Kai Chen1, Jianli Bi2, Yixin Su2, Mark C Chappell3, James C Rose4. 1. Department of Obstetrics and Gynecology, Wake Forest School of Medicine, Winston-Salem, NC, USA. 2. Department of Obstetrics and Gynecology, Wake Forest School of Medicine, Winston-Salem, NC, USA Center of Research for Obstetrics and Gynecology, Wake Forest School of Medicine, Winston-Salem, NC, USA. 3. Hypertension and Vascular Research Center, Wake Forest School of Medicine, Winston-Salem, NC, USA. 4. Department of Obstetrics and Gynecology, Wake Forest School of Medicine, Winston-Salem, NC, USA Center of Research for Obstetrics and Gynecology, Wake Forest School of Medicine, Winston-Salem, NC, USA jimrose@wfubmc.edu.
Abstract
OBJECTIVE: Angiotensin-converting enzyme (ACE) and angiotensin-converting enzyme 2 (ACE2) are key enzymes of the renin-angiotensin system. We investigated developmental changes in renal ACE and ACE2 gene expression and activity in both male and female sheep. METHODS: Three groups of sheep (fetus, newborn, and adult) were used. Renal ACE and ACE2 activities, messenger RNA (mRNA), and protein expression were studied. RESULTS: Renal ACE and ACE2 activities increased at 1 year in males, while there were no changes throughout development in females. Renal ACE and ACE2 mRNA and protein showed no sex differences but increased by 1 year of age. CONCLUSION: There are sex-related differences in the development of renal-converting enzyme activities that may have functional implications in terms of the regulation of blood pressure and renal function in men and women. The difference in the patterns of gene expression and enzyme activity indicates that changes in gene expression may not accurately reflect changes in activity.
OBJECTIVE:Angiotensin-converting enzyme (ACE) and angiotensin-converting enzyme 2 (ACE2) are key enzymes of the renin-angiotensin system. We investigated developmental changes in renal ACE and ACE2 gene expression and activity in both male and female sheep. METHODS: Three groups of sheep (fetus, newborn, and adult) were used. Renal ACE and ACE2 activities, messenger RNA (mRNA), and protein expression were studied. RESULTS: Renal ACE and ACE2 activities increased at 1 year in males, while there were no changes throughout development in females. Renal ACE and ACE2 mRNA and protein showed no sex differences but increased by 1 year of age. CONCLUSION: There are sex-related differences in the development of renal-converting enzyme activities that may have functional implications in terms of the regulation of blood pressure and renal function in men and women. The difference in the patterns of gene expression and enzyme activity indicates that changes in gene expression may not accurately reflect changes in activity.
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