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Liang Z, Ralph-Epps T, Schmidtke MW, Kumar V, Greenberg ML. Decreased pyruvate dehydrogenase activity in Tafazzin-deficient cells is caused by dysregulation of pyruvate dehydrogenase phosphatase 1 (PDP1). J Biol Chem 2024; 300:105697. [PMID: 38301889 PMCID: PMC10884759 DOI: 10.1016/j.jbc.2024.105697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 01/13/2024] [Accepted: 01/19/2024] [Indexed: 02/03/2024] Open
Abstract
Cardiolipin (CL), the signature lipid of the mitochondrial inner membrane, is critical for maintaining optimal mitochondrial function and bioenergetics. Disruption of CL metabolism, caused by mutations in the CL remodeling enzyme TAFAZZIN, results in the life-threatening disorder Barth syndrome (BTHS). While the clinical manifestations of BTHS, such as dilated cardiomyopathy and skeletal myopathy, point to defects in mitochondrial bioenergetics, the disorder is also characterized by broad metabolic dysregulation, including abnormal levels of metabolites associated with the tricarboxylic acid (TCA) cycle. Recent studies have identified the inhibition of pyruvate dehydrogenase (PDH), the gatekeeper enzyme for TCA cycle carbon influx, as a key deficiency in various BTHS model systems. However, the molecular mechanisms linking aberrant CL remodeling, particularly the primary, direct consequence of reduced tetralinoleoyl-CL (TLCL) levels, to PDH activity deficiency are not yet understood. In the current study, we found that remodeled TLCL promotes PDH function by directly binding to and enhancing the activity of PDH phosphatase 1 (PDP1). This is supported by our findings that TLCL uniquely activates PDH in a dose-dependent manner, TLCL binds to PDP1 in vitro, TLCL-mediated PDH activation is attenuated in the presence of phosphatase inhibitor, and PDP1 activity is decreased in Tafazzin-knockout (TAZ-KO) C2C12 myoblasts. Additionally, we observed decreased mitochondrial calcium levels in TAZ-KO cells and treating TAZ-KO cells with calcium lactate (CaLac) increases mitochondrial calcium and restores PDH activity and mitochondrial oxygen consumption rate. Based on our findings, we conclude that reduced mitochondrial calcium levels and decreased binding of PDP1 to TLCL contribute to decreased PDP1 activity in TAZ-KO cells.
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Affiliation(s)
- Zhuqing Liang
- Department of Biological Sciences, Wayne State University, Detroit, Michigan, USA
| | - Tyler Ralph-Epps
- Department of Biological Sciences, Wayne State University, Detroit, Michigan, USA
| | - Michael W Schmidtke
- Department of Biological Sciences, Wayne State University, Detroit, Michigan, USA
| | - Vikalp Kumar
- Department of Biological Sciences, Wayne State University, Detroit, Michigan, USA
| | - Miriam L Greenberg
- Department of Biological Sciences, Wayne State University, Detroit, Michigan, USA.
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Zhang L, Ma P, Wang Z, Xu T, Lam SM, Shui G, Wang Y, Xie J, Qiang G. Multiomics Approaches Identify Biomarkers for BAT Thermogenesis. J Proteome Res 2023; 22:3332-3347. [PMID: 37616386 DOI: 10.1021/acs.jproteome.3c00423] [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: 08/26/2023]
Abstract
Brown adipose tissue (BAT) thermogenesis confers beneficial effects on metabolic diseases such as obesity and type-2 diabetes. Nevertheless, the mechanism and lipid driving the process that evokes this response have not been investigated yet. Here, a multiomics approach of integrative transcriptomics and lipidomics is used to explore the mechanism of regulating thermogenesis in BAT and providing promising lipid biomarkers and biomarker genes for thermogenic activators as antiobesity drugs. Lipidomics analysis demonstrated that a high abundance of glycerophospholipids and sphingolipids was more significant in BAT than in WAT. Enrichment analysis of upregulated DEGs between WAT and BAT screened suggested that the differences were mainly involved in lipid metabolism. Besides, β3-adrenergic agonist stimulation reduced the levels of TAG and DAG and increased the content of PC, PE, CL, and LPC and expression of genes involved in thermogenesis, fatty acid elongation, and glycerophospholipid metabolism in BAT. In this study, based on interpreting the inherent characterization of BAT as thermogenic tissue through comparison with WAT as fat storage tissue, adrenergic stimulation-induced BAT thermogenesis further identified specific lipid biomarkers (7 TAG species, 10 PC species, 1 LPC species, and 1 CL species) and Elovl3 and Crat gene biomarkers, which may provide targets for combating obesity by boosting BAT thermogenesis.
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Affiliation(s)
- Li Zhang
- Inner Mongolia Clinical College, Inner Mongolia Medical University, Hohhot 010110, China
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College and Beijing Key Laboratory of Drug Target and Screening Research, Beijing 100050, China
| | - Peng Ma
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College and Beijing Key Laboratory of Drug Target and Screening Research, Beijing 100050, China
| | - Zijing Wang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College and Beijing Key Laboratory of Drug Target and Screening Research, Beijing 100050, China
| | - Tianshu Xu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College and Beijing Key Laboratory of Drug Target and Screening Research, Beijing 100050, China
| | - Sin Man Lam
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Guanghou Shui
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yuzhen Wang
- College of Life Science, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Jiming Xie
- Inner Mongolia Clinical College, Inner Mongolia Medical University, Hohhot 010110, China
- Clinical Laboratory, Inner Mongolia People's Hospital, Hohhot 010020, China
| | - Guifen Qiang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College and Beijing Key Laboratory of Drug Target and Screening Research, Beijing 100050, China
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Chen Q, Kovilakath A, Allegood J, Thompson J, Hu Y, Cowart LA, Lesnefsky EJ. Endoplasmic reticulum stress and mitochondrial dysfunction during aging: Role of sphingolipids. Biochim Biophys Acta Mol Cell Biol Lipids 2023; 1868:159366. [PMID: 37473835 PMCID: PMC11154090 DOI: 10.1016/j.bbalip.2023.159366] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 06/24/2023] [Accepted: 07/11/2023] [Indexed: 07/22/2023]
Abstract
The endoplasmic reticulum (ER) plays a key role in the regulation of protein folding, lipid synthesis, calcium homeostasis, and serves as a primary site of sphingolipid biosynthesis. ER stress (ER dysfunction) participates in the development of mitochondrial dysfunction during aging. Mitochondria are in close contact with the ER through shared mitochondria associated membranes (MAM). Alteration of sphingolipids contributes to mitochondria-driven cell injury. Cardiolipin is a phospholipid that is critical to maintain enzyme activity in the electron transport chain. The aim of the current study was to characterize the changes in sphingolipids and cardiolipin in ER, MAM, and mitochondria during the progression of aging in young (3 mo.), middle (18 mo.), and aged (24 mo.) C57Bl/6 mouse hearts. ER stress increased in hearts from 18 mo. mice and mice exhibited mitochondrial dysfunction by 24 mo. Hearts were pooled to isolate ER, MAM, and subsarcolemmal mitochondria (SSM). LC-MS/MS quantification of lipid content showed that aging increased ceramide content in ER and MAM. In addition, the contents of sphingomyelin and monohexosylceramides are also increased in the ER from aged mice. Aging increased the total cardiolipin content in the ER. Aging did not alter the total cardiolipin content in mitochondria or MAM yet altered the composition of cardiolipin with aging in line with increased oxidative stress compared to young mice. These results indicate that alteration of sphingolipids can contribute to the ER stress and mitochondrial dysfunction that occurs during aging.
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Affiliation(s)
- Qun Chen
- Department of Medicine (Division of Cardiology), Virginia Commonwealth University, Richmond, VA 23298, United States of America
| | - Anna Kovilakath
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, VA 23298, United States of America
| | - Jeremy Allegood
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, VA 23298, United States of America
| | - Jeremy Thompson
- Department of Medicine (Division of Cardiology), Virginia Commonwealth University, Richmond, VA 23298, United States of America
| | - Ying Hu
- Department of Medicine (Division of Cardiology), Virginia Commonwealth University, Richmond, VA 23298, United States of America
| | - L Ashley Cowart
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, VA 23298, United States of America; Richmond Department of Veterans Affairs Medical Center, Richmond, VA 23249, United States of America
| | - Edward J Lesnefsky
- Department of Medicine (Division of Cardiology), Virginia Commonwealth University, Richmond, VA 23298, United States of America; Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, VA 23298, United States of America; Department of Physiology and Biophysics, Virginia Commonwealth University, Richmond, VA 23298, United States of America; Richmond Department of Veterans Affairs Medical Center, Richmond, VA 23249, United States of America.
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Schweitzer GG, Ditzenberger GL, Hughey CC, Finck BN, Martino MR, Pacak CA, Byrne BJ, Cade WT. Elevated liver glycogenolysis mediates higher blood glucose during acute exercise in Barth syndrome. PLoS One 2023; 18:e0290832. [PMID: 37651450 PMCID: PMC10470866 DOI: 10.1371/journal.pone.0290832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 08/17/2023] [Indexed: 09/02/2023] Open
Abstract
Barth syndrome (BTHS) is an X-linked recessive genetic disorder due to mutations in the Tafazzin (TAFAZZIN) gene that lead to cardiac and skeletal muscle mitochondrial dysfunction. Previous studies in humans with BTHS demonstrate that the defects in muscle mitochondrial oxidative metabolism result in an enhanced reliance on anaerobic metabolism during exercise to meet energy demands of muscular work. During exercise, the liver normally increases glucose production via glycogenolysis and gluconeogenesis to match the elevated rate of muscle glucose uptake and meet the ATP requirements of working muscle. However, the impact of Tafazzin deficiency on hepatic glucose production and the pathways contributing to hepatic glucose production during exercise is unknown. Therefore, the purpose of this study was to quantify in vivo liver gluconeogenesis and glycogenolysis in Tafazzin knockdown mice at rest and during acute exercise. METHODS Male TAFAZZIN shRNA transgenic (TG) and wild-type (WT) mice completed exhaustive treadmill running protocols to test exercise tolerance. Mice underwent 2H- and 13C-stable isotope infusions at rest and during a 30-minute treadmill running bout to quantify hepatic glucose production and associated nutrient fluxes under sedentary conditions and during acute exercise. Circulating and tissue (skeletal muscle and liver) samples were obtained during and following exercise to assess static metabolite levels. RESULTS TG mice reached exhaustion sooner during exhaustive treadmill running protocols and exhibited higher plasma lactate concentrations after exhaustive exercise compared to WT mice. Arterial glucose levels were comparable between genotypes at rest, but higher in TG mice compared to WT mice during exercise. Consistent with the higher blood glucose, TG mice showed increased endogenous glucose production owing to elevated glycogenolysis compared to WT mice during exercise. Total gluconeogenesis, gluconeogenesis from glycerol, gluconeogenesis from phosphoenolpyruvate, pyruvate cycling, total cataplerosis, and anaplerotic fluxes were similar between TG and WT mice at rest and during exercise. However, lactate dehydrogenase flux and TCA cycle fluxes trended higher in TG mice during exercise. Liver glycogen content in TG was higher in TG vs. controls. CONCLUSION Our data in the Tafazzin knockdown mouse suggest that elevated anaerobic metabolism during rest and exercise previously reported in humans with BTHS are supported by the finding of higher hepatic glycogenolysis.
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Affiliation(s)
- George G. Schweitzer
- Center for Human Nutrition, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Grace L. Ditzenberger
- Doctor of Physical Therapy Division, Duke University School of Medicine, Durham, NC, United States of America
| | - Curtis C. Hughey
- Department of Medicine, Division of Molecular Medicine, University of Minnesota, Minneapolis, MN, United States of America
| | - Brian N. Finck
- Center for Human Nutrition, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Michael R. Martino
- Center for Human Nutrition, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Christina A. Pacak
- Department of Neurology, University of Minnesota School of Medicine, Minneapolis, MN, United States of America
| | - Barry J. Byrne
- Department of Pediatrics, College of Medicine, University of Florida, Gainesville, FL, United States of America
| | - William Todd Cade
- Doctor of Physical Therapy Division, Duke University School of Medicine, Durham, NC, United States of America
- Program in Physical Therapy, Washington University School of Medicine, St. Louis, Missouri, United States of America
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Zhang L, Fan Y, Galantini L, Schillén K, Del Giudice A, Du G, Wang Y. Noncovalent Bile Acid Oligomers as Facial Amphiphilic Antimicrobials. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:495-506. [PMID: 36529944 DOI: 10.1021/acs.langmuir.2c02787] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
New antimicrobial agents are needed to address the ever-growing risk of bacterial resistance, particularly for methicillin- and vancomycin-resistant Staphylococcus aureus (S. aureus). Here, we report a class of bile acid oligomers as facial amphiphilic antimicrobials, which are noncovalently fabricated by cholic acid (CA) and deoxycholic acid (DCA) with polyamines (e.g., diamines, diethylenetriamine, spermidine, and spermine). The antibacterial activities of these bile acid oligomers (CA/polyamines and DCA/polyamines) against S. aureus become stronger with increasing the amine group numbers of polyamines without obviously enhanced cytotoxicity and skin irritation. DCA/spermine, entirely composed of natural products, exhibits the best antibacterial activity but the lowest cytotoxicity and the weakest skin irritation. All CA/polyamines and DCA/polyamines form well-ordered ribbon-like aggregates, collecting numerous facial amphiphilic structures to significantly enhance the interactions with bacterial membranes. In particular, the biogenic polyamines with more than two amine groups provide extra positively charged sites, hence facilitating the binding of bile acid oligomers to the negatively charged outer membrane of the bacteria via electrostatic interaction. This in turn promotes more oligomeric bile acid units that can be inserted into the membrane through hydrophobic interaction between bile acids and lipid domains. The noncovalently constructed and separable amphiphilic antimicrobials can avoid the long-term coexistence of microorganisms and antibacterial molecules in different acting modes. Therefore, the noncovalent bile acid oligomers, especially those with higher oligomerization degrees, can be a potential approach to effectively enhance antibacterial activity, improve environmental friendliness, and reduce bacterial drug resistance.
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Affiliation(s)
- Liangchen Zhang
- Chinese Academy of Sciences Key Laboratory of Colloid, Interface, and Chemical Thermodynamics, Chinese Academy of Sciences Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Yaxun Fan
- Chinese Academy of Sciences Key Laboratory of Colloid, Interface, and Chemical Thermodynamics, Chinese Academy of Sciences Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Luciano Galantini
- Department of Chemistry, Sapienza University of Rome, P.O. Box 34-Roma 62, Piazzale A. Moro 5, I-00185 Roma, Italy
| | - Karin Schillén
- Division of Physical Chemistry, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Alessandra Del Giudice
- Department of Chemistry, Sapienza University of Rome, P.O. Box 34-Roma 62, Piazzale A. Moro 5, I-00185 Roma, Italy
| | - Guanqun Du
- Division of Physical Chemistry, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Yilin Wang
- Chinese Academy of Sciences Key Laboratory of Colloid, Interface, and Chemical Thermodynamics, Chinese Academy of Sciences Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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Wahia H, Fakayode OA, Mustapha AT, Zhou C, Dabbour M. Application and potential of multifrequency ultrasound in juice industry: Comprehensive analysis of inactivation and germination of Alicyclobacillus acidoterrestris spores. Crit Rev Food Sci Nutr 2022; 64:4561-4586. [PMID: 36412233 DOI: 10.1080/10408398.2022.2143475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The majority of acidic fruits are perishable owing to their high-water activity, which promotes microbial activity, thus exhibiting metabolic functions that cause spoilage. Along with sanitary practices, several treatments are used during processing and/or storage to inhibit the development of undesirable bacteria. To overcome the challenges caused by mild heat treatment, juice manufacturers have recently increased their involvement in developing novel non-thermal processing procedures. Ultrasonication alone or in combination with other hurdle technologies may be used to pasteurize processed fruit juices. Multifrequency ultrasound has gained popularity due to the fact that mono-frequency ultrasound has less impact on bacterial inactivation and bioactive compound enhancement of fruit juice. Here, we present and discuss the fundamental information and technological knowledge of how spoilage bacteria, specifically Alicyclobacillus acidoterrestris, assemble resistant spores and inactivate and germinate dormant spores in response to nutrient germinants and physical treatments such as heat and ultrasound. To the authors' knowledge, no prior review of ultrasonic inactivation and germination of A. acidoterrestris in fruit juice exists. Therefore, this article aims to provide a review of previously published research on the inactivation and germination of A. acidoterrestris in fruit juice by ultrasound and heat.
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Affiliation(s)
- Hafida Wahia
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, PR China
| | | | | | - Cunshan Zhou
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, PR China
- School of Biological and Food Engineering, Chuzhou University, Chuzhou, PR China
| | - Mokhtar Dabbour
- Department of Agricultural and Biosystems Engineering, Faculty of Agriculture, Benha University, Moshtohor, Qaluobia, Egypt
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7
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Sturm M, Gutowski O, Brezesinski G. The Effect of pH on the Structure and Lateral Organization of Cardiolipin in Langmuir Monolayers. Chemphyschem 2022; 23:e202200218. [PMID: 35920819 DOI: 10.1002/cphc.202200218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 06/17/2022] [Indexed: 01/07/2023]
Abstract
Cardiolipin (CL) is a unique phospholipid featuring a dimeric structure. With its four alkyl chains, it has a large hydrophobic region and the charged hydrophilic head group is relatively small. Biological membranes exhibit CL exclusively in the inner bacterial and mitochondrial membranes. Alteration of CL packing can lead to structural changes and membrane instabilities. One environmental influence is the change in pH. Since the acidic properties of the phosphate head groups remain still controversial in literature, this work focusses on the influence of pH on the ionization degree of CL. For the analyses, surface pressure (π) - molecular area (A) isotherm experiments were combined with total reflection X-ray fluorescence (TRXF) and grazing incidence X-ray diffraction (GIXD). Continuous ionization with a high CL packing density was observed in the monolayer over a wide pH range. No individual pKa values can be assigned to the two phosphate groups, but mutual influence is observed.
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Affiliation(s)
- Marina Sturm
- Photon Science, Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany
| | - Olof Gutowski
- Photon Science, Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany
| | - Gerald Brezesinski
- Institute of Applied Dermatopharmacy, Martin Luther University Halle-Wittenberg, Weinbergweg 23, 06120, Halle (Saale), Germany
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8
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Beignon F, Gueguen N, Tricoire-Leignel H, Mattei C, Lenaers G. The multiple facets of mitochondrial regulations controlling cellular thermogenesis. Cell Mol Life Sci 2022; 79:525. [PMID: 36125552 DOI: 10.1007/s00018-022-04523-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 07/21/2022] [Accepted: 08/09/2022] [Indexed: 12/01/2022]
Abstract
Understanding temperature production and regulation in endotherm organisms becomes a crucial challenge facing the increased frequency and intensity of heat strokes related to global warming. Mitochondria, located at the crossroad of metabolism, respiration, Ca2+ homeostasis, and apoptosis, were recently proposed to further act as cellular radiators, with an estimated inner temperature reaching 50 °C in common cell lines. This inner thermogenesis might be further exacerbated in organs devoted to produce consistent efforts as muscles, or heat as brown adipose tissue, in response to acute solicitations. Consequently, pathways promoting respiratory chain uncoupling and mitochondrial activity, such as Ca2+ fluxes, uncoupling proteins, futile cycling, and substrate supplies, provide the main processes controlling heat production and cell temperature. The mitochondrial thermogenesis might be further amplified by cytoplasmic mechanisms promoting the over-consumption of ATP pools. Considering these new thermic paradigms, we discuss here all conventional wisdoms linking mitochondrial functions to cellular thermogenesis in different physiological conditions.
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Affiliation(s)
- Florian Beignon
- Univ Angers, MitoLab, Unité MITOVASC, UMR CNRS 6015, INSERM U1083, SFR ICAT, Angers, France.
| | - Naig Gueguen
- Univ Angers, MitoLab, Unité MITOVASC, UMR CNRS 6015, INSERM U1083, SFR ICAT, Angers, France.,Service de Biochimie et Biologie Moléculaire, CHU d'Angers, Angers, France
| | | | - César Mattei
- Univ Angers, CarMe, Unité MITOVASC, UMR CNRS 6015, INSERM U1083, SFR ICAT, Angers, France
| | - Guy Lenaers
- Univ Angers, MitoLab, Unité MITOVASC, UMR CNRS 6015, INSERM U1083, SFR ICAT, Angers, France. .,Service de Neurologie, CHU d'Angers, Angers, France.
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Alnajim I, Aldosary N, Agarwal M, Liu T, Du X, Ren Y. Role of Lipids in Phosphine Resistant Stored-Grain Insect Pests Tribolium castaneum and Rhyzopertha dominica. INSECTS 2022; 13:798. [PMID: 36135499 PMCID: PMC9503450 DOI: 10.3390/insects13090798] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 08/30/2022] [Accepted: 08/30/2022] [Indexed: 06/16/2023]
Abstract
Insects rely on lipids as an energy source to perform various activities, such as growth, flight, diapause, and metamorphosis. This study evaluated the role of lipids in phosphine resistance by stored-grain insects. Phosphine resistant and susceptible strains of the two main stored-grain insects, Tribolium castaneum and Rhyzopertha dominica, were analyzed using liquid chromatography-mass spectroscopy (LC-MS) to determine their lipid contents. Phosphine resistant strains of both species had a higher amount of lipids than susceptible stains. Significant variance ratios between the resistant and susceptible strains of T. castaneum were observed for glycerolipids (1.13- to 53.10-fold) and phospholipids (1.05- to 20.00-fold). Significant variance ratios between the resistant and susceptible strains of R. dominica for glycerolipids were 1.04- to 31.50-fold and for phospholipids were 1.04- to 10.10-fold. Glycerolipids are reservoirs to face the long-term energy shortage. Phospholipids act as a barrier to isolate the cells from the surrounding environment and allow each cell to perform its specific function. Thus, lipids offer a consistent energy source for the resistant insect to survive under the stress of phosphine fumigation and provide a suitable environment to protect the mitochondria from phosphine. Hence, it was proposed through this study that the lipid content of phosphine-resistant and phosphine-susceptible strains of T. castaneum and R. dominica could play an important role in the resistance of phosphine.
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Affiliation(s)
- Ihab Alnajim
- Date Palm Research Center, University of Basrah, Basra 61004, Iraq
- College of Science, Health, Engineering and Education, Murdoch University, Perth, WA 6150, Australia
| | - Naser Aldosary
- Date Palm Research Center, University of Basrah, Basra 61004, Iraq
| | - Manjree Agarwal
- College of Science, Health, Engineering and Education, Murdoch University, Perth, WA 6150, Australia
- Chemcentre, Resources and Chemistry Precinct, Bentley, WA 6102, Australia
| | - Tao Liu
- Institute of Equipment Technology, Chinese Academy of Inspection and Quarantine, No. A3, Gaobeidianbeilu, Chaoyang District, Beijing 100123, China
| | - Xin Du
- College of Science, Health, Engineering and Education, Murdoch University, Perth, WA 6150, Australia
| | - Yonglin Ren
- College of Science, Health, Engineering and Education, Murdoch University, Perth, WA 6150, Australia
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Guérin A, Angebault C, Kinet S, Cazevieille C, Rojo M, Fauconnier J, Lacampagne A, Mourier A, Taylor N, de Santa Barbara P, Faure S. LIX1-mediated changes in mitochondrial metabolism control the fate of digestive mesenchyme-derived cells. Redox Biol 2022; 56:102431. [PMID: 35988446 PMCID: PMC9420520 DOI: 10.1016/j.redox.2022.102431] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 08/03/2022] [Indexed: 11/06/2022] Open
Abstract
YAP1 and TAZ are transcriptional co-activator proteins that play fundamental roles in many biological processes, from cell proliferation and cell lineage fate determination to tumorigenesis. We previously demonstrated that Limb Expression 1 (LIX1) regulates YAP1 and TAZ activity and controls digestive mesenchymal progenitor proliferation. However, LIX1 mode of action remains elusive. Here, we found that endogenous LIX1 is localized in mitochondria and is anchored to the outer mitochondrial membrane through S-palmitoylation of cysteine 84, a residue conserved in all LIX1 orthologs. LIX1 downregulation altered the mitochondrial ultrastructure, resulting in a significantly decreased respiration and attenuated production of mitochondrial reactive oxygen species (mtROS). Mechanistically, LIX1 knock-down impaired the stability of the mitochondrial proteins PHB2 and OPA1 that are found in complexes with mitochondrial-specific phospholipids and are required for cristae organization. Supplementation with unsaturated fatty acids counteracted the effects of LIX1 knock-down on mitochondrial morphology and ultrastructure and restored YAP1/TAZ signaling. Collectively, our data demonstrate that LIX1 is a key regulator of cristae organization, modulating mtROS level and subsequently regulating the signaling cascades that control fate commitment of digestive mesenchyme-derived cells. LIX1 is tightly anchored to the outer membrane of mitochondria. LIX1 mitochondrial localization is mediated by S-palmitoylation on cysteine 84. LIX1 knock-down reduces the stability of the mitochondrial proteins PHB2 and OPA1 and impairs cristae organization. Redox signaling modulations regulate YAP1/TAZ activity and control fate commitment of digestive mesenchyme-derived cells.
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Affiliation(s)
- Amandine Guérin
- PhyMedExp, University of Montpellier, INSERM, CNRS, Montpellier, France
| | - Claire Angebault
- PhyMedExp, University of Montpellier, INSERM, CNRS, Montpellier, France
| | - Sandrina Kinet
- Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS, Montpellier, France
| | - Chantal Cazevieille
- Institut de Neurosciences de Montpellier, University of Montpellier, INSERM, Montpellier, France
| | - Manuel Rojo
- Centre National de la Recherche Scientifique, Université de Bordeaux, IBGC UMR, 5095, Bordeaux, France
| | - Jérémy Fauconnier
- PhyMedExp, University of Montpellier, INSERM, CNRS, Montpellier, France
| | - Alain Lacampagne
- PhyMedExp, University of Montpellier, INSERM, CNRS, Montpellier, France
| | - Arnaud Mourier
- Centre National de la Recherche Scientifique, Université de Bordeaux, IBGC UMR, 5095, Bordeaux, France
| | - Naomi Taylor
- Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS, Montpellier, France
| | | | - Sandrine Faure
- PhyMedExp, University of Montpellier, INSERM, CNRS, Montpellier, France.
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11
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Designer phospholipids – structural retrieval, chemo-/bio- synthesis and isotopic labeling. Biotechnol Adv 2022; 60:108025. [DOI: 10.1016/j.biotechadv.2022.108025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 07/12/2022] [Accepted: 07/26/2022] [Indexed: 11/23/2022]
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12
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Assessing Drug-Induced Mitochondrial Toxicity in Cardiomyocytes: Implications for Preclinical Cardiac Safety Evaluation. Pharmaceutics 2022; 14:pharmaceutics14071313. [PMID: 35890211 PMCID: PMC9319223 DOI: 10.3390/pharmaceutics14071313] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 06/09/2022] [Accepted: 06/14/2022] [Indexed: 02/07/2023] Open
Abstract
Drug-induced cardiotoxicity not only leads to the attrition of drugs during development, but also contributes to the high morbidity and mortality rates of cardiovascular diseases. Comprehensive testing for proarrhythmic risks of drugs has been applied in preclinical cardiac safety assessment for over 15 years. However, other mechanisms of cardiac toxicity have not received such attention. Of them, mitochondrial impairment is a common form of cardiotoxicity and is known to account for over half of cardiovascular adverse-event-related black box warnings imposed by the U.S. Food and Drug Administration. Although it has been studied in great depth, mitochondrial toxicity assessment has not yet been incorporated into routine safety tests for cardiotoxicity at the preclinical stage. This review discusses the main characteristics of mitochondria in cardiomyocytes, drug-induced mitochondrial toxicities, and high-throughput screening strategies for cardiomyocytes, as well as their proposed integration into preclinical safety pharmacology. We emphasize the advantages of using adult human primary cardiomyocytes for the evaluation of mitochondrial morphology and function, and the need for a novel cardiac safety testing platform integrating mitochondrial toxicity and proarrhythmic risk assessments in cardiac safety evaluation.
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13
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Mitochondrial Lipids: From Membrane Organization to Apoptotic Facilitation. Int J Mol Sci 2022; 23:ijms23073738. [PMID: 35409107 PMCID: PMC8998749 DOI: 10.3390/ijms23073738] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 03/23/2022] [Accepted: 03/25/2022] [Indexed: 02/04/2023] Open
Abstract
Mitochondria are the most complex intracellular organelles, their function combining energy production for survival and apoptosis facilitation for death. Such a multivariate physiology is structurally and functionally reflected upon their membrane configuration and lipid composition. Mitochondrial double membrane lipids, with cardiolipin as the protagonist, show an impressive level of complexity that is mandatory for maintenance of mitochondrial health and protection from apoptosis. Given that lipidomics is an emerging field in cancer research and that mitochondria are the organelles with the most important role in malignant maintenance knowledge of the mitochondrial membrane, lipid physiology in health is mandatory. In this review, we will thus describe the delicate nature of the healthy mitochondrial double membrane and its role in apoptosis. Emphasis will be given on mitochondrial membrane lipids and the changes that they undergo during apoptosis induction and progression.
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14
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Murakami A, Nagao K, Sakaguchi R, Kida K, Hara Y, Mori Y, Okabe K, Harada Y, Umeda M. Cell-autonomous control of intracellular temperature by unsaturation of phospholipid acyl chains. Cell Rep 2022; 38:110487. [PMID: 35294880 DOI: 10.1016/j.celrep.2022.110487] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 12/03/2021] [Accepted: 02/14/2022] [Indexed: 11/25/2022] Open
Abstract
Intracellular temperature affects a wide range of cellular functions in living organisms. However, it remains unclear whether temperature in individual animal cells is controlled autonomously as a response to fluctuations in environmental temperature. Using two distinct intracellular thermometers, we find that the intracellular temperature of steady-state Drosophila S2 cells is maintained in a manner dependent on Δ9-fatty acid desaturase DESAT1, which introduces a double bond at the Δ9 position of the acyl moiety of acyl-CoA. The DESAT1-mediated increase of intracellular temperature is caused by the enhancement of F1Fo-ATPase-dependent mitochondrial respiration, which is coupled with thermogenesis. We also reveal that F1Fo-ATPase-dependent mitochondrial respiration is potentiated by cold exposure through the remodeling of mitochondrial cristae structures via DESAT1-dependent unsaturation of mitochondrial phospholipid acyl chains. Based on these findings, we propose a cell-autonomous mechanism for intracellular temperature control during environmental temperature changes.
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Affiliation(s)
- Akira Murakami
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan; Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
| | - Kohjiro Nagao
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan.
| | - Reiko Sakaguchi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Keisuke Kida
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Yuji Hara
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Yasuo Mori
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Kohki Okabe
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
| | - Yoshie Harada
- Institute for Protein Research, Osaka University, Osaka 565-0871, Japan
| | - Masato Umeda
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan.
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15
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Morro B, Broughton R, Balseiro P, Handeland SO, Mackenzie S, Doherty MK, Whitfield PD, Shimizu M, Gorissen M, Sveier H, Albalat A. Endoplasmic reticulum stress as a key mechanism in stunted growth of seawater rainbow trout (Oncorhynchus mykiss). BMC Genomics 2021; 22:824. [PMID: 34781893 PMCID: PMC8594166 DOI: 10.1186/s12864-021-08153-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 11/01/2021] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Rainbow trout (Oncorhynchus mykiss) is a salmonid species with a complex life-history. Wild populations are naturally divided into freshwater residents and sea-run migrants. Migrants undergo an energy-demanding adaptation for life in seawater, known as smoltification, while freshwater residents display these changes in an attenuated magnitude and rate. Despite this, in seawater rainbow trout farming all fish are transferred to seawater. Under these circumstances, weeks after seawater transfer, a significant portion of the fish die (around 10%) or experience growth stunting (GS; around 10%), which represents an important profitability and welfare issue. The underlying causes leading to GS in seawater-transferred rainbow trout remain unknown. In this study, we aimed at characterising the GS phenotype in seawater-transferred rainbow trout using untargeted and targeted approaches. To this end, the liver proteome (LC-MS/MS) and lipidome (LC-MS) of GS and fast-growing phenotypes were profiled to identify molecules and processes that are characteristic of the GS phenotype. Moreover, the transcription, abundance or activity of key proteins and hormones related to osmoregulation (Gill Na+, K + -ATPase activity), growth (plasma IGF-I, and liver igf1, igfbp1b, ghr1 and ctsl) and stress (plasma cortisol) were measured using targeted approaches. RESULTS No differences in Gill Na+, K + -ATPase activity and plasma cortisol were detected between the two groups. However, a significant downregulation in plasma IGF-I and liver igf1 transcription pointed at this growth factor as an important pathomechanism for GS. Changes in the liver proteome revealed reactive-oxygen-species-mediated endoplasmic reticulum stress as a key mechanism underlying the GS phenotype. From the lipidomic analysis, key observations include a reduction in triacylglycerols and elevated amounts of cardiolipins, a characteristic lipid class associated with oxidative stress, in GS phenotype. CONCLUSION While the triggers to the activation of endoplasmic reticulum stress are still unknown, data from this study point towards a nutritional deficiency as an underlying driver of this phenotype.
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Affiliation(s)
- Bernat Morro
- Institute of Aquaculture, University of Stirling, Stirling, UK
| | | | - Pablo Balseiro
- NORCE AS, Bergen, Norway.,Department of Biological Sciences, University of Bergen, Bergen, Norway
| | - Sigurd O Handeland
- NORCE AS, Bergen, Norway.,Department of Biological Sciences, University of Bergen, Bergen, Norway
| | - Simon Mackenzie
- Institute of Aquaculture, University of Stirling, Stirling, UK.,NORCE AS, Bergen, Norway
| | - Mary K Doherty
- Institute of Health Research and Innovation, Centre for Health Science, University of the Highlands and Islands, Scotland, UK
| | - Phillip D Whitfield
- Institute of Health Research and Innovation, Centre for Health Science, University of the Highlands and Islands, Scotland, UK.,Institute of Infection, Immunity and Inflammation, University of Glasgow, Scotland, UK
| | - Munetaka Shimizu
- Faculty of Fisheries Sciences, Hokkaido University, Sapporo, Japan
| | - Marnix Gorissen
- Department of Animal Ecology and Physiology, Radboud University, Institute of Water and Wetland Research, Nijmegen, The Netherlands
| | | | - Amaya Albalat
- Institute of Aquaculture, University of Stirling, Stirling, UK.
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16
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Michaelsen J, Fago A, Bundgaard A. High temperature impairs mitochondrial function in rainbow trout cardiac mitochondria. J Exp Biol 2021; 224:jeb.242382. [DOI: 10.1242/jeb.242382] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 03/18/2021] [Indexed: 12/17/2022]
Abstract
ABSTRACT
Mitochondria provide cellular energy through oxidative phosphorylation, and thus temperature-induced constraints on mitochondrial function may be crucial to animal aerobic scope and thermal tolerance. Here, we report the effect of temperature in the range 5–30°C on respiration rates of isolated cardiac mitochondria from rainbow trout (Oncorhynchus mykiss) studied by high-resolution respirometry and spectrophotometric enzyme activity assays. Arrhenius breakpoint temperature analysis indicated that mitochondrial respiration rates under phosphorylating and fully uncoupled conditions increased exponentially up to 20°C, but stopped increasing at higher temperatures. In contrast, respiration rates measured under non-phosphorylating leak conditions continued to increase up to 30°C. The decrease in the ratio between phosphorylating and uncoupled respiration at high temperature indicated that phosphorylation was gradually impaired with increasing temperature, possibly because of the steadily increasing proton leak across the membrane. In addition, we found that complex I (NADH dehydrogenase) activity decreased above 20°C, similarly to mitochondrial respiration, and that complex I was unstable in the presence of detergents, suggesting that it may be particularly sensitive to changes in its interaction with membrane phospholipids. In contrast, complex II (succinate dehydrogenase) maintained activity at temperatures above 20°C, although succinate oxidation was insufficient to compensate for the loss of complex I activity in intact mitochondria. Together, these results indicate that the temperature-induced decrease in cardiac mitochondrial function coincides with the temperature at which trout aerobic scope peaks, and is largely due to impaired phosphorylation and complex I activity.
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Affiliation(s)
- Jakob Michaelsen
- Department of Biology, Aarhus University, 8000 Aarhus C, Denmark
| | - Angela Fago
- Department of Biology, Aarhus University, 8000 Aarhus C, Denmark
| | - Amanda Bundgaard
- Department of Biology, Aarhus University, 8000 Aarhus C, Denmark
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17
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Lunetti P, Capobianco L, Zara V, Ferramosca A. Physical Activity and Male Reproductive Function: A New Role for Gamete Mitochondria. Exerc Sport Sci Rev 2021; 49:99-106. [PMID: 33720911 DOI: 10.1249/jes.0000000000000245] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Several studies demonstrated that some types of physical exercise might affect male reproductive potential, even though the potential mechanisms involved in the modulation of sperm quality remain poorly understood. Therefore, we propose a new role for gamete mitochondria as a key hub that coordinates molecular events related to the effects induced by physical exercise.
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Affiliation(s)
- Paola Lunetti
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy
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18
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Kaliszewska A, Allison J, Martini M, Arias N. Improving Age-Related Cognitive Decline through Dietary Interventions Targeting Mitochondrial Dysfunction. Int J Mol Sci 2021; 22:ijms22073574. [PMID: 33808221 PMCID: PMC8036520 DOI: 10.3390/ijms22073574] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 03/24/2021] [Accepted: 03/25/2021] [Indexed: 12/13/2022] Open
Abstract
Aging is inevitable and it is one of the major contributors to cognitive decline. However, the mechanisms underlying age-related cognitive decline are still the object of extensive research. At the biological level, it is unknown how the aging brain is subjected to progressive oxidative stress and neuroinflammation which determine, among others, mitochondrial dysfunction. The link between mitochondrial dysfunction and cognitive impairment is becoming ever more clear by the presence of significant neurological disturbances in human mitochondrial diseases. Possibly, the most important lifestyle factor determining mitochondrial functioning is nutrition. Therefore, with the present work, we review the latest findings disclosing a link between nutrition, mitochondrial functioning and cognition, and pave new ways to counteract cognitive decline in late adulthood through diet.
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Affiliation(s)
- Aleksandra Kaliszewska
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, Denmark Hill, London SE5 8AF, UK; (A.K.); (J.A.)
| | - Joseph Allison
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, Denmark Hill, London SE5 8AF, UK; (A.K.); (J.A.)
| | - Matteo Martini
- Department of Psychology, University of East London, London E154LZ, UK;
| | - Natalia Arias
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, Denmark Hill, London SE5 8AF, UK; (A.K.); (J.A.)
- Instituto de Neurociencias del Principado de Asturias (INEUROPA), 33005 Oviedo, Spain
- Correspondence:
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19
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Abstract
Barth syndrome (BTHS) is a rare, X-linked recessive, infantile-onset debilitating disorder characterized by early-onset cardiomyopathy, skeletal muscle myopathy, growth delay, and neutropenia, with a worldwide incidence of 1/300,000-400,000 live births. The high mortality rate throughout infancy in BTHS patients is related primarily to progressive cardiomyopathy and a weakened immune system. BTHS is caused by defects in the TAZ gene that encodes tafazzin, a transacylase responsible for the remodeling and maturation of the mitochondrial phospholipid cardiolipin (CL), which is critical to normal mitochondrial structure and function (i.e., ATP generation). A deficiency in tafazzin results in up to a 95% reduction in levels of structurally mature CL. Because the heart is the most metabolically active organ in the body, with the highest mitochondrial content of any tissue, mitochondrial dysfunction plays a key role in the development of heart failure in patients with BTHS. Changes in mitochondrial oxidative phosphorylation reduce the ability of mitochondria to meet the ATP demands of the human heart as well as skeletal muscle, namely ATP synthesis does not match the rate of ATP consumption. The presence of several cardiomyopathic phenotypes have been described in BTHS, including dilated cardiomyopathy, left ventricular noncompaction, either alone or in conjunction with other cardiomyopathic phenotypes, endocardial fibroelastosis, hypertrophic cardiomyopathy, and an apical form of hypertrophic cardiomyopathy, among others, all of which can be directly attributed to the lack of CL synthesis, remodeling, and maturation with subsequent mitochondrial dysfunction. Several mechanisms by which these cardiomyopathic phenotypes exist have been proposed, thereby identifying potential targets for treatment. Dysfunction of the sarcoplasmic reticulum Ca2+-ATPase pump and inflammation potentially triggered by circulating mitochondrial components have been identified. Currently, treatment modalities are aimed at addressing symptomatology of HF in BTHS, but do not address the underlying pathology. One novel therapeutic approach includes elamipretide, which crosses the mitochondrial outer membrane to localize to the inner membrane where it associates with cardiolipin to enhance ATP synthesis in several organs, including the heart. Encouraging clinical results of the use of elamipretide in treating patients with BTHS support the potential use of this drug for management of this rare disease.
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Affiliation(s)
- Hani N Sabbah
- Department of Medicine, Division of Cardiovascular Medicine, Henry Ford Hospital, Henry Ford Health System, 2799 West Grand Boulevard, Detroit, MI, 48202, USA.
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20
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Ramaccini D, Montoya-Uribe V, Aan FJ, Modesti L, Potes Y, Wieckowski MR, Krga I, Glibetić M, Pinton P, Giorgi C, Matter ML. Mitochondrial Function and Dysfunction in Dilated Cardiomyopathy. Front Cell Dev Biol 2021; 8:624216. [PMID: 33511136 PMCID: PMC7835522 DOI: 10.3389/fcell.2020.624216] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 12/16/2020] [Indexed: 12/14/2022] Open
Abstract
Cardiac tissue requires a persistent production of energy in order to exert its pumping function. Therefore, the maintenance of this function relies on mitochondria that represent the “powerhouse” of all cardiac activities. Mitochondria being one of the key players for the proper functioning of the mammalian heart suggests continual regulation and organization. Mitochondria adapt to cellular energy demands via fusion-fission events and, as a proof-reading ability, undergo mitophagy in cases of abnormalities. Ca2+ fluxes play a pivotal role in regulating all mitochondrial functions, including ATP production, metabolism, oxidative stress balance and apoptosis. Communication between mitochondria and others organelles, especially the sarcoplasmic reticulum is required for optimal function. Consequently, abnormal mitochondrial activity results in decreased energy production leading to pathological conditions. In this review, we will describe how mitochondrial function or dysfunction impacts cardiac activities and the development of dilated cardiomyopathy.
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Affiliation(s)
- Daniela Ramaccini
- University of Hawaii Cancer Center, Honolulu, HI, United States.,Department of Medical Sciences, University of Ferrara, Ferrara, Italy.,Laboratory of Technologies for Advanced Therapy (LTTA), Technopole of Ferrara, Ferrara, Italy
| | | | - Femke J Aan
- University of Hawaii Cancer Center, Honolulu, HI, United States
| | - Lorenzo Modesti
- Department of Medical Sciences, University of Ferrara, Ferrara, Italy.,Laboratory of Technologies for Advanced Therapy (LTTA), Technopole of Ferrara, Ferrara, Italy
| | - Yaiza Potes
- Laboratory of Mitochondrial Biology and Metabolism, Nencki Institute of Experimental Biology of Polish Academy of Sciences, Warsaw, Poland
| | - Mariusz R Wieckowski
- Laboratory of Mitochondrial Biology and Metabolism, Nencki Institute of Experimental Biology of Polish Academy of Sciences, Warsaw, Poland
| | - Irena Krga
- Center of Research Excellence in Nutrition and Metabolism, Institute for Medical Research, University of Belgrade, Belgrade, Serbia
| | - Marija Glibetić
- Center of Research Excellence in Nutrition and Metabolism, Institute for Medical Research, University of Belgrade, Belgrade, Serbia
| | - Paolo Pinton
- Department of Medical Sciences, University of Ferrara, Ferrara, Italy.,Laboratory of Technologies for Advanced Therapy (LTTA), Technopole of Ferrara, Ferrara, Italy.,Maria Cecilia Hospital, GVM Care & Research, Cotignola, Italy
| | - Carlotta Giorgi
- Department of Medical Sciences, University of Ferrara, Ferrara, Italy.,Laboratory of Technologies for Advanced Therapy (LTTA), Technopole of Ferrara, Ferrara, Italy
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21
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Barth syndrome: cardiolipin, cellular pathophysiology, management, and novel therapeutic targets. Mol Cell Biochem 2021; 476:1605-1629. [PMID: 33415565 DOI: 10.1007/s11010-020-04021-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Accepted: 12/11/2020] [Indexed: 12/15/2022]
Abstract
Barth syndrome is a rare X-linked genetic disease classically characterized by cardiomyopathy, skeletal myopathy, growth retardation, neutropenia, and 3-methylglutaconic aciduria. It is caused by mutations in the tafazzin gene localized to chromosome Xq28.12. Mutations in tafazzin may result in alterations in the level and molecular composition of the mitochondrial phospholipid cardiolipin and result in large elevations in the lysophospholipid monolysocardiolipin. The increased monolysocardiolipin:cardiolipin ratio in blood is diagnostic for the disease, and it leads to disruption in mitochondrial bioenergetics. In this review, we discuss cardiolipin structure, synthesis, and function and provide an overview of the clinical and cellular pathophysiology of Barth Syndrome. We highlight known pharmacological management for treatment of the major pathological features associated with the disease. In addition, we discuss non-pharmacological management. Finally, we highlight the most recent promising therapeutic options for this rare mitochondrial disease including lipid replacement therapy, peroxisome proliferator-activated receptor agonists, tafazzin gene replacement therapy, induced pluripotent stem cells, mitochondria-targeted antioxidants and peptides, and the polyphenolic compound resveratrol.
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22
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Emami NK, Jung U, Voy B, Dridi S. Radical Response: Effects of Heat Stress-Induced Oxidative Stress on Lipid Metabolism in the Avian Liver. Antioxidants (Basel) 2020; 10:antiox10010035. [PMID: 33396952 PMCID: PMC7823512 DOI: 10.3390/antiox10010035] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 12/25/2020] [Accepted: 12/29/2020] [Indexed: 12/13/2022] Open
Abstract
Lipid metabolism in avian species places unique demands on the liver in comparison to most mammals. The avian liver synthesizes the vast majority of fatty acids that provide energy and support cell membrane synthesis throughout the bird. Egg production intensifies demands to the liver as hepatic lipids are needed to create the yolk. The enzymatic reactions that underlie de novo lipogenesis are energetically demanding and require a precise balance of vitamins and cofactors to proceed efficiently. External stressors such as overnutrition or nutrient deficiency can disrupt this balance and compromise the liver’s ability to support metabolic needs. Heat stress is an increasingly prevalent environmental factor that impairs lipid metabolism in the avian liver. The effects of heat stress-induced oxidative stress on hepatic lipid metabolism are of particular concern in modern commercial chickens due to the threat to global poultry production. Chickens are highly vulnerable to heat stress because of their limited capacity to dissipate heat, high metabolic activity, high internal body temperature, and narrow zone of thermal tolerance. Modern lines of both broiler (meat-type) and layer (egg-type) chickens are especially sensitive to heat stress because of the high rates of mitochondrial metabolism. While this oxidative metabolism supports growth and egg production, it also yields oxidative stress that can damage mitochondria, cellular membranes and proteins, making the birds more vulnerable to other stressors in the environment. Studies to date indicate that oxidative and heat stress interact to disrupt hepatic lipid metabolism and compromise performance and well-being in both broilers and layers. The purpose of this review is to summarize the impact of heat stress-induced oxidative stress on lipid metabolism in the avian liver. Recent advances that shed light on molecular mechanisms and potential nutritional/managerial strategies to counteract the negative effects of heat stress-induced oxidative stress to the avian liver are also integrated.
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Affiliation(s)
- Nima K. Emami
- Center of Excellence for Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA;
| | - Usuk Jung
- College of Arts & Sciences, University of Tennessee, Knoxville, TN 37996, USA; (U.J.); (B.V.)
| | - Brynn Voy
- College of Arts & Sciences, University of Tennessee, Knoxville, TN 37996, USA; (U.J.); (B.V.)
| | - Sami Dridi
- Center of Excellence for Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA;
- Correspondence:
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23
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Ketogenic Diet: Impact on Cellular Lipids in Hippocampal Murine Neurons. Nutrients 2020; 12:nu12123870. [PMID: 33352829 PMCID: PMC7766526 DOI: 10.3390/nu12123870] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/13/2020] [Accepted: 12/15/2020] [Indexed: 12/13/2022] Open
Abstract
Background: The mechanism of action of the ketogenic diet (KD), an effective treatment for pharmacotherapy refractory epilepsy, is not fully elucidated. The present study examined the effects of two metabolites accumulating under KD—beta-hydroxybutyrate (ßHB) and decanoic acid (C10) in hippocampal murine (HT22) neurons. Methods: A mouse HT22 hippocampal neuronal cell line was used in the present study. Cellular lipids were analyzed in cell cultures incubated with high (standard) versus low glucose supplemented with ßHB or C10. Cellular cholesterol was analyzed using HPLC, while phospholipids and sphingomyelin (SM) were analyzed using HPTLC. Results: HT22 cells showed higher cholesterol, but lower SM levels in the low glucose group without supplements as compared to the high glucose groups. While cellular cholesterol was reduced in both ßHB- and C10-incubated cells, phospholipids were significantly higher in C10-incubated neurons. Ratios of individual phospholipids to cholesterol were significantly higher in ßHB- and C10-incubated neurons as compared to controls. Conclusion: Changes in the ratios of individual phospholipids to cholesterol in HT22 neurons suggest a possible alteration in the composition of the plasma membrane and organelle membranes, which may provide insight into the working mechanism of KD metabolites ßHB and C10.
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24
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Tu C, Xiong H, Hu Y, Wang W, Mei G, Wang H, Li Y, Zhou Z, Meng F, Zhang P, Mei Z. Cardiolipin Synthase 1 Ameliorates NASH Through Activating Transcription Factor 3 Transcriptional Inactivation. Hepatology 2020; 72:1949-1967. [PMID: 32096565 DOI: 10.1002/hep.31202] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 01/18/2020] [Accepted: 02/04/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND AIMS NASH is an increasingly prevalent disease that is the major cause of liver dysfunction. Previous research has indicated that adipose cardiolipin synthase 1 (CRLS1) levels are associated with insulin sensitivity; however, the precise roles of CRLS1 and underlying mechanisms involving CRLS1 in the pathological process of NASH have not been elucidated. APPROACH AND RESULTS Here, we discovered that CRLS1 was significantly down-regulated in genetically obese and diet-induced mice models. In vitro studies demonstrated that overexpression of CRLS1 markedly attenuated hepatic steatosis and inflammation in hepatocytes, whereas short hairpin RNA-mediated CRLS1 knockdown aggravated these abnormalities. Moreover, high-fat diet-induced insulin resistance and hepatic steatosis were significantly exacerbated in hepatocyte-specific Crls1-knockout (Crls1-HKO) mice. It is worth noting that Crls1 depletion significantly aggravated high-fat and high-cholesterol diet-induced inflammatory response and fibrosis during NASH development. RNA-sequencing analysis systematically demonstrated a prominently aggravated lipid metabolism disorder in which inflammation and fibrosis resulted from Crls1 deficiency. Mechanically, activating transcription factor 3 (ATF3) was identified as the key differentially expressed gene in Crls1-HKO mice through transcriptomic analysis, and our investigation further showed that CRLS1 suppresses ATF3 expression and inhibits its activity in palmitic acid-stimulated hepatocytes, whereas ATF3 partially reverses lipid accumulation and inflammation inhibited by CRLS1 overexpression under metabolic stress. CONCLUSIONS In conclusion, CRLS1 ameliorates insulin resistance, hepatic steatosis, inflammation, and fibrosis during the pathological process of NASH by inhibiting the expression and activity of ATF3.
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Affiliation(s)
- Chuyue Tu
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, China
| | - Hui Xiong
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, China
| | - Yufeng Hu
- Medical Science Research Center, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Wen Wang
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, China
| | - Gui Mei
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, China
| | - Hua Wang
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, China
| | - Ya Li
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, China
| | - Zelin Zhou
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, China
| | - Fengping Meng
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, China
| | - Peng Zhang
- Medical Science Research Center, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Zhinan Mei
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, China
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25
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Palavicini JP, Chen J, Wang C, Wang J, Qin C, Baeuerle E, Wang X, Woo JA, Kang DE, Musi N, Dupree JL, Han X. Early disruption of nerve mitochondrial and myelin lipid homeostasis in obesity-induced diabetes. JCI Insight 2020; 5:137286. [PMID: 33148881 PMCID: PMC7710310 DOI: 10.1172/jci.insight.137286] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 09/30/2020] [Indexed: 12/17/2022] Open
Abstract
Diabetic neuropathy is a major complication of diabetes. Current treatment options alleviate pain but do not stop the progression of the disease. At present, there are no approved disease-modifying therapies. Thus, developing more effective therapies remains a major unmet medical need. Seeking to better understand the molecular mechanisms driving peripheral neuropathy, as well as other neurological complications associated with diabetes, we performed spatiotemporal lipidomics, biochemical, ultrastructural, and physiological studies on PNS and CNS tissue from multiple diabetic preclinical models. We unraveled potentially novel molecular fingerprints underlying nerve damage in obesity-induced diabetes, including an early loss of nerve mitochondrial (cardiolipin) and myelin signature (galactosylceramide, sulfatide, and plasmalogen phosphatidylethanolamine) lipids that preceded mitochondrial, myelin, and axonal structural/functional defects; started in the PNS; and progressed to the CNS at advanced diabetic stages. Mechanistically, we provided substantial evidence indicating that these nerve mitochondrial/myelin lipid abnormalities are (surprisingly) not driven by hyperglycemia, dysinsulinemia, or insulin resistance, but rather associate with obesity/hyperlipidemia. Importantly, our findings have major clinical implications as they open the door to novel lipid-based biomarkers to diagnose and distinguish different subtypes of diabetic neuropathy (obese vs. nonobese diabetics), as well as to lipid-lowering therapeutic strategies for treatment of obesity/diabetes-associated neurological complications and for glycemic control. Spatiotemporal lipidomics, biochemical, ultrastructural, and physiological characterization of peripheral and central nervous system tissue from multiple diabetic pre-clinical models.
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Affiliation(s)
- Juan P Palavicini
- Barshop Institute for Longevity and Aging Studies and.,Division of Diabetes, Department of Medicine, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
| | - Juan Chen
- Barshop Institute for Longevity and Aging Studies and.,School of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Chunyan Wang
- Barshop Institute for Longevity and Aging Studies and
| | - Jianing Wang
- Barshop Institute for Longevity and Aging Studies and
| | - Chao Qin
- Barshop Institute for Longevity and Aging Studies and
| | - Eric Baeuerle
- Barshop Institute for Longevity and Aging Studies and
| | - Xinming Wang
- Byrd Alzheimer's Center and Research Institute, USF Health Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
| | - Jung A Woo
- Byrd Alzheimer's Center and Research Institute, USF Health Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
| | - David E Kang
- Byrd Alzheimer's Center and Research Institute, USF Health Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
| | - Nicolas Musi
- Barshop Institute for Longevity and Aging Studies and.,Division of Diabetes, Department of Medicine, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
| | - Jeffrey L Dupree
- Department of Anatomy and Neurobiology, School of Medicine, Virginia Commonwealth University, Richmond, Virginia, USA.,Research Service, Hunter Holmes McGuire Veterans Affairs Medical Center, Richmond, Virginia, USA
| | - Xianlin Han
- Barshop Institute for Longevity and Aging Studies and.,Division of Diabetes, Department of Medicine, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
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26
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Manrique-Moreno M, Suwalsky M, Patiño-González E, Fandiño-Devia E, Jemioła-Rzemińska M, Strzałka K. Interaction of the antimicrobial peptide ∆M3 with the Staphylococcus aureus membrane and molecular models. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1863:183498. [PMID: 33157098 DOI: 10.1016/j.bbamem.2020.183498] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 09/22/2020] [Accepted: 10/12/2020] [Indexed: 11/18/2022]
Abstract
Staphylococcus aureus is one of the most pathogenic bacteria; infections with it are associated with significant morbidity and mortality in health care facilities. Antimicrobial peptides are a promising next generation antibiotic with great potential against bacterial infections. In this study, evidence is presented of the biological and biophysical properties of the novel synthetic peptide ΔM3. Its antimicrobial activity against the ATCC 25923 and methicillin-resistant S. aureus strains was evaluated. The results showed that ΔM3 has activity in the same μM range as vancomycin. Biophysical studies were performed with palmitoyloleoylphosphatidylglycerol and cardiolipin liposomes loaded with calcein and used to follow the lytic activity of the peptide by fluorescence spectroscopy. On the other hand, ΔM3 was induced to interact with molecular models of the erythrocyte membrane buil-up of dimiristoylphosphatidylcholine and dimyristoylphosphatidylethanolamine, representative lipids of the outer and inner monolayers of the human erythrocyte membrane, respectively. The capacity of ΔM3 to interact with the bacteria and erythrocyte model membranes was also evaluated by X-ray diffraction and differential scanning calorimetry. The morphological changes induced by the peptide to human erythrocytes were observed by scanning electron microscopy. Results with these techniques indicated that ΔM3 interacted with the inner monolayer of the erythrocyte membrane, which is rich in anionic lipids. Additionally, the cytotoxic effects of ΔM3 on red blood cells were evaluated by monitoring the hemoglobin release from erythrocytes. The results obtained from these different approaches showed ΔM3 to be a non-cytotoxic peptide with antibacterial activity.
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Affiliation(s)
| | - Mario Suwalsky
- Facultad de Medicina, Universidad Católica de la Santísima Concepción, Concepción, Chile
| | | | | | - Małgorzata Jemioła-Rzemińska
- Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland; Malopolska Centre of Biotechnology, JagiellonianUniversity, Krakow, Poland
| | - Kazimierz Strzałka
- Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland; Malopolska Centre of Biotechnology, JagiellonianUniversity, Krakow, Poland
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27
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Le CH, Benage LG, Specht KS, Li Puma LC, Mulligan CM, Heuberger AL, Prenni JE, Claypool SM, Chatfield KC, Sparagna GC, Chicco AJ. Tafazzin deficiency impairs CoA-dependent oxidative metabolism in cardiac mitochondria. J Biol Chem 2020; 295:12485-12497. [PMID: 32665401 DOI: 10.1074/jbc.ra119.011229] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 07/07/2020] [Indexed: 12/20/2022] Open
Abstract
Barth syndrome is a mitochondrial myopathy resulting from mutations in the tafazzin (TAZ) gene encoding a phospholipid transacylase required for cardiolipin remodeling. Cardiolipin is a phospholipid of the inner mitochondrial membrane essential for the function of numerous mitochondrial proteins and processes. However, it is unclear how tafazzin deficiency impacts cardiac mitochondrial metabolism. To address this question while avoiding confounding effects of cardiomyopathy on mitochondrial phenotype, we utilized Taz-shRNA knockdown (TazKD ) mice, which exhibit defective cardiolipin remodeling and respiratory supercomplex instability characteristic of human Barth syndrome but normal cardiac function into adulthood. Consistent with previous reports from other models, mitochondrial H2O2 emission and oxidative damage were greater in TazKD than in wild-type (WT) hearts, but there were no differences in oxidative phosphorylation coupling efficiency or membrane potential. Fatty acid and pyruvate oxidation capacities were 40-60% lower in TazKD mitochondria, but an up-regulation of glutamate oxidation supported respiration rates approximating those with pyruvate and palmitoylcarnitine in WT. Deficiencies in mitochondrial CoA and shifts in the cardiac acyl-CoA profile paralleled changes in fatty acid oxidation enzymes and acyl-CoA thioesterases, suggesting limitations of CoA availability or "trapping" in TazKD mitochondrial metabolism. Incubation of TazKD mitochondria with exogenous CoA partially rescued pyruvate and palmitoylcarnitine oxidation capacities, implicating dysregulation of CoA-dependent intermediary metabolism rather than respiratory chain defects in the bioenergetic impacts of tafazzin deficiency. These findings support links among cardiolipin abnormalities, respiratory supercomplex instability, and mitochondrial oxidant production and shed new light on the distinct metabolic consequences of tafazzin deficiency in the mammalian heart.
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Affiliation(s)
- Catherine H Le
- Cell and Molecular Biology Program, Colorado State University, Fort Collins, Colorado, USA
| | - Lindsay G Benage
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, Colorado, USA
| | - Kalyn S Specht
- Department of Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
| | - Lance C Li Puma
- Department of Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
| | - Christopher M Mulligan
- Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, Colorado, USA
| | - Adam L Heuberger
- Department of Horticulture and Landscape Architecture, Colorado State University, Fort Collins, Colorado, USA
| | - Jessica E Prenni
- Department of Horticulture and Landscape Architecture, Colorado State University, Fort Collins, Colorado, USA
| | - Steven M Claypool
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Kathryn C Chatfield
- Department of Pediatrics, University of Colorado School of Medicine, Children's Hospital Colorado, Aurora, Colorado, USA
| | - Genevieve C Sparagna
- Division of Cardiology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Adam J Chicco
- Cell and Molecular Biology Program, Colorado State University, Fort Collins, Colorado, USA .,Department of Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA.,Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, Colorado, USA
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28
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Bundgaard A, James AM, Harbour ME, Murphy MP, Fago A. Stable mitochondrial CICIII 2 supercomplex interactions in reptiles versus homeothermic vertebrates. J Exp Biol 2020; 223:jeb223776. [PMID: 32393546 PMCID: PMC7328143 DOI: 10.1242/jeb.223776] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 05/05/2020] [Indexed: 12/20/2022]
Abstract
The association of complex I (CI), complex III (CIII) and complex IV (CIV) of the mitochondrial electron transport chain into stable high molecular weight supercomplexes (SCs) has been observed in several prokaryotes and eukaryotes, but among vertebrates it has only been examined in mammals. The biological role of these SCs is unclear but suggestions so far include enhanced electron transfer between complexes, decreased production of the reactive oxygen species (ROS) O2- and H2O2, or enhanced structural stability. Here, we provide the first overview on the stability, composition and activity of mitochondrial SCs in representative species of several vertebrate classes to determine patterns of SC variation across endotherms and ectotherms. We found that the stability of the CICIII2 SC and the inclusion of CIV within the SC varied considerably. Specifically, when solubilized by the detergent DDM, mitochondrial CICIII2 SCs were unstable in endotherms (birds and mammals) and highly stable in reptiles. Using mass-spectrometric complexomics, we confirmed that the CICIII2 is the major SC in the turtle, and that 90% of CI is found in this highly stable SC. Interestingly, the presence of stable SCs did not prevent mitochondrial H2O2 production and was not associated with elevated respiration rates of mitochondria isolated from the examined species. Together, these data show that SC stability varies among vertebrates and is greatest in poikilothermic reptiles and weakest in endotherms. This pattern suggests an adaptive role of SCs to varying body temperature, but not necessarily a direct effect on electron transfer or in the prevention of ROS production.
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Affiliation(s)
| | - Andrew M James
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge CB2 0XY, UK
| | - Michael E Harbour
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge CB2 0XY, UK
| | - Michael P Murphy
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge CB2 0XY, UK
| | - Angela Fago
- Department of Biology, Aarhus University, 8000 Aarhus, Denmark
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29
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Miranda ÉGA, Araujo-Chaves JC, Kawai C, Brito AMM, Dias IWR, Arantes JT, Nantes-Cardoso IL. Cardiolipin Structure and Oxidation Are Affected by Ca 2+ at the Interface of Lipid Bilayers. Front Chem 2020; 7:930. [PMID: 32039150 PMCID: PMC6986261 DOI: 10.3389/fchem.2019.00930] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 12/20/2019] [Indexed: 12/13/2022] Open
Abstract
Ca2+-overload contributes to the oxidation of mitochondrial membrane lipids and associated events such as the permeability transition pore (MPTP) opening. Numerous experimental studies about the Ca2+/cardiolipin (CL) interaction are reported in the literature, but there are few studies in conjunction with theoretical approaches based on ab initio calculations. In the present study, the lipid fraction of the inner mitochondrial membrane was modeled as POPC/CL large unilamellar vesicles (LUVs). POPC/CL and, comparatively, POPC, and CL LUVs were challenged by singlet molecular oxygen using the anionic porphyrin TPPS4 as a photosensitizer and by free radicals produced by Fe2+-citrate. Calcium ion favored both types of lipid oxidation in a lipid composition-dependent manner. In membranes containing predominantly or exclusively POPC, Ca2+ increased the oxidation at later reaction times while the oxidation of CL membranes was exacerbated at the early times of reaction. Considering that Ca2+ interaction affects the lipid structure and packing, density functional theory (DFT) calculations were applied to the Ca2+ association with totally and partially protonated and deprotonated CL, in the presence of water. The interaction of totally and partially protonated CL head groups with Ca2+ decreased the intramolecular P-P distance and increased the hydrophobic volume of the acyl chains. Consistently with the theoretically predicted effect of Ca2+ on CL, in the absence of pro-oxidants, giant unilamellar vesicles (GUVs) challenged by Ca2+ formed buds and many internal vesicles. Therefore, Ca2+ induces changes in CL packing and increases the susceptibility of CL to the oxidation promoted by free radicals and excited species.
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Affiliation(s)
- Érica G A Miranda
- Laboratory of Nanostructures for Biology and Advanced Materials, NanoBioMAv, Center of Natural Sciences and Humanities, Federal University of ABC, Santo André, Brazil
| | - Juliana C Araujo-Chaves
- Laboratory of Nanostructures for Biology and Advanced Materials, NanoBioMAv, Center of Natural Sciences and Humanities, Federal University of ABC, Santo André, Brazil
| | - Cintia Kawai
- Laboratory of Nanostructures for Biology and Advanced Materials, NanoBioMAv, Center of Natural Sciences and Humanities, Federal University of ABC, Santo André, Brazil
| | - Adrianne M M Brito
- Laboratory of Nanostructures for Biology and Advanced Materials, NanoBioMAv, Center of Natural Sciences and Humanities, Federal University of ABC, Santo André, Brazil
| | - Igor W R Dias
- Center of Engineering, Modeling, and Applied Social Sciences, Federal University of ABC, Santo André, Brazil
| | - Jeverson T Arantes
- Center of Engineering, Modeling, and Applied Social Sciences, Federal University of ABC, Santo André, Brazil
| | - Iseli L Nantes-Cardoso
- Laboratory of Nanostructures for Biology and Advanced Materials, NanoBioMAv, Center of Natural Sciences and Humanities, Federal University of ABC, Santo André, Brazil
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30
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Sacchetto C, Sequeira V, Bertero E, Dudek J, Maack C, Calore M. Metabolic Alterations in Inherited Cardiomyopathies. J Clin Med 2019; 8:jcm8122195. [PMID: 31842377 PMCID: PMC6947282 DOI: 10.3390/jcm8122195] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 12/06/2019] [Accepted: 12/09/2019] [Indexed: 12/12/2022] Open
Abstract
The normal function of the heart relies on a series of complex metabolic processes orchestrating the proper generation and use of energy. In this context, mitochondria serve a crucial role as a platform for energy transduction by supplying ATP to the varying demand of cardiomyocytes, involving an intricate network of pathways regulating the metabolic flux of substrates. The failure of these processes results in structural and functional deficiencies of the cardiac muscle, including inherited cardiomyopathies. These genetic diseases are characterized by cardiac structural and functional anomalies in the absence of abnormal conditions that can explain the observed myocardial abnormality, and are frequently associated with heart failure. Since their original description, major advances have been achieved in the genetic and phenotype knowledge, highlighting the involvement of metabolic abnormalities in their pathogenesis. This review provides a brief overview of the role of mitochondria in the energy metabolism in the heart and focuses on metabolic abnormalities, mitochondrial dysfunction, and storage diseases associated with inherited cardiomyopathies.
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Affiliation(s)
- Claudia Sacchetto
- IMAiA—Institute for Molecular Biology and RNA Technology, Faculty of Health, Universiteitssingel 50, 6229ER Maastricht, The Netherlands;
- Medicine and Life Sciences, Faculty of Science and Engineering, Universiteitssingel 50, 6229ER Maastricht, The Netherlands
- Department of Biology, University of Padova, via Ugo Bassi 58B, 35121 Padova, Italy
| | - Vasco Sequeira
- Department of Translational Science, Comprehensive Heart Failure Center, University Clinic Würzburg, Am Schwarzenberg 15, 9708 Würzburg, Germany; (V.S.); (E.B.); (J.D.)
| | - Edoardo Bertero
- Department of Translational Science, Comprehensive Heart Failure Center, University Clinic Würzburg, Am Schwarzenberg 15, 9708 Würzburg, Germany; (V.S.); (E.B.); (J.D.)
| | - Jan Dudek
- Department of Translational Science, Comprehensive Heart Failure Center, University Clinic Würzburg, Am Schwarzenberg 15, 9708 Würzburg, Germany; (V.S.); (E.B.); (J.D.)
| | - Christoph Maack
- Department of Translational Science, Comprehensive Heart Failure Center, University Clinic Würzburg, Am Schwarzenberg 15, 9708 Würzburg, Germany; (V.S.); (E.B.); (J.D.)
- Correspondence: (C.M.); (M.C.)
| | - Martina Calore
- IMAiA—Institute for Molecular Biology and RNA Technology, Faculty of Health, Universiteitssingel 50, 6229ER Maastricht, The Netherlands;
- Medicine and Life Sciences, Faculty of Science and Engineering, Universiteitssingel 50, 6229ER Maastricht, The Netherlands
- Correspondence: (C.M.); (M.C.)
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31
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Zhou H, Zhu P, Wang J, Toan S, Ren J. DNA-PKcs promotes alcohol-related liver disease by activating Drp1-related mitochondrial fission and repressing FUNDC1-required mitophagy. Signal Transduct Target Ther 2019; 4:56. [PMID: 31839999 PMCID: PMC6895206 DOI: 10.1038/s41392-019-0094-1] [Citation(s) in RCA: 117] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 09/19/2019] [Accepted: 11/03/2019] [Indexed: 12/13/2022] Open
Abstract
DNA-dependent protein kinase catalytic subunit (DNA-PKcs) is a novel housekeeper of hepatic mitochondrial homeostasis outside the DNA repair process. In this study, DNA-PKcs was upregulated in the livers of mice that were exposed to alcohol; the expression of DNA-PKcs positively correlated with hepatic steatosis, fibrosis, apoptosis, and mitochondrial damage. Functional studies revealed that liver-specific DNA-PKcs knockout (DNA-PKcs LKO ) mice were protected from chronic ethanol-induced liver injury and mitochondrial damage. Mechanistic investigations established that DNA-PKcs promoted p53 activation, which elevated dynamin-related protein 1 (Drp1)-related mitochondrial fission but repressed FUN14 domain containing 1 (FUNDC1)-required mitophagy. Excessive fission and defective mitophagy triggered mtDNA damage, mitochondrial respiratory inhibition, mROS overproduction, cardiolipin oxidation, redox imbalance, calcium overload, and hepatic mitochondrial apoptosis. In contrast, the deletion of DNA-PKcs rescued these phenotypic alterations, which alleviated the susceptibility of hepatocytes to alcohol-induced cytotoxicity. Additionally, we also showed that orphan nuclear receptor subfamily 4 group A member 1 (NR4A1) was the upstream signal for DNA-PKcs activation and that the genetic ablation of NR4A1 ameliorated the progression of alcohol-related liver disease (ARLD); these results were similar to those obtained in DNA-PKcs knockout mice. Collectively, our results identified the NR4A1/DNA-PKcs/p53 axis as a novel signaling pathway responsible for ARLD pathogenesis that acts by activating Drp1-related mitochondrial fission and restricting FUNDC1-required mitophagy. The findings have potential implications for new approaches for ARLD therapy.
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Affiliation(s)
- Hao Zhou
- Chinese PLA General Hospital, Medical School of Chinese PLA, 100853 Beijing, China
- Center for Cardiovascular Research and Alternative Medicine, University of Wyoming College of Health Sciences, Laramie, WY 82071 USA
| | - Pingjun Zhu
- Chinese PLA General Hospital, Medical School of Chinese PLA, 100853 Beijing, China
| | - Jin Wang
- Chinese PLA General Hospital, Medical School of Chinese PLA, 100853 Beijing, China
| | - Sam Toan
- Department of Chemical Engineering, University of Minnesota-Duluth, Duluth, MN 55812 USA
| | - Jun Ren
- Center for Cardiovascular Research and Alternative Medicine, University of Wyoming College of Health Sciences, Laramie, WY 82071 USA
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Bottje WG. BOARD INVITED REVIEW: Oxidative stress and efficiency: the tightrope act of mitochondria in health and disease1,2. J Anim Sci 2019; 97:3169-3179. [PMID: 31247079 DOI: 10.1093/jas/skz219] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Accepted: 06/26/2019] [Indexed: 02/06/2023] Open
Abstract
Oxidative stress is an unavoidable consequence of aerobic metabolism. Whereas high amounts of mitochondrial reactive oxygen species (ROS) can cause oxidation, low levels play important roles in signal transduction. In a Pedigree male (PedM) broiler model of feed efficiency (FE), the low FE phenotype was characterized by increased ROS in isolated mitochondria (muscle, liver, and duodenum) with a pervasive protein oxidation in mitochondria and tissues. Subsequent proteogenomic studies in muscle revealed evidence of enhanced mitoproteome abundance, enhanced mitochondrial phosphocreatine shuttling expression, and enhanced ribosome assembly in the high FE phenotype. Surprisingly, an enhanced infrastructure would foster greater repair of damaged proteins or organelles through the autophagy and proteosome pathways in the high FE phenotype. Although protein and organelle degradation, recycling, and reconstruction would be energetically expensive, it is possible that energy invested into maintaining optimal function of proteins and organelles contributes to cellular efficiency in the high FE phenotype. New findings in mitochondrial physiology have been reported in the last several years. Reverse electron transport (RET), once considered an artifact of in vitro conditions, now is recognized to play significant roles in inflammation, ischemia-reperfusion, muscle differentiation, and energy utilization. A topology of ROS production indicates that ROS derived from Complex I of the respiratory chain primarily causes oxidation, whereas ROS generated from Complex III are primarily involved in cell signaling. It is also apparent that there is a constant fission and fusion process that mitochondria undergo that help maintain optimal mitochondrial function and enables mitochondria to adjust to periods of nutrient limitation and nutrient excess. Understanding the balancing act that mitochondria play in health and disease will continue to be a vital biological component in health-production efficiency and disease in commercial animal agriculture.
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Affiliation(s)
- Walter G Bottje
- Department of Poultry Science, Center of Excellence for Poultry Science, University of Arkansas, Fayetteville, AR
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33
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Tsubone TM, Baptista MS, Itri R. Understanding membrane remodelling initiated by photosensitized lipid oxidation. Biophys Chem 2019; 254:106263. [DOI: 10.1016/j.bpc.2019.106263] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 08/13/2019] [Accepted: 09/03/2019] [Indexed: 12/19/2022]
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34
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Bottje W. Oxidative metabolism and efficiency: the delicate balancing act of mitochondria. Poult Sci 2019; 98:4223-4230. [DOI: 10.3382/ps/pey405] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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35
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He P, Hou B, Li Y, Xu C, Ma P, Lam SM, Gil V, Yang X, Yang X, Zhang L, Shui G, Song J, Qiang G, Liew CW, Du G. Lipid Profiling Reveals Browning Heterogeneity of White Adipose Tissue by Β3-Adrenergic Stimulation. Biomolecules 2019; 9:biom9090444. [PMID: 31484405 PMCID: PMC6770315 DOI: 10.3390/biom9090444] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 08/27/2019] [Accepted: 08/29/2019] [Indexed: 12/14/2022] Open
Abstract
Background: White adipose tissue (WAT) browning confers beneficial effects on metabolic diseases. However, visceral adipose tissue (VAT) is not as susceptible to browning as subcutaneous adipose tissue (SAT). Aim: Interpreting the heterogeneity of VAT and SAT in brown remodeling and provide promising lipid targets to promote WAT browning. Methods: We first investigated the effects of β3-adrenergic stimulation by CL316,243 on systemic metabolism. Then, high-coverage targeted lipidomics approach with multiple reaction monitoring (MRM) was utilized to provide extensive detection of lipid metabolites in VAT and SAT. Results: CL316,243 notably ameliorated the systemic metabolism and induced brown remodeling of SAT but browning resistance of VAT. Comprehensive lipidomics analysis revealed browning heterogeneity of VAT and SAT with more dramatic alteration of lipid classes and species in VAT rather than SAT, though VAT is resistant to browning. Adrenergic stimulation differentially affected glycerides content in VAT and SAT and boosted the abundance of more glycerophospholipids species in VAT than in SAT. Besides, CL316,243 increased sphingolipids in VAT without changes in SAT, meanwhile, elevated cardiolipin species more prominently in VAT than in SAT. Conclusions: We demonstrated the browning heterogeneity of WAT and identified potential lipid biomarkers which may provide lipid targets for overcoming VAT browning resistance.
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Affiliation(s)
- Ping He
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College and Beijing Key Laboratory of Drug Target and Screening Research, Beijing 100050, China
| | - Biyu Hou
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College and Beijing Key Laboratory of Drug Target and Screening Research, Beijing 100050, China
| | - Yanliang Li
- Department of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Chunyang Xu
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College and Beijing Key Laboratory of Drug Target and Screening Research, Beijing 100050, China
| | - Peng Ma
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College and Beijing Key Laboratory of Drug Target and Screening Research, Beijing 100050, China
| | - Sin Man Lam
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Victoria Gil
- Department of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Xinyu Yang
- College of Pharmacy, Guangdong Medical University, Dongguan 523808, China
| | - Xiuying Yang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College and Beijing Key Laboratory of Drug Target and Screening Research, Beijing 100050, China
| | - Li Zhang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College and Beijing Key Laboratory of Drug Target and Screening Research, Beijing 100050, China
| | - Guanghou Shui
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Junke Song
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College and Beijing Key Laboratory of Drug Target and Screening Research, Beijing 100050, China
| | - Guifen Qiang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College and Beijing Key Laboratory of Drug Target and Screening Research, Beijing 100050, China.
| | - Chong Wee Liew
- Department of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA.
| | - Guanhua Du
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College and Beijing Key Laboratory of Drug Target and Screening Research, Beijing 100050, China.
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36
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Wilson BA, Ramanathan A, Lopez CF. Cardiolipin-Dependent Properties of Model Mitochondrial Membranes from Molecular Simulations. Biophys J 2019; 117:429-444. [PMID: 31349988 PMCID: PMC6697365 DOI: 10.1016/j.bpj.2019.06.023] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 06/17/2019] [Accepted: 06/24/2019] [Indexed: 01/30/2023] Open
Abstract
Cardiolipin is an anionic lipid found in the mitochondrial membranes of eukaryotes ranging from unicellular microorganisms to metazoans. This unique lipid contributes to various mitochondrial functions, including metabolism, mitochondrial membrane fusion and/or fission dynamics, and apoptosis. However, differences in cardiolipin content between the two mitochondrial membranes, as well as dynamic fluctuations in cardiolipin content in response to stimuli and cellular signaling events, raise questions about how cardiolipin concentration affects mitochondrial membrane structure and dynamics. Although cardiolipin’s structural and dynamic roles have been extensively studied in binary mixtures with other phospholipids, the biophysical properties of cardiolipin in higher number lipid mixtures are still not well resolved. Here, we used molecular dynamics simulations to investigate the cardiolipin-dependent properties of ternary lipid bilayer systems that mimic the major components of mitochondrial membranes. We found that changes to cardiolipin concentration only resulted in minor changes to bilayer structural features but that the lipid diffusion was significantly affected by those alterations. We also found that cardiolipin position along the bilayer surfaces correlated to negative curvature deflections, consistent with the induction of negative curvature stress in the membrane monolayers. This work contributes to a foundational understanding of the role of cardiolipin in altering the properties in ternary lipid mixtures composed of the major mitochondrial phospholipids, providing much-needed insights to help understand how cardiolipin concentration modulates the biophysical properties of mitochondrial membranes.
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Affiliation(s)
- Blake A Wilson
- Department of Biochemistry, Vanderbilt University, Nashville, Tennessee
| | - Arvind Ramanathan
- Computational Science and Engineering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee; Health Data Sciences Institute, Oak Ridge National Laboratory, Oak Ridge, Tennessee
| | - Carlos F Lopez
- Department of Biochemistry, Vanderbilt University, Nashville, Tennessee; Department of Biomedical Informatics, Vanderbilt University Medical Center, Nashville, Tennessee; Department of Pharmacology, Vanderbilt University, Nashville, Tennessee.
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37
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Andreev K, Martynowycz MW, Gidalevitz D. Peptoid drug discovery and optimization via surface X-ray scattering. Biopolymers 2019; 110:e23274. [PMID: 30892696 PMCID: PMC6661014 DOI: 10.1002/bip.23274] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 03/01/2019] [Accepted: 03/04/2019] [Indexed: 12/31/2022]
Abstract
Synthetic polymers mimicking antimicrobial peptides have drawn considerable interest as potential therapeutics. N-substituted glycines, or peptoids, are recognized by their in vivo stability and ease of synthesis. Peptoids are thought to act primarily on the negatively charged lipids that are abundant in bacterial cell membranes. A mechanistic understanding of lipid-peptoid interaction at the molecular level will provide insights for rational design and optimization of peptoids. Here, we highlight recent studies that utilize synchrotron liquid surface X-ray scattering to characterize the underlying peptoid interactions with bacterial and eukaryotic membranes. Cellular membranes are highly complex, and difficult to characterize at the molecular level. Model systems including Langmuir monolayers, are used in these studies to reduce system complexity. The general workflow of these systems and the corresponding data analysis techniques are presented alongside recent findings. These studies investigate the role of peptoid physicochemical characteristics on membrane activity. Specifically, the roles of cationic charge, conformational constraint via macrocyclization, and hydrophobicity are shown to correlate their membrane interactions to biological activities in vitro. These structure-activity relationships have led to new insights into the mechanism of action by peptoid antimicrobials, and suggest optimization strategies for future therapeutics based on peptoids.
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Affiliation(s)
- Konstantin Andreev
- Howard Hughes Medical Institute, Northwestern University, Evanston, Illinois
| | | | - David Gidalevitz
- Center for the Molecular Study of Condensed Soft Matter and Department of Physics, Illinois Institute of Technology, Chicago, Illinois
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38
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Konjar Š, Frising UC, Ferreira C, Hinterleitner R, Mayassi T, Zhang Q, Blankenhaus B, Haberman N, Loo Y, Guedes J, Baptista M, Innocentin S, Stange J, Strathdee D, Jabri B, Veldhoen M. Mitochondria maintain controlled activation state of epithelial-resident T lymphocytes. Sci Immunol 2019; 3:3/24/eaan2543. [PMID: 29934344 DOI: 10.1126/sciimmunol.aan2543] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 10/19/2017] [Accepted: 04/24/2018] [Indexed: 12/15/2022]
Abstract
Epithelial-resident T lymphocytes, such as intraepithelial lymphocytes (IELs) located at the intestinal barrier, can offer swift protection against invading pathogens. Lymphocyte activation is strictly regulated because of its potential harmful nature and metabolic cost, and most lymphocytes are maintained in a quiescent state. However, IELs are kept in a heightened state of activation resembling effector T cells but without cytokine production or clonal proliferation. We show that this controlled activation state correlates with alterations in the IEL mitochondrial membrane, especially the cardiolipin composition. Upon inflammation, the cardiolipin composition is altered to support IEL proliferation and effector function. Furthermore, we show that cardiolipin makeup can particularly restrict swift IEL proliferation and effector functions, reducing microbial containment capability. These findings uncover an alternative mechanism to control cellular activity, special to epithelial-resident T cells, and a novel role for mitochondria, maintaining cells in a metabolically poised state while enabling rapid progression to full functionality.
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Affiliation(s)
- Špela Konjar
- Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Avenida Professor Egas Moniz, Lisbon, 1649-028, Portugal.,Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, UK
| | - Ulrika C Frising
- Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, UK
| | - Cristina Ferreira
- Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Avenida Professor Egas Moniz, Lisbon, 1649-028, Portugal.,Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, UK
| | - Reinhard Hinterleitner
- Department of Medicine, University of Chicago, 900 East 57th Street, MB#9, Chicago, IL 60637, USA.,Committee on Immunology, University of Chicago, Chicago, IL 60637, USA
| | - Toufic Mayassi
- Department of Medicine, University of Chicago, 900 East 57th Street, MB#9, Chicago, IL 60637, USA.,Committee on Immunology, University of Chicago, Chicago, IL 60637, USA
| | - Qifeng Zhang
- Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, UK
| | - Birte Blankenhaus
- Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Avenida Professor Egas Moniz, Lisbon, 1649-028, Portugal
| | - Nejc Haberman
- Department of Molecular Neuroscience, University College London Institute of Neurology, Queen Square, London WC1N 3BG, UK
| | - Yunhua Loo
- Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, UK
| | - Joana Guedes
- Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, UK
| | - Marta Baptista
- Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Avenida Professor Egas Moniz, Lisbon, 1649-028, Portugal
| | - Silvia Innocentin
- Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, UK
| | - Joerg Stange
- Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, UK
| | - Douglas Strathdee
- Beatson Institute for Cancer Research, Garscube Estate, Glasgow G61 1BD, Scotland
| | - Bana Jabri
- Department of Medicine, University of Chicago, 900 East 57th Street, MB#9, Chicago, IL 60637, USA.,Committee on Immunology, University of Chicago, Chicago, IL 60637, USA
| | - Marc Veldhoen
- Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Avenida Professor Egas Moniz, Lisbon, 1649-028, Portugal. .,Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, UK
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39
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The role of cardiolipin concentration and acyl chain composition on mitochondrial inner membrane molecular organization and function. Biochim Biophys Acta Mol Cell Biol Lipids 2019; 1864:1039-1052. [PMID: 30951877 DOI: 10.1016/j.bbalip.2019.03.012] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 03/19/2019] [Accepted: 03/30/2019] [Indexed: 12/28/2022]
Abstract
Cardiolipin (CL) is a key phospholipid of the mitochondria. A loss of CL content and remodeling of CL's acyl chains is observed in several pathologies. Strong shifts in CL concentration and acyl chain composition would presumably disrupt mitochondrial inner membrane biophysical organization. However, it remains unclear in the literature as to which is the key regulator of mitochondrial membrane biophysical properties. We review the literature to discriminate the effects of CL concentration and acyl chain composition on mitochondrial membrane organization. A widely applicable theme emerges across several pathologies, including cardiovascular diseases, diabetes, Barth syndrome, and neurodegenerative ailments. The loss of CL, often accompanied by increased levels of lyso-CLs, impairs mitochondrial inner membrane organization. Modest remodeling of CL acyl chains is not a major driver of impairments and only in cases of extreme remodeling is there an influence on membrane properties.
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40
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Copper and iron overload protect Escherichia coli from exogenous H2O2 by modulating membrane phospholipid composition. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/s42398-019-00046-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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41
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The relevance of the supramolecular arrangements of the respiratory chain complexes in human diseases and aging. Mitochondrion 2019; 47:266-272. [PMID: 30664953 DOI: 10.1016/j.mito.2019.01.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 07/16/2018] [Accepted: 01/03/2019] [Indexed: 01/12/2023]
Abstract
Mitochondrial dysfunction, a common factor in several diseases is accompanied with reactive oxygen species (ROS) production. These molecules react with proteins and lipids at their site of generation, establishing a vicious cycle which might result in further mitochondrial injury. It is well established that mitochondrial respiratory complexes can be organized into supramolecular structures called supercomplexes (SCs) or respirasomes; yet, the physiological/pathological relevance of these structures remains unresolved. Changes in their stabilization and content have been documented in Barth's syndrome, degenerative diseases such as Parkinson's and Alzheimer, cardiovascular diseases including heart failure and ischemia-reperfusion damage, as well as in aging. Under pathological conditions, SCs stability could have relevant biomedical implications or might be used as a reliable marker of mitochondrial damage. The purpose of this review is to recapitulate the current state of the significance on mitochondrial bioenergetics of these structures and their possible role in pathophysiologies related with ROS increase.
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42
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Gao F, McDaniel J, Chen EY, Rockwell HE, Nguyen C, Lynes MD, Tseng YH, Sarangarajan R, Narain NR, Kiebish MA. Adapted MS/MS ALL Shotgun Lipidomics Approach for Analysis of Cardiolipin Molecular Species. Lipids 2019; 53:133-142. [PMID: 29488636 DOI: 10.1002/lipd.12004] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 10/03/2017] [Accepted: 10/11/2017] [Indexed: 01/19/2023]
Abstract
Cardiolipin (Ptd2 Gro) is a complex, doubly charged phospholipid located in the inner mitochondrial membrane where it plays an essential role in regulating bioenergetics. Abnormalities in Ptd2 Gro content or composition have been associated with mitochondrial dysfunction in a variety of disease states. Here, we report the development of an adapted high-resolution data-independent acquisition (DIA) MS/MSALL shotgun lipidomic method to enhance the accuracy and reproducibility of Ptd2 Gro molecular species quantitation from biological samples. Utilizing the doubly charged molecular ions and the isotopic pattern with negative mode electrospray ionization mass spectrometry (ESI-MS) using an adapted MS/MSALL approach, we profiled more than 150 individual Ptd2 Gro species, including monolysocardiolipin (MLPtd2 Gro). The method described in this study demonstrated high reproducibility, sensitivity, and throughput with a wide dynamic range. This high-resolution MS/MSALL shotgun lipidomics approach could be extended to screening aberrations of Ptd2 Gro metabolism involved in mitochondrial dysfunction in various pathological conditions and diseases.
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Affiliation(s)
- Fei Gao
- BERG, LLC, 500 Old Connecticut Path, Bldg B, 3rd Floor, Framingham, MA 01701, USA
| | - Justice McDaniel
- BERG, LLC, 500 Old Connecticut Path, Bldg B, 3rd Floor, Framingham, MA 01701, USA
| | - Emily Y Chen
- BERG, LLC, 500 Old Connecticut Path, Bldg B, 3rd Floor, Framingham, MA 01701, USA
| | - Hannah E Rockwell
- BERG, LLC, 500 Old Connecticut Path, Bldg B, 3rd Floor, Framingham, MA 01701, USA
| | - Cindy Nguyen
- BERG, LLC, 500 Old Connecticut Path, Bldg B, 3rd Floor, Framingham, MA 01701, USA
| | - Matthew D Lynes
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA
| | - Yu-Hua Tseng
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA
- Harvard Stem Cell Institute, Harvard University, Cambridge, MA 02138, USA
| | | | - Niven R Narain
- BERG, LLC, 500 Old Connecticut Path, Bldg B, 3rd Floor, Framingham, MA 01701, USA
| | - Michael A Kiebish
- BERG, LLC, 500 Old Connecticut Path, Bldg B, 3rd Floor, Framingham, MA 01701, USA
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43
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Motlagh Scholle L, Thaele A, Beckers M, Meinhardt B, Zierz S. Lack of activation of the S113L variant of carnitine palmitoyltransfersase II by cardiolipin. J Bioenerg Biomembr 2019; 50:461-466. [PMID: 30604089 DOI: 10.1007/s10863-018-9781-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 11/27/2018] [Indexed: 11/24/2022]
Abstract
The phospholipid environment of the mitochondrial inner membrane, which contains large amounts of cardiolipin, could play a key role in transport of the long chain fatty acids. In the present study, the pre-incubation of cardiolipin with the wild type carnitine palmitoyltransferase (CPT) II led to a more than 1.5-fold increase of enzyme activity at physiological temperatures. At higher temperatures, however, there was a pronounced loss of activity. The most frequent variant S113L showed even at 37 °C a great activity loss. Pre-incubation of the wild type with both malonyl-CoA and cardiolipin counteracted the positive effect of cardiolipin. Malonyl-CoA, however, showed no inhibition effect on the variant in presence of cardiolipin. The activity loss in presence of cardiolipin at fever simulating situations was more pronounced for the variant comparing to the wild type. The reason might be a disturbed membrane association or a blockage of the active center of the mutated enzyme.
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Affiliation(s)
- Leila Motlagh Scholle
- Department of Neurology, Martin Luther University Halle-Wittenberg, Ernst-Grube-Strasse 40, 06120, Halle (Saale), Germany.
| | - Annemarie Thaele
- Department of Neurology, Martin Luther University Halle-Wittenberg, Ernst-Grube-Strasse 40, 06120, Halle (Saale), Germany
| | - Marie Beckers
- Department of Neurology, Martin Luther University Halle-Wittenberg, Ernst-Grube-Strasse 40, 06120, Halle (Saale), Germany
| | - Beate Meinhardt
- Department of Neurology, Martin Luther University Halle-Wittenberg, Ernst-Grube-Strasse 40, 06120, Halle (Saale), Germany
| | - Stephan Zierz
- Department of Neurology, Martin Luther University Halle-Wittenberg, Ernst-Grube-Strasse 40, 06120, Halle (Saale), Germany
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44
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Seifi K, Rezaei M, Yansari AT, Riazi GH, Zamiri MJ, Heidari R. Saturated fatty acids may ameliorate environmental heat stress in broiler birds by affecting mitochondrial energetics and related genes. J Therm Biol 2018; 78:1-9. [PMID: 30509623 DOI: 10.1016/j.jtherbio.2018.08.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Revised: 08/17/2018] [Accepted: 08/24/2018] [Indexed: 10/28/2022]
Abstract
Heat stress decreases performance of poultry. The novel strategies to maintain production level, or at least minimizing the decrease in productivity during hot days need to be elucidated. This study was conducted to determine the effect of four fat types on mitochondrial energetics in heat-stressed broilers. In experiment 1, nitrogen-corrected apparent metabolizable energy (AMEn) content of four supplemental fat sources, including olive oil, soybean oil, coconut oil and beef tallow, all supplemented at 3%, 6%, and 9% in the basal diet, was evaluated. The AMEn values of fats were determined as 9738.0 ± 137.9, 8949.0 ± 159.9, 7844.0 ± 91.7, and 7368.0 ± 190.3 kcal/kg for olive oil, soybean oil, coconut oil and beef tallow, respectively. In experiment 2, birds were kept in two separated rooms under 24 °C or 36 °C from 32 to 42 d of age. Each room consisted of four experimental groups. Birds in the experimental groups were fed on beef tallow-, coconut oil-, olive oil- or soybean oil-supplemented diets (factorial arrangement with two factors of fat types and environmental temperatures). The birds reared under 24 °C had higher final body weight (P < 0.01), weight gain (P < 0.01), feed intake (P < 0.05) and lower feed conversion ratio (P < 0.01) than the birds grown under 36 °C. There was a temperature by fat type interaction effect on mitochondrial attributes. At 36 °C, in birds fed on coconut oil- or beef tallow-supplemented diets, the expression levels of avUCP and avANT mRNA were lower (P < 0.05) but that of HSP70 mRNA was higher (P < 0.01) in comparison with the birds feeding on the olive oil- or soy oil-supplemented diets. An interaction effect was recorded between the temperature and fat type for ATP concentration and mitochondrial membrane potential (P < 0.01); with significant differences between birds receiving the coconut oil- or beef tallow-supplemented diets and the birds feeding on the soy oil- or olive oil-supplemented diets. It was also found that unsaturated fatty acids had a more significant effect on avUCP and avANT mRNA expression. It can be concluded that when using fat in the diet of heat stressed-broilers, it is advisable to choose a type, which has a lower effect on the expression of avUCP and avANT, and hence reduces the metabolic heat load in the bird.
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Affiliation(s)
- Kazem Seifi
- Department of Animal Science, Faculty of Animal Science and Fisheries, Sari Agricultural Sciences and Natural Resources University, Sari 4818168984, Iran.
| | - Mansour Rezaei
- Department of Animal Science, Faculty of Animal Science and Fisheries, Sari Agricultural Sciences and Natural Resources University, Sari 4818168984, Iran
| | - Asad Teimouri Yansari
- Department of Animal Science, Faculty of Animal Science and Fisheries, Sari Agricultural Sciences and Natural Resources University, Sari 4818168984, Iran
| | - Gholam Hossein Riazi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran 13145-1365, Iran
| | - Mohammad Javad Zamiri
- Department of Animal Science, College of Agriculture, Shiraz University, Shiraz 71964-84334, Iran
| | - Reza Heidari
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz 71468-64685, Iran
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45
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Dudek J, Hartmann M, Rehling P. The role of mitochondrial cardiolipin in heart function and its implication in cardiac disease. Biochim Biophys Acta Mol Basis Dis 2018; 1865:810-821. [PMID: 30837070 DOI: 10.1016/j.bbadis.2018.08.025] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 08/14/2018] [Accepted: 08/17/2018] [Indexed: 01/21/2023]
Abstract
Mitochondria play an essential role in the energy metabolism of the heart. Many of the essential functions are associated with mitochondrial membranes and oxidative phosphorylation driven by the respiratory chain. Mitochondrial membranes are unique in the cell as they contain the phospholipid cardiolipin. The important role of cardiolipin in cardiovascular health is highlighted by several cardiac diseases, in which cardiolipin plays a fundamental role. Barth syndrome, Sengers syndrome, and Dilated cardiomyopathy with ataxia (DCMA) are genetic disorders, which affect cardiolipin biosynthesis. Other cardiovascular diseases including ischemia/reperfusion injury and heart failure are also associated with changes in the cardiolipin pool. Here, we summarize molecular functions of cardiolipin in mitochondrial biogenesis and morphology. We highlight the role of cardiolipin for the respiratory chain, metabolite carriers, and mitochondrial metabolism and describe links to apoptosis and mitochondria specific autophagy (mitophagy) with possible implications in cardiac disease.
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Affiliation(s)
- Jan Dudek
- Institute of Cellular Biochemistry, University Medical Center Göttingen, D-37073 Göttingen, Germany
| | - Magnus Hartmann
- Institute of Cellular Biochemistry, University Medical Center Göttingen, D-37073 Göttingen, Germany
| | - Peter Rehling
- Institute of Cellular Biochemistry, University Medical Center Göttingen, D-37073 Göttingen, Germany; Max Planck Institute for Biophysical Chemistry, D-37077 Göttingen, Germany.
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46
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Nadjar A. Role of metabolic programming in the modulation of microglia phagocytosis by lipids. Prostaglandins Leukot Essent Fatty Acids 2018; 135:63-73. [PMID: 30103935 DOI: 10.1016/j.plefa.2018.07.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 07/11/2018] [Accepted: 07/11/2018] [Indexed: 02/06/2023]
Abstract
Microglia phagocytosis is an essential process to maintain lifelong brain homeostasis and clear potential toxic factors from the neuropil. Microglia can engulf cells or part of cells through the expression of specific receptors at their surface and activation of downstream signaling pathways to engulf material. Microglia phagocytosis is finely regulated and is under the dependence of many factors, including environmental cues such as dietary lipids. Yet, the molecular mechanisms implicated are still largely unknown. The present publication is a 'hypothesis review', assessing the possibility that lipid-mediated modulation of phagocytosis occurs by affecting bioenergetic pathways within microglia. I assess our present knowledge and the elements that allow drawing such hypothesis. I also list some of the important gaps in the literature that need to be filled in. I also consider opportunities for future therapeutic target including nutritional interventions.
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Affiliation(s)
- A Nadjar
- INRA, Nutrition et Neurobiologie Intégrée, UMR 1286, Bordeaux 33076, France; University Bordeaux, Nutrition et Neurobiologie Intégrée, UMR 1286, Bordeaux 33076, France.
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47
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How cardiolipin peroxidation alters the properties of the inner mitochondrial membrane? Chem Phys Lipids 2018; 214:15-23. [DOI: 10.1016/j.chemphyslip.2018.04.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 04/29/2018] [Indexed: 01/16/2023]
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48
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Hernández-Villa L, Manrique-Moreno M, Leidy C, Jemioła-Rzemińska M, Ortíz C, Strzałka K. Biophysical evaluation of cardiolipin content as a regulator of the membrane lytic effect of antimicrobial peptides. Biophys Chem 2018; 238:8-15. [DOI: 10.1016/j.bpc.2018.04.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 04/05/2018] [Accepted: 04/05/2018] [Indexed: 10/17/2022]
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49
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Chung DJ, Healy TM, McKenzie JL, Chicco AJ, Sparagna GC, Schulte PM. Mitochondria, Temperature, and the Pace of Life. Integr Comp Biol 2018; 58:578-590. [DOI: 10.1093/icb/icy013] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Affiliation(s)
- Dillon J Chung
- Department of Zoology and Biodiversity Research Centre, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4
| | - Timothy M Healy
- Department of Zoology and Biodiversity Research Centre, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4
- Marine Biology Research Division, Scripps Institution of Oceanography, University of California, San Diego, CA 92037, USA
| | - Jessica L McKenzie
- Department of Zoology and Biodiversity Research Centre, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4
| | - Adam J Chicco
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO 80523-1680, USA
| | - Genevieve C Sparagna
- Anschutz Medical Campus, Division of Cardiology, University of Colorado Denver, Aurora, CO 80045, USA
| | - Patricia M Schulte
- Department of Zoology and Biodiversity Research Centre, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4
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50
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de Taffin de Tilques M, Lasserre JP, Godard F, Sardin E, Bouhier M, Le Guedard M, Kucharczyk R, Petit PX, Testet E, di Rago JP, Tribouillard-Tanvier D. Decreasing cytosolic translation is beneficial to yeast and human Tafazzin-deficient cells. ACTA ACUST UNITED AC 2018; 5:220-232. [PMID: 29796387 PMCID: PMC5961916 DOI: 10.15698/mic2018.05.629] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Cardiolipin (CL) optimizes diverse mitochondrial processes, including oxidative phosphorylation (OXPHOS). To function properly, CL needs to be unsaturated, which requires the acyltransferase Tafazzin (TAZ). Loss-of-function mutations in the TAZ gene are responsible for the Barth syndrome (BTHS), a rare X-linked cardiomyopathy, presumably because of a diminished OXPHOS capacity. Herein we show that a partial inhibition of cytosolic protein synthesis, either chemically with the use of cycloheximide or by specific genetic mutations, fully restores biogenesis and the activity of the oxidative phosphorylation system in a yeast BTHS model (taz1Δ). Interestingly, the defaults in CL were not suppressed, indicating that they are not primarily responsible for the OXPHOS deficiency in taz1Δ yeast. Low concentrations of cycloheximide in the picomolar range were beneficial to TAZ-deficient HeLa cells, as evidenced by the recovery of a good proliferative capacity. These findings reveal that a diminished capacity of CL remodeling deficient cells to preserve protein homeostasis is likely an important factor contributing to the pathogenesis of BTHS. This in turn, identifies cytosolic translation as a potential therapeutic target for the treatment of this disease.
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Affiliation(s)
- Maxence de Taffin de Tilques
- Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, Université de Bordeaux, 1 rue Camille Saint-Saëns, 33077 Bordeaux cedex, France
| | - Jean-Paul Lasserre
- Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, Université de Bordeaux, 1 rue Camille Saint-Saëns, 33077 Bordeaux cedex, France
| | - François Godard
- Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, Université de Bordeaux, 1 rue Camille Saint-Saëns, 33077 Bordeaux cedex, France
| | - Elodie Sardin
- Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, Université de Bordeaux, 1 rue Camille Saint-Saëns, 33077 Bordeaux cedex, France
| | - Marine Bouhier
- Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, Université de Bordeaux, 1 rue Camille Saint-Saëns, 33077 Bordeaux cedex, France
| | - Marina Le Guedard
- Laboratoire de Biogenèse Membranaire, CNRS UMR 5200, Université de Bordeaux, INRA Bordeaux Aquitaine, Villenave d'Ornon, France.,LEB Aquitaine Transfert-ADERA, FR-33883 Villenave d'Ornon, Cedex, France
| | - Roza Kucharczyk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Patrice X Petit
- CNRS FR3636 Fédération de recherché en Neuroscience, Université Paris-Descartes, 45, rue des Saints-Pères, 75006 Paris, France
| | - Eric Testet
- Laboratoire de Biogenèse Membranaire, CNRS UMR 5200, Université de Bordeaux, INRA Bordeaux Aquitaine, Villenave d'Ornon, France
| | - Jean-Paul di Rago
- Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, Université de Bordeaux, 1 rue Camille Saint-Saëns, 33077 Bordeaux cedex, France
| | - Déborah Tribouillard-Tanvier
- Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, Université de Bordeaux, 1 rue Camille Saint-Saëns, 33077 Bordeaux cedex, France
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