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Walker MA, Chen H, Yadav A, Ritterhoff J, Villet O, McMillen T, Wang Y, Purcell H, Djukovic D, Raftery D, Isoherranen N, Tian R. Raising NAD + Level Stimulates Short-Chain Dehydrogenase/Reductase Proteins to Alleviate Heart Failure Independent of Mitochondrial Protein Deacetylation. Circulation 2023; 148:2038-2057. [PMID: 37965787 PMCID: PMC10842390 DOI: 10.1161/circulationaha.123.066039] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 10/04/2023] [Indexed: 11/16/2023]
Abstract
BACKGROUND Strategies to increase cellular NAD+ (oxidized nicotinamide adenine dinucleotide) level have prevented cardiac dysfunction in multiple models of heart failure, but molecular mechanisms remain unclear. Little is known about the benefits of NAD+-based therapies in failing hearts after the symptoms of heart failure have appeared. Most pretreatment regimens suggested mechanisms involving activation of sirtuin, especially Sirt3 (sirtuin 3), and mitochondrial protein acetylation. METHODS We induced cardiac dysfunction by pressure overload in SIRT3-deficient (knockout) mice and compared their response with nicotinamide riboside chloride treatment with wild-type mice. To model a therapeutic approach, we initiated the treatment in mice with established cardiac dysfunction. RESULTS We found nicotinamide riboside chloride improved mitochondrial function and blunted heart failure progression. Similar benefits were observed in wild-type and knockout mice. Boosting NAD+ level improved the function of NAD(H) redox-sensitive SDR (short-chain dehydrogenase/reductase) family proteins. Upregulation of Mrpp2 (mitochondrial ribonuclease P protein 2), a multifunctional SDR protein and a subunit of mitochondrial ribonuclease P, improves mitochondrial DNA transcripts processing and electron transport chain function. Activation of SDRs in the retinol metabolism pathway stimulates RXRα (retinoid X receptor α)/PPARα (proliferator-activated receptor α) signaling and restores mitochondrial oxidative metabolism. Downregulation of Mrpp2 and impaired mitochondrial ribonuclease P were found in human failing hearts, suggesting a shared mechanism of defective mitochondrial biogenesis in mouse and human heart failure. CONCLUSIONS These findings identify SDR proteins as important regulators of mitochondrial function and molecular targets of NAD+-based therapy. Furthermore, the benefit is observed regardless of Sirt3-mediated mitochondrial protein deacetylation, a widely held mechanism for NAD+-based therapy for heart failure. The data also show that NAD+-based therapy can be useful in pre-existing heart failure.
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Affiliation(s)
- Matthew A. Walker
- Mitochondria and Metabolism Center, Department of
Anesthesiology & Pain Medicine, University of Washington, Seattle, WA
98109
| | - Hongye Chen
- Mitochondria and Metabolism Center, Department of
Anesthesiology & Pain Medicine, University of Washington, Seattle, WA
98109
| | - Aprajita Yadav
- Department of Pharmaceutics, School of Pharmacy, University
of Washington, Seattle, WA 98195
| | - Julia Ritterhoff
- Mitochondria and Metabolism Center, Department of
Anesthesiology & Pain Medicine, University of Washington, Seattle, WA
98109
| | - Outi Villet
- Mitochondria and Metabolism Center, Department of
Anesthesiology & Pain Medicine, University of Washington, Seattle, WA
98109
| | - Tim McMillen
- Mitochondria and Metabolism Center, Department of
Anesthesiology & Pain Medicine, University of Washington, Seattle, WA
98109
| | - Yuliang Wang
- Department of Computer Science & Engineering,
University of Washington, Seattle, WA 98195
| | - Hayley Purcell
- Mitochondria and Metabolism Center, Department of
Anesthesiology & Pain Medicine, University of Washington, Seattle, WA
98109
| | - Danijel Djukovic
- Mitochondria and Metabolism Center, Department of
Anesthesiology & Pain Medicine, University of Washington, Seattle, WA
98109
| | - Daniel Raftery
- Mitochondria and Metabolism Center, Department of
Anesthesiology & Pain Medicine, University of Washington, Seattle, WA
98109
| | - Nina Isoherranen
- Department of Pharmaceutics, School of Pharmacy, University
of Washington, Seattle, WA 98195
| | - Rong Tian
- Mitochondria and Metabolism Center, Department of
Anesthesiology & Pain Medicine, University of Washington, Seattle, WA
98109
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Yin J, Li Y, Tian Y, Zhou F, Ma J, Xia S, Yang T, Ma L, Zeng Q, Liu G, Yin Y, Huang X. Obese Ningxiang pig-derived microbiota rewires carnitine metabolism to promote muscle fatty acid deposition in lean DLY pigs. Innovation (N Y) 2023; 4:100486. [PMID: 37636278 PMCID: PMC10448216 DOI: 10.1016/j.xinn.2023.100486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 07/24/2023] [Indexed: 08/29/2023] Open
Abstract
The gut microbiota consistently shows strong correlations with lipid metabolism in humans and animals, and whether the gut microbiota contributes to muscle fatty acid (FA) deposition and meat traits in farm animals has not been fully resolved. In this study, we aimed to unveil the microbial mechanisms underlying muscle FA deposition in pigs. First, we systematically revealed the correlation between the gut microbiome and muscle FA levels in 43 obese Ningxiang pigs and 50 lean Duroc Landrace Yorkshire (DLY) pigs. Mutual fecal microbial transplantation showed that the obese Ningxiang pig-derived microbiota increased the muscle FA content and improved meat quality by reshaping the gut microbial composition in lean DLY pigs. Lactobacillus reuteri has been identified as a potential microbial biomarker in obese Ningxiang pig-derived microbiota-challenged DLY pigs. A gavage experiment using lean DLY pigs confirmed that L. reuteri XL0930 isolated from obese Ningxiang pigs was the causal species that increased the muscle FA content. Mechanistically, SLC22A5, a carnitine transporter, was downregulated in L. reuteri XL0930-fed DLY pigs, resulting in reduced muscle carnitine levels. Muscle and intestinal L-carnitine levels, which correlated with the muscle FA content, impeded fat synthesis and FA accumulation in in vitro and in vivo models. In conclusion, we uncovered an unexpected and important role of the obese Ningxiang pig-derived microbiota in regulating muscle FA metabolism via the SLC22A5-mediated carnitine system.
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Affiliation(s)
- Jie Yin
- College of Animal Science and Technology, Hunan Agriculture University, Changsha 410128, China
| | - Yunxia Li
- College of Animal Science and Technology, Hunan Agriculture University, Changsha 410128, China
| | - Yu Tian
- College of Animal Science and Technology, Hunan Agriculture University, Changsha 410128, China
| | - Feng Zhou
- College of Animal Science and Technology, Hunan Agriculture University, Changsha 410128, China
| | - Jie Ma
- College of Animal Science and Technology, Hunan Agriculture University, Changsha 410128, China
| | - Siting Xia
- College of Animal Science and Technology, Hunan Agriculture University, Changsha 410128, China
| | - Tong Yang
- College of Animal Science and Technology, Hunan Agriculture University, Changsha 410128, China
| | - Libao Ma
- College of Animal Sciences and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Qinghua Zeng
- College of Animal Science and Technology, Hunan Agriculture University, Changsha 410128, China
- Hunan Chuweixiang Agriculture and Animal Husbandry Co., Ltd., Ningxiang 410600, China
| | - Gang Liu
- College of Animal Science and Technology, Hunan Agriculture University, Changsha 410128, China
| | - Yulong Yin
- College of Animal Science and Technology, Hunan Agriculture University, Changsha 410128, China
- Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Xingguo Huang
- College of Animal Science and Technology, Hunan Agriculture University, Changsha 410128, China
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3
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Phung NV, Rong F, Xia WY, Fan Y, Li XY, Wang SA, Li FL. Nervonic acid and its sphingolipids: Biological functions and potential food applications. Crit Rev Food Sci Nutr 2023:1-20. [PMID: 37114919 DOI: 10.1080/10408398.2023.2203753] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
Nervonic acid, a 24-carbon fatty acid with only one double bond at the 9th carbon (C24:1n-9), is abundant in the human brain, liver, and kidney. It not only functions in free form but also serves as a critical component of sphingolipids which participate in many biological processes such as cell membrane formation, apoptosis, and neurotransmission. Recent studies show that nervonic acid supplementation is not only beneficial to human health but also can improve the many medical conditions such as neurological diseases, cancers, diabetes, obesity, and their complications. Nervonic acid and its sphingomyelins serve as a special material for myelination in infants and remyelination patients with multiple sclerosis. Besides, the administration of nervonic acid is reported to reduce motor disorder in mice with Parkinson's disease and limit weight gain. Perturbations of nervonic acid and its sphingolipids might lead to the pathogenesis of many diseases and understanding these mechanisms is critical for investigating potential therapeutic approaches for such diseases. However, available studies about this aspect are limited. In this review, relevant findings about functional mechanisms of nervonic acid have been comprehensively and systematically described, focusing on four interconnected functions: cellular structure, signaling, anti-inflammation, lipid mobilization, and their related diseases.
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Affiliation(s)
- Nghi Van Phung
- Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao C1 Refinery Engineering Research Center, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China
| | - Fei Rong
- Department of Anesthesiology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, China
| | - Wan Yue Xia
- Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao C1 Refinery Engineering Research Center, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China
| | - Yong Fan
- Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao C1 Refinery Engineering Research Center, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China
- Qingdao New Energy Shandong Laboratory, Qingdao, China
| | - Xian Yu Li
- China Academy of Chinese Medical Sciences, Beijing, China
| | - Shi An Wang
- Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao C1 Refinery Engineering Research Center, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China
- Shandong Energy Institute, Qingdao, China
| | - Fu Li Li
- Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao C1 Refinery Engineering Research Center, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China
- Qingdao New Energy Shandong Laboratory, Qingdao, China
- Shandong Energy Institute, Qingdao, China
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4
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Pike B, Zhao J, Hicks JA, Wang F, Hagen R, Liu HC, Odle J, Lin X. Intestinal Carnitine Status and Fatty Acid Oxidation in Response to Clofibrate and Medium-Chain Triglyceride Supplementation in Newborn Pigs. Int J Mol Sci 2023; 24:ijms24076066. [PMID: 37047049 PMCID: PMC10094207 DOI: 10.3390/ijms24076066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/13/2023] [Accepted: 03/15/2023] [Indexed: 04/14/2023] Open
Abstract
To investigate the role of peroxisome proliferator-activated receptor alpha (PPARα) in carnitine status and intestinal fatty acid oxidation in neonates, a total of 72 suckled newborn piglets were assigned into 8 dietary treatments following a 2 (±0.35% clofibrate) × 4 (diets with: succinate+glycerol (Succ), tri-valerate (TC5), tri-hexanoate (TC6), or tri-2-methylpentanoate (TMPA)) factorial design. All pigs received experimental milk diets with isocaloric energy for 5 days. Carnitine statuses were evaluated, and fatty acid oxidation was measured in vitro using [1-14C]-palmitic acid (1 mM) as a substrate in absence or presence of L659699 (1.6 µM), iodoacetamide (50 µM), and carnitine (1 mM). Clofibrate increased concentrations of free (41%) and/or acyl-carnitine (44% and 15%) in liver and plasma but had no effects in the intestine. The effects on carnitine status were associated with the expression of genes involved in carnitine biosynthesis, absorption, and transportation. TC5 and TMPA stimulated the increased fatty acid oxidation rate induced by clofibrate, while TC6 had no effect on the increased fatty acid oxidation induced by clofibrate (p > 0.05). These results suggest that dietary clofibrate improved carnitine status and increased fatty acid oxidation. Propionyl-CoA, generated from TC5 and TMPA, could stimulate the increased fatty acid oxidation rate induced by clofibrate as anaplerotic carbon sources.
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Affiliation(s)
- Brandon Pike
- Laboratory of Developmental Nutrition, Department of Animal Sciences, North Carolina State University, Raleigh, NC 27695, USA
| | - Jinan Zhao
- Laboratory of Developmental Nutrition, Department of Animal Sciences, North Carolina State University, Raleigh, NC 27695, USA
| | - Julie A Hicks
- Laboratory of Developmental Nutrition, Department of Animal Sciences, North Carolina State University, Raleigh, NC 27695, USA
| | - Feng Wang
- Laboratory of Developmental Nutrition, Department of Animal Sciences, North Carolina State University, Raleigh, NC 27695, USA
| | - Rachel Hagen
- Laboratory of Developmental Nutrition, Department of Animal Sciences, North Carolina State University, Raleigh, NC 27695, USA
| | - Hsiao-Ching Liu
- Laboratory of Developmental Nutrition, Department of Animal Sciences, North Carolina State University, Raleigh, NC 27695, USA
| | - Jack Odle
- Laboratory of Developmental Nutrition, Department of Animal Sciences, North Carolina State University, Raleigh, NC 27695, USA
| | - Xi Lin
- Laboratory of Developmental Nutrition, Department of Animal Sciences, North Carolina State University, Raleigh, NC 27695, USA
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5
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Pagnotti GM, Trivedi T, Wright LE, John SK, Murthy S, Pattyn RR, Willis MS, She Y, Suresh S, Thompson WR, Rubin CT, Mohammad KS, Guise TA. Low-Magnitude Mechanical Signals Combined with Zoledronic Acid Reduce Musculoskeletal Weakness and Adiposity in Estrogen-Deprived Mice. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.03.12.531571. [PMID: 36993656 PMCID: PMC10054938 DOI: 10.1101/2023.03.12.531571] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
UNLABELLED Combination treatment of Low-Intensity Vibration (LIV) with zoledronic acid (ZA) was hypothesized to preserve bone mass and muscle strength while reducing adipose tissue accrual associated with complete estrogen (E 2 )-deprivation in young and skeletally mature mice. Complete E 2 -deprivation (surgical-ovariectomy (OVX) and daily injection of aromatase inhibitor (AI) letrozole) were performed on 8-week-old C57BL/6 female mice for 4 weeks following commencement of LIV administration or control (no LIV), for 28 weeks. Additionally, 16-week-old C57BL/6 female E 2 -deprived mice were administered ±LIV twice daily and supplemented with ±ZA (2.5 ng/kg/week). By week 28, lean tissue mass quantified by dual-energy X-ray absorptiometry was increased in younger OVX/AI+LIV(y) mice, with increased myofiber cross-sectional area of quadratus femorii. Grip strength was greater in OVX/AI+LIV(y) mice than OVX/AI(y) mice. Fat mass remained lower in OVX/AI+LIV(y) mice throughout the experiment compared with OVX/AI(y) mice. OVX/AI+LIV(y) mice exhibited increased glucose tolerance and reduced leptin and free fatty acids than OVX/AI(y) mice. Trabecular bone volume fraction and connectivity density increased in the vertebrae of OVX/AI+LIV(y) mice compared to OVX/AI(y) mice; however, this effect was attenuated in the older cohort of E 2 -deprived mice, specifically in OVX/AI+ZA mice, requiring combined LIV with ZA to increase trabecular bone volume and strength. Similar improvements in cortical bone thickness and cross-sectional area of the femoral mid-diaphysis were observed in OVX/AI+LIV+ZA mice, resulting in greater fracture resistance. Our findings demonstrate that the combination of mechanical signals in the form of LIV and anti-resorptive therapy via ZA improve vertebral trabecular bone and femoral cortical bone, increase lean mass, and reduce adiposity in mice undergoing complete E 2 -deprivation. One Sentence Summary: Low-magnitude mechanical signals with zoledronic acid suppressed bone and muscle loss and adiposity in mice undergoing complete estrogen deprivation. TRANSLATIONAL RELEVANCE Postmenopausal patients with estrogen receptor-positive breast cancer treated with aromatase inhibitors to reduce tumor progression experience deleterious effects to bone and muscle subsequently develop muscle weakness, bone fragility, and adipose tissue accrual. Bisphosphonates (i.e., zoledronic acid) prescribed to inhibit osteoclast-mediated bone resorption are effective in preventing bone loss but may not address the non-skeletal effects of muscle weakness and fat accumulation that contribute to patient morbidity. Mechanical signals, typically delivered to the musculoskeletal system during exercise/physical activity, are integral for maintaining bone and muscle health; however, patients undergoing treatments for breast cancer often experience decreased physical activity which further accelerates musculoskeletal degeneration. Low-magnitude mechanical signals, in the form of low-intensity vibrations, generate dynamic loading forces similar to those derived from skeletal muscle contractility. As an adjuvant to existing treatment strategies, low-intensity vibrations may preserve or rescue diminished bone and muscle degraded by breast cancer treatment.
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PGC-1α and MEF2 Regulate the Transcription of the Carnitine Transporter OCTN2 Gene in C2C12 Cells and in Mouse Skeletal Muscle. Int J Mol Sci 2022; 23:ijms232012304. [PMID: 36293168 PMCID: PMC9604316 DOI: 10.3390/ijms232012304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 10/04/2022] [Accepted: 10/05/2022] [Indexed: 11/05/2022] Open
Abstract
OCTN2 (SLC22A5) is a carnitine transporter whose main function is the active transport of carnitine into cells. In skeletal muscle and other organs, the regulation of the SLC22A5 gene transcription has been shown to depend on the nuclear transcription factor PPAR-α. Due to the observation that the muscle OCTN2 mRNA level is maintained in PPAR-α knock-out mice and that PGC-1α overexpression in C2C12 myoblasts increases OCTN2 mRNA expression, we suspected additional regulatory pathways for SLC22A5 gene transcription. Indeed, we detected several binding sites of the myocyte-enhancing factor MEF2 in the upstream region of the SLC22A5 gene, and MEF2C/MEF2D stimulated the activity of the OCTN2 promoter in gene reporter assays. This stimulation was increased by PGC-1α and was blunted for a SLC22A5 promoter fragment with a mutated MEF2 binding site. Further, we demonstrated the specific binding of MEF2 to the SLC22A5 gene promoter, and a supershift of the MEF2/DNA complex in electrophoretic mobility shift assays. In immunoprecipitation experiments, we could demonstrate the interaction between PGC-1α and MEF2. In addition, SB203580, a specific inhibitor of p38 MAPK, blocked and interferon-γ stimulated the transcriptional activity of the SLC22A5 gene promoter. Finally, mice with muscle-specific overexpression of OCTN2 showed an increase in OCTN2 mRNA and protein expression in skeletal muscle. In conclusion, we detected and characterized a second stimulatory pathway of SLC22A5 gene transcription in skeletal muscle, which involves the nuclear transcription factor MEF2 and co-stimulation by PGC-1α and which is controlled by the p38 MAPK signaling cascade.
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7
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Zhou S, Shu Y. Transcriptional Regulation of Solute Carrier (SLC) Drug Transporters. Drug Metab Dispos 2022; 50:DMD-MR-2021-000704. [PMID: 35644529 PMCID: PMC9488976 DOI: 10.1124/dmd.121.000704] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 05/02/2022] [Accepted: 05/16/2022] [Indexed: 09/03/2023] Open
Abstract
Facilitated transport is necessitated for large size, charged, and/or hydrophilic drugs to move across the membrane. The drug transporters in the solute carrier (SLC) superfamily, mainly including organic anion-transporting polypeptides (OATPs), organic anion transporters (OATs), organic cation transporters (OCTs), organic cation/carnitine transporters (OCTNs), peptide transporters (PEPTs), and multidrug and toxin extrusion proteins (MATEs), are critical facilitators of drug transport and distribution in human body. The expression of these SLC drug transporters is found in tissues throughout the body, with high abundance in the epithelial cells of major organs for drug disposition, such as intestine, liver, and kidney. These SLC drug transporters are clinically important in drug absorption, metabolism, distribution, and excretion. The mechanisms underlying their regulation have been revealing in recent years. Epigenetic and nuclear receptor-mediated transcriptional regulation of SLC drug transporters have particularly attracted much attention. This review focuses on the transcriptional regulation of major SLC drug transporter genes. Revealing the mechanisms underlying the transcription of those critical drug transporters will help us understand pharmacokinetics and pharmacodynamics, ultimately improving drug therapeutic effectiveness while minimizing drug toxicity. Significance Statement It has become increasingly recognized that solute carrier (SLC) drug transporters play a crucial, and sometimes determinative, role in drug disposition and response, which is reflected in decision-making during not only clinical drug therapy but also drug development. Understanding the mechanisms accounting for the transcription of these transporters is critical to interpret their abundance in various tissues under different conditions, which is necessary to clarify the pharmacological response, adverse effects, and drug-drug interactions for clinically used drugs.
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Affiliation(s)
- Shiwei Zhou
- Pharmaceutical Sciences, University of Maryland, United States
| | - Yan Shu
- Pharmaceutical Sciences, University of Maryland, United States
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8
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PPAR Alpha as a Metabolic Modulator of the Liver: Role in the Pathogenesis of Nonalcoholic Steatohepatitis (NASH). BIOLOGY 2022; 11:biology11050792. [PMID: 35625520 PMCID: PMC9138523 DOI: 10.3390/biology11050792] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 05/17/2022] [Accepted: 05/18/2022] [Indexed: 12/31/2022]
Abstract
Simple Summary In the context of liver disease, one of the more growing public health problems is the transition from simple steatosis to non-alcoholic steatohepatitis. Profound metabolic dysregulations linked to inflammation and hepatic injury are features of non-alcoholic steatohepatitis. Since the peroxisomal-proliferator-activated receptor alpha has long been considered one of the key transcriptional factors in hepatic metabolism, its role in the pathogenesis of non-alcoholic steatohepatitis is discussed in this review. Abstract The strong relationship between metabolic alterations and non-alcoholic steatohepatitis (NASH) suggests a pathogenic interplay. However, many aspects have not yet been fully clarified. Nowadays, NASH is becoming the main cause of liver-associated morbidity and mortality. Therefore, an effort to understand the mechanisms underlying the pathogenesis of NASH is critical. Among the nuclear receptor transcription factors, peroxisome-proliferator-activated receptor alpha (PPARα) is highly expressed in the liver, where it works as a pivotal transcriptional regulator of the intermediary metabolism. In this context, PPARα’s function in regulating the lipid metabolism is essential for proper liver functioning. Here, we review metabolic liver genes under the control of PPARα and discuss how this aspect can impact the inflammatory condition and pathogenesis of NASH.
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9
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Shahidi M, Rahmani K, Afkhamzadeh A. Association of Abnormal Serum L-Carnitine Levels with Idiopathic Changes in Left Ventricular Geometry in Pediatric and Adolescent Patients. IRANIAN JOURNAL OF MEDICAL SCIENCES 2022; 47:256-263. [PMID: 35634522 PMCID: PMC9126894 DOI: 10.30476/ijms.2021.88464.1919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 03/30/2021] [Accepted: 04/27/2021] [Indexed: 11/06/2022]
Abstract
Background There is no compelling evidence to prove an association between serum free L-carnitine levels and changes in left ventricular (LV) geometry. The present study aimed to evaluate a possible association between these parameters. Methods In a cross-sectional study, 504 outpatients were randomly selected among those registered at Sanandaj Pediatric Heart Clinic (Sanandaj, Iran) during 2014-2020. The patients aged one to 25 years and were presented with cardiac complaints. The serum L-carnitine levels of all patients were evaluated and associated with changes in LV geometry measured by echocardiography. The association was assessed using the Chi squared test, Fisher's exact test, and one-way ANOVA with post hoc Tukey test. Data were analyzed using SPSS software (version 22.0). P≤0.05 was considered statistically significant. Results The mean serum L-carnitine levels in the normal, low, and high serum groups were 52.69, 14.16, and 178.67 nmol/dL, respectively. There was a significant statistical association between abnormal serum levels of free L-carnitine and changes in LV geometry (P<0.001). Conclusion Our findings are indicative of an association between abnormal serum L-carnitine levels and changes in LV geometry in pediatric and adolescent patients.
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Affiliation(s)
- Mohsen Shahidi
- Department of Pediatric Cardiology, Rajaiee Heart Center, Tehran, Iran
| | - Khaled Rahmani
- Liver and Digestive Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Abdorrahim Afkhamzadeh
- Social Determinants of Health Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
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Upadhyay A, Boyle KE, Broderick TL. The Effects of Streptozotocin-Induced Diabetes and Insulin Treatment on Carnitine Biosynthesis and Renal Excretion. Molecules 2021; 26:6872. [PMID: 34833964 PMCID: PMC8620001 DOI: 10.3390/molecules26226872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 11/09/2021] [Accepted: 11/10/2021] [Indexed: 11/16/2022] Open
Abstract
Carnitine insufficiency is reported in type 1 diabetes mellitus. To determine whether this is accompanied by defects in biosynthesis and/or renal uptake, liver and kidney were obtained from male Sprague-Dawley rats with streptozotocin-induced diabetes. Diabetic rats exhibited the metabolic consequences of type 1 diabetes, including hypoinsulinemia, hyperglycemia, and increased urine output. Systemic hypocarnitinemia, expressed as free carnitine levels, was evident in the plasma, liver, and kidney of diabetic rats. Compared to control rats, the low free carnitine in the plasma of diabetic rats was accompanied by decreased expression of γ-butyrobetaine hydroxylase in liver and kidney, suggesting impaired carnitine biosynthesis. Expression of organic cation transporter-2 in kidney was also reduced, indicating impaired renal reabsorption, and confirmed by the presence of elevated levels of free carnitine in the urine of diabetic rats. Insulin treatment of diabetic rats reversed the plasma hypocarnitinemia, increased the free carnitine content in both kidney and liver, and prevented urinary losses of free carnitine. This was associated with increased expression of γ-butyrobetaine hydroxylase and organic cation transporter-2. The results of our study indicate that type 1 diabetes induced with streptozotocin disrupts carnitine biosynthesis and renal uptake mechanisms, leading to carnitine insufficiency. These aberrations in carnitine homeostasis are prevented with daily insulin treatment.
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Affiliation(s)
- Aman Upadhyay
- Department of Biomedical Sciences, College of Graduate Studies, Midwestern University, Glendale, AZ 85308, USA;
| | - Kate E. Boyle
- Arizona College of Osteopathic Medicine, Midwestern University, Glendale, AZ 85308, USA;
| | - Tom L. Broderick
- Laboratory of Diabetes and Exercise Metabolism, Department of Physiology, College of Graduate Studies, Midwestern University, Glendale, AZ 85308, USA
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11
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Wang L, Cai Y, Jian L, Cheung CW, Zhang L, Xia Z. Impact of peroxisome proliferator-activated receptor-α on diabetic cardiomyopathy. Cardiovasc Diabetol 2021; 20:2. [PMID: 33397369 PMCID: PMC7783984 DOI: 10.1186/s12933-020-01188-0] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 12/02/2020] [Indexed: 12/21/2022] Open
Abstract
The prevalence of cardiomyopathy is higher in diabetic patients than those without diabetes. Diabetic cardiomyopathy (DCM) is defined as a clinical condition of abnormal myocardial structure and performance in diabetic patients without other cardiac risk factors, such as coronary artery disease, hypertension, and significant valvular disease. Multiple molecular events contribute to the development of DCM, which include the alterations in energy metabolism (fatty acid, glucose, ketone and branched chain amino acids) and the abnormalities of subcellular components in the heart, such as impaired insulin signaling, increased oxidative stress, calcium mishandling and inflammation. There are no specific drugs in treating DCM despite of decades of basic and clinical investigations. This is, in part, due to the lack of our understanding as to how heart failure initiates and develops, especially in diabetic patients without an underlying ischemic cause. Some of the traditional anti-diabetic or lipid-lowering agents aimed at shifting the balance of cardiac metabolism from utilizing fat to glucose have been shown inadequately targeting multiple aspects of the conditions. Peroxisome proliferator-activated receptor α (PPARα), a transcription factor, plays an important role in mediating DCM-related molecular events. Pharmacological targeting of PPARα activation has been demonstrated to be one of the important strategies for patients with diabetes, metabolic syndrome, and atherosclerotic cardiovascular diseases. The aim of this review is to provide a contemporary view of PPARα in association with the underlying pathophysiological changes in DCM. We discuss the PPARα-related drugs in clinical applications and facts related to the drugs that may be considered as risky (such as fenofibrate, bezafibrate, clofibrate) or safe (pemafibrate, metformin and glucagon-like peptide 1-receptor agonists) or having the potential (sodium–glucose co-transporter 2 inhibitor) in treating DCM.
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Affiliation(s)
- Lin Wang
- Department of Anesthesiology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Department of Anaesthesiology, The University of Hong Kong, Hong Kong, SAR, China
| | - Yin Cai
- Department of Anesthesiology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Department of Anaesthesiology, The University of Hong Kong, Hong Kong, SAR, China.,Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, SAR, China
| | - Liguo Jian
- Department of Cardiology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Chi Wai Cheung
- Department of Anaesthesiology, The University of Hong Kong, Hong Kong, SAR, China
| | - Liangqing Zhang
- Department of Anesthesiology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.
| | - Zhengyuan Xia
- Department of Anesthesiology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China. .,Department of Anaesthesiology, The University of Hong Kong, Hong Kong, SAR, China.
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Zhang L, Gui T, Console L, Scalise M, Indiveri C, Hausler S, Kullak-Ublick GA, Gai Z, Visentin M. Cholesterol stimulates the cellular uptake of L-carnitine by the carnitine/organic cation transporter novel 2 (OCTN2). J Biol Chem 2020; 296:100204. [PMID: 33334877 PMCID: PMC7948396 DOI: 10.1074/jbc.ra120.015175] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 12/14/2020] [Accepted: 12/17/2020] [Indexed: 12/19/2022] Open
Abstract
The carnitine/organic cation transporter novel 2 (OCTN2) is responsible for the cellular uptake of carnitine in most tissues. Being a transmembrane protein OCTN2 must interact with the surrounding lipid microenvironment to function. Among the main lipid species that constitute eukaryotic cells, cholesterol has highly dynamic levels under a number of physiopathological conditions. This work describes how plasma membrane cholesterol modulates OCTN2 transport of L-carnitine in human embryonic kidney 293 cells overexpressing OCTN2 (OCTN2-HEK293) and in proteoliposomes harboring human OCTN2. We manipulated the cholesterol content of intact cells, assessed by thin layer chromatography, through short exposures to empty and/or cholesterol-saturated methyl-β-cyclodextrin (mβcd), whereas free cholesterol was used to enrich reconstituted proteoliposomes. We measured OCTN2 transport using [3H]L-carnitine, and expression levels and localization by surface biotinylation and Western blotting. A 20-min preincubation with mβcd reduced the cellular cholesterol content and inhibited L-carnitine influx by 50% in comparison with controls. Analogously, the insertion of cholesterol in OCTN2-proteoliposomes stimulated L-carnitine uptake in a dose-dependent manner. Carnitine uptake in cells incubated with empty mβcd and cholesterol-saturated mβcd to preserve the cholesterol content was comparable with controls, suggesting that the mβcd effect on OCTN2 was cholesterol dependent. Cholesterol stimulated L-carnitine influx in cells by markedly increasing the affinity for L-carnitine and in proteoliposomes by significantly enhancing the affinity for Na+ and, in turn, the L-carnitine maximal transport capacity. Because of the antilipogenic and antioxidant features of L-carnitine, the stimulatory effect of cholesterol on L-carnitine uptake might represent a novel protective effect against lipid-induced toxicity and oxidative stress.
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Affiliation(s)
- Lu Zhang
- College of Traditional Chinese Medicine, Innovation Research Institute of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China; Department of Clinical Pharmacology and Toxicology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Ting Gui
- College of Traditional Chinese Medicine, Innovation Research Institute of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Lara Console
- Department DiBEST (Biologia, Ecologia, Scienze della Terra) Unit of Biochemistry and Molecular Biotechnology, University of Calabria, Arcavacata di Rende, Italy
| | - Mariafrancesca Scalise
- Department DiBEST (Biologia, Ecologia, Scienze della Terra) Unit of Biochemistry and Molecular Biotechnology, University of Calabria, Arcavacata di Rende, Italy
| | - Cesare Indiveri
- Department DiBEST (Biologia, Ecologia, Scienze della Terra) Unit of Biochemistry and Molecular Biotechnology, University of Calabria, Arcavacata di Rende, Italy
| | - Stephanie Hausler
- Department of Clinical Pharmacology and Toxicology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Gerd A Kullak-Ublick
- Department of Clinical Pharmacology and Toxicology, University Hospital Zurich, University of Zurich, Zurich, Switzerland; Mechanistic Safety, CMO & Patient Safety, Global Drug Development, Novartis Pharma, Basel, Switzerland
| | - Zhibo Gai
- College of Traditional Chinese Medicine, Innovation Research Institute of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China; Department of Clinical Pharmacology and Toxicology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
| | - Michele Visentin
- Department of Clinical Pharmacology and Toxicology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
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Organic Cation Transporters in Human Physiology, Pharmacology, and Toxicology. Int J Mol Sci 2020; 21:ijms21217890. [PMID: 33114309 PMCID: PMC7660683 DOI: 10.3390/ijms21217890] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 10/20/2020] [Accepted: 10/21/2020] [Indexed: 12/13/2022] Open
Abstract
Individual cells and epithelia control the chemical exchange with the surrounding environment by the fine-tuned expression, localization, and function of an array of transmembrane proteins that dictate the selective permeability of the lipid bilayer to small molecules, as actual gatekeepers to the interface with the extracellular space. Among the variety of channels, transporters, and pumps that localize to cell membrane, organic cation transporters (OCTs) are considered to be extremely relevant in the transport across the plasma membrane of the majority of the endogenous substances and drugs that are positively charged near or at physiological pH. In humans, the following six organic cation transporters have been characterized in regards to their respective substrates, all belonging to the solute carrier 22 (SLC22) family: the organic cation transporters 1, 2, and 3 (OCT1–3); the organic cation/carnitine transporter novel 1 and 2 (OCTN1 and N2); and the organic cation transporter 6 (OCT6). OCTs are highly expressed on the plasma membrane of polarized epithelia, thus, playing a key role in intestinal absorption and renal reabsorption of nutrients (e.g., choline and carnitine), in the elimination of waste products (e.g., trimethylamine and trimethylamine N-oxide), and in the kinetic profile and therapeutic index of several drugs (e.g., metformin and platinum derivatives). As part of the Special Issue Physiology, Biochemistry, and Pharmacology of Transporters for Organic Cations, this article critically presents the physio-pathological, pharmacological, and toxicological roles of OCTs in the tissues in which they are primarily expressed.
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Lin X, Lyvers Peffer PA, Woodworth J, Odle J. Ontogeny of carnitine biosynthesis in Sus scrofa domesticus, inferred from γ-butyrobetaine hydroxylase (dioxygenase) activity and substrate inhibition. Am J Physiol Regul Integr Comp Physiol 2020; 319:R43-R49. [PMID: 32432915 DOI: 10.1152/ajpregu.00051.2020] [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: 01/10/2023]
Abstract
γ-Butyrobetaine hydroxylase (γ-BBH) is the last limiting enzyme of the l-carnitine biosynthesis pathway and plays an important role in catalyzing the hydroxylation of γ-butyrobetaine (γ-BB) to l-carnitine. To study the developmental effect of substrate concentration on the enzyme's specific activity, kinetics of γ-BBH were measured in liver and kidney from newborn and 1-, 7-, 21-, 35-, 56-, and 210-day-old domestic pigs. Fresh tissue homogenates were assayed under nine concentrations of γ-BB from 0 to 1.5 mM. Substrate inhibition associated with age was observed at ≥0.6 mM of γ-BB. Hepatic activity was low at birth but increased after 1 day. By 21 days, the activity rose by 6.6-fold (P < 0.05) and remained constant after 56 days. Renal activity was higher than in liver at birth but remained constant through 35 days. By 56 days, the velocity increased by 44% over the activity at birth (P < 0.05). The apparent Km for γ-BB at birth on average was 2.8-fold higher than at 1 day. The Km value was 60% higher in kidney than liver during development but showed no difference in adult pigs. The total organ enzyme activity increased by 130-fold for liver and 18-fold for kidney as organ weight increased from birth to 56 days. In conclusion, age and substrate affect γ-BBH specific activity and Km for γ-BB in liver and kidney. Whereas the predominant organ for carnitine synthesis is likely the kidney at birth, the liver appears to predominate after the pig exceeds 7 days of age.
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Affiliation(s)
- Xi Lin
- Laboratory of Developmental Nutrition, Department of Animal Sciences, North Carolina State University, Raleigh, North Carolina
| | - Pasha A Lyvers Peffer
- Laboratory of Developmental Nutrition, Department of Animal Sciences, North Carolina State University, Raleigh, North Carolina
| | | | - Jack Odle
- Laboratory of Developmental Nutrition, Department of Animal Sciences, North Carolina State University, Raleigh, North Carolina
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Effects of Exercise Training on Renal Carnitine Biosynthesis and Uptake in the High-Fat and High-Sugar-Fed Mouse. Molecules 2020; 25:molecules25092100. [PMID: 32365864 PMCID: PMC7248909 DOI: 10.3390/molecules25092100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 04/16/2020] [Accepted: 04/28/2020] [Indexed: 02/08/2023] Open
Abstract
(1) Background: Diet-induced obesity inhibits hepatic carnitine biosynthesis. Herein, the effects of high-fat (HF) and high-sugar (HFHS) feeding and exercise training (ET) on renal carnitine biosynthesis and uptake were determined. (2) Methods: Male C57BL/6J mice were assigned to the following groups: lean control (standard chow), HFHS diet, and HFHS diet with ET. ET consisted of 150 min of treadmill running per week for 12 weeks. Protein levels of γ-butyrobetaine hydroxylase (γ-BBH) and organic cation transporter-2 (OCTN2) were measured as markers of biosynthesis and uptake, respectively. (3) Results: HFHS feeding induced an obese diabetic state with accompanying hypocarnitinemia, reflected by decreased free carnitine levels in plasma and kidney. This hypocarnitinemia was associated with decreased γ-BBH (~30%) and increased OCTN2 levels (~50%). ET failed to improve the obesity and hyperglycemia, but improved insulin levels and prevented the hypocarnitinemia. ET increased protein levels of γ-BBH, whereas levels of OCTN2 were decreased. Peroxisome proliferator-activated receptor-alpha content was not changed by the HFHS diet or ET. (4) Conclusions: Our results indicate that ET prevents the hypocarnitinemia induced by HFHS feeding by increasing carnitine biosynthesis in kidney. Increased expression of OCTN2 with HFHS feeding suggests that renal uptake was stimulated to prevent carnitine loss.
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16
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Lysne V, Bjørndal B, Grinna ML, Midttun Ø, Ueland PM, Berge RK, Dierkes J, Nygård O, Strand E. Short-term treatment with a peroxisome proliferator-activated receptor α agonist influences plasma one-carbon metabolites and B-vitamin status in rats. PLoS One 2019; 14:e0226069. [PMID: 31805132 PMCID: PMC6894826 DOI: 10.1371/journal.pone.0226069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 11/18/2019] [Indexed: 12/21/2022] Open
Abstract
INTRODUCTION Peroxisome proliferator-activated receptors (PPARs) have been suggested to be involved in the regulation of one-carbon metabolism. Previously we have reported effects on plasma concentrations of metabolites along these pathways as well as markers of B-vitamin status in rats following treatment with a pan-PPAR agonist. Here we aimed to investigate the effect on these metabolites after specific activation of the PPARα and PPARγ subtypes. METHODS For a period of 12 days, Male Wistar rats (n = 20) were randomly allocated to receive treatment with the PPARα agonist WY-14.643 (n = 6), the PPARγ agonist rosiglitazone (n = 6) or placebo (n = 8). The animals were sacrificed under fasting conditions, and plasma concentration of metabolites were determined. Group differences were assessed by one-way ANOVA, and planned comparisons were performed for both active treatment groups towards the control group. RESULTS Treatment with a PPARα agonist was associated with increased plasma concentrations of most biomarkers, with the most pronounced differences observed for betaine, dimethylglycine, glycine, nicotinamide, methylnicotinamide, pyridoxal and methylmalonic acid. Lower levels were observed for flavin mononucleotide. Fewer associations were observed after treatment with a PPARγ agonist, and the most notable was increased plasma serine. CONCLUSION Treatment with a PPARα agonist influenced plasma concentration of one-carbon metabolites and markers of B-vitamin status. This confirms previous findings, suggesting specific involvement of PPARα in the regulation of these metabolic pathways as well as the status of closely related B-vitamins.
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Affiliation(s)
- Vegard Lysne
- Centre for Nutrition, Department of Clinical Science, University of Bergen, Bergen, Norway
- * E-mail:
| | - Bodil Bjørndal
- Department of Clinical Science, University of Bergen, Bergen, Norway
| | | | | | - Per Magne Ueland
- Department of Clinical Science, University of Bergen, Bergen, Norway
- Bevital A/S, Bergen, Norway
| | - Rolf Kristian Berge
- Department of Clinical Science, University of Bergen, Bergen, Norway
- Department of Heart Disease, Haukeland University Hospital, Bergen, Norway
| | - Jutta Dierkes
- Centre for Nutrition, Department of Clinical Medicine, University of Bergen, Bergen, Norway
- Mohn Nutrition Research Laboratory, Centre for Nutrition, University of Bergen, Bergen, Norway
- Laboratory Medicine and Pathology, Haukeland University Hospital, Bergen, Norway
| | - Ottar Nygård
- Centre for Nutrition, Department of Clinical Science, University of Bergen, Bergen, Norway
- Department of Heart Disease, Haukeland University Hospital, Bergen, Norway
- Mohn Nutrition Research Laboratory, Centre for Nutrition, University of Bergen, Bergen, Norway
| | - Elin Strand
- Department of Clinical Science, University of Bergen, Bergen, Norway
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Luo T, Wang C, Pan Z, Jin C, Fu Z, Jin Y. Maternal Polystyrene Microplastic Exposure during Gestation and Lactation Altered Metabolic Homeostasis in the Dams and Their F1 and F2 Offspring. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:10978-10992. [PMID: 31448906 DOI: 10.1021/acs.est.9b03191] [Citation(s) in RCA: 150] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Microplastics (MPs) are considered as a pollutant of marine environments and have become a global environmental problem in recent years. A number of studies have demonstrated that MPs can enter the human food chain, and MPs have even been detected in human stools. Therefore, there is increasing concern about the potential risks of MPs to human and animal health. Here, we investigated maternal polystyrene MPs exposure during gestation and lactation and evaluated the potential effects on dams and the F1 (both PND 42 and 280) and F2 (PND 42) generations. The results of transcriptome and 16S rRNA sequencing indicated that MPs caused the metabolic disorder in maternal MPs associated with gut microbiota dysbiosis and gut barrier dysfunction. Simultaneously, maternal MPs exposure also had the intergenerational effects and even caused long-term metabolic consequences in the F1 and F2 generations. In addition, in F1 (PND 42), the composition of gut microbiota did not change significantly, while the hepatic transcriptome and serum metabolite changes showed the potential risk in metabolic disorder. Then, the potential of hepatic lipid accumulation was observed in adult F1 mice (PND 280), especially in the female mice. Our results demonstrated that maternal MPs exposure during gestation and lactation increases the risk of metabolic disorder, and these results provide new insight into the potential long-term hazards of MPs.
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Affiliation(s)
- Ting Luo
- College of Biotechnology and Bioengineering , Zhejiang University of Technology , Hangzhou 310032 , China
| | - Caiyun Wang
- College of Biotechnology and Bioengineering , Zhejiang University of Technology , Hangzhou 310032 , China
| | - Zihong Pan
- College of Biotechnology and Bioengineering , Zhejiang University of Technology , Hangzhou 310032 , China
| | - Cuiyuan Jin
- College of Biotechnology and Bioengineering , Zhejiang University of Technology , Hangzhou 310032 , China
| | - Zhengwei Fu
- College of Biotechnology and Bioengineering , Zhejiang University of Technology , Hangzhou 310032 , China
| | - Yuanxiang Jin
- College of Biotechnology and Bioengineering , Zhejiang University of Technology , Hangzhou 310032 , China
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18
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Ma Y, Zhou W, Chen P, Urriola PE, Shurson GC, Ruan R, Chen C. Metabolomic Evaluation of Scenedesmus sp. as a Feed Ingredient Revealed Dose-Dependent Effects on Redox Balance, Intermediary and Microbial Metabolism in a Mouse Model. Nutrients 2019; 11:E1971. [PMID: 31438641 PMCID: PMC6770930 DOI: 10.3390/nu11091971] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 08/10/2019] [Accepted: 08/17/2019] [Indexed: 12/15/2022] Open
Abstract
Scenedesmus is a common green algae genus with high biomass productivity, and has been widely used in biofuel production and waste water management. However, the suitability and metabolic consequences of using Scenedesmus as an animal feed ingredient have not been examined in detail. In this study, the influences of consuming Scenedesmus on the metabolic status of young mice were investigated through growth performance, blood chemistry, and liquid chromatography-mass spectrometry (LC-MS)-based metabolomics. Compared to the control diet, feeding a diet containing 5% Scenedesmus improved growth performance while the diet containing 20% Scenedesmus suppressed it. Among common macronutrients-derived blood biochemicals, serum triacylglycerols and cholesterol levels were dramatically decreased by feeding the 20% Scenedesmus diet. Metabolomic analysis of liver, serum, feces, and urine samples indicated that Scenedesmus feeding greatly affected the metabolites associated with amino acid, lipid, purine, microbial metabolism, and the endogenous antioxidant system. The growth promotion effect of feeding the 5% Scenedesmus diet was associated with elevated concentrations of antioxidants, an expanded purine nucleotide cycle, and modified microbial metabolism, while the growth suppression effect of feeding the 20% Scenedesmus diet was correlated to oxidative stress, disrupted urea cycle, upregulated fatty acid oxidation, and an imbalanced lipidome. These correlations among Scenedesmus dietary inclusion rate, individual metabolite markers, and growth performance suggest the need to define the dietary inclusion rate threshold for using Scenedesmus and other microalgae supplements as feed ingredients, and also warrant further mechanistic investigations on the biological processes connecting specific constituents of Scenedesmus with the metabolic effects observed in this study.
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Affiliation(s)
- Yiwei Ma
- Department of Food Science and Nutrition, University of Minnesota, St. Paul, MN 55108, USA
| | - Wenguang Zhou
- Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN 55108, USA
| | - Paul Chen
- Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN 55108, USA
| | - Pedro E Urriola
- Department of Animal Science, University of Minnesota, St. Paul, MN 55108, USA
| | - Gerald C Shurson
- Department of Animal Science, University of Minnesota, St. Paul, MN 55108, USA
| | - Roger Ruan
- Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN 55108, USA.
| | - Chi Chen
- Department of Food Science and Nutrition, University of Minnesota, St. Paul, MN 55108, USA.
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Xue Y, Ma C, Hanna I, Pan G. Intestinal Transporter-Associated Drug Absorption and Toxicity. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1141:361-405. [DOI: 10.1007/978-981-13-7647-4_8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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20
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Ringseis R, Keller J, Eder K. Basic mechanisms of the regulation of L-carnitine status in monogastrics and efficacy of L-carnitine as a feed additive in pigs and poultry. J Anim Physiol Anim Nutr (Berl) 2018; 102:1686-1719. [PMID: 29992642 DOI: 10.1111/jpn.12959] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 06/20/2018] [Accepted: 06/22/2018] [Indexed: 12/19/2022]
Abstract
A great number of studies have investigated the potential of L-carnitine as feed additive to improve performance of different monogastric and ruminant livestock species, with, however, discrepant outcomes. In order to understand the reasons for these discrepant outcomes, it is important to consider the determinants of L-carnitine status and how L-carnitine status is regulated in the animal's body. While it is a long-known fact that L-carnitine is endogenously biosynthesized in certain tissues, it was only recently recognized that critical determinants of L-carnitine status, such as intestinal L-carnitine absorption, tissue L-carnitine uptake, endogenous L-carnitine synthesis and renal L-carnitine reabsorption, are regulated by specific nutrient sensing nuclear receptors. This review aims to give a more in-depth understanding of the basic mechanisms of the regulation of L-carnitine status in monogastrics taking into account the most recent evidence on nutrient sensing nuclear receptors and evaluates the efficacy of L-carnitine as feed additive in monogastric livestock by providing an up-to-date overview about studies with L-carnitine supplementation in pigs and poultry.
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Affiliation(s)
- Robert Ringseis
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University Gießen, Gießen, Germany
| | - Janine Keller
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University Gießen, Gießen, Germany
| | - Klaus Eder
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University Gießen, Gießen, Germany
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Miyazaki T, Honda A, Ikegami T, Iida T, Matsuzaki Y. Human-specific dual regulations of FXR-activation for reduction of fatty liver using in vitro cell culture model. J Clin Biochem Nutr 2018; 64:112-123. [PMID: 30936623 PMCID: PMC6436045 DOI: 10.3164/jcbn.18-80] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 09/19/2018] [Indexed: 12/12/2022] Open
Abstract
Nuclear receptor farnesoid X receptor activation inhibits fatty acid synthesis through the liver X receptor-α-sterol regulatory element binding protein-1c pathway universally in animals, but also has human-specific crosstalk with the peroxisome proliferator-activated receptor-α. The effects of farnesoid X receptor-ligands on both the synthesis and degradation of fatty liver through nuclear receptor-related regulation were investigated in both human and murine hepatocytes. A fatty liver culture cell model was established using a synthetic liver X receptor-α-ligand (To901317) for both human and mouse non-neoplastic hepatocytes. The hepatocytes were exposed to natural or synthetic farnesoid X receptor-ligands (bile acids, GW4064, obeticholic acid) together with or after To901317. Cellular triglyceride accumulation was significantly inhibited by the farnesoid X receptor-ligands along with inhibition of lipogenic genes and up-regulation of farnesoid X receptor-target small heterodimer partner in both human and mouse cells. The accumulated triglyceride was significantly degraded by the farnesoid X receptor-ligands only in the human cells accompanied with the up-regulations of peroxisome proliferator-activated receptor-α and fatty acid β-oxidation. Farnesoid X receptor-ligands can be therapeutic agents for treating human fatty liver through dual effects on inhibition of lipogenesis and on enhancement of lipolysis.
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Affiliation(s)
- Teruo Miyazaki
- Joint Research Center, Tokyo Medical University Ibaraki Medical Center, 3-20-1 Chuo, Ami, Inashiki, Ibaraki 300-0395, Japan
| | - Akira Honda
- Joint Research Center, Tokyo Medical University Ibaraki Medical Center, 3-20-1 Chuo, Ami, Inashiki, Ibaraki 300-0395, Japan.,Department of Internal Medicine, Division of Gastroenterology and Hepatology, Tokyo Medical University Ibaraki Medical Center, 3-20-1 Chuo, Ami, Inashiki, Ibaraki 300-0395, Japan
| | - Tadashi Ikegami
- Department of Internal Medicine, Division of Gastroenterology and Hepatology, Tokyo Medical University Ibaraki Medical Center, 3-20-1 Chuo, Ami, Inashiki, Ibaraki 300-0395, Japan
| | - Takashi Iida
- Department of Chemistry, College of Humanities and Sciences, Nihon University, 3-25-40 Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan
| | - Yasushi Matsuzaki
- Department of Internal Medicine, Division of Gastroenterology and Hepatology, Tokyo Medical University Ibaraki Medical Center, 3-20-1 Chuo, Ami, Inashiki, Ibaraki 300-0395, Japan
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Metabolic Alterations Associated with Atorvastatin/Fenofibric Acid Combination in Patients with Atherogenic Dyslipidaemia: A Randomized Trial for Comparison with Escalated-Dose Atorvastatin. Sci Rep 2018; 8:14642. [PMID: 30279504 PMCID: PMC6168550 DOI: 10.1038/s41598-018-33058-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 09/18/2018] [Indexed: 01/03/2023] Open
Abstract
In the current study, the metabolic effects of atorvastatin dose escalation versus atorvastatin/fenofibric acid combination were compared using metabolomics analyses. Men and women with combined hyperlipidaemia were initially prescribed atorvastatin (10 mg, ≥4 weeks). Patients who reached low-density lipoprotein-cholesterol targets, but had triglyceride and high-density lipoprotein-cholesterol levels ≥150 mg/dL and <50 mg/dL, respectively, were randomized to receive atorvastatin 20 mg or atorvastatin 10 mg/fenofibric acid 135 mg for 12 weeks. Metabolite profiling of serum was performed and changes in metabolites after drug treatment in the two groups were compared. Analysis was performed using patients' samples obtained before and after treatment. Of 89 screened patients, 37 who met the inclusion criteria were randomized, and 34 completed the study. Unlike that in the dose-escalation group, distinct clustering of both lipid and aqueous metabolites was observed in the combination group after treatment. Most lipid metabolites of acylglycerols and many of ceramides decreased, while many of sphingomyelins increased in the combination group. Atorvastatin dose escalation modestly decreased lysophosphatidylcholines; however, the effect of combination therapy was variable. Most aqueous metabolites decreased, while L-carnitine remarkably increased in the combination group. In conclusion, the atorvastatin/fenofibric acid combination induced distinct metabolite clustering. Our results provide comprehensive information regarding metabolic changes beyond conventional lipid profiles for this combination therapy.
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Ringseis R, Keller J, Eder K. Regulation of carnitine status in ruminants and efficacy of carnitine supplementation on performance and health aspects of ruminant livestock: a review. Arch Anim Nutr 2018; 72:1-30. [PMID: 29313385 DOI: 10.1080/1745039x.2017.1421340] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Carnitine has long been known to play a critical role for energy metabolism. Due to this, a large number of studies have been carried out to investigate the potential of supplemental carnitine in improving performance of livestock animals including ruminants, with however largely inconsistent results. An important issue that has to be considered when using carnitine as a feed additive is that the efficacy of supplemental carnitine is probably dependent on the animal's carnitine status, which is affected by endogenous carnitine synthesis, carnitine uptake from the gastrointestinal tract and carnitine excretion. The present review aims to summarise the current knowledge of the regulation of carnitine status and carnitine homeostasis in ruminants, and comprehensively evaluate the efficacy of carnitine supplementation on performance and/or health in ruminant livestock by comparing the outcomes of studies with carnitine supplementation in dairy cattle, growing and finishing cattle and sheep. While most of the studies show that supplemental carnitine, even in ruminally unprotected form, is bioavailable in ruminants, its effect on either milk or growth performance is largely disappointing. However, supplemental carnitine appears to be a useful strategy to offer protection against ammonia toxicity caused by consumption of high levels of non-protein N or forages with high levels of soluble N both, in cattle and sheep.
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Affiliation(s)
- Robert Ringseis
- a Institute of Animal Nutrition and Nutrition Physiology , Justus-Liebig-University Gießen , Gießen , Germany
| | - Janine Keller
- a Institute of Animal Nutrition and Nutrition Physiology , Justus-Liebig-University Gießen , Gießen , Germany
| | - Klaus Eder
- a Institute of Animal Nutrition and Nutrition Physiology , Justus-Liebig-University Gießen , Gießen , Germany
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Broderick TL, Cusimano FA, Carlson C, Babu JR. Biosynthesis of the Essential Fatty Acid Oxidation Cofactor Carnitine Is Stimulated in Heart and Liver after a Single Bout of Exercise in Mice. J Nutr Metab 2018; 2018:2785090. [PMID: 30002928 PMCID: PMC5996426 DOI: 10.1155/2018/2785090] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 03/13/2018] [Accepted: 04/04/2018] [Indexed: 11/19/2022] Open
Abstract
We determined whether one single bout of exercise stimulates carnitine biosynthesis and carnitine uptake in liver and heart. Free carnitine (FC) in plasma was assayed using acetyltransferase and [14C]acetyl-CoA in Swiss Webster mice after 1 hour of moderate-intensity treadmill running or 4 hours and 8 hours into recovery. Liver and heart were removed under the same conditions for measurement of carnitine biosynthesis enzymes (liver butyrobetaine hydroxylase, γ-BBH; heart trimethyllysine dioxygenase, TMLD), organic cation transporter-2 (OCTN2, carnitine transporter), and liver peroxisome proliferator-activated receptor-alpha (PPARα, transcription factor for γ-BBH and OCTN2 synthesis). In exercised mice, FC levels in plasma decreased while heart and liver OCTN2 protein expressed increased, reflecting active uptake of FC. During recovery, the rise in FC to control levels was associated with increased liver γ-BBH expression. Protein expression of PPARα was stimulated in liver after exercise and during recovery. Interestingly, heart TMLD protein was also detected after exercise. Acute exercise stimulates carnitine uptake in liver and heart. The rapid return of FC levels in plasma after exercise indicates carnitine biosynthesis by liver is stimulated to establish carnitine homeostasis. Our results suggest that exercise may benefit patients with carnitine deficiency syndromes.
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Affiliation(s)
- Tom L. Broderick
- Department of Physiology and Laboratory of Diabetes and Exercise Metabolism, Midwestern University, Glendale, AZ, USA
| | - Frank A. Cusimano
- Department of Physiology and Laboratory of Diabetes and Exercise Metabolism, Midwestern University, Glendale, AZ, USA
| | - Chelsea Carlson
- Department of Physiology and Laboratory of Diabetes and Exercise Metabolism, Midwestern University, Glendale, AZ, USA
| | - Jeganathan Ramesh Babu
- Department of Nutrition, Dietetics, and Hospitality Management, Auburn University, Auburn, AL, USA
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25
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Bjørndal B, Alterås EK, Lindquist C, Svardal A, Skorve J, Berge RK. Associations between fatty acid oxidation, hepatic mitochondrial function, and plasma acylcarnitine levels in mice. Nutr Metab (Lond) 2018; 15:10. [PMID: 29422939 PMCID: PMC5789604 DOI: 10.1186/s12986-018-0241-7] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 01/10/2018] [Indexed: 02/07/2023] Open
Abstract
Background The 4-thia fatty acid tetradecylthiopropionic acid (TTP) is known to inhibit mitochondrial β-oxidation, and can be used as chemically induced hepatic steatosis-model in rodents, while 3-thia fatty acid tetradecylthioacetic acid (TTA) stimulates fatty acid oxidation through activation of peroxisome proliferator activated receptor alpha (PPARα). We wished to determine how these two compounds affected in vivo respiration and mitochondrial efficiency, with an additional goal to elucidate whether mitochondrial function is reflected in plasma acylcarnitine levels. Methods C57BL/6 mice were divided in 4 groups of 10 mice and fed a control low-fat diet, low-fat diets with 0.4% (w/w) TTP, 0.4% TTA or a combination of these two fatty acids for three weeks (n = 10). At sacrifice, β-oxidation and oxidative phosphorylation (OXPHOS) capacity was analysed in fresh liver samples. Hepatic mitochondria were studied using transmission electron microscopy. Lipid classes were measured in plasma, heart and liver, acylcarnitines were measured in plasma, and gene expression was measured in liver. Results The TTP diet resulted in hepatic lipid accumulation, plasma L-carnitine and acetylcarnitine depletion and elevated palmitoylcarnitine and non-esterified fatty acid levels. No significant lipid accumulation was observed in heart. The TTA supplement resulted in enhanced hepatic β-oxidation, accompanied by an increased level of acetylcarnitine and palmitoylcarnitine in plasma. Analysis of mitochondrial respiration showed that TTP reduced oxidative phosphorylation, while TTA increased the maximum respiratory capacity of the electron transport system. Combined treatment with TTP and TTA resulted in a profound stimulation of genes involved in the PPAR-response and L-carnitine metabolism, and partly prevented triacylglycerol accumulation in the liver concomitant with increased peroxisomal β-oxidation and depletion of plasma acetylcarnitines. Despite an increased number of mitochondria in the liver of TTA + TTP fed mice, the OXPHOS capacity was significantly reduced. Conclusion This study indicates that fatty acid β-oxidation directly affects mitochondrial respiratory capacity in liver. As plasma acylcarnitines reflected the reduced mitochondrial β-oxidation in TTP-fed mice, they could be useful tools to monitor mitochondrial function. As mitochondrial dysfunction is a major determinant of metabolic disease, this supports their use as plasma markers of cardiovascular risk in humans. Results however indicate that high PPAR activation obscures the interpretation of plasma acylcarnitine levels. Electronic supplementary material The online version of this article (10.1186/s12986-018-0241-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Bodil Bjørndal
- 1Department of Clinical Science, University of Bergen, N-5020 Bergen, Norway
| | - Eva Katrine Alterås
- 1Department of Clinical Science, University of Bergen, N-5020 Bergen, Norway
| | - Carine Lindquist
- 1Department of Clinical Science, University of Bergen, N-5020 Bergen, Norway.,2Department of Heart Disease, Haukeland University Hospital, N-5021 Bergen, Norway
| | - Asbjørn Svardal
- 1Department of Clinical Science, University of Bergen, N-5020 Bergen, Norway
| | - Jon Skorve
- 1Department of Clinical Science, University of Bergen, N-5020 Bergen, Norway
| | - Rolf K Berge
- 1Department of Clinical Science, University of Bergen, N-5020 Bergen, Norway.,2Department of Heart Disease, Haukeland University Hospital, N-5021 Bergen, Norway
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26
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Quifer-Rada P, Chiva-Blanch G, Jáuregui O, Estruch R, Lamuela-Raventós RM. A discovery-driven approach to elucidate urinary metabolome changes after a regular and moderate consumption of beer and nonalcoholic beer in subjects at high cardiovascular risk. Mol Nutr Food Res 2017; 61. [PMID: 28608394 DOI: 10.1002/mnfr.201600980] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 05/24/2017] [Accepted: 05/30/2017] [Indexed: 01/15/2023]
Abstract
SCOPE The aim of this work was to study the urinary metabolomics changes of participants that consumed beer, nonalcoholic beer (na-beer), and gin. METHODS AND RESULTS Thirty-three males at high cardiovascular risk between 55 and 75 years old participated in an open, randomized, crossover, controlled trial with three nutritional interventions consisting of beer, na-beer, and gin for 4 wk. Diet and physical activity was monitored throughout the study and compliance was assessed by measurement of urinary isoxanthohumol. Metabolomic analysis was performed in urine samples by LC coupled to an LTQ-Orbitrap mass spectrometer combined with univariate and multivariate statistical analysis. Ten metabolites were identified. Eight were exogenous metabolites related to beer, na-beer, or gin consumption, but two of them were related to endogenic changes: hydroxyadipic acid linked to fatty acid oxidation, and 4-guanidinobutanoic acid, which correlated with a decrease in urinary creatinine. Plasmatic acylcarnitines were quantified by targeted MS. A regular and moderate consumption of beer and na-beer decreased stearoylcarnitine concentrations. CONCLUSION Humulinone and 2,3-dihydroxy-3-methylvaleric acid showed to be potential biomarkers of beer and na-beer consumption. Moreover, the results of this trial provide new evidence that the nonalcoholic fraction of beer may increase fatty oxidation.
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Affiliation(s)
- Paola Quifer-Rada
- Department of Nutrition, Food Science and Gastronomy-XARTA-INSA-UB, School of Pharmacy and Food Science, University of Barcelona, Barcelona, Spain.,CIBEROBN del Instituto de Salud Carlos III, ISCIII, Madrid, Spain
| | - Gemma Chiva-Blanch
- Department of Internal Medicine, Hospital Clinic, Institute of Biomedical Investigation August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain.,Cardiovascular Research Center (CSIC-ICCC), Barcelona, Spain.,Biomedical Research Institute Sant Pau (IIB-Sant Pau), Barcelona, Spain
| | - Olga Jáuregui
- Scientific and Technological Center of University of Barcelona (CCiTUB), Barcelona, Spain
| | - Ramon Estruch
- Department of Internal Medicine, Hospital Clinic, Institute of Biomedical Investigation August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Rosa M Lamuela-Raventós
- Department of Nutrition, Food Science and Gastronomy-XARTA-INSA-UB, School of Pharmacy and Food Science, University of Barcelona, Barcelona, Spain.,CIBEROBN del Instituto de Salud Carlos III, ISCIII, Madrid, Spain
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Broderick T, Cusimano F, Carlson C, Tamura L. Acute Exercise Stimulates Carnitine Biosynthesis and OCTN2 Expression in Mouse Kidney. Kidney Blood Press Res 2017; 42:398-405. [DOI: 10.1159/000478737] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 04/19/2017] [Indexed: 11/19/2022] Open
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Pamungkas AD, Medriano CA, Sim E, Lee S, Park YH. A pilot study identifying a potential plasma biomarker for determining EGFR mutations in exons 19 or 21 in lung cancer patients. Mol Med Rep 2017; 15:4155-4161. [PMID: 28487968 PMCID: PMC5436150 DOI: 10.3892/mmr.2017.6530] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 03/13/2017] [Indexed: 12/29/2022] Open
Abstract
The most common type of lung cancer is non-small cell lung cancer (NSCLC), which is frequently characterized by a mutation in the epidermal growth factor receptor (EGFR). Determining the presence of an EGFR mutation in lung cancer is important, as it determines the type of treatment that a patients will receive. Therefore, the aim of the present study was to apply high-resolution metabolomics (HRM) using liquid chromatography-mass spectrometry to identify significant compounds in human plasma samples obtained from South Korean NSCLC patients, as potential biomarkers for providing early detection and diagnosis of minimally-invasive NSCLC. The metabolic differences between lung cancer patients without EGFR mutations were compared with patients harboring EGFR mutations. Univariate analysis was performed, with a false discovery rate of q=0.05, in order to identify significant metabolites between the two groups. In addition, hierarchical clustering analysis was performed to discriminate between the metabolic profiles of the two groups. Furthermore, the significant metabolites were identified and mapped using Mummichog software, in order to generate a potential metabolic network model. Using metabolome-wide association studies, metabolic alterations were identified. Linoleic acid [303.23 m/z, (M+Na)+], 5-methyl tetrahydrofolate [231.10 m/z, (M+2H)+] and N-succinyl-L-glutamate-5 semialdehyde [254.06 m/z, (M+Na)+], were observed to be elevated in patients harboring EGFR mutations, whereas tetradecanoyl carnitine [394.29 m/z, (M+Na)+] was observed to be reduced. This suggests that these compounds may be affected by the EGFR mutation. In conclusion, the present study identified four potential biomarkers in patients with EGFR mutations, using HRM combined with pathway analysis. These results may facilitate the development of novel diagnostic tools for EGFR mutation detection in patients with lung cancer.
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Affiliation(s)
- Aryo D Pamungkas
- College of Pharmacy, Korea University, Jochiwon‑eup, Sejong 30029, Republic of Korea
| | - Carl A Medriano
- College of Pharmacy, Korea University, Jochiwon‑eup, Sejong 30029, Republic of Korea
| | - Eunjung Sim
- Department of Pulmonology, Korea University Guro Hospital, Guro‑gu, Seoul 08308, Republic of Korea
| | - Sungyong Lee
- Department of Pulmonology, Korea University Guro Hospital, Guro‑gu, Seoul 08308, Republic of Korea
| | - Youngja H Park
- College of Pharmacy, Korea University, Jochiwon‑eup, Sejong 30029, Republic of Korea
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29
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van Zutphen T, Ciapaite J, Bloks VW, Ackereley C, Gerding A, Jurdzinski A, de Moraes RA, Zhang L, Wolters JC, Bischoff R, Wanders RJ, Houten SM, Bronte-Tinkew D, Shatseva T, Lewis GF, Groen AK, Reijngoud DJ, Bakker BM, Jonker JW, Kim PK, Bandsma RHJ. Malnutrition-associated liver steatosis and ATP depletion is caused by peroxisomal and mitochondrial dysfunction. J Hepatol 2016; 65:1198-1208. [PMID: 27312946 DOI: 10.1016/j.jhep.2016.05.046] [Citation(s) in RCA: 116] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 04/15/2016] [Accepted: 05/30/2016] [Indexed: 12/04/2022]
Abstract
BACKGROUND & AIMS Severe malnutrition in young children is associated with signs of hepatic dysfunction such as steatosis and hypoalbuminemia, but its etiology is unknown. Peroxisomes and mitochondria play key roles in various hepatic metabolic functions including lipid metabolism and energy production. To investigate the involvement of these organelles in the mechanisms underlying malnutrition-induced hepatic dysfunction we developed a rat model of malnutrition. METHODS Weanling rats were placed on a low protein or control diet (5% or 20% of calories from protein, respectively) for four weeks. Peroxisomal and mitochondrial structural features were characterized using immunofluorescence and electron microscopy. Mitochondrial function was assessed using high-resolution respirometry. A novel targeted quantitative proteomics method was applied to analyze 47 mitochondrial proteins involved in oxidative phosphorylation, tricarboxylic acid cycle and fatty acid β-oxidation pathways. RESULTS Low protein diet-fed rats developed hypoalbuminemia and hepatic steatosis, consistent with the human phenotype. Hepatic peroxisome content was decreased and metabolomic analysis indicated peroxisomal dysfunction. This was followed by changes in mitochondrial ultrastructure and increased mitochondrial content. Mitochondrial function was impaired due to multiple defects affecting respiratory chain complex I and IV, pyruvate uptake and several β-oxidation enzymes, leading to strongly reduced hepatic ATP levels. Fenofibrate supplementation restored hepatic peroxisome abundance and increased mitochondrial β-oxidation capacity, resulting in reduced steatosis and normalization of ATP and plasma albumin levels. CONCLUSIONS Malnutrition leads to severe impairments in hepatic peroxisomal and mitochondrial function, and hepatic metabolic dysfunction. We discuss the potential future implications of our findings for the clinical management of malnourished children. LAY SUMMARY Severe malnutrition in children is associated with metabolic disturbances that are poorly understood. In order to study this further, we developed a malnutrition animal model and found that severe malnutrition leads to an impaired function of liver mitochondria which are essential for energy production and a loss of peroxisomes, which are important for normal liver metabolic function.
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Affiliation(s)
- Tim van Zutphen
- Department of Pediatrics, Center for Liver, Digestive and Metabolic Diseases, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Jolita Ciapaite
- Department of Pediatrics, Center for Liver, Digestive and Metabolic Diseases, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands; Systems Biology Centre for Energy Metabolism and Ageing, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands
| | - Vincent W Bloks
- Department of Pediatrics, Center for Liver, Digestive and Metabolic Diseases, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Cameron Ackereley
- Department of Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, Canada
| | - Albert Gerding
- Department of Pediatrics, Center for Liver, Digestive and Metabolic Diseases, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Angelika Jurdzinski
- Department of Pediatrics, Center for Liver, Digestive and Metabolic Diseases, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Roberta Allgayer de Moraes
- Department of Pediatrics, Center for Liver, Digestive and Metabolic Diseases, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Ling Zhang
- Physiology and Experimental Medicine Program, Research Institute, The Hospital for Sick Children, Toronto, Canada
| | - Justina C Wolters
- Systems Biology Centre for Energy Metabolism and Ageing, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands; Department of Pharmacy, Analytical Biochemistry, University of Groningen, Groningen, The Netherlands
| | - Rainer Bischoff
- Systems Biology Centre for Energy Metabolism and Ageing, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands; Department of Pharmacy, Analytical Biochemistry, University of Groningen, Groningen, The Netherlands
| | - Ronald J Wanders
- Laboratory Genetic Metabolic Diseases, Departments of Pediatrics and Clinical Chemistry, Academic Medical Center, Amsterdam, The Netherlands (current address: Icahn Institute for Genomics and Multiscale Biology, New York, USA)
| | - Sander M Houten
- Laboratory Genetic Metabolic Diseases, Departments of Pediatrics and Clinical Chemistry, Academic Medical Center, Amsterdam, The Netherlands (current address: Icahn Institute for Genomics and Multiscale Biology, New York, USA)
| | | | - Tatiana Shatseva
- Program in Cell Biology, Hospital for Sick Children, Toronto, Canada
| | - Gary F Lewis
- The Division of Endocrinology and Metabolism, Department of Medicine and the Banting and Best Diabetes Centre, University of Toronto, Toronto, Canada
| | - Albert K Groen
- Department of Pediatrics, Center for Liver, Digestive and Metabolic Diseases, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Dirk-Jan Reijngoud
- Department of Pediatrics, Center for Liver, Digestive and Metabolic Diseases, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Barbara M Bakker
- Department of Pediatrics, Center for Liver, Digestive and Metabolic Diseases, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands; Systems Biology Centre for Energy Metabolism and Ageing, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands
| | - Johan W Jonker
- Department of Pediatrics, Center for Liver, Digestive and Metabolic Diseases, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Peter K Kim
- Program in Cell Biology, Hospital for Sick Children, Toronto, Canada; Department of Biochemistry, University of Toronto, Toronto, Canada.
| | - Robert H J Bandsma
- Department of Pediatrics, Center for Liver, Digestive and Metabolic Diseases, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands; Physiology and Experimental Medicine Program, Research Institute, The Hospital for Sick Children, Toronto, Canada; Division of Gastroenterology, Hepatology and Nutrition, The Hospital for Sick Children, Toronto, Canada; Centre for Global Child Health, The Hospital for Sick Children, Toronto, Canada.
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30
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Bedi KC, Snyder NW, Brandimarto J, Aziz M, Mesaros C, Worth AJ, Wang LL, Javaheri A, Blair IA, Margulies KB, Rame JE. Evidence for Intramyocardial Disruption of Lipid Metabolism and Increased Myocardial Ketone Utilization in Advanced Human Heart Failure. Circulation 2016; 133:706-16. [PMID: 26819374 DOI: 10.1161/circulationaha.115.017545] [Citation(s) in RCA: 408] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Accepted: 12/28/2015] [Indexed: 12/16/2022]
Abstract
BACKGROUND The failing human heart is characterized by metabolic abnormalities, but these defects remains incompletely understood. In animal models of heart failure there is a switch from a predominance of fatty acid utilization to the more oxygen-sparing carbohydrate metabolism. Recent studies have reported decreases in myocardial lipid content, but the inclusion of diabetic and nondiabetic patients obscures the distinction of adaptations to metabolic derangements from adaptations to heart failure per se. METHODS AND RESULTS We performed both unbiased and targeted myocardial lipid surveys using liquid chromatography-mass spectroscopy in nondiabetic, lean, predominantly nonischemic, advanced heart failure patients at the time of heart transplantation or left ventricular assist device implantation. We identified significantly decreased concentrations of the majority of myocardial lipid intermediates, including long-chain acylcarnitines, the primary subset of energetic lipid substrate for mitochondrial fatty acid oxidation. We report for the first time significantly reduced levels of intermediate and anaplerotic acyl-coenzyme A (CoA) species incorporated into the Krebs cycle, whereas the myocardial concentration of acetyl-CoA was significantly increased in end-stage heart failure. In contrast, we observed an increased abundance of ketogenic β-hydroxybutyryl-CoA, in association with increased myocardial utilization of β-hydroxybutyrate. We observed a significant increase in the expression of the gene encoding succinyl-CoA:3-oxoacid-CoA transferase, the rate-limiting enzyme for myocardial oxidation of β-hydroxybutyrate and acetoacetate. CONCLUSIONS These findings indicate increased ketone utilization in the severely failing human heart independent of diabetes mellitus, and they support the role of ketone bodies as an alternative fuel and myocardial ketone oxidation as a key metabolic adaptation in the failing human heart.
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Affiliation(s)
- Kenneth C Bedi
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - Nathaniel W Snyder
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - Jeffrey Brandimarto
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - Moez Aziz
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - Clementina Mesaros
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - Andrew J Worth
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - Linda L Wang
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - Ali Javaheri
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - Ian A Blair
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - Kenneth B Margulies
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - J Eduardo Rame
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.).
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Lysne V, Strand E, Svingen GFT, Bjørndal B, Pedersen ER, Midttun Ø, Olsen T, Ueland PM, Berge RK, Nygård O. Peroxisome Proliferator-Activated Receptor Activation is Associated with Altered Plasma One-Carbon Metabolites and B-Vitamin Status in Rats. Nutrients 2016; 8:nu8010026. [PMID: 26742069 PMCID: PMC4728640 DOI: 10.3390/nu8010026] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 12/18/2015] [Accepted: 12/28/2015] [Indexed: 12/16/2022] Open
Abstract
Plasma concentrations of metabolites along the choline oxidation pathway have been linked to increased risk of major lifestyle diseases, and peroxisome proliferator-activated receptors (PPARs) have been suggested to be involved in the regulation of key enzymes along this pathway. In this study, we investigated the effect of PPAR activation on circulating and urinary one-carbon metabolites as well as markers of B-vitamin status. Male Wistar rats (n = 20) received for 50 weeks either a high-fat control diet or a high-fat diet with tetradecylthioacetic acid (TTA), a modified fatty acid and pan-PPAR agonist with high affinity towards PPARα. Hepatic gene expression of PPARα, PPARβ/δ and the enzymes involved in the choline oxidation pathway were analyzed and concentrations of metabolites were analyzed in plasma and urine. TTA treatment altered most biomarkers, and the largest effect sizes were observed for plasma concentrations of dimethylglycine, nicotinamide, methylnicotinamide, methylmalonic acid and pyridoxal, which were all higher in the TTA group (all p < 0.01). Hepatic Pparα mRNA was increased after TTA treatment, but genes of the choline oxidation pathway were not affected. Long-term TTA treatment was associated with pronounced alterations on the plasma and urinary concentrations of metabolites related to one-carbon metabolism and B-vitamin status in rats.
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Affiliation(s)
- Vegard Lysne
- Department of Clinical Science, University of Bergen, 5020 Bergen, Norway.
| | - Elin Strand
- Department of Clinical Science, University of Bergen, 5020 Bergen, Norway.
| | - Gard F T Svingen
- Department of Clinical Science, University of Bergen, 5020 Bergen, Norway.
- Department of Heart Disease, Haukeland University Hospital, 5021 Bergen, Norway.
| | - Bodil Bjørndal
- Department of Clinical Science, University of Bergen, 5020 Bergen, Norway.
| | - Eva R Pedersen
- Department of Clinical Science, University of Bergen, 5020 Bergen, Norway.
- Department of Heart Disease, Haukeland University Hospital, 5021 Bergen, Norway.
| | | | - Thomas Olsen
- Department of Clinical Science, University of Bergen, 5020 Bergen, Norway.
| | - Per M Ueland
- Department of Clinical Science, University of Bergen, 5020 Bergen, Norway.
- Laboratory of Clinical Biochemistry, Haukeland University Hospital, 5021 Bergen, Norway.
| | - Rolf K Berge
- Department of Clinical Science, University of Bergen, 5020 Bergen, Norway.
- Department of Heart Disease, Haukeland University Hospital, 5021 Bergen, Norway.
| | - Ottar Nygård
- Department of Clinical Science, University of Bergen, 5020 Bergen, Norway.
- Department of Heart Disease, Haukeland University Hospital, 5021 Bergen, Norway.
- KG Jebsen Centre for Diabetes Research, University of Bergen, 5009 Bergen, Norway.
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Medium-chain dicarboxylic acylcarnitines as markers of n-3 PUFA-induced peroxisomal oxidation of fatty acids. Mol Nutr Food Res 2015; 59:1573-83. [DOI: 10.1002/mnfr.201400743] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 03/29/2015] [Accepted: 03/30/2015] [Indexed: 02/02/2023]
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Vaz FM, van Vlies N. Dioxygenases of Carnitine Biosynthesis: 6- N-Trimethyllysine and γ-Butyrobetaine Hydroxylases. 2-OXOGLUTARATE-DEPENDENT OXYGENASES 2015. [DOI: 10.1039/9781782621959-00324] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
This chapter describes the state of knowledge of the two 2-oxoglutarate-dependent dioxygenases of carnitine biosynthesis: 6-N-trimethyllysine hydroxylase and γ-butyrobetaine hydroxylase. Both enzymes have been extensively investigated as carnitine plays an important role in fatty acid metabolism in animals and some other life forms. Carnitine metabolism is introduced followed by a comprehensive review of the properties of the two carnitine biosynthesis dioxygenases including their purification, kinetic and biophysical characterization, regulation and roles in metabolism.
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Affiliation(s)
- Frédéric M. Vaz
- Laboratory Genetic Metabolic Diseases, Departments of Paediatrics and Clinical Chemistry, Emma Children’s Hospital, Academic Medical Center 1105 AZ Amsterdam The Netherlands
| | - Naomi van Vlies
- Laboratory Genetic Metabolic Diseases, Departments of Paediatrics and Clinical Chemistry, Emma Children’s Hospital, Academic Medical Center 1105 AZ Amsterdam The Netherlands
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Gessner DK, Gröne B, Rosenbaum S, Most E, Hillen S, Becker S, Erhardt G, Reiner G, Eder K. Effect of dietary fish oil on the expression of genes involved in lipid metabolism in liver and skeletal muscle of lactating sows. J Anim Physiol Anim Nutr (Berl) 2015; 100:337-47. [DOI: 10.1111/jpn.12324] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Accepted: 03/03/2015] [Indexed: 01/10/2023]
Affiliation(s)
- D. K. Gessner
- Institute of Animal Nutrition and Nutrition Physiology; Justus-Liebig-University Giessen; Giessen Germany
| | - B. Gröne
- Institute of Animal Nutrition and Nutrition Physiology; Justus-Liebig-University Giessen; Giessen Germany
| | - S. Rosenbaum
- Institute of Animal Nutrition and Nutrition Physiology; Justus-Liebig-University Giessen; Giessen Germany
| | - E. Most
- Institute of Animal Nutrition and Nutrition Physiology; Justus-Liebig-University Giessen; Giessen Germany
| | - S. Hillen
- Department of Veterinary Clinical Sciences; Swine Diseases; Justus-Liebig-University Giessen; Giessen Germany
| | - S. Becker
- Department of Veterinary Clinical Sciences; Swine Diseases; Justus-Liebig-University Giessen; Giessen Germany
| | - G. Erhardt
- Institute for Animal Breeding and Genetics; Justus-Liebig-University Giessen; Giessen; Germany
| | - G. Reiner
- Department of Veterinary Clinical Sciences; Swine Diseases; Justus-Liebig-University Giessen; Giessen Germany
| | - K. Eder
- Institute of Animal Nutrition and Nutrition Physiology; Justus-Liebig-University Giessen; Giessen Germany
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Ide T, Azechi A, Kitade S, Kunimatsu Y, Suzuki N, Nakajima C, Ogata N. Comparative Effects of Sesame Seeds Differing in Lignan Contents and Composition on Fatty Acid Oxidation in Rat Liver. J Oleo Sci 2015; 64:211-22. [DOI: 10.5650/jos.ess14182] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Takashi Ide
- Department of Food and Nutrition, Faculty of Human Life, Jumonji University
| | - Ayana Azechi
- Department of Food and Nutrition, Faculty of Human Life, Jumonji University
| | - Sayaka Kitade
- Department of Food and Nutrition, Faculty of Human Life, Jumonji University
| | - Yoko Kunimatsu
- Department of Food and Nutrition, Faculty of Human Life, Jumonji University
| | - Natsuko Suzuki
- Department of Food and Nutrition, Faculty of Human Life, Jumonji University
| | - Chihiro Nakajima
- Department of Food and Nutrition, Faculty of Human Life, Jumonji University
| | - Naoki Ogata
- Institute of Crop Science, National Agriculture and Food Research Organization (NARO)
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36
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Luo H, Zhang Y, Guo H, Zhang L, Li X, Ringseis R, Wen G, Hui D, Liang A, Eder K, He D. Transcriptional regulation of the human, porcine and bovine OCTN2 gene by PPARα via a conserved PPRE located in intron 1. BMC Genet 2014; 15:90. [PMID: 25299939 PMCID: PMC4363911 DOI: 10.1186/s12863-014-0090-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Accepted: 08/06/2014] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND The novel organic cation transporter 2 (OCTN2) is the physiologically most important carnitine transporter in tissues and is responsible for carnitine absorption in the intestine, carnitine reabsorption in the kidney and distribution of carnitine between tissues. Genetic studies clearly demonstrated that the mouse OCTN2 gene is directly regulated by peroxisome proliferator-activated receptor α (PPARα). Despite its well conserved role as an important regulator of lipid catabolism in general, the specific genes under control of PPARα within each lipid metabolic pathway were shown to differ between species and it is currently unknown whether the OCTN2 gene is also a PPARα target gene in pig, cattle, and human. In the present study we examined the hypothesis that the porcine, bovine, and human OCTN2 gene are also PPARα target genes. RESULTS Using positional cloning and reporter gene assays we identified a functional PPRE, each in the intron 1 of the porcine, bovine, and human OCTN2 gene. Gel shift assay confirmed binding of PPARα to this PPRE in the porcine, bovine, and the human OCTN2 gene. CONCLUSIONS The results of the present study show that the porcine, bovine, and human OCTN2 gene, like the mouse OCTN2 gene, is directly regulated by PPARα. This suggests that regulation of genes involved in carnitine uptake by PPARα is highly conserved across species.
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Affiliation(s)
- Huidi Luo
- Institute of Animal Husbandry and Veterinary Medicine, Shanxi Provincial Academy of Agricultural Sciences, Taiyuan, 030031, P. R. China.
| | - Yuanqing Zhang
- Institute of Animal Husbandry and Veterinary Medicine, Shanxi Provincial Academy of Agricultural Sciences, Taiyuan, 030031, P. R. China.
| | - Huihui Guo
- Institute of Animal Husbandry and Veterinary Medicine, Shanxi Provincial Academy of Agricultural Sciences, Taiyuan, 030031, P. R. China.
| | - Li Zhang
- Institute of Animal Husbandry and Veterinary Medicine, Shanxi Provincial Academy of Agricultural Sciences, Taiyuan, 030031, P. R. China.
| | - Xi Li
- Institute of Animal Husbandry and Veterinary Medicine, Shanxi Provincial Academy of Agricultural Sciences, Taiyuan, 030031, P. R. China.
| | - Robert Ringseis
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University Giessen, 35392, Giessen, Germany.
| | - Gaiping Wen
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University Giessen, 35392, Giessen, Germany.
| | - Dequan Hui
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Biotechnology, Shanxi University, Taiyuan, 030006, P. R. China.
| | - Aihua Liang
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Biotechnology, Shanxi University, Taiyuan, 030006, P. R. China.
| | - Klaus Eder
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University Giessen, 35392, Giessen, Germany.
| | - Dongchang He
- Institute of Animal Husbandry and Veterinary Medicine, Shanxi Provincial Academy of Agricultural Sciences, Taiyuan, 030031, P. R. China.
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Ide T. Combined effect of sesamin and soybean phospholipid on hepatic fatty acid metabolism in rats. J Clin Biochem Nutr 2014; 54:210-8. [PMID: 24894022 PMCID: PMC4042142 DOI: 10.3164/jcbn.13-83] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2013] [Accepted: 01/21/2014] [Indexed: 11/22/2022] Open
Abstract
We studied the combined effect of sesamin (1:1 mixture of sesamin and episesamine) and soybean phospholipid on lipid metabolism in rats. Male rats were fed diets supplemented with 0 or 2 g/kg sesamin, and containing 0 or 50 g/kg soybean phospholipid, for 19 days. Sesamin and soybean phospholipid decreased serum triacylglycerol concentrations and the combination of these compounds further decreased the parameter in an additive fashion. Soybean phospholipid but not sesamin reduced the hepatic concentration of triacylglycerol. The combination failed to cause a strong decrease in hepatic triacylglycerol concentration, presumably due to the up-regulation of Cd36 by sesamin. Combination of sesamin and soybean phospholipid decreased the activity and mRNA levels of hepatic lipogenic enzymes in an additive fashion. Sesamin strongly increased the parameters of hepatic fatty acid oxidation enzymes. Soybean phospholipid increased hepatic activity of 3-hydroxyacyl-CoA dehydrogenase although it failed to affect the activity of other enzymes involved in fatty acid oxidation. Sesamin strongly increased hepatic concentration of carnitine. Sesamin and soybean phospholipid combination further increased this parameter, accompanying a parallel increase in mRNA expression of carnitine transporter. These changes can account for the strong decrease in serum triacylglycerol in rats fed a diet containing both sesamin and soybean phospholipid.
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Affiliation(s)
- Takashi Ide
- Department of Food and Nutrition, Faculty of Human Life, Jumonji University, 2-1-28 Sugasawa, Niiza, Saitama 352-8510, Japan
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38
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Integrated physiology and systems biology of PPARα. Mol Metab 2014; 3:354-71. [PMID: 24944896 PMCID: PMC4060217 DOI: 10.1016/j.molmet.2014.02.002] [Citation(s) in RCA: 398] [Impact Index Per Article: 39.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 02/20/2014] [Accepted: 02/21/2014] [Indexed: 12/23/2022] Open
Abstract
The Peroxisome Proliferator Activated Receptor alpha (PPARα) is a transcription factor that plays a major role in metabolic regulation. This review addresses the functional role of PPARα in intermediary metabolism and provides a detailed overview of metabolic genes targeted by PPARα, with a focus on liver. A distinction is made between the impact of PPARα on metabolism upon physiological, pharmacological, and nutritional activation. Low and high throughput gene expression analyses have allowed the creation of a comprehensive map illustrating the role of PPARα as master regulator of lipid metabolism via regulation of numerous genes. The map puts PPARα at the center of a regulatory hub impacting fatty acid uptake, fatty acid activation, intracellular fatty acid binding, mitochondrial and peroxisomal fatty acid oxidation, ketogenesis, triglyceride turnover, lipid droplet biology, gluconeogenesis, and bile synthesis/secretion. In addition, PPARα governs the expression of several secreted proteins that exert local and endocrine functions.
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39
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Nissim I, Horyn O, Daikhin Y, Chen P, Li C, Wehrli SL, Nissim I, Yudkoff M. The molecular and metabolic influence of long term agmatine consumption. J Biol Chem 2014; 289:9710-29. [PMID: 24523404 DOI: 10.1074/jbc.m113.544726] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Agmatine (AGM), a product of arginine decarboxylation, influences multiple physiologic and metabolic functions. However, the mechanism(s) of action, the impact on whole body gene expression and metabolic pathways, and the potential benefits and risks of long term AGM consumption are still a mystery. Here, we scrutinized the impact of AGM on whole body metabolic profiling and gene expression and assessed a plausible mechanism(s) of AGM action. Studies were performed in rats fed a high fat diet or standard chow. AGM was added to drinking water for 4 or 8 weeks. We used (13)C or (15)N tracers to assess metabolic reactions and fluxes and real time quantitative PCR to determine gene expression. The results demonstrate that AGM elevated the synthesis and tissue level of cAMP. Subsequently, AGM had a widespread impact on gene expression and metabolic profiling including (a) activation of peroxisomal proliferator-activated receptor-α and its coactivator, PGC1α, and (b) increased expression of peroxisomal proliferator-activated receptor-γ and genes regulating thermogenesis, gluconeogenesis, and carnitine biosynthesis and transport. The changes in gene expression were coupled with improved tissue and systemic levels of carnitine and short chain acylcarnitine, increased β-oxidation but diminished incomplete fatty acid oxidation, decreased fat but increased protein mass, and increased hepatic ureagenesis and gluconeogenesis but decreased glycolysis. These metabolic changes were coupled with reduced weight gain and a curtailment of the hormonal and metabolic derangements associated with high fat diet-induced obesity. The findings suggest that AGM elevated the synthesis and levels of cAMP, thereby mimicking the effects of caloric restriction with respect to metabolic reprogramming.
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40
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Pougovkina O, te Brinke H, Ofman R, van Cruchten AG, Kulik W, Wanders RJA, Houten SM, de Boer VCJ. Mitochondrial protein acetylation is driven by acetyl-CoA from fatty acid oxidation. Hum Mol Genet 2014; 23:3513-22. [PMID: 24516071 DOI: 10.1093/hmg/ddu059] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Mitochondria integrate metabolic networks for maintaining bioenergetic requirements. Deregulation of mitochondrial metabolic networks can lead to mitochondrial dysfunction, which is a common hallmark of many diseases. Reversible post-translational protein acetylation modifications are emerging as critical regulators of mitochondrial function and form a direct link between metabolism and protein function, via the metabolic intermediate acetyl-CoA. Sirtuins catalyze protein deacetylation, but how mitochondrial acetylation is determined is unclear. We report here a mechanism that explains mitochondrial protein acetylation dynamics in vivo. Food withdrawal in mice induces a rapid increase in hepatic protein acetylation. Furthermore, using a novel LC-MS/MS method, we were able to quantify protein acetylation in human fibroblasts. We demonstrate that inducing fatty acid oxidation in fibroblasts increases protein acetylation. Furthermore, we show by using radioactively labeled palmitate that fatty acids are a direct source for mitochondrial protein acetylation. Intriguingly, in a mouse model that resembles human very-long chain acyl-CoA dehydrogenase (VLCAD) deficiency, we demonstrate that upon food-withdrawal, hepatic protein hyperacetylation is absent. This indicates that functional fatty acid oxidation is necessary for protein acetylation to occur in the liver upon food withdrawal. Furthermore, we now demonstrate that protein acetylation is abundant in human liver peroxisomes, an organelle where acetyl-CoA is solely generated by fatty acid oxidation. Our findings provide a mechanism for metabolic control of protein acetylation, which provides insight into the pathophysiogical role of protein acetylation dynamics in fatty acid oxidation disorders and other metabolic diseases associated with mitochondrial dysfunction.
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Affiliation(s)
- Olga Pougovkina
- Laboratory Genetic Metabolic Diseases, Department of Clinical Chemistry and
| | - Heleen te Brinke
- Laboratory Genetic Metabolic Diseases, Department of Clinical Chemistry and
| | - Rob Ofman
- Laboratory Genetic Metabolic Diseases, Department of Clinical Chemistry and
| | | | - Wim Kulik
- Laboratory Genetic Metabolic Diseases, Department of Clinical Chemistry and
| | - Ronald J A Wanders
- Laboratory Genetic Metabolic Diseases, Department of Clinical Chemistry and Department of Pediatrics, Emma's Children Hospital, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
| | - Sander M Houten
- Laboratory Genetic Metabolic Diseases, Department of Clinical Chemistry and Department of Pediatrics, Emma's Children Hospital, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
| | - Vincent C J de Boer
- Laboratory Genetic Metabolic Diseases, Department of Clinical Chemistry and Department of Pediatrics, Emma's Children Hospital, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
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Romanatto T, Fiamoncini J, Wang B, Curi R, Kang JX. Elevated tissue omega-3 fatty acid status prevents age-related glucose intolerance in fat-1 transgenic mice. Biochim Biophys Acta Mol Basis Dis 2013; 1842:186-91. [PMID: 24211484 DOI: 10.1016/j.bbadis.2013.10.017] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2013] [Revised: 10/05/2013] [Accepted: 10/21/2013] [Indexed: 11/28/2022]
Abstract
The objective of this study was to investigate the impact of elevated tissue omega-3 (n-3) polyunsaturated fatty acids (PUFA) status on age-related glucose intolerance utilizing the fat-1 transgenic mouse model, which can endogenously synthesize n-3 PUFA from omega-6 (n-6) PUFA. Fat-1 and wild-type mice, maintained on the same dietary regime of a 10% corn oil diet, were tested at two different ages (2 months old and 8 months old) for various glucose homeostasis parameters and related gene expression. The older wild-type mice exhibited significantly increased levels of blood insulin, fasting blood glucose, liver triglycerides, and glucose intolerance, compared to the younger mice, indicating an age-related impairment of glucose homeostasis. In contrast, these age-related changes in glucose metabolism were largely prevented in the older fat-1 mice. Compared to the older wild-type mice, the older fat-1 mice also displayed a lower capacity for gluconeogenesis, as measured by pyruvate tolerance testing (PTT) and hepatic gene expression of phosphoenolpyruvate carboxykinase (PEPCK) and glucose 6 phosphatase (G6Pase). Furthermore, the older fat-1 mice showed a significant decrease in body weight, epididymal fat mass, inflammatory activity (NFκ-B and p-IκB expression), and hepatic lipogenesis (acetyl-CoA carboxylase (ACC) and fatty acid synthase (FAS) expression), as well as increased peroxisomal activity (70-kDa peroxisomal membrane protein (PMP70) and acyl-CoA oxidase1 (ACOX1) expression). Altogether, the older fat-1 mice exhibit improved glucose homeostasis in comparison to the older wild-type mice. These findings support the beneficial effects of elevated tissue n-3 fatty acid status in the prevention and treatment of age-related chronic metabolic diseases.
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Affiliation(s)
- Talita Romanatto
- Laboratory for Lipid Medicine and Technology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA; Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Jarlei Fiamoncini
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Bin Wang
- Laboratory for Lipid Medicine and Technology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Rui Curi
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Jing X Kang
- Laboratory for Lipid Medicine and Technology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.
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Koepsell H. The SLC22 family with transporters of organic cations, anions and zwitterions. Mol Aspects Med 2013; 34:413-35. [PMID: 23506881 DOI: 10.1016/j.mam.2012.10.010] [Citation(s) in RCA: 275] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2012] [Accepted: 08/18/2012] [Indexed: 12/14/2022]
Abstract
The SLC22 family contains 13 functionally characterized human plasma membrane proteins each with 12 predicted α-helical transmembrane domains. The family comprises organic cation transporters (OCTs), organic zwitterion/cation transporters (OCTNs), and organic anion transporters (OATs). The transporters operate as (1) uniporters which mediate facilitated diffusion (OCTs, OCTNs), (2) anion exchangers (OATs), and (3) Na(+)/zwitterion cotransporters (OCTNs). They participate in small intestinal absorption and hepatic and renal excretion of drugs, xenobiotics and endogenous compounds and perform homeostatic functions in brain and heart. Important endogeneous substrates include monoamine neurotransmitters, l-carnitine, α-ketoglutarate, cAMP, cGMP, prostaglandins, and urate. It has been shown that mutations of the SLC22 genes encoding these transporters cause specific diseases like primary systemic carnitine deficiency and idiopathic renal hypouricemia and are correlated with diseases such as Crohn's disease and gout. Drug-drug interactions at individual transporters may change pharmacokinetics and toxicities of drugs.
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Affiliation(s)
- Hermann Koepsell
- University of Würzburg, Institute of Anatomy and Cell Biology, Koellikerstr. 6, 97070 Würzburg, Germany.
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43
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Bjørndal B, Brattelid T, Strand E, Vigerust NF, Svingen GFT, Svardal A, Nygård O, Berge RK. Fish oil and the pan-PPAR agonist tetradecylthioacetic acid affect the amino acid and carnitine metabolism in rats. PLoS One 2013; 8:e66926. [PMID: 23826175 PMCID: PMC3691320 DOI: 10.1371/journal.pone.0066926] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Accepted: 05/10/2013] [Indexed: 01/05/2023] Open
Abstract
Peroxisome proliferator-activated receptors (PPARs) are important in the regulation of lipid and glucose metabolism. Recent studies have shown that PPARα-activation by WY 14,643 regulates the metabolism of amino acids. We investigated the effect of PPAR activation on plasma amino acid levels using two PPARα activators with different ligand binding properties, tetradecylthioacetic acid (TTA) and fish oil, where the pan-PPAR agonist TTA is a more potent ligand than omega-3 polyunsaturated fatty acids. In addition, plasma L-carnitine esters were investigated to reflect cellular fatty acid catabolism. Male Wistar rats (Rattus norvegicus) were fed a high-fat (25% w/w) diet including TTA (0.375%, w/w), fish oil (10%, w/w) or a combination of both. The rats were fed for 50 weeks, and although TTA and fish oil had hypotriglyceridemic effects in these animals, only TTA lowered the body weight gain compared to high fat control animals. Distinct dietary effects of fish oil and TTA were observed on plasma amino acid composition. Administration of TTA led to increased plasma levels of the majority of amino acids, except arginine and lysine, which were reduced. Fish oil however, increased plasma levels of only a few amino acids, and the combination showed an intermediate or TTA-dominated effect. On the other hand, TTA and fish oil additively reduced plasma levels of the L-carnitine precursor γ-butyrobetaine, as well as the carnitine esters acetylcarnitine, propionylcarnitine, valeryl/isovalerylcarnitine, and octanoylcarnitine. These data suggest that while both fish oil and TTA affect lipid metabolism, strong PPARα activation is required to obtain effects on amino acid plasma levels. TTA and fish oil may influence amino acid metabolism through different metabolic mechanisms.
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Affiliation(s)
- Bodil Bjørndal
- Department of Clinical Science, University of Bergen, Bergen, Norway.
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Rigault C, Le Borgne F, Tazir B, Benani A, Demarquoy J. A high-fat diet increases L-carnitine synthesis through a differential maturation of the Bbox1 mRNAs. BIOCHIMICA ET BIOPHYSICA ACTA 2013; 1831:370-7. [PMID: 23127966 DOI: 10.1016/j.bbalip.2012.10.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2012] [Revised: 10/15/2012] [Accepted: 10/26/2012] [Indexed: 12/30/2022]
Abstract
l-carnitine is a key molecule in both mitochondrial and peroxisomal lipid metabolisms. l-carnitine is biosynthesized from gamma-butyrobetaine by a reaction catalyzed by the gamma-butyrobetaine hydroxylase (Bbox1). The aim of this work was to identify molecular mechanisms involved in the regulation of l-carnitine biosynthesis and availability. Using 3' RACE, we identified four alternatively polyadenylated Bbox1 mRNAs in rat liver. We utilized a combination of in vitro experiments using hybrid constructs containing the Bbox1 3' UTR and in vivo experiments on rat liver mRNAs to reveal specificities in the different Bbox1 mRNA isoforms, especially in terms of polyadenylation efficiency, mRNA stability and translation efficiency. This complex maturation process of the Bbox1 mRNAs in the liver was studied on rats fed a high-fat diet. High-fat diet selectively increased the level of three Bbox1 mRNA isoforms in rat liver and the alternative use of polyadenylation sites contributed to the global increase in Bbox1 enzymatic activity and l-carnitine levels. Our results show that the maturation of Bbox1 mRNAs is nutritionally regulated in the liver through a selective polyadenylation process to adjust l-carnitine biosynthesis to the energy supply.
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Affiliation(s)
- Caroline Rigault
- Université de Bourgogne, BioperoxIL, EA 7270, Faculté Gabriel, 6 blvd Gabriel, 21000 Dijon, France
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Affiliation(s)
- Marieke G. Schooneman
- Department of Endocrinology and Metabolism, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
- Department of Clinical Chemistry, Laboratory Genetic Metabolic Diseases, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Frédéric M. Vaz
- Department of Clinical Chemistry, Laboratory Genetic Metabolic Diseases, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Sander M. Houten
- Department of Clinical Chemistry, Laboratory Genetic Metabolic Diseases, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
- Department of Pediatrics, Emma Children’s Hospital, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Maarten R. Soeters
- Department of Endocrinology and Metabolism, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
- Corresponding author: Maarten R. Soeters,
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Shibani M, Keller J, König B, Kluge H, Hirche F, Stangl G, Ringseis R, Eder K. Effects of fish oil and conjugated linoleic acids on carnitine homeostasis in laying hens. Br Poult Sci 2012; 53:431-8. [DOI: 10.1080/00071668.2012.713464] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- M. Shibani
- a Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-Universität Gießen , 35392 Gießen , Germany
| | - J. Keller
- a Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-Universität Gießen , 35392 Gießen , Germany
| | - B. König
- b Institute of Agricultural and Nutritional Sciences, Martin-Luther-Universität Halle-Wittenberg , 06120 Halle (Saale) , Germany
| | - H. Kluge
- b Institute of Agricultural and Nutritional Sciences, Martin-Luther-Universität Halle-Wittenberg , 06120 Halle (Saale) , Germany
| | - F. Hirche
- b Institute of Agricultural and Nutritional Sciences, Martin-Luther-Universität Halle-Wittenberg , 06120 Halle (Saale) , Germany
| | - G.I. Stangl
- b Institute of Agricultural and Nutritional Sciences, Martin-Luther-Universität Halle-Wittenberg , 06120 Halle (Saale) , Germany
| | - R. Ringseis
- a Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-Universität Gießen , 35392 Gießen , Germany
| | - K. Eder
- a Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-Universität Gießen , 35392 Gießen , Germany
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Ringseis R, Wen G, Eder K. Regulation of Genes Involved in Carnitine Homeostasis by PPARα across Different Species (Rat, Mouse, Pig, Cattle, Chicken, and Human). PPAR Res 2012; 2012:868317. [PMID: 23150726 PMCID: PMC3486131 DOI: 10.1155/2012/868317] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Accepted: 09/27/2012] [Indexed: 11/17/2022] Open
Abstract
Recent studies in rodents convincingly demonstrated that PPARα is a key regulator of genes involved in carnitine homeostasis, which serves as a reasonable explanation for the phenomenon that energy deprivation and fibrate treatment, both of which cause activation of hepatic PPARα, causes a strong increase of hepatic carnitine concentration in rats. The present paper aimed to comprehensively analyse available data from genetic and animal studies with mice, rats, pigs, cows, and laying hens and from human studies in order to compare the regulation of genes involved in carnitine homeostasis by PPARα across different species. Overall, our comparative analysis indicates that the role of PPARα as a regulator of carnitine homeostasis is well conserved across different species. However, despite demonstrating a well-conserved role of PPARα as a key regulator of carnitine homeostasis in general, our comprehensive analysis shows that this assumption particularly applies to the regulation by PPARα of carnitine uptake which is obviously highly conserved across species, whereas regulation by PPARα of carnitine biosynthesis appears less well conserved across species.
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Affiliation(s)
- Robert Ringseis
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 26-32, 35390 Giessen, Germany
| | - Gaiping Wen
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 26-32, 35390 Giessen, Germany
| | - Klaus Eder
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 26-32, 35390 Giessen, Germany
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Schlegel G, Ringseis R, Keller J, Schwarz FJ, Windisch W, Eder K. Expression of fibroblast growth factor 21 in the liver of dairy cows in the transition period and during lactation. J Anim Physiol Anim Nutr (Berl) 2012; 97:820-9. [PMID: 22805261 DOI: 10.1111/j.1439-0396.2012.01323.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Fibroblast growth factor 21 (FGF21) has been identified as a novel hormonal factor involved in the regulation of metabolic adaptations during energy deprivation. The present study aimed to investigate the expression of the FGF21 gene in the liver of dairy cows during the transition from pregnancy to lactation. Therefore, the relative mRNA abundance of FGF21 in liver biopsy samples of 20 dairy cows in late pregnancy (3 weeks pre-partum) and early lactation (1, 5, 14 weeks post-partum) was determined. It was observed that hepatic mRNA abundance of FGF21 at 1 week post-partum was dramatically increased (110-fold) compared to 3 weeks pre-partum (p < 0.001). With progress of lactation, mRNA concentration of FGF21 was declining; nevertheless, mRNA abundance at 5 and 14 weeks post-partum remained 25- and 10-fold increased compared to 3 weeks pre-partum (p < 0.001). Using a gene array technique, it was found that many genes involved in fatty acid oxidation, gluconeogenesis and ketogenesis were up-regulated during early lactation compared to late pregnancy. Moreover, there were positive linear correlations between hepatic mRNA concentration of FGF21 and mRNA concentrations of genes involved in ketogenesis as well as carnitine synthesis and carnitine uptake at various time-points during lactation, indicating that FGF21 could play a role in ketogenesis and carnitine metabolism in the liver of dairy cows (p < 0.05). In overall, the present study shows that expression of the FGF21 gene is strongly up-regulated during the transition period. It is assumed that the up-regulation of FGF21 might play an important role in the adaptation of liver metabolism during early lactation in dairy cows such as in other species.
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Affiliation(s)
- G Schlegel
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-Universität Gießen, Gießen, Germany Chair of Animal Nutrition, Department of Animal Sciences, Center of Life and Food Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
| | - R Ringseis
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-Universität Gießen, Gießen, Germany Chair of Animal Nutrition, Department of Animal Sciences, Center of Life and Food Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
| | - J Keller
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-Universität Gießen, Gießen, Germany Chair of Animal Nutrition, Department of Animal Sciences, Center of Life and Food Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
| | - F J Schwarz
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-Universität Gießen, Gießen, Germany Chair of Animal Nutrition, Department of Animal Sciences, Center of Life and Food Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
| | - W Windisch
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-Universität Gießen, Gießen, Germany Chair of Animal Nutrition, Department of Animal Sciences, Center of Life and Food Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
| | - K Eder
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-Universität Gießen, Gießen, Germany Chair of Animal Nutrition, Department of Animal Sciences, Center of Life and Food Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
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Ide T, Azechi A, Kitade S, Kunimatsu Y, Suzuki N, Nakajima C. Combined effect of sesamin and α-lipoic acid on hepatic fatty acid metabolism in rats. Eur J Nutr 2012; 52:1015-27. [DOI: 10.1007/s00394-012-0408-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Accepted: 06/18/2012] [Indexed: 11/30/2022]
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50
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Schlegel G, Keller J, Hirche F, Geissler S, Schwarz FJ, Ringseis R, Stangl GI, Eder K. Expression of genes involved in hepatic carnitine synthesis and uptake in dairy cows in the transition period and at different stages of lactation. BMC Vet Res 2012; 8:28. [PMID: 22417075 PMCID: PMC3361467 DOI: 10.1186/1746-6148-8-28] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2011] [Accepted: 03/14/2012] [Indexed: 12/14/2022] Open
Abstract
Background In rodents and pigs, it has shown that carnitine synthesis and uptake of carnitine into cells are regulated by peroxisome proliferator-activated receptor α (PPARA), a transcription factor which is physiologically activated during fasting or energy deprivation. Dairy cows are typically in a negative energy balance during early lactation. We investigated the hypothesis that genes of carnitine synthesis and uptake in dairy cows are enhanced during early lactation. Results mRNA abundances of PPARA and some of its classical target genes and genes involved in carnitine biosynthesis [trimethyllysine dioxygenase (TMLHE), 4-N-trimethylaminobutyraldehyde dehydrogenase (ALDH9A1), γ-butyrobetaine dioxygenase (BBOX1)] and uptake of carnitine [novel organic cation transporter 2 (SLC22A5)] as well as carnitine concentrations in liver biopsy samples of 20 dairy cows in late pregnancy (3 wk prepartum) and early lactation (1 wk, 5 wk, 14 wk postpartum) were determined. From 3 wk prepartum to 1 wk postpartum, mRNA abundances of PPARΑ and several PPARΑ target genes involved in fatty acid uptake, fatty acid oxidation and ketogenesis in the liver were strongly increased. Simultaneously, mRNA abundances of enzymes of carnitine synthesis (TMLHE: 10-fold; ALDH9A1: 6-fold; BBOX1: 1.8-fold) and carnitine uptake (SLC22A5: 13-fold) and the concentration of carnitine in the liver were increased from 3 wk prepartum to 1 wk postpartum (P < 0.05). From 1 wk to 5 and 14 wk postpartum, mRNA abundances of these genes and hepatic carnitine concentrations were declining (P < 0.05). There were moreover positive correlations between plasma concentrations of non-esterified fatty acids (NEFA) and hepatic carnitine concentrations at 1 wk, 5 wk and 14 wk postpartum (P < 0.05). Conclusions The results of this study show for the first time that the expression of hepatic genes of carnitine synthesis and cellular uptake of carnitine is enhanced in dairy cows during early lactation. These changes might provide an explanation for increased hepatic carnitine concentrations observed in 1 wk postpartum and might be regarded as a physiologic means to provide liver cells with sufficient carnitine required for transport of excessive amounts of NEFA during a negative energy balance.
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Affiliation(s)
- Gloria Schlegel
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-Universität Giessen, Giessen, Germany
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