scholarly journals Physiological Significance of Ion Transporters and Channels in the Stomach and Pathophysiological Relevance in Gastric Cancer

2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Dumin Yuan ◽  
Zhiyuan Ma ◽  
Biguang Tuo ◽  
Taolang Li ◽  
Xuemei Liu
Keyword(s):  
Gastric Cancer ◽  
Epithelial Cells ◽  
Ion Transport ◽  
Gastric Acid ◽  
Malignant Disease ◽  
Chronic Atrophic Gastritis ◽  
Ion Transporters ◽  
Barrier Dysfunction ◽  
Acid Base ◽  
Plasma Membrane Permeability

Gastric cancer (GC) is a highly invasive and fatal malignant disease that accounts for 5.7% of new global cancer cases and is the third leading cause of cancer-related death. Acid/base homeostasis is critical for organisms because protein and enzyme function, cellular structure, and plasma membrane permeability change with pH. Various ion transporters are expressed in normal gastric mucosal epithelial cells and regulate gastric acid secretion, ion transport, and fluid absorption, thereby stabilizing the differentiation and homeostasis of gastric mucosal epithelial cells. Ion transporter dysfunction results in disordered ion transport, mucosa barrier dysfunction, and acid/base disturbances, causing gastric acid-related diseases such as chronic atrophic gastritis (CAG) and GC. This review summarizes the physiological functions of multiple ion transporters and channels in the stomach, including Cl− channels, Cl−/HCO3− exchangers, sodium/hydrogen exchangers (NHEs), and potassium (K+) channels, and their pathophysiological relevance in GC.

Regulation of Ion Transport by the NHERF Family of PDZ Proteins

Physiology ◽  
2004 ◽  
Vol 19 (6) ◽  
pp. 362-369 ◽  
Author(s):  
Shirish Shenolikar ◽  
James W. Voltz ◽  
Rochelle Cunningham ◽  
Edward J. Weinman
Keyword(s):  
Membrane Proteins ◽  
Epithelial Cells ◽  
Ion Transport ◽  
Ion Homeostasis ◽  
Ion Transporters ◽  
Pdz Proteins ◽  
The Past

NHERFs are the best-studied apical PDZ proteins that are highly expressed in epithelial cells. Molecular and cellular studies over the past decade show that NHERFs regulate the targeting or trafficking of ion transporters and other membrane proteins and transduce physiological and pathophysiological signals that regulate ion homeostasis in mammals.

Are Surface Epithelial Cells Necessary for Gastric Acid Secretion?

1959 ◽  
Vol 37 (2) ◽  
pp. 158-163 ◽  
Author(s):  
Horace W. Davenport ◽  
Ruth Allen
Keyword(s):  
Epithelial Cells ◽  
Acid Secretion ◽  
Gastric Acid Secretion ◽  
Gastric Acid

scholarly journals Pectin limits epithelial barrier disruption by Citrobacter rodentium through anti-microbial effects

2021 ◽  
Author(s):  
M. Beukema ◽  
K. Ishisono ◽  
J. de Waard ◽  
M. M. Faas ◽  
P. de Vos ◽  
...  
Keyword(s):  
Epithelial Cells ◽  
Epithelial Barrier ◽  
Citrobacter Rodentium ◽  
Barrier Dysfunction ◽  
Antimicrobial Effects ◽  
Barrier Disruption ◽  
Microbial Effects

Pectins inhibit the growth of C. rodentium in vitro, preventing attachment of C. rodentium to CMT93 epithelial cells. Through these antimicrobial effects, pectins protect the epithelium from C. rodentium-induced barrier dysfunction and damage.

scholarly journals miR-21 Is a Promising Novel Biomarker for Lymph Node Metastasis in Patients with Gastric Cancer

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Yuejuan Xu ◽  
Jue Sun ◽  
Jianhua Xu ◽  
Qi Li ◽  
Yuewu Guo ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Lymph Node ◽  
Lymph Node Metastasis ◽  
Malignant Disease ◽  
Close Association ◽  
Survival Rates ◽  
Expression Level ◽  
Human Gastric Cancer ◽  
Node Metastasis ◽  
Kaplan Meier

Background. Gastric cancer (GC) is an important malignant disease around the world. Abnormalities of microRNAs (miRNAs) have been implicated in carcinogenesis of various cancers. In the present study, we examined miR-21 expression in human gastric cancer with lymph node metastasis and attempted to uncover its relationship with clinicopathologic data, especially with lymph node metastasis.Materials and Methods. The expression levels of miR-21 in the tumor specimens of GC patients were quantified by RT-PCR. The correlation between miR-21 level and multiple clinicopathological factors was then examined by Mann-Whitney test, Kaplan-Meier survival analysis, and operating characteristic (ROC) analysis.Results. The expression level of miR-21 was higher in GC patients with lymph node metastasis than in those without lymph node metastasis (P<0.05). Expression level of miR-21 was significantly correlated with histologic type, T stage, lymph node metastasis and pTNM stage. The overall survival rates in GC patients with low upregulated miR-21 expression were significantly higher than those with high upregulated miR-21 (P<0.05).Conclusion. A close association is implicated between the elevated miR-21and lymph node metastasis, which could potentially be exploited as a practical biomarker for lymph node metastasis in patients with GC.

The Effect of the Change in Lymph Flow Following Gastrectomy for Initial Disease on the Prognosis of Remnant Gastric Cancer

2021 ◽  
Author(s):  
Yoshihiko Kakiuchi ◽  
Satoru Kikuchi ◽  
Shinji Kuroda ◽  
Masahiko Nishizaki ◽  
Shunsuke Kagawa ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Lymph Node ◽  
Poor Prognosis ◽  
Malignant Disease ◽  
Univariate Analysis ◽  
Lymph Flow ◽  
University Hospital ◽  
Gastric Disease ◽  
Remnant Gastric Cancer ◽  
Initial Surgery

Abstract Background: Remnant gastric cancer (RGC) has been increasing for various reasons such as longer life span, medical progress, and others. It generally has a poor prognosis, and its mechanism of occurrence is unknown. The purpose of this study was to evaluate the clinicopathological features of and clarify the prognostic factors of RGC.Methods: Between January 2002 and January 2017, 39 patients with RGC following distal gastrectomy underwent curative surgical resection at the Okayama University Hospital; their medical records and immunohistochemically stained extracted specimens were used for retrospective analysis. Results: On univariate analysis, initial gastric disease, pathological lymph node metastasis, and pathological stage were the significant factors associated with a poor overall survival (OS) (p=0.0139, 0.0061, and 0.0158, respectively). Multivariate analysis of these 3 factors showed that only initial gastric disease caused by malignant disease was an independent factor associated with a poor prognosis (p=0.0141, odds ratio [OR]:4.151, 95% confidence interval [CI]:1.333-12.93). In addition, the presence of a left gastric artery (LGA), and tumor-infiltrating CD8+ T cell expression were higher in the benign disease group than in the malignant group (p<0.0001 and p=0.0485, respectively).Conclusion: The lymph flow change caused by lymph node dissection for malignant disease in initial surgery might have an effect on the suppression of tumor immunity and the poor prognosis of RGC.

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