变频振动在模拟微重力环境下对成骨细胞增殖和分化 的影响

目的观察变频振动在模拟微重力环境下对体外培养成骨细胞增殖和分化的影响。方法利用沿水平轴连续回转(30 r/min)细胞培养系统模拟微重力环境,应用电磁振动台将振动强度为0.5 g(g为加速度)在不同频率45 Hz、90 Hz、变频(5~90 Hz)振动应力作用于新生24 h大鼠颅盖骨成骨细胞,分别使用MTT比色法和碱性磷酸酶(ALP)活性测定了解成骨细胞的增殖和分化情况。结果模拟微重力环境可以抑制新生24 h大鼠颅盖骨成骨细胞的增殖和分化功能;90 Hz和5~90Hz变频振动促进模拟微重力环境成骨细胞的增殖功能(p0.01);45 Hz(p0.05)和5~90 Hz(p0.01)变频振动刺激对模拟微重力环境成骨细胞的分化功能具有一定的保护作用。结论在模拟微重力环境下机械振动对成骨细胞的增殖和分化功能具有保护作用,这为机械振动刺激防治微重力环境下骨丢失提供了理论和实验依据。     

不同强度正弦交变磁场对体外培养成骨细胞增殖与分化影响

目的研究频率为50Hz的不同强度正弦交变电磁场对体外培养成骨细胞(Osteoblasts,OB)的影响。方法原代培养大鼠颅骨成骨细胞,传代后随机分为9组,每组分别暴露在频率50Hz,磁场强度为0(对照组)、0.9、1.2、1.5、1.8、2.1、2.4、2.7、3.0mT的正弦交变磁场中,30min/次/d。倒置相差显微镜下观察细胞形态,48h后测定细胞增殖情况,第3、6、9、12、15d测定碱性磷酸酶(Alkaline Phosphatase,ALP)活性,第10d进行ALP组织化学染色,第12d进行茜素红钙化结节染色。结果成骨细胞于磁场暴露处理3d～4d后呈漩涡样分布;与对照组相比,0.9、1.2、1.5、1.8、2.1、2.7和3.0mT组均显著抑制细胞增殖(P0.01或P0.05),2.4mT组无明显影响(P0.05);除3.0mT组外,其它各组的ALP活性均高于对照组(P0.05),尤以1.8mT组最高(P0.01);1.2、1.5、1.8、2.1和2.4mT组的ALP阳性克隆数明显多于对照组,1.8mT组最多,0.9、2.7和3.0mT组与对照组无明显差别;茜素红钙化结节计数结果与ALP组织化学染色结果的趋势相一致。结论 50Hz,0.9mT～3.0mT的正弦交变磁场(2.4mT除外)均抑制体外培养成骨细胞的增殖,但能促进其分化成熟与钙化,尤以1.8mT效果最为明显。     

低频振动对人成骨细胞生物学特性影响的研究

目的研究低频振动对人成骨细胞增殖分化及基质分泌的影响.方法取成人的髂骨松质骨,获得人成骨细胞.并在培养48h后,施加0.1、0.2、0.5、2和5Hz的低频微振动,通过流式细胞仪检测成骨细胞增殖状况化学比色法和放射免疫法检测碱性磷酸酶(ALP)活性和骨钙素含量.结果加载 0.2和0.5Hz可使成骨细胞的ALP活性明显增高(P＜0.01);0.1和2Hz振动后其ALP活性与对照组无明显差异;5Hz振动则明显降低ALP活性(P＜ 0.01).加载 0.2和0.5Hz振动的成骨细胞,S期细胞从10.4%增加至12.45%和16.12%,增殖指数从20.14%增加到26.21%和 28.75%.0.1和2Hz低频振动则显示出对细胞增殖指数无明显影响(P＞0.05).而5Hz使细胞增殖指数明显降低至13.22%(P＜0.05).同时,加载0.2和0.5Hz振动可明显增加成骨细胞骨钙素分泌量至1.87和 2.47ng/ml(P＜0.05),而加载0.1Hz对骨钙素分泌量无明显影响(P＞0.05),加载2和5Hz相应降低了骨钙素分泌量(P＜0.05).结论0.2～0.5Hz的低频振动能促进成骨细胞增殖分化和成骨活性物质分泌,对低频振动应用于骨折治疗有指导作用.     

低频振动对人成骨细胞生物学特性影响的研究

目的:研究低频振动对人成骨细胞增殖分化及基质分泌的影响.方法:取成人的髂骨松质骨,获得人成骨细胞.并在培养48h后,施加0.1、0.2、0.5、2和5Hz的低频微振动,通过流式细胞仪检测成骨细胞增殖状况:化学比色法和放射免疫法检测碱性磷酸酶(ALP)活性和骨钙素含量.结果:加载 0.2和0.5Hz可使成骨细胞的ALP活性明显增高(P＜0.01);0.1和2Hz振动后其ALP活性与对照组无明显差异;5Hz振动则明显降低ALP活性(P＜ 0.01).加载 0.2和0.5Hz振动的成骨细胞,S期细胞从10.4%增加至12.45%和16.12%,增殖指数从20.14%增加到26.21%和 28.75%.0.1和2Hz低频振动则显示出对细胞增殖指数无明显影响(P＞0.05).而5Hz使细胞增殖指数明显降低至13.22%(P＜0.05).同时,加载0.2和0.5Hz振动可明显增加成骨细胞骨钙素分泌量至1.87和 2.47ng/ml(P＜0.05),而加载0.1Hz对骨钙素分泌量无明显影响(P＞0.05),加载2和5Hz相应降低了骨钙素分泌量(P＜0.05).结论:0.2～0.5Hz的低频振动能促进成骨细胞增殖分化和成骨活性物质分泌,对低频振动应用于骨折治疗有指导作用.     

低频振动对人成骨细胞生物学特性影响的研究

目的:研究低频振动对人成骨细胞增殖分化及基质分泌的影响。方法:取成人的髂骨松质骨,获得人成骨细胞。并在培养48h后,施加0.1、0.2、0.5、2和5Hz的低频微振动,通过流式细胞仪检测成骨细胞增殖状况:化学比色法和放射免疫法检测碱性磷酸酶(ALP)活性和骨钙素含量。结果:加载0.2和0.5Hz可使成骨细胞的ALP活性明显增高(P<0.01);0.1和2Hz振动后其ALP活性与对照组无明显差异;5Hz振动则明显降低ALP活性(P<0.01)。加载0.2和0.5Hz振动的成骨细胞,S期细胞从10.4％增加至12.45％和16.12％,增殖指数从20.14％增加到26.21％和28.75％。0.1和2Hz低频振动则显示出对细胞增殖指数无明显影响(P>0.05)。而5Hz使细胞增殖指数明显降低至13.22％(P<0.05)。同时,加载0.2和0.5Hz振动可明显增加成骨细胞骨钙素分泌量至1.87和2.47ng/ml(P<0.05),而加载0.1Hz对骨钙素分泌量无明显影响(P>0.05),加载2和5Hz相应降低了骨钙素分泌量(P<0.05)。结论:0.2～0.5Hz的低频振动能促进成骨细胞增殖分化和成骨活性物质分泌,对低频振动应用于骨折治疗有指导作用。     

羊胎素对体外成骨细胞增殖、分化及矿化功能的影响

目的 观察羊胎素在体外对新生大鼠颅骨成骨细胞增殖、分化及矿化功能的影响。方法将提取之羊胎素稀释加入体外培养的SD新生大鼠颅骨成骨细胞体系中,终浓度分别为0.625％、1.25％、2.5％、5％和10％;加药后24、48和96 h用MTT法检测细胞的增殖并绘制生长曲线:培养5 d时用PNPP法测定细胞碱性磷酸酶(ALP)活性;培养31 d时用茜素红染色2.5％羊胎素组形成之矿化骨结节,用图像分析仪计算骨结节的面积。结果 所有含羊胎素浓度组,其MTT法测得的A值都显著高于空白对照组(P<0.01),生长曲线表现为含羊胎素组的细胞增殖加快,以2.5％浓度组最为显著;ALP结果显示,羊胎素各浓度组的碱性磷酸酶活性都显著高于空白对照组(P<0.01);茜素红染色后显示,2.5％羊胎素组所形成的骨结节面积显著高于空白对照组(P<0.01)。结论羊胎素对体外培养的SD新生大鼠颅骨成骨细胞有显著的促进增殖、分化和矿化的作用。     

过氧化物酶体增殖物激活受体激动剂罗格列酮对大鼠成骨细胞增殖和分化的影响

目的 观察过氧化物酶体增殖物激活受体PPARγ2的激动剂罗格列酮对大鼠成骨细胞增殖和分化能力的影响。方法 取新生SD大鼠颅骨进行原代培养,经碱性磷酸酶ALP染色和矿化结节检测鉴定为成骨细胞。实验分为6组:取第3代细胞接种至96孔板,根据加入罗格列酮的浓度的不同分为A、B、C、D、E、F组(浓度分别为0、1、2、5、10、20 μmol/L),A组为对照组,B～F组为实验组。每组5个复孔,经罗格列酮作用24h后,应用噻唑蓝(MTT)比色法和PNPP法检测大鼠成骨细胞增殖和ALP活性的变化。结果 作用24h后,6种浓度罗格列酮对大鼠成骨细胞增殖作用均无影响,且组间差异无统计学意义(F=1.335,P＞0.05);但各实验组大鼠成骨细胞ALP活性均较对照组降低,并具浓度依赖性,组间差异有统计学意义(F=82.304,P＜0.01)。结论 一定剂量的罗格列酮对大鼠成骨细胞无明显促增殖作用,但却明显抑制了大鼠成骨细胞的分化,表明罗格列酮可影响成骨活性,提示PPARγ2参与了机体的成骨过程,在骨质疏松的发病中发挥一定了的作用。     

流体切应力促成骨细胞通过细胞周期G1/S调控点机制的研究

[目的] 探讨流体切应力(FSS)促成骨细胞增殖、分化作用与细胞周期从G1期向S期转化机制的关系,为确立最佳生理应力刺激骨再生提供依据.[方法] 从KM乳鼠颅盖骨提取原代成骨细胞,在体外流体小室内分别受FSS(12 dyn/cm2)作用0、0.25、0.5、1、2、4 h,通过MTT法分析细胞增殖能力,并利用碱性磷酸酶(ALP)的表达评价其分化能力;通过流式细胞仪、免疫荧光染色和RT-PCR测定细胞周期G1/S百分比、细胞周期依赖激酶2和4(CDK2、CDK4)的活性改变及E2F1、p27mRNA的表达实现FSS促成骨细胞由G1期转向S期的测定.[结果] FSS促增殖作用在短期(0.25 h、0.5 h)明显,并且细胞生长曲线前移;但在1、2、4 h却有明显抑制增殖作用.FSS同样增加了ALP的活性,尤其在应力作用0.25、0.5 h时显著(比对照达128%和158%);而应力作用1、2、4 h后减低了ALP的表达.在FSS作用1 h内细胞周期S期百分比增高,作用0.5 h后与对照组比较明显增高(P<0.05);但随着时间的增加细胞周期S期百分比开始下降,当作用时间持续4 h后S期百分比下降明显(P<0.05).流体切应力增加了活化pRb的CDK2、CDK4的活性,而且与CDK2相关的E2F1表达量也明显增加;而细胞周期依赖激酶抑制剂p27在流体切应力作用下有所下降.其中流体切应力在0.25 h、0.5 h明显增加了E2Fl mRNA的表达水平(P<0.05),此效应在作用1 h后减退.[结论] 适宜的流体切应力通过上调CDK2、CDK4及E2F1,下调p27,使细胞从G1期转化到S期,在流体切应力促成骨细胞增殖、分化机制中起重要作用;并且这种作用有明显的FSS作用时间限制性.     

镁锌合金在体外对MC3T3-E1细胞增殖、分化和矿化的影响

目的 观察镁锌合金(Mg-zn)在体外的降解及对小鼠前成骨细胞(MC313-E1)增殖、分化和矿化的影响,探讨Mg-Zn成为新型骨科内植物材料的可行性.方法 Mg-Zn和纯镁(Mg)试样置入模拟体液(SBF)中,3 d后通过电化学方法和静态浸泡失重的方法来测定其腐蚀电位及腐蚀速率;在Mg-Zn上接种MC3T3-E1细胞,采用噻唑蓝(MTT)比色法检测1、3、5、7、9 d时细胞增殖活性,采用碱性磷酸酶(ALP)检测试剂盒检测14、28 d时细胞ALP活性,并用四环素荧光染色检测14d时矿化结节.与左旋聚乳酸(PLLA)作对照研究.结果 Mg-Zn的腐蚀电位增高,腐蚀速率降低;培养第5、7、9天后,Mg-Zn成骨细胞增殖活性明显高于PLLA(P<0.01);14、28 d时,Mg-Zn ALP活性明显高于PuA(P<0.01);Mg-Zn矿化结节面积明显大于PLLA(P<0.01).结论 Mg-Zn明显改善了Mg的耐腐蚀性能,同时能促进MC333-E1细胞的增殖、分化和矿化功能,具有良好的生物相容性.     

铁饱和乳铁蛋白对大鼠成骨细胞增殖与分化的影响

目的 探讨铁饱和乳铁蛋白对体外培养的大鼠成骨细胞增殖和分化的影响.方法 用酶消化法分离大鼠颅盖骨成骨细胞进行原代培养;乳铁蛋白螯合Fe~(2+)获得铁饱和乳铁蛋白;将其稀释到不同浓度作用于成骨细胞,四唑盐比色法(MTT)测定细胞增殖;碱性磷酸酶法(ALP)测定细胞碱性磷酸酶活性.结果 随着时间的增加,各浓度组均可促进成骨细胞增殖及增强碱性磷酸酶活性.其中100 μg/mL浓度组在72 h时细胞增殖数目最大、碱性磷酸酶活性最高,较对照组有统计学意义(P＜0.01).结论 铁饱和乳铁蛋白能促进大鼠成骨细胞的增殖和分化.     

Importance of echocardiography in prognosis of surgical outcomes in cholecystitis in elderly patients

The authors propose to use more often echocardiography (EchoCG) in examination of elderly (over 60 years) of age patients with cholecystitis that permits to increase surgical activity to 92.4%. Left ventricular ejection fraction is the most informative. When this fraction is lower than 45% surgery must be recommended on vital indications only. EchoCG was used in 155 patients with cholecystitis, 131 of them were operated. 2 (1.52%) patients died due to acute cardio-vascular insufficiency and pulmonary artery thromboembolism.     

杭州健康女性定量骨超声测定原发性骨质疏松

目的 评价杭州健康女性骨超声速度(SOS)值随增龄减少和骨质疏松患病率，建立杭州地区女性骨超声速度值参考数据库。方法 定量超声法测定1208例杭州地区健康女性桡骨远端(RAD)，第3指骨近节(PLX)，第V跖骨(MTR)和胫骨中段(TIB)的超声速度值。结果 RAD、PLX、MTR和TIBSOS峰值(Peak of SOS)均出现在40-45岁，TJB的SOS峰值出现在35—40岁，此后随年龄增长而下降。绝经后妇女在绝经后早期和晚期各有1个SOS快速减少期，前见于桡骨近端，平均年减少率为2．4％，后见于胫骨中段，平均年减少率为1．8％。各部位骨SOS累积减少率随年龄增长而增加，到85岁4部位累积减少为13％-18％。60岁以后骨质疏松性症(OP)检出率为45％-70％，OP检出率以桡骨远端最高，60-70岁平均为67％，第3指骨近端次之约50％，胫骨中段最低为36％；75岁以后分别为70％，65％和45％。结论 全身各部位骨超声速度值到达峰值的年龄不同，峰值也各有差异。绝经后妇女骨超声速度值随年龄增加减少较快，应予激素和补钙治疗，桡骨远端为本地区SOS检测和OP检出的敏感部位。     

中脑导水管周围灰质小胶质细胞活化在大鼠神经病理性痛中的作用

目的 评价中脑导水管周围灰质小胶质细胞活化在大鼠神经病理性痛中的作用.方法 雄性SD大鼠176只,体重200 ～ 250 g,9周龄,采用随机数字法,将其分为4组:假手术组(S组,n=40)、神经病理性痛组(NP组,n=40)、生理盐水组(NS组,n=48)和米诺环素组(M组,n=48).NP组、NS组和M组采用慢性坐骨神经缩窄性损伤法制备大鼠神经病理性痛模型;S组仅暴露坐骨神经,而不结扎.术后第7天时,NS组和M组分别于中脑导水管周围灰质的腹外侧区注射生理盐水或米诺环素0.5μl.取8只大鼠,分别于术前1 d(T0)、术后第3天(T1)、第7天给药前30 min(T2)、第7天给药后30 min(T3)、第14天(T4)和第21天(T5)时测定机械痛阈.于T1-5时各处死8只大鼠,取脑组织,行小胶质细胞计数.结果 与S组比较,NP组、NS组和M组T1-5时机械痛阈降低,小胶质细胞计数升高(P＜0.05);NP组和NS组各时点机械痛阈和小胶质细胞计数差异无统计学意义(P＞0.05);与NP组和NS组比较,M组T3时机械痛阈升高,小胶质细胞计数降低(P＜0.05).结论 中脑导水管周围灰质小胶质细胞的活化参与了大鼠神经病理性痛中的形成与维持.     

沈阳男性髋部骨折多于女性原因探讨

为找出沈阳地区髋部骨折发生男性多于女性的原因，探索该病在不发达国家或地区的流行特点，我们再次通过查阅病例记录，对沈阳市１９９４年５０岁以上人口的部分髋部骨折病发生的原因进行了较详细的调查分析。共调查分析２６６髋部骨折病例，其中男１６３例，女１０３例。损伤原因记为单纯摔倒（滑倒或绊倒）、骑自行车摔倒、自行车撞倒、机动车事故和高位跌下（滚楼梯或从较高位置掉下）。结果表明：男女在髋部骨折伤因构成上有差别（Ｐ＝０．００４）。女性髋部骨折的大多数（７０％）是由单纯摔倒引起，而在男性则不足一半（４９％），即男性髋部骨折的一半以上不是由于单纯摔倒而是由各种意外事故造成的（Ｐ＝０．０００８）。在各种意外事故中，男性骑自行车摔倒引起骨折的频率（２８％）明显高于女性（１０％）。除了骑自行车摔倒外，男性由自行车撞倒和高位跌下引起骨折的频率稍高于女性，但无太大差别。机动车事故造成骨折的频率男女基本一致。此结果在一定的程度上说明，１９９４年沈阳５０岁以上的男性髋部骨折发病率高是由于男性发生的各种意外事故多，尤其是骑自行车引起的事故造成的。     

脊髓胶质细胞在大鼠炎性痛形成中的作用

目的 评价脊髓胶质细胞在大鼠炎性痛形成中的作用.方法 清洁Ⅱ级成年雄性SD大鼠,体重180～220 g,取蛛网膜下腔置管成功的大鼠65只,随机分为5组(n=13),生理盐水组(NS组):右后肢踝关节外侧皮下注射NS 50μl;炎性痛组(IP组):采用右后肢踝关节外侧皮下注射完全弗氏佐剂50μl的方法制备炎性痛模型;氟代柠檬酸组(FC组):经蛛网膜下腔导管注射FC 1 nmol/10 μl,15 min后右后肢踝关节外侧皮下注射NS 50 μl;NS+IP组:经蛛网膜下腔导管注射NS 10 μl,15 min后制备炎性痛模型;FC+IP组:经蛛网膜下腔导管注射FC 1 nmol/10 μ,15 min后制备炎性痛模型.于模型制备前2 d(T_0)、皮下注射药物前(T_1)和注射药物后2、4、6、8、10、12、24、26 h(T_(2～9))时测定机械缩足阈值(MWT)和热缩足潜伏期(TWL).皮下注射药物后8 h时采用免疫组化法测定脊髓背角星形胶质细胞标记物(GFAP)和小胶质细胞标记物(OX-42)的表达水平.结果 与NS组比较,IP组和NS+IP组T_(3～9)时MWT和TWL降低,FC+IP组T_(3～9)时MWT降低,T_(8,9)时TWL降低,IP组、NS+EP组和FC+EP组脊髓GFAP和OX-42的表达水平均上调(P<0.05);与IP组比较,FC组T_(3～9)时MWT和TWL升高,FC+IP组T_(3～7)时MWT和TWL升高,2组脊髓GFAP和OX-42的表达水平均下调(P<0.05或0.01).结论 脊髓胶质细胞的活化参与了大鼠炎性痛的形成.     

脊髓胶质细胞在小鼠骨癌痛形成中的作用

Objective To evaluate the role of gliocyte in the spinal cord in the development of bone cancer pain (BCP) in mice. Methods Forty male C3H/He mice aged 8-10 weeks weighing 18-22 g were randomly divided into 4 groups ( n = 10 each) : group I sham operation (group S) , group II BCP, group Ⅲ PBS and group IV minocyline (group M) . In group BCP, PBS and M, bone cancer pain was produced by injection of NCTC2472 fibrosarcoma cell suspension (2 x 105 cells) 10 μl into medullary cavity of calcaneus bone, while in group S, PBS solution 10 μl was injected instead of cancer cell suspension. In group PBS and M, PBS 5 μl and minocyline 5 μl (dissolved to 0.2 mmol/L in PBS)_were given IT immediately before cancer cell inoculation once a day for 11 consecutive days respectively. Mechanical pain threshold was measured at 1 d before cancer cell inoculation, and at 0, 3, 5, 7, 9 and 11d after cancer cell inoculation. Cold pain threshold was measured at 3, 7, 9 and 11d after cancer cell inoculation. The animals were killed after measurement of pain threshold and L4-6, segment of spinal cord was removed for determination of GFAP and CD11b expression by Western blot. Results Compared with group S, mechanical pain threshold was significantly increased at 3-11 d after cancer cell inoculation in group BCP and PBS, and at 3 and S d after cancer cell inoculation in group M, and cold pain threshold was significantly increased at 7-11 d after cancer cell inoculation, and expression of CD11b and GFAP was up-regulated in group BCP, PBS and M ( P < 0.05) . Compared with group BCP, mechanical pain threshold was significantly decreased at 3-11 d after cancer cell inoculation, cold pain threshold was significantly decreased at 7-11 d after cancer cell inoculation, and expression of CD11b and GFAP was down-regulated in group M ( P <0.05) . ConclusionThe activiton of gliocyte in the spinal cord is involved in the development of bone cancer pian in mice.     

脊髓胶质细胞在小鼠骨癌痛形成中的作用

Objective To evaluate the role of gliocyte in the spinal cord in the development of bone cancer pain (BCP) in mice. Methods Forty male C3H/He mice aged 8-10 weeks weighing 18-22 g were randomly divided into 4 groups ( n = 10 each) : group I sham operation (group S) , group II BCP, group Ⅲ PBS and group IV minocyline (group M) . In group BCP, PBS and M, bone cancer pain was produced by injection of NCTC2472 fibrosarcoma cell suspension (2 x 105 cells) 10 μl into medullary cavity of calcaneus bone, while in group S, PBS solution 10 μl was injected instead of cancer cell suspension. In group PBS and M, PBS 5 μl and minocyline 5 μl (dissolved to 0.2 mmol/L in PBS)_were given IT immediately before cancer cell inoculation once a day for 11 consecutive days respectively. Mechanical pain threshold was measured at 1 d before cancer cell inoculation, and at 0, 3, 5, 7, 9 and 11d after cancer cell inoculation. Cold pain threshold was measured at 3, 7, 9 and 11d after cancer cell inoculation. The animals were killed after measurement of pain threshold and L4-6, segment of spinal cord was removed for determination of GFAP and CD11b expression by Western blot. Results Compared with group S, mechanical pain threshold was significantly increased at 3-11 d after cancer cell inoculation in group BCP and PBS, and at 3 and S d after cancer cell inoculation in group M, and cold pain threshold was significantly increased at 7-11 d after cancer cell inoculation, and expression of CD11b and GFAP was up-regulated in group BCP, PBS and M ( P < 0.05) . Compared with group BCP, mechanical pain threshold was significantly decreased at 3-11 d after cancer cell inoculation, cold pain threshold was significantly decreased at 7-11 d after cancer cell inoculation, and expression of CD11b and GFAP was down-regulated in group M ( P <0.05) . ConclusionThe activiton of gliocyte in the spinal cord is involved in the development of bone cancer pian in mice.     

脊髓胶质细胞在小鼠骨癌痛形成中的作用

Objective To evaluate the role of gliocyte in the spinal cord in the development of bone cancer pain (BCP) in mice. Methods Forty male C3H/He mice aged 8-10 weeks weighing 18-22 g were randomly divided into 4 groups ( n = 10 each) : group I sham operation (group S) , group II BCP, group Ⅲ PBS and group IV minocyline (group M) . In group BCP, PBS and M, bone cancer pain was produced by injection of NCTC2472 fibrosarcoma cell suspension (2 x 105 cells) 10 μl into medullary cavity of calcaneus bone, while in group S, PBS solution 10 μl was injected instead of cancer cell suspension. In group PBS and M, PBS 5 μl and minocyline 5 μl (dissolved to 0.2 mmol/L in PBS)_were given IT immediately before cancer cell inoculation once a day for 11 consecutive days respectively. Mechanical pain threshold was measured at 1 d before cancer cell inoculation, and at 0, 3, 5, 7, 9 and 11d after cancer cell inoculation. Cold pain threshold was measured at 3, 7, 9 and 11d after cancer cell inoculation. The animals were killed after measurement of pain threshold and L4-6, segment of spinal cord was removed for determination of GFAP and CD11b expression by Western blot. Results Compared with group S, mechanical pain threshold was significantly increased at 3-11 d after cancer cell inoculation in group BCP and PBS, and at 3 and S d after cancer cell inoculation in group M, and cold pain threshold was significantly increased at 7-11 d after cancer cell inoculation, and expression of CD11b and GFAP was up-regulated in group BCP, PBS and M ( P < 0.05) . Compared with group BCP, mechanical pain threshold was significantly decreased at 3-11 d after cancer cell inoculation, cold pain threshold was significantly decreased at 7-11 d after cancer cell inoculation, and expression of CD11b and GFAP was down-regulated in group M ( P <0.05) . ConclusionThe activiton of gliocyte in the spinal cord is involved in the development of bone cancer pian in mice.