地塞米松对不同月龄雌性大鼠成骨细胞雌激素受体表达的影响

目的观察体外培养的不同月龄雌性大鼠成骨细胞内雌激素受体水平的差异及地塞米松（1×10^-8mol/L）对不同月龄雌性大鼠成骨细胞雌激素受体表达的影响。方法采用酶消化法分别提取、纯化和培养新生（24h以内）、2、4、8、12月龄雌性Wistar大鼠成骨细胞,并且用Western-blot、ECL法检测体外培养成骨细胞雌激素受体的水平。结果提取的大鼠成骨细胞生长情况良好,碱性磷酸酶染色阳性,具有成骨细胞特性。Western-blot结果显示：雌性大鼠成骨细胞内雌激素受体水平在新生鼠和8月龄鼠较高,在2、4、12月龄鼠较低;地塞米松组成骨细胞雌激素受体表达水平在新生和2月龄低于对照组,在4、8、12月龄高于对照组。结论不同月龄雌性大鼠体外培养的成骨细胞雌激素受体的表达水平不同;1×10^-8mol/L地塞米松对体外培养的雌性大鼠成骨细胞雌激素受体水平有影响且与大鼠的月龄有关。     

雄激素对体外成骨细胞QPG及其配体基因表达的影响

目的检测小鼠胎鼠成骨细胞体外培养并将不同浓度雄激素干预后,OPG和OPGLmRNA表达的变化,探讨雄激素在成骨细胞介导破骨细胞分化、活化过程中的调控机制。方法分离得到小鼠胎鼠颅盖骨成骨细胞,培养传代并选择第二代细胞用于实验;对第二代成骨细胞实施含10-10mol/L、10-9mol/L、10-8mol/L3种浓度雄激素的培养液干预;抽提细胞RNA,采用RT-PCR方法半定量观察成骨细胞中OPG和OPGL基因mRNA表达的变化。结果实验选用的各浓度组均未出现细胞毒性反应,雄激素干预使成骨细胞中OPG基因表达上调,而OPGL与OPG比率随时间呈递减趋势。结论雄激素可以特异性地在转录水平调节成骨细胞中OPG和OPGL基因的表达。     

神经肽对大鼠成骨细胞胰岛素样生长因子-1及其受体基因表达的影响

目的观察神经肽类物质降钙素基因相关肽（CGRP）、P物质（SP）在鼠成骨细胞表面受体的分布，探讨神经肽对大鼠成骨细胞胰岛素样生长因子（IGF）-1和胰岛素样生长因子1型受体（IGF-1R）基因表达的调控作用。方法取出生1d的Wistar大鼠颅盖骨成骨细胞进行体外原代和传代培养，应用免疫组织化学技术检测体外培养的鼠成骨细胞表面神经肽受体的分布情况，用不同浓度的CGRP和SP分别对传代成骨细胞处理6、12和24h，原位杂交技术检测观察成骨细胞二种目的基因（IGF-1、IGF-1R）的mRNA表达强度变化以及时间效应和剂量．效应的关系。结果（1）大鼠成骨细胞表面有CGRP、SP受体表达。（2）CGRP可以刺激成骨细胞IGF-1mRNA表达，以10^-8mol／L作用12h最为明显。CGRP亦能够上调成骨细胞IGF一1RmRNA表达，而且维持时间达24h具有明显的剂量时间依赖性。（3）SP可以刺激成骨细胞IGF-1mRNA表达，以10^-6mol／L作用12h最为明显。SP亦能够上调成骨细胞IGF-1RmRNA表达，而且维持时间达24h具有明显的剂量时间依赖性。结论神经肽CGRP，SP通过增强IGF-1的自分泌作用即诱导内源性IGF基因表达来间接地调节成骨细胞活性，从而发挥成骨效应。     

17β-雌二醇下调人成骨细胞CTGF表达的信号转导机制研究

目的 探讨17β-雌二醇下调人成骨细胞CTGF表达的信号转导机制。方法 人成骨细胞分别用10^-8mol／LE2及雌激素受体拮抗剂ICI182780、PKA阻断剂H-89、PKC阻断剂H-7、NF-kB阻断剂PDTC、PKA活化剂forskolin干预24h，采用Northern blotting、Western blotting分析CTGFmRNA、蛋白表达水平的变化。结果 10^-8mol／L雌二醇可明显下调人成骨细胞CTGFmRNA及蛋白的表达；PKA阻断剂H-89可完全阻断雌二醇对CTGF的降调节作用，而雌激素受体拮抗剂ICI182780、PKC阻断剂H-7、NF-kB阻断剂PDTC对雌二醇介导的CTGF降调节无明显作用。PKA活化剂forskohn可明显下调人成骨细胞CTGFmRNA、蛋白的表达，雌二醇组与forskolin组相比，CTGFmRNA、蛋白的水平无明显差异。结论 17β-雌二醇下词人成骨细胞CTGF表达由PKA介导，雌激素核受体、PKC、NF-kB信号转导通路均不参与雌激素介导的CTGF降调节。     

染料木黄酮对成骨细胞内游离钙、钙调素水平及ALP、ATP酶的影响

目的研究不同浓度的染料木黄酮（genistein，GEN）对体外培养大鼠成骨细胞游离钙、钙调素、碱性磷酸酶（alkaline phosphatase，ALP）、ATP酶的影响。方法采用新生大鼠颅骨分离培养成骨细胞，加入不同浓度的染料木黄酮（10^-8mol／L，10^-7mol／L，10^-6mol／L，10^-5mol／L），以妊马雌酮（商品名：倍美力）（10^-8mol／L，10^-7mol／L，10^-6mol／L，10^-5mol／L）作为阳性对照组，用PNPP（对硝基苯磷酸盐）法测定ALP活性、放射生物法测定钙调素水平、激光扫描共聚焦显微镜测定细胞游离钙、比色法测定ATP酶活性。结果染料木黄酮对成骨细胞钙调素、ALP、Ca^2＋-ATP、细胞内游离钙水平的影响呈正相关性，并与其剂量成正相关性，但这些作用均低于雌激素水平（P〈0．01）。结论染料木黄酮能增加成骨细胞ALP、Ca^2＋-ATP活性和钙调素水平、钙离子震荡波，并与其浓度有关，作用与雌激素相似。     

17-β雌二醇对不同月龄大鼠成骨细胞雌激素受体β表达的影响

目的探讨17-β雌二醇对不同月龄大鼠成骨细胞雌激素受体β（ERβ）表达的影响。方法雌性大鼠颅盖骨经多次酶消化、反复贴壁法分离纯化培养得到大量纯净成骨细胞并进行形态学检查和碱性磷酸酶（ALP）染色;免疫组化法（SABC）进行雌激素受体染色;用10-8mol/L17-β雌二醇处理培养的成骨细胞,SDS-PAGE电泳和western blot法检测雌激素受体。结果成骨细胞碱性磷酸酶染色阳性率为90%以上。形态学检查符合成骨细胞的特征。免疫组化染色显示大鼠的成骨细胞存在雌激素受体β,且位于胞核内。Western blot结果表明,与对照组相比,处理组的各月龄大鼠雌激素受体β表达均有上调。结论17-β雌二醇能提高各月龄组大鼠成骨细胞雌激素受体β表达水平,不同月龄间上调水平不同,以4、8月龄组最为显著。     

转化生长因子β对大鼠成骨细胞雌激素受体表达的影响

目的探讨转化生长因子β对大鼠成骨细胞雌激素受体表达的影响。方法实验中取雌性SD大鼠4肢松质骨,应用胶原酶消化法得到大量纯净成骨细胞;进行形态学观察,检测不同培养时间的细胞培养液的上清液中成骨细胞特征性分泌物:碱性磷酸酶(AKP)和骨钙素(OCN)的含量;碱性磷酸酶(ALP)染色(改良Gomori氏钙钴法);通过免疫组化法(SP法)进行雌激素受体染色;用不同浓度的TGFβ作用于体外培养的成骨细胞,进行SDSPAGE电泳和Westernblot检测雌激素受体。结果成骨细胞上清液AKP和OCN的分泌量明显高于成纤维细胞(P<0.01),形态学观察符合成骨细胞的特征。经免疫组化染色大鼠的成骨细胞存在雌激素受体,且位于胞核内。Westernblot结果显示,雌激素受体在TGFβ浓度为0.1～0.5ngml时,有较强的荧光发光信号条带。结论TGFβ在浓度为0.1～0.5ngml时,能提高成骨细胞雌激素受体基因表达水平,这可为研究TGFβ对于成骨细胞雌激素受体的作用机制及骨代谢疾病药物筛选提供新的支持。     

VP3基因联合吉西他滨诱导人膀胱癌细胞凋亡的实验研究

目的探讨鸡贫血病毒VP3基因在人膀胱癌EJ细胞株中的表达,观察VP3基因联合吉西他滨诱导人膀胱癌EJ细胞株凋亡的效应。方法用真核表达载体PcDNA3-VP3转染人膀胱癌EJ细胞株,利用RT-PCR技术检测VP3基因在EJ细胞中的表达状况。观察VP3基因和10^-7mol／L、10^-8mol／L、10^-9mol／L浓度吉西他滨在体外单独或联合用药对人膀胱癌EJ细胞的增殖活性的影响,检测VP3基因和10^-8mol／L浓度吉西他滨在体外单独或联合用药对人膀胱癌EJ细胞的凋亡作用。结果转染PcDNA3-VP3后VP3基因在EJ细胞中表达。转染重组质粒PcDNA3-VP3、吉西他滨各浓度、VP3基因联合吉西他滨各浓度的EJ细胞株的增殖活性明显下降（P〈0．01）。透射电镜下观察到凋亡细胞的典型形态学特征。TUNAL法检测EJ细胞株凋亡率表现为：转染PcDNA3-VP3组高于对照组（P〈0．01）,10^-8mol／L浓度的吉西他滨组高于对照组（P〈0．01）,联合组高于转染PcDNA3-VP3组（P〈0．01）。结论VP3基因表达能高效诱导人膀胱癌EJ细胞株细胞凋亡,联合10^-8mol／L浓度的吉西他滨能增加VP3基因诱导的人膀胱癌EJ细胞株凋亡。     

17β-雌二醇对子宫内膜异位症患者在位子宫内膜问质细胞β-catenin mRNA和蛋白表达的影响

目的研究17β-立群雌二醇（17β-E2）对子宫内膜异位症（内异症）患者在位子宫内膜间质细胞β-catenin mRNA和蛋白表达的影响，探讨Wnt／β-catenin信号通路在介导雌激素促进内异症发生发展的作用。方法体外分离培养内异症患者在位子宫内膜间质细胞。用不同浓度17β-E2处理子宫内膜间质细胞48h；此后选用10^-10mol／L 17β-E2处理子宫内膜间质细胞12、24和48h，逆转录聚合酶链反应（RT-PCR）和免疫印迹法（Western blotting）检测17β-E2处理前后子宫内膜间质细胞β-catenin mRNA和蛋白的表达水平。同法分析雌激素受体拮抗剂ICI182，780（10μmol／L）对17β-E2促进β-catenin mRNA和蛋白表达的影响。免疫组织化学染色观察17β-E2作用后β-catenin在子宫内膜间质细胞中的定位。结果17β-E2能明显促进内异症患者在位子宫内膜间质细胞β-catenin mRNA和蛋白的表达，并呈剂量和时间依赖性，于10^-10mol／L作用48h最明显。雌激素受体拮抗剂ICI182，780能明显抑制17β-E2对子宫内膜间质细胞β-catenin mRNA和蛋白的表达。免疫组织化学染色发现17β-E2能促进β-catenin在子宫内膜间质细胞核内的表达。结论雌激素可能通过激活Wnt／β-catenin信号通路促进内异症在位子宫内膜的异位种植。     

PDGF-BB对成年雌性大鼠成骨细胞雌激素受体α蛋白质表达影响的实验研究

目的通过研究PDGF—BB与ERα的关系，探讨PDGF—BB在骨代谢中的作用机理，并对其在骨质疏松症中的应用前景进行展望。方法①利用酶消化法分离培养成年雌性大鼠的成骨细胞；②对培养的成骨细胞及其雌激素受体α进行鉴定；③分别加入浓度为0ng／ml、0．1ng／ml、1ng／ml、10ng／ml的PDGF—BB，共同培养7d，并设阳性对照组和阴性对照组；④Western blotting化学发光法检测ER蛋白质，GIS-2010凝胶图象处理系统分析结果。结果①培养的细胞为成骨细胞，免疫组化显示ERα位于胞核；②SDS-PAGE电泳显示在66kD处有清晰的蛋白条带；③Western blot显示10ng／ml组、1ng／ml组、0．1ng／ml组ER。蛋白条带较0ng／ml组清晰，且10ng／ml组最明显。结论PDGF—BB具有促进成骨细胞雌激素受体α蛋白表达的作用，雌激素受体α蛋白含量随着PDGF—BB浓度的增加而呈增加的趋势。     

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。     

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.     

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.     

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

目的 评价脊髓胶质细胞在小鼠骨癌痛形成中的作用.方法 健康雄性C3H/He小鼠40只,周龄8～10周,体重18～22 g,随机分为4组(n=10):假手术组(S组)、骨癌痛组(B组)、PBS组(P组)和米诺环素组(M组).S组跟骨骨髓腔内注射PBS 10 μl;余3组跟骨骨髓腔内注射含2×105个骨纤维肉瘤细胞的PBS 10 μl制备骨癌痛模型,于造模前即刻开始PBS组鞘内注射PBS 5μl,M组鞘内注射米诺环素(用PBS溶解为0.2 mmol/L)5μl,1次/d,连续11 d.于造模前1 d、造模后即刻、3、5、7、9、11 d时测定机械痛阈;于造模后3、7、9、11 d机械痛阈测定结束后测定冷痛阈.痛阈测定结束后处死小鼠,取脊髓组织,测定神经胶质纤维酸性蛋白(GFAP)和CD11b的表达水平.结果 与S组比较,B组和P组造模后3-11 d时、M组造模后3、5 d时机械痛阈升高,B组、P组和M组造模后7～11 d时冷痛阈升高,脊髓CD11b和GFAP表达上调(P<0.05).与B组比较,M组造模后3-11 d时机械痛阈降低,造模后7-11 d时冷痛阈降低,脊髓CD11b和GFAP表达下调(P<0.05).结论 脊髓胶质细胞(星形胶质细胞和小胶质细胞)的激活参与了小鼠骨癌痛的形成.     

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.