Comparison of the effects of vitamin D metabolites on collagen synthesis and resportion of fetal rat bone in organ culture

1980 ◽  
Vol 32 (1) ◽  
pp. 135-138 ◽  
Author(s):  
Lawrence G. Raisz ◽  
Barbara E. Kream ◽  
Mark D. Smith ◽  
Hollis A. Simmons

1982 ◽  
Vol 34 (1) ◽  
pp. 370-375 ◽  
Author(s):  
Barbara E. Kream ◽  
Lawrence G. Raisz ◽  
Ann L. Sandberg




Bone ◽  
1990 ◽  
Vol 11 (1) ◽  
pp. 47-51 ◽  
Author(s):  
M.M. Hurley ◽  
D.L. Martin ◽  
B.E. Kream ◽  
L.G. Raisz


Endocrinology ◽  
1979 ◽  
Vol 104 (3) ◽  
pp. 715-721 ◽  
Author(s):  
JOHN W. DIETRICH ◽  
ERNESTO M. CANALIS ◽  
DONNA M. MAINA ◽  
LAWRENCE G. RAISZ


Endocrinology ◽  
1980 ◽  
Vol 107 (5) ◽  
pp. 1593-1599 ◽  
Author(s):  
ROBERT MARCURS ◽  
FRANCINE B. ORNER ◽  
ARNOLD S. BRICKMAN


1985 ◽  
Vol 105 (1) ◽  
pp. 79-85 ◽  
Author(s):  
I. R. Dickson ◽  
P. M. Maher

ABSTRACT When growth cartilage from rachitic chicks was cultured in the presence of the calcium-regulating hormone 1,25-dihydroxyvitamin D3 (1,25-(OH)2D3), collagen resorption was increased and collagen synthesis decreased compared to control cultures containing no hormone. The minimum concentration of the hormone that caused a statistically significant inhibition of collagen synthesis was 10 −8 mol/l. Collagen synthesis by growth cartilage from normal chicks was also reduced by 1,25-(OH)2D3, showing that it was not an abnormal response of vitamin D-depleted tissue. 25-Hydroxyvitamin D3 and 24,25-dihydroxyvitamin D3 also inhibited collagen synthesis by cultures of growth cartilage but only at higher metabolite concentrations. 1,25-Dihydroxyvitamin D3 (10−7 mol/l) did not significantly inhibit collagen synthesis by cultures of articular fibrocartilage and of sternal cartilage, tissues that do not calcify physiologically. The minimum concentration of 1,25-(OH)2D3 (10−9 mol/l) necessary to cause decreased collagen synthesis by embryonic chick calvaria was lower than the value obtained with growth cartilage; this suggests that bone cells may be more sensitive to the hormone in this respect than are growth cartilage chondrocytes. These findings provide evidence of a direct role of 1,25-(OH)2D3 in the control of endochondral bone formation which is consistent with its primary role in the maintenance of plasma calcium homeostasis. J. Endocr. (1985) 105, 79–85



Endocrinology ◽  
1987 ◽  
Vol 120 (6) ◽  
pp. 2494-2499 ◽  
Author(s):  
DONNA D. SMITH ◽  
MAXINE GOWEN ◽  
GREGORY R. MUNDY






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