Overexpression of microRNA-122 enhances in vitro hepatic differentiation of fetal liver-derived stem/progenitor cells.

MicroRNAs (miRNAs) are a versatile class of tiny non-coding RNAs involved in regulation of various biological processes. miRNA-122 (miR-122) is specifically and abundantly expressed in human liver. However, the role of miR-122 in differentiation of fetal liver stem/progenitor cells into hepatocytes remains unclear. In this study, dual positive CD34+/CD117+ expressing human fetal liver stem/progenitor cells was enriched by magnetic cell sorting and cultured in vitro. The level of miR-122 was found to be increased at specific time intervals. Interestingly, during the differentiation process of hepatocyte-like cells, the increase in expression of miR-122 was positively correlated with expression of hepatocyte-specific genes. The status of differentiation process was improved by transfection of miR-122 into enriched stem/progenitor cells. The expression level of hepatic-specific genes as well as liver-enriched transcription factors (LETFs) was significantly increased by overexpression of miR-122 in fetal liver stem/progenitor cells. Thus, the study delineated the role of hepato-specific miR-122 in differentiation of fetal liver stem/progenitor cells into hepatocyte-like cells which could be used as a therapeutic target molecule to generate abundant hepatocytes.

Descriptive study of blood transfusion practices in women undergoing cesarean delivery.

AIM: To study the blood transfusion practices in women undergoing cesarean delivery at a tertiary care centre in northern India. METHODS: This was a prospective study conducted in 1769 women who underwent cesarean section at a tertiary centre hospital from May 2008 to November 2009. A comprehensive predesigned proforma was filled in for each woman. Data related to antenatal, intrapartum and postnatal events was recorded and compared between women receiving blood transfusion during cesarean section and women not receiving blood transfusion. RESULTS: The cesarean section rate was 26% and the blood transfusion rate was 12.21%. The overall crossmatch transfusion ratio in our study was 5.46:1. After multiple regression logistic analysis factors, like placenta previa (OR 15.19, 95% CI 9.28-24.82), anemia (OR 9.93, 95% CI 5.17-19.06), blood loss >1000 mL (OR 5.97, 95% CI 4.32-8.24), abruptio (OR 4.18, 95% CI 2.02-8.62), intraoperative complications, like uterine incision extension, uterine atony, hysterectomy (OR 2.69, 95% CI 1.70-4.24), general anesthesia (2.48, 95% CI 1.70-3.61) and inadequate antenatal supervision (OR 1.59, 95% CI 1.05-2.42) were found to be significantly associated with a higher risk for blood transfusion during cesarean section. CONCLUSION: Routine crossmatching of blood for all women prior to cesarean section needs to be reviewed. Cesarean sections performed on women with high risk factors for blood transfusion can have sudden and significant blood loss and thus adequate blood arrangement prior to cesarean section is justified only in this group of women and not in all women.

An alternate surgical approach to reduce hemorrhage and complications during cesarean hysterectomy for adherent placenta.

BACKGROUND: Cesarean hysterectomy for adherent placenta is associated with increased maternal morbidity due to massive hemorrhage requiring large volume blood transfusion, bladder or ureteric injury, intensive care unit (ICU) admission and prolonged hospital stay. There is an ongoing effort to improve the outcome of these women and measures to reduce blood loss. OBJECTIVE: The purpose of the present study was to develop an alternate surgical approach for performing a Cesarean hysterectomy in women with adherent placenta in order to reduce hemorrhage and urinary tract injuries, and thereby improve the maternal outcome. STUDY DESIGN: A prospective observational study in a tertiary care hospital in North India. The surgical approach described in the present study was practiced in 12 women who underwent Cesarean hysterectomy for adherent placenta previa. In this approach, dissection of the bladder flap as close as to the cervix was made prior uterine incision and delivery of the baby. During dissection of the bladder flap, the blood vessels traversing between uterus and bladder were ligated and divided. RESULT: These 12 women underwent Cesarean hysterectomy under general anesthesia. The interval from induction of anesthesia to delivery of the baby ranged from 40 to 79 min, and none of the babies had birth asphyxia. No woman had bladder or ureteric injury. All women had histopathological proven adherent placenta, 5 had placenta percreta, one had placenta increta and 6 had placenta accreta. The average blood loss was 1.46 l and the mean number of blood transfusions was 2.1 units. None of the women required post-operative ventilatory support or ICU admission, and all women were discharged from hospital between 4 to 7 days following Cesarean hysterectomy CONCLUSION: The present series describes an alternate surgical approach for Cesarean hysterectomy in adherent placenta. Dissection of the bladder flap prior to delivery of the baby followed by hysterectomy reduced the hemorrhage and there was no bladder or ureteric injury. This surgical approach requires no additional resources and may easily be followed in a low-resource setting.