鹿茸多肽对实验性骨折的治疗作用及机理研究

目的：探讨鹿茸多肽（ Ｐ Ａ Ｐ）治疗骨折的作用机理。方法：离体观察鹿茸多肽对３ Ｈ Ｔｄ Ｒ 掺入家兔肋软骨、人胚关节软骨及鸡胚头盖骨成骨样细胞的影响；整体利用大鼠完全缺损性挠骨骨折模型，观察鹿茸多肽 １０ 和 ２０ ｍ ｇ·ｋｇ－ １剂量对骨痂的形成、骨折的愈合以及骨痂内羟脯氨酸和钙含量的影响。结果：离体试验表明，鹿茸多肽１０～５０ ｍ ｇ· Ｌ－ １对家兔和人胚软骨细胞以及鸡胚头盖骨成骨样细胞都有促进有丝分裂作用，提示鹿茸多肽的细胞增殖作用无种属特异性。整体鹿茸多肽能明显加速骨痂的形成及骨折的愈合，明显增加骨痂内羟脯氨酸和钙含量。结论：鹿茸多肽通过促进骨、软骨细胞增殖及促进骨痂内骨胶原的积累和钙盐沉积而加速骨折愈合。

Therapeutic effect of pilose antler polypeptides (PAP) on experimental fracture and its mechanism

Objective:To test the therapeutic effect of PAP on experimental fracture and its mechanism.Methods:Effect of PAP on the incorporation of 〔 3H〕 TdR into DNA syntheses in the cells of rabbits costal cartilage and human embryonic joint as well as osteoblast precursor cells of embryonic chick calvaria in vitro and effect of PAP on the experimental radius fracture in rats in vivo were observed.Results:PAP of 10~50 μg·ml -1 showed mitogenic activities and significant promotion of DNA syntheses for various cartilage cells in vitro.In vivo experimental results revealed that PAP 10 and 20 mg·kg -1 could promote healing of radius fracture,accelerate osteotylus formation and increase contents of calcium and oxyproline.Conclusion:PAP accelerates fracture healing through promoting multiplications of cartilage and osteoblast precursor cells,collagen accumulation and calcium precipitation in osteotylus.