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Jama A, Alshudukhi AA, Burke S, Dong L, Kamau JK, Morris B, Alkhomsi IA, Finck BN, Voss AA, Ren H. Exploring lipin1 as a promising therapeutic target for the treatment of Duchenne muscular dystrophy. J Transl Med 2024; 22:664. [PMID: 39014470 PMCID: PMC11253568 DOI: 10.1186/s12967-024-05494-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 07/10/2024] [Indexed: 07/18/2024] Open
Abstract
BACKGROUND Duchenne muscular dystrophy (DMD) is a progressive and devastating muscle disease, resulting from the absence of dystrophin. This leads to cell membrane instability, susceptibility to contraction-induced muscle damage, subsequent muscle degeneration, and eventually disability and early death of patients. Currently, there is no cure for DMD. Our recent studies identified that lipin1 plays a critical role in maintaining myofiber stability and integrity. However, lipin1 gene expression levels are dramatically reduced in the skeletal muscles of DMD patients and mdx mice. METHODS To identify whether increased lipin1 expression could prevent dystrophic pathology, we employed unique muscle-specific mdx:lipin1 transgenic (mdx:lipin1Tg/0) mice in which lipin1 was restored in the dystrophic muscle of mdx mice, intramuscular gene delivery, as well as cell culture system. RESULTS We found that increased lipin1 expression suppressed muscle degeneration and inflammation, reduced fibrosis, strengthened membrane integrity, and resulted in improved muscle contractile and lengthening force, and muscle performance in mdx:lipin1Tg/0 compared to mdx mice. To confirm the role of lipin1 in dystrophic muscle, we then administered AAV1-lipin1 via intramuscular injection in mdx mice. Consistently, lipin1 restoration inhibited myofiber necroptosis and lessened muscle degeneration. Using a cell culture system, we further found that differentiated primary mdx myoblasts had elevated expression levels of necroptotic markers and medium creatine kinase (CK), which could be a result of sarcolemmal damage. Most importantly, increased lipin1 expression levels in differentiated myoblasts from mdx:lipin1Tg/0 mice substantially inhibited the elevation of necroptotic markers and medium CK levels. CONCLUSIONS Overall, our data suggest that lipin1 is a promising therapeutic target for the treatment of dystrophic muscles.
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Affiliation(s)
- Abdulrahman Jama
- Department of Biochemistry and Molecular Biology, Wright State University, 3640 Colonel Glenn Hwy., Dayton, OH, 45435-0001, USA
| | - Abdullah A Alshudukhi
- Department of Biochemistry and Molecular Biology, Wright State University, 3640 Colonel Glenn Hwy., Dayton, OH, 45435-0001, USA
- Department of Medical Laboratories, College of Applied Medical Sciences, Qassim University, Buraydah, Saudi Arabia
| | - Steve Burke
- Department of Biological Sciences, Wright State University, Dayton, OH, USA
| | - Lixin Dong
- Mumetel LLC, University Technology Park at IIT, Chicago, IL, USA
| | - John Karanja Kamau
- Department of Biochemistry and Molecular Biology, Wright State University, 3640 Colonel Glenn Hwy., Dayton, OH, 45435-0001, USA
| | - Brooklyn Morris
- Department of Biochemistry and Molecular Biology, Wright State University, 3640 Colonel Glenn Hwy., Dayton, OH, 45435-0001, USA
| | - Ibrahim A Alkhomsi
- Department of Biochemistry and Molecular Biology, Wright State University, 3640 Colonel Glenn Hwy., Dayton, OH, 45435-0001, USA
| | - Brian N Finck
- Division of Geriatrics & Nutritional Science, Washington University School of Medicine, St. Louis, USA
| | - Andrew Alvin Voss
- Department of Biological Sciences, Wright State University, Dayton, OH, USA
| | - Hongmei Ren
- Department of Biochemistry and Molecular Biology, Wright State University, 3640 Colonel Glenn Hwy., Dayton, OH, 45435-0001, USA.
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2
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López-Dávila AJ, Lomonte B, Gutiérrez JM. Alterations of the skeletal muscle contractile apparatus in necrosis induced by myotoxic snake venom phospholipases A 2: a mini-review. J Muscle Res Cell Motil 2024; 45:69-77. [PMID: 38063951 PMCID: PMC11096208 DOI: 10.1007/s10974-023-09662-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Accepted: 11/07/2023] [Indexed: 05/16/2024]
Abstract
Skeletal muscle necrosis is a common clinical manifestation of snakebite envenoming. The predominant myotoxic components in snake venoms are catalytically-active phospholipases A2 (PLA2) and PLA2 homologs devoid of enzymatic activity, which have been used as models to investigate various aspects of muscle degeneration. This review addresses the changes in the contractile apparatus of skeletal muscle induced by these toxins. Myotoxic components initially disrupt the integrity of sarcolemma, generating a calcium influx that causes various degenerative events, including hypercontraction of myofilaments. There is removal of specific sarcomeric proteins, owing to the hydrolytic action of muscle calpains and proteinases from invading inflammatory cells, causing an initial redistribution followed by widespread degradation of myofibrillar material. Experiments using skinned cardiomyocytes and skeletal muscle fibers show that these myotoxins do not directly affect the contractile apparatus, implying that hypercontraction is due to cytosolic calcium increase secondary to sarcolemmal damage. Such drastic hypercontraction may contribute to muscle damage by generating mechanical stress and further sarcolemmal damage.
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Affiliation(s)
- Alfredo Jesús López-Dávila
- Institute of Molecular and Cell Physiology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany.
| | - Bruno Lomonte
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, 11501, Costa Rica
| | - José María Gutiérrez
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, 11501, Costa Rica
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Mitochondrial Lipids: From Membrane Organization to Apoptotic Facilitation. Int J Mol Sci 2022; 23:ijms23073738. [PMID: 35409107 PMCID: PMC8998749 DOI: 10.3390/ijms23073738] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 03/23/2022] [Accepted: 03/25/2022] [Indexed: 02/04/2023] Open
Abstract
Mitochondria are the most complex intracellular organelles, their function combining energy production for survival and apoptosis facilitation for death. Such a multivariate physiology is structurally and functionally reflected upon their membrane configuration and lipid composition. Mitochondrial double membrane lipids, with cardiolipin as the protagonist, show an impressive level of complexity that is mandatory for maintenance of mitochondrial health and protection from apoptosis. Given that lipidomics is an emerging field in cancer research and that mitochondria are the organelles with the most important role in malignant maintenance knowledge of the mitochondrial membrane, lipid physiology in health is mandatory. In this review, we will thus describe the delicate nature of the healthy mitochondrial double membrane and its role in apoptosis. Emphasis will be given on mitochondrial membrane lipids and the changes that they undergo during apoptosis induction and progression.
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4
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Balakrishnan R, Mareedu S, Babu GJ. Reducing sarcolipin expression improves muscle metabolism in mdx mice. Am J Physiol Cell Physiol 2022; 322:C260-C274. [PMID: 34986021 PMCID: PMC8816636 DOI: 10.1152/ajpcell.00125.2021] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Duchenne muscular dystrophy (DMD) is an inherited muscle wasting disease. Metabolic impairments and oxidative stress are major secondary mechanisms that severely worsen muscle function in DMD. Here, we sought to determine whether germline reduction or ablation of sarcolipin (SLN), an inhibitor of sarco/endoplasmic reticulum (SR) Ca2+ ATPase (SERCA), improves muscle metabolism and ameliorates muscle pathology in the mdx mouse model of DMD. Glucose and insulin tolerance tests show that glucose clearance rate and insulin sensitivity were improved in the SLN haploinsufficient mdx (mdx:sln+/-) and SLN-deficient mdx (mdx:sln-/-) mice. The histopathological analysis shows that fibrosis and necrosis were significantly reduced in muscles of mdx:sln+/- and mdx:sln-/- mice. SR Ca2+ uptake, mitochondrial complex protein levels, complex activities, mitochondrial Ca2+ uptake and release, and mitochondrial metabolism were significantly improved, and lipid peroxidation and protein carbonylation were reduced in the muscles of mdx:sln+/- and mdx:sln-/- mice. These data demonstrate that reduction or ablation of SLN expression can improve muscle metabolism, reduce oxidative stress, decrease muscle pathology, and protects the mdx mice from glucose intolerance.
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Affiliation(s)
- Rekha Balakrishnan
- Department of Cell Biology and Molecular Medicine, Rutgers, New Jersey Medical School, Newark, New Jersey
| | - Satvik Mareedu
- Department of Cell Biology and Molecular Medicine, Rutgers, New Jersey Medical School, Newark, New Jersey
| | - Gopal J. Babu
- Department of Cell Biology and Molecular Medicine, Rutgers, New Jersey Medical School, Newark, New Jersey
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5
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Valentine WJ, Mostafa SA, Tokuoka SM, Hamano F, Inagaki NF, Nordin JZ, Motohashi N, Kita Y, Aoki Y, Shimizu T, Shindou H. Lipidomic Analyses Reveal Specific Alterations of Phosphatidylcholine in Dystrophic Mdx Muscle. Front Physiol 2022; 12:698166. [PMID: 35095541 PMCID: PMC8791236 DOI: 10.3389/fphys.2021.698166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 12/06/2021] [Indexed: 11/13/2022] Open
Abstract
In Duchenne muscular dystrophy (DMD), lack of dystrophin increases the permeability of myofiber plasma membranes to ions and larger macromolecules, disrupting calcium signaling and leading to progressive muscle wasting. Although the biological origin and meaning are unclear, alterations of phosphatidylcholine (PC) are reported in affected skeletal muscles of patients with DMD that may include higher levels of fatty acid (FA) 18:1 chains and lower levels of FA 18:2 chains, possibly reflected in relatively high levels of PC 34:1 (with 16:0_18:1 chain sets) and low levels of PC 34:2 (with 16:0_18:2 chain sets). Similar PC alterations have been reported to occur in the mdx mouse model of DMD. However, altered ratios of PC 34:1 to PC 34:2 have been variably reported, and we also observed that PC 34:2 levels were nearly equally elevated as PC 34:1 in the affected mdx muscles. We hypothesized that experimental factors that often varied between studies; including muscle types sampled, mouse ages, and mouse diets; may strongly impact the PC alterations detected in dystrophic muscle of mdx mice, especially the PC 34:1 to PC 34:2 ratios. In order to test our hypothesis, we performed comprehensive lipidomic analyses of PC and phosphatidylethanolamine (PE) in several muscles (extensor digitorum longus, gastrocnemius, and soleus) and determined the mdx-specific alterations. The alterations in PC 34:1 and PC 34:2 were closely monitored from the neonate period to the adult, and also in mice raised on several diets that varied in their fats. PC 34:1 was naturally high in neonate’s muscle and decreased until age ∼3-weeks (disease onset age), and thereafter remained low in WT muscles but was higher in regenerated mdx muscles. Among the muscle types, soleus showed a distinctive phospholipid pattern with early and diminished mdx alterations. Diet was a major factor to impact PC 34:1/PC 34:2 ratios because mdx-specific alterations of PC 34:2 but not PC 34:1 were strictly dependent on diet. Our study identifies high PC 34:1 as a consistent biochemical feature of regenerated mdx-muscle and indicates nutritional approaches are also effective to modify the phospholipid compositions.
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Affiliation(s)
- William J. Valentine
- Department of Molecular Therapy, National Center for Neurology and Psychiatry (NCNP), National Institute of Neuroscience, Kodaira, Tokyo, Japan
- Department of Lipid Signaling, National Center for Global Health and Medicine (NCGM), Shinjuku-ku, Japan
- *Correspondence: William J. Valentine,
| | - Sherif A. Mostafa
- Department of Lipid Signaling, National Center for Global Health and Medicine (NCGM), Shinjuku-ku, Japan
- Weill Cornell Medicine—Qatar, Doha, Qatar
| | - Suzumi M. Tokuoka
- Department of Lipidomics, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Japan
| | - Fumie Hamano
- Department of Lipid Signaling, National Center for Global Health and Medicine (NCGM), Shinjuku-ku, Japan
- Life Sciences Core Facility, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Japan
| | - Natsuko F. Inagaki
- Department of Lipid Signaling, National Center for Global Health and Medicine (NCGM), Shinjuku-ku, Japan
| | - Joel Z. Nordin
- Department of Molecular Therapy, National Center for Neurology and Psychiatry (NCNP), National Institute of Neuroscience, Kodaira, Tokyo, Japan
- Department of Laboratory Medicine, Centre for Biomolecular and Cellular Medicine, Karolinska Institutet, Huddinge, Sweden
| | - Norio Motohashi
- Department of Molecular Therapy, National Center for Neurology and Psychiatry (NCNP), National Institute of Neuroscience, Kodaira, Tokyo, Japan
| | - Yoshihiro Kita
- Life Sciences Core Facility, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Japan
| | - Yoshitsugu Aoki
- Department of Molecular Therapy, National Center for Neurology and Psychiatry (NCNP), National Institute of Neuroscience, Kodaira, Tokyo, Japan
- Yoshitsugu Aoki,
| | - Takao Shimizu
- Department of Lipid Signaling, National Center for Global Health and Medicine (NCGM), Shinjuku-ku, Japan
| | - Hideo Shindou
- Department of Lipid Signaling, National Center for Global Health and Medicine (NCGM), Shinjuku-ku, Japan
- Department of Medical Lipid Science, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Japan
- Hideo Shindou,
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6
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Gilloteaux J, Nicaise C, Sprimont L, Bissler J, Finkelstein JA, Payne WR. Leptin receptor defect with diabetes causes skeletal muscle atrophy in female obese Zucker rats where peculiar depots networked with mitochondrial damages. Ultrastruct Pathol 2021; 45:346-375. [PMID: 34743665 DOI: 10.1080/01913123.2021.1983099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Tibialis anterior muscles of 45-week-old female obese Zucker rats with defective leptin receptor and non-insulin dependent diabetes mellitus (NIDDM) showed a significative atrophy compared to lean muscles, based on histochemical-stained section's measurements in the sequence: oxidative slow twitch (SO, type I) < oxidative fast twitch (FOG, type IIa) < fast glycolytic (FG, type IIb). Both oxidative fiber's outskirts resembled 'ragged' fibers and, in these zones, ultrastructure revealed small clusters of endoplasm-like reticulum filled with unidentified electron contrasted compounds, contiguous and continuous with adjacent mitochondria envelope. The linings appeared crenated stabbed by circular patterns resembling those found of ceramides. The same fibers contained scattered degraded mitochondria that tethered electron contrasted droplets favoring larger depots while mitoptosis were widespread in FG fibers. Based on other interdisciplinary investigations on the lipid depots of diabetes 2 muscles made us to propose these accumulated contrasted contents to be made of peculiar lipids, including acyl-ceramides, as those were only found while diabetes 2 progresses in aging obese rats. These could interfere in NIDDM with mitochondrial oxidative energetic demands and muscle functions.
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Affiliation(s)
- Jacques Gilloteaux
- Department of Anatomical Sciences, St George's University School of Medicine, K B Taylor Global Scholar's Program at the University of Northumbria, School of Health and Life Sciences, Newcastle upon Tyne, UK.,Unité de Recherches de Physiologie Moleculaire (URPHyM) - Narilis, Département de Médecine, Université de Namur, Namur, Belgium.,Department of Anatomy, Northeast Ohio Medical University (Neomed), Rootstown, OH, USA
| | - Charles Nicaise
- Unité de Recherches de Physiologie Moleculaire (URPHyM) - Narilis, Département de Médecine, Université de Namur, Namur, Belgium
| | - Lindsay Sprimont
- Unité de Recherches de Physiologie Moleculaire (URPHyM) - Narilis, Département de Médecine, Université de Namur, Namur, Belgium
| | - John Bissler
- Department of Anatomy, Northeast Ohio Medical University (Neomed), Rootstown, OH, USA.,Division of Nephrology at St. Jude Children's Research Hospital and Le Bonheur Children's Hospital, The University of Tennessee Health Science Center, Memphis, TN, USA
| | - Judith A Finkelstein
- Department of Anatomy, Northeast Ohio Medical University (Neomed), Rootstown, OH, USA
| | - Warren R Payne
- Institute for Sport and Health, Footscray Park Campus, Victoria University, Melbourne, VIC, Australia
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7
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Bucher M, Montaniel KRC, Myatt L, Weintraub S, Tavori H, Maloyan A. Dyslipidemia, insulin resistance, and impairment of placental metabolism in the offspring of obese mothers. J Dev Orig Health Dis 2021; 12:738-747. [PMID: 33185172 PMCID: PMC8606174 DOI: 10.1017/s2040174420001026] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Obesity is a chronic condition associated with dyslipidemia and insulin resistance. Here, we show that the offspring of obese mothers are dyslipidemic and insulin resistant from the outset.Maternal and cord blood and placental tissues were collected following C-section at term. Patients were grouped as being normal weight (NW, BMI = 18-24.9) or obese (OB, BMI ≥ 30), and separated by fetal sex. We measured plasma lipids, insulin, and glucose in maternal and cord blood. Insulin resistance was quantified using the HOMA-IR. Placental markers of lipid and energy metabolism and relevant metabolites were measured by western blot and metabolomics, respectively.For OB women, total cholesterol was decreased in both maternal and cord blood, while HDL was decreased only in cord blood, independent of sex. In babies born to OB women, cord blood insulin and insulin resistance were increased. Placental protein expression of the energy and lipid metabolism regulators PGC1α, and SIRT3, ERRα, CPT1α, and CPT2 decreased with maternal obesity in a sex-dependent manner (P < 0.05). Metabolomics showed lower levels of acylcarnitines C16:0, C18:2, and C20:4 in OB women's placentas, suggesting a decrease in β-oxidation. Glutamine, glutamate, alpha-ketoglutarate (αKG), and 2-hydroxyglutarate (2-HG) were increased, and the glutamine-to-glutamate ratio decreased (P < 0.05), in OB placentas, suggesting induction of glutamate into αKG conversion to maintain a normal metabolic flux.Newly-born offspring of obese mothers begin their lives dyslipidemic and insulin resistant. If not inherited genetically, such major metabolic perturbations might be explained by abnormal placental metabolism with potential long-term adverse consequences for the offspring's health and wellbeing.
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Affiliation(s)
- Matthew Bucher
- Knight Cardiovascular Institute, School of Medicine, Oregon Health & Science University, Portland, OR, USA
- Department of OB/GYN, Oregon Health & Science University, Portland, OR, USA
| | - Kim Ramil C. Montaniel
- Knight Cardiovascular Institute, School of Medicine, Oregon Health & Science University, Portland, OR, USA
- The Graduate Program in Biomedical Sciences (PBMS), Oregon Health & Science University, Portland, OR, USA
| | - Leslie Myatt
- Department of OB/GYN, Oregon Health & Science University, Portland, OR, USA
| | - Susan Weintraub
- Department of Biochemistry, The Metabolomics Core Facility, Institutional Mass Spectrometry Laboratory, University of Texas Health, San Antonio, TX, USA
| | - Hagai Tavori
- Knight Cardiovascular Institute, School of Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Alina Maloyan
- Knight Cardiovascular Institute, School of Medicine, Oregon Health & Science University, Portland, OR, USA
- The Graduate Program in Biomedical Sciences (PBMS), Oregon Health & Science University, Portland, OR, USA
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8
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Ferrara PJ, Verkerke ARP, Maschek JA, Shahtout JL, Siripoksup P, Eshima H, Johnson JM, Petrocelli JJ, Mahmassani ZS, Green TD, McClung JM, Cox JE, Drummond MJ, Funai K. Low lysophosphatidylcholine induces skeletal muscle myopathy that is aggravated by high-fat diet feeding. FASEB J 2021; 35:e21867. [PMID: 34499764 DOI: 10.1096/fj.202101104r] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 07/27/2021] [Accepted: 08/09/2021] [Indexed: 12/25/2022]
Abstract
Obesity alters skeletal muscle lipidome and promotes myopathy, but it is unknown whether aberrant muscle lipidome contributes to the reduction in skeletal muscle contractile force-generating capacity. Comprehensive lipidomic analyses of mouse skeletal muscle revealed a very strong positive correlation between the abundance of lysophosphatidylcholine (lyso-PC), a class of lipids that is known to be downregulated with obesity, with maximal tetanic force production. The level of lyso-PC is regulated primarily by lyso-PC acyltransferase 3 (LPCAT3), which acylates lyso-PC to form phosphatidylcholine. Tamoxifen-inducible skeletal muscle-specific overexpression of LPCAT3 (LPCAT3-MKI) was sufficient to reduce muscle lyso-PC content in both standard chow diet- and high-fat diet (HFD)-fed conditions. Strikingly, the assessment of skeletal muscle force-generating capacity ex vivo revealed that muscles from LPCAT3-MKI mice were weaker regardless of diet. Defects in force production were more apparent in HFD-fed condition, where tetanic force production was 40% lower in muscles from LPCAT3-MKI compared to that of control mice. These observations were partly explained by reductions in the cross-sectional area in type IIa and IIx fibers, and signs of muscle edema in the absence of fibrosis. Future studies will pursue the mechanism by which LPCAT3 may alter protein turnover to promote myopathy.
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Affiliation(s)
- Patrick J Ferrara
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, USA.,East Carolina Diabetes & Obesity Institute, East Carolina University, Greenville, North Carolina, USA.,Molecular Medicine Program, University of Utah, Salt Lake City, Utah, USA
| | - Anthony R P Verkerke
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, USA.,East Carolina Diabetes & Obesity Institute, East Carolina University, Greenville, North Carolina, USA
| | - J Alan Maschek
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Metabolomics, Mass Spectrometry, and Proteomics Core, University of Utah, Salt Lake City, Utah, USA
| | - Justin L Shahtout
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah, USA
| | - Piyarat Siripoksup
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah, USA
| | - Hiroaki Eshima
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Department of International Tourism, Nagasaki International University, Sasebo, Japan
| | - Jordan M Johnson
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, USA.,East Carolina Diabetes & Obesity Institute, East Carolina University, Greenville, North Carolina, USA
| | - Jonathan J Petrocelli
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah, USA
| | - Ziad S Mahmassani
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah, USA
| | - Thomas D Green
- East Carolina Diabetes & Obesity Institute, East Carolina University, Greenville, North Carolina, USA
| | - Joseph M McClung
- East Carolina Diabetes & Obesity Institute, East Carolina University, Greenville, North Carolina, USA
| | - James E Cox
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Metabolomics, Mass Spectrometry, and Proteomics Core, University of Utah, Salt Lake City, Utah, USA.,Department of Biochemistry, University of Utah, Salt Lake City, Utah, USA
| | - Micah J Drummond
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Molecular Medicine Program, University of Utah, Salt Lake City, Utah, USA.,Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah, USA
| | - Katsuhiko Funai
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, USA.,East Carolina Diabetes & Obesity Institute, East Carolina University, Greenville, North Carolina, USA.,Molecular Medicine Program, University of Utah, Salt Lake City, Utah, USA.,Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah, USA
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9
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Tang H, Cui M, Han M. Fatty acids impact sarcomere integrity through myristoylation and ER homeostasis. Cell Rep 2021; 36:109539. [PMID: 34407398 PMCID: PMC8404530 DOI: 10.1016/j.celrep.2021.109539] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 06/04/2021] [Accepted: 07/26/2021] [Indexed: 01/01/2023] Open
Abstract
Decreased ability to maintain tissue integrity is critically involved in aging and degenerative diseases. Fatty acid (FA) metabolism has a profound impact on animal development and tissue maintenance, but our understanding of the underlying mechanisms is limited. We investigated whether and how FA abundance affects muscle integrity using Caenorhabditis elegans. We show that reducing the overall FA level by blocking FA biosynthesis or inhibiting protein myristoylation leads to disorganization of sarcomere structure and adult-onset paralysis. Further analysis indicates that myristoylation of two ARF guanosine triphosphatases (GTPases) critically mediates the effect of FA deficiency on sarcomere integrity through inducing endoplasmic reticulum (ER) stress and ER unfolded protein response (UPRER), which in turn leads to reduction of the level of sarcomere component PINCH and myosin disorganization. We thus present a mechanism that links FA signal, protein myristoylation, and ER homeostasis with muscle integrity, which provides valuable insights into the regulatory role of nutrients and ER homeostasis in muscle maintenance.
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Affiliation(s)
- Hongyun Tang
- Department of MCDB, University of Colorado Boulder, Boulder, CO 80309, USA; Key Laboratory of Growth Regulation and Transformation Research of Zhejiang Province, School of Life Sciences, Westlake University, Hangzhou 310024, Zhejiang Province, China; Institute of Biology, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China
| | - Mingxue Cui
- Department of MCDB, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Min Han
- Department of MCDB, University of Colorado Boulder, Boulder, CO 80309, USA.
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10
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Influence of Disorders of Fatty Acid Metabolism, Arterial Wall Hypoxia, and Intraplaque Hemorrhages on Lipid Accumulation in Atherosclerotic Vessels. ACTA BIOMEDICA SCIENTIFICA 2021. [DOI: 10.29413/abs.2021-6.2.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The review describes a number of competing views on the main causes of cholesterol accumulation in atherosclerotic vessels. On the one hand, unregulated cholesterol influx into arterial intima is primarily related to the increasing proportion of atherogenic lipoproteins in the lipoprotein spectrum of blood. On the other hand, the leading role in this process is assigned to the increased permeability of endothelium for atherogenic lipoproteins. The increased ability of arterial intima connective tissue to bind atherogenic blood lipoproteins is also considered to be the leading cause of cholesterol accumulation in the vascular wall. The key role in cholesterol accumulation is also assigned to unregulated (by a negative feedback mechanism) absorption of atherogenic lipoproteins by foam cells. It is suggested that the main cause of abundant cholesterol accumulation in atherosclerotic vessels is significant inflow of this lipid into the vascular wall during vasa vasorum hemorrhages.The article also provides arguments, according to which disorder of fatty acid metabolism in arterial wall cells can initiate accumulation of neutral lipids in them, contribute to the inflammation and negatively affect the mechanical conditions around the vasa vasorum in the arterial walls. As a result, the impact of pulse waves on the luminal surface of the arteries will lead to frequent hemorrhages of these microvessels. At the same time, adaptive-muscular intima hyperplasia, which develops in arterial channel areas subjected to high hemodynamic loads, causes local hypoxia in a vascular wall. As a result, arterial wall cells undergo even more severe lipid transformation. Hypoxia also stimulates vascularization of the arterial wall, which contributes to hemorrhages in it. With hemorrhages, free erythrocyte cholesterol penetrates into the forming atherosclerotic plaque, a part of this cholesterol forms cholesterol esters inside the arterial cells. The saturation of erythrocyte membranes with this lipid in conditions of hypercholesterolemia and atherogenic dyslipoproteinemia contributes to the process of cholesterol accumulation in arteries.
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11
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Grande V, Hathazi D, O'Connor E, Marteau T, Schara-Schmidt U, Hentschel A, Gourdon G, Nikolenko N, Lochmüller H, Roos A. Dysregulation of GSK3β-Target Proteins in Skin Fibroblasts of Myotonic Dystrophy Type 1 (DM1) Patients. J Neuromuscul Dis 2021; 8:603-619. [PMID: 33682722 DOI: 10.3233/jnd-200558] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Myotonic dystrophy type 1 (DM1) is the most common monogenetic muscular disorder of adulthood. This multisystemic disease is caused by CTG repeat expansion in the 3'-untranslated region of the DM1 protein kinase gene called DMPK. DMPK encodes a myosin kinase expressed in skeletal muscle cells and other cellular populations such as smooth muscle cells, neurons and fibroblasts. The resultant expanded (CUG)n RNA transcripts sequester RNA binding factors leading to ubiquitous and persistent splicing deregulation. The accumulation of mutant CUG repeats is linked to increased activity of glycogen synthase kinase 3 beta (GSK3β), a highly conserved and ubiquitous serine/threonine kinase with functions in pathways regulating inflammation, metabolism, oncogenesis, neurogenesis and myogenesis. As GSK3β-inhibition ameliorates defects in myogenesis, muscle strength and myotonia in a DM1 mouse model, this kinase represents a key player of DM1 pathobiochemistry and constitutes a promising therapeutic target. To better characterise DM1 patients, and monitor treatment responses, we aimed to define a set of robust disease and severity markers linked to GSK3βby unbiased proteomic profiling utilizing fibroblasts derived from DM1 patients with low (80- 150) and high (2600- 3600) CTG-repeats. Apart from GSK3β increase, we identified dysregulation of nine proteins (CAPN1, CTNNB1, CTPS1, DNMT1, HDAC2, HNRNPH3, MAP2K2, NR3C1, VDAC2) modulated by GSK3β. In silico-based expression studies confirmed expression in neuronal and skeletal muscle cells and revealed a relatively elevated abundance in fibroblasts. The potential impact of each marker in the myopathology of DM1 is discussed based on respective function to inform potential uses as severity markers or for monitoring GSK3β inhibitor treatment responses.
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Affiliation(s)
- Valentina Grande
- Department of Neuropediatrics, University Hospital Essen, Duisburg-Essen University, Germany
| | - Denisa Hathazi
- Leibniz-Institut für Analytische Wissenschaften -ISAS- e.V., Dortmund, Germany.,Department of Clinical Neurosciences, School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - Emily O'Connor
- Childrens Hospital of Eastern Ontario Research Institute, University of Ottawa, Ottawa, ON, Canada
| | - Theo Marteau
- Department of Neuropediatrics, University Hospital Essen, Duisburg-Essen University, Germany
| | - Ulrike Schara-Schmidt
- Department of Neuropediatrics, University Hospital Essen, Duisburg-Essen University, Germany
| | - Andreas Hentschel
- Leibniz-Institut für Analytische Wissenschaften -ISAS- e.V., Dortmund, Germany
| | - Genevieve Gourdon
- Centre de Recherche en Myologie, Association Institut de Myologie, Sorbonne Université, Inserm UMR 974, Paris, France
| | - Nikoletta Nikolenko
- National Hospital for Neurology and Neurosurgery, University College London Hospitals NHS Foundation Trust, London, UK
| | - Hanns Lochmüller
- Childrens Hospital of Eastern Ontario Research Institute, University of Ottawa, Ottawa, ON, Canada.,Division of Neurology, Department of Medicine, The Ottawa Hospital, Ottawa, ON, Canada.,Department of Neuropediatrics and Muscle Disorders, Faculty of Medicine, Medical Center - University of Freiburg, Freiburg, Germany.,Centro Nacional de AnálisisGenómico, Center for Genomic Regulation (CNAG-CRG), Barcelona Institute of Science and Technology (BIST), Barcelona, Catalonia, Spain
| | - Andreas Roos
- Department of Neuropediatrics, University Hospital Essen, Duisburg-Essen University, Germany.,Childrens Hospital of Eastern Ontario Research Institute, University of Ottawa, Ottawa, ON, Canada
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12
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Mateus T, Martins F, Nunes A, Herdeiro MT, Rebelo S. Metabolic Alterations in Myotonic Dystrophy Type 1 and Their Correlation with Lipin. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18041794. [PMID: 33673200 PMCID: PMC7918590 DOI: 10.3390/ijerph18041794] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 02/06/2021] [Accepted: 02/08/2021] [Indexed: 12/14/2022]
Abstract
Myotonic dystrophy type 1 (DM1) is an autosomal dominant hereditary and multisystemic disease, characterized by progressive distal muscle weakness and myotonia. Despite huge efforts, the pathophysiological mechanisms underlying DM1 remain elusive. In this review, the metabolic alterations observed in patients with DM1 and their connection with lipin proteins are discussed. We start by briefly describing the epidemiology, the physiopathological and systemic features of DM1. The molecular mechanisms proposed for DM1 are explored and summarized. An overview of metabolic syndrome, dyslipidemia, and the summary of metabolic alterations observed in patients with DM1 are presented. Patients with DM1 present clinical evidence of metabolic alterations, namely increased levels of triacylglycerol and low-density lipoprotein, increased insulin and glucose levels, increased abdominal obesity, and low levels of high-density lipoprotein. These metabolic alterations may be associated with lipins, which are phosphatidate phosphatase enzymes that regulates the triacylglycerol levels, phospholipids, lipid signaling pathways, and are transcriptional co-activators. Furthermore, lipins are also important for autophagy, inflammasome activation and lipoproteins synthesis. We demonstrate the association of lipin with the metabolic alterations in patients with DM1, which supports further clinical studies and a proper exploration of lipin proteins as therapeutic targets for metabolic syndrome, which is important for controlling many diseases including DM1.
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Affiliation(s)
| | | | | | | | - Sandra Rebelo
- Correspondence: ; Tel.: +351-924-406-306; Fax: +351-234-372-587
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13
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Gizard F, Fernandez A, De Vadder F. Interactions between gut microbiota and skeletal muscle. Nutr Metab Insights 2021; 13:1178638820980490. [PMID: 33402830 PMCID: PMC7745561 DOI: 10.1177/1178638820980490] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 11/23/2020] [Indexed: 12/11/2022] Open
Abstract
The gut microbiota is now recognized as a major contributor to the host’s nutrition, metabolism, immunity, and neurological functions. Imbalanced microbiota (ie, dysbiosis) is linked to undernutrition-induced stunting, inflammatory and metabolic diseases, and cancers. Skeletal muscle also takes part in the interorgan crosstalk regulating substrate metabolism, immunity, and health. Here, we review the reciprocal influence of gut microbiota and skeletal muscle in relation to juvenile growth, performance, aging, and chronic diseases. Several routes involving the vascular system and organs such as the liver and adipose tissue connect the gut microbiota and skeletal muscle, with effects on fitness and health. Therapeutic perspectives arise from the health benefits observed with changes in gut microbiota and muscle activity, further encouraging multimodal therapeutic strategies.
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Affiliation(s)
- Florence Gizard
- Mammalian Cell Biology Group, Institute of Human Genetics UMR9002, CNRS-University of Montpellier, Montpellier, France
| | - Anne Fernandez
- Mammalian Cell Biology Group, Institute of Human Genetics UMR9002, CNRS-University of Montpellier, Montpellier, France
| | - Filipe De Vadder
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, École Normale Supérieure de Lyon, Centre National de la Recherche Scientifique, Université Claude Bernard Lyon 1, UMR5242, Lyon, France
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14
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Wang Y, Yu R, Wu L, Yang G. Hydrogen sulfide guards myoblasts from ferroptosis by inhibiting ALOX12 acetylation. Cell Signal 2020; 78:109870. [PMID: 33290842 DOI: 10.1016/j.cellsig.2020.109870] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 11/30/2020] [Accepted: 12/01/2020] [Indexed: 12/23/2022]
Abstract
Recognized as a novel and important gasotransmitter, hydrogen sulfide (H2S) is widely present in various tissues and organs. Cystathionine gamma-lyase (CSE)-derived H2S has been shown to regulate oxidative stress and lipid metabolism. The aim of the present study is to examine the role of H2S in ferroptosis and lipid peroxidation in mouse myoblasts and skeletal muscles. Ferroptosis agonist RSL3 inhibited the expressions of Gpx4 and reduced CSE/H2S signaling, which lead to increased oxidative stress, lipid peroxidation, and ferroptotic cell death. In addition, ferroptosis antagonist ferrostatin-1 (Fer-1) up-regulated the expression of CSE, scavenged the generation of reactive oxygen species (ROS) and lipid peroxidation, and improved cell viability. Exogenously applied NaHS was also able to block RSL3-induced ferroptotic cell death. Neither RSL3 nor H2S affected cell apoptosis. Furthermore, H2S reversed RSL3-induced Drp1 expression and mitochondrial damage, which lead to abnormal lipid metabolism as evidenced by altered expressions of ACSL4, FAS, ACC and CPT1 as well as higher acetyl-CoA contents in both cytoplasm and mitochondria. RSL3 promoted the protein expression and acetylation of ALOX12, a key protein in initiating membrane phospholipid oxidation, while the addition of NaHS attenuated ALOX12 acetylation and protected from membrane lipid peroxidation. Moreover, we observed that CSE deficiency alters the expressions of ferroptosis and lipid peroxidation-related proteins and enhances global protein acetylation in mouse skeletal muscles under aging or injury conditions. These results indicate that downregulation of CSE/H2S signaling would contribute to mitochondrial damage, abnormal lipid metabolism, membrane lipid peroxidation, and ferroptotic cell death. CSE/H2S system can be a target for preventing ferroptosis in skeletal muscle.
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Affiliation(s)
- Yuehong Wang
- Department of Chemistry and Biochemistry, Laurentian University, Sudbury, Canada; Cardiovascular and Metabolic Research Unit, Laurentian University, Sudbury, Canada
| | - Ruihuan Yu
- Department of Chemistry and Biochemistry, Laurentian University, Sudbury, Canada; Cardiovascular and Metabolic Research Unit, Laurentian University, Sudbury, Canada
| | - Lingyun Wu
- Cardiovascular and Metabolic Research Unit, Laurentian University, Sudbury, Canada; School of Human Kinetics, Laurentian University, Sudbury, Canada; Health Science North Research Institute, Sudbury, Canada
| | - Guangdong Yang
- Department of Chemistry and Biochemistry, Laurentian University, Sudbury, Canada; Cardiovascular and Metabolic Research Unit, Laurentian University, Sudbury, Canada.
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15
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Janovska P, Melenovsky V, Svobodova M, Havlenova T, Kratochvilova H, Haluzik M, Hoskova E, Pelikanova T, Kautzner J, Monzo L, Jurcova I, Adamcova K, Lenkova L, Buresova J, Rossmeisl M, Kuda O, Cajka T, Kopecky J. Dysregulation of epicardial adipose tissue in cachexia due to heart failure: the role of natriuretic peptides and cardiolipin. J Cachexia Sarcopenia Muscle 2020; 11:1614-1627. [PMID: 33084249 PMCID: PMC7749591 DOI: 10.1002/jcsm.12631] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 09/03/2020] [Accepted: 09/04/2020] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Cachexia worsens long-term prognosis of patients with heart failure (HF). Effective treatment of cachexia is missing. We seek to characterize mechanisms of cachexia in adipose tissue, which could serve as novel targets for the treatment. METHODS The study was conducted in advanced HF patients (n = 52; 83% male patients) undergoing heart transplantation. Patients with ≥7.5% non-intentional body weight (BW) loss during the last 6 months were rated cachectic. Clinical characteristics and circulating markers were compared between cachectic (n = 17) and the remaining, BW-stable patients. In epicardial adipose tissue (EAT), expression of selected genes was evaluated, and a combined metabolomic/lipidomic analysis was performed to assess (i) the role of adipose tissue metabolism in the development of cachexia and (ii) potential impact of cachexia-associated changes on EAT-myocardium environment. RESULTS Cachectic vs. BW-stable patients had higher plasma levels of natriuretic peptide B (BNP; 2007 ± 1229 vs. 1411 ± 1272 pg/mL; P = 0.010) and lower EAT thickness (2.1 ± 0.8 vs. 2.9 ± 1.4 mm; P = 0.010), and they were treated with ~2.5-fold lower dose of both β-blockers and angiotensin-converting enzyme inhibitors or angiotensin receptor blockers (ACE/ARB-inhibitors). The overall pattern of EAT gene expression suggested simultaneous activation of lipolysis and lipogenesis in cachexia. Lower ratio between expression levels of natriuretic peptide receptors C and A was observed in cachectic vs. BW-stable patients (0.47 vs. 1.30), supporting activation of EAT lipolysis by natriuretic peptides. Fundamental differences in metabolome/lipidome between BW-stable and cachectic patients were found. Mitochondrial phospholipid cardiolipin (CL), specifically the least abundant CL 70:6 species (containing C16:1, C18:1, and C18:2 acyls), was the most discriminating analyte (partial least squares discriminant analysis; variable importance in projection score = 4). Its EAT levels were higher in cachectic as compared with BW-stable patients and correlated with the degree of BW loss during the last 6 months (r = -0.94; P = 0.036). CONCLUSIONS Our results suggest that (i) BNP signalling contributes to changes in EAT metabolism in cardiac cachexia and (ii) maintenance of stable BW and 'healthy' EAT-myocardium microenvironment depends on the ability to tolerate higher doses of both ACE/ARB inhibitors and β-adrenergic blockers. In line with preclinical studies, we show for the first time in humans the association of cachexia with increased adipose tissue levels of CL. Specifically, CL 70:6 could precipitate wasting of adipose tissue, and thus, it could represent a therapeutic target to ameliorate cachexia.
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Affiliation(s)
- Petra Janovska
- Institute of Physiology of the Czech Academy of Sciences, Prague 4, Czech Republic
| | - Vojtech Melenovsky
- Department of Cardiology, Institute for Clinical and Experimental Medicine - IKEM, Prague, Czech Republic
| | - Michaela Svobodova
- Institute of Physiology of the Czech Academy of Sciences, Prague 4, Czech Republic
| | - Tereza Havlenova
- Department of Cardiology, Institute for Clinical and Experimental Medicine - IKEM, Prague, Czech Republic
| | - Helena Kratochvilova
- Department of Cardiology, Institute for Clinical and Experimental Medicine - IKEM, Prague, Czech Republic
| | - Martin Haluzik
- Department of Cardiology, Institute for Clinical and Experimental Medicine - IKEM, Prague, Czech Republic
| | - Eva Hoskova
- Department of Cardiology, Institute for Clinical and Experimental Medicine - IKEM, Prague, Czech Republic
| | - Terezie Pelikanova
- Department of Cardiology, Institute for Clinical and Experimental Medicine - IKEM, Prague, Czech Republic
| | - Josef Kautzner
- Department of Cardiology, Institute for Clinical and Experimental Medicine - IKEM, Prague, Czech Republic
| | - Luca Monzo
- Department of Cardiology, Institute for Clinical and Experimental Medicine - IKEM, Prague, Czech Republic
| | - Ivana Jurcova
- Department of Cardiology, Institute for Clinical and Experimental Medicine - IKEM, Prague, Czech Republic
| | - Katerina Adamcova
- Institute of Physiology of the Czech Academy of Sciences, Prague 4, Czech Republic
| | - Lucie Lenkova
- Institute of Physiology of the Czech Academy of Sciences, Prague 4, Czech Republic
| | - Jana Buresova
- Institute of Physiology of the Czech Academy of Sciences, Prague 4, Czech Republic
| | - Martin Rossmeisl
- Institute of Physiology of the Czech Academy of Sciences, Prague 4, Czech Republic
| | - Ondrej Kuda
- Institute of Physiology of the Czech Academy of Sciences, Prague 4, Czech Republic
| | - Tomas Cajka
- Institute of Physiology of the Czech Academy of Sciences, Prague 4, Czech Republic
| | - Jan Kopecky
- Institute of Physiology of the Czech Academy of Sciences, Prague 4, Czech Republic
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16
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Tsuchiya Y, Ozai R, Sugino T, Kawashima K, Kushibiki S, Kim YH, Sato S. Changes in peripheral blood oxidative stress markers and hepatic gene expression related to oxidative stress in Holstein cows with and without subacute ruminal acidosis during the periparturient period. J Vet Med Sci 2020; 82:1529-1536. [PMID: 32893200 PMCID: PMC7653322 DOI: 10.1292/jvms.20-0426] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
We investigated changes in peripheral blood metabolites, oxidative stress markers
(malondialdehyde, potential antioxidant capacity, and glutathione peroxidase [GPX]), and
hepatic gene expression related to oxidative stress in Holstein cows with and without
subacute ruminal acidosis (SARA) during the periparturient period. Eighteen multiparous
Holstein cows were categorized into SARA (n=9) or non-SARA (n=9) groups depending on
whether they developed SARA; reticulo-ruminal pH was <5.6 for more than 3 hr per day,
during the 2 weeks after parturition. Blood and liver tissue samples were collected 3
weeks prepartum and 2 and 6 weeks postpartum, with an additional blood sample collected 0
and 4 weeks postpartum. Blood aspartate transaminase (AST) and nonesterified fatty acid
(NEFA) increased significantly (P<0.05) after parturition in both
groups. GPX activity decreased gradually after parturition in the SARA group. In the SARA
group, gene expression of GPX 1 and microsomal glutathione S-transferase
3 (MGST3) decreased significantly (P<0.05), and
expression of metallothionein 2A increased significantly (P<0.05)
after parturition in the SARA group. Superoxide dismutase 1 and MGST3
decreased significantly (P<0.05) 2 weeks postpartum in the non-SARA
group. Gene expression related to oxidative stress was negatively correlated with AST,
NEFA and total ketone body levels. Therefore, the hepatic gene expression related to
oxidative stress might change associated with a negative energy balance, and might relate
the high oxidative stress in the SARA group during periparturient period.
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Affiliation(s)
- Yoshiyuki Tsuchiya
- Graduate School of Veterinary Sciences, Iwate University, Morioka, Iwate 020-8550, Japan.,Yamagata Prefectural Agricultural Mutual Aid Association, Tendo, Yamagata 994-8511, Japan
| | - Reiko Ozai
- Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Toshihisa Sugino
- The Research Center for Animal Science, Graduate School of Integrated Science for Life, Hiroshima University, Higashi-Hiroshima 739-8528, Japan
| | - Kenji Kawashima
- Chiba Prefectural Livestock Research Center, Yachimata, Chiba 289-1113, Japan
| | - Shiro Kushibiki
- Institute of Livestock and Grassland Science, NARO, Tsukuba, Ibaraki 305-0901, Japan
| | - Yo-Han Kim
- Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Shigeru Sato
- Graduate School of Veterinary Sciences, Iwate University, Morioka, Iwate 020-8550, Japan.,Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Iwate University, Morioka, Iwate 020-8550, Japan
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17
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Dowling P, Gargan S, Zweyer M, Swandulla D, Ohlendieck K. Proteomic profiling of fatty acid binding proteins in muscular dystrophy. Expert Rev Proteomics 2020; 17:137-148. [PMID: 32067530 DOI: 10.1080/14789450.2020.1732214] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Introduction: Duchenne muscular dystrophy is a neuromuscular disorder, which is caused by abnormalities in the DMD gene that encodes the membrane cytoskeletal protein dystrophin. Besides progressive skeletal muscle wasting, dystrophinopathy also affects non-skeletal muscle tissues, including cells in the cardio-respiratory system, the central nervous system, the liver and the kidney.Areas covered: This review summarizes the proteomic characterization of a key class of lipid chaperones, the large family of fatty acid binding proteins, and their potential role in muscular dystrophy. Recent proteomic surveys using animal models and patient specimens are reviewed. Pathobiochemical changes in specific proteoforms of fatty acid binding protein in the multi-system pathology of dystrophinopathy are discussed.Expert opinion: The mass spectrometric identification of distinct changes in fatty acid binding proteins in muscle, heart, liver, kidney and serum demonstrates that considerable alterations occur in key steps of metabolite transport and fat metabolism in muscular dystrophy. These new findings might be helpful to further develop a comprehensive biomarker signature of metabolic changes in X-linked muscular dystrophy, which should improve (i) our understanding of complex pathobiochemical changes due to dystrophin deficiency, (ii) the identification of novel therapeutic targets, and (iii) the design of differential diagnostic, prognostic and therapy-monitoring approaches.
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Affiliation(s)
- Paul Dowling
- Department of Biology, Maynooth University, National University of Ireland, Maynooth, Co. Kildare, Ireland.,Kathleen Lonsdale Institute for Human Health Research, Maynooth University, Maynooth, Co. Kildare, Ireland
| | - Stephen Gargan
- Department of Biology, Maynooth University, National University of Ireland, Maynooth, Co. Kildare, Ireland.,Kathleen Lonsdale Institute for Human Health Research, Maynooth University, Maynooth, Co. Kildare, Ireland
| | - Margit Zweyer
- Department of Neonatology and Pediatric Intensive Care, Children's Hospital, University of Bonn, Bonn, Germany
| | | | - Kay Ohlendieck
- Department of Biology, Maynooth University, National University of Ireland, Maynooth, Co. Kildare, Ireland.,Kathleen Lonsdale Institute for Human Health Research, Maynooth University, Maynooth, Co. Kildare, Ireland
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18
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Ren M, Miller PC, Schlame M, Phoon CKL. A critical appraisal of the tafazzin knockdown mouse model of Barth syndrome: what have we learned about pathogenesis and potential treatments? Am J Physiol Heart Circ Physiol 2019; 317:H1183-H1193. [PMID: 31603701 DOI: 10.1152/ajpheart.00504.2019] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Pediatric heart failure remains poorly understood, distinct in many aspects from adult heart failure. Limited data point to roles of altered mitochondrial functioning and, in particular, changes in mitochondrial lipids, especially cardiolipin. Barth syndrome is a mitochondrial disorder caused by tafazzin mutations that lead to abnormal cardiolipin profiles. Patients are afflicted by cardiomyopathy, skeletal myopathy, neutropenia, and growth delay. A mouse model of Barth syndrome was developed a decade ago, which relies on a doxycycline-inducible short hairpin RNA to knock down expression of tafazzin mRNA (TAZKD). Our objective was to review published data from the TAZKD mouse to determine its contributions to our pathogenetic understanding of, and potential treatment strategies for, Barth syndrome. In regard to the clinical syndrome, the reported physiological, biochemical, and ultrastructural abnormalities of the mouse model mirror those in Barth patients. Using this model, the peroxisome proliferator-activated receptor pan-agonist bezafibrate has been suggested as potential therapy because it ameliorated the cardiomyopathy in TAZKD mice, while increasing mitochondrial biogenesis. A clinical trial is now underway to test bezafibrate in Barth syndrome patients. Thus the TAZKD mouse model of Barth syndrome has led to important insights into disease pathogenesis and therapeutic targets, which can potentially translate to pediatric heart failure.
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Affiliation(s)
- Mindong Ren
- Department of Anesthesiology, New York University School of Medicine, New York, New York.,Department of Cell Biology, New York University School of Medicine, New York, New York
| | - Paighton C Miller
- Department of Pediatrics, Division of Pediatric Cardiology, New York University School of Medicine, New York, New York
| | - Michael Schlame
- Department of Anesthesiology, New York University School of Medicine, New York, New York.,Department of Cell Biology, New York University School of Medicine, New York, New York
| | - Colin K L Phoon
- Department of Pediatrics, Division of Pediatric Cardiology, New York University School of Medicine, New York, New York
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19
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Betts CA, McClorey G, Healicon R, Hammond SM, Manzano R, Muses S, Ball V, Godfrey C, Merritt TM, van Westering T, O'Donovan L, Wells KE, Gait MJ, Wells DJ, Tyler D, Wood MJ. Cmah-dystrophin deficient mdx mice display an accelerated cardiac phenotype that is improved following peptide-PMO exon skipping treatment. Hum Mol Genet 2019; 28:396-406. [PMID: 30281092 PMCID: PMC6337703 DOI: 10.1093/hmg/ddy346] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 09/21/2018] [Indexed: 01/14/2023] Open
Abstract
Duchenne muscular dystrophy (DMD) is caused by loss of dystrophin protein, leading to progressive muscle weakness and premature death due to respiratory and/or cardiac complications. Cardiac involvement is characterized by progressive dilated cardiomyopathy, decreased fractional shortening and metabolic dysfunction involving reduced metabolism of fatty acids-the major cardiac metabolic substrate. Several mouse models have been developed to study molecular and pathological consequences of dystrophin deficiency, but do not recapitulate all aspects of human disease pathology and exhibit a mild cardiac phenotype. Here we demonstrate that Cmah (cytidine monophosphate-sialic acid hydroxylase)-deficient mdx mice (Cmah-/-;mdx) have an accelerated cardiac phenotype compared to the established mdx model. Cmah-/-;mdx mice display earlier functional deterioration, specifically a reduction in right ventricle (RV) ejection fraction and stroke volume (SV) at 12 weeks of age and decreased left ventricle diastolic volume with subsequent reduced SV compared to mdx mice by 24 weeks. They further show earlier elevation of cardiac damage markers for fibrosis (Ctgf), oxidative damage (Nox4) and haemodynamic load (Nppa). Cardiac metabolic substrate requirement was assessed using hyperpolarized magnetic resonance spectroscopy indicating increased in vivo glycolytic flux in Cmah-/-;mdx mice. Early upregulation of mitochondrial genes (Ucp3 and Cpt1) and downregulation of key glycolytic genes (Pdk1, Pdk4, Ppara), also denote disturbed cardiac metabolism and shift towards glucose utilization in Cmah-/-;mdx mice. Moreover, we show long-term treatment with peptide-conjugated exon skipping antisense oligonucleotides (20-week regimen), resulted in 20% cardiac dystrophin protein restoration and significantly improved RV cardiac function. Therefore, Cmah-/-;mdx mice represent an appropriate model for evaluating cardiac benefit of novel DMD therapeutics.
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Affiliation(s)
- Corinne A Betts
- Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford, UK
| | - Graham McClorey
- Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford, UK
| | - Richard Healicon
- Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford, UK
| | - Suzan M Hammond
- Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford, UK
| | - Raquel Manzano
- Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford, UK
| | - Sofia Muses
- Department of Comparative Biomedical Sciences, Royal Veterinary College, Royal College Street, London, UK
| | - Vicky Ball
- Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford, UK
| | - Caroline Godfrey
- Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford, UK
| | - Thomas M Merritt
- Clinical Biomanufacturing Facility, Nuffield Department of Clinical Medicine, University of Oxford, Old Road, Oxford, UK
| | - Tirsa van Westering
- Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford, UK
| | - Liz O'Donovan
- Medical Research Council, Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, UK
| | - Kim E Wells
- Department of Comparative Biomedical Sciences, Royal Veterinary College, Royal College Street, London, UK
| | - Michael J Gait
- Medical Research Council, Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, UK
| | - Dominic J Wells
- Department of Comparative Biomedical Sciences, Royal Veterinary College, Royal College Street, London, UK
| | - Damian Tyler
- Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford, UK
| | - Matthew J Wood
- Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford, UK
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20
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Haynes VR, Keenan SN, Bayliss J, Lloyd EM, Meikle PJ, Grounds MD, Watt MJ. Dysferlin deficiency alters lipid metabolism and remodels the skeletal muscle lipidome in mice. J Lipid Res 2019; 60:1350-1364. [PMID: 31203232 DOI: 10.1194/jlr.m090845] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 05/14/2019] [Indexed: 12/15/2022] Open
Abstract
Defects in the gene coding for dysferlin, a membrane-associated protein, affect many tissues, including skeletal muscles, with a resultant myopathy called dysferlinopathy. Dysferlinopathy manifests postgrowth with a progressive loss of skeletal muscle function, early intramyocellular lipid accumulation, and a striking later replacement of selective muscles by adipocytes. To better understand the changes underpinning this disease, we assessed whole-body energy homeostasis, skeletal muscle fatty acid metabolism, lipolysis in adipose tissue, and the skeletal muscle lipidome using young adult dysferlin-deficient male BLAJ mice and age-matched C57Bl/6J WT mice. BLAJ mice had increased lean mass and reduced fat mass associated with increased physical activity and increased adipose tissue lipolysis. Skeletal muscle fatty acid metabolism was remodeled in BLAJ mice, characterized by a partitioning of fatty acids toward storage rather than oxidation. Lipidomic analysis identified marked changes in almost all lipid classes examined in the skeletal muscle of BLAJ mice, including sphingolipids, phospholipids, cholesterol, and most glycerolipids but, surprisingly, not triacylglycerol. These observations indicate that an early manifestation of dysferlin deficiency is the reprogramming of skeletal muscle and adipose tissue lipid metabolism, which is likely to contribute to the progressive adverse histopathology in dysferlinopathies.
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Affiliation(s)
- Vanessa R Haynes
- Department of Physiology, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Australia
| | - Stacey N Keenan
- Department of Physiology, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Australia
| | - Jackie Bayliss
- Department of Physiology, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Australia
| | - Erin M Lloyd
- School of Human Sciences University of Western Australia, Perth, Australia
| | - Peter J Meikle
- Metabolomics Laboratory Baker Heart Institute, Melbourne, Australia
| | - Miranda D Grounds
- School of Human Sciences University of Western Australia, Perth, Australia
| | - Matthew J Watt
- Department of Physiology, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Australia
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21
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Aruoma OI, Hausman-Cohen S, Pizano J, Schmidt MA, Minich DM, Joffe Y, Brandhorst S, Evans SJ, Brady DM. Personalized Nutrition: Translating the Science of NutriGenomics Into Practice: Proceedings From the 2018 American College of Nutrition Meeting. J Am Coll Nutr 2019; 38:287-301. [DOI: 10.1080/07315724.2019.1582980] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Okezie I Aruoma
- California State University Los Angeles, Los Angeles, California, USA
- Southern California University of Health Sciences, Whittier, California, USA
| | | | - Jessica Pizano
- Nutritional Genomics Institute, SNPed, and OmicsDX, Chasterfield, Virginia, USA
| | - Michael A. Schmidt
- Advanced Pattern Analysis & Countermeasures Group, Boulder, Colorado, USA
- Sovaris Aerospace, Boulder, Colorado, USA
| | - Deanna M. Minich
- University of Western States, Portland, Oregon, USA
- Institute for Functional Medicine, Federal Way, Washington, USA
| | - Yael Joffe
- 3X4 Genetics and Manuka Science, Cape Town, South Africa
| | | | | | - David M. Brady
- University of Bridgeport, Bridgeport, Connecticut, USA
- Whole Body Medicine, Fairfield, Connecticut, USA
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22
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Fatty Acid Metabolism Disorder as a Factor in Atherogenesis. ROMANIAN JOURNAL OF DIABETES NUTRITION AND METABOLIC DISEASES 2018. [DOI: 10.2478/rjdnmd-2018-0028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Abstract
Background and aims: The study aims to analyze of fatty acid (FA) composition of arteries and blood plasma in atherosclerosis.
Material and method: The blood plasma in patients with coronary atherosclerosis was studied, the blood from healthy volunteers was used as control. There were also analyzed arteries of patients with severe atherosclerotic lesions and arteries of people with significantly less atherosclerotic changes.
Results: The received data indicates that there is a rather active penetration of FA from blood plasma lipoproteins into intima of arteries. Penetration of FA from blood lipoproteins into the depth of atherosclerotic aorta and an atherosclerotic plaque appears to be small and does not effect on their fatty acid composition, which is similar to that of free FA of blood plasma. The evidence of the increased activity of desaturases and fatty acid synthases in atherosclerotic and intact arteries in patients with severe atherosclerotic vascular lesions was obtained. This increase in activity may be related by relatively low content of polyunsaturated linoleic acid in blood plasma in atherosclerosis.
Conclusions: The increased activity of desaturases and fatty acid synthases as well as arterial wall hypoxia must promote accumulation of lipids in vascular wall by increasing the synthesis and inhibition of FA oxidation including free FA coming from blood.
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23
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Agarwal P, Cole LK, Chandrakumar A, Hauff KD, Ravandi A, Dolinsky VW, Hatch GM. Phosphokinome Analysis of Barth Syndrome Lymphoblasts Identify Novel Targets in the Pathophysiology of the Disease. Int J Mol Sci 2018; 19:ijms19072026. [PMID: 30002286 PMCID: PMC6073761 DOI: 10.3390/ijms19072026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 07/06/2018] [Accepted: 07/09/2018] [Indexed: 12/25/2022] Open
Abstract
Barth Syndrome (BTHS) is a rare X-linked genetic disease in which the specific biochemical deficit is a reduction in the mitochondrial phospholipid cardiolipin (CL) as a result of a mutation in the CL transacylase tafazzin. We compared the phosphokinome profile in Epstein-Barr-virus-transformed lymphoblasts prepared from a BTHS patient with that of an age-matched control individual. As expected, mass spectrometry analysis revealed a significant (>90%) reduction in CL in BTHS lymphoblasts compared to controls. In addition, increased oxidized phosphatidylcholine (oxPC) and phosphatidylethanolamine (PE) levels were observed in BTHS lymphoblasts compared to control. Given the broad shifts in metabolism associated with BTHS, we hypothesized that marked differences in posttranslational modifications such as phosphorylation would be present in the lymphoblast cells of a BTHS patient. Phosphokinome analysis revealed striking differences in the phosphorylation levels of phosphoproteins in BTHS lymphoblasts compared to control cells. Some phosphorylated proteins, for example, adenosine monophosphate kinase, have been previously validated as bonafide modified phosphorylation targets observed in tafazzin deficiency or under conditions of reduced cellular CL. Thus, we report multiple novel phosphokinome targets in BTHS lymphoblasts and hypothesize that alteration in the phosphokinome profile may provide insight into the pathophysiology of BTHS and potential therapeutic targets.
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Affiliation(s)
- Prasoon Agarwal
- Department of Pharmacology and Therapeutics, University of Manitoba, Winnipeg, MB R3E 3P4, Canada.
- Diabetes Research Envisioned and Accomplished in Manitoba (DREAM), Children's Hospital Research Institute of Manitoba, Winnipeg, MB R3E 3P4, Canada.
- Manitoba Developmental Origins of Chronic Diseases in Children Network (DEVOTION), University of Manitoba, Winnipeg, MB R3E 3P4, Canada.
| | - Laura K Cole
- Department of Pharmacology and Therapeutics, University of Manitoba, Winnipeg, MB R3E 3P4, Canada.
| | - Abin Chandrakumar
- Department of Pharmacology and Therapeutics, University of Manitoba, Winnipeg, MB R3E 3P4, Canada.
- Clinical Research Unit, Children's Hospital Research Institute of Manitoba, Winnipeg, MB R3E 3P4, Canada.
| | - Kristin D Hauff
- Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC V6T 2B5, Canada.
| | - Amir Ravandi
- Physiology and Pathophysiology, University of Manitoba, St. Boniface Hospital Research Center, Winnipeg, MB R2H 2A6, Canada.
| | - Vernon W Dolinsky
- Department of Pharmacology and Therapeutics, University of Manitoba, Winnipeg, MB R3E 3P4, Canada.
- Diabetes Research Envisioned and Accomplished in Manitoba (DREAM), Children's Hospital Research Institute of Manitoba, Winnipeg, MB R3E 3P4, Canada.
- Manitoba Developmental Origins of Chronic Diseases in Children Network (DEVOTION), University of Manitoba, Winnipeg, MB R3E 3P4, Canada.
| | - Grant M Hatch
- Department of Pharmacology and Therapeutics, University of Manitoba, Winnipeg, MB R3E 3P4, Canada.
- Diabetes Research Envisioned and Accomplished in Manitoba (DREAM), Children's Hospital Research Institute of Manitoba, Winnipeg, MB R3E 3P4, Canada.
- Center for Research and Treatment of Atherosclerosis, University of Manitoba, Winnipeg, MB R3E 3P4, Canada.
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24
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Takeda M, Sakaguchi T, Hiraide T, Shibasaki Y, Morita Y, Kikuchi H, Ikegami K, Setou M, Konno H, Takeuchi H. Role of caveolin-1 in hepatocellular carcinoma arising from non-alcoholic fatty liver disease. Cancer Sci 2018; 109:2401-2411. [PMID: 29896915 PMCID: PMC6113505 DOI: 10.1111/cas.13659] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 05/25/2018] [Indexed: 02/06/2023] Open
Abstract
The molecular features of hepatocellular carcinoma arising from non-alcoholic fatty liver disease (NAFLD-HCC) are not well known. In this study, we investigated the mechanism by which NAFLD-HCC survives in a fat-rich environment. We found that caveolin (CAV)-1 was overexpressed in clinical specimens from NAFLD-HCC patients. HepG2, HLE, and HuH-7 HCC cell lines showed decreased proliferation in the presence of the saturated fatty acids palmitic acid and stearic acid, although only HLE cells expressed high levels of CAV-1. HLE cells treated with oleic acid (OA) showed robust proliferation, whereas CAV-null HepG2 cells showed reduced proliferation and increased apoptosis. CAV-1 knockdown in HLE cells attenuated the OA-induced increase in proliferation and enhanced apoptosis. Liquid chromatography-tandem mass spectrometry analysis revealed that the levels of OA-containing ceramide, a pro-apoptotic factor, were higher in HepG2 and CAV-1-deficient HLE cells than in HLE cells, suggesting that CAV-1 inhibits apoptosis by decreasing the level of OA-containing ceramide. These results indicate that CAV-1 is important for NAFLD-HCC survival in fatty acid-rich environments and is a potential therapeutic target.
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Affiliation(s)
- Makoto Takeda
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan.,Department of Cellular and Molecular Anatomy, International Mass Imaging Center, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Takanori Sakaguchi
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Takanori Hiraide
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Yasushi Shibasaki
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Yoshifumi Morita
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Hirotoshi Kikuchi
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Koji Ikegami
- Department of Cellular and Molecular Anatomy, International Mass Imaging Center, Hamamatsu University School of Medicine, Hamamatsu, Japan.,Department of Anatomy and Developmental Biology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Mitsutoshi Setou
- Department of Cellular and Molecular Anatomy, International Mass Imaging Center, Hamamatsu University School of Medicine, Hamamatsu, Japan.,Pre-eminent Medical Photonics Education and Research Center, Hamamatsu University School of Medicine, Hamamatsu, Japan.,Department of Anatomy, The University of Hong Kong, Hong Kong, China
| | - Hiroyuki Konno
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Hiroya Takeuchi
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
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25
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Debashree B, Kumar M, Keshava Prasad TS, Natarajan A, Christopher R, Nalini A, Bindu PS, Gayathri N, Srinivas Bharath MM. Mitochondrial dysfunction in human skeletal muscle biopsies of lipid storage disorder. J Neurochem 2018; 145:323-341. [PMID: 29424033 DOI: 10.1111/jnc.14318] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 01/28/2018] [Accepted: 01/30/2018] [Indexed: 02/06/2023]
Abstract
Mitochondria regulate the balance between lipid metabolism and storage in the skeletal muscle. Altered lipid transport, metabolism and storage influence the bioenergetics, redox status and insulin signalling, contributing to cardiac and neurological diseases. Lipid storage disorders (LSDs) are neurological disorders which entail intramuscular lipid accumulation and impaired mitochondrial bioenergetics in the skeletal muscle causing progressive myopathy with muscle weakness. However, the mitochondrial changes including molecular events associated with impaired lipid storage have not been completely understood in the human skeletal muscle. We carried out morphological and biochemical analysis of mitochondrial function in muscle biopsies of human subjects with LSDs (n = 7), compared to controls (n = 10). Routine histology, enzyme histochemistry and ultrastructural analysis indicated altered muscle cell morphology and mitochondrial structure. Protein profiling of the muscle mitochondria from LSD samples (n = 5) (vs. control, n = 5) by high-throughput mass spectrometric analysis revealed that impaired metabolic processes could contribute to mitochondrial dysfunction and ensuing myopathy in LSDs. We propose that impaired fatty acid and respiratory metabolism along with increased membrane permeability, elevated lipolysis and altered cristae entail mitochondrial dysfunction in LSDs. Some of these mechanisms were unique to LSD apart from others that were common to dystrophic and inflammatory muscle pathologies. Many differentially regulated mitochondrial proteins in LSD are linked with other human diseases, indicating that mitochondrial protection via targeted drugs could be a treatment modality in LSD and related metabolic diseases. Cover Image for this Issue: doi: 10.1111/jnc.14177.
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Affiliation(s)
- Bandopadhyay Debashree
- Department of Neurochemistry, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Manish Kumar
- Institute of Bioinformatics, Bangalore, Karnataka, India.,Manipal University, Manipal, Karnataka, India
| | - Thottethodi Subrahmanya Keshava Prasad
- Institute of Bioinformatics, Bangalore, Karnataka, India.,Center for Systems Biology and Molecular Medicine, Yenepoya University, Mangalore, Karnataka, India
| | - Archana Natarajan
- Department of Neurochemistry, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Rita Christopher
- Department of Neurochemistry, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Atchayaram Nalini
- Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Parayil Sankaran Bindu
- Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Narayanappa Gayathri
- Department of Neuropathology, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
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26
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Ohlig T, Le DV, Gardemann A, Wolke C, Gürtler S, Peter D, Schild L, Lendeckel U. Effects of siRNA-dependent knock-down of cardiolipin synthase and tafazzin on mitochondria and proliferation of glioma cells. Biochim Biophys Acta Mol Cell Biol Lipids 2018; 1863:379-387. [PMID: 29325722 DOI: 10.1016/j.bbalip.2018.01.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 01/03/2018] [Accepted: 01/06/2018] [Indexed: 12/13/2022]
Abstract
The mitochondrial phospholipid cardiolipin (CL) has been implicated with mitochondrial morphology, function, and cell proliferation. Changes in CL are often paralleled by changes in the lipid environment of mitochondria that may contribute to mitochondrial function and proliferation. This study aimed to separate the effects of CL content and CL composition from cellular free fatty acid distribution on bioenergetics and proliferation in C6 glioma cells. To this end, cardiolipin synthase and the CL remodelling enzyme, tafazzin, were knocked-down by siRNA in C6 cells. After 72 h of cultivation, we analysed CL composition by means of LC/MS/MS, distribution of cellular fatty acids by means of gas chromatography, and determined oxygen consumption and proliferation. Knock-down of cardiolipin synthase affected the cellular CL content in the presence of linoleic acid (LA) in the culture medium. Knock-down of tafazzin had no consequence with respect to the pattern of cellular fatty acids but caused a decrease in cell proliferation. It significantly changed the distribution of molecular CL species, increased CL content, decreased oxygen consumption, and decreased cell proliferation when cultured in the presence of linoleic acid (LA). The addition of linoleic acid to the culture medium caused significant changes in the pattern of cellular fatty acids and the composition of molecular CL species. These data suggest that tafazzin is required for efficient bioenergetics and for proliferation of glioma cells. Supplementation of fatty acids can be a powerful tool to direct specific changes in these parameters.
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Affiliation(s)
- Theresa Ohlig
- Department of Pathological Biochemistry, Otto-von-Guericke University, D-39120 Magdeburg, Germany
| | - Do Viet Le
- Department of Pathological Biochemistry, Otto-von-Guericke University, D-39120 Magdeburg, Germany
| | - Andreas Gardemann
- Department of Pathological Biochemistry, Otto-von-Guericke University, D-39120 Magdeburg, Germany
| | - Carmen Wolke
- Institute of Medical Biochemistry and Molecular Biology, University Medicine Greifswald, D-17475 Greifswald, Germany
| | - Sarah Gürtler
- Institute of Medical Biochemistry and Molecular Biology, University Medicine Greifswald, D-17475 Greifswald, Germany
| | - Daniela Peter
- Department of Pathological Biochemistry, Otto-von-Guericke University, D-39120 Magdeburg, Germany
| | - Lorenz Schild
- Department of Pathological Biochemistry, Otto-von-Guericke University, D-39120 Magdeburg, Germany.
| | - Uwe Lendeckel
- Institute of Medical Biochemistry and Molecular Biology, University Medicine Greifswald, D-17475 Greifswald, Germany
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27
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Ikemoto-Uezumi M, Matsui Y, Hasegawa M, Fujita R, Kanayama Y, Uezumi A, Watanabe T, Harada A, Poole AR, Hashimoto N. Disuse Atrophy Accompanied by Intramuscular Ectopic Adipogenesis in Vastus Medialis Muscle of Advanced Osteoarthritis Patients. THE AMERICAN JOURNAL OF PATHOLOGY 2017; 187:2674-2685. [PMID: 28919112 DOI: 10.1016/j.ajpath.2017.08.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 07/26/2017] [Accepted: 08/03/2017] [Indexed: 12/16/2022]
Abstract
Muscle dysfunction is the most important modifiable mediating factor in primary osteoarthritis (OA) because properly contracting muscles are a key absorber of forces acting on a joint. However, the pathological features of disuse muscle atrophy in OA patients have been rarely studied. Vastus medialis muscles of 14 female patients with OA (age range, 69 to 86 years), largely immobile for 1 or more years, were obtained during arthroplastic surgery and analyzed histologically. These were compared with female patients without arthritis, two with patellar fracture and two with patellar subluxation. Areas occupied by myofibers and adipose tissue were quantified. Large numbers of myofibers were lost in the vastus medialis of OA patients. The loss of myofibers was a possible cause of the reduction in muscle strength of the operated on knee. These changes were significantly correlated with an increase in intramuscular ectopic adipose tissue, and not observed in knees of nonarthritic patients. Resident platelet-derived growth factor receptor α-positive mesenchymal progenitor cells contributed to ectopic adipogenesis in vastus medialis muscles of OA patients. The present study suggests that significant loss of myofibers and ectopic adipogenesis in vastus medialis muscles are common pathological features of advanced knee OA patients with long-term loss of mobility. These changes may be related to the loss of joint function in patients with knee OA.
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Affiliation(s)
- Madoka Ikemoto-Uezumi
- Department of Regenerative Medicine, Institute, National Center for Geriatrics and Gerontology, Oobu, Japan
| | - Yasumoto Matsui
- Department of Orthopedic Surgery, Hospital, National Center for Geriatrics and Gerontology, Oobu, Japan.
| | - Masaki Hasegawa
- Department of Pathology, Hospital, National Center for Geriatrics and Gerontology, Oobu, Japan
| | - Remi Fujita
- Department of Rehabilitation and Care, Seijoh University, Tokai, Japan
| | - Yasuhide Kanayama
- Department of Orthopedic Surgery and Rheumatology, Toyota Kosei Hospital, Toyota, Japan
| | - Akiyoshi Uezumi
- Division for Therapies against Intractable Diseases, Institute for Comprehensive Medical Science, Fujita Health University, Toyoake, Japan
| | - Tsuyoshi Watanabe
- Department of Orthopedic Surgery, Hospital, National Center for Geriatrics and Gerontology, Oobu, Japan
| | - Atsushi Harada
- Department of Orthopedic Surgery, Hospital, National Center for Geriatrics and Gerontology, Oobu, Japan
| | - A Robin Poole
- Division of Orthopaedics, Department of Surgery, McGill University, Montreal, Quebec, Canada
| | - Naohiro Hashimoto
- Department of Regenerative Medicine, Institute, National Center for Geriatrics and Gerontology, Oobu, Japan.
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28
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Abnormal lipid metabolism in skeletal muscle tissue of patients with muscular dystrophy: In vitro, high-resolution NMR spectroscopy based observation in early phase of the disease. Magn Reson Imaging 2017; 38:163-173. [PMID: 28069416 DOI: 10.1016/j.mri.2017.01.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 01/01/2017] [Accepted: 01/02/2017] [Indexed: 11/23/2022]
Abstract
PURPOSE Qualitative (assignment of lipid components) and quantitative (quantification of lipid components) analysis of lipid components were performed in skeletal muscle tissue of patients with muscular dystrophy in early phase of the disease as compared to control/normal subjects. METHODS Proton nuclear magnetic resonance (NMR) spectroscopy based experiment was performed on the lipid extract of skeletal muscle tissue of patients with muscular dystrophy in early phase of the disease and normal individuals for the analysis of lipid components [triglycerides, phospholipids, total cholesterol and unsaturated fatty acids (arachidonic, linolenic and linoleic acid)]. Specimens of muscle tissue were obtained from patients with Duchenne muscular dystrophy (DMD) [n=11; Age, Mean±SD; 9.2±1.4years; all were males], Becker muscular dystrophy (BMD) [n=12; Age, Mean±SD; 21.4±5.0years; all were males], facioscapulohumeral muscular dystrophy (FSHD) [n=11; Age, Mean±SD; 23.7±7.5years; all were males] and limb girdle muscular dystrophy-2B (LGMD-2B) [n=18; Age, Mean±SD; 24.2±4.1years; all were males]. Muscle specimens were also obtained from [n=30; Mean age±SD 23.1±6.0years; all were males] normal/control subjects. RESULTS Assigned lipid components in skeletal muscle tissue were triglycerides (TG), phospholipids (PL), total cholesterol (CHOL) and unsaturated fatty acids (arachidonic, linolenic and linoleic acid)]. Quantity of lipid components was observed in skeletal muscle tissue of DMD, BMD, FSHD and LGMD-2B patients as compared to control/normal subjects. TG was significantly elevated in muscle tissue of DMD, BMD and LGMD-2B patients. Increase level of CHOL was found only in muscle of DMD patients. Level of PL was found insignificant for DMD, BMD and LGMD-2B patients. Quantity of TG, PL and CHOL was unaltered in the muscle of patients with FSHD as compared to control/normal subjects. Linoleic acids were significantly reduced in muscle tissue of DMD, BMD, FSHD and LGMD-2B as compared to normal/control individuals. CONCLUSIONS Results clearly indicate alteration of lipid metabolism in patients with muscular dystrophy in early phase of the disease. Moreover, further evaluation is required to understand whether these changes are primary or secondary to muscular dystrophy. In future, these findings may prove an additional and improved approach for the diagnosis of different forms of muscular dystrophy.
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29
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The heart in sickle cell disease, a model for heart failure with preserved ejection fraction. Proc Natl Acad Sci U S A 2016; 113:9670-2. [PMID: 27512036 DOI: 10.1073/pnas.1611899113] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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30
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Known unknowns of cardiolipin signaling: The best is yet to come. Biochim Biophys Acta Mol Cell Biol Lipids 2016; 1862:8-24. [PMID: 27498292 PMCID: PMC5323096 DOI: 10.1016/j.bbalip.2016.08.001] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 07/27/2016] [Accepted: 08/01/2016] [Indexed: 12/11/2022]
Abstract
Since its discovery 75years ago, a wealth of knowledge has accumulated on the role of cardiolipin, the hallmark phospholipid of mitochondria, in bioenergetics and particularly on the structural organization of the inner mitochondrial membrane. A surge of interest in this anionic doubly-charged tetra-acylated lipid found in both prokaryotes and mitochondria has emerged based on its newly discovered signaling functions. Cardiolipin displays organ, tissue, cellular and transmembrane distribution asymmetries. A collapse of the membrane asymmetry represents a pro-mitophageal mechanism whereby externalized cardiolipin acts as an "eat-me" signal. Oxidation of cardiolipin's polyunsaturated acyl chains - catalyzed by cardiolipin complexes with cytochrome c. - is a pro-apoptotic signal. The messaging functions of myriads of cardiolipin species and their oxidation products are now being recognized as important intracellular and extracellular signals for innate and adaptive immune systems. This newly developing field of research exploring cardiolipin signaling is the main subject of this review. This article is part of a Special Issue entitled: Lipids of Mitochondria edited by Guenther Daum.
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31
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Hsu P, Liu X, Zhang J, Wang HG, Ye JM, Shi Y. Cardiolipin remodeling by TAZ/tafazzin is selectively required for the initiation of mitophagy. Autophagy 2016; 11:643-52. [PMID: 25919711 DOI: 10.1080/15548627.2015.1023984] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Tafazzin (TAZ) is a phospholipid transacylase that catalyzes the remodeling of cardiolipin, a mitochondrial phospholipid required for oxidative phosphorylation. Mutations of TAZ cause Barth syndrome, which is characterized by mitochondrial dysfunction and dilated cardiomyopathy, leading to premature death. However, the molecular mechanisms underlying the cause of mitochondrial dysfunction in Barth syndrome remain poorly understood. Here we investigated the role of TAZ in regulating mitochondrial function and mitophagy. Using primary mouse embryonic fibroblasts (MEFs) with doxycycline-inducible knockdown of Taz, we showed that TAZ deficiency in MEFs caused defective mitophagosome biogenesis, but not other autophagic processes. Consistent with a key role of mitophagy in mitochondria quality control, TAZ deficiency in MEFs also led to impaired oxidative phosphorylation and severe oxidative stress. Together, these findings provide key insights on mitochondrial dysfunction in Barth syndrome, suggesting that pharmacological restoration of mitophagy may provide a novel treatment for this lethal condition.
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Key Words
- AdGFP-LC3, recombinant adenovirus expressing GFP tagged MAP1LC3B
- AdTAZ, recombinant adenovirus expressing Myc-tagged TAZ
- BTHS, Barth syndrome
- BafA1, bafilomycin A1
- Barth syndrome
- CCCP, carbonyl cyanide m-chlorophenylhydrazone
- CL, cardiolipin
- Dox, doxycycline
- FCCP, carbonyl cyanide p-triflouromethoxyphenylhydrazone
- LTG, LysoTracker Green
- MAP1LC3B/LC3B, microtubule-associated protein 1 light chain 3 beta
- MEF, mouse embryonic fibroblast
- MLCL, monolysocardiolipin
- MTR, MitoTracker Red
- PARK2, parkin RBR E3 ubiquitin protein ligase
- PINK1, PTEN-induced putative kinase 1
- SOD2, superoxide dismutase 2 mitochondrial
- TAZ, tafazzin
- TLCL, tetralinoleoyl-cardiolipin
- autophagy
- cardiolipin
- mitochondrial dysfunction
- mitophagosome
- mitophagy
- tafazzin
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Affiliation(s)
- Paul Hsu
- a Department of Cellular and Molecular Physiology ; Hershey , PA USA
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Longo N, Frigeni M, Pasquali M. Carnitine transport and fatty acid oxidation. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2016; 1863:2422-35. [PMID: 26828774 DOI: 10.1016/j.bbamcr.2016.01.023] [Citation(s) in RCA: 480] [Impact Index Per Article: 60.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 01/27/2016] [Accepted: 01/28/2016] [Indexed: 12/14/2022]
Abstract
Carnitine is essential for the transfer of long-chain fatty acids across the inner mitochondrial membrane for subsequent β-oxidation. It can be synthesized by the body or assumed with the diet from meat and dairy products. Defects in carnitine biosynthesis do not routinely result in low plasma carnitine levels. Carnitine is accumulated by the cells and retained by kidneys using OCTN2, a high affinity organic cation transporter specific for carnitine. Defects in the OCTN2 carnitine transporter results in autosomal recessive primary carnitine deficiency characterized by decreased intracellular carnitine accumulation, increased losses of carnitine in the urine, and low serum carnitine levels. Patients can present early in life with hypoketotic hypoglycemia and hepatic encephalopathy, or later in life with skeletal and cardiac myopathy or sudden death from cardiac arrhythmia, usually triggered by fasting or catabolic state. This disease responds to oral carnitine that, in pharmacological doses, enters cells using the amino acid transporter B(0,+). Primary carnitine deficiency can be suspected from the clinical presentation or identified by low levels of free carnitine (C0) in the newborn screening. Some adult patients have been diagnosed following the birth of an unaffected child with very low carnitine levels in the newborn screening. The diagnosis is confirmed by measuring low carnitine uptake in the patients' fibroblasts or by DNA sequencing of the SLC22A5 gene encoding the OCTN2 carnitine transporter. Some mutations are specific for certain ethnic backgrounds, but the majority are private and identified only in individual families. Although the genotype usually does not correlate with metabolic or cardiac involvement in primary carnitine deficiency, patients presenting as adults tend to have at least one missense mutation retaining residual activity. This article is part of a Special Issue entitled: Mitochondrial Channels edited by Pierre Sonveaux, Pierre Maechler and Jean-Claude Martinou.
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Affiliation(s)
- Nicola Longo
- Division of Medical Genetics, Department of Pediatrics, University of Utah, Salt Lake City, UT, USA; Department of Pathology, University of Utah, and ARUP Laboratories, 500 Chipeta Way, Salt Lake City, UT, USA.
| | - Marta Frigeni
- Division of Medical Genetics, Department of Pediatrics, University of Utah, Salt Lake City, UT, USA
| | - Marzia Pasquali
- Department of Pathology, University of Utah, and ARUP Laboratories, 500 Chipeta Way, Salt Lake City, UT, USA
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Reynolds S. Successful management of Barth syndrome: a systematic review highlighting the importance of a flexible and multidisciplinary approach. J Multidiscip Healthc 2015; 8:345-58. [PMID: 26251611 PMCID: PMC4524586 DOI: 10.2147/jmdh.s54802] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
This review describes and summarizes the available evidence related to the treatment and management of Barth syndrome. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) standards were used to identify articles published between December 2004 and January 2015. The Cochrane Population, Intervention, Control, Outcome, Study Design (PICOS) approach was used to guide the article selection and evaluation process. Of the 128 articles screened, 28 articles matched the systematic review inclusion criteria. The results of this review indicate the need for a flexible and multidisciplinary approach to manage the symptoms most commonly associated with Barth syndrome. It is recommended that a comprehensive care team should include individuals with Barth syndrome, their family members and caregivers, as well as medical, rehabilitative, nutritional, psychological, and educational professionals. The evidence for specific treatments, therapies, and techniques for individuals with Barth syndrome is currently lacking in both quality and quantity.
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Affiliation(s)
- Stacey Reynolds
- Department of Occupational Therapy, Virginia Commonwealth University, Richmond, VA, USA
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Horiuchi M, Nakakuma M, Arimura E, Ushikai M, Yoshida G. [Experimental Approach to Analysis of the Relationship between Food Environments and Lifestyle-Related Diseases, Including Cardiac Hypertrophy, Fatty Liver, and Fatigue Symptoms]. Nihon Eiseigaku Zasshi 2015; 70:110-4. [PMID: 25994341 DOI: 10.1265/jjh.70.110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The food habit is involved in the onset and development of lifestyle-related diseases. In this review I would like to describe a historical case of vitamin B1 deficiency, as well as our case study of fatty acid metabolism abnormality due to carnitine deficiency. In history, the army and navy personnel in Japan at the end of the 19th century received food rations based on a high-carbohydrate diet including white rice, resulting in the onset of beriberi. An epidemiological study by Kenkan Takaki revealed the relationship between the onset of beriberi and rice intake. Then, Takaki was successful in preventing the onset of beriberi by changing the diet. However, the primary cause had yet to be elucidated. Finally, Christian Eijkman established an animal model of beriberi (chickens) showing peripheral neuropathy, and he identified the existence of an anti-beriberi substance, vitamin B1. This is an example of the successful control of a disease by integrating the results of epidemiological and experimental studies. In our study using a murine model of fatty acid metabolism abnormality caused by carnitine deficiency, cardiac abnormality and fatty liver developed depending on the amount of dietary fat. In addition, the mice showed disturbance of orexin neuron activity related to the sleep-arousal system, which is involved in fatigue symptoms under fasting condition, one of the states showing enhanced fatty acid metabolism. These findings suggest that fatty acid toxicity is enhanced when the mice are more dependent on fatty acid metabolism. Almost simultaneously, a human epidemiological study showed that narcolepsy, which is caused by orexin system abnormality, is associated with the polymorphism of the gene coding for carnitine palmitoyltransferase 1B, which is involved in carnitine metabolism. To understand the pathological mechanism of fatty acid toxicity, not only an experimental approach using animal models, but also an epidemiological approach is necessary. The results will be applied to preventing and treating lifestyle-related diseases associated with fatty acid metabolism abnormality.
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Affiliation(s)
- Masahisa Horiuchi
- Department of Hygiene and Health Promotion Medicine, Kagoshima University Graduate School of Medical and Dental Sciences
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Shan T, Zhang P, Bi P, Kuang S. Lkb1 deletion promotes ectopic lipid accumulation in muscle progenitor cells and mature muscles. J Cell Physiol 2015; 230:1033-41. [PMID: 25251157 DOI: 10.1002/jcp.24831] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Accepted: 09/19/2014] [Indexed: 12/25/2022]
Abstract
Excessive intramyocellular triglycerides (muscle lipids) are associated with reduced contractile function, insulin resistance, and Type 2 diabetes, but what governs lipid accumulation in muscle is unclear. Here we report a role of Lkb1 in regulating lipid metabolism in muscle stem cells and their descendent mature muscles. We used Myod(Cre) and Lkb1(flox/flox) mice to specifically delete Lkb1 in myogenic cells including stem and differentiated cells, and examined the lipid accumulation and gene expression of myoblasts cultured from muscle stem cells (satellite cells). Genetic deletion of Lkb1 in myogenic progenitors led to elevated expression of lipogenic genes and ectopic lipid accumulation in proliferating myoblasts. Interestingly, the Lkb1-deficient myoblasts differentiated into adipocyte-like cells upon adipogenic induction. However, these adipocyte-like cells maintained myogenic gene expression with reduced ability to form myotubes efficiently. Activation of AMPK by AICAR prevented ectopic lipid formation in the Lkb1-null myoblasts. Notably, Lkb1-deficient muscles accumulated excessive lipids in vivo in response to high-fat diet feeding. These results demonstrate that Lkb1 acts through AMPK to limit lipid deposition in muscle stem cells and their derivative mature muscles, and point to the possibility of controlling muscle lipid content using AMPK activating drugs.
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Affiliation(s)
- Tizhong Shan
- Department of Animal Science, Purdue University, West Lafayette, Indiana
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Schlattner U, Tokarska-Schlattner M, Epand RM, Boissan M, Lacombe ML, Klein-Seetharaman J, Kagan VE. Mitochondrial NM23-H4/NDPK-D: a bifunctional nanoswitch for bioenergetics and lipid signaling. Naunyn Schmiedebergs Arch Pharmacol 2014; 388:271-8. [PMID: 25231795 DOI: 10.1007/s00210-014-1047-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Accepted: 09/08/2014] [Indexed: 12/12/2022]
Abstract
A novel paradigm for the function of the mitochondrial nucleoside diphosphate kinase NM23-H4/NDPK-D is proposed: acting as a bifunctional nanoswitch in bioenergetics and cardiolipin (CL) trafficking and signaling. Similar to some other mitochondrial proteins like cytochrome c or AIF, NM23-H4 seems to have dual functions in bioenergetics and apoptotic signaling. In its bioenergetic phosphotransfer mode, the kinase reversibly phosphorylates NDPs into NTPs, driven by mitochondrially generated ATP. Among others, this reaction can locally supply GTP to mitochondrial GTPases as shown for the dynamin-like GTPase OPA1, found in a complex together with NM23-H4. Further, NM23-H4 is functionally coupled to adenylate translocase (ANT) of the mitochondrial inner membrane (MIM), so generated ADP can stimulate respiration to rapidly regenerate ATP. The lipid transfer mode of NM23-H4 can support, dependent on the presence of CL, the transfer of anionic lipids between membranes in vitro and the sorting of CL from its mitochondrial sites of synthesis (MIM) to the mitochondrial outer membrane (MOM) in vivo. Such (partial) collapse of MIM/MOM CL asymmetry results in CL externalization on the mitochondrial surface, where CL can serve as pro-apoptotic or pro-mitophagic "eat me"-signal. The functional state of NM23-H4 depends on its degree of CL-membrane interaction. In vitro assays have shown that only NM23-H4 that fully cross-links two membranes is lipid transfer competent, but at the same time phosphotransfer (kinase) inactive. Thus, the two functions of NM23-H4 seem to be mutually exclusive. This novel mitochondrial regulatory circuit has potential for the development of interventions in various human pathologies.
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Affiliation(s)
- Uwe Schlattner
- Laboratory of Fundamental and Applied Bioenergetics (LBFA) and SFR Environmental and Systems Biology (BEeSy), University Grenoble Alpes, Grenoble, France,
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Grounds MD, Terrill JR, Radley-Crabb HG, Robertson T, Papadimitriou J, Spuler S, Shavlakadze T. Lipid accumulation in dysferlin-deficient muscles. THE AMERICAN JOURNAL OF PATHOLOGY 2014; 184:1668-76. [PMID: 24685690 DOI: 10.1016/j.ajpath.2014.02.005] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 02/21/2014] [Accepted: 02/25/2014] [Indexed: 02/01/2023]
Abstract
Dysferlin is a membrane associated protein involved in vesicle trafficking and fusion. Defects in dysferlin result in limb-girdle muscular dystrophy type 2B and Miyoshi myopathy in humans and myopathy in A/J(dys-/-) and BLAJ mice, but the pathomechanism of the myopathy is not understood. Oil Red O staining showed many lipid droplets within the psoas and quadriceps muscles of dysferlin-deficient A/J(dys-/-) mice aged 8 and 12 months, and lipid droplets were also conspicuous within human myofibers from patients with dysferlinopathy (but not other myopathies). Electron microscopy of 8-month-old A/J(dys-/-) psoas muscles confirmed lipid droplets within myofibers and showed disturbed architecture of myofibers. In addition, the presence of many adipocytes was confirmed, and a possible role for dysferlin in adipocytes is suggested. Increased expression of mRNA for a gene involved in early lipogenesis, CCAAT/enhancer binding protein-δ, in 3-month-old A/J(dys-/-) quadriceps (before marked histopathology is evident), indicates early induction of lipogenesis/adipogenesis within dysferlin-deficient muscles. Similar results were seen for dysferlin-deficient BLAJ mice. These novel observations of conspicuous intermyofibrillar lipid and progressive adipocyte replacement in dysferlin-deficient muscles present a new focus for investigating the mechanisms that result in the progressive decline of muscle function in dysferlinopathies.
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Affiliation(s)
- Miranda D Grounds
- Schools of Anatomy, Physiology and Human Biology, University of Western Australia, Perth, Australia.
| | - Jessica R Terrill
- Schools of Anatomy, Physiology and Human Biology, University of Western Australia, Perth, Australia
| | - Hannah G Radley-Crabb
- Schools of Anatomy, Physiology and Human Biology, University of Western Australia, Perth, Australia; CHIRI Biosciences Research Precinct, School of Biomedical Sciences, Curtin University, Perth, Australia
| | - Terry Robertson
- Pathology and Laboratory Medicine, University of Western Australia, Perth, Australia
| | - John Papadimitriou
- Pathology and Laboratory Medicine, University of Western Australia, Perth, Australia
| | - Simone Spuler
- Muscle Research Unit, Experimental and Clinical Research Center, Berlin, Germany
| | - Tea Shavlakadze
- Schools of Anatomy, Physiology and Human Biology, University of Western Australia, Perth, Australia
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Roura S, Gálvez-Montón C, Pujal JM, Casani L, Fernández MA, Astier L, Gastelurrutia P, Domingo M, Prat-Vidal C, Soler-Botija C, Llucià-Valldeperas A, Llorente-Cortés V, Bayes-Genis A. New insights into lipid raft function regulating myocardial vascularization competency in human idiopathic dilated cardiomyopathy. Atherosclerosis 2013; 230:354-64. [DOI: 10.1016/j.atherosclerosis.2013.08.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Revised: 07/26/2013] [Accepted: 08/06/2013] [Indexed: 12/15/2022]
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Mu X, Usas A, Tang Y, Lu A, Wang B, Weiss K, Huard J. RhoA mediates defective stem cell function and heterotopic ossification in dystrophic muscle of mice. FASEB J 2013; 27:3619-31. [PMID: 23704088 DOI: 10.1096/fj.13-233460] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Heterotopic ossification (HO) and fatty infiltration (FI) often occur in diseased skeletal muscle and have been previously described in various animal models of Duchenne muscular dystrophy (DMD); however, the pathological mechanisms remain largely unknown. Dystrophin-deficient mdx mice and dystrophin/utrophin double-knockout (dKO) mice are mouse models of DMD; however, mdx mice display a strong muscle regeneration capacity, while dKO mice exhibit a much more severe phenotype, which is similar to patients with DMD. Our results revealed that more extensive HO, but not FI, occurred in the skeletal muscle of dKO mice versus mdx mice, and RhoA activation specifically occurred at the sites of HO. Moreover, the gene expression of RhoA, BMPs, and several inflammatory factors were significantly up-regulated in muscle stem cells isolated from dKO mice; while inactivation of RhoA in the cells with RhoA/ROCK inhibitor Y-27632 led to reduced osteogenic potential and improved myogenic potential. Finally, inactivation of RhoA signaling in the dKO mice with Y-27632 improved muscle regeneration and reduced the expression of BMPs, inflammation, HO, and intramyocellular lipid accumulation in both skeletal and cardiac muscle. Our results revealed that RhoA represents a major molecular switch in the regulation of HO and muscle regeneration in dystrophic skeletal muscle of mice.
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Affiliation(s)
- Xiaodong Mu
- Stem Cell Research Center, Department of Orthopaedic Surgery, University of Pittsburgh, 450 Technology Dr., Pittsburgh, PA 15219, USA
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Vantyghem MC, Balavoine AS, Douillard C, Defrance F, Dieudonne L, Mouton F, Lemaire C, Bertrand-Escouflaire N, Bourdelle-Hego MF, Devemy F, Evrard A, Gheerbrand D, Girardot C, Gumuche S, Hober C, Topolinski H, Lamblin B, Mycinski B, Ryndak A, Karrouz W, Duvivier E, Merlen E, Cortet C, Weill J, Lacroix D, Wémeau JL. How to diagnose a lipodystrophy syndrome. ANNALES D'ENDOCRINOLOGIE 2012; 73:170-89. [PMID: 22748602 DOI: 10.1016/j.ando.2012.04.010] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Accepted: 04/25/2012] [Indexed: 11/15/2022]
Abstract
The spectrum of adipose tissue diseases ranges from obesity to lipodystrophy, and is accompanied by insulin resistance syndrome, which promotes the occurrence of type 2 diabetes, dyslipidemia and cardiovascular complications. Lipodystrophy refers to a group of rare diseases characterized by the generalized or partial absence of adipose tissue, and occurs with or without hypertrophy of adipose tissue in other sites. They are classified as being familial or acquired, and generalized or partial. The genetically determined partial forms usually occur as Dunnigan syndrome, which is a type of laminopathy that can also manifest as muscle, cardiac, neuropathic or progeroid involvement. Gene mutations encoding for PPAR-gamma, Akt2, CIDEC, perilipin and the ZMPSTE 24 enzyme are much more rare. The genetically determined generalized forms are also very rare and are linked to mutations of seipin AGPAT2, FBN1, which is accompanied by Marfan syndrome, or of BANF1, which is characterized by a progeroid syndrome without insulin resistance and with early bone complications. Glycosylation disorders are sometimes involved. Some genetically determined forms have recently been found to be due to autoinflammatory syndromes linked to a proteasome anomaly (PSMB8). They result in a lipodystrophy syndrome that occurs secondarily with fever, dermatosis and panniculitis. Then there are forms that are considered to be acquired. They may be iatrogenic (protease inhibitors in HIV patients, glucocorticosteroids, insulin, graft-versus-host disease, etc.), related to an immune system disease (sequelae of dermatopolymyositis, autoimmune polyendocrine syndromes, particularly associated with type 1 diabetes, Barraquer-Simons and Lawrence syndromes), which are promoted by anomalies of the complement system. Finally, lipomatosis is currently classified as a painful form (adiposis dolorosa or Dercum's disease) or benign symmetric multiple form, also known as Launois-Bensaude syndrome or Madelung's disease, which are sometimes related to mitochondrial DNA mutations, but are usually promoted by alcohol. In addition to the medical management of metabolic syndrome and the sometimes surgical treatment of lipodystrophy, recombinant leptin provides hope for genetically determined lipodystrophy syndromes, whereas modifications in antiretroviral treatment and tesamorelin, a GHRH analog, is effective in the metabolic syndrome of HIV patients. Other therapeutic options will undoubtedly be developed, dependent on pathophysiological advances, which today tend to classify genetically determined lipodystrophy as being related to laminopathy or to lipid droplet disorders.
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Affiliation(s)
- Marie-Christine Vantyghem
- Inserm U859, service d'endocrinologie et maladies métaboliques, hôpital Huriez, CHRU de Lille, 1, rue Polonovski, 59000 Lille, France.
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