1α,25-Dihydroxyvitamin D3 receptor ontogenesis in fetal renal development

J. A. Johnson, J. P. Grande, P. C. Roche, W. E. Sweeney, E. D. Avner, R. Kumar

Research output: Contribution to journalArticle

24 Scopus citations

Abstract

We used immunohistochemical techniques to examine the distribution of 1α,25-dihydroxyvitamin D3 receptors (VDR) in developing rat and mouse kidneys and murine metanephric organ culture. In vivo, the patterns of expression in the two species were similar despite the slight difference in gestational periods (rat, 22 days; mouse, 19 days). Starting at gestational day 15, epitopes for VDR were found in cells of branching ureteral buds and in surrounding mesenchyme and at later developmental stages in glomerular visceral and parietal epithelial cells and proximal and distal tubules (DT). Epitopes for the 28-kDa calcium-binding protein (calbindin D(28k)) were found exclusively in DTs starting at gestational day 19. The pattern of VDR expression during in vitro nephrogenesis in serum-free murine metanephric organ culture paralleled that seen in vivo. At the time of explantation into organ culture (gestational day 13), VDR epitopes were not detected. By 3 days of in vitro development, VDR expression was identical to that found in gestational day 15 metanephroi in vivo. VDR expression after 5 days of in vitro development mirrored the pattern of gestational day 17 metanephroi in vivo. No calbindin D(28k) epitopes were seen at any in vitro developmental stage studied. We demonstrate for the first time that VDR are present in specific areas of the developing rat and mouse kidney early in gestation. Calbindin D(28k) appears later in developing rat and mouse kidney and is distributed differently than the VDR. Metanephric organ culture may be a useful model for studying the regulation and function of VDR during early renal development.

Original languageEnglish (US)
Pages (from-to)F419-F428
JournalAmerican Journal of Physiology - Renal Fluid and Electrolyte Physiology
Volume269
Issue number3 38-3
StatePublished - Jan 1 1995

Keywords

  • calbindin D(28k)
  • fetal development
  • kidney
  • metanephric organ culture
  • mouse
  • rat
  • vitamin D receptor

ASJC Scopus subject areas

  • Physiology

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