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Cardiolipin

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https://www.readbyqxmd.com/read/28437736/murine-diet-induced-obesity-remodels-cardiac-and-liver-mitochondrial-phospholipid-acyl-chains-with-differential-effects-on-respiratory-enzyme-activity
#1
E Madison Sullivan, Amy Fix, Miranda J Crouch, Genevieve C Sparagna, Tonya N Zeczycki, David A Brown, Saame Raza Shaikh
Cardiac phospholipids, notably cardiolipin, undergo acyl chain remodeling and/or loss of content in aging and cardiovascular diseases, which is postulated to mechanistically impair mitochondrial function. Less is known about how diet-induced obesity influences cardiac phospholipid acyl chain composition and thus mitochondrial responses. Here we first tested if a high fat diet remodeled murine cardiac mitochondrial phospholipid acyl chain composition and consequently disrupted membrane packing, supercomplex formation and respiratory enzyme activity...
April 12, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28432553/cardiolipin-deficiency-causes-triacylglycerol-accumulation-in-saccharomyces-cerevisiae
#2
Pradeep Kumar Yadav, Ram Rajasekharan
In yeast, the synthesis of cardiolipin (CL) and phosphatidylethanolamine (PE) occurs mainly in mitochondria. CL and PE have overlapping functions, and they are required for mitochondrial function. PE is physiologically linked with triacylglycerol (TAG) metabolism in Saccharomyces cerevisiae, involving an acyl-CoA-independent pathway through the phospholipid:diacylglycerol acyltransferase activity of the Lro1 protein. There is no report on the physiological link between CL and TAG metabolism. Here we report a metabolic link between CL and TAG accumulation in the S...
April 21, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28423018/comprehensive-analysis-of-phospholipids-and-glycolipids-in-the-opportunistic-pathogen-enterococcus-faecalis
#3
Rafi Rashid, Amaury Cazenave-Gassiot, Iris H Gao, Zeus J Nair, Jaspal K Kumar, Liang Gao, Kimberly A Kline, Markus R Wenk
Enterococcus faecalis is a Gram-positive, opportunistic, pathogenic bacterium that causes a significant number of antibiotic-resistant infections in hospitalized patients. The development of antibiotic resistance in hospital-associated pathogens is a formidable public health threat. In E. faecalis and other Gram-positive pathogens, correlations exist between lipid composition and antibiotic resistance. Resistance to the last-resort antibiotic daptomycin is accompanied by a decrease in phosphatidylglycerol (PG) levels, whereas multiple peptide resistance factor (MprF) converts anionic PG into cationic lysyl-PG via a trans-esterification reaction, providing resistance to cationic antimicrobial peptides...
2017: PloS One
https://www.readbyqxmd.com/read/28421990/elevated-levels-of-soluble-cd40-ligand-are-associated-with-antiphospholipid-antibodies-in-patients-with-systemic-lupus-erythematosus
#4
Ki-Jo Kim, In-Woon Baek, Chong-Hyeon Yoon, Wan-Uk Kim, Chul-Soo Cho
OBJECTIVES: The CD40L/CD40 pathway is involved in the pathophysiology of atherothrombotic disease, and elevated levels of soluble CD40L (sCD40L) were reported in SLE patients. However, the clinical implication of sCD40L in SLE remains elusive. METHODS: We measured levels of plasma sCD40L in 241 SLE patients and 37 healthy controls and investigated its association with clinical manifestation and laboratory parameters. RESULTS: Levels of plasma sCD40L in SLE patients were significantly elevated compared with healthy controls (p=0...
April 18, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28418677/ph-dependence-of-ferricytochrome-c-conformational-transitions-during-binding-to-cardiolipin-membranes-evidence-for-histidine-as-the-distal-ligand-at-neutral-ph
#5
Bridget Milorey, Dmitry Malyshka, Reinhard Schweitzer-Stenner
The conformational changes of ferricytochrome c upon binding to cardiolipin-containing small unilamellar vesicles were studied at slightly acidic pH using fluorescence, visible circular dichroism, UV-visible absorption, and resonance Raman spectroscopy. The obtained spectroscopic response data suggest a mode of interaction, which is clearly distinct from the binding process observed at neutral pH. Evidence of a reversible and electrostatic binding mechanism under these conditions is provided through binding inhibition in the presence of 150 mM NaCl...
April 24, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28417627/a-retrospective-study-on-the-association-between-thyroid-autoantibodies-with-%C3%AE-2-glycoprotein-and-cardiolipin-antibodies-in-recurrent-miscarriage
#6
Regina Promberger, Katharina Walch, Rudolf Seemann, Sophie Pils, Johannes Ott
Etiologic factors for recurrent miscarriage (RM) include autoimmune diseases, the most frequently antiphospholipid syndrome and thyroiditis. Some women who suffer from RM might also have an altered immune system. We aimed to evaluate possible associations between anti-thyroid and anti-phospholipid antibodies in women with RM. In a retrospective case series 1 on 156 women with RM, major outcome parameters were antibodies against cardiolipin, β2-glycoprotein I, thyreoperoxidase (TPO-Ab), and thyroglobulin (TG-Ab)...
February 2017: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/28416487/metabolic-markers-and-statistical-prediction-of-serous-ovarian-cancer-aggressiveness-by-ambient-ionization-mass-spectrometry-imaging
#7
Marta Sans, Kshipra M Gharpure, Robert Tibshirani, Jialing Zhang, Li Liang, Jinsong Liu, Jonathan H Young, Robert Dood, Anil K Sood, Livia Eberlin
Ovarian high-grade serous carcinoma (HGSC) results in the highest mortality among gynecological cancers, developing rapidly and aggressively. Dissimilarly, serous borderline ovarian tumors (BOT) can progress into low-grade serous carcinomas and have relatively indolent clinical behavior. The underlying biological differences between HGSC and BOT call for accurate diagnostic methodologies and tailored treatment options, and identification of molecular markers of aggressiveness could provide valuable biochemical insights and improve disease management...
April 17, 2017: Cancer Research
https://www.readbyqxmd.com/read/28410198/specific-changes-in-mitochondrial-lipidome-alter-mitochondrial-proteome-and-increase-the-geroprotective-efficiency-of-lithocholic-acid-in-chronologically-aging-yeast
#8
Anna Leonov, Anthony Arlia-Ciommo, Simon D Bourque, Olivia Koupaki, Pavlo Kyryakov, Paméla Dakik, Mélissa McAuley, Younes Medkour, Karamat Mohammad, Tamara Di Maulo, Vladimir I Titorenko
We have previously found that exogenously added lithocholic acid delays yeast chronological aging. We demonstrated that lithocholic acid enters the yeast cell, is sorted to mitochondria, resides in both mitochondrial membranes, changes the relative concentrations of different membrane phospholipids, triggers changes in the concentrations of many mitochondrial proteins, and alters some key aspects of mitochondrial functionality. We hypothesized that the lithocholic acid-driven changes in mitochondrial lipidome may have a causal role in the remodeling of mitochondrial proteome, which may in turn alter the functional state of mitochondria to create a mitochondrial pattern that delays yeast chronological aging...
March 31, 2017: Oncotarget
https://www.readbyqxmd.com/read/28401195/live-birth-pregnancy-outcome-after-first-in-vitro-fertilization-treatment-in-a-patient-with-systemic-lupus-erythematosus-and-isolated-high-positive-iga-anti-%C3%AE-2glycoprotein-i-antibodies-a-case-report
#9
Hristina Andreeva, Marit Seip, Stanislava Koycheva
IgA anti-β2glycoprotein I antibodies (IgA-anti-β2GPI) seems to be the most prevalent isotype in patients with Systemic Lupus Erythematosus (SLE) with a significant association to thrombotic events. Both SLE and antiphospholipid syndrome (APS) can be associated with implantation failure, fetal loss and obstetric complications. Recent reports highlight the clinical value of IgA-anti-β2GPI determination in supporting in vitro fertilization (IVF) treatment and IVF pregnancy outcomes. We report a 36-year-old female diagnosed with SLE, endometriosis and unexplained infertility...
January 2017: Open Medicine (Warsaw, Poland)
https://www.readbyqxmd.com/read/28399627/relative-quantification-of-phospholipids-based-on-isotope-labeled-methylation-by-nanoflow-ultrahigh-performance-liquid-chromatography-tandem-mass-spectrometry-enhancement-in-cardiolipin-profiling
#10
Jong Cheol Lee, Seul Kee Byeon, Myeong Hee Moon
In this study, lipid analysis based on isotope-labeled methlylation (ILM) was performed by nanoflow liquid chromatog-raphy-eletrospray ionization-tandem mass spectrometry (nLC-ESI-MS/MS) for enhanced detection and quantification of targeted phospholipids. ILM depends on methylation of phosphate groups by (trimethylsilyl)diazomethane and the ILM based quantitation with reversed phase nLC-ESI-MS/MS provides advantages in PL profiling such as enhanced detectabil-ity of methylated PLs owing to increased hydrophobicity and substantial increase in resolution due to the increase of reten-tion...
April 11, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28386731/comparative-metagenomics-reveals-insights-into-the-deep-sea-adaptation-mechanism-of-the-microorganisms-in-iheya-hydrothermal-fields
#11
COMPARATIVE STUDY
Hai-Liang Wang, Li Sun
In this study, comparative metagenomic analysis was performed to investigate the genetic profiles of the microbial communities inhabiting the sediments surrounding Iheya North and Iheya Ridge hydrothermal fields. Four samples were used, which differed in their distances from hydrothermal vents. The results showed that genes involved in cell surface structure synthesis, polyamine metabolism and homeostasis, osmoadaptation, pH and Na(+) homeostasis, and heavy-metal transport were abundant. Pathways for putrescine and spermidine synthesis and transport were identified in the four metagenomes, which possibly participate in the regulation of cytoplasmic pH...
May 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28384257/serum-th1-and-th17-related-cytokines-and-autoantibodies-in-patients-with-posner-schlossman-syndrome
#12
Jun Zhao, Wenchieh Chen, Xiaosheng Huang, Shiming Peng, Tianhui Zhu, Zhihui Deng, Ping Liang, Hui Chang, Bao Jian Fan
Posner-Schlossman syndrome (PSS) shares some clinical features with uveitis and open angle glaucoma. Cytokines and autoantibodies have been associated with uveitis and open angle glaucoma. However, the role of serum cytokines and autoantibodies in the pathogenesis of PSS remains unknown. This study aimed to evaluate the associations of type 1 T helper (Th1) and Th17 related cytokines and autoantibodies with PSS. Peripheral blood serum samples were collected from 81 patients with PSS and 97 gender- and age-matched healthy blood donors...
2017: PloS One
https://www.readbyqxmd.com/read/28379402/slp-2-interacts-with-parkin-in-mitochondria-and-prevents-mitochondrial-dysfunction-in-parkin-deficient-human-ipsc-derived-neurons-and-drosophila
#13
Alessandra Zanon, Sreehari Kalvakuri, Aleksandar Rakovic, Luisa Foco, Marianna Guida, Christine Schwienbacher, Alice Serafin, Franziska Rudolph, Michaela Trilck, Anne Grünewald, Nancy Stanslowsky, Florian Wegner, Valentina Giorgio, Alexandros A Lavdas, Rolf Bodmer, Peter P Pramstaller, Christine Klein, Andrew A Hicks, Irene Pichler, Philip Seibler
Mutations in the Parkin gene (PARK2) have been linked to a recessive form of Parkinson's disease (PD) characterized by the loss of dopaminergic neurons in the substantia nigra. Deficiencies of mitochondrial respiratory chain complex I activity have been observed in the substantia nigra of PD patients, and loss of Parkin results in the reduction of complex I activity shown in various cell and animal models. Using co-immunoprecipitation and proximity ligation assays on endogenous proteins, we demonstrate that Parkin interacts with mitochondrial Stomatin-like protein 2 (SLP-2), which also binds the mitochondrial lipid cardiolipin and functions in the assembly of respiratory chain proteins...
April 3, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28376879/cell-surface-engineering-of-bacillus-subtilis-improves-production-yields-of-heterologously-expressed-%C3%AE-amylases
#14
Haojie Cao, Auke J van Heel, Hifza Ahmed, Maarten Mols, Oscar P Kuipers
BACKGROUND: Bacillus subtilis is widely used as a cell factory for numerous heterologous proteins of commercial value and medical interest. To explore the possibility of further enhancing the secretion potential of this model bacterium, a library of engineered strains with modified cell surface components was constructed, and the corresponding influences on protein secretion were investigated by analyzing the secretion of α-amylase variants with either low-, neutral- or high- isoelectric points (pI)...
April 4, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28371608/studying-factors-involved-in-biogenesis-of-lysobacter-sp-xl1-outer-membrane-vesicles
#15
I V Kudryakova, N E Suzina, N G Vinokurova, N A Shishkova, N V Vasilyeva
The Gram-negative bacterium Lysobacter sp. XL1 produces outer membrane vesicles that are heterogeneous in size, density, and protein composition. One of the subpopulations is secretory vesicles for lytic protease L5 of Lysobacter sp. XL1 (Kudryakova et al. (2015) FEMS Microbiol. Lett., 362, fnv137). Protein L5 was assumed to influence biogenesis of these secretory vesicles that contain it. Using a Pseudomonas fluorescens Q2-87/B expression system, it was shown that the recombinant L5 protein may act as a factor of vesicle biogenesis...
April 2017: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/28367808/-role-of-mitophagy-in-the-mitochondrial-quality-control
#16
Pierre Vigié, Nadine Camougrand
Mitochondria are highly dynamic organelles that provide essential metabolic functions and represent the major bioenergetic hub of eukaryotic cells. Mitochondrial dysfunctions are implicated in numerous diseases. Therefore, maintenance of a healthy pool of mitochondria is required for cellular function and survival. Mitochondrial quality control is achieved through several mechanisms that act at different levels: proteases and chaperones, the Ubiquitin-Proteasome-System (UPS) and mitophagy. Multiple mitophagy-involved programs operate independently or undergo crosstalk, and require modulated receptor activities at the outer membranes of mitochondria...
March 2017: Médecine Sciences: M/S
https://www.readbyqxmd.com/read/28363084/the-metabolic-syndrome-induces-early-changes-in%C3%A2-the-swine-renal-medullary-mitochondria
#17
Alfonso Eirin, John R Woollard, Christopher M Ferguson, Kyra L Jordan, Hui Tang, Stephen C Textor, Amir Lerman, Lilach O Lerman
The metabolic syndrome (MetS) is associated with nutrient surplus and kidney hyperfiltration, accelerating chronic renal failure. Mitochondria can be overwhelmed by substrate excess, leading to inefficient energy production and thereby tissue hypoxia. Mitochondrial dysfunction is emerging as an important determinant of renal damage, but whether it contributes to MetS-induced renal injury remains unknown. We hypothesized that early MetS induces kidney mitochondrial abnormalities and dysfunction, which would be notable in the vulnerable renal medulla...
March 11, 2017: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/28361003/case-report-primary-osteonecrosis-associated-with-thrombophilia-hypofibrinolysis-and-worsened-by-testosterone-therapy
#18
Michael Ian Jarman, Kevin Lee, Ariel Kanevsky, Sarah Min, Ilana Schlam, Chris Mahida, Ali Huda, Alexander Milgrom, Naila Goldenberg, Charles J Glueck, Ping Wang
BACKGROUND: Familial and acquired thrombophilia are often etiologic for idiopathic hip and jaw osteonecrosis (ON), and testosterone therapy (TT) can interact with thrombophilia, worsening ON. CASE PRESENTATION: Case 1: A 62-year-old Caucasian male (previous deep venous thrombosis), on warfarin 1 year for atrial fibrillation (AF), had non-specific right hip-abdominal pain for 2 years. CT scan revealed bilateral femoral head ON without collapse. Coagulation studies revealed Factor V Leiden (FVL) heterozygosity, 4G/4G plasminogen activator inhibitor (PAI) homozygosity, high anti-cardiolipin (ACLA) IgM antibodies, and endothelial nitric oxide (NO) synthase (eNOS) T786C homozygosity (reduced conversion of L-arginine to NO, required for bone health)...
2017: BMC Hematology
https://www.readbyqxmd.com/read/28355983/mesenteric-inflammatory-veno-occlusive-disease-of-the-spleen-metasynchronous-with-two-arterial-thrombotic-events-in-systemic-lupus-erythematosus
#19
D Allali, G Puppa, C Chizzolini
Vasculitides, particularly those affecting small vessels, are known to complicate systemic lupus erythematosus (SLE); however, isolated venulitis of the mesenteric bed has rarely been reported. Here we relate the case of a 46-year-old woman with SLE who presented with acute abdominal pain due to artery thrombosis and extended splenic ischemia requiring splenectomy. The histological examination revealed diffuse venulitis in the absence of arterial vasculitis consistent with the definition of mesenteric inflammatory veno-occlusive disease (MIVOD)...
January 1, 2017: Lupus
https://www.readbyqxmd.com/read/28341873/exploring-the-plasmatic-platelet-activating-factor-acetylhydrolase-activity-in-patients-with-anti-phospholipid-antibodies
#20
Martina Fabris, Adriana Cifù, Cinzia Pistis, Massimo Siega-Ducaton, Desrè Ethel Fontana, Roberta Giacomello, Elio Tonutti, Francesco Curcio
PURPOSE: To explore the role of plasmatic platelet-activating factor acetylhydrolase (PAF-AH), a marker of cardiovascular risk, in patients with anti-phospholipid antibodies (aPL). METHODS: PAF-AH activity was assessed in a series of 167 unselected patients screened for aPL in a context of thrombotic events, risk of thrombosis or obstetric complications and in 77 blood donors. RESULTS: 116/167 patients showed positive results for at least one aPL among IgG/IgM anti-prothrombin/phosphatidylserine (aPS/PT), anti-cardiolipin (aCL), anti-beta2-glycoprotein I (aβ2GPI) or lupus anticoagulant (LAC), while 51/167 patients resulted aPL-negative...
December 2017: Auto- Immunity Highlights
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