Age-dependent increases in adrenal cytochrome b5 and serum 5-androstenediol-3-sulfate

Juilee Rege, Shigehiro Karashima, Antonio M. Lerario, Joshua M. Smith, Richard J. Auchus, Josephine Z. Kasa-Vubu, Hironobu Sasano, Yasuhiro Nakamura, Perrin C. White, William E. Rainey

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Context: Adrenal production of dehydroepiandrosterone sulfate (DHEA-S) increases throughout childhood owing to expansion of the zona reticularis (ZR). ZR features cells with a steroidogenic phenotype distinct from that of the adjacent zona fasciculata, with higher expression of cytochrome b5 type A (CYB5A) and steroid sulfotransferase type 2A1 but decreased 3α-hydroxysteroid dehydrogenase type 2 (HSD3B2). In addition to DHEA-S, three adrenal Δ5-steroid sulfates could provide additional tools to define adrenal maturation. Objective: This study sought to simultaneously measure serum levels of four adrenal Δ5-steroid sulfates, pregnenolone sulfate (Preg-S), 17α-hydroxypregnenolone sulfate (17OHPreg-S), DHEA-S, and 5-androstenediol-3-sulfate (Adiol-S) as a function of age and relate their production to the age-dependent adrenal localization of CYB5A. Participants and Methods: Δ5-steroid sulfates were quantified by liquid chromatography-tandem mass spectrometry in sera from 247 normal children (129 males,118 females) age 1.5-18 y and 42 adults (20 males, 22 females). Immunofluorescence localized HSD3B2 andCYB5Ain normal adrenal glands from subjects age 2-35 y. Finally, HAC15 adrenocortical cells were transduced with lentiviral short hairpin RNA to suppress CYB5A expression. Results: Of the Δ5-steroid sulfates quantified, DHEA-S was most abundant. Adiol-S increased in parallel with DHEA-S. Steroid ratios (17OHPreg-S/DHEA-S) suggested increases in 17,20-lyase activity during childhood. Immunofluorescence analysis showed age-related increases in ZR CYB5A immunoreactivity. Furthermore, silencing CYB5A in HAC15 adrenocortical cells significantly reduced DHEA-S and Adiol-S production. Conclusion: Adiol-S shows a similar age-related increase to that of DHEA-S. This likely results from the childhood expansion of CYB5A-expressing ZR, which enhances 17,20-lyase activity and the production of DHEA-S and Adiol-S.

Original languageEnglish (US)
Pages (from-to)4585-4593
Number of pages9
JournalJournal of Clinical Endocrinology and Metabolism
Volume101
Issue number12
DOIs
StatePublished - Dec 2016

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Biochemistry
  • Endocrinology
  • Clinical Biochemistry
  • Biochemistry, medical

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    Rege, J., Karashima, S., Lerario, A. M., Smith, J. M., Auchus, R. J., Kasa-Vubu, J. Z., Sasano, H., Nakamura, Y., White, P. C., & Rainey, W. E. (2016). Age-dependent increases in adrenal cytochrome b5 and serum 5-androstenediol-3-sulfate. Journal of Clinical Endocrinology and Metabolism, 101(12), 4585-4593. https://doi.org/10.1210/jc.2016-2864