Regulation of type I collagen gene expression in bone.
The regulation of COL1A1 gene expression in bone was studied by measuring the activity of type I collagen promoter fusion genes (ColCAT) in permanently transfected osteoblastic cells and calvariae from transgenic animals. The basal activity of ColCAT fusion genes in transfected cells is mediated by DNA sequences between -3.5 to -2.3 kb while expression in vivo requires sequences between -2.3 and -1.7 kb. Parathyroid hormone, 1,25-dihydroxyvitamin D3 and interleukin-1 decrease the activity of ColCAT fusion genes in osteoblastic cells and transgenic calvariae. Because there may be differences between the expression of ColCAT fusion genes in cultured cells and intact bone, it will be important to compare data obtained from transfected cells with an in vivo model such as calvariae from transgenic mice.
Kream
B E
BE
Department of Medicine, The University of Connecticut Health Center, Farmington, Connecticut 06030, USA.
Harrison
J R
JR
Krebsbach
P H
PH
Bogdanovic
Z
Z
Bedalov
A
A
Pavlin
D
D
Woody
C O
CO
Clark
S H
SH
Rowe
D
D
Lichtler
A C
AC
D000818:Animals; D019677:Artificial Gene Fusion / Q000379:methods; D001846:Bone Development / Q000187:drug effects / Q000235:genetics*; D001842:Bone and Bones / Q000187:drug effects / Q000378:metabolism*; D002478:Cells, Cultured; D024042:Collagen Type I / Q000096:biosynthesis* / Q000235:genetics*; D000090602:Collagen Type I, alpha 1 Chain; D018507:Gene Expression Regulation, Developmental / Q000187:drug effects / Q000235:genetics*; D006801:Humans; D007375:Interleukin-1 / Q000494:pharmacology; D051379:Mice; D008822:Mice, Transgenic; D023421:Models, Animal; D010006:Osteoblasts / Q000187:drug effects / Q000378:metabolism; D010281:Parathyroid Hormone / Q000494:pharmacology; D011401:Promoter Regions, Genetic / Q000235:genetics; D051381:Rats; D012886:Skull / Q000187:drug effects / Q000378:metabolism; D014807:Vitamin D / Q000031:analogs & derivatives* / Q000494:pharmacology
D024042:Collagen Type I; D000090602:Collagen Type I, alpha 1 Chain; D007375:Interleukin-1; D010281:Parathyroid Hormone; D014807:Vitamin D; C097949:1,25-dihydroxyvitamin D