Synergistic effects of 1,25-Dihydroxyvitamin D3 and TGF-beta1 on the production of insulin-like growth factor binding protein 3 in human bone marrow stromal cell cultures.

TY - JOUR

T1 - Synergistic effects of 1,25-Dihydroxyvitamin D3 and TGF-beta1 on the production of insulin-like growth factor binding protein 3 in human bone marrow stromal cell cultures.

AU - Kveiborg, M

AU - Flyvbjerg, A

AU - Kassem, M

N1 - Keywords: Adult; Blotting, Western; Bone Marrow Cells; Calcitriol; DNA, Complementary; Drug Synergism; Humans; Insulin-Like Growth Factor Binding Protein 3; Insulin-Like Growth Factor I; Insulin-Like Growth Factor II; RNA; Reverse Transcriptase Polymerase Chain Reaction; Stromal Cells; Transforming Growth Factor beta

PY - 2002

Y1 - 2002

N2 - 1,25-Dihydroxyvitamin D3 (calcitriol), transforming growth factor-beta (TGF-beta), and insulin-like growth factors (IGFs) are all important bone regulatory factors known to affect proliferation and differentiation of human bone-forming cells (osteoblasts). We have previously shown that TGF-beta1 increased IGF-I and IGF-binding protein (IGFBP)-3 production in human bone marrow stromal (hMS) osteoblast progenitors and calcitriol stimulated IGFBP-3 and IGFBP-4 production. As interaction between signaling pathways of these factors has been reported, the present study aimed at examining the concerted actions on components of the IGF-system. We report that co-treatment with TGF-beta1 and calcitriol resulted in a synergistic increase in IGFBP-3 production, thereby suggesting that the effects of these factors on hMS osteoblast differentiation may involve the observed increase in IGFBP-3.

AB - 1,25-Dihydroxyvitamin D3 (calcitriol), transforming growth factor-beta (TGF-beta), and insulin-like growth factors (IGFs) are all important bone regulatory factors known to affect proliferation and differentiation of human bone-forming cells (osteoblasts). We have previously shown that TGF-beta1 increased IGF-I and IGF-binding protein (IGFBP)-3 production in human bone marrow stromal (hMS) osteoblast progenitors and calcitriol stimulated IGFBP-3 and IGFBP-4 production. As interaction between signaling pathways of these factors has been reported, the present study aimed at examining the concerted actions on components of the IGF-system. We report that co-treatment with TGF-beta1 and calcitriol resulted in a synergistic increase in IGFBP-3 production, thereby suggesting that the effects of these factors on hMS osteoblast differentiation may involve the observed increase in IGFBP-3.

M3 - Journal article

C2 - 12076259

SN - 0903-4641

VL - 110

SP - 410

EP - 414

JO - Acta Pathologica Microbiologica et Immunologica Scandinavica

JF - Acta Pathologica Microbiologica et Immunologica Scandinavica

IS - 5

ER -