Tamoxifen treatment from perinatal day 2 (P2) to P5 efficiently knocked down NRP1 in the mutant compared to littermate control retina at P6.
To determine whether the NRP1 cytoplasmic domain regulates postnatal vascular development, we compared retinal angiogenesis in Nrp1 cytoΔ /Δ and their wild-type littermates on perinatal day (P) 7, when vessels extend from the centre to the periphery, and at P21, when angiogenesis is largely complete in this organ (Fruttiger, 2007).
Perinatal (postnatal day [PND] 7, 14 and 21) and adult (PND 70) rats were more susceptible than pubertal (PND 28 and 42) rats to the lethal effects associated with exposure to tabun, sarin, soman and cyclosarin.
It remains therefore to test whether a neonatal iNO treatment, introduced from birth to the end of the 10-day perinatal exposure to hypoxia, will be able to exert similar protective effects against adverse effects of perinatal hypoxia on the adult pulmonary circulation in our murine experimental model.
Infant weight at 42 days postpartum was measured in hospital during the last day of perinatal care examination while registering for the beginning of the infant care.
*Defined as a composite of either hyaline membrane disease (HMD), necrotizing enterocolitis (NEC), periventricular hemorrhage (PVH), assisted ventilation > 1 day, or perinatal death after 20 weeks gestation and up to 30 days after birth.
*Defined as a composite of either hyaline membrane disease, necrotizing enterocolitis, periventricular hemorrhage, assisted ventilation > 1 day, or perinatal death after 20 weeks gestation and up to 30 days after birth.
The primary study outcome was the composite of either a disease of prematurity (i.e., necrotizing enterocolitis, periventricular hemorrhage and/or hyaline membrane disease), need for assisted ventilation for greater than 1 day, and/or perinatal death after 20 weeks gestation and up to 30 days after birth [ 8, 9].
To evaluate the safety of vitrification of embryos by comparing the perinatal outcome of vitrified day 3 ETs with fresh cleavage-stage ETs.
Outcome measures: The primary outcome of the study was a composite of the diseases of prematurity, need for assisted ventilation for greater than 1 day, or perinatal death.
However, these data were recorded at the end of the perinatal exposure (at postnatal day 5), thus resulting from combined pre- and postnatal insult.
