Abstract:
:The fact that the acid-secreting parietal cells undergo continuous renewal has been ignored by many gastroenterologists and cell biologists. In the past, it was thought that these cells were static. However, by using (3)H-thymidine radioautography in combination with electron microscopy, it was possible to demonstrate that parietal cells belong to a continuously renewing epithelial cell lineage. In the gastric glands, stem cells anchored in the isthmus region are responsible for the production of parietal cells. The stem cells give rise to three main progenitors: prepit, preneck and preparietal cells. Parietal cells develop either directly from the non-cycling preparietal cells or less commonly via differentiation of the cycling prepit and preneck cell progenitors. The formation of a parietal cell is a sequential process which involves diminishment of glycocalyx, production of cytoplasmic tubulovesicles, an increase in number and length of microvilli, an increase in number and size of mitochondria, and finally, expansion and invagination of the apical membrane with the formation of an intracellular canalicular system. Little is known about the genetic counterparts of these morphological events. However, the time dimension of parietal cell production and the consequences of its alteration on the biological features of the gastric gland are well documented. The production of a new parietal cell takes about 2 d. However, mature parietal cells have a long lifespan during which they migrate bi-directionally while their functional activity for acid secretion gradually diminishes. Following an average lifespan of about 54 d, in mice, old parietal cells undergo degeneration and elimination. Various approaches for genetic alteration of the development of parietal cells have provided evidence in support of their role as governors of the stem/progenitor cell proliferation and differentiation programs. Revealing the dynamic features and the various roles of parietal cells would help in a better understanding of the biological features of the gastric glands and would hopefully help in providing a basis for the development of new strategies for prevention, early detection and/or therapy of various gastric disorders in which parietal cells are involved, such as atrophic gastritis, peptic ulcer disease and gastric cancer.
journal_name
World J Gastroenteroljournal_title
World journal of gastroenterologyauthors
Karam SMdoi
10.3748/wjg.v16.i5.538subject
Has Abstractpub_date
2010-02-07 00:00:00pages
538-46issue
5eissn
1007-9327issn
2219-2840journal_volume
16pub_type
社论abstract:AIM:To explore the regulator of G-protein signaling 5 (RGS5) expression in gastric carcinoma and its association with differentiation and microvascular density (MVD). METHODS:Expression of RGS5 and CD34 were examined in 76 cases of gastric carcinoma, including 22 cases with lymph node metastasis and 54 cases without l...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v16.i44.5642
更新日期:2010-11-28 00:00:00
abstract:AIM:Because of a major resistance to chemotherapy, prognosis of hepatocellular carcinoma (HCC) is still poor. New treatments are required and gene therapy may be an option. Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) induces apoptosis in multiple malignant tumors, and using adenoviral vectors has sh...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v11.i17.2552
更新日期:2005-05-07 00:00:00
abstract:AIM:To identify the diagnostic value of colonoscopy for diverticulosis as determined by barium enema. METHODS:A total of 65 patients with hematochezia who underwent colonoscopy and barium enema were analyzed, and the diagnostic value of colonoscopy for diverticula was assessed. The receiver operating characteristic ar...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v19.i15.2362
更新日期:2013-04-21 00:00:00
abstract:AIM:To assess numbers and case fatality of patients with upper gastrointestinal bleeding (UGIB), effects of deprivation and whether weekend presentation affected outcomes. METHODS:Data was obtained from Information Services Division (ISD) Scotland and National Records of Scotland (NRS) death records for a ten year per...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v21.i38.10890
更新日期:2015-10-14 00:00:00
abstract:AIM:A single-chain antibody fragment, ND-1scFv, against human colorectal carcinoma was constructed and expressed in E.coli, and its biodistribution and pharmacokinetic properties were studied in mice bearing tumor. METHODS:V(H) and V(L) genes were amplified from hybridoma cell IC-2, secreting monoclonal antibody ND-1,...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v9.i4.726
更新日期:2003-04-01 00:00:00
abstract::Although gastric cancer (GC) is one of the leading causes of cancer-related death, major therapeutic advances have not been made, and patients with GC still face poor outcomes. The prognosis of GC also remains poor because the molecular mechanisms of GC progression are incompletely understood. MicroRNAs (miRNAs) are n...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v20.i19.5694
更新日期:2014-05-21 00:00:00
abstract::A 33-year-old woman who presented with epigastric discomfort and diarrhea underwent an abdominal ultrasound (US). This investigation and subsequent contrast-enhanced computed tomography, magnetic resonance imaging and endoscopic US with fine needle aspiration (FNA) revealed a 40 mm well-circumscribed mass in the uncin...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.15.4334
更新日期:2009-09-14 00:00:00
abstract:AIM:To confirm if p53 mutation could be a routine predictive marker for the prognosis of hepatocellular carcinoma (HCC) patients. METHODS:Two hundreds and forty-four formalin-fixed paraffin-embedded tumor samples of the patients with HCC receiving liver resection were detected for nuclear accumulation of p53. The perc...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v8.i3.459
更新日期:2002-06-01 00:00:00
abstract::Helicobacter pylori (H pylori) infection is the main cause of gastritis, gastroduodenal ulcer disease, and gastric cancer. After more than 20 years of experience in H pylori treatment, in my opinion, the ideal regimen to treat this infection is still to be found. Currently, apart from having to know first-line eradica...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.14.5385
更新日期:2008-09-21 00:00:00
abstract::Primary hepatic neuroendocrine tumor (PHNET) is an extremely rare liver tumor. Patients often have no clinical symptoms or have only non-specific symptoms, such as abdominal pain and abdominal mass. The clinical manifestations, disease development, treatment methods, and treatment outcomes of PHNET vary greatly among ...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v24.i24.2640
更新日期:2018-06-28 00:00:00
abstract:AIM:To investigate the outcome of repeating endoscopic retrograde cholangiopancreaticography (ERCP) after initially failed precut sphincterotomy to achieve biliary cannulation. METHODS:In this retrospective study, consecutive ERCPs performed between January 2009 and September 2012 were included. Data from our endoscop...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v20.i36.13153
更新日期:2014-09-28 00:00:00
abstract:AIM:To investigate whether alphastatin could inhibit human gastric cancer growth and furthermore whether sphingosine kinase (SPK) activity is involved in this process. METHODS:Using migration assay, MTT assay and Matrigel assay, the effect of alphastatin on vascular endothelial cells (ECs) was evaluated in vitro. SPK ...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v12.i26.4130
更新日期:2006-07-14 00:00:00
abstract::Solitary fibrous tumors are predominantly benign and are most commonly found in the thoracic cavity and pleura; while reports exist in the literature of malignant solitary fibrous tumors and those located in extrathoracic organs, these cases are considered extremely rare. Herein, a case is reported of a malignant soli...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v19.i21.3354
更新日期:2013-06-07 00:00:00
abstract::Pancreatic cancer is one of the deadliest cancers, ranking fourth among cancer-related deaths. Despite all the major molecular advances and treatment breakthroughs, mainly targeted therapies, the cornerstone treatment of metastatic pancreatic cancer (mPC) remains cytotoxic chemotherapy. In 2016, more than 40 years aft...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v22.i46.10124
更新日期:2016-12-14 00:00:00
abstract:AIM:To elucidate the role and alterations of syndecan-1 and E-cadherin expression in different cellular phenotypes of differentiated-type gastric cancers (DGCs). METHODS:A total of 120 DGCs at an early stage, and their adjacent mucosa, were studied both by immunohistochemistry. Syndecan-1 and E-cadherin were assessed ...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v11.i19.2975
更新日期:2005-05-21 00:00:00
abstract:AIM:To assess the practically usefulness and diagnostic yield of this new method in a group of patients with suspected small bowel lesions. METHODS:Capsule endoscopic (CE) examination by using M2A capsule endoscope TM (Given Imaging, Yoqneam, Israel) was performed in thirty nine patients (26 males, 13 females) with su...
journal_title:World journal of gastroenterology
pub_type: 临床试验,杂志文章
doi:10.3748/wjg.v12.i24.3906
更新日期:2006-06-28 00:00:00
abstract:AIM:To assess the importance of preoperative diagnosis and presentation of left-sided gallbladder using ultrasound (US), CT and angiography. METHODS:Retrospective review of 1482 patients who underwent enhanced CT scanning was performed. Left-sided gallbladder was diagnosed if a right-sided ligamentum teres was present...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v13.i47.6404
更新日期:2007-12-21 00:00:00
abstract::Crohn's disease (CD) is a chronic inflammatory disease of the digestive tract with systemic manifestations. Etiology is unknown, even if immunological, genetic and environmental factors are involved. The majority of CD patients require surgery during their lifetime due to progressive bowel damage, but, even when all m...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v17.i27.3213
更新日期:2011-07-21 00:00:00
abstract:AIM:To assess the endoscopic activity before and after a one-year period of biological therapy and to evaluate the frequency of relapses and need for retreatment after stopping the biologicals in patients with Crohn's disease (CD) and ulcerative colitis (UC). METHODS:The data from 41 patients with CD and 22 patients w...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,多中心研究
doi:10.3748/wjg.v20.i11.2995
更新日期:2014-03-21 00:00:00
abstract:AIM:To assess the utility of contrast-enhanced ultrasonography (CEUS) with a second-generation contrast medium in the differential diagnosis between mass-forming pancreatitis and pancreatic carcinoma. METHODS:From our radio-pathology database, we retrieved all the patients affected by mass-forming pancreatitis or panc...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v12.i26.4181
更新日期:2006-07-14 00:00:00
abstract:AIM:To investigate the utility of K-ras mutation analysis of ultrasound guided fine-needle aspirate biopsy of pancreatic masses. METHODS:Sixty-six ultrasound guided fine-needle biopsies were evaluated by cytology, histology and k-ras mutation. The mutation at codon 12 of the k-ras oncogene was detected by artificial r...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v9.i1.188
更新日期:2003-01-01 00:00:00
abstract:AIM:The use of low-dose aspirin to prevent cardiovascular disease events is well established. However, the incidence and predictors of upper gastrointestinal bleeding (UGIB) with its use are unknown. We studied prospectively the incidence and outcome of peptic ulceration in low-dose aspirin users. METHODS:A total of 9...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v12.i18.2923
更新日期:2006-05-14 00:00:00
abstract:AIM:To compare the efficacy and safety of a hook knife (HO) with a hybrid knife (HK) during endoscopic submucosal tunnel dissection (ESTD) procedure. METHODS:Between August 2012 and December 2015, the ESTD procedure was performed for 83 upper GI submucosal lesions, which originated from the muscularis propria layer id...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v23.i10.1843
更新日期:2017-03-14 00:00:00
abstract::Hepatocellular carcinoma (HCC) is the most common primary liver cancer with a dismal prognosis, especially when diagnosed at advanced stages. Annexin A2 (ANXA2), is found to promote cancer progression and therapeutic resistance. However, the underlining mechanisms of ANXA2 in immune escape of HCC remain poorly underst...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v26.i18.2126
更新日期:2020-05-14 00:00:00
abstract::The incidence of colonic diverticulosis with or without diverticulitis has increased in the Japanese population due to the modernization of food and aging. The rate of diverticulitis in colon diverticulosis ranges from 8.1% to 9.6%. However, few cases of stenosis due to diverticulitis have been reported. These reports...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v18.i27.3623
更新日期:2012-07-21 00:00:00
abstract:AIM:To evaluate the expressions of apoptotic signal proteins FADD, TRADD, FasL, Fas, and NFkappaB in gastric carcinoma tissues and their clinical significance. METHODS:Western blot immune trace method was adopted to detect the expressions of apoptotic signal proteins FADD, TRADD, FasL, Fas, and NFkappaB in 55 tissue s...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v11.i25.3846
更新日期:2005-07-07 00:00:00
abstract:AIM:To compare the number of regulatory T-cells (Tregs) measured by flow cytometry with those obtained using a real-time quantitative PCR (qPCR) method in patients suffering from inflammatory bowel disease (IBD). METHODS:Tregs percentages obtained by both flow cytometry and qPCR methods in 35 adult IBD patients, 18 ou...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v21.i11.3325
更新日期:2015-03-21 00:00:00
abstract::The origin of inflammatory bowel disease is unknown. Attempts have been made to isolate a microorganism that could explain the onset of inflammation, but no pathological agent has ever been identified. Johne's disease is a granulomatous chronic enteritis of cattle and sheep caused by Mycobacterium avium subspecies par...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v20.i36.13060
更新日期:2014-09-28 00:00:00
abstract::Recent advances in techniques of therapeutic endoscopy for stomach neoplasms are rapidly achieved. One of the major topics in this field is endoscopic submucosal dissection (ESD). ESD is a new endoscopic technique using cutting devices to remove the tumor by the following three steps: injecting fluid into the submucos...
journal_title:World journal of gastroenterology
pub_type: 社论,评审
doi:10.3748/wjg.v12.i32.5108
更新日期:2006-08-28 00:00:00
abstract:AIM:To identify the incidence and etiology of anemia after gastrectomy in patients with long-term follow-up after gastrectomy for early gastric cancer. METHODS:The medical records of those patients with early gastric adenocarcinoma who underwent curative gastrectomy between January 2006 and October 2007 were reviewed....
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v18.i42.6114
更新日期:2012-11-14 00:00:00