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https://www.readbyqxmd.com/read/28338398/dexamethasone-suppresses-jmjd3-gene-activation-via-a-putative-negative-glucocorticoid-response-element-and-maintains-integrity-of-tight-junctions-in-brain-microvascular-endothelial-cells
#1
Wonho Na, Jee Y Shin, Jee Y Lee, Sangyun Jeong, Won-Sun Kim, Tae Y Yune, Bong-Gun Ju
The blood-brain barrier (BBB) exhibits a highly selective permeability to support the homeostasis of the central nervous system (CNS). The tight junctions in the BBB microvascular endothelial cells seal the paracellular space to prevent diffusion. Thus, disruption of tight junctions results in harmful effects in CNS diseases and injuries. It has recently been demonstrated that glucocorticoids have beneficial effects on maintaining tight junctions in both in vitro cell and in vivo animal models. In the present study, we found that dexamethasone suppresses the expression of JMJD3, a histone H3K27 demethylase, via the recruitment of glucocorticoid receptor α (GRα) and nuclear receptor co-repressor (N-CoR) to the negative glucocorticoid response element (nGRE) in the upstream region of JMJD3 gene in brain microvascular endothelial cells subjected to TNFα treatment...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28335796/predicting-dementia-using-socio-demographic-characteristics-and-the-free-and-cued-selective-reminding-test-in-the-general-population
#2
Thibault Mura, Marieta Baramova, Audrey Gabelle, Sylvaine Artero, Jean-François Dartigues, Hélène Amieva, Claudine Berr
BACKGROUND: Our study aimed to determine whether the consideration of socio-demographic features improves the prediction of Alzheimer's dementia (AD) at 5 years when using the Free and Cued Selective Reminding Test (FCSRT) in the general older population. METHODS: Our analyses focused on 2558 subjects from the prospective Three-City Study, a cohort of community-dwelling individuals aged 65 years and over, with FCSRT scores. Four "residual scores" and "risk scores" were built that included the FCSRT scores and socio-demographic variables...
March 23, 2017: Alzheimer's Research & Therapy
https://www.readbyqxmd.com/read/28335773/oral-administration-of-propionic-acid-during-lactation-enhances-the-colonic-barrier-function
#3
Zhaobo Xia, Yijiang Han, Ke Wang, Shikun Guo, Dazhou Wu, Xiaozhong Huang, Zhongrong Li, Libin Zhu
BACKGROUND: Propionic acid is a three-carbon short chain fatty acid (SCFA) that has various effects on colonic functions. Although several studies have shown the effects of propionic acid on intestinal mucosal barrier function, studies of the promotion effect during pre-weaning are rare in the literature as far as we know. METHODS: Pre-weaning male Sprague-Dawley rats 7 days after birth were given an oral 0.2 mL/10 g of 200 mM propionic acid solution in the propionic acid group or normal saline solution in the control group by gavage twice a day for ten days...
March 23, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28333312/establishment-maintenance-and-functional-integrity-of-the-blood-testis-barrier-in-organotypic-cultures-of-fresh-and-frozen-thawed-prepubertal-mouse-testes
#4
C Rondanino, A Maouche, L Dumont, A Oblette, N Rives
STUDY QUESTION: Can the spatio-temporal formation of an intact blood-testis barrier (BTB), which is essential for the progression of spermatogenesis, be reproduced in cultures of fresh or frozen/thawed prepubertal mouse testes? SUMMARY ANSWER: Organotypic cultures allow the establishment and maintenance of major BTB components and the formation of a functional BTB in mouse testicular tissues. WHAT IS KNOWN ALREADY: In vitro maturation of prepubertal testicular tissues is a promising approach to restore fertility in adult survivors of childhood cancer...
March 17, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28323272/constipation-predominant-irritable-bowel-syndrome-females-have-normal-colonic-barrier-and-secretory-function
#5
Stephanie A Peters, Shoko Edogawa, Wendy J Sundt, Roy B Dyer, Daniel A Dalenberg, Amelia Mazzone, Ravinder J Singh, Natalie Moses, Thomas C Smyrk, Christopher Weber, David R Linden, Wallace K MacNaughton, Jerrold R Turner, Michael Camilleri, David A Katzka, Gianrico Farrugia, Madhusudan Grover
OBJECTIVES: The objective of this study was to determine whether constipation-predominant irritable bowel syndrome (IBS-C) is associated with changes in intestinal barrier and secretory function. METHODS: A total of 19 IBS-C patients and 18 healthy volunteers (all females) underwent saccharide excretion assay (0.1 g (13)C mannitol and 1 g lactulose), measurements of duodenal and colonic mucosal barrier (transmucosal resistance (TMR), macromolecular and Escherichia coli Bio-Particle translocation), mucosal secretion (basal and acetylcholine (Ach)-evoked short-circuit current (Isc)), in vivo duodenal mucosal impedance, circulating endotoxins, and colonic tight junction gene expression...
March 21, 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28322979/3-4-methylenedioxymethamphetamine-mdma-ecstasy-produces-edema-due-to-bbb-disruption-induced-by-mmp-9-activation-in-rat-hippocampus
#6
Mercedes Pérez-Hernández, María Encarnación Fernández-Valle, Ana Rubio-Araiz, Rebeca Vidal, María Dolores Gutiérrez-López, Esther O'Shea, María Isabel Colado
The recreational drug of abuse, 3,4-methylenedioxymethamphetamine (MDMA, ecstasy) disrupts blood-brain barrier (BBB) integrity in rats through an early P2X7 receptor-mediated event which induces MMP-9 activity. Increased BBB permeability often causes plasma proteins and water to access cerebral tissue leading to vasogenic edema formation. The current study was performed to examine the effect of a single neurotoxic dose of MDMA (12.5 mg/kg, i.p.) on in vivo edema development associated with changes in the expression of the perivascular astrocytic water channel, AQP4, as well as in the expression of the tight-junction (TJ) protein, claudin-5 and Evans Blue dye extravasation in the hippocampus of adult male Dark Agouti rats...
March 16, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28302713/family-cord-blood-banking-for-sickle-cell-disease-a-twenty-year-experience-in-two-dedicated-public-cord-blood-banks
#7
Hanadi Rafii, Françoise Bernaudin, Helene Rouard, Valérie Vanneaux, Annalisa Ruggeri, Marina Cavazzana, Valerie Gauthereau, Aurélie Stanislas, Malika Benkerrou, Mariane De Montalembert, Christele Ferry, Robert Girot, Cecile Arnaud, Annie Kamdem, Joelle Gour, Claudine Touboul, Audrey Cras, Mathieu Kuentz, Claire Rieux, Fernanda Volt, Barbara Cappelli, Karina T Maio, Annalisa Paviglianiti, Chantal Kenzey, Jerome Larghero, Eliane Gluckman
Efforts to implement family cord blood banking have been developed in the past decades for siblings requiring stem cell transplantation for conditions such as sickle cell disease. However, public banks are faced with challenging decisions about the units to be stored, discarded, or used for other endeavors. We report here 20 years of experience in family cord blood banking for sickle cell disease in two dedicated public banks. Participants were pregnant women who had previous child diagnosed with homozygous sickle cell disease...
March 16, 2017: Haematologica
https://www.readbyqxmd.com/read/28299836/involvement-of-pka-signalling-in-anti-inflammatory-effects-of-chitosan-oligosaccharides-in-ipec-j2-porcine-epithelial-cells
#8
J W Yang, G Tian, D W Chen, Y Yao, J He, P Zheng, X B Mao, J Yu, Z Q Huang, B Yu
Weaning is characterized by intestinal inflammation, which is a big challenge in pig industry. Control of intestinal inflammation is important for improvement of growth performance and health. Therefore, the study was focused on the anti-inflammatory activity of low-molecular-weight chitosan oligosaccharide (LCOS) in a porcine small intestinal epithelial cell line (IPEC-J2). The results showed that TNF-α, as inflammation inducer, significantly upregulated the mRNA expression of IL-8 and MCP-1. Afterwards, LCOS significantly attenuated mRNA expression of IL-8 and MCP-1 induced by TNF-α in the cells...
March 16, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28298536/pasteurization-procedures-for-donor-human-milk-affect-body-growth-intestinal-structure-and-resistance-against-bacterial-infections-in-preterm-pigs
#9
Yanqi Li, Duc Ninh Nguyen, Marita de Waard, Lars Christensen, Ping Zhou, Pingping Jiang, Jing Sun, Anders Miki Bojesen, Charlotte Lauridsen, Jens Lykkesfeldt, Trine Kastrup Dalsgaard, Stine Brandt Bering, Per Torp Sangild
Background: Holder pasteurization (HP) destroys multiple bioactive factors in donor human milk (DM), and UV-C irradiation (UVC) is potentially a gentler method for pasteurizing DM for preterm infants.Objective: We investigated whether UVC-treated DM improves gut maturation and resistance toward bacterial infections relative to HP-treated DM.Methods: Bacteria, selected bioactive components, and markers of antioxidant capacity were measured in unpasteurized donor milk (UP), HP-treated milk, and UVC-treated milk (all from the same DM pool)...
March 15, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28279791/methionine-hydroxy-analogue-improves-intestinal-immunological-and-physical-barrier-function-in-young-grass-carp-ctenopharyngodon-idella
#10
Fei-Yu Pan, Pei Wu, Lin Feng, Wei-Dan Jiang, Sheng-Yao Kuang, Ling Tang, Wu-Neng Tang, Yong-An Zhang, Xiao-Qiu Zhou, Yang Liu
This study was conducted to test the hypothesis that methionine hydroxy analogue (MHA) enhances the defense against enteritis occurrence via improving intestinal barrier function in fish. After 630 young grass carp (Ctenopharyngodon idella) (259.70 ± 0.47 g) fed six graded levels of MHA (0, 2.4, 4.4, 6.4, 8.5 and 10.5 g/kg diet) and one dl-methionine group (6.4 g/kg diet) for 8 weeks. At the end of feeding trial, 15 fish from each treatment were challenged with Aeromonas hydrophila for 14 days. The results indicated that optimal MHA enhanced the capacity of fish against enteritis emergence, which might be related to the positive effects of MHA on intestinal immunological and physical barrier function in fish...
March 6, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28278250/zinc-reduces-epithelial-barrier-compromise-induced-by-human-seminal-plasma
#11
James M Mullin, Katherine M Diguilio, Mary C Valenzano, Rachael Deis, Sunil Thomas, E Peter Zurbach, Shaheed Abdulhaqq, Luis J Montaner
Human semen has the potential to modulate the epithelial mucosal tissues it contacts, as seminal plasma (SP) is recognized to contain both pro- and anti-barrier components, yet its effects on epithelial barrier function are largely unknown. We addressed the role of human SP when exposed to the basal-lateral epithelial surface, a situation that would occur clinically with prior mechanical or disease-related injury of the human epithelial mucosal cell layers in contact with semen. The action of SP on claudins-2, -4, -5, and -7 expression, as well as on a target epithelium whose basolateral surface has been made accessible to SP, showed upregulation of claudins-4 and -5 in CACO-2 human epithelial cell layers, despite broad variance in SP-induced modulation of transepithelial electrical resistance and mannitol permeability...
2017: PloS One
https://www.readbyqxmd.com/read/28273404/association-of-genetic-polymorphisms-of-claudin-1-with-small-vessel-vascular-dementia
#12
Vivek Srinivasan, Nady Braidy, Ying Hua Xu, Peter Xie, Kiran Kancherla, Sashiruben Chandramohan, Eunice Kar Wing Chan, Daniel Ky Chan
The most recent hypothesis of the development of small vessel vascular dementia (VaD) emphasises the role of blood-brain barrier (BBB) dysfunction. It is hypothesised that certain genetic polymorphisms of the BBB tight junction claudin-1 protein, in combination with adverse environmental risk factors, increase the risk of BBB dysfunction and small vessel VaD. In this case-control study, 97 control participants, with a mean Mini Mental State Exam (MMSE) score of 29.1, and 38 VaD participants were recruited and completed a questionnaire on their medical history and lifestyle factors...
March 8, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28264905/perforin-expression-by-cd8-t-cells-is-sufficient-to-cause-fatal-brain-edema-during-experimental-cerebral-malaria
#13
Matthew Huggins, Holly L Johnson, Fang Jin, Aurelie N'Songo, Lisa M Hanson, Stephanie J LaFrance, Noah S Butler, John T Harty, Aaron J Johnson
Human cerebral malaria (HCM) is a serious complication of Plasmodium falciparum infection. The most severe outcomes for patients include coma, permanent neurological deficits, and death. Recently, a large-scale magnetic resonance imaging (MRI) study in humans identified brain swelling as the most prominent predictor of fatal HCM. Therefore, in this study we sought to define the mechanism controlling brain edema through the use of the murine experimental cerebral malaria (ECM) model. Specifically, we investigated the ability of CD8 T cells to initiate brain edema during ECM...
March 6, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28259823/evaluation-of-permeability-alteration-and-epithelial-mesenchymal-transition-induced-by-transforming-growth-factor-%C3%AE-1-in-a549-nci-h441-and-calu-3-cells-development-of-an-in-vitro-model-of-respiratory-epithelial-cells-in-idiopathic-pulmonary-fibrosis
#14
Kohei Togami, Kotaro Yamaguchi, Sumio Chono, Hitoshi Tada
INTRODUCTION: Idiopathic pulmonary fibrosis (IPF) is a lethal lung disease, which is accompanied by changes in lung structure. With regard to treatment, aerosolized drugs administered intrapulmonarily are rapidly distributed into the plasma and do not remain in the lungs due to damage to the alveolar epithelium that occurs from pulmonary fibrosis. In this study, we sought to develop an in vitro model of respiratory epithelial cells in IPF for the evaluation of the intrapulmonary distribution of aerosolized drugs...
March 1, 2017: Journal of Pharmacological and Toxicological Methods
https://www.readbyqxmd.com/read/28259136/therapeutic-effects-of-different-doses-of-polyethylene-glycosylated-porcine-glucagon-like-peptide-2-on-ulcerative-colitis-in-male-rats
#15
Ke-Ke Qi, Jia-Jia Lv, Jie Wu, Zi-Wei Xu
BACKGROUND: Polyethylene glycosylated (PEGylated) porcine glucagon-like peptide-2 (pGLP-2) considerably increases half-life and stability compared with the native pGLP-2, but the effective dose for intestinal damage is still unclear. This study aims to evaluate the available dose of polyethylene glycosylated porcine glucagon-like peptide-2 (PEG-pGLP-2), a modified, long-acting form of pGLP-2 in an experimental rat model of ulcerative colitis. METHODS: Thirty-five male rats were randomly assigned into five groups: control, dextran sodium sulphate (DSS), DSS + PEG-pGLP-2(L), DSS + PEG-pGLP-2(M) and DSS + PEG-pGLP-2(H)...
March 4, 2017: BMC Gastroenterology
https://www.readbyqxmd.com/read/28256572/clinicopathological-and-molecular-characterization-of-smarca4-deficient-thoracic-sarcomas-with-comparison-to-potentially-related-entities
#16
Akihiko Yoshida, Eisuke Kobayashi, Takashi Kubo, Makoto Kodaira, Toru Motoi, Noriko Motoi, Kan Yonemori, Yuichiro Ohe, Shun-Ichi Watanabe, Akira Kawai, Takashi Kohno, Hiroshi Kishimoto, Hitoshi Ichikawa, Nobuyoshi Hiraoka
A growing number of studies suggest critical tumor suppressor roles of the SWI/SNF chromatin remodeling complex in a variety of human cancers. The recent discovery of SMARCA4-deficient thoracic sarcomas has added to the list of tumor groups with the SMARCA4 inactivating mutation. To better characterize these tumors and establish their nosological status, we undertook a clinicopathological and molecular analysis of 12 SMARCA4-deficient thoracic sarcomas and compared them with three potentially related disease entities...
March 3, 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/28250758/propofol-protects-against-blood-spinal-cord-barrier-disruption-induced-by-ischemia-reperfusion-injury
#17
Li-Jie Xie, Jin-Xiu Huang, Jian Yang, Fen Yuan, Shuang-Shuang Zhang, Qi-Jing Yu, Ji Hu
Propofol has been shown to exert neuroprotective effects on the injured spinal cord. However, the effect of propofol on the blood-spinal cord barrier (BSCB) after ischemia/reperfusion injury (IRI) is poorly understood. Therefore, we investigated whether propofol could maintain the integrity of the BSCB. Spinal cord IRI (SCIRI) was induced in rabbits by infrarenal aortic occlusion for 30 minutes. Propofol, 30 mg/kg, was intravenously infused 10 minutes before aortic clamping as well as at the onset of reperfusion...
January 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28247028/localization-and-pneumococcal-alteration-of-junction-proteins-in-the-human-alveolar-capillary-compartment
#18
Andrea Peter, Diana Fatykhova, Olivia Kershaw, Achim D Gruber, Jens Rueckert, Jens Neudecker, Mario Toennies, Torsten T Bauer, Paul Schneider, Maria Schimek, Stephan Eggeling, Norbert Suttorp, Andreas C Hocke, Stefan Hippenstiel
Loss of alveolar barrier function with subsequent respiratory failure is a hallmark of severe pneumonia. Although junctions between endo- and epithelial cells regulate paracellular fluid flux, little is known about their composition and regulation in the human alveolar compartment. High autofluorescence of human lung tissue in particular complicates the determination of subcellular protein localization. By comparing conventional channel mode confocal imaging with spectral imaging and linear unmixing, we demonstrate that background fluorescent spectra and fluorophore signals could be rigorously separated resulting in complete recovery of the specific signal at a high signal-to-noise ratio...
March 1, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28245149/airborne-particulate-matter-induces-non-allergic-eosinophilic-sinonasal-inflammation-in-mice
#19
Murugappan Ramanathan, Nyall R London, Anuj Tharakan, Nitya Surya, Thomas E Sussan, Xiaoquan Rao, Sandra Y Lin, Elina Toskala, Sanjay Rajagopalan, Shyam Biswal
RATIONALE: Exposure to airborne particulate matter has been linked to aggravation of respiratory symptoms, increased risk of cardiovascular disease, and all-cause mortality. While the health effects of particulate matter on the lower pulmonary airway have been extensively studied, little is known regarding the impact of chronic particulate matter exposure on the upper sinonasal airway. OBJECTIVES: To test the impact of chronic airborne particulate matter exposure on the upper respiratory system in vivo...
February 28, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28243834/sodium-tanshinone-iia-sulfonate-enhances-effectiveness-rt-pa-treatment-in-acute-ischemic-stroke-patients-associated-with-ameliorating-blood-brain-barrier-damage
#20
Biying Ji, Fei Zhou, Lijuan Han, Jun Yang, Haijian Fan, Shanshan Li, Jingwei Li, Xin Zhang, Xiaoying Wang, Xiangyan Chen, Yun Xu
Treatment with sodium tanshinone IIA sulfonate (STS) may ameliorate blood-brain barrier (BBB) damage in acute ischemic stroke patients receiving recombinant tissue plasminogen activator (rt-PA) thrombolysis and improve stroke patients' outcome. This randomized, single-center, placebo-controlled clinical trial investigated the potential effects and underlying mechanisms of STS. Forty-two acute ischemic stroke patients receiving intravenous rt-PA thrombolysis were randomized to intravenous administration either with STS (60 mg/day) (n = 21) or with equivalent volume of saline as a placebo (n = 21) after randomization for 10 days...
February 27, 2017: Translational Stroke Research
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