---

Background and Objective: Antidiuretic hormone (ADH) is released from pituitary gland in response to stimulation of plasma osmolalrity. ADH affects on the kidney and regulates the water and electrolytes. This study was done to evaluate the effect of hydro-alcoholic extract of red grape seed on antidiuretic hormone secretion in male rats. Methods: In this experimental study, 30 adult male Wister rats were allocated into 5 groups. Animals in control group were received 1 mL of water, orally. Animals in positive control group were received 12mg/kg/bw of Furosemide, intraperitonally. In experimental groups, one hour after injection of 12mg/kg/bw of Furosemide, animals were received the red grape seed hydro-alcoholic extract, orally, in doses of 100, 200 and 400 mg/kg/bw for 4 days, respectively. Serum level of ADH was measeared using ELISA method. Results: Serum level of ADH in groups of 100, 200 and 400 mg/kg/bw doses of grape seed extract were (21±2.5, 19±1.24 and 14±2 pmol/L, respectively) which was significantly less than control group (40.5±3 pmol/L) (P<0.05). Conclusion: The oral consumption of hydro-alcoholoc extract of red grape seed reduces the antidiuretic hormone secretion in male rats.

---

Background and Objective: Helicobacter pylori infection is a pathogenic agent of many stomach disorders, including peptic ulcer disease, stomach cancer and stomach lymphoma. The reasons for the variety of the outcomes of the infection resulting from Helicobacter pylori may be related to difference in genotype or expression of pathogenic bacterial-related factors, as well as environmental and host factors. This study was conducted to determine the frequency of s1, s2, m1 and m2 alleles of the vacA Helicobacter pylori gene isolated from clinical samples.
Methods: This descriptive-analytic study was conducted on 183 patients whom suffering from digestive disorders which referring to the endoscopic department of Kordkuy’s Amiralmomenin hospital in Golestan province, north of Iran during 2016. Two samples of biopsy from antrum region were taken from each patient. The first sample was evaluated by urease test and the second one was done with saline buffer phosphate solution. Urease test of 50 positive samples and DNA extraction was performed. The polymerase chain reaction was performed for vacA alleles and then the relationship between toxin secretion with the symptoms such as abdominal pain, stomachache, reflux, nausea, gastritis, bleeding, stomach ulcers, burning, anemia, and weight loss were evaluated.
Results: Frequency of s1, s2, m1, m2 vacA alleles of isolated strains was 88%, 6%, 38% and 70%, respectively. Also, the s1 / m1, s1 / m2, s2 / m1 and s2 / m2 genotypes of vacA Helicobacter pylori gene were determined 36%, 58%, 0% and 6%, respectively. Toxin secretion did not have significant relationship with digestive symptoms.
Conclusion: The dominant genotype of the patients with digestive disorders (58%) in this study was s1 / m2 and s2 / m1 genotype did not observe in clinical samples.