Paran CW, Laing BT, Siripoksup P, Tippetts TS, Wentzler EJ, Huang H, Spangenburg EE, Brault JJ, Villanueva CJ, Summers SA, Holland WL, Cox JE, Vance DE, Neufer PD, Funai K. Phospholipid methylation regulates muscle metabolic rate through Ca 2+ transport efficiency. Nat Metab 2019; 1:876-885. [PMID: 32405618 PMCID: PMC7218817 DOI: 10.1038/s42255-019-0111-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The biophysical environment of membrane phospholipids affects structure, function, and stability of membrane-bound proteins.1,2 Obesity can disrupt membrane lipids, and in particular, alter the activity of sarco/endoplasmic reticulum (ER/SR) Ca2+-ATPase (SERCA) to affect cellular metabolism.3-5 Recent evidence suggests that transport efficiency (Ca2+ uptake / ATP hydrolysis) of skeletal muscle SERCA can be uncoupled to increase energy expenditure and protect mice from diet-induced obesity.6,7 In isolated SR vesicles, membrane phospholipid composition is known to modulate SERCA efficiency.8-11 Here we show that skeletal muscle SR phospholipids can be altered to decrease SERCA efficiency and increase whole-body metabolic rate. The absence of skeletal muscle phosphatidylethanolamine (PE) methyltransferase (PEMT) promotes an increase in skeletal muscle and whole-body metabolic rate to protect mice from diet-induced obesity. The elevation in metabolic rate is caused by a decrease in SERCA Ca2+-transport efficiency, whereas mitochondrial uncoupling is unaffected. Our findings support the hypothesis that skeletal muscle energy efficiency can be reduced to promote protection from obesity.
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Affiliation(s)
- Anthony R P Verkerke
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Nutrition & Integrative Physiology, University of Utah, Salt Lake City, UT, USA
| | - Patrick J Ferrara
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Nutrition & Integrative Physiology, University of Utah, Salt Lake City, UT, USA
| | - Chien-Te Lin
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
| | - Jordan M Johnson
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Nutrition & Integrative Physiology, University of Utah, Salt Lake City, UT, USA
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - J Alan Maschek
- Metabolomics Core Research Facility, University of Utah, Salt Lake City, UT, USA
| | - Hiroaki Eshima
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
| | - Christopher W Paran
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
| | - Brenton T Laing
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
| | - Piyarat Siripoksup
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Physical Therapy & Athletic Training, University of Utah, Salt Lake City, UT, USA
| | - Trevor S Tippetts
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Nutrition & Integrative Physiology, University of Utah, Salt Lake City, UT, USA
| | - Edward J Wentzler
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
| | - Hu Huang
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
| | - Espen E Spangenburg
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
| | - Jeffrey J Brault
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
| | - Claudio J Villanueva
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Biochemistry, University of Utah, Salt Lake City, UT, USA
| | - Scott A Summers
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Nutrition & Integrative Physiology, University of Utah, Salt Lake City, UT, USA
- Molecular Medicine Program, University of Utah, Salt Lake City, UT, USA
| | - William L Holland
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Nutrition & Integrative Physiology, University of Utah, Salt Lake City, UT, USA
- Molecular Medicine Program, University of Utah, Salt Lake City, UT, USA
| | - James E Cox
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Metabolomics Core Research Facility, University of Utah, Salt Lake City, UT, USA
- Department of Biochemistry, University of Utah, Salt Lake City, UT, USA
| | - Dennis E Vance
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
| | - P Darrell Neufer
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
| | - Katsuhiko Funai
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA.
- Department of Nutrition & Integrative Physiology, University of Utah, Salt Lake City, UT, USA.
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA.
- Department of Physical Therapy & Athletic Training, University of Utah, Salt Lake City, UT, USA.
- Molecular Medicine Program, University of Utah, Salt Lake City, UT, USA.
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50
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Heden TD, Johnson JM, Ferrara PJ, Eshima H, Verkerke ARP, Wentzler EJ, Siripoksup P, Narowski TM, Coleman CB, Lin CT, Ryan TE, Reidy PT, de Castro Brás LE, Karner CM, Burant CF, Maschek JA, Cox JE, Mashek DG, Kardon G, Boudina S, Zeczycki TN, Rutter J, Shaikh SR, Vance JE, Drummond MJ, Neufer PD, Funai K. Mitochondrial PE potentiates respiratory enzymes to amplify skeletal muscle aerobic capacity. Sci Adv 2019; 5:eaax8352. [PMID: 31535029 PMCID: PMC6739096 DOI: 10.1126/sciadv.aax8352] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 08/15/2019] [Indexed: 05/08/2023]
Abstract
Exercise capacity is a strong predictor of all-cause mortality. Skeletal muscle mitochondrial respiratory capacity, its biggest contributor, adapts robustly to changes in energy demands induced by contractile activity. While transcriptional regulation of mitochondrial enzymes has been extensively studied, there is limited information on how mitochondrial membrane lipids are regulated. Here, we show that exercise training or muscle disuse alters mitochondrial membrane phospholipids including phosphatidylethanolamine (PE). Addition of PE promoted, whereas removal of PE diminished, mitochondrial respiratory capacity. Unexpectedly, skeletal muscle-specific inhibition of mitochondria-autonomous synthesis of PE caused respiratory failure because of metabolic insults in the diaphragm muscle. While mitochondrial PE deficiency coincided with increased oxidative stress, neutralization of the latter did not rescue lethality. These findings highlight the previously underappreciated role of mitochondrial membrane phospholipids in dynamically controlling skeletal muscle energetics and function.
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Affiliation(s)
- Timothy D. Heden
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
- Department of Kinesiology, East Carolina University, Greenville, NC, USA
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN, USA
| | - Jordan M. Johnson
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
- Department of Kinesiology, East Carolina University, Greenville, NC, USA
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, USA
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, UT, USA
| | - Patrick J. Ferrara
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
- Department of Kinesiology, East Carolina University, Greenville, NC, USA
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, USA
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, UT, USA
| | - Hiroaki Eshima
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
| | - Anthony R. P. Verkerke
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
- Department of Kinesiology, East Carolina University, Greenville, NC, USA
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, USA
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, UT, USA
| | - Edward J. Wentzler
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
- Department of Kinesiology, East Carolina University, Greenville, NC, USA
| | - Piyarat Siripoksup
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, UT, USA
| | - Tara M. Narowski
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
- Department of Kinesiology, East Carolina University, Greenville, NC, USA
| | - Chanel B. Coleman
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
- Department of Kinesiology, East Carolina University, Greenville, NC, USA
| | - Chien-Te Lin
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
- Department of Physiology, East Carolina University, Greenville, NC, USA
| | - Terence E. Ryan
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
- Department of Physiology, East Carolina University, Greenville, NC, USA
- Department of Applied Physiology & Kinesiology, University of Florida, Gainesville, FL, USA
| | - Paul T. Reidy
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, UT, USA
| | | | - Courtney M. Karner
- Department of Orthopedic Surgery & Department of Cell Biology, Duke University School of Medicine, Durham, NC, USA
| | - Charles F. Burant
- Michigan Regional Comprehensive Metabolomics Resource Core, University of Michigan, Ann Arbor, MI, USA
| | - J. Alan Maschek
- Metabolomics Core Research Facility, University of Utah, Salt Lake City, UT, USA
| | - James E. Cox
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Metabolomics Core Research Facility, University of Utah, Salt Lake City, UT, USA
- Department of Biochemistry, University of Utah, Salt Lake City, UT, USA
| | - Douglas G. Mashek
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN, USA
| | - Gabrielle Kardon
- Department of Human Genetics, University of Utah, Salt Lake City, UT, USA
| | - Sihem Boudina
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, USA
- Molecular Medicine Program, University of Utah, Salt Lake City, UT, USA
| | - Tonya N. Zeczycki
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
- Department of Biochemistry and Molecular Biology, East Carolina University, Greenville, NC, USA
| | - Jared Rutter
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Biochemistry, University of Utah, Salt Lake City, UT, USA
| | - Saame Raza Shaikh
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
- Department of Biochemistry and Molecular Biology, East Carolina University, Greenville, NC, USA
- Department of Nutrition, University of North Carolina, Chapel Hill, NC, USA
| | - Jean E. Vance
- Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
| | - Micah J. Drummond
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, USA
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, UT, USA
- Molecular Medicine Program, University of Utah, Salt Lake City, UT, USA
| | - P. Darrell Neufer
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
- Department of Kinesiology, East Carolina University, Greenville, NC, USA
- Department of Physiology, East Carolina University, Greenville, NC, USA
| | - Katsuhiko Funai
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
- Department of Kinesiology, East Carolina University, Greenville, NC, USA
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, USA
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, UT, USA
- Department of Physiology, East Carolina University, Greenville, NC, USA
- Molecular Medicine Program, University of Utah, Salt Lake City, UT, USA
- Corresponding author.
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