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柚皮苷对去势大鼠骨质疏松性骨折愈合的作用 被引量:10

Effects of naringin on bone healing of osteoporotic fracture in ovariectomized rats
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摘要 目的观察柚皮苷对去势大鼠骨质疏松骨折愈合的作用,探讨柚皮苷促进大鼠骨质疏松骨折愈合的机制。方法选择60只3个月龄雌性SD大鼠,行双侧卵巢切除,建立骨质疏松动物模型,2个月后制作右侧胫骨横行骨折。术后按随机数字表法分为对照组(20只)、柚皮苷组(20只)和雌激素组(20只)。柚皮苷组灌服柚皮苷100mg·kg-1·d-1;雌激素组灌服17—β雌二醇22.5μg·kg-1·d-1;对照组给予等体积的等渗盐水皮下注射。术后分别于2,8周处死动物,取出手术侧胫骨,行x线片进行评分;然后行双能x线吸收测定骨折部位骨密度(BMD);采用Micro—CT对骨折部位进行定量分析,检测指标:骨体积(BV)、相对骨体积比(BV/TV)、平均骨小梁厚度(Tb.Th);ELISA法测定血清骨钙素与大鼠I型胶原C端肽(CTX-1);三点弯曲力学试验测定骨折最大载荷。结果术后2周对照组、柚皮苷组、雌激素组x线片评分分别为0.6±0.6,1.2±0.5,1.4±0.6,柚皮苷组、雌激素组均较对照组比较差异有统计学意义(P〈0.05);术后8周对照组、柚皮苷组、雌激素组x线评分分别为2.6±0.6,3.6±0.6,3.6±0.6,柚皮苷组、雌激素组均较对照组比较差异有统计学意义(P〈0.05)。术后2周对照组、柚皮苷组、雌激素组BMD值分别为(117.4±4.4)mg/cm2、(129.4±2.8)mg/cm2、(127.6±3.0)mg/cm2,柚皮苷组、雌激素组均较对照组比较差异有统计学意义(P〈0.05);术后8周对照组、柚皮苷组、雌激素组BMD值分别为(119.0±3.8)mg/cm2、(132.0±5.8)mg/cm2、(133.8±3.2)mg,/cm2,柚皮苷组、雌激素组均较对照组比较差异有统计学意义(P〈0.05)。Micro—CT扫描显示柚皮苷组和雌激素组骨折断端骨小梁数目及骨小梁连续性明显多于对照组。术后2周对照组、柚皮苷组、雌激素组血骨钙素分别为(32.5±2.2)ng/L、(41.5±3.1)ng/L、(21.1±2.6)ng/L,任意两组比较差异均有统计学意义(P〈0.05);术后8周对照组、柚皮苷组、雌激素组血骨钙素分别为(16.7±3.8)ng/L、(37.0±2.9)ng/L、(29.7±4.0)ng/L,任意两组比较差异均有统计学意义(P〈0.05)。术后2周对照组、柚皮苷组、雌激素组血清CTX—1分别为(4.1±0.6)rig/ml、(3.0±0.8)mg/ml、(3.4±0.4)ng/ml,任意两组比较差异均有统计学意义(P〈0.05);术后8周对照组、柚皮苷组、雌激素组血清CTX-1分别为(3.0±0.7)ng/ml、(2.5±0.5)ng/m1、(2.7±0.3)ng/ml,柚皮苷组、雌激素组均较对照组比较差异有统计学意义(P〈0.05)。从2周到8周,所有组骨折的力学强度均随时间的增加而增强,且在2,8周柚皮苷组最用最强,优于对照组与雌激素组(P〈0.05)。结论柚皮苷可提高大鼠骨质疏松骨折BMD、BV、BV/TV、Tb.Th,改善骨代谢,从而提高骨折愈合的力学强度。 Objective To investigate the effect of nafingin on bone healing of osteoporotic fracture in ovarieetomized rats and the possible mechanism. Methods Sixty female SD rats, 3 months of age, were oophorectomized bilaterally before establishment of the osteoporotic model. Two months after the opera- tion, transverse fracture of fight tibia was induced. The rats were assigned to control group, naringin group and estrogen group according to the random number table, with 20 rats per group. Rats in naringin and estrogen groups were treated with naringin 100 mg/kg per day and 17-[3-estradiol 22. 5 ~g/kg per day respectively. Instead, isotonic saline solution of the same volume was administered subcutaneously in con- trol group. Animals in each group were killed at postoperative 2 and 8 weeks. The tibia was dissected to perform X-ray review, dual energy X-ray absorptiometry for measuring bone mineral density (BMD), and Micro-CT tomography for quantitative analysis of bone volume (BV), bone volume over total volume (BV/ TV) and trabecula thickness (Tb. Th). Serum levels of osteocalcin and C-telopeptide of type I collagen (CTX-1) were detected by the Elisa method. Maximum fracture load was tested by the three-point bend test. Results At postoperative 2 and 8 weeks, X-ray score and BMD were significantly higher in nar- ingin group [ X-ray score : ( 1.2 ± 0.5 ) points, ( 3.6 ± 0. 6 ) points ; BMD : ( 129.4 ± 2.8 ) mg/cm2, ( 132.0 ± 5.8 ) mg/cm2 ] and estrogen group [ X-ray score: ( 1.4 ± 0.6 ) points, ( 3.6 ± 0.6 ) points ; BMD : ( 127.6 ± 3.0) mg/cm2, ( 133.8 ± 3.2) mg/cm2 ] than in control group [ X-ray score : ( 0.6 ± 0.6)points, (2.6±0.6)points; BMD: (117.4±4.4)mg/cm2, (119.0±3.8)mg/cm2] (P〈0.05). Micro-CT imaging indicated more trabecular bone and better trabecular continuity in naringin and estrogen groups than in control group. At postoperative 2 and 8 weeks, serum levels of osteocalcin and CTX-1 differed significantly between only two of the groups ( P 〈 0. 05 ) : control group [ osteocalcin: ( 32. 5 ± 2. 2 ) ng/L, ( 16. 7 ± 3.8) ng/L; CTX-1 : (4.1 ± 0.6 ) ng/ml, ( 3.0 ± 0.7 ) ng/ml ], naringin group [ osteocalcin : (41.5 ± 3.1 ) ng/L, (37.0 ± 2. 9) ng/L ; CTX-1 : ( 3.0 ± 0.8 ) ng/ml, (2.5 ± 0.5 ) ng/ml ] and estrogen group [osteoealcin: (21.1 ± 2.6)ng/L, (29.7±4.0)ng/L; CTX-I: (3.4±0.4)ng/ml, (2.7± 0.3 )ng/ml]. Mechanical strength of all groups enhanced over time, with the maximum strength signifi- cantly higher in naringin group than in control and estrogen groups ( P 〈 0. 05 ). Conclusion Naringin promotes the mechanical strength in fracture healing by improving the BMD, BV, BV/TV and Tb. Th and ameliorating bone metabolism.
出处 《中华创伤杂志》 CAS CSCD 北大核心 2015年第4期370-375,共6页 Chinese Journal of Trauma
基金 天津市卫生局科技基金资助项目(2011KZ57) 天津市中医药管理局重点资助项目(13123)
关键词 胫骨骨折 骨质疏松 柚皮苷 Tibial fractures Osteoporosis Naringin
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