...
首页> 外文期刊>Journal of Cellular Physiology >Transgenic Expression of Osteoactivin/gpnmb Enhances Bone Formation In Vivo and Osteoprogenitor Differentiation Ex Vivo
【24h】

Transgenic Expression of Osteoactivin/gpnmb Enhances Bone Formation In Vivo and Osteoprogenitor Differentiation Ex Vivo

机译:转基因的表达Osteoactivin / gpnmb提高体内骨形成Osteoprogenitor体外分化

获取原文
获取原文并翻译 | 示例
           

摘要

Initial identification of osteoactivin (OA)/glycoprotein non-melanoma clone B (gpnmb) was demonstrated in an osteopetrotic rat model, where OA expression was increased threefold in mutant bones, compared to normal. OA mRNA and protein expression increase during active bone regeneration post-fracture, and primary rat osteoblasts show increased OA expression during differentiation in vitro. To further examine OA/gpnmb as an osteoinductive agent, we characterized the skeletal phenotype of transgenic mouse overexpressing OA/gpnmb under the CMV-promoter (OA-Tg). Western blot analysis showed increased OA/gpnmb in OA-Tg osteoblasts, compared to wild-type (WT). In OA-Tg mouse femurs versus WT littermates, micro-CT analysis showed increased trabecular bone volume and thickness, and cortical bone thickness; histomorphometry showed increased osteoblast numbers, bone formation and mineral apposition rates in OA-Tg mice; and biomechanical testing showed higher peak moment and stiffness. Given that OA/gpnmb is also over-expressed in osteoclasts in OA-Tg mice, we evaluated bone resorption by ELISA and histomorphometry, and observed decreased serum CTX-1 and RANK-L, and decreased osteoclast numbers in OA-Tg, compared to WT mice, indicating decreased bone remodeling in OA-Tg mice. The proliferation rate of OA-Tg osteoblasts in vitro was higher, compared to WT, as was alkaline phosphatase staining and activity, the latter indicating enhanced differentiation of OA-Tg osteoprogenitors. Quantitative RT-PCR analysis showed increased TGF-1 and TGF- receptors I and II expression in OA-Tg osteoblasts, compared to WT. Together, these data suggest that OA overexpression has an osteoinductive effect on bone mass in vivo and stimulates osteoprogenitor differentiation ex vivo. J. Cell. Physiol. 230: 72-83, 2016. (c) 2015 Wiley Periodicals, Inc.
机译:最初的识别osteoactivin(OA) /糖蛋白non-melanoma克隆B (gpnmb)演示了在一个osteopetrotic鼠模型,在OA表达增加三倍突变的骨头,而正常的。在活跃的骨蛋白表达增加再生集中,主要鼠在成骨细胞显示增加OA表达式在体外分化。OA / gpnmb作为论述代理,我们的骨骼表型特征转基因小鼠overexpressing OA / gpnmb下CMV-promoter (OA-Tg)。显示增加OA / gpnmb OA-Tg成骨细胞,相对于野生型(WT)。与WT的同胞,ct机分析显示增加骨小梁体积和厚度,和皮质骨厚度;显示成骨细胞数量增加,骨形成和矿产OA-Tg附着率老鼠;最大力矩和刚度。还在破骨细胞vegf OA-Tg老鼠,我们用ELISA和评估骨吸收histomorphometry,观察血清下降CTX-1 RANK-L,减少破骨细胞WT老鼠相比,数字OA-Tg指示减少骨重塑OA-Tg老鼠。OA-Tg成骨细胞在体外的增殖率高,而WT,碱性磷酸酶染色和活动,后者表明增强OA-Tg分化osteoprogenitors。显示TGF-1 TGF -受体我和增加二世在OA-Tg表达成骨细胞,相比WT。在一起,这些数据表明,OA超表达有影响骨量体内,刺激osteoprogenitor体外分化。72 - 83年,2016年。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号