Summary The effect of nifedipine 40 mg·day–1 for 3 months on glucose tolerance, insulin and C-peptide secretion after an oral glucose tolerance test (OGTT), intra-venous glucose tolerance test (IVGTT) and glucagon stimulatory test, has been studied in 8 moderately hypertensive women suffering from non-insulin dependent diabetes mellitus (NIDDM).No significant variation in glucose metabolism was noted after nifedipine treatment, except for a slight improvement in insulin secretion after OGTT at the end of the study. There was an increase in cholesterol as a collateral effect. 相似文献
Due to the shortage of human organs, xenotransplantation is being explored as an alternative to allotransplantation, but immune rejection remains a major hurdle to its implementation. We tested the ability of human CD4+CD25+ T cells (Treg cells) to suppress CD4+ T cell-mediated anti-porcine xenoresponses usingin vitroassays. Human Treg cells were hyporesponsive to porcine cell stimulation and suppressed the proliferative response of CD4+CD25- T cells in a dose-dependent manner, and comparison of the allo- and xenoresponses indicated that more Treg cells might be required to suppress the xenogeneic response than the allogeneic response. Stimulation of CD4+CD25- T cells with porcine cells resulted in secretion of IFN-gamma, TNF-alpha, IL-10, IL-6 and IL-2, and Treg cells suppressed the secretion of these cytokines, as well as the CD4+CD25- T-cell cytolytic response against porcine cells. These results suggest a potential role for Treg cells in promoting xenograft survival. 相似文献
Many new insights have been gained over the past 5 years into the mechanisms that regulate immune reactivity to cell and organ transplants. This new knowledge is being applied to the development of innovative experimental strategies that may soon be evaluated in the clinic. 相似文献
This open multicenter study was performed in 20 hospital gynecological units in the UK. The effects of 600 mg oral mifepristone as pretreatment to vaginal prostaglandin induction of second second trimester abortion was studied in 267 women.
The primary efficacy variable was the abortion induction interval, defined as the time taken to expel the fetus from the time of administration of the first prostaglandin pessary. Induction was commenced 36 to 48 hours following mifepristone intake.
The mean abortion induction interval was 7 h. A total of 81.9% of women aborted within 12 h. There was a significant relationship between abortion induction interval and age of gestation, and a significant inverse relationship between abortion induction interval and parity.
Vomiting, pelvic pain, and nausea were the most frequently reported adverse events. Two patients required transfusion and one patient with a uterine scar from a previous cesarean section suffered a ruptured uterus and hysterotomy. 相似文献
Objective:
We examined the relationship between tolerance development, counterregulatory responses and arterial vasodilating effects
evaluated by digital pulse plethysmography.
Methods:
Twenty patients with stable angina pectoris were exercise tested before, after 2 and after 24 h of open nitrate patch treatment.
Results:
The effects observed after 2 h of treatment on exercise duration, ST-segment depression, blood pressure and heart rate were
lost in most individuals after 24 h. In contrast, the effects on the arterial pulse curves persisted after 24 h, with a mean
change from baseline of 29%, compared to 33% at 2 h. After 24 h, a significant decrease in haematocrit and an increase in
body weight were observed. The haematocrit changes correlated with the loss of clinical efficacy (r =0.57 for ST-segment depression, and r =0.54 for exercise duration).
Conclusion:
Clinical nitrate tolerance may be observed despite maintenance of the arterial vasodilating effects, and tolerance is more
related to plasma volume expansion as a counterregulatory mechanism.
Received: 28 February 1996/Accepted in revised form: 5 July 1996 相似文献