Effects of bioactive peptides isoleucine-proline-proline (IPP), valine-proline-proline (VPP) and leucine-lysine-proline (LKP) on gene expression of osteoblasts differentiated from human mesenchymal stem cells
In: British journal of nutrition, Jg. 98 (2007), Heft 4, S. 780-788
Online
academicJournal
- print, 47 ref
Zugriff:
Food-derived bioactive peptides are reported to express a variety of functions in vivo. We studied the in vitro effect of three bioactive tripeptides, isoleucine-proline-proline (IPP), valine-proline-proline (VPP) and leucine-lysine-proline (LKP), on osteoblast proliferation and gene expression. We used UMR-106 osteosarcoma cells, human marrow-derived mesenchymal stem cells (hMSC) and osteoblasts differentiated from hMSC. Treatment with 50 μM-IPP increased UMR-106 cell and hMSC proliferation. The gene expression of hMSC-differentiated osteoblasts was analysed by the microarray method. Microarray analysis revealed that IPP up-regulated 270 genes and down-regulated 100 genes. VPP and LKP, by contrast, had a very modest influence on osteoblast gene expression. Real-time PCR confirmed that IPP up-regulated PTHrP, BMP-5 and CREB-5 and down-regulated VDR and caspase-8. IPP possesses potential to increase osteoblast proliferation, differentiation and signalling. Agents that increase the number and function of osteoblasts could improve bone mass and structure, and decrease fracture risk.
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Effects of bioactive peptides isoleucine-proline-proline (IPP), valine-proline-proline (VPP) and leucine-lysine-proline (LKP) on gene expression of osteoblasts differentiated from human mesenchymal stem cells
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Autor/in / Beteiligte Person: | HUTTUNEN, Minna M ; PEKKINEN, Minna ; AHLSTRÖM, Mikael E. B ; LAMBERG-ALLARDT, Christel J. E |
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Zeitschrift: | British journal of nutrition, Jg. 98 (2007), Heft 4, S. 780-788 |
Veröffentlichung: | Wallingford: Cambridge University Press, 2007 |
Medientyp: | academicJournal |
Umfang: | print, 47 ref |
ISSN: | 0007-1145 (print) |
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