1 alpha, 25-dihydroxyvitamin D3 receptor ontogenesis in fetal renal development. Am J Physiol 1995 Sep;269(3 Pt 2):F419-28
Date
09/11/1995Pubmed ID
7573491DOI
10.1152/ajprenal.1995.269.3.F419Scopus ID
2-s2.0-0028814815 (requires institutional sign-in at Scopus site) 29 CitationsAbstract
We used immunohistochemical techniques to examine the distribution of 1 alpha, 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 D28k) 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 D28k 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 D28k 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.
Author List
Johnson JA, Grande JP, Roche PC, Sweeney WE Jr, Avner ED, Kumar RAuthor
Ellis D. Avner MD Professor in the Pediatrics department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
AnimalsCalbindin 1
Calbindins
Calcitriol
Embryonic and Fetal Development
Fetus
Immunohistochemistry
Kidney
Mice
Nerve Tissue Proteins
Organ Culture Techniques
Rats
Receptors, Calcitriol
S100 Calcium Binding Protein G