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https://www.readbyqxmd.com/read/28646215/single-molecule-and-multiple-bond-characterization-of-catch-bond-associated-cytoadhesion-in-malaria
#1
Ying Bena Lim, Juzar Thingna, Jianshu Cao, Chwee Teck Lim
The adhesion of malaria infected red blood cells (iRBCs) to host endothelial receptors in the microvasculature, or cytoadhesion, is associated with severe disease pathology such as multiple organ failure and cerebral malaria. Malaria iRBCs have been shown to bind to several receptors, of which intercellular adhesion molecule 1 (ICAM-1) upregulation in brain microvasculature is the only one correlated to cerebral malaria. We utilize a biophysical approach to study the interactions between iRBCs and ICAM-1. At the single molecule level, force spectroscopy experiments reveal that ICAM-1 forms catch bond interactions with Plasmodium falciparum parasite iRBCs...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28641384/acute-testosterone-deficiency-alters-adipose-tissue-fatty-acid-storage
#2
Sylvia Santosa, Nikki C Bush, Michael D Jensen
Context: Although the long-term effects of testosterone on adipose tissue lipid metabolism in men have been defined, the short-term regulation of these effects is not well understood. Objective: We examined the effects of acute testosterone withdrawal on subcutaneous abdominal and femoral adipose tissue fatty acid (FA) storage and cellular mechanisms. Design: This was a prospective, randomized trial. Setting: Mayo Clinic Clinical Research Unit...
June 21, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28637956/cd36-involvement-in-the-olfactory-perception-of-oleic-aldehyde-an-odour-active-volatile-compound-in-mice
#3
Shinhye Lee, Tsuzuki Satoshi, Takahiko Amitsuka, Daisaku Masuda, Shizuya Yamashita, Kazuo Inoue
Cluster of differentiation 36 (CD36) is a broadly expressed transmembrane receptor that has multiple ligands. It has been found to occur abundantly on the surface of the olfactory epithelium in mice and postulated to play a role in mammalian olfaction. However, there have been no ethological analyses of the mammalian behaviour showing CD36 involvement in the olfactory perception of a distinct odour-active volatile compound. In this study, we aimed to assess whether mammals perceive oleic aldehyde, an odour-active volatile that serves as a potential CD36 ligand, and if so, whether CD36 is involved in the sensing by following measurements using CD36-knockout mice and their wild-type littermates...
2017: Biomedical Research
https://www.readbyqxmd.com/read/28636830/attenuation-of-hepatic-steatosis-by-purple-sweet-potato-color-is-associated-with-blocking-src-erk-c-ebp%C3%AE-signalling-in-high-fat-diet-treated-mice
#4
Xin Wang, Zi-Feng Zhang, Gui-Hong Zheng, Ai-Min Wang, Chun-Hui Sun, Su-Ping Qin, Juan Zhuang, Jun Lu, Dai-Fu Ma, Yuan-Lin Zheng
Our previous work showed that purple sweet potato color (PSPC), a class of naturally occurring anthocyanins, effectively improved hepatic glucose metabolic dysfunction in high-fat diet (HFD)-treated mice. This study investigated the effects of PSPC on HFD-induced hepatic steatosis and the signalling events associated with these effects. Mice were divided into four groups: Control group, HFD group, HFD+PSPC group and PSPC group. PSPC was administered daily for 20 weeks at oral doses of 700 mg/kg/day. Our results showed that PSPC significantly improved obesity and related metabolic parameters, as well as liver injury in HFD-treated mice...
June 21, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28634191/cd36-knockout-mice-are-protected-against-lithogenic-diet-induced-gallstones
#5
Yan Xie, Vincenza Cifarelli, Terri Pietka, Elizabeth P Newberry, Susan M Kennedy, Amin Khalifeh-Soltani, Robin Clugston, Kamran Atabai, Nada A Abumrad, Nicholas O Davidson
The scavenger receptor and multiligand transporter CD36 functions to promote cellular free fatty acid uptake and regulates aspects of both hepatic and intestinal cholesterol metabolism. However, the role of CD36 in regulating canalicular and biliary cholesterol transport and secretion is unknown. Here we show that germline Cd36 knockout mice are protected against lithogenic diet (LD) induced gallstones compared to congenic (C57BL6/J) controls. Cd36 knockout mice crossed into congenic L-Fabp knockout mice (DKO mice) demonstrated protection against LD induced gallstones, reversing the susceptibility phenotype observed in L-Fabp knockout mice...
June 20, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28633967/the-effects-of-chronic-faah-inhibition-on-myocardial-lipid-metabolism-in-normotensive-and-doca-salt-hypertensive-rats
#6
Agnieszka Polak, Ewa Harasim-Symbor, Barbara Malinowska, Irena Kasacka, Anna Pędzińska-Betiuk, Jolanta Weresa, Adrian Chabowski
AIMS: There is significant evidence that the endocannabinoid system (ECS) takes part in the regulation of the cardiovascular system in hypertension. It is quite well established that hypertension causes several changes in the heart metabolism, but it is still unknown whether the ECS affects this process. Therefore, we investigated the influence of prolonged ECS activation on myocardial lipid metabolism in deoxycorticosterone acetate (DOCA)-salt hypertensive rats by chronic fatty acid amide hydrolase (FAAH) inhibition...
June 17, 2017: Life Sciences
https://www.readbyqxmd.com/read/28631352/overexpressing-stamp2-attenuates-adipose-tissue-angiogenesis-and-insulin-resistance-in-diabetic-apoe-ldlr-mouse-via-a-ppar%C3%AE-cd36-pathway
#7
Feng Wang, Lu Han, Ran-Ran Qin, Yao-Yuan Zhang, Di Wang, Zhi-Hao Wang, Meng-Xiong Tang, Yun Zhang, Ming Zhong, Wei Zhang
The aim of this study was to investigate whether overexpression of STAMP2 improves insulin resistance by regulating angiogenesis in adipose tissues. The characteristics of diabetic mice were measured by serial metabolite and pathology tests. Samples were obtained from epididymal, subcutaneous and brown adipose tissues. Histological and morphological analysis demonstrated that STAMP2 gene overexpression reduced adipocyte size, angiogenesis in epididymal and brown adipose tissues. On aortic ring assay, microvessels sprouting from aortas were significantly inhibited after STAMP2 gene overexpression...
June 19, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28629284/anxiety-leads-to-up-regulation-of-cd36-on-the-monocytes-of-chronic-hepatitis-b-infected-patients
#8
Mohammad Hosein Bakhshi Aliabad, Elham Jafari, Mansoureh Karimi Kakh, Reza Nosratababadi, Hamid Bakhshi, Mohammad Hassan Sheikhha, Reza Bidaki, Azade Askari, Mohammad Kazemi Arababadi
Introduction It has been hypothesized that mental disorders including depression and anxiety can affect immune responses. The study was done to evaluate the relation between depression and anxiety and expression levels of CD36, CD68, and CD9 on peripheral blood monocytes of chronic hepatitis B (CHB) patients. Methods Sixty CHB patients were selected with various ranges of depression and anxiety. Depression and anxiety were evaluated using a standard questionnaire by an expert psychiatrist according to BECK's Depression Inventory II and Hamilton Anxiety Rating Scale, respectively...
July 2016: International Journal of Psychiatry in Medicine
https://www.readbyqxmd.com/read/28629148/involvement-of-cd36-in-modulating-the-decrease-of-npy-and-agrp-induced-by-acute-palmitic-acid-stimulation-in-n1e-115-cells
#9
Yan Ma, Xiaoyi Wang, Hongying Yang, Xu Zhang, Nianhong Yang
Central nervous system (CNS) fatty acid sensing plays an important role in the regulation of food intake, and palmitic acid (PA) is the most important long chain fatty acid (LCFA) in the mammalian diet. To explore the effect of PA on central neuropeptide expression and the role of the cluster of the differentiation of 36 (CD36) in the process, N1E-115 cells were cultured with PA in the presence or absence of sulfosuccinimidyl-oleate (SSO), a CD36 inhibitor. Results showed that 10 μmol/L PA significantly reduced NPY and AgRP mRNA expression after 20 min of exposure, while the expression of CD36 was upregulated...
June 17, 2017: Nutrients
https://www.readbyqxmd.com/read/28623741/oxidized-ldl-activated-eosinophil-polarize-macrophage-phenotype-from-m2-to-m1-through-activation-of-cd36-scavenger-receptor
#10
Minghui Qin, Lai Wang, Fuqiang Li, Mingjie Yang, Lei Song, Fang Tian, Ada Yukht, Prediman K Shah, Marc E Rothenberg, Behrooz G Sharifi
BACKGROUND AND AIMS: Inflammation, particularly innate immunity, plays an important role in cardiovascular diseases. The aim of this study was to investigate whether atherogenic determinants such as oxidized LDL modulate the phenotype of eosinophils. METHODS: Cultured eosinophils were treated with oxidized LDL and the expression of selective inflammatory and anti-inflammatory cytokines was determined. In addition, the eosinophil receptor and signaling that mediate these events were identified...
May 20, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28623272/exosomes-derived-from-palmitic-acid-treated-hepatocytes-induce-fibrotic-activation-of-hepatic-stellate-cells
#11
Young-Sun Lee, So Yeon Kim, Eunjung Ko, Jun-Hee Lee, Hyon-Seung Yi, Yang Jae Yoo, Jihye Je, Sang Jun Suh, Young Kul Jung, Ji Hoon Kim, Yeon Seok Seo, Hyung Joon Yim, Won-Il Jeong, Jong Eun Yeon, Soon Ho Um, Kwan Soo Byun
Non-alcoholic fatty liver disease (NAFLD) is a dominant cause of chronic liver disease, but the exact mechanism of progression from simple steatosis to nonalcoholic steatohepatitis (NASH) remains unknown. Here, we investigated the role of exosomes in NAFLD progression. Exosomes were isolated from a human hepatoma cell line treated with palmitic acid (PA) and their miRNA profiles examined by microarray. The human hepatic stellate cell (HSC) line (LX-2) was then treated with exosome isolated from hepatocytes...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28623141/sirtuin-7-dependent-deacetylation-of-ddb1-regulates-the-expression-of-nuclear-receptor-tr4
#12
Md Fazlul Karim, Tatsuya Yoshizawa, Shihab U Sobuz, Yoshifumi Sato, Kazuya Yamagata
Sirtuin 7 (SIRT7) is an NAD(+)-dependent deacetylase/deacylase, but only a limited number of SIRT7 substrates have been identified. Recently, we found that Sirt7 knockout mice are resistant to high-fat diet-induced fatty liver, and that SIRT7 positively regulates the protein level of TR4, a nuclear receptor involved in lipid metabolism, by inhibiting the CUL4B/DDB1/DCAF1 E3 ubiquitin ligase complex. However, the mechanism by which SIRT7 inhibits the E3 ubiquitin ligase complex was not identified. Here, we demonstrate that SIRT7 binds directly to DDB1 and deacetylates DDB1 at Lys1121...
June 13, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28619997/cardiotonic-steroids-stimulate-macrophage-inflammatory-responses-through-a-pathway-involving-cd36-tlr4-and-na-k-atpase
#13
Yiliang Chen, Wenxin Huang, Moua Yang, Gang Xin, Weiguo Cui, Zijian Xie, Roy L Silverstein
OBJECTIVE: Circulating levels of cardiotonic steroids (CTS) are elevated in various chronic inflammatory conditions, but the role of CTS in inflammation remains largely unknown. We have previously shown that the CTS ouabain stimulates proinflammatory responses in murine macrophages. In this study, we aim to explore the mechanism how CTS induce proinflammatory responses in primary murine and human macrophages. APPROACH AND RESULTS: Using both murine peritoneal macrophages and human monocyte-derived macrophages, we demonstrated that ouabain activated NF-κB, leading to proinflammatory cytokine (eg, MCP-1, tumor necrosis factor-α, interleukin-1β, and interleukin-6) production...
June 15, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28611394/identification-of-the-ectoenzyme-cd38-as-a-marker-of-committed-preadipocytes
#14
A Carrière, Y Jeanson, J-A Côté, C Dromard, A Galinier, S Menzel, C Barreau, S Dupuis-Coronas, E Arnaud, A Girousse, V Cuminetti, J Paupert, B Cousin, C Sengenes, F Koch-Nolte, A Tchernof, L Casteilla
BACKGROUND/OBJECTIVES: Characterization of the adipocyte cellular lineage is required for a better understanding of white adipose tissue homeostasis and expansion. While several studies have focused on the phenotype of the most immature adipocyte progenitors, very few tools exist to identify committed cells. In haematopoiesis, the CD38 ectoenzyme is largely used to delineate various stages of stem cell lineage commitment. We hypothesize that this marker could be used to identify committed preadipocytes...
June 14, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28609285/expression-of-genes-encoding-igfbps-snark-cd36-and-pecam1-in-the-liver-of-mice-treated-with-chromium-disilicide-and-titanium-nitride-nanoparticles
#15
Dmytro O Minchenko, D O Tsymbal, O P Yavorovsky, N V Solokha, O H Minchenko
OBJECTIVE: The aim of the present study was to examine the effect of chromium disilicide and titanium nitride nanoparticles on the expression level of genes encoding important regulatory factors (IGFBP1, IGFBP2, IGFBP3, IGFBP4, IGFBP5, SNARK/NUAK2, CD36, and PECAM1/CD31) in mouse liver for evaluation of possible toxic effects of these nanoparticles. METHODS: Male mice received 20 mg chromium disilicide nanoparticles (45 nm) and titanium nitride nanoparticles (20 nm) with food every working day for 2 months...
April 25, 2017: Endocrine Regulations
https://www.readbyqxmd.com/read/28602913/trpv4-calcium-permeable-channel-is-a-novel-regulator-of-oxidized-ldl-induced-macrophage-foam-cell-formation
#16
Rishov Goswami, Michael Merth, Shweta Sharma, Mazen O Alharbi, Helim Aranda-Espinoza, Xiaoping Zhu, Shaik O Rahaman
Cardiovascular disease is the number one cause of death in United States, and atherosclerosis, a chronic inflammatory arterial disease, is the most dominant underlying pathology. Macrophages are thought to orchestrate atherosclerosis by generating lipid-laden foam cells and by secreting inflammatory mediators. Emerging data support a role for a mechanical factor, e.g., matrix stiffness, in regulation of macrophage function, vascular elasticity, and atherogenesis. However, the identity of the plasma membrane mechanosensor and the mechanisms by which pro-atherogenic signals are transduced/maintained are unknown...
June 8, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28599882/saponins-from-stems-and-leaves-of-panax-ginseng-prevent-obesity-via-regulating-thermogenesis-lipogenesis-and-lipolysis-in-high-fat-diet-induced-obese-c57bl-6-mice
#17
Guilin Chen, Haijun Li, Yan Zhao, Hongyan Zhu, Enbo Cai, Yugang Gao, Shuangli Liu, He Yang, Lianxue Zhang
In this study, high-fat diet (HFD)-induced obesity in mouse model was used to evaluate the dietary effect of saponins from stems and leaves of Panax ginseng (SLG), and to explore its mechanism of action in producing anti-obesity effects. The results indicate that SLG showed significant anti-obesity effects in diet-induced obese mice, represented by decreased serum levels of free fatty acids (FFA), total cholesterol (TC), triglycerides (TG), low-density lipoprotein (LDL)-cholesterol, glucose, leptin and insulin, as well as a reduction in overall body and liver weight, epididymal adipose tissue weight, and food efficiency, and inhibition of abnormal increases in acyl carnitine levels normally caused by an HFD...
June 7, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28598597/azapeptide-synthesis-methods-for-expanding-side-chain-diversity-for-biomedical-applications
#18
Ramesh Chingle, Caroline Proulx, William D Lubell
Mimicry of bioactive conformations is critical for peptide-based medicinal chemistry because such peptidomimetics may augment stability, enhance affinity, and increase specificity. Azapeptides are peptidomimetics in which the α-carbon(s) of one or more amino acid residues are substituted by nitrogen. The resulting semicarbazide analogues have been shown to reinforce β-turn conformation through the combination of lone pair-lone pair repulsion of the adjacent hydrazine nitrogen and urea planarity. Substitution of a semicarbazide for an amino amide residue in a peptide may retain biological activity and add benefits such as improved metabolic stability...
June 9, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28596372/human-blood-monocyte-subsets-a-new-gating-strategy-defined-using-cell-surface-markers-identified-by-mass-cytometry
#19
Graham D Thomas, Anouk A J Hamers, Catherine Nakao, Paola Marcovecchio, Angela M Taylor, Chantel McSkimming, Anh Tram Nguyen, Coleen A McNamara, Catherine C Hedrick
OBJECTIVE: Human monocyte subsets are defined as classical (CD14(++)CD16(-)), intermediate (CD14(++)CD16(+)), and nonclassical (CD14(+)CD16(+)). Alterations in monocyte subset frequencies are associated with clinical outcomes, including cardiovascular disease, in which circulating intermediate monocytes independently predict cardiovascular events. However, delineating mechanisms of monocyte function is hampered by inconsistent results among studies. APPROACH AND RESULTS: We use cytometry by time-of-flight mass cytometry to profile human monocytes using a panel of 36 cell surface markers...
June 8, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28588000/effect-of-maternal-obesity-on-fetal-growth-and-the-expression-of-placental-fatty-acid-transporters
#20
Kui Ye, Li Li, Dan Zhang, Yi Li, Hai Qing Wang, Han Lin Lai, Chuan Lai Hu
OBJECTIVE: To explore the effects of maternal high-fat diet induced obesity on fetal growth and the expression of placental nutrient transporters. METHODS: Maternal obesity was established in rats by 8 weeks of pre-pregnancy high-fat (HF) diet feeding, while rats in the control group were fed with normal (CON) diet. Diet induced obesity (DIO) rats and diet induced obesity resistant (DIR) rats were selected according to body weight gain over this period. After copulation, the CON rats were divided into two groups: switched to HF diet (CON-HF group) or maintained on the CON diet (CON-CON group)...
June 7, 2017: Journal of Clinical Research in Pediatric Endocrinology
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