Long-term (10-week) treatment of Fischer 344 (F344) rats with the synthetic estrogen diethylstilbestrol (DES) increases the level of vascular endothelial growth factor (VEGF) in the pituitary. This is concurrent with the development of a large tumor of the pituitary of F344 rats. A role for VEGF in estrogendependent pituitary tumor growth is also supported by the fact that pituitary VEGF level is not increased by estrogen treatment in rats of the tumor-resistant Brown Norway (BN) strain. However, VEGF is not increased by estrogen treatment in an F1 hybrid of F344 and BN, even though F1 hybrid rats do form pituitary tumors in response to estrogen. Quantitative trait locus (QLT) mapping reveals that control of estrogen-dependent VEGF expression is linked to the Edpm5 QTL, which was previously identified as a QTL for estrogen-dependent pituitary tumor growth. In contrast, the QTL Edpm2-1 and Edpm9-2, which have been shown to each have a significant effect on estrogendependent pituitary mass of a magnitude similar to Edpm5, do not have any effect on VEGF level. Taken together, our results support the association of VEGF expression with growth of the estrogen-Induced rat pituitary tumor, as has been reported by others, but they also indicate that there is significant pathways of growth regulation that are independent of high-level VEGF expression.
Background: The practice of caesarean section is increasing day by day. Delivery by caesarean section can cause more complications than normal vaginal delivery and one of the most common complications is primary or secondary postpartum hemorrhage. The aim of present study was to study the efficacy and safety of tranexamic acid in reducing blood loss during and after caesarean section. Methods: This study was conducted at Deccan College of Medical Sciences, Hyderabad. It was a prospective randomized double blind placebo controlled study. This study includes 60 pregnant women divided in to two groups. Just before the induction of anesthesia 1 gm of tranexamic acid in 20 ml of normal saline was given over 10 minutes in test group and 20 ml of normal saline was infused in control group. Results: The demographic characters of patients in two groups were comparable. There was no statistically significant difference in the heart rates, respiratory rates and blood pressures in the two groups. There was statistically significant difference in the quantity of the blood loss from during the operation and 2 hours postpartum (p=0.003). Total mean blood loss in control group was 718.80±233.1 ml and in study group was 554.28±207.8 ml. The drop in hemoglobin after caesarean section in study group was not significant where as in control group was significant. There was no significant difference in the prothrombin time and partial thromboplastin time in the groups, pre and post operatively. In this study the use of tranexamic acid reduced the dose of other uterotonics like syntocin in study group. Conclusions: Tranexamic acid significantly reduced the amount of blood loss during the caesarean section and also reduced the use of other uterotonics. Thus, tranexamic acid can be used safely and effectively in subjects undergoing caesarean section.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.