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https://www.readbyqxmd.com/read/27921997/comparative-molecular-dynamics-study-of-dimeric-and-monomeric-forms-of-hiv-1-protease-in-ligand-bound-and-unbound-state
#1
Monikaben Padariya, Umesh Kalathiya
Human immunodeficiency virus type 1 protease is a viral-encoded enzyme and it is essential for replication and assembly of the virus. Inactivation of HIV-1 protease causes production of immature, noninfectious viral particles and thus HIV-1 protease is an attractive target in anti-AIDS drug design. In our current work, we performed molecular dynamics (MD) calculations (500 ns) for two different ligands (COM5 - designed in our previous study, and Darunavir) and made effort to understand dynamics behaviour of our designed compound COM5...
December 6, 2016: General Physiology and Biophysics
https://www.readbyqxmd.com/read/27919357/lipid-phenotype-and-heritage-pattern-in-families-with-genetic-hypercholesterolemia-not-related-to-ldlr-apob-pcsk9-or-apoe
#2
Estíbaliz Jarauta, María Rosario Pérez-Ruiz, Sofia Pérez-Calahorra, Rocio Mateo-Gallego, Ana Cenarro, Montserrat Cofán, Emilio Ros, Fernando Civeira, Maria Teresa Tejedor
BACKGROUND: A substantial proportion of individuals clinically diagnosed as familial hypercholesterolemia (FH) do not carry pathogenic mutations in candidate genes. Whether in them the high cholesterol trait is transmitted monogenically has not been studied. OBJECTIVES: We assessed the inheritance pattern, penetrance, and expression of high low-density lipoprotein (LDL)-cholesterol (LDLc) in families with genetic hypercholesterolemia (GH) without known causative mutations (non-FH-GH)...
November 2016: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/27919352/impact-of-a-1-year-lifestyle-modification-program-on-plasma-lipoprotein-and-pcsk9-concentrations-in-patients-with-coronary-artery-disease
#3
Marjorie Boyer, Valérie Lévesque, Paul Poirier, André Marette, Patrick Mathieu, Jean-Pierre Després, Éric Larose, Benoit J Arsenault
BACKGROUND: Patients with coronary artery disease (CAD) are characterized by an impaired cardiometabolic risk profile including high levels of atherogenic apolipoprotein (apo) B-containing lipoprotein levels. Genetic studies have highlighted a critical role for proprotein convertase subtilisin/kexin type 9 (PCSK9) in lipoprotein metabolism and CAD risk. OBJECTIVE: To determine whether improving dietary quality and increasing physical activity levels improve parameters of the cardiometabolic risk profile such as plasma apoB and PCSK9 levels in patients with CAD...
November 2016: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/27919301/the-integration-of-epigenetics-and-genetics-in-nutrition-research-for-cvd-risk-factors
#4
Yiyi Ma, Jose M Ordovas
There is increasing evidence documenting gene-by-environment (G × E) interactions for CVD related traits. However, the underlying mechanisms are still unclear. DNA methylation may represent one of such potential mechanisms. The objective of this review paper is to summarise the current evidence supporting the interplay among DNA methylation, genetic variants, and environmental factors, specifically (1) the association between SNP and DNA methylation; (2) the role that DNA methylation plays in G × E interactions...
December 6, 2016: Proceedings of the Nutrition Society
https://www.readbyqxmd.com/read/27918234/formation-and-exudation-of-non-volatile-products-of-the-arabidiol-triterpenoid-degradation-pathway-in-arabidopsis-roots
#5
Reza Sohrabi, Tehane Ali, Liva Harinantenaina Rakotondraibe, Dorothea Tholl
Triterpenoids produced by plants play important roles in the protection against biotic stress. Roots of Arabidopsis thaliana produce different triterpenoids, which include the tricyclic triterpene diol, arabidiol. In a degradation reaction induced by infection with the oomycete pathogen, Pythium irregulare, arabidiol is cleaved to the 11-carbon volatile homoterpene, (E)-4,8-dimethyl-1,3,7-nonatriene (DMNT), and the 19-carbon ketone, apo-arabidiol. The arabidiol pathway and its volatile breakdown product DMNT have been implicated in the defense against P...
December 5, 2016: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/27917464/relation-of-dysglycemia-to-structural-brain-changes-in-a-multiethnic-elderly-cohort
#6
Christiane Reitz, Vanessa A Guzman, Atul Narkhede, Charles DeCarli, Adam M Brickman, José A Luchsinger
OBJECTIVES: Abnormally high glucose levels (dysglycemia) increase with age. Epidemiological studies suggest that dysglycemia is a risk factor for cognitive impairment but the underlying pathophysiological mechanisms remain unclear. The objective of this study was to examine the relation of dysglycemia clinical categories (normal glucose tolerance (NGT), pre-diabetes, undiagnosed diabetes, known diabetes) with brain structure in older adults. We also assessed the relation between dysglycemia and cognitive performance...
December 5, 2016: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/27917297/an-intrinsic-agonist-mechanism-for-activation-of-glucagon-like-peptide-1-receptor-by-its-extracellular-domain
#7
Yanting Yin, X Edward Zhou, Li Hou, Li-Hua Zhao, Bo Liu, Gaihong Wang, Yi Jiang, Karsten Melcher, H Eric Xu
The glucagon-like peptide-1 receptor is a class B G protein coupled receptor (GPCR) that plays key roles in glucose metabolism and is a major therapeutic target for diabetes. The classic two-domain model for class B GPCR activation proposes that the apo-state receptor is auto-inhibited by its extracellular domain, which physically interacts with the transmembrane domain. The binding of the C-terminus of the peptide hormone to the extracellular domain allows the N-terminus of the hormone to insert into the transmembrane domain to induce receptor activation...
2016: Cell Discovery
https://www.readbyqxmd.com/read/27917221/the-influence-of-apoe-genotype-on-the-lipid-profile-and-lipoproteins-during-normal-pregnancy-in-a-southern-african-population
#8
Donald Moshen Tanyanyiwa, Adrian David Marais, Pamela Byrnes, Sheena Jones
BACKGROUND: Pregnancy is associated with increases in fasting triglycerides and total cholesterol.1 ApoE isoforms are known to influence the concentration of cholesterol, with apoE2 homozygosity lowering and apoE4 homozygosity raising the cholesterol concentration compared with E3 homozygosity.2 The lipid profiles ApoE status and prevalence of small dense LDL species were evaluated for subjects attending an antenatal clinic. RESULTS: Samples from 690 women aged between 16 and 42 years of age were analyzed during and after pregnancy...
September 2016: African Health Sciences
https://www.readbyqxmd.com/read/27916520/water-bridge-mediates-recognition-of-mrna-cap-in-eif4e
#9
Dilraj Lama, Mohan R Pradhan, Christopher J Brown, Rohan S Eapen, Thomas L Joseph, Chee-Keong Kwoh, David P Lane, Chandra S Verma
Ligand binding pockets in proteins contain water molecules, which play important roles in modulating protein-ligand interactions. Available crystallographic data for the 5' mRNA cap-binding pocket of the translation initiation factor protein eIF4E shows several structurally conserved waters, which also persist in molecular dynamics simulations. These waters engage an intricate hydrogen-bond network between the cap and protein. Two crystallographic waters in the cleft of the pocket show a high degree of conservation and bridge two residues, which are part of an evolutionarily conserved scaffold...
November 24, 2016: Structure
https://www.readbyqxmd.com/read/27915184/anti-atherosclerotic-effects-of-pravastatin-in-brachiocephalic-artery-in-comparison-with-en-face-aorta-and-aortic-roots-in-apoe-ldlr-mice
#10
Renata B Kostogrys, Magdalena Franczyk-Zarow, Marlena Gasior-Glogowska, Edyta Kus, Agnieszka Jasztal, Tomasz P Wrobel, Malgorzata Baranska, Izabela Czyzynska-Cichon, Anna Drahun, Angelika Manterys, Stefan Chlopicki
BACKGROUND: Cholesterol-dependent and independent mechanisms were proposed to explain anti-atherosclerotic action of statins in humans. However, their effects in murine models of atherosclerosis have not been consistently demonstrated. Here, we studied the effects of pravastatin on atherosclerosis in ApoE/LDLR(-/-) mice fed a control and atherogenic diet. METHODS: ApoE/LDLR(-/-) mice were fed a control (CHOW) or an atherogenic (Low Carbohydrate High Protein, LCHP) diet...
September 17, 2016: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/27914062/computational-design-of-ligand-binding-proteins
#11
Christine E Tinberg, Sagar D Khare
The ability to design novel small-molecule binding sites in proteins is a stringent test of our understanding of the principles of molecular recognition, and would have many practical applications, in synthetic biology and medicine. Here, we describe a computational method in the context of the macromolecular modeling suite Rosetta to designing proteins with sites featuring predetermined interactions to ligands of choice. The required inputs for the method are a model of the small molecule and the desired interactions (e...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27914033/l-carnitine-simvastatin-reduces-lipoprotein-a-levels-compared-with-simvastatin-monotherapy-a-randomized-double-blind-placebo-controlled-study
#12
M Florentin, M S Elisaf, C V Rizos, V Nikolaou, E Bilianou, C Pitsavos, E N Liberopoulos
Lipoprotein (a) [Lp(a)] is an independent risk factor for cardiovascular disease. There are currently limited therapeutic options to lower Lp(a) levels. L-Carnitine has been reported to reduce Lp(a) levels. The aim of this study was to compare the effect of L-carnitine/simvastatin co-administration with that of simvastatin monotherapy on Lp(a) levels in subjects with mixed hyperlipidemia and elevated Lp(a) concentration. Subjects with levels of low-density lipoprotein cholesterol (LDL-C) >160 mg/dL, triacylglycerol (TAG) >150 mg/dL and Lp(a) >20 mg/dL were included in this study...
December 2, 2016: Lipids
https://www.readbyqxmd.com/read/27912196/nox-isoforms-in-the-development-of-abdominal-aortic-aneurysm
#13
Kin Lung Siu, Qiang Li, Yixuan Zhang, Jun Guo, Ji Youn Youn, Jie Du, Hua Cai
Oxidative stress plays an important role in the formation of abdominal aortic aneurysm (AAA), and we have recently established a causal role of uncoupled eNOS in this severe human disease. We have also shown that activation of NADPH oxidase (NOX) lies upstream of uncoupled eNOS. Therefore, identification of the specific NOX isoforms that are required for eNOS uncoupling and AAA formation would ultimately lead to novel therapies for AAA. In the present study, we used the Ang II infused hph-1 mice to examine the roles of NOX isoforms in the development of AAA...
November 19, 2016: Redox Biology
https://www.readbyqxmd.com/read/27911314/updating-the-evidence-on-the-association-between-serum-cholesterol-and-risk-of%C3%A2-late-life-dementia-review-and%C3%A2-meta-analysis
#14
Kaarin J Anstey, Kimberly Ashby-Mitchell, Ruth Peters
BACKGROUND: Cohort studies have reported that midlife high total serum cholesterol (TC) is associated with increased risk of Alzheimer's disease (AD) in late-life but findings have been based on few studies and previous reviews have been limited by a lack of compatible data. OBJECTIVE: We synthesized all high quality data from cohort studies reporting on the association between total serum cholesterol measured and late-life cognitive outcomes including Alzheimer's disease (AD), vascular dementia (VaD), any dementia, mild cognitive impairment (MCI), and cognitive decline...
November 29, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27911306/cortical-thickness-and-microstructural-white-matter-changes-detect-amnestic-mild-cognitive-impairment
#15
Zan Wang, Zhengjia Dai, Hao Shu, Duan Liu, Qihao Guo, Yong He, Zhijun Zhang
Both the apolipoprotein E (APOE) ɛ4 allele and amnestic mild cognitive impairment (aMCI) are considered to be risk factors for Alzheimer's disease (AD). The primary aim of this study was to determine whether the aMCI-related abnormality in gray matter (GM) cortical thickness and white matter (WM) tracts integrity would be modified by the APOE genotype. A total of 146 older adults, including 64 aMCI patients (28 ɛ4 carriers and 36 non-carriers) and 82 healthy controls (39 ɛ4 carriers and 43 non-carriers), underwent a standardized clinical interview, neuropsychological battery assessment, and multi-modal brain magnetic resonance imaging scans...
November 29, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27911297/sample-size-estimation-for-alzheimer-s-disease-trials-from-japanese-adni-serial-magnetic-resonance-imaging
#16
Motonobu Fujishima, Atsushi Kawaguchi, Norihide Maikusa, Ryozo Kuwano, Takeshi Iwatsubo, Hiroshi Matsuda
BACKGROUND: Little is known about the sample sizes required for clinical trials of Alzheimer's disease (AD)-modifying treatments using atrophy measures from serial brain magnetic resonance imaging (MRI) in the Japanese population. OBJECTIVE: The primary objective of the present study was to estimate how large a sample size would be needed for future clinical trials for AD-modifying treatments in Japan using atrophy measures of the brain as a surrogate biomarker...
November 28, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27911292/physical-exercise-moderates-the%C3%A2-relationship-of-apolipoprotein-e-apoe-%C3%A2-genotype-and-dementia-risk-a%C3%A2-population-based-study
#17
Barbara Fenesi, Hanna Fang, Ana Kovacevic, Mark Oremus, Parminder Raina, Jennifer J Heisz
Genetics and lifestyle independently determine dementia risk, but the interaction is unclear. We assessed the interactive relationship of apolipoprotein E (APOE) genotype and physical exercise on dementia risk over a 5-year period in 1,646 older adults from the Canadian Study of Health and Aging who were dementia-free at baseline. Physical exercise moderated the relationship between genotype and dementia (p < 0.01). Specifically, for APOE ɛ4 non-carriers, the odds of developing dementia were higher in non-exercisers than exercisers (OR = 1...
November 29, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27911290/rare-genetic-variant-in-sorl1-may-increase-penetrance-of-alzheimer-s-disease-in-a-family-with-several-generations-of-apoe-%C3%A9-4-homozygosity
#18
Eva Louwersheimer, Petra E Cohn-Hokke, Yolande A L Pijnenburg, Marjan M Weiss, Erik A Sistermans, Annemieke J Rozemuller, Marc Hulsman, John C van Swieten, Cock M van Duijn, Frederik Barkhof, Teddy Koene, Philip Scheltens, Wiesje M Van der Flier, Henne Holstege
BACKGROUND: The major genetic risk factor for late onset Alzheimer's disease (AD) is the APOE-ɛ4 allele. However, APOE-ɛ4 homozygosity is not fully penetrant, suggesting co-occurrence of additional genetic variants. OBJECTIVE: To identify genetic factors that, next to APOE-ɛ4 homozygosity, contribute to the development of AD. METHODS: We identified a family with nine AD patients spanning four generations, with an inheritance pattern suggestive of autosomal dominant AD, with no variants in PSEN1, PSEN2, or APP...
November 28, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27909048/the-ph-dependence-of-saccharides-influence-on-thermal-denaturation-of-two-model-proteins-supports-an-excluded-volume-model-for-stabilization-generalized-to-allow-for-intramolecular-electrostatic-interactions
#19
Ilyas Beg, Allen P Minton, Asimul Islam, Md Imtaiyaz Hassan, Faizan Ahmad
The reversible thermal denaturation of apo alpha-lactalbumin and lysozyme was measured in the absence and presence of multiple concentrations of each of seven saccharides (glucose, galactose, fructose, sucrose, trehalose, raffinose and stachyose) at multiple pH values. It was observed that with increasing pH, the absolute stability of alpha-lactalbumin decreased while the stabilizing effect per mole of all saccharides increased, and that the absolute stability of lysozyme increased, while the stabilizing effect per mole of all saccharides decreased...
December 1, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27908893/tracking-monocyte-recruitment-and-macrophage-accumulation-in-atherosclerotic-plaque-progression-using-a-novel-hcd68gfp-apoe-reporter-mouse
#20
Eileen McNeill, Asif J Iqbal, Daniel Jones, Jyoti Patel, Patricia Coutinho, Lewis Taylor, David R Greaves, Keith M Channon
OBJECTIVE: To create a model of atherosclerosis using green fluorescent protein (GFP)-targeted monocytes/macrophages, allowing analysis of both endogenous GFP(+) and adoptively transferred GFP(+) myeloid cells in arterial inflammation. APPROACH AND RESULTS: hCD68GFP reporter mice were crossed with ApoE(-/-) mice. Expression of GFP was localized to macrophages in atherosclerotic plaques and in angiotensin II-induced aortic aneurysms and correlated with galectin 3 and mCD68 expression. Flow cytometry confirmed GFP(+) expression in CD11b(+)/CD64(+), CD11c(+)/MHC-II(HI), and CD11b(+)/F4/80(+) myeloid cells...
December 1, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
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