Endometrial CD16(+) and CD16(-) NK cell count in fertility and unexplained infertility.

Problem: Peripheral counts of CD16(+ ) NK cells have been well characterized in reproductive failure. However, not enough case-control clinical studies have been conducted to establish normal or abnormal CD16(+/-)  values in the endometrium.

Method Of Study: Peripheral and endometrial NK cell counts by FACS, IL-6, and VEGF cytokines levels by ELISA were characterized in fertile women and unexplained infertility patients with implantation failures (UI-IF) during implantation window.

Ovarian stimulation affects the levels of regulatory endometrial NK cells and angiogenic cytokine VEGF.

Problem: Endometrial NK cells play a critical role in uterine vascularization producing angiogenic factors. Impact of ovarian stimulation on endometrial expression of NK cells and VEGF in normal fertile oocyte donors and the effect of endometrial injury treatment on these parameters have been investigated.

Method Of Study: Endometrial tissue was obtained from oocyte donors during natural and stimulated cycles.

Survey of molecular determinants in Gram-positive cocci isolated from hospital settings in Argentina.

Background: In order to study the resistance mechanisms to aminoglycosides, tetracyclines and erythromycin, we investigated the genetic determinants on 85 Streptococcus spp., Staphylococcus spp., and Enterococcus spp.