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外源性硫化氢对去卵巢骨质疏松大鼠骨代谢及护骨素/细胞核因子κB受体活化因子配体表达的影响

2014-10-28欧琼黄余良张群锋

中国医药导报 2014年27期

欧琼 黄余良 张群锋

[摘要] 目的 探讨外源性硫化氢(H2S)对去卵巢骨质疏松(OP)大鼠骨代谢及护骨素(OPG)和细胞核因子κB受体活化因子配体(RANKL)表达的影响。 方法 将50只健康SD雌性大鼠随机分为对照组、去卵巢OP模型组和外源性H2S供体硫氢化钠(NaHS)(10、50、100 μmol/kg)组,每组10只。12周后检测各组大鼠的尿钙和尿脱氧吡啶啉(Dpd)及血清钙、磷、碱性磷酸酶(ALP)和雌二醇(E2)水平,采用双能X线吸收法测量大鼠右侧股骨的骨密度(BMD),采用Western blot检测股骨中OPG和RANKL的表达。 结果 与对照组比较,去卵巢OP模型组大鼠血清E2[(76.83±8.12)pmol/L比(11.05±1.42)pmol/L,t=5.74,P < 0.05]和BMD水平[(0.25±0.03)g/cm2比(0.14±0.01)g/cm2,t=3.85,P < 0.05]显著降低,尿钙[(0.85±0.08)mg/L比(1.88±0.21)mg/L,t=4.65,P < 0.05]、尿Dpd[(14.67±1.28)nmol/mmol比(22.34±1.75)nmol/mmol,t=3.81,P < 0.05]、血清钙[(3.29±0.27)mmol/L比(4.68±0.52)mmol/L,t=3.98,P < 0.05]、血清磷[(2.49±0.35)mmol/L比(4.03±0.59)mmol/L,t=4.31,P < 0.05]和ALP水平[(78.65±5.23)U/L比(167.35±1.75)U/L,t=4.47,P < 0.05]均显著升高;OPG的表达显著降低[(0.68±0.09)比(0.27±0.04),t=3.82,P < 0.05],而RANKL的表达显著增加[(0.18±0.02)比(0.66±0.09),t=3.91,P < 0.05]。与去卵巢OP模型组比较,NaHS(50、100 μmol/kg)组大鼠股骨的BMD显著增加[(0.14±0.01)g/cm2比(0.19±0.02)g/cm2和(0.23±0.03)g/cm2,F=6.42,P < 0.05],尿钙[(1.88±0.21)mg/L比(1.39±0.09)mg/L和(0.97±0.09)mg/L,F=4.67,P < 0.05]、尿Dpd[(22.34±1.75)nmol/mmol比(18.43±2.04)nmol/mmol和(15.75±1.14)nmol/mmol,F=3.92,P < 0.05]、血清钙[(4.68±0.52)mmol/L比(3.98±0.47)mmol/L和(3.56±0.25)mmol/L,F=3.89,P < 0.05]、血清磷[(4.03±0.59)mmol/L比(3.11±0.42)mmol/L和(2.68±0.26)mmol/L,F=4.23,P < 0.05]和ALP水平[(167.35±1.75)U/L比(115.69±8.72)U/L和(87.61±9.56)U/L,F=4.15,P < 0.05]显著降低,OPG的表达显著增加[(0.27±0.04)比(0.48±0.05)和(0.64±0.08),F=4.84,P < 0.05],而RANKL的表达显著降低[(0.66±0.09)比(0.37±0.05)和(0.22±0.04),F=5.16,P < 0.05]。 结论 外源性H2S抑制了卵巢切除所引起的OP,其作用机制可能与H2S上调骨组织中OPG的表达而降低RANKL的表达有关。

[关键词] 硫化氢;去卵巢;骨质疏松;护骨素;细胞核因子кB受体活化因子配体

[中图分类号] R274.9 [文献标识码] A [文章编号] 1673-7210(2014)09(c)-0026-05

Effects of extrogenous hydrogen sulfide on the bone metabolism and expressions of osteoprotegerin and receptor activator of nuclear factor kappa B ligand in ovariectomized rats with osteoporosis

OU Qiong HUANG Yuliang ZHANG Qunfeng

Department of Gynaecology and Obstetrics, the Second Affiliated Hospital, University of South China, Hu'nan Province, Hengyang 421001, China

[Abstract] Objective To investigate the effect of extrogenous hydrogen sulfide (H2S) on the bone metabolism and osteoprotegerin/receptor activator of nuclear factor kappa B ligand (OPG/RANKL) expressions in ovariectomized rats with osteoporosis. Methods 50 SD female rats were randomly divided into control group, ovariectomized osteoporosis model group, and extrogenous H2S donator sodium hydrosulfide (NaHS) (10, 50, 100 μmol/kg) treatment group, with 10 rats in each group. After 12 weeks, the levels of urine calcium and deoxypyridinoline (Dpd), serum calcium, serum phosphorus, serum alkaline phosphatase (ALP) and estradiol (E2) were measured. Bone mineral density (BMD) was measured by a dual-energy X-ray absorptiometry. The expessions of OPG and RANKL in femur were measured by Western blot. Results Compared with the sham control group, the levels of E2 in ovariectomized osteoporosis model group [(76.83±8.12) pmol/L vs (11.05±1.42) pmol/L, t=5.74, P < 0.05] and BMD [(0.25±0.03) g/cm2 vs (0.14±0.01) g/cm2, t=3.85, P < 0.05] were significantly decreased, the levels of urine calcium [(0.85±0.08) mg/L vs (1.88±0.21) mg/L, t=4.65, P < 0.05] and Dpd [(14.67±1.28) nmol/mmol vs (22.34±1.75) nmol/mmol,t=3.81,P < 0.05], serum calcium [(0.85±0.08) mg/L vs (1.88±0.21) mg/L, t=4.65, P < 0.05], serum phosphorus [(2.49±0.35) mmol/L vs (4.03±0.59) mmol/L, t=4.31, P < 0.05] and serum ALP [(78.65±5.23) U/L vs (167.35±1.75) U/L, t=4.47, P < 0.05] were significantly increased, the expression of OPG in the ovariectomized osteoporosis model group was significantly decreased [(0.68±0.09) vs (0.27±0.04), t=3.82, P < 0.05] and the expression of RANKL in the ovariectomized osteoporosis model group was significantly increased [(0.18±0.02) vs (0.66±0.09), t=3.91, P < 0.05] in the ovariectomized osteoporosis model group. Compared with the ovariectomized osteoporosis model group, the level of BMD in NaHS group (50, 100 μmol/kg) [(0.14±0.01) g/cm2 vs (0.19±0.02) g/cm2 and (0.23±0.03) g/cm2,F=6.42,P < 0.05] were significantly increased, the levels of urine calcium [(1.88±0.21) mg/L vs (1.39±0.09) mg/L and (0.97±0.09) mg/L, F=4.67, P < 0.05] and Dpd [(22.34±1.75) nmol/mmol vs (18.43±2.04) nmol/mmol and (15.75±1.14) nmol/mmol, F=3.92, P < 0.05], serum calcium [(4.68±0.52) mmol/L vs (3.98±0.47) mmol/L and (3.56±0.25) mmol/L, F=3.89, P < 0.05], serum phosphorus [(4.03±0.59) mmol/L vs (3.11±0.42) mmol/L and (2.68±0.26) mmol/L, F=4.23, P < 0.05] and serum ALP [(167.35±1.75) U/L vs (115.69±8.72) U/L and (87.61±9.56) U/L, F=4.15, P < 0.05] were significantly decreased, the expression of OPG in the ovariectomized osteoporosis model group were significantly up-regulated [(0.27±0.04) vs (0.48±0.05) and (0.64±0.08), F=4.84, P < 0.05] and the expression of RANKL were significantly down-regulated [(0.66±0.09) vs (0.37±0.05) and (0.22±0.04), F=5.16, P < 0.05] in the ovariectomized osteoporosis model group. Conclusion Extrogenous H2S inhibits the osteoporosis induced by ovariotomy in rats, the mechanism may be related to the up-regulation of OPG expression and the down-regulation of RANKL expression induced by H2S.

[Key words] Hydrogen sulfide; Osteoporosis; Ovariectomized; Osteoprotegerin; Receptor activator of nuclear factor kappa B ligand

骨质疏松症(osteoporosis,OP)是一种代谢性骨骼疾病,以骨量减少、骨质丢失、骨微观结构退化、脆性增加和易发生骨折为特征[1]。OP多发于60岁以上老年人,尤其是绝经后的妇女发病率更高,称为绝经后骨质疏松症(postmenopausal osteoporosis,PMOP)[2]。目前的研究认为PMOP的发生与体内雌激素的减少有关,因此对PMOP的治疗目前多采用的激素替代疗法,但是激素替代疗法可能增乳腺癌和子宫内膜癌的风险[3],因此寻找新的防治PMOP的途径具有十分重要的意义。硫化氢(hydrogen sulfide,H2S)是一种具有腐臭鸡蛋气味的气体,被认为体内的第三种气体信号分子。H2S在体内广泛分布,心血管、内脏、神经系统和骨骼均有分布[4]。H2S具有广泛的生理作用,也参与了许多疾病的发生发展。研究显示H2S能保护氧化应激诱导的成骨细胞的损伤,保护成骨细胞的功能[5-6]。因此本研究选择去卵巢大鼠作为……

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