期刊
JOURNAL OF MOLECULAR MEDICINE-JMM
卷 88, 期 3, 页码 227-233出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00109-009-0567-8
关键词
C/EBP beta; MafB; Osteoporosis; Rapamycin; Cancer; Leukemia
资金
- Berliner Krebsgesellschaft [LEFF200708]
Lytic bone diseases and in particular osteoporosis are common age-related diseases characterized by enhanced bone fragility due to loss of bone density. Increasingly, osteoporosis poses a major global health-care problem due to the growth of the elderly population. Recently, it was found that the gene regulatory transcription factor CCAAT/enhancer binding protein beta (C/EBP beta) is involved in bone metabolism. C/EBP beta occurs as different protein isoforms of variable amino terminal length, and regulation of the C/EBP beta isoform ratio balance was found to represent an important factor in osteoclast differentiation and bone homeostasis. Interestingly, adjustment of the C/EBP beta isoform ratio by the process of translational control is downstream of the mammalian target of rapamycin kinase (mTOR), a sensor of the nutritional status and a target of immunosuppressive and anticancer drugs. The findings imply that modulating the process of translational control of C/EBP beta isoform expression could represent a novel therapeutic approach in osteolytic bone diseases, including cancer and infection-induced bone loss.
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