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https://www.readbyqxmd.com/read/28811527/atherosusceptible-shear-stress-activates-endoplasmic-reticulum-stress-to-promote-endothelial-inflammation
#1
Keith A Bailey, Fawaz G Haj, Scott I Simon, Anthony G Passerini
Atherosclerosis impacts arteries where disturbed blood flow renders the endothelium susceptible to inflammation. Cytokine activation of endothelial cells (EC) upregulates VCAM-1 receptors that target monocyte recruitment to atherosusceptible regions. Endoplasmic reticulum (ER) stress elicits EC dysregulation in metabolic syndrome. We hypothesized that ER plays a central role in mechanosensing of atherosusceptible shear stress (SS) by signaling enhanced inflammation. Aortic EC were stimulated with low-dose TNFα (0...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811304/selectin-catch-bonds-mechanotransduce-integrin-activation-and-neutrophil-arrest-on-inflamed-endothelium-under-shear-flow
#2
Vasilios A Morikis, Shannon Chase, Ted Wun, Elliot L Chaikof, John L Magnani, Scott I Simon
E-selectin extends from the plasma membrane of inflamed endothelium and serves to capture leukocytes from flowing blood via long-lived catch-bonds that support slow leukocyte rolling under shear stress. Its ligands are glycosylated with the tetrasaccharide sialyl Lewis(x) (sLe(x)), which contributes to bond affinity and specificity. E-selectin mediated rolling transmits signals into neutrophils that triggers activation of high-affinity β2-integrins necessary for transition to shear resistant adhesion and transendothelial migration...
August 15, 2017: Blood
https://www.readbyqxmd.com/read/28808397/genistein-attenuated-gastric-injury-on-indomethacin-induced-gastropathy-in-rats
#3
Sarocha Vivatvakin, Duangporn Werawatganon, Kanjana Somanawat, Naruemon Klaikeaw, Prasong Siriviriyakul
OBJECTIVES: To investigates the mucoprotective effect of genistein on gastric injury in rats with indomethacin (IMN)-induced gastropathy. METHODS: Male Sprague-Dawley rats were randomly divided into three groups. Group 1 (control; n = 6) was given distilled water (DW). Group 2 (IMN; n = 6) was given indomethacin (IMN) 150 mg/kg dissolved in 5% sodium bicarbonate (NaHCO3(-)) 1 mL/rat via intragastric tube at time 0 and 4 h. Group 3 (genistein; n = 6) was given genistein 100 mg/kg dissolved in 0...
July 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28807377/crem-transgene-mice-an-animal-model-of-atrial-fibrillation-and-thrombogenesis
#4
A Bukowska, M Felgendreher, B Scholz, C Wolke, J S Schulte, E Fehrmann, E Wardelmann, M D Seidl, U Lendeckel, K Himmler, A Gardemann, A Goette, F U Müller
BACKGROUND: The molecular pathomechanisms underlying atrial thrombogenesis are multifactorial and still require detailed investigations. Transgenic mice with cardiomyocyte-directed expression of the transcriptional repressor CREM-IbΔC-X (CREM-TG) represent an experimental model of atrial fibrillation (AF) that shows a gradual, age-dependent progression from atrial ectopy to persistent AF. Importantly, this model develops biatrial thrombi. The molecular characteristics related to the thrombogenesis in CREM-TG mice have not been studied, yet...
August 1, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28807051/mesenchymal-stromal-cells-ameliorate-oxidative-stress-induced-islet-endothelium-apoptosis-and-functional-impairment-via-wnt4-%C3%AE-catenin-signaling
#5
Lingshu Wang, Li Qing, He Liu, Na Liu, Jingting Qiao, Chen Cui, Tianyi He, Ruxing Zhao, Fuqiang Liu, Fei Yan, Chuan Wang, Kai Liang, Xinghong Guo, Ying H Shen, Xinguo Hou, Li Chen
BACKGROUND: Islet dysfunction and destruction are the common cause for both type 1 and type 2 diabetes mellitus (T2DM). The islets of Langerhans are highly vascularized miniorgans, and preserving the structural integrity and full function of the microvascular endothelium is vital for protecting the islets from the infiltration of immune cells and secondary inflammatory attack. Mesenchymal stromal cell (MSC)-based therapies have been proven to promote angiogenesis of the islets; however, the underlying mechanism for the protective role of MSCs in the islet endothelium is still vague...
August 14, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28806760/endothelial-activation-and-dysfunction-in-severe-fever-with-thrombocytopenia-syndrome
#6
Xiao-Kun Li, Zhen-Dong Yang, Juan Du, Bo Xing, Ning Cui, Pan-He Zhang, Hao Li, Xiao-Ai Zhang, Qing-Bin Lu, Wei Liu
BACKGROUND: Pathogenesis of severe fever with thrombocytopenia syndrome (SFTS) has not been well described yet. Recent studies indicate that SFTSV could replicate in endothelial cells. Here we performed a case-control study to determine whether endothelial activation/dysfunction occurred in SFTSV infection and to identify the biomarkers reflecting endothelial dysfunction. METHODOLOGY/PRINCIPAL FINDINGS: In a case-control study of 134 SFTS patients and 68 healthy controls, serum levels of plasminogen activator inhibitor 1, tissue plasminogen activator, P-selectin, platelet endothelial cell adhesion molecular, CD40 ligand, E-selectin, vascular endothelial growth factor A, serum amyloid antigen 1 (SAA-1) and vascular cell adhesion molecular 1 were significantly enhanced in the patients than the controls (all P<0...
August 14, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28802579/atorvastatin-prevents-endothelial-dysfunction-in-high-glucose-condition-through-skp2-mediated-degradation-of-foxo1-and-icam-1
#7
Jonghanne Park, Injoo Hwang, Sung-Jean Kim, Seock-Won Youn, Jin Hur, Hyo-Soo Kim
OBJECTIVE: The 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitor atorvastatin has been reported to exert vasculo-protective action in diabetes. We investigated the vasculo-protective mechanism of atorvastatin by evaluating its effect on two major pathogenic molecules, FOXO1 and ICAM1, mediated by S-phase kinase-associated protein 2 (Skp2) in diabetic endothelial dysfunction. APPROACH AND RESULTS: [1] FOXO1: Hyperglycemic condition increased FOXO1 protein level in endothelial cells, which was reversed by atorvastatin...
August 9, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28798776/protective-effects-of-chronic-intermittent-hypobaric-hypoxia-pretreatment-against-aplastic-anemia-through-improving-the-adhesiveness-and-stress-of-mesenchymal-stem-cells-in-rats
#8
Jing Yang, Li Zhang, Handong Wang, Zan Guo, Yixian Liu, Yi Zhang, Chuan Wang, Quanhai Li
Aplastic anemia (AA) is a common malignant blood disease, and chronic intermittent hypobaric hypoxia (CIHH) has a beneficial effect against different diseases. The aim of the present study was to investigate the protective effect of CIHH against AA and underlying mechanisms. 5-Fluorouracil and busulfan treatment induced AA model in rats with reduction of hematological parameters and bone marrow tissue injury and decrease of the colony numbers of progenitor cells. CIHH pretreatment significantly reduced the incidence rate of AA and alleviated above symptoms in AA model...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28798687/tet2-protects-against-oxldl-induced-huvec-dysfunction-by-upregulating-the-cse-h2s-system
#9
Juan Peng, Zhi-Han Tang, Zhong Ren, Bei He, Yun Zeng, Lu-Shan Liu, Zuo Wang, Dang-Heng Wei, Xi-Long Zheng, Zhi-Sheng Jiang
Ten-eleven translocation-2 (TET2) protein is a DNA demethylase that regulates gene expression through DNA demethylation and also plays important roles in various diseases including atherosclerosis. Endothelial dysfunction represents an early key event in atherosclerotic disease. The cystathionine-γ-lyase (CSE)/hydrogen sulfide (H2S) is a key endogenous system with protective effects on endothelial functions. In this study, we examined how TET2 regulates oxidized low-density lipoprotein (oxLDL)-induced dysfunction of human umbilical vein endothelial cells (HUVECs) and determined the role of the CSE/H2S system...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28797776/increase-in-seizure-susceptibility-in-sepsis-like-condition-explained-by-spiking-cytokines-and-altered-adhesion-molecules-level-with-impaired-blood-brain-barrier-integrity-in-experimental-model-of-rats-treated-with-lipopolysaccharides
#10
Rakesh K Sewal, Manish Modi, Uma Nahar Saikia, Amitava Chakrabarti, Bikash Medhi
BACKGROUND AND OBJECTIVE: Epilepsy is a neurological disorder characterized by recurrent unprovoked seizures. Sepsis is a condition which initiates a cascade of a surge of inflammatory mediators. Interplay between seizures and inflammation other than of brain origin is yet to be explored. The present study was designed to evaluate the seizure susceptibility in experimental models of lipopolysaccharide (LPS) induced sepsis. DESIGN AND METHODS: Experimental sepsis was induced using lipopolysaccharides in Wistar rats...
June 15, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28797761/tail-vein-injection-of-mmldl-upregulates-mouse-mesenteric-artery-etb-receptors-via-activation-of-the-erk1-2-pathway
#11
Yang Liu, Xiao-Lan Chen, Cang-Bao Xu, Lei Cao, Jie Lin, Gen Chen, Jie Li
Minimally modified low density lipoprotein (mmLDL) is a risk factor for cardiovascular disease. This study investigated the effect of mmLDL on mouse mesenteric artery endothelin type B (ETB) receptors and its molecular mechanism. Mice were injected with normal saline (NS group), mmLDL in the tail vein (mmLDL group), or with both mmLDL and an intraperitoneal injection of the ERK1/2 pathway-specific inhibitor U0126 (mmLDL+U0126 group). The dose-response curve of mesenteric artery contraction induced by sarafotoxin 6c (S6c), the ETB receptor agonist, was measured using a sensitive myograph system...
August 7, 2017: Vascular Pharmacology
https://www.readbyqxmd.com/read/28796044/clinical-significance-of-costimulatory-molecules-cd40-cd40l-and-cd134-cd134l-in-coronary-heart-disease-a-case-control-study
#12
Jun Chen, Jian-Hao Li, Shan-Jun Zhao, Da-Yu Wang, Wen-Zhu Zhang, Wei-Jie Liang
The aim of the study was to evaluate the potential role of CD40/CD40 ligand (CD40L) and CD134/CD134 ligand (CD134L) in the development of coronary heart disease (CHD) via the performance of a case-control study.The research objects were 234 cases of CHD patients and 120 cases of well-matched normal controls. Following the separation of peripheral blood mononuclear cells (PBMCs), real-time quantitative PCR (qRT-PCR), Western blot, immunohistochemistry, and flow cytometry were applied for the detection of mRNA levels and expression levels of CD40/CD40L and CD134/CD134L; meanwhile, intercellular adhesion molecule-1 (ICAM-1) and Fas protein mRNA levels were detected using qRT-PCR...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28791821/il-22-modulates-inflammatory-properties-of-human-primary-aortic-smooth-muscle-cells
#13
Paulina Gorzelak-Pabis, Maciej Chałubiński, Katarzyna Wojdan, Emilia Łuczak, Maciej Borowiec, Marlena Broncel
BACKGROUND: IL-22 is expressed at barrier surfaces, which suggests its critical role in the maintenance of normal barrier homeostasis and tissue repair. IL-22 can both promote pathological inflammation and prevent the destruction of tissues. The functional outcomes of IL-22 on vascular smooth muscle cells, which are shown to regulate immune processes within the vascular wall and which are involved in certain pathologies, have not been analyzed. OBJECTIVES: The effect of IL-22 on the expression of novel antiand pro-inflammatory and barrier disrupting cytokines, apoptosis and the expression of adhesive molecules in human primary aortic smooth muscle cells (AoSMC) was investigated...
May 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28791379/felodipine-inhibits-ox-ldl-induced-reactive-oxygen-species-production-and-inflammation-in-human-umbilical-vein-endothelial-cells
#14
Jie Qi, Jian-Bao Zheng, Wen-Ting Ai, Xiao-Wei Yao, Lei Liang, Gong Cheng, Xi-Ling Shou, Chao-Feng Sun
Oxidative stress and inflammation are involved in the pathogenesis of atherosclerosis. Calcium channel blockers (CCBs) inhibit the development of atherosclerosis, although the underlying molecular basis has not been completely elucidated. The present study was designed to investigate the effects of felodipine, a CCB, on inflammation and oxidative stress in human umbilical vein endothelial cells (HUVECs) and to examine the underlying mechanisms of action. Oxidized low‑density lipoprotein (ox‑LDL) was used to induce an inflammatory response in HUVECs...
August 7, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28782505/chronic-pesticide-exposure-and-consequential-keratectasia-corneal-neovascularisation
#15
Shalini Sanyal, Atrayo Law, Sujata Law
Ocular toxicity as a consequence of chronic pesticide exposure is one of the health hazards caused due to extended exposure to pesticides. The cornea, due to its position as the outer ocular layer and its role in protecting the internal layers of the eye; is gravely affected by this xenobiotic insult to the eye, leading to ocular irritation and damage to normal vision. The deleterious effects of chronic pesticide exposure on the various corneal layers and the ocular risks involved therein, were explored by mimicking the on-field scenario...
August 4, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28777499/alg13-cdg-in-a-male-with-seizures-normal-cognitive-development-and-normal-transferrin-isoelectric-focusing
#16
Therese E Gadomski, Melody Bolton, Majid Alfadhel, Chris Dvorak, Olalekan A Ogunsakin, Stephen L Nelson, Eva Morava
ALG13-CDG has been recently discovered as a disorder of severe developmental, intellectual and speech disability, microcephaly, visual abnormalities, seizures, hepatomegaly, coagulation abnormalities, and abnormal serumtransferrin isoelectric focusing in serum. A male with seizures, delayed motor, and speech development, but normal cognition carried a hemizygous, predicted pathogenic ALG13 variant (p.E463G). N-glycosylation studies in plasma were normal. ICAM-1 expression was decreased in patient fibroblasts, supporting the variant's pathogenicity...
August 4, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28777298/the-sglt2-inhibitor-luseogliflozin-rapidly-normalizes-aortic-mrna-levels-of-inflammation-related-but-not-lipid-metabolism-related-genes-and-suppresses-atherosclerosis-in-diabetic-apoe-ko-mice
#17
Yusuke Nakatsu, Hiroki Kokubo, Batmunkh Bumdelger, Masao Yoshizumi, Takeshi Yamamotoya, Yasuka Matsunaga, Koji Ueda, Yuki Inoue, Masa-Ki Inoue, Midori Fujishiro, Akifumi Kushiyama, Hiraku Ono, Hideyuki Sakoda, Tomoichiro Asano
Recent clinical studies have revealed the treatment of diabetic patients with sodium glucose co-transporter2 (SGLT2) inhibitors to reduce the incidence of cardiovascular events. Using nicotinamide and streptozotocin (NA/STZ) -treated ApoE KO mice, we investigated the effects of short-term (seven days) treatment with the SGLT2 inhibitor luseogliflozin on mRNA levels related to atherosclerosis in the aorta, as well as examining the long-term (six months) effects on atherosclerosis development. Eight-week-old ApoE KO mice were treated with NA/STZ to induce diabetes mellitus, and then divided into two groups, either untreated, or treated with luseogliflozin...
August 4, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28772214/epigallocatechin-3-gallate-protects-against-diabetic-cardiomyopathy-through-modulating-the-cardiometabolic-risk-factors-oxidative-stress-inflammation-cell-death-and-fibrosis-in-streptozotocin-nicotinamide-induced-diabetic-rats
#18
Azza I Othman, Mamdouh R El-Sawi, Mohamed A El-Missiry, Mohammad H Abukhalil
The potential protective effect of epigallocatechin-3-gallate (EGCG) on type 2 diabetes-induced heart injury was investigated. A rat model of diabetes was achieved by injection of nicotinamide (100mg/kg, i.p), 20min before the administration of streptozotocin (55mg/kg, i.p.). After confirmation of diabetes, EGCG (2mg/kg, p.o.) was administrated on alternate days for one month. Treatment of diabetic rats with EGCG showed a remarkable reduction in glucose, glycosylated hemoglobin, HOMA-IR and lipid profile levels with an elevation in insulin levels, indicating its antihyperglycemic and antidyslipidemic actions...
July 31, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28762564/capsaicin-induced-rapid-neutrophil-leukocyte-activation-in-the-rat-urinary-bladder-microcirculatory-bed
#19
Péter Járomi, Dénes Garab, Petra Hartmann, Dóra Bodnár, Sándor Nyíri, Péter Sántha, Mihály Boros, Gábor Jancsó, Andrea Szabó
AIMS: This study was initiated to investigate the involvement of neutrophil leukocyte activation in neurogenic inflammation, a process also involved in human urinary pathologies, elicited in the rat urinary bladder by the local administration of capsaicin, the archetypal TRPV1 agonist. The contribution of afferent nerves and sensory neuropeptides to leukocyte activation in the urinary bladder microcirculatory bed was examined. METHODS: Following a 15-min topical application of capsaicin (50 μM), leukocyte-endothelial interactions were examined for an observation period of 45 min with intravital microscopy...
August 1, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28762547/correlation-of-inflammatory-mediators-in-prostatic-secretion-with-chronic-prostatitis-and-chronic-pelvic-pain-syndrome
#20
T R Huang, W Li, B Peng
Chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS) is a common clinical syndrome, and the mechanisms underlying the relationship between CP/CPPS and ED are still unclear. This study aimed to investigate the differential expression of 40 inflammatory mediators in patients with CP/CPPS and to demonstrate whether these mediators related to the severity of erectile function. Eighty cases of patients with CP/CPPS were selected, including 40 cases of IIIA and 40 cases of IIIB, with 20 cases of healthy men as controls...
August 1, 2017: Andrologia
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