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https://www.readbyqxmd.com/read/28709869/protective-effect-of-bacillopeptidase-cfr5-from-bacillus-subtilis-cfr5-on-cerulein-induced-pancreatitis
#1
G R Sharmila, G Venkateswaran
Bacillopeptidase is a serine peptidase, known for its fibrinolytic activity. However, a very little information is known about its in vivo inflammatory and/or anti-inflammatory properties. Thus, to understand whether bacillopeptidase incorporation can regulate pancreatitis or not, the cerulein-induced pancreatitis model was used, and the role of bacillopeptidase on pancreatitis was studied. In this study, 46 kDa protein was purified from Bacillus subtilis and identified as bacillopeptidase CFR5 (BPC) through MS/MS analysis...
July 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28709158/dexmedetomidine-protects-against-multi-organ-dysfunction-induced-by-heatstroke-via-sustaining-the-intestinal-integrity
#2
Zhen-Na Xia, Ying Zong, Zi-Teng Zhang, Ji-Kuai Chen, Xiu-Juan Ma, Yan-Gang Liu, Li-Jun Zhao, Guo-Cai Lu
Previous studies have indicated that gut-derived endotoxin played a pivotal role for aggravating systemic inflammatory response to multi-organ dysfunction under heatstroke. Dexmedetomidine (DEX) could protect against inflammation and multi-organ injury in various scenarios. The aim of this study was to explore the protective effect of DEX on heatstroke and the mechanism involved. Male C57BL/6 mice were placed in a controlled climate chamber (40 ± 1°C) until the maximum core temperature (Tc, Max) of 42...
August 2017: Shock
https://www.readbyqxmd.com/read/28704517/zinc-oxide-nanoparticles-as-a-substitute-for-zinc-oxide-or-colistin-sulfate-effects-on-growth-serum-enzymes-zinc-deposition-intestinal-morphology-and-epithelial-barrier-in-weaned-piglets
#3
Chao Wang, Ligen Zhang, Weipeng Su, Zhixiong Ying, Jintian He, Lili Zhang, Xiang Zhong, Tian Wang
The objective of this study was to evaluate effects of zinc oxide nanoparticles (nano-ZnOs) as a substitute for colistin sulfate (CS) and/or zinc oxide (ZnO) on growth performance, serum enzymes, zinc deposition, intestinal morphology and epithelial barrier in weaned piglets. A total of 216 crossbred Duroc×(Landrace×Yorkshire) piglets weaned at 23 days were randomly assigned into 3 groups, which were fed with basal diets supplemented with 20 mg/kg CS (CS group), 20mg/kg CS+3000 mg/kg ZnO (CS+ZnO group), and 1200 mg/kg nano-ZnOs (nano-ZnO group) for 14 days...
2017: PloS One
https://www.readbyqxmd.com/read/28701916/the-role-of-hotair-mir-148b-3p-usf1-on-regulating-the-permeability-of-btb
#4
Libo Sa, Yan Li, Lini Zhao, Yunhui Liu, Ping Wang, Libo Liu, Zhen Li, Jun Ma, Heng Cai, Yixue Xue
Homeobox transcript antisense intergenic RNA (HOTAIR), as a long non-coding RNA (lncRNA), has been considered to play critical roles in the biological properties of various tumors. The purposes of this study were to investigate the role and possible molecular mechanisms of HOTAIR in regulating the permeability of blood tumor barrier (BTB) in vitro. Our present study elucidated that the expressions of HOTAIR and upstream stimulatory factor 1 (USF1) was up-regulated, but miR-148b-3p was down-regulated in glioma microvascular endothelial cells (GECs)...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28699141/epi-perineural-and-schwann-cells-as-well-as-perineural-sheath-integrity-are-affected-following-2-4-d-exposure
#5
Marzieh Sharifi Pasandi, Farshad Hosseini Shirazi, Mohammad Reza Gholami, Hossein Salehi, Nowruz Najafzadeh, Mohammad Mazani, Hatef Ghasemi Hamidabadi, Ali Niapour
2,4-dicholorophenoxy acetic acid (2,4-D) is a worldwide-known hormone herbicide. However, there are increasing concerns about its exposure and risks of developing pathological conditions for the peripheral nervous system. The aim of this study was to investigate the mechanism(s) involved in the toxicity of 2,4-D on peripheral nerve's cellular components. The epi/perineural and Schwann cells and a total of three cell lines were treated with 2,4-D. The viability of cells at different doses of 2,4-D was measured by MTT assay...
July 11, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28698144/inhibiting-glycogen-synthase-kinase-3-and-transforming-growth-factor-%C3%AE-signaling-to-promote-epithelial-transition-of-human-adipose-mesenchymal-stem-cells
#6
Melina Setiawan, Xiao-Wei Tan, Tze-Wei Goh, Gary Hin-Fai Yam, Jodhbir S Mehta
BACKGROUND: This study was aimed to investigate the epithelial differentiation of human adipose-derived mesenchymal stem cells (ADSCs) by inhibiting glycogen synthase kinase-3 (GSK3) and transforming growth factor β (TGFβ) signaling. METHODS AND RESULTS: STEMPRO human ADSCs at passage 2 were treated with CHIR99021 (GSK3 inhibitor), E-616452 (TGFβ1 receptor kinase inhibitor), A-83-01 (TGFβ type 1 receptor inhibitor), valproic acid (histone deacetylase inhibitor), tranylcypromine (monoamine oxidase inhibitor) and all-trans retinoic acid for 72 h...
July 8, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28690765/novel-therapeutic-effects-of-leonurine-on-ischemic-stroke-new-mechanisms-of-bbb-integrity
#7
Qiu-Yan Zhang, Zhi-Jun Wang, De-Miao Sun, Ying Wang, Peng Xu, Wei-Jun Wu, Xin-Hua Liu, Yi-Zhun Zhu
Stroke is a leading cause of morbidity and mortality globally. Leonurine (also named SCM-198), a compound extracted from Herba leonuri, was effective on the prevention of various cardiovascular and brain diseases. The purpose of this study was to explore the possible therapeutic potential of SCM-198 against ischemia reperfusion injury and underlying mechanisms. In the in vivo transient middle cerebral artery occlusion (tMCAO) rat model, we found that treatment with SCM-198 could decrease infarct volume and improve neurological deficit by protecting against blood-brain barrier (BBB) breakdown...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28687847/silk-fibroin-films-for-corneal-endothelial-regeneration-transplant-in-a-rabbit-descemet-membrane-endothelial-keratoplasty
#8
Natalia Vázquez, Carlos A Rodríguez-Barrientos, Salvador D Aznar-Cervantes, Manuel Chacón, José L Cenis, Ana C Riestra, Ronald M Sánchez-Avila, Mairobi Persinal, Agustín Brea-Pastor, Luis Fernández-Vega Cueto, Álvaro Meana, Jesús Merayo-Lloves
Purpose: Develop a silk fibroin (SF)-based artificial endothelial graft for its use in a rabbit Descemet membrane endothelial keratoplasty (DMEK). Methods: Human and rabbit artificial corneal endothelial grafts were developed through the culture of human and rabbit corneal endothelial cells (CECs) on SF films. Rabbit artificial SF endothelial grafts were transplanted in a DMEK surgery into a rabbit in vivo model. Results: SF artificial endothelial grafts showed the characteristic endothelial markers: zonula occludens (ZO-1) and Na+/K+ ATPase...
July 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28683467/rbm38-is-involved-in-tgf-%C3%AE-induced-epithelial-to-mesenchymal-transition-by-stabilising-zonula-occludens-1-mrna-in-breast-cancer
#9
Jing Wu, Xu-Jie Zhou, Xi Sun, Tian-Song Xia, Xiao-Xia Li, Liang Shi, Lei Zhu, Wen-Bin Zhou, Ji-Fu Wei, Qiang Ding
BACKGROUND: The transforming growth factor-β (TGF-β) pathway plays a vital role in driving cancer cell epithelial-mesenchymal transition (EMT). Zonula occludens-1 (ZO-1), which is downregulated in response to TGF-β, is able to control endothelial cell-cell tension, cell migration, and barrier formation. However, the molecular mechanism of how TGF-β regulates ZO-1 expression remains unclear. METHODS: Breast cancer cells were treated with TGF-β to induce an EMT progress...
July 6, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28682305/ifn-%C3%AE-promotes-transendothelial-migration-of-cd4-t-cells-across-the-blood-brain-barrier
#10
Sandip Ashok Sonar, Shagufta Shaikh, Nupura Joshi, Ashwini N Atre, Girdhari Lal
Transendothelial migration (TEM) of Th1 and Th17 cells across the blood-brain barrier (BBB) plays a critical role in the development of experimental autoimmune encephalomyelitis (EAE). How cytokines produced by inflammatory Th1 and Th17 cells damage the endothelial BBB and promote transendothelial migration of immune cells into the central nervous system (CNS) during autoimmunity is not understood. We therefore investigated the effect of various cytokines on brain endothelial cells. Among the various cytokines tested, such as Th1 (IFN-γ, IL-1α, IL-1β, TNF-α, IL-12), Th2 (IL-3, IL-4, IL-6 and IL-13), Th17 (IL-17A, IL-17F, IL-21, IL-22, IL-23, GM-CSF) and Treg-specific cytokines (IL-10 and TGF-β), IFN-γ predominantly showed increased expression of ICAM-1, VCAM-1, MAdCAM-1, H2-K(b) and I-A(b) molecules on brain endothelial cells...
July 6, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28680530/mir-let7a-controls-the-cell-death-and-tight-junction-density-of-brain-endothelial-cells-under-high-glucose-condition
#11
Juhyun Song, So Ra Yoon, Oh Yoen Kim
Hyperglycemia-induced stress in the brain of patients with diabetes triggers the disruption of blood-brain barrier (BBB), leading to diverse neurological diseases including stroke and dementia. Recently, the role of microRNA becomes an interest in the research for deciphering the mechanism of brain endothelial cell damage under hyperglycemia. Therefore, we investigated whether mircoRNA Let7A (miR-Let7A) controls the damage of brain endothelial (bEnd.3) cells against high glucose condition. Cell viability, cell death marker expressions (p-53, Bax, and cleaved poly ADP-ribose polymerase), the loss of tight junction proteins (ZO-1 and claudin-5), proinflammatory response (interleukin-6, tumor necrosis factor-α), inducible nitric oxide synthase, and nitrite production were confirmed using MTT, reverse transcription-PCR, quantitative-PCR, Western blotting, immunofluorescence, and Griess reagent assay...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28678393/catechin-attenuates-traumatic-brain-injury-induced-impairments-of-blood-brain-barrier-damage-and-improve-longer-term-neurological-outcomes-in-rats
#12
Zhixian Jiang, Jinning Zhang, Yonghui Cai, Jiaxin Huang, Lingtong You
Traumatic brain injury (TBI), resulting from external force on the head usually lead to long-term deficits in motor and cognitive functions. Catechin has shown neuroprotective effect in neurodegenerative diseases and ischemia models. The present study therefore investigated the potential neuroprotective effects of catechin after TBI and explored the underlying mechanisms. Male rats were subjected to controlled cortical impact injury and then treated with catechin. Brain damages, motor and cognitive functions, blood-brain barrier (BBB) integrity and neuro-inflammation were examined...
July 5, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28672399/the-effect-of-a-p38-mitogen-activated-protein-kinase-inhibitor-on-cellular-senescence-of-cultivated-human-corneal-endothelial-cells
#13
Akane Hongo, Naoki Okumura, Makiko Nakahara, EunDuck P Kay, Noriko Koizumi
Purpose: We have begun a clinical trial of a cell-based therapy for corneal endothelial dysfunction in Japan. The purpose of this study was to investigate the usefulness of a p38 MAPK inhibitor for prevention cellular senescence in cultivated human corneal endothelial cells (HCECs). Methods: HCECs of 10 donor corneas were divided and cultured with or without SB203580 (a p38 MAPK inhibitor). Cell density and morphology were evaluated by phase-contrast microscopy...
July 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28669655/imm-h004-a-new-coumarin-derivative-improved-focal-cerebral-ischemia-via-blood-brain-barrier-protection-in-rats
#14
Fei Niu, Xiu-Yun Song, Jin-Feng Hu, Wei Zuo, Ling-Lei Kong, Xiao-Feng Wang, Ning Han, Nai-Hong Chen
OBJECTIVE: IMM-H004 (7-hydroxy-5-methoxy-4-methyl-3-[4-methylpiperazin-1-yl]-2H-chromen-2-one) is a novel coumarin derivative that showed better effect in improving global cerebral ischemia in rats. However, the effects and mechanisms in focal cerebral ischemia were not clear. Blood-brain barrier (BBB) protection is a vital strategy for the treatment of cerebral ischemia. This study is to investigate whether IMM-H004 improves brain ischemia injury via BBB protection. METHODS: Focal brain ischemia model was induced by middle cerebral artery occlusion for 1 hour and reperfusion (MCAO/R) for 24 hours in rats...
June 29, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28667800/lasp2-enhances-tumor-invasion-via-facilitating-phosphorylation-of-fak-and-predicts-poor-overall-survival-of-non-small-cell-lung-cancer-patients
#15
Xiupeng Zhang, Lin Cai, Haijing Zhou, Yang Liu, Chuifeng Fan, Liang Wang, Ailin Li, Yuan Miao, Qingchang Li, Xueshan Qiu, Enhua Wang
Lasp2, as well as Lasp1, is a member of the LIM-protein subfamily of the nebulin group characterized by the combined presence of LIM and SH3 domains. Lasp1 and Lasp2 are highly conserved in their LIM, nebulin-like and SH3 domains but differ significantly at their linker regions. Lasp1 had been described as an oncogenic protein that was highly expressed in diverse cancer types and facilitated tumor proliferation, invasion and metastasis process. However, unlike Lasp1, little is known about the functions of Lasp2...
July 1, 2017: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/28650928/circulating-exosomes-isolated-from-septic-mice-induce-cardiovascular-hyperpermeability-through-promoting-podosome-cluster-formation
#16
Xingjiang Mu, Xiaohong Wang, Wei Huang, Rui-Tao Wang, Kobina Essandoh, Yutian Li, Amanda M Pugh, Jiangtong Peng, Shan Deng, Yigang Wang, Charles C Caldwell, Tianqing Peng, Kai-Jiang Yu, Guo-Chang Fan
Septic shock increases vascular permeability, leading to multiple organ failure including cardiac dysfunction, a major contributor to septic death. Podosome, an actin-based dynamic membrane structure, plays critical roles in extracellular matrix degradation and angiogenesis. However, whether podosome contributes to endothelial barrier dysfunction during septic shock remains unknown. In this study, we found that the endothelial hyperpermeability, stimulated by PMA and thrombin, was accompanied by increased formation of podosome clusters at the cell periphery, indicating a positive correlation between podosome clusters and endothelial leakage...
June 23, 2017: Shock
https://www.readbyqxmd.com/read/28639275/statin-regulated-erk5-stimulates-tight-junction-formation-and-reduces-permeability-in-human-cardiac-endothelial-cells
#17
Emma L Wilkinson, James E Sidaway, Michael J Cross
The MEKK3/MEK5/ERK5 signalling axis is required for cardiovascular development in vivo. We analysed the physiological role of ERK5 in cardiac endothelial cells and the consequence of activation of this kinase by the statin class of HMG Co-A reductase inhibitor drugs. We utilised human microvascular endothelial cells (HCMECs) and altered ERK5 expression using siRNA mediated gene silencing or overexpression of constitutively active MEK5 and ERK5 to reveal a role for ERK5 in regulating endothelial tight junction formation and cell permeability...
June 21, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28638850/probiotic-lactobacillus-species-strengthen-intestinal-barrier-function-and-tight-junction-integrity-in-experimental-necrotizing-enterocolitis
#18
Brian P Blackwood, Carrie Y Yuan, Douglas R Wood, Joseph D Nicolas, Justyna S Grothaus, Catherine J Hunter
Necrotizing enterocolitis (NEC) is a serious intestinal disease that occurs in newborn infants. It is associated with major morbidity and affects 5% of all infants admitted to neonatal intensive care units. Probiotics have variable efficacy in preventing necrotizing enterocolitis. Tight junctions (TJ) are protein complexes that maintain epithelial barrier integrity. We hypothesized that the probiotics Lactobacillus rhamnosus and Lactobacillus plantarum strengthen intestinal barrier function, promote TJ integrity, and protect against experimental NEC...
April 2017: J Probiotics Health
https://www.readbyqxmd.com/read/28636255/recombinant-human-serum-albumin-for-corneal-preservation
#19
Mohit Parekh, Hossein Elbadawy, Gianni Salvalaio, Marie-Claude Amoureux, Enzo Di Iorio, Denis Fortier, Diego Ponzin, Stefano Ferrari, Alessandro Ruzza
PURPOSE: To study the performance of a completely synthetic organ culture (OC) preservation system containing recombinant human serum albumin (rHSA) for preservation of human donor corneas. METHODS: Twenty-four paired donor corneas were randomly collected, and one cornea from each donor was preserved in synthetic (experimental) and serum-based media (control). The tissues were assessed at day 0; after 6 days of preservation at room temperature (RT) in Cornea Trans(®) and Cornea Prep II(®) ; after 28 days at 31°C in Cornea Syn(®) [with rHSA] and Cornea Max(®) [with foetal calf serum (FCS)] and; 4-day post deswelling in Cornea Trans(®) and Cornea Jet(®) ...
June 21, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28627704/matrix-metalloproteinase-2-and-9-contribute-to-functional-integrity-and-noise%C3%A2-induced-damage-to-the-blood-labyrinth-barrier
#20
Jun Wu, Weiju Han, Xingrui Chen, Weiwei Guo, Ke Liu, Ruoya Wang, Jishuai Zhang, Na Sai
The cochlear blood-labyrinth barrier (BLB), located in the stria vascularis, is critical for the homeostasis of cochlear solutes and ion transport. Significant disruption to the BLB occurs early during noise‑induced hearing loss. Matrix metalloproteinase (MMP)‑2 and ‑9 are important molecules known to be capable of degrading tight junction (TJ) proteins. The TJ proteins are important components of the extracellular matrix (ECM), required to maintain BLB integrity and permeability. Previous studies have demonstrated that MMP‑2 and ‑9, rich in healthy cochlea, serve an essential role in regulating the cochlear response to acoustic trauma...
August 2017: Molecular Medicine Reports
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