Helicobacter pylori Stimulates DNA Synthesis in a Small Intestinal Cell Line in vitro

Digestion ◽  
1998 ◽  
Vol 59 (1) ◽  
pp. 33-39 ◽  
Author(s):  
Johanna Brännström ◽  
Kristina Zachrisson ◽  
Kristina Hultén ◽  
Lars Engstrand ◽  
Andrés Uribe
Keyword(s):  
Helicobacter Pylori ◽  
Dna Synthesis ◽  
Cell Line ◽  
Intestinal Cell ◽  
Intestinal Cell Line ◽  
Small Intestinal

scholarly journals Effect of Helicobacter pylori on Polymorphonuclear Leukocyte Migration across Polarized T84 Epithelial Cell Monolayers: Role of Vacuolating Toxin VacA and cagPathogenicity Island

2000 ◽  
Vol 68 (9) ◽  
pp. 5225-5233 ◽  
Author(s):  
Véronique Hofman ◽  
Vittorio Ricci ◽  
Antoine Galmiche ◽  
Patrick Brest ◽  
Patrick Auberger ◽  
...  
Keyword(s):  
Helicobacter Pylori ◽  
Polymorphonuclear Leukocyte ◽  
Broth Culture ◽  
Intestinal Cell ◽  
T84 Cells ◽  
Vacuolating Cytotoxin ◽  
Intestinal Cell Line ◽  
H Pylori

ABSTRACT Helicobacter pylori infection can induce polymorphonuclear leukocyte (PMNL) infiltration of the gastric mucosa, which characterizes acute chronic gastritis. The mechanisms underlying this process are poorly documented. The lack of an in vitro model has considerably impaired the study of transepithelial migration of PMNL induced by H. pylori. In the present work, we used confluent polarized monolayers of the human intestinal cell line T84 grown on permeable filters to analyze the epithelial PMNL response induced by broth culture filtrates (BCFs) and bacterial suspensions from different strains of H. pylori. We have evaluated the role of the vacuolating cytotoxin VacA and of the cagpathogenicity island (PAI) of H. pylori in PMNL migration via their effects on T84 epithelial cells. We noted no difference in the rates of PMNL transepithelial migration after epithelial preincubation with bacterial suspensions or with BCFs of VacA-negative or VacA-positive H. pylori strains. In contrast, PMNL transepithelial migration was induced after incubation of the T84 cells with cag PAI-positive and cagE-positiveH. pylori strains. Finally, PMNL migration was correlated with a basolateral secretion of interleukin-8 by T84 cells, thus creating a subepithelial chemotactic gradient for PMNL. These data provide evidence that the vacuolating cytotoxin VacA is not involved in PMNL transepithelial migration and that the cag PAI, with a pivotal role for the cagE gene, provokes a transcellular signal across T84 monolayers, inducing a subepithelial PMNL response.

scholarly journals Traditional Herbal Medicine, Rikkunshito, Induces HSP60 and Enhances Cytoprotection of Small Intestinal Mucosal Cells as a Nontoxic Chaperone Inducer

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Kumiko Tamaki ◽  
Michiro Otaka ◽  
Tomoyoshi Shibuya ◽  
Naoto Sakamoto ◽  
Soh Yamamoto ◽  
...  
Keyword(s):  
Herbal Medicine ◽  
Immunoblot Analysis ◽  
Intestinal Cell ◽  
Traditional Herbal Medicine ◽  
Intestinal Cell Line ◽  
Mucosal Cells ◽  
Hsp60 Expression ◽  
Small Intestinal ◽  
Intestinal Ulcers

Increasing incidence of small intestinal ulcers associated with nonsteroidal anti-inflammatory drugs (NSAIDs) has become a topic with recent advances of endoscopic technology. However, the pathogenesis and therapy are not fully understood. The aim of this study is to examine the effect of Rikkunshito (TJ-43), a traditional herbal medicine, on expression of HSP60 and cytoprotective ability in small intestinal cell line (IEC-6). Effect of TJ-43 on HSP60 expression in IEC-6 cells was evaluated by immunoblot analysis. The effect of TJ-43 on cytoprotective abilities of IEC-6 cells against hydrogen peroxide or indomethacin was studied by MTT assay, LDH-release assay, caspase-8 activity, and TUNEL. HSP60 was significantly induced by TJ-43. Cell necrosis and apoptosis were significantly suppressed in IEC-6 cells pretreated by TJ-43 with overexpression of HSP60. Our results suggested that HSP60 induced by TJ-43 might play an important role in protecting small intestinal epithelial cells from apoptosis and necrosis in vitro.

Hepatocyte growth factor stimulates invasion across reconstituted basement membranes by a new human small intestinal cell line

1994 ◽  
Vol 12 (2) ◽  
pp. 143-154 ◽  
Author(s):  
Iruvanti Sunitha ◽  
Deborah L. Meighen ◽  
Dan -Paul Hartman ◽  
Erik W. Thompson ◽  
Stephen W. Byers ◽  
...  
Keyword(s):  
Growth Factor ◽  
Hepatocyte Growth Factor ◽  
Cell Line ◽  
Basement Membranes ◽  
Intestinal Cell ◽  
Intestinal Cell Line ◽  
Small Intestinal ◽  
Hepatocyte Growth

scholarly journals Preliminary Characterization of the Transcriptional Response of the Porcine Intestinal Cell Line IPEC-J2 to EnterotoxigenicEscherichia coli,Escherichia coli, andE. coliLipopolysaccharide

2010 ◽  
Vol 2010 ◽  
pp. 1-11 ◽  
Author(s):  
Marisa M. Geens ◽  
Theo A. Niewold
Keyword(s):  
Escherichia Coli ◽  
Cell Line ◽  
Transcriptional Response ◽  
Intestinal Cell ◽  
Adhesion Assay ◽  
Transcriptional Level ◽  
Suitable Model ◽  
E Coli ◽  
Intestinal Cell Line

IPEC-J2, a promisingin vitromodel system, is not well characterized especially on the transcriptional level, in contrast to human counterparts. The aim of this study was to characterize the gene expression in IPEC-J2 cells when coincubated with enterotoxigenicEscherichia coli(ETEC), nonpathogenicE. coli, andE. coliendotoxin. Apical infection of polarized IPEC-J2 monolayers caused a time-dependent decrease in transepithelial electrical resistance (TEER). Microarray analysis showed up-regulation of interleukins when IPEC-J2 were cocultured withE. colistrains this has so far never been measured in this cell line. Highest IL8 expression was found with the ETEC strain possessing the F4 fimbrium, suggesting IPEC-J2 cells to be F4 receptor positive, confirmed in a brush border membrane adhesion assay. It is concluded that the innate immune responses to pathogens and LPS makes the IPEC-J2 cell line a suitable model for research on intestinal host pathogen interaction.

Differentiation of rat small intestinal epithelial cells by extracellular matrix

1988 ◽  
Vol 254 (3) ◽  
pp. G355-G360 ◽  
Author(s):  
K. M. Carroll ◽  
T. T. Wong ◽  
D. L. Drabik ◽  
E. B. Chang
Keyword(s):  
Extracellular Matrix ◽  
Basement Membrane ◽  
Glucose Absorption ◽  
Cell Maturation ◽  
Intestinal Cell ◽  
Synthetic Activity ◽  
Intestinal Epithelial ◽  
Intestinal Cell Line ◽  
Small Intestinal

The role of extracellular matrix as a determinant of intestinal cell maturation was explored by growing a normal, but immature, rat small intestinal cell line (IEC-6) on basement membrane extract from Engelbreth-Holm-Swarm (EHS) sarcoma cells (ECM). Grown on plastic or glass, these cells are relatively immature and proliferate rapidly. In contrast, cells on ECM attached more rapidly, stopped proliferating, and rapidly organized into multicellular complex structures. Ultrastructurally, cells grown on ECM displayed significantly more mitochondria, rough endoplasmic reticulum, apical microvilli, and complex golgi apparatus, consistent with greater maturity and synthetic activity. By indirect immunofluorescence, sucrase, alkaline phosphatase, and cellular apolipoprotein B were present in cells grown on ECM only. In contrast to cells grown on glass, these cells also demonstrated Na-dependent glucose absorption, a function unique to mature villus cells (7). We conclude that the basement membrane may be a key determinant of intestinal epithelial cell maturation. The development of a mature villuslike intestinal cell in vitro may have wide application for future studies of induction and regulation of intestinal maturation and function.

Chloride transport in the small intestinal cell line IEC-18

2003 ◽  
Vol 124 (4) ◽  
pp. A309
Author(s):  
Srisaila Basavappa ◽  
Steven Coon ◽  
Uma Sundaram
Keyword(s):  
Cell Line ◽  
Chloride Transport ◽  
Intestinal Cell ◽  
Intestinal Cell Line ◽  
Small Intestinal
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