Spontaneous neoplasia of the intestinal tract in sentinel and moribund zebrafish Danio rerio is common in some zebrafish facilities. We previously classified these tumors as adenocarcinoma, small-cell carcinoma, or carcinoma otherwise unspecified based on histomorphologic characteristics. Based on histological presentation, the primary differential diagnosis for the intestinal carcinomas was tu...

Lynch syndrome is an autosomal-dominant disorder caused by defective DNA mismatch repair (MMR) genes and is associated with increased risk of malignancies in multiple organs. Small-intestinal adenocarcinomas are common initial manifestations of Lynch syndrome. To define the incidence and characteristics of Lynch syndrome-related small-intestinal adenocarcinomas, meticulous familial and clinical...

Objective(s): Intestinal ischemia-reperfusion is a major problem, which may lead to multiorgan failure and death. The aim of this study was to evaluate the protective effects of dexmedetomidine on cell proliferation, antioxidant system, cell death, and structural integrity in intestinal injury induced by ischemia-reperfusion in rats. Materials and Methods: Animals were randomized into three gro...

Inflammatory bowel disease, mainly Crohn's disease and ulcerative colitis, are characterized by epithelial barrier disruption and altered immune regulation. Colonic Ste20-like proline/alanine-rich kinase (SPAK) plays a role in intestinal inflammation, but its underlying mechanisms need to be defined. Both SPAK-transfected Caco2-BBE cells and villin-SPAK transgenic (TG) FVB/6 mice exhibited loss...

Intestinal cancers are a category of heterogeneous tumors that occur sporadically or through inherited susceptibility, each characterized by genetic alterations affecting a number of molecular pathways. As a result of this complexity, numerous genetically engineered mice (GEM) have been generated to model different genetic, morphologic, or clinical features of intestinal cancer. Mouse models of...

There are five possible processes of intestinal absorption of xenobiotics. These are active transport, passive diffusions, pinocytosis, filtration through "pores," and lymphatic absorption. The passive diffusion is major process for transport of foreign chemicals across the intestine. Though the lymphatic absorption of drugs is not of any major therapeutic significance, the uptake of toxic chem...

Intestinal absorption and excretion are the main regulatory mechanisms for maintenance of body homeostasis of most trace elements. In spite of considerable research on trace element metabolism in man and experimental animals, the knowledge about the mechanisms involved in these processes is still limited. The characteristics of trace element metabolism, such as low fractional absorption, the pr...

AIM To study the HER2 gene amplification or overexpression in patients with advanced gastric cancer (GC) and their association with patient characteristics and patient survival. PATIENTS AND METHODS Tumour tissue samples from 148 patients with advanced GC were studied for HER2 by immunohistochemistry (IHC), fluorescence in situ hybridisation (FISH) and dual colour silver enhanced in situ hybr...

The aim of this study was to describe epidemiologic characteristics of intestinal parasites in a population in south of Tehran, Iran. A retrospective cross-sectional study of patients with suspicious intestinal parasitic infections referred to the Zakaria Razi Laboratory in Shahre-Ray, southern Tehran, Iran, was conducted from April 21, 2004 to October 20, 2005. All stool samples were examined ...

The purpose of this study was to determine the characteristics of intestinal absorption and metabolism of 5-aminosalicylic acid (5ASA). Regional perfusions of 5ASA in the anesthetized rat resulted in the appearance of N-acetyl-5-aminosalicylic acid in the intestinal lumen. Lumenal metabolite appearance was proportional to 5ASA permeability, which was 5-fold higher in the jejunum than in the ile...