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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of growth hormone on in vitro osteogenesis and gene expression of human osteoblastic cells is donor-age-dependent

Full text
Author(s):
Crippa, Grasiele E. ; Beloti, Marcio M. ; Cardoso, Cristina R. ; Silva, João S. ; Rosa, Adalberto L. [5]
Total Authors: 5
Document type: Journal article
Source: Journal of Cellular Biochemistry; v. 104, n. 2, p. 369-376, May 2008.
Field of knowledge: Health Sciences - Dentistry
Abstract

It has been demonstrated that the effect of GH on bone tissue is reduced with aging. In this study we tested the hypothesis that the action of GH on osteoblastic cells is donor-age-dependent by investigating the effect of GH on the development of osteoblastic phenotype in cultures of cells from adolescents (13-16 years old), young adults (18-35 years old), and adults (36-49 years old). Osteoblastic cells derived from human alveolar bone were cultured with or without GH for periods of up to 21 days, and parameters of in vitro osteogenesis and gene expression of osteoblastic markers were evaluated. GH increased culture growth, collagen content and alkaline phosphatase (ALP) activity in cultures from adolescents and young adults, whereas non-significant effect was observed in cultures from adults. While GH significantly increased the bone-like formation in cultures from adolescents, a slightly effect was observed in cultures from young adults and no alteration was detected in cultures from adults. Results from real-time PCR demonstrated that GH upregulated ALP, osteocalcin, type I collagen, and Cbfa1 mRNA levels in cultures from adolescents. In addition, cultures from young adults showed higher ALP mRNA expression and the expression of all evaluated genes was not affected by GH in cultures from adults. These results indicate that the GH effect on both in vitro osteogenesis and gene expression of osteoblastic markers is donor-age-dependent, being more pronounced on cultures from adolescents. (AU)

FAPESP's process: 03/09767-0 - Ostogenesis on titanium: in vitro evaluation of the effects of different stimulatory methods
Grantee:Adalberto Luiz Rosa
Support Opportunities: Research Projects - Thematic Grants