每周单次皮下注射rhPTH(1-34)促进大鼠的骨折愈合

被引:2
作者
马腾
张稳
郭琦
海宝
刘灿
宋纯理
机构
[1] 北京大学第三医院骨科
基金
国家高技术研究发展计划(863计划);
关键词
甲状旁腺激素片段; 骨折愈合; 每周给药; 每日给药; 大鼠;
D O I
暂无
中图分类号
R683 [骨折、骨的损伤]; R-33 [实验医学、医学实验];
学科分类号
100118 [医学信息学]; 100220 [骨科学];
摘要
目的观察每周单次皮下注射甲状旁腺激素rhPTH(1-34)促进大鼠骨折愈合的效果。方法 50只3月龄雄性SD大鼠左侧胫骨骨折,克氏针内固定术后,根据皮下注射rhPTH(1-34)的剂量及频次,随机分为5组(n=10/组):每周10、20μg/kg组;每日10、20μg/kg组;每周皮下注射等量(500μL)生理盐水作为对照组。治疗4周后处死取材,分别行小动物X线、双能X线、micro-CT及三点弯曲生物力学实验检测骨折愈合情况。结果无论每周或每日皮下注射rhPTH(1-34)骨密度均高于对照组(P<0.05);每周20μg/kg组骨折愈合效果好于对照组,其中rhPTH(1-34)每周20μg/kg组在骨密度、矿化的骨痂体积、骨痂总体积、矿化的骨痂体积占骨痂总体积百分数、最大载荷方面分别比对照组高26.2%、51.4%、21.6%、24.5%、29.3%。每周20μg/kg、每日10μg/kg及每日20μg/kg组的最大载荷均高于对照组(P<0.01);每周20μg/kg组骨密度、骨微结构、力学强度均与每日10μg/kg组无统计学差异(P>0.05)。结论每周皮下注射甲状旁腺激素(rhPTH1-34)(10、20μg/kg)可以促进骨折愈合,但相同单次剂量,每日皮下注射的效果仍优于每周皮下效果。
引用
收藏
页码:481 / 486
页数:6
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