scholarly journals 1,25-Dihydroxyvitamin D3-mediated intestinal calcium transport. Biochemical identification of lysosomes containing calcium and calcium-binding protein (calbindin-D28K).

1986 ◽  
Vol 261 (34) ◽  
pp. 16106-16114
Author(s):  
I Nemere ◽  
V Leathers ◽  
A W Norman
1983 ◽  
Vol 31 (3) ◽  
pp. 426-432 ◽  
Author(s):  
A N Taylor

The vitamin D-induced calcium-binding protein (CaBP) was localized in histological sections of chick duodenum using the peroxidase-antiperoxidase immunocytochemical technique. The time-course of appearance of CaBP in rachitic chicks was investigated from 0 to 120 hr after stimulation by 1,25-dihydroxyvitamin D3 (1,25(OH)2D3). CaBP was not routinely detected at 0 hr after 1,25(OH)2D3 administration. CaBP was first noted in some, but not all, of the samples taken 2 hr following 1,25(OH)2D3 and was detected in all 2 1/2 hr samples. The number of CaBP-containing absorptive cells and the apparent CaBP concentration both increased to a maximum at about 16-24 hr. At later times, as CaBP free cells migrated up the villi, the CaBP-containing cells decreased in number, but even at 120 hr post 1,25(OH)2D3 dose there were significant numbers of CaBP-containing cells present. The relationships between time-course of CaBP location on intestinal villi, enterocyte migration rates, and the time-course of 1,25(OH)2D3 stimulated intestinal calcium transport are discussed.


1983 ◽  
Vol 19 (5) ◽  
pp. 1577-1582 ◽  
Author(s):  
Claude Desplan ◽  
Arlette Brehier ◽  
Christine Perret ◽  
Monique Thomassett

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