Abstract:
AIM:To test the activities of culture-extracted or commercially available toll-like receptors (TLRs) ligands to establish their direct impact on target gastrointestinal motor cells. METHODS:Short-term and long-term effects of Shigella flexneri M90T and Escherichia coli K-2 strains-extracted lipopolysaccharides (LPS), commercially highly purified LPS (E. coli O111:B4 and EH100), and Pam2CSK4 and Pam3CSK4, which bind TLR2/6 and TLR1/2 heterodimers, respectively, have been assessed on pure primary cultures of colonic human smooth muscle cells (HSMC). RESULTS:Pathogenic Shigella-LPS and nonpathogenic E. coli K-2-LPS induced a time-dependent decrease of resting cell length and acetylcholine-induced contraction, with both alterations occurring rapidly and being more pronounced in response to the former. However, their effects differed, prolonging HSMC exposure with Shigella-LPS effects maintained throughout the 4 hours of observation compared with E. coli K-2-LPS, which disappeared after 60 minutes of incubation. Similar differences in magnitude and time dependency of myogenic effects were observed between pure TLR4 and TLR2/1 or TLR2/6 ligands. The specific activation of TLR4 with LPS from pathogen or nonpathogen E. coli, O111:B4 and EH100, respectively, induced smooth muscle alterations that progressively increased, prolonging incubation, whereas TLR2 ligands induced short-term alterations, of a lesser magnitude, which decreased over time. The real-time polymerase chain reaction analysis showed that HSMC express mRNA for TLR1, 2, 4, and 6, substantiating a direct effect of TLR ligands on human colonic smooth muscle. CONCLUSIONS:This study highlights that bacterial products can directly affect gastrointestinal motility and that TLRs subtypes may differ in their cellular activity.
journal_name
J Clin Gastroenteroljournal_title
Journal of clinical gastroenterologyauthors
Tattoli I,Petitta C,Scirocco A,Ammoscato F,Cicenia A,Severi Cdoi
10.1097/MCG.0b013e318265ea7dsubject
Has Abstractpub_date
2012-10-01 00:00:00pages
S6-11eissn
0192-0790issn
1539-2031pii
00004836-201210001-00004journal_volume
46 Supplpub_type
杂志文章abstract::Immunoproliferative small intestinal disease (IPSID) is a rare lympho-proliferative disorder of the upper small intestine. It is considered a special form of MALT lymphoma with propensity to malignant transformation. This disorder is rare in pediatric literature. We report a case of IPSID in a 16-year-old boy with low...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章
doi:10.1097/00004836-199807000-00020
更新日期:1998-07-01 00:00:00
abstract::Severe sepsis with associated multisystem organ dysfunction is a leading cause of death in patients hospitalized in intensive care units. The gastrointestinal system plays a key role in the pathogenesis of multisystem organ dysfunction owing to a breakdown of intestinal barrier function and increased translocation of ...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章,评审
doi:10.1097/MCG.0b013e31817283cb
更新日期:2008-09-01 00:00:00
abstract::Patients affected by uncomplicated diverticular disease (DD) suffer from colicky, unexplained, recurrent, and short-lived but often debilitating abdominal pain and alteration in bowel habit. Although the goals of therapy, such as to improve symptoms and to prevent both recurrent attacks and complications, are clearly ...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章,评审
doi:10.1097/MCG.0b013e3181b3ab2e
更新日期:2009-10-01 00:00:00
abstract::Disposable biopsy forceps have recently been introduced into the field of endoscopy. We have analyzed biopsy size and histologic interpretation of samples obtained with the disposable forceps and compared them to those obtained with reusable forceps. In the 18 patients studied, 49 samples were collected with the reusa...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章
doi:
更新日期:1991-02-01 00:00:00
abstract::The role of lipid peroxidation and endogenous oxygen-derived free radical scavengers on ischemia-reperfusion injury and tissue recovery in rat ulcer model corresponding to the gastric histopathology was investigated. Male Wistar rats weighting 200-250 g were heparinized before occlusion of the celiac axis for 1.5 h. E...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章
doi:10.1097/00004836-199001001-00011
更新日期:1990-01-01 00:00:00
abstract:BACKGROUND AND GOALS:Chronic inflammation associated with Helicobacter pylori infection is a risk factor of gastric adenocarcinoma. Interleukin-8 (IL-8) plays an important role in gastric mucosal inflammation induced by H. pylori infection. Recently, studies on the association of genetic polymorphisms of various proinf...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章
doi:10.1097/MCG.0b013e3181646701
更新日期:2009-03-01 00:00:00
abstract::Extracorporeal shock wave lithotripsy (ESWL) of gallstones is a new and experimental treatment. Recent data seem to indicate that the use of ursodeoxycholic acid (UDCA) after ESWL may optimize the results of the shock wave treatment. Most of the published data on the clinical use of such therapy emanate from two studi...
journal_title:Journal of clinical gastroenterology
pub_type: 临床试验,杂志文章,评审
doi:
更新日期:1988-01-01 00:00:00
abstract:BACKGROUND:After radiation treatment of head and neck cancer, placement of gastrostomy feeding tubes can be technically difficult. The practice of placing tubes before treatment is probably justified if the tube is used for more than 4 weeks and if complications are infrequent. The aim of this study was to determine th...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章
doi:10.1097/00004836-200109000-00009
更新日期:2001-09-01 00:00:00
abstract:BACKGROUND AND AIMS:Current methods to diagnose malignant biliary strictures are of low sensitivity. Confocal endomicroscopy is a new approach that may improve the diagnosis of indeterminate biliary strictures. The purpose of this study was to evaluate indeterminate biliary strictures using probe-based confocal laser e...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章
doi:10.1097/MCG.0b013e3181fbdc38
更新日期:2011-03-01 00:00:00
abstract:GOALS:To evaluate the effects of probucol, an agent with strong antioxidant properties, in reversing biochemical changes in nonalcoholic steatohepatitis (NASH). BACKGROUND:There is currently no well-established medical treatment of NASH. It is believed that oxidative stress plays a major role in hepatic damage in thes...
journal_title:Journal of clinical gastroenterology
pub_type: 临床试验,杂志文章
doi:10.1097/00004836-200303000-00015
更新日期:2003-03-01 00:00:00
abstract::The methods used to discern the structure (anatomy) and function (physiology) of the indigenous microbiota can be divided according to which aspect of the microbiota they can interrogate and are positioned accordingly. At the most basic level, methods can simply describe the community structure of the microbiota, that...
journal_title:Journal of clinical gastroenterology
pub_type:
doi:10.1097/MCG.0000000000001106
更新日期:2018-11-01 00:00:00
abstract:BACKGROUND/AIMS:The aim of this exploratory trial was to establish if the probiotic Bifidobacterium natren life start (NLS) strain strain may affect the clinical course and pathophysiological features of patients with untreated celiac disease (CD). Positive findings would be helpful in directing future studies. METHOD...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章,随机对照试验
doi:10.1097/MCG.0b013e31827759ac
更新日期:2013-02-01 00:00:00
abstract::To investigate the influence of the brain-gut interactions on the pathophysiology of irritable bowel syndrome (IBS), we compared such patients (n = 10) with healthy control subjects (n = 11) by measuring the pressure of the colon and small intestine simultaneously with analysis of power spectrum of the electroencephal...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章
doi:10.1097/00004836-199309000-00009
更新日期:1993-09-01 00:00:00
abstract::A man who previously had several episodes of upper gastrointestinal hemorrhage from erosive gastritis developed recurrent hemorrhage. Endoscopy showed punctate hemorrhages in the fundus and body of the stomach, plus a discrete area of thickened folds in the anterior wall. Biopsies revealed a dense mucosal infiltrate t...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章,评审
doi:10.1097/00004836-199404000-00011
更新日期:1994-04-01 00:00:00
abstract:GOALS:We intended to identify the factors associated with missed appointments at a gastroenterology (GI) clinic in an academic setting. BACKGROUND:Missed clinic appointments reduce clinic efficiency, waste resources, and increase costs. Limited data exist on subspecialty clinic attendance. STUDY:We performed a case-c...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章
doi:10.1097/MCG.0000000000000706
更新日期:2017-05-01 00:00:00
abstract::Multiple biopsies were taken from the duodenum of 100 patients (46 active duodenal ulcer, 14 healed duodenal ulcer, 40 control subjects) to detect duodenitis, gastric metaplasia and Helicobacter pylori (Hp). Histamine-induced congo-red staining of the duodenal bulb was performed in additional 25 cases of active duoden...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章
doi:10.1097/00004836-199310000-00007
更新日期:1993-10-01 00:00:00
abstract::A patient with cirrhosis developed hemoperitoneum, lactic acidosis, and hyperphosphatemia in the absence of shock. At post-mortem examination occult multicentric hepatocellular carcinoma eroding the liver capsule was present. The case emphasizes the central role of the liver in lactic acidosis, indicates that hemoperi...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章
doi:10.1097/00004836-198604000-00025
更新日期:1986-04-01 00:00:00
abstract::Vitamin A intoxication was diagnosed in a 14-year-old girl who presented with massive exudative ascites and right pleural effusion, impaired liver enzymes, and hypertriglyceridemia. Electron microscopy of liver biopsy material demonstrated numerous perisinusoidal lipid-filled Ito cells. The patient had taken 100-200,0...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章
doi:10.1097/00004836-198508000-00016
更新日期:1985-08-01 00:00:00
abstract::Repeated surgical interventions on the biliary ductal system increase morbidity and mortality, particularly in the geriatric patient. In an attempt to prevent these complications, side-to-side choledochoduodenostomy was performed as the primary operative procedure in 54 patients, age 72 +/- 13 years. This was the pati...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章
doi:10.1097/00004836-199008000-00013
更新日期:1990-08-01 00:00:00
abstract::Gastric cancer is often diagnosed in middle-aged patients undergoing upper gastrointestinal endoscopy for abdominal complaints or constitutional symptoms, such as dyspepsia, vomiting or anorexia, weight loss, anemia, jaundice, and ascites. Sometimes, all of these symptoms may be absent, and gastric cancer is diagnosed...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章
doi:10.1097/00004836-200107000-00021
更新日期:2001-07-01 00:00:00
abstract::The goal of every routine endoscopy in the gut is the early diagnosis of malignant and premalignant changes of the mucosa. Chromo- and magnifying endoscopes are exciting new tools and offer detailed analysis of the colonic mucosal surface and pit pattern architecture. This review summarizes recent advances in endoscop...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章,评审
doi:10.1097/00004836-200401000-00004
更新日期:2004-01-01 00:00:00
abstract::During the past three decades, important advances in our understanding of the pathophysiology of chronic pancreatitis (CP), improved results of major pancreatic resections (including pancreatoduodenectomy), and integration of sophisticated diagnostic methods in clinical practice resulted in significant changes in our ...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章,评审
doi:10.1097/00004836-200201000-00014
更新日期:2002-01-01 00:00:00
abstract:GOAL:The goal of this study was to determine disparities in liver cancer surveillance among people with disabilities is the goal of this study. BACKGROUND:Using the linked administrative database in Korea, we sought to investigate (1) whether there are disparities in liver cancer surveillance according to degree and t...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章
doi:10.1097/MCG.0000000000001405
更新日期:2020-09-04 00:00:00
abstract::The epithelial cells of the stomach and duodenum are normally protected from the damaging effects of acid and pepsin by a balancing mechanism of mucosal resistance. If an imbalance occurs, peptic ulcer may result. Traditional teaching has emphasized the importance of acid (and pepsin) as the cause of this imbalance; h...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章,评审
doi:10.1097/00004836-199000000-00002
更新日期:1990-01-01 00:00:00
abstract:OBJECTIVES:To determine serum nitric oxide levels in pediatric patients with celiac disease and to compare them with the results obtained after 1 year of gluten-free diet. METHODS:We studied serum nitric oxide levels in 41 newly diagnosed patients with celiac disease. Serum levels of nitric oxide were reevaluated afte...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章
doi:10.1097/01.mcg.0000177240.67215.da
更新日期:2005-10-01 00:00:00
abstract:GOALS:To compare the healthcare resource consumption of patients who have irritable bowel syndrome (IBS) with an age-, gender-, and comorbidity-matched cohort of patients without IBS from a managed care perspective. STUDY:Retrospective cohort analysis. Data were obtained electronically through the Henry Ford Health Sy...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章
doi:10.1097/00004836-200207000-00005
更新日期:2002-07-01 00:00:00
abstract::Several epidemiologic studies of Crohn's Disease (CD) from the northern hemisphere show high rates of the disease among Jews. Israel has absorbed many Jews from those countries and the rates of CD in Israel are lower than in their place of birth. Important, too, among immigrants from the middle east Mediterranean coun...
journal_title:Journal of clinical gastroenterology
pub_type: 社论
doi:
更新日期:1992-12-01 00:00:00
abstract:GOALS:To evaluate the impact of age on the prognosis of patients with hepatocellular carcinoma (HCC) undergoing percutaneous radiofrequency ablation (RFA). BACKGROUND:Whether age plays an important role in the outcomes of HCC after RFA remains controversial. STUDY:Two hundred fifty-eight consecutive treatment naive H...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章
doi:10.1097/MCG.0b013e31822b36cc
更新日期:2012-01-01 00:00:00
abstract::There is a lack of consensus as to whether there is a difference in the amount of gastroesophageal reflux when lying with the right versus the left side down. In an attempt to answer this question we conducted a two-part study. The first consisted of a questionnaire distributed to 103 gastroenterologists with a specia...
journal_title:Journal of clinical gastroenterology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00004836-199406000-00004
更新日期:1994-06-01 00:00:00
abstract::Magnetic resonance cholangiopancreatography (MRCP) is a novel imaging technique used for noninvasive work-up of patients with pancreaticobiliary disease. Magnetic resonance cholangiopancreatography is useful in the evaluation of a host of pancreaticobiliary disorders, such as congenital disorders, calculus disease, bi...
journal_title:Journal of clinical gastroenterology
pub_type: 杂志文章,评审
doi:10.1097/00004836-200111000-00004
更新日期:2001-11-01 00:00:00