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Cardiolipin

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https://www.readbyqxmd.com/read/28213011/calorie-restriction-promotes-cardiolipin-biosynthesis-and-distribution-between-mitochondrial-membranes
#1
Luis Alberto Luévano-Martínez, Maria Fernanda Forni, Julia Peloggia, Ii-Sei Watanabe, Alicia J Kowaltowski
Calorie restriction (CR) has been amply demonstrated to modify mitochondrial function. However, little is known regarding the effects of this dietary regimen on mitochondrial membranes. We isolated phospholipids from rat liver mitochondria from animals on CR or ad libitum diets and found that mitochondria from ad libitum animals present an increased content of lipoperoxides and the content of cardiolipin. Cardiolipin is the main anionic phospholipid present in mitochondrial membranes, and plays a key role in mitochondrial function, signaling and stress response...
February 14, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28212735/elimination-of-the-unnecessary-intra-and-extracellular-signaling-by-anionic-phospholipids
#2
REVIEW
Valerian E Kagan, Hülya Bayır, Yulia Y Tyurina, Sergey B Bolevich, John J Maguire, Bengt Fadeel, Krishnakumar Balasubramanian
High fidelity of biological systems is frequently achieved by duplication of the essential intracellular machineries or, removal of the entire cell, which becomes unnecessary or even harmful in altered physiological environments. Carefully controlled removal of these cells, without damaging normal cells, requires precise signaling, and is critical to maintaining homeostasis. This review describes how two anionic phospholipids - phosphatidylserine (PS) and cardiolipin (CL) - residing in distinct compartments of the cell, signal removal of "the unnecessary" using several uniform principles...
January 15, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28209927/improved-health-span-and-lifespan-in-mtdna-mutator-mice-treated-with-the-mitochondrially-targeted-antioxidant-skq1
#3
Irina G Shabalina, Mikhail Yu Vyssokikh, Natalia Gibanova, Robert I Csikasz, Daniel Edgar, Anne Hallden-Waldemarson, Zinaida Rozhdestvenskaya, Lora E Bakeeva, Valeria B Vays, Antonina V Pustovidko, Maxim V Skulachev, Barbara Cannon, Vladimir P Skulachev, Jan Nedergaard
MtDNA mutator mice exhibit marked features of premature aging. We find that these mice treated from age of ≈100 days with the mitochondria-targeted antioxidant SkQ1 showed a delayed appearance of traits of aging such as kyphosis, alopecia, lowering of body temperature, body weight loss, as well as ameliorated heart, kidney and liver pathologies. These effects of SkQ1 are suggested to be related to an alleviation of the effects of an enhanced reactive oxygen species (ROS) level in mtDNA mutator mice: the increased mitochondrial ROS released due to mitochondrial mutations probably interact with polyunsaturated fatty acids in cardiolipin, releasing malondialdehyde and 4-hydroxynonenal that form protein adducts and thus diminishes mitochondrial functions...
February 15, 2017: Aging
https://www.readbyqxmd.com/read/28202545/the-basis-for-acyl-specificity-in-the-tafazzin-reaction
#4
Michael Schlame, Yang Xu, Mindong Ren
Tafazzin is a mitochondrial enzyme that transfers fatty acids from phospholipids to lysophospholipids. Mutations in tafazzin cause abnormal molecular species of cardiolipin and the clinical phenotype of Barth syndrome. However, the mechanism by which tafazzin creates acyl specificity has been controversial. We have shown that the lipid phase state can produce acyl specificity in the tafazzin reaction but others have reported that tafazzin itself carries enzymatic specificity. To resolve this issue, we replicated and expanded the controversial experiments, i...
February 15, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28202400/protective-role-of-mitochondrial-peroxiredoxin-iii-against-uvb-induced-apoptosis-of-epidermal-keratinocytes
#5
Jin Young Baek, Sujin Park, Jiyoung Park, Ji Yong Jang, Su Bin Wang, Sin Ri Kim, Hyun Ae Woo, Kyung Min Lim, Tong-Shin Chang
Ultraviolet B (UVB) light induces generation of reactive oxygen species (ROS), ultimately leading to skin cell damage. Mitochondria are a major source of ROS in UVB-irradiated skin cells, with increased levels of mitochondrial ROS having been implicated in keratinocyte apoptosis. Peroxiredoxin III (PrxIII) is the most abundant and potent H2O2-removing enzyme in the mitochondria of most cell types. Here, the protective role of PrxIII against UVB-induced apoptosis of epidermal keratinocytes was investigated. Mitochondrial H2O2 levels were differentiated from other types of ROS using mitochondria-specific fluorescent H2O2 indicators...
February 12, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28196959/membrane-remodeling-by-a-bacterial-phospholipid-methylating-enzyme
#6
Linna Danne, Meriyem Aktas, Andreas Unger, Wolfgang A Linke, Ralf Erdmann, Franz Narberhaus
Membrane deformation by proteins is a universal phenomenon that has been studied extensively in eukaryotes but much less in prokaryotes. In this study, we discovered a membrane-deforming activity of the phospholipid N-methyltransferase PmtA from the plant-pathogenic bacterium Agrobacterium tumefaciens PmtA catalyzes the successive three-step N-methylation of phosphatidylethanolamine to phosphatidylcholine. Here, we defined the lipid and protein requirements for the membrane-remodeling activity of PmtA by a combination of transmission electron microscopy and liposome interaction studies...
February 14, 2017: MBio
https://www.readbyqxmd.com/read/28196853/impaired-cardiac-and-skeletal-muscle-bioenergetics-in-children-adolescents-and-young-adults-with-barth-syndrome
#7
Adil Bashir, Kathryn L Bohnert, Dominic N Reeds, Linda R Peterson, Adam J Bittel, Lisa de Las Fuentes, Christina A Pacak, Barry J Byrne, W Todd Cade
: Barth syndrome (BTHS) is an X-linked condition characterized by altered cardiolipin metabolism and cardioskeletal myopathy. We sought to compare cardiac and skeletal muscle bioenergetics in children, adolescents, and young adults with BTHS and unaffected controls and examine their relationships with cardiac function and exercise capacity. Children/adolescents and young adults with BTHS (n = 20) and children/adolescent and young adult control participants (n = 23, total n = 43) underwent (31)P magnetic resonance spectroscopy ((31)P-MRS) of the lower extremity (calf) and heart for estimation of skeletal muscle and cardiac bioenergetics...
February 2017: Physiological Reports
https://www.readbyqxmd.com/read/28188263/overexpression-of-mitochondrial-oxodicarboxylate-carrier-odc1-preserves-oxidative-phosphorylation-in-a-yeast-model-of-the-barth-syndrome
#8
Maxence de Taffin de Tilques, Déborah Tribouillard-Tanvier, Emmanuel Tétaud, Eric Testet, Jean-Paul di Rago, Jean-Paul Lasserre
Cardiolipin (CL) is a diglycerol phospholipid mostly found in mitochondria where it optimizes numerous processes including oxidative phosphorylation (OXPHOS). To function properly CL needs to be unsaturated, which requires the acyltransferase tafazzin. Loss-of-function mutations in this protein are responsible for the Barth syndrome (BTHS), presumably because of a diminished OXPHOS capacity. Here we show that overexpressing Odc1p, a conserved oxodicarboxylic acid carrier located in the mitochondrial inner membrane, fully restores oxidative phosphorylation in a yeast model (taz1Δ) of the Barth syndrome...
February 10, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28185927/evidence-of-proteolipid-domain-formation-in-an-inner-mitochondrial-membrane-mimicking-model
#9
Mouhedine Cheniour, Jonathan Brewer, Luis Bagatolli, Olivier Marcillat, Thierry Granjon
BACKGROUND: Mitochondrial Creatine kinase (mtCK) is highly abundant in mitochondria; its quantity is equimolecular to the Adenylic Nucleotide Translocator and represents 1% of the mitochondrial proteins. It is a multitask protein localized in the mitochondria intermembrane space where it binds to the specific cardiolipin (CL) phospholipid. If mtCK was initially thought to be exclusively implicated in energy transfer between mitochondria and cytosol through a mechanism referred to as the phosphocreatine shuttle, several recent studies suggested an additional role in maintaining mitochondria membrane structure...
February 6, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28167530/mutational-analysis-of-the-qrrq-motif-in-the-yeast-hig1-type-2-protein-rcf1-reveals-a-regulatory-role-for-the-cytochrome-c-oxidase-complex
#10
Joshua Garlich, Valentina Strecker, Ilka Wittig, Rosemary A Stuart
The yeast Rcf1 protein is a member of the conserved family of proteins termed the hypoxia induced gene (domain) 1 (Hig1 or HIGD1) family. Rcf1 interacts with components of the mitochondrial oxidative phosphorylation system in particular the cytochrome bc1 (complex III)-cytochrome c oxidase (complex IV) supercomplex (termed III-IV) and the ADP/ATP carrier proteins (AAC). Rcf1 plays a role in the assembly and modulation of the activity of complex IV, however, the molecular basis for how Rcf1 influences the activity of complex IV is currently unknown...
February 6, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28166601/mechanisms-of-cellular-activation-in-the-antiphospholipid-syndrome
#11
Nadine Müller-Calleja, Karl J Lackner
It is long known that antiphospholipid antibodies (aPL) induce proinflammatory and procoagulant cellular responses. The underlying signal transduction has been a major focus of research and is the topic of this review. An amazingly heterogeneous panel of signaling pathways has been described and it turns out that at least some of this heterogeneity can be explained by effects of distinct aPL species. On the one hand, there are antibodies against β2-glycoprotein I (β2GPI) which appear to exert their cellular effects only as a complex of β2GPI/anti-β2GPI...
February 6, 2017: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/28164388/exclusion-of-assembled-mreb-by-anionic-phospholipids-at-cell-poles-confers-cell-polarity-for-bidirectional-growth
#12
Takuma Kawazura, Kanon Matsumoto, Koki Kojima, Fumiya Kato, Tomomi Kanai, Hironori Niki, Daisuke Shiomi
Cell polarity determines the direction of cell growth in bacteria. MreB actin spatially regulates peptidoglycan synthesis to enable cells to elongate bidirectionally. MreB densely localizes in the cylindrical part of the rod cell and not in polar regions in Escherichia coli. When treated with A22, which inhibits MreB polymerization, rod-shaped cells became round and MreB was diffusely distributed throughout the cytoplasmic membrane. A22 removal resulted in restoration of the rod shape. Initially, diffuse MreB started to re-assemble, and MreB-free zones were subsequently observed in the cytoplasmic membrane...
February 6, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28154144/gene-polymorphism-linked-to-increased-asthma-and-ibd-risk-alters-gasdermin-b-structure-a-sulfatide-and-phosphoinositide-binding-protein
#13
Kinlin L Chao, Liudmila Kulakova, Osnat Herzberg
The exact function of human gasdermin-B (GSDMB), which regulates differentiation and growth of epithelial cells, is yet to be elucidated. In human epidermal growth factor receptor 2 (HER2)-positive breast cancer, GSDMB gene amplification and protein overexpression indicate a poor response to HER2-targeted therapy. Genome-wide association studies revealed a correlation between GSDMB SNPs and an increased susceptibility to Crohn's disease, ulcerative colitis, and asthma. The N- and C-terminal domains of all gasdermins possess lipid-binding and regulatory activities, respectively...
February 1, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28151504/-cardiac-abnormalities-in-patients-with-systemic-lupus-erythematosus-the-role-of-antiphospholipid-antibodies
#14
Manuel Monti, Francesco Borgognoni, Loredana Pastacci, Giovanni Maria Vincentelli
BACKGROUND: Systemic lupus erythematosus (SLE) is a chronic inflammatory disease that has protean manifestations and follows a relapsing and remitting course. More than 90% of cases of SLE occur in women, frequently starting at childbearing age. It is characterized by the presence of autoantibodies potentially directed toward every organ or apparatus. Cardiac alterations are frequent in patients affected by SLE and the simultaneous presence of antiphospholipid antibodies (aPL), able to cause arterial thrombosis in any vascular district, is considered a possible risk factor for cardiac damage in SLE patients...
December 2016: Giornale Italiano di Cardiologia
https://www.readbyqxmd.com/read/28137779/cardiolipin-promotes-electron-transport-between-ubiquinone-and-complex-i-to-rescue-pink1-deficiency
#15
Melissa Vos, Ann Geens, Claudia Böhm, Liesbeth Deaulmerie, Jef Swerts, Matteo Rossi, Katleen Craessaerts, Elvira P Leites, Philip Seibler, Aleksandar Rakovic, Thora Lohnau, Bart De Strooper, Sarah-Maria Fendt, Vanessa A Morais, Christine Klein, Patrik Verstreken
PINK1 is mutated in Parkinson's disease (PD), and mutations cause mitochondrial defects that include inefficient electron transport between complex I and ubiquinone. Neurodegeneration is also connected to changes in lipid homeostasis, but how these are related to PINK1-induced mitochondrial dysfunction is unknown. Based on an unbiased genetic screen, we found that partial genetic and pharmacological inhibition of fatty acid synthase (FASN) suppresses toxicity induced by PINK1 deficiency in flies, mouse cells, patient-derived fibroblasts, and induced pluripotent stem cell-derived dopaminergic neurons...
January 30, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28131901/cancer-growth-regulation-by-4-hydroxynonenal
#16
REVIEW
Ana Cipak Gasparovic, Lidija Milkovic, Suzana Borovic Sunjic, Neven Zarkovic
While reactive oxygen species (ROS) gain their carcinogenic effects by DNA mutations, if generated in the vicinity of genome, lipid peroxidation products, notably 4-hydroxynonenal (HNE), have much more complex modes of activities. Namely, while ROS are short living and have short efficiency distance range (in nm or µm) HNE has strong binding affinity for proteins, thus forming relatively stable adducts. Hence, HNE can diffuse from the site or origin changing structure and function of respective proteins. Consequently HNE can influence proliferation, differentiation and apoptosis of cancer cells on one hand, while on the other it can affect genome functionality, too...
January 25, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28130684/clinical-characteristics-and-laboratory-findings-of-252-chinese-patients-with-anti-phospholipid-syndrome-comparison-with-euro-phospholipid-cohort
#17
Hui Shi, Jia-Lin Teng, Yue Sun, Xin-Yao Wu, Qiong-Yi Hu, Hong-Lei Liu, Xiao-Bing Cheng, Yu-Feng Yin, Jun-Na Ye, Pojen P Chen, Cheng-de Yang
This study aims to characterize the Chinese Han patients with anti-phospholipid syndrome (APS) and compare the data with those of the Euro-Phospholipid cohort. We conducted a single center study consisting of 252 patients with definite APS from 2000 to 2015. We analyzed the clinical and laboratory characteristics of our cohort and compared the data with those of the Euro-Phospholipid cohort. Our cohort consisted of 216 females and 36 males, with a mean age at entry into this study of 41 years (range 11-74 years)...
January 27, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28130408/hormone-deprivation-alters-mitochondrial-function-and-lipid-profile-in-the-hippocampus
#18
Sandra Zárate, Mariana Astiz, Natalia Magnani, Mercedes Imsen, Florencia Merino, Silvia Álvarez, Analía Reinés, Adriana Seilicovich
Mitochondrial dysfunction is a common hallmark in aging. In the female, reproductive senescence is characterized by loss of ovarian hormones, many of whose neuroprotective effects converge upon mitochondria. Mitochondria functional integrity is dependent on membrane fatty acid and phospholipid composition, parameters also affected during aging. The effect of long-term ovarian hormone deprivation upon mitochondrial function and its putative association with changes in mitochondrial membrane lipid profile in the hippocampus, an area primarily affected during aging and highly responsive to ovarian hormones, is unknown...
January 27, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28123175/a-novel-mutation-in-taz-causes-mitochondrial-respiratory-chain-disorder-without-cardiomyopathy
#19
Nurun N Borna, Yoshihito Kishita, Kaori Ishikawa, Kazuto Nakada, Jun-Ichi Hayashi, Yoshimi Tokuzawa, Masakazu Kohda, Hiromi Nyuzuki, Yzumi Yamashita-Sugahara, Takashi Nasu, Atsuhito Takeda, Kei Murayama, Akira Ohtake, Yasushi Okazaki
Tafazzin, encoded by the TAZ gene, is a mitochondrial membrane-associated protein that remodels cardiolipin (CL), an important mitochondrial phospholipid. TAZ mutations are associated with Barth syndrome (BTHS). BTHS is an X-linked multisystemic disorder affecting usually male patients. Through sequence analysis of TAZ, we found one novel mutation c.39_60del p.(Pro14Alafs*19) by whole-exome sequencing and a reported missense mutation c.280C>T p.(Arg94Cys) by Sanger sequencing in two male patients (Pt1 and Pt2)...
January 26, 2017: Journal of Human Genetics
https://www.readbyqxmd.com/read/28120892/antimicrobial-nanoplexes-meet-model-bacterial-membranes-the-key-role-of-cardiolipin
#20
Alejandro Marín-Menéndez, Costanza Montis, Teresa Díaz-Calvo, Davide Carta, Kostas Hatzixanthis, Christopher J Morris, Michael McArthur, Debora Berti
Antimicrobial resistance to traditional antibiotics is a crucial challenge of medical research. Oligonucleotide therapeutics, such as antisense or Transcription Factor Decoys (TFDs), have the potential to circumvent current resistance mechanisms by acting on novel targets. However, their full translation into clinical application requires efficient delivery strategies and fundamental comprehension of their interaction with target bacterial cells. To address these points, we employed a novel cationic bolaamphiphile that binds TFDs with high affinity to form self-assembled complexes (nanoplexes)...
January 25, 2017: Scientific Reports
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