Abstract
Glucocorticoids are pleiotropic regulators of multiple cell types with critical roles in physiological systems that change across the life-course. Although glucocorticoids have been associated with aging, available data on the aging trajectory in basal circulating glucocorticoids are conflicting. A literature search reveals sparse life-course data. We evaluated (1) the profile of basal circulating corticosterone across the life-course from weaning (postnatal day—PND 21), young adult PND 110, adult PND 450, mature adult PND 650 to aged phase PND 850 in a well-characterized homogeneous rat colony to determine existence of significant changes in trajectory in the second half of life; (2) sex differences; and (3) whether developmental programming of offspring by exposure to maternal obesity during development alters the later-life circulating corticosterone trajectory. We identified (1) a fall in corticosterone between PND 450 and 650 in both males and females (p < 0.05) and (2) higher female than male concentrations (p < 0.05). (3) Using our five life-course time-point data set, corticosterone fell at a similar age but from higher levels in male and female offspring of obese mothers. In all four groups studied, there was a second half of life fall in corticosterone. Higher corticosterone levels in offspring of obese mothers may play a role in their shorter life-span, but the age-associated fall occurs at a similar time to control offspring. Although even more life-course time-points would be useful, a five life-course time-point analysis provides important new information on normative and programmed aging of circulating corticosterone.
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Abbreviations
- BMI:
-
Body mass index
- C:
-
Control
- dG:
-
Days gestation
- PND:
-
Postnatal day
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Acknowledgments
LARC is a graduate student from Doctorado en Ciencias Biomédicas, Facultad de Medicina, Universidad Nacional Autónoma de México and is a recipient of the CONACyT fellowship; this work was supported by CONACyT 155166 México. We are grateful to Guadalupe L. Rodríguez-González for assistance with the manuscript.
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The authors have nothing to disclose and have no conflict of interest.
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Zambrano, E., Reyes-Castro, L.A. & Nathanielsz, P.W. Aging, glucocorticoids and developmental programming. AGE 37, 52 (2015). https://doi.org/10.1007/s11357-015-9774-0
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DOI: https://doi.org/10.1007/s11357-015-9774-0