[Prognostic factors for malnutrition in patients with colorectal cancer].

Introduction: patients undergoing major abdominal surgery, including colorectal surgery, particularly if they are oncological patients, are at risk of malnutrition with a worse postoperative evolution and an increase in complications. Objectives: to assess the prevalence of malnutrition in patients undergoing colon and rectal surgery in our hospital, and to identify the different risk factors for malnutrition. Methods: a retrospective cohort study including all patients operated on for colorectal cancer in our environment.

[Gastrointestinal hormones in food intake control].

The discovery of gut hormones regulating the energy balance has aroused great interest in the scientific community. Some of these hormones modulate appetite and satiety, acting on the hypothalamus or the solitary tract nucleus in the brainstem. In general, the endocrine signals generated in the gut have direct or indirect (through the autonomous nervous system) anorexigenic effects.

GH responses to GHRH and GHRP-6 in Streptozotocin (STZ)-diabetic rats.

GH responses to GHRH, the physiologic hypothalamic stimulus, and GHRP-6, a synthetic hexapeptide that binds the Ghrelin receptor, were studied in rats treated with streptozotocin (STZ), an experimental model of diabetes. Sprague-Dawley male rats received a single injection either of STZ (70 mg/Kg in 0.01 M SSC, i.