Ashley L. Gehrand

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The long-term effects of neonatal intermittent hypoxia (IH), an accepted model of apnea-induced hypoxia, are unclear. We have previously shown lasting "programming" effects on the HPA axis in adult rats exposed to neonatal IH. We hypothesized that neonatal rat exposure to IH will subsequently result in a heightened inflammatory state in the adult. Rat pups(More)
A coordinated hypothalamic-pituitary-adrenal axis response is important for the survival of newborns during stress. We have previously shown that prior to postnatal day (PD) 5, neonatal rats exposed to hypoxia (one of the most common stressors effecting premature neonates) exhibit a large corticosterone response with a minimal increase in immunoassayable(More)
Acute neonatal hypoxia, a common stressor, causes a spontaneous decrease in body temperature which may be protective. There is consensus that hypothermia should be prevented during acute hypoxia in the human neonate; however, this may be an additional stress with negative consequences. We hypothesize that maintaining body temperature during hypoxia in the(More)
Stress-induced increases in neonatal corticosterone demonstrate a unique shift from ACTH independence to ACTH dependence between postnatal day 2 (PD2) and day 8 (PD8) in newborn rats. This shift could be due to the binding of a bioactive, non--immunoreactive plasma ligand to the adrenocortical melanocortin 2 receptor (MC2R) (ACTH receptor). A potent MC2R(More)
1 2 Adrenocortical Sensitivity to ACTH in Neonatal Rats: 3 4 Correlation of Corticosterone Responses and Adrenal cAMP Content 5 6 7 8 9 Jonathan Bodager, Thomas Gessert, Eric D. Bruder, Ashley Gehrand and Hershel Raff 10 11 12 13 Endocrine Research Laboratory; Aurora St. Luke's Medical Center, Aurora Research Institute, 14 Milwaukee, WI 53215 15 16 and 17(More)
BACKGROUND Reduced plasma survival of VWF is characteristic of patients with type 1C VWD. These subjects can be identified by an increased steady-state ratio of plasma VWFpp to VWF:Ag. A similar phenotype occurs in mice with the Mvwf1 allele. OBJECTIVES To 1) determine if VWFpp/VWF:Ag ratio can be used to identify a "type 1C" phenotype in mice, 2)(More)
The classic renin-angiotensin system is partly responsible for controlling aldosterone secretion from the adrenal cortex via the peptide angiotensin II (ANG II). In addition, there is a local adrenocortical renin-angiotensin system that may be involved in the control of aldosterone synthesis in the zona glomerulosa (ZG). To characterize the long-term(More)
Care of premature infants often requires parental and caregiver separation particularly during hypoxic and hypothermic episodes. We have established a neonatal rat model of human prematurity involving maternal-neonatal separation and hypoxia with spontaneous hypothermia prevented with external heat. Adults previously exposed to these neonatal stressors show(More)
The maintenance of B-cell anergy is essential to prevent the production of autoantibodies and autoimmunity. However, B-cell extrinsic mechanisms that regulate B-cell anergy remain poorly understood. We previously demonstrated that regulatory T (Treg) cells are necessary for the maintenance of B-cell anergy. We now show that in Treg-cell-deficient mice,(More)
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