keyword
MENU ▼
Read by QxMD icon Read
search

epithelial barrier

keyword
https://www.readbyqxmd.com/read/28212573/dynamic-variations-in-epithelial-to-mesenchymal-transition-emt-atm-and-slfn11-govern-response-to-parp-inhibitors-and-cisplatin-in-small-cell-lung-cancer
#1
C Allison Stewart, Pan Tong, Robert J Cardnell, Triparna Sen, Lerong Li, Carl M Gay, Fatemah Masrorpour, You Fan, Rasha O Bara, Ying Feng, Yuanbin Ru, Junya Fujimoto, Samrat T Kundu, Leonard E Post, Karen Yu, Yuqiao Shen, Bonnie S Glisson, Ignatio Wistuba, John V Heymach, Don L Gibbons, Jing Wang, Lauren Averett Byers
Small cell lung cancer (SCLC) is one of the most aggressive forms of cancer, with a 5-year survival <7%. A major barrier to progress is the absence of predictive biomarkers for chemotherapy and novel targeted agents such as PARP inhibitors. Using a high-throughput, integrated proteomic, transcriptomic, and genomic analysis of SCLC patient-derived xenografts (PDXs) and profiled cell lines, we identified biomarkers of drug sensitivity and determined their prevalence in patient tumors. In contrast to breast and ovarian cancer, PARP inhibitor response was not associated with mutations in homologous recombination (HR) genes (e...
February 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28209925/the-stress-polarity-pathway-ampk-giv-es-protection-against-metabolic-insults
#2
Pradipta Ghosh
Loss of cell polarity impairs organ development and function; it can also serve as one of the first triggers for oncogenesis. In 2006-2007 two groups simultaneously reported the existence of a special pathway for maintaining epithelial polarity in the face of environmental stressors. In this pathway, AMPK, a key sensor of metabolic stress stabilizes tight junctions, preserves cell polarity, and thereby, maintains epithelial barrier functions. Accumulating evidence since has shown that pharmacologic activation of AMPK by Metformin protects the epithelial barrier against multiple environmental and pathological stressful states and suppresses tumorigenesis...
February 15, 2017: Aging
https://www.readbyqxmd.com/read/28209602/a-novel-murine-model-of-esophageal-non-erosive-reflux-disease-nerd-from-inflammation-to-impairment-in-mucosal-integrity
#3
Renan O Silva, Francisco Fábio B Oliveira, Rudy D Bingana, Mailton O Arruda, Philip Woodland, Chung Lee, Miguel A Nobre E Souza, Pedro Marcos G Soares, Armenio A Santos, Daniel Sifrim, Marcellus H L P Souza
Non-erosive reflux disease (NERD) is a highly prevalent phenotype of the gastroesophageal reflux disease (GERD). In this study, we developed a novel murine model of NERD in mice with microscopic inflammation and impairment in the epithelial esophageal barrier. Female Swiss mice were subjected to the following surgical procedure: the transitional region between the forestomach and the glandular portion of the stomach was ligated, and a nontoxic ring was placed around the duodenum near the pylorus. The control group underwent sham surgery...
February 16, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28208612/enteric-pathogens-and-their-toxin-induced-disruption-of-the-intestinal-barrier-through-alteration-of-tight-junctions-in-chickens
#4
REVIEW
Wageha A Awad, Claudia Hess, Michael Hess
Maintaining a healthy gut environment is a prerequisite for sustainable animal production. The gut plays a key role in the digestion and absorption of nutrients and constitutes an initial organ exposed to external factors influencing bird's health. The intestinal epithelial barrier serves as the first line of defense between the host and the luminal environment. It consists of a continuous monolayer of intestinal epithelial cells connected by intercellular junctional complexes which shrink the space between adjacent cells...
February 10, 2017: Toxins
https://www.readbyqxmd.com/read/28206713/effect-of-heme-oxygenase-1-transduced-bone-marrow-mesenchymal-stem-cells-on-damaged-intestinal-epithelial-cells-in-vitro
#5
Yi Cao, Ben-Juan Wu, Wei-Ping Zheng, Ming-Li Yin, Tao Liu, Hong-Li Song
In this study we explored the effects of mesenchymal stem cells (MSCs) from bone marrow overexpressing heme oxygenase-1 (HO-1) on the damaged human intestinal epithelial barrier in vitro. Rat MSCs were isolated from bone marrow and transduced with rat HO-1 recombinant adenovirus (HO-MSCs) for stable expression of HO-1. Colorectal adenocarinoma 2 (Caco2) cells were treated with tumor necrosis factor-α (TNF-α) to establish a damaged colon epithelial model. Damaged Caco2 were cocultured with MSCs, Ad-MSCs, Ad-HO + MSCs or HO-MSCs mRNA and protein expression of Zona occludens-1 (ZO-1) and human HO-1, and the release of cytokines were measured...
February 16, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28202689/corneal-epithelial-stem-cells-and-their-niche-at-a-glance
#6
REVIEW
Craig S Nowell, Freddy Radtke
The corneal epithelium acts as a protective barrier on the anterior ocular surface and is essential for maintaining transparency of the cornea and thus visual acuity. During both homeostasis and repair, the corneal epithelium is maintained by self-renewing stem cells, which persist throughout the lifetime of the organism. Importantly, as in other self-renewing tissues, the functional activity of corneal epithelial stem cells (CSCEs) is tightly regulated by the surrounding microenvironment, or niche, which provides a range of cues that maintain the stem cell population...
February 15, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28199303/mechanical-stretch-triggers-rapid-epithelial-cell-division-through-piezo1
#7
S A Gudipaty, J Lindblom, P D Loftus, M J Redd, K Edes, C F Davey, V Krishnegowda, J Rosenblatt
Despite acting as a barrier for the organs they encase, epithelial cells turn over at some of the fastest rates in the body. However, epithelial cell division must be tightly linked to cell death to preserve barrier function and prevent tumour formation. How does the number of dying cells match those dividing to maintain constant numbers? When epithelial cells become too crowded, they activate the stretch-activated channel Piezo1 to trigger extrusion of cells that later die. However, it is unclear how epithelial cell division is controlled to balance cell death at the steady state...
February 15, 2017: Nature
https://www.readbyqxmd.com/read/28197380/the-influence-of-gut-decontamination-prophylactic-antibiotics-on-acute-graft-versus-host-disease-and-survival-following-allogeneic-hematopoietic-stem-cell-transplantation
#8
Bertrand Routy, Caroline Letendre, David Enot, Maxime Chénard-Poirier, Vikram Mehraj, Noémie Charbonneau Séguin, Khaled Guenda, Kathia Gagnon, Paul-Louis Woerther, David Ghez, Silvy Lachance
The intestinal microbiota plays a key role in the pathogenesis of acute graft-versus-host disease (aGVHD). High-dose conditioning regimens given prior to allogeneic hematopoietic stem cell transplantation (aHSCT) modulate the composition of gut microbiota and damage the gut epithelial barrier, resulting in increased systemic inflammation. We assessed whether gut decontamination with antibiotics (ATB) prior to aHSCT influenced the frequency of aGVHD and mortality in 500 patients from two Canadian centers between 2005 and 2012...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28196152/human-histologic-evidence-of-reosseointegration-around-an-implant-affected-with-peri-implantitis-following-decontamination-with-sterile-saline-and-antiseptics-a-case-history-report
#9
Paul Fletcher, Daniel Deluiz, Eduardo Mb Tinoco, John L Ricci, Dennis P Tarnow, Justine Monnerat Tinoco
The treatment of peri-implant disease is one of the most controversial topics in implant dentistry. The multifactorial etiology and the myriad proposed techniques for managing the problem make successful decontamination of an implant surface affected by peri-implantitis one of the more unpredictable challenges dental practitioners have to face. This article presents the first known published case report demonstrating human histologic evidence of reosseointegration using a plastic curette for mechanical debridement and dilute sodium hypochlorite, hydrogen peroxide, and sterile saline for chemical detoxification...
February 14, 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28195747/do-aging-factors-influence-the-clinical-presentation-and-management-of-chronic-rhinosinusitis
#10
Axel E Renteria, Leandra Mfuna Endam, Martin Desrosiers
Objective/Hypothesis Chronic rhinosinusitis (CRS) is a complex inflammatory disease of the upper respiratory airways resulting from the dysregulation of immunity and epithelial defenses. More recently, the contribution of an altered nasal microbiome to the development of CRS has also been proposed. However, the impact of aging on the development of CRS has been long overlooked. Here we propose, in a hypothesis piece, that aging can influence the physiopathology of CRS and its subsequent management in an elderly population...
February 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28195397/alcohol-injury-damages-intestinal-stem-cells
#11
Rong Lu, Robin M Voigt, Yongguo Zhang, Ikuko Kato, Yinglin Xia, Christopher B Forsyth, Ali Keshavarzian, Jun Sun
BACKGROUND: Alcohol consumption is associated with intestinal injury including intestinal leakiness and the risk of developing progressive gastrointestinal cancer. Alcoholics have disruption of intestinal barrier dysfunction that persists weeks after stopping alcohol intake and this occurs in spite of the fact that intestinal epithelial cells turn over every 3-5 days. The renewal and functional regulation of the intestinal epithelium largely relies on intestinal stem cells (ISCs). Chronic inflammation and tissue damage in the intestine can injure stem cells including accumulation of mutations that may result in ISC dysfunction and transformation...
February 14, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28194704/challenges-and-future-prospects-for-the-delivery-of-biologics-oral-mucosal-pulmonary-and-transdermal-routes
#12
Javier O Morales, Kristin R Fathe, Ashlee Brunaugh, Silvia Ferrati, Song Li, Miguel Montenegro-Nicolini, Zeynab Mousavikhamene, Jason T McConville, Mark R Prausnitz, Hugh D C Smyth
Biologic products are large molecules such as proteins, peptides, nucleic acids, etc., which have already produced many new drugs for clinical use in the last decades. Due to the inherent challenges faced by biologics after oral administration (e.g., acidic stomach pH, digestive enzymes, and limited permeation through the gastrointestinal tract), several alternative routes of administration have been investigated to enable sufficient drug absorption into systemic circulation. This review describes the buccal, sublingual, pulmonary, and transdermal routes of administration for biologics with relevant details of the respective barriers...
February 13, 2017: AAPS Journal
https://www.readbyqxmd.com/read/28194462/designing-an-efficient-multi-epitope-oral-vaccine-against-helicobacter-pylori-using-immunoinformatics-and-structural-vaccinology-approaches
#13
Navid Nezafat, Mahboobeh Eslami, Manica Negahdaripour, Mohammad Reza Rahbar, Younes Ghasemi
Helicobacter pylori is the cunning bacterium that can live in the stomachs of many people without any symptoms, but gradually can lead to gastric cancer. Due to various obstacles, which are related to anti-H. pylori antibiotic therapy, recently developing an anti-H. pylori vaccine has attracted more attention. In this study, different immunoinformatics and computational vaccinology approaches were employed to design an efficient multi-epitope oral vaccine against H. pylori. Our multi-epitope vaccine is composed of heat labile enterotoxin IIc B (LT-IIc) that is used as a mucosal adjuvant to enhance vaccine immunogenicity for oral immunization, cartilage oligomeric matrix protein (COMP) to increase vaccine stability in acidic pH of gut, one experimentally protective antigen, OipA, and two hypothetical protective antigens, HP0487 and HP0906, and "CTGKSC" peptide motif that target epithelial microfold cells (M cells) to enhance vaccine uptake from the gut barrier...
February 14, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28193722/targeting-the-mucosal-barrier-how-pathogens-modulate-the-cellular-polarity-network
#14
Travis R Ruch, Joanne N Engel
The mucosal barrier is composed of polarized epithelial cells with distinct apical and basolateral surfaces separated by tight junctions and serves as both a physical and immunological barrier to incoming pathogens. Specialized polarity proteins are critical for establishment and maintenance of polarity. Many human pathogens have evolved virulence mechanisms that target the polarity network to enhance binding, create replication niches, move through the barrier by transcytosis, or bypass the barrier by disrupting cell-cell junctions...
February 13, 2017: Cold Spring Harbor Perspectives in Biology
https://www.readbyqxmd.com/read/28193579/zinc-enhances-intestinal-epithelial-barrier-function-through-the-pi3k-akt-mtor-signaling-pathway-in-caco-2-cells
#15
Yuxin Shao, Patricia G Wolf, Shuangshuang Guo, Yuming Guo, H Rex Gaskins, Bingkun Zhang
Zinc plays an important role in maintaining intestinal barrier function as well as modulating cellular signaling recognition and protein kinase activities. The phosphatidylinositol 3-kinase (PI3K) cascade has been demonstrated to affect intercellular integrity and tight junction (TJ) proteins. The current study investigated the hypothesis that zinc regulates intestinal intercellular junction integrity through the PI3K/protein kinase B (AKT)/mammalian target of rapamycin (mTOR) pathway. A transwell model of Caco-2 cell was incubated with 0, 50 and 100 μM of zinc at various time points...
January 31, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28193514/microrna-301a-promotes-intestinal-inflammation-and-colitis-associated-cancer-development-by-inhibiting-btg1
#16
Chong He, Tianming Yu, Yan Shi, Caiyun Ma, Wenjing Yang, Leilei Fang, Mingming Sun, Wei Wu, Fei Xiao, Feifan Guo, Minhu Chen, Hong Yang, Jiaming Qian, Yingzi Cong, Zhanju Liu
BACKGROUND & AIMS: Intestinal tissues from patients with inflammatory bowel disease (IBD) and colorectal cancer have increased expression of microRNA-301a (MIR301A), compared to tissues from patients without IBD. We studied the mechanisms of MIR301A in progression of IBD in human tissues and mice. METHODS: We isolated intestinal epithelial cells (IECs) from colon biopsy samples of 153 patients with different stages of IBD activity, 6 patients with colitis-associated cancer (CAC), and 35 healthy individuals (controls), enrolled in the study in Shanghai, China...
February 10, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28192541/immune-driven-alterations-in-mucin-sulphation-is-an-important-mediator-of-trichuris-muris-helminth-expulsion
#17
Sumaira Z Hasnain, Paul A Dawson, Rohan Lourie, Peter Hutson, Hui Tong, Richard K Grencis, Michael A McGuckin, David J Thornton
Mucins are heavily glycosylated proteins that give mucus its gel-like properties. Moreover, the glycans decorating the mucin protein core can alter the protective properties of the mucus barrier. To investigate whether these alterations could be parasite-induced we utilized the Trichuris muris (T. muris) infection model, using different infection doses and strains of mice that are resistant (high dose infection in BALB/c and C57BL6 mice) or susceptible (high dose infection in AKR and low dose infection in BALB/c mice) to chronic infection by T...
February 13, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28191699/ndrg1-is-important-to-maintain-the-integrity-of-airway-epithelial-barrier-through-claudin-9-expression
#18
Yasuhiro Gon, Shuichiro Maruoka, Hiroyuki Kishi, Yutaka Kozu, Kuroda Kazumichi, Yasuyuki Nomura, Ikuko Takeshita, Takeshi Oshima, Shu Hashimoto
Impairment of epithelial barrier integrity caused by environmental triggers is associated with the pathogenesis of airway inflammation. Using human airway epithelial cells, we attempted to identify molecule(s) that promote airway epithelial barrier integrity. Microarray analyses were conducted using the Affimetrix human whole genome gene chip, and we identified the N-myc downstream-regulated gene 1 (NDRG1) gene, which was induced during the development of the epithelial cell barrier. Immunohistochemical analysis revealed strong NDRG1 expression in ciliated epithelial cells in nasal tissues sampled from patients with chronic rhinosinusitis (CRS), and the low expression of NDRG1 was observed in goblet cells or damaged epithelial cells...
February 13, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28188963/high-risk-epithelial-ovarian-cancer-patients-for-hereditary-ovarian-cancer
#19
Seksit Chirasophon, Tarinee Manchana, Chinachote Teerapakpinyo
AIM: Risk assessment to identify patients at risk for hereditary ovarian cancer is important. The objectives of this study were to evaluate the frequency of high-risk epithelial ovarian cancer (EOC) patients and the frequency of germline mutation in these patients. METHODS: A total of 335 patients with histologically confirmed non-mucinous EOC were included. High-risk patients were defined as patients who had: (i) significant family history of breast/ovarian/colorectal/endometrial cancers; (ii) synchronous breast/endometrial/colorectal cancer; or (iii) high-grade serous carcinoma...
February 11, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28188784/microtubule-associated-protein-1s-related-autophagy-inhibits-apoptosis-of-intestinal-epithelial-cells-via-wnt-%C3%AE-catenin-signaling-in-crohn-s-disease
#20
Wenxia Bai, Jian'an Bai, Yanhai Li, Delong Tian, Ruihua Shi
Many autophagy-related genes, to our knowledge, have been identified as Crohn's disease (CD) polymorphic sites by genomic wide studies. As a novel member of the microtubule-associated protein 1 (MAP1) family, MAP1S is a microtubule-binding proteins involved in autophagy. However, its expression and potential functions in CD have not been understood. For the first time, we discovered the up-regulated MAP1S and autophagy level (indicated by LC3-Ⅱ/LC3-Ⅰ) in inflamed epithelium among CD patients. Similarly, in TNBS-induced murine colitis model, MAP1S expression was obviously increased...
February 7, 2017: Biochemical and Biophysical Research Communications
keyword
keyword
95547
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"