[show abstract][hide abstract] ABSTRACT: 3 F undic gland polyps (FGPs) are currently the most common type of gastric polyps found on upper endoscopy. These polyps can be sporadic or can be associated with an inherited polyposis syndrome. The prevalence of FGPs appears to be on the rise. This has partly been attributed to the expanded use of upper endoscopy, the increasing use of acid suppressive medica- tions, and the decreasing prevalence of Helicobacter pylori infection. This case report begins with the case of a patient found to have FGPs and then outlines the features, preva- lence, pathogenesis, and management of FGPs.
Gastroenterology and Hepatology 01/2010; 6(1):45-8.
[show abstract][hide abstract] ABSTRACT: Mesenteric vascular disease has been diagnosed increasingly over the past 25 years. This rise in incidence has been attributed to the advanced mean age of the population, an increasing number of critically ill patients and a greater clinical recognition of the condition. Although surgical revascularization and resection has long been the standard of treatment, medical management can also play an important adjunctive role. Early diagnosis before irreversible bowel damage, which may occur within 6-8 hours after the insult, is necessary to improve survival and reduce morbidity. Even in the presence of irreversible bowel ischemia, perioperative medical treatment may reduce disease progression, enabling more limited bowel resection. This article outlines the appropriate pharmacologic management of ischemic disorders of the intestine, with an emphasis on the pharmacologic treatments presently being used in clinical practice and those being studied in the laboratory.
[show abstract][hide abstract] ABSTRACT: Nitric oxide-releasing aspirin (NO-ASA) is emerging as a potentially important chemopreventive agent against colon cancer. We examined in HT-29 human colon adenocarcinoma cells the effect of NO-ASA on the inducible form of nitric oxide synthase (NOS2), an enzyme implicated in colon carcinogenesis. NO-ASA inhibited in a time- and concentration-dependent manner the expression of NOS2 up to 70% compared to control (IC50 for this effect = 46 microM). NO-ASA also decreased the corresponding steady-state mRNA levels and this reduction preceded the reduction of protein levels by at least 6 h. NO-ASA also reduced the enzymatic activity of NOS2, as determined by a direct enzyme assay (maximal reduction = 80%) and by determining the accumulation of NO in the culture medium (IC50 for this effect = 36 microM). These effects of NO-ASA on NOS2 were paralleled by inhibition in cell growth (IC50 = 8.5 microM). These findings indicate that NO-ASA profoundly inhibits both the expression and enzymatic activity of NOS2 and suggest that these effects may represent an important mechanism for the colon cancer chemopreventive effect of NO-ASA.