Material and methods: The methanolic extract of PS was prepared in the dose of 500 mg/kg. Twenty-eight male Wistar rats were assigned to 4 equal sized groups: two control groups and two treated groups which were supplemented with either PS or OMZ orally at a dose of 500 mg/kg and 20 mg/kg body weight respectively. After 28 days of treatment, one control group, the PS and OMZ group were subjected to a single exposure of water-immersion restraint stress for 3.5 h. After the last exposure to stress, the stomach was excised for evaluation of the parameters.
Results: Oral supplementation of PS was as effective in preventing the formation of gastric lesion when compared with OMZ (p < 0.05). The increased gastric acidity and MDA due to stress was also reduced with supplementation of PS and OMZ. Only PS had the ability to reduce prostaglandin E2 loss (p = 0.0067) and have the ability to down regulate cyclooxygenase-2 (COX-2) mRNA expression (p = 0.01) with stress exposure.
Conclusions: Piper sarmentosum possesses a similar protective effect against stress-induced gastric lesions as omeprazole. The protective effect was associated with decreased lipid peroxidation, increased prostaglandin E2, reduction in gastric acidity and reduction in COX-2 mRNA expression which was altered by stress.
METHODS: The quasi-experimental study with single-blinded parallel groups will comprise subjects from two civil departments. The intervention group will be required to conduct 2 days of fasting and 5 days of ad libitum diet in a week, while the control group will follow the usual healthy lifestyle. The largest sample size will be taken to achieve a power of 80% and an alpha value of 5%. Based on the 30% attrition rate, the total sample size needed in the study will be 140 participants, with 70 in each of the two arms. This study will use SPSS 24 for statistical analysis.
DISCUSSION: The study describes a unique protocol of intermittent fasting mimicking the Muslim Sunnah of fasting among people with elevated blood pressure. The findings will contribute to decrease blood pressure among those with elevated blood pressure. If proven to be effective, the intermittent fasting method would be useful for developing an effective programme to prevent elevated blood pressure among adults. The protocol will contribute to efforts to find whether or not intermittent fasting can improve elevated blood pressure as well as body weight, body mass index, waist circumference and nutrition status among adults.
CLINICAL TRIAL NUMBER: The study was registered with clinicaltrials.gov (NCT04953650).
Methods: A total of 34 female Sprague Dawley rats, aged 18 days old, weighing 40 to 45 g, were randomly divided into negative control, positive control, and treatment groups. A daily dose of 1500 mg/kg per body weight of FSA extract was administrated orally to rats in the treatment group for 13 days. On day eight of the study, OHSS was induced in both positive control and treated groups by subcutaneous injection of pregnant mare's serum gonadotropin 50 IU for four consecutive days, followed by human chorionic gonadotropin 25 IU on the fifth day. The effect of FSA extract was evaluated by measuring the concentration of serum E2 using the enzyme-linked immunosorbent assay.
Results: FSA extract reduced serum E2 level significantly in the treated OHSS model (p-value < 0.050) compared to the positive control group.
Conclusions: The finding has important implications on the development of female infertility adjuvant drugs for safe assisted reproduction technology cycles in terms of OHSS prevention.