Rosen Clifford J, Ackert-Bicknell Cheryl, Rodriguez Juan Pablo, Pino Ana Maria
Maine Medical Center Research Institute, Scarborough, ME 04041, USA.
Crit Rev Eukaryot Gene Expr. 2009;19(2):109-24. doi: 10.1615/critreveukargeneexpr.v19.i2.20.
Bone marrow adipogenesis is a normal physiologic process in all mammals. However, its function is unknown. The mesenchymal stem cell is the marrow precursor for adipocytes as well as osteoblasts, and PPARG is an essential differentiation factor for entrance into the fat lineage. Mouse models have provided significant insight into the molecular cues that define stromal cell fate. In humans, accelerated marrow adipogenesis has been associated with aging and several chronic conditions, including diabetes mellitus and osteoporosis. Newer imaging techniques have been used to determine the developmental time course of fat generation in bone marrow. However, more studies are needed to understand the interrelationship among hematopoietic, osteoblastic, and adipogenic cells within the marrow niche.
骨髓脂肪生成是所有哺乳动物的正常生理过程。然而,其功能尚不清楚。间充质干细胞是脂肪细胞和成骨细胞的骨髓前体,而PPARG是进入脂肪谱系的关键分化因子。小鼠模型为确定基质细胞命运的分子线索提供了重要见解。在人类中,骨髓脂肪生成加速与衰老和几种慢性疾病有关,包括糖尿病和骨质疏松症。更新的成像技术已被用于确定骨髓中脂肪生成的发育时间进程。然而,需要更多的研究来了解骨髓微环境中造血细胞、成骨细胞和脂肪生成细胞之间的相互关系。