CTLA4-Ig融合蛋白诱导猕猴同种异体肝移植免疫耐受的实验研究

目的探讨细胞毒性T淋巴细胞相关抗原4(CTLA4-Ig)融合蛋白对同种异体肝脏移植免疫耐受的诱导作用及机理。方法利用大型哺乳动物猕猴作为研究对象,建立同种异体原位肝脏移植模型。同种异体原位肝脏移植对照组及CTLA4-Ig组各5只。观察术后生存时间,检测肝功能、IL-2、IL-10、排斥反应的病理学分级和术后肝脏细胞凋亡指数。结果对照组平均存活时间为6.57 d,CTLA4-Ig组平均存活时间为14.92 d(P0.05)。肝功能变化:对照组术后ALT明显升高,Alb则明显降低;CTLA4-Ig组ALT及Alb均维持于正常稳定水平。细胞因子变化:术后3 d起,对照组循环血中IL-2表达水平相对较高,而CTLA4-Ig组IL-10的表达水平较对照组高。移植物病理排斥反应分级:在移植术后CTLA4-Ig组排斥反应程度明显比对照组轻。对照组术后3 d起肝脏细胞凋亡指数较CTLA4-Ig组明显升高。结论CTLA4-Ig融合蛋白可诱导移植后免疫耐受,延长受体生存时间。细胞因子IL-2或者IL-10可作为监测移植排斥反应或者免疫耐受的实验室指标之一。     

CTLA4-Ig基因对大鼠肝移植后免疫细胞浸润及细胞凋亡的影响

目的研究腺病毒介导的细胞毒性T淋巴细胞相关抗原4-Ig(cytolyticT-lymphocyteassociatedantigen4-Ig,CTLA4-Ig)基因对大鼠肝移植后移植物中免疫细胞浸润和细胞凋亡的影响。方法将大鼠原位肝移植模型分为排斥对照组、环孢素A(CsA)组和CTLA4-Ig组。分别于术后1,3,5,7,12d,用免疫组织化学法和缺口末端标记技术(TUNEL法)分别测定移植物中CTLA4-Ig基因的表达和巨噬细胞、CD8 T细胞浸润及细胞凋亡,并以病理形态学变化作参照。结果静脉注射重组CTLA4-Ig基因腺病毒7d后,大鼠肝脏CTLA4-Ig稳定表达,在肝移植60d后仍呈阳性;CTLA4-Ig组汇管区巨噬细胞、CD8 T细胞浸润明显较排斥对照组少;细胞凋亡指数在术后3、5和7d明显低于排斥对照组(P<0·01),汇管区巨噬细胞、CD8 T细胞浸润数和凋亡指数与排斥反应分级均显著相关。结论重组CTLA4-Ig基因腺病毒经静脉一次给药后能在大鼠肝脏稳定表达,并通过抑制移植物中免疫细胞浸润及移植物细胞凋亡,抑制移植后急性排斥反应。     

器官组织移植

异种心脏移植急性血管性排斥反应期组织因子与凝血的关系；大鼠供心转染CTLA4-Ig基因抑制心脏移植后排斥反应；同种异基因大鼠心脏移植急性排斥反应的相关基因分析；多种酶消化法分离培养气管上皮细胞方法的比较；再次肝移植八例报告；8同种原位肝移植术的胆管重建及其术后并发症的防治；原位肝移植肝动脉血栓形成的预防和治疗；“二袖套法”大鼠原位肝移植的技术改进；脂肪肝供肝应用于肝移植的研究进展（综述）；机械分离成人尸体胰腺提高胰岛数量和质量；经门静脉及肠道引流式一期胰肾联合移植六例报告；转化生长因子-β1基因修饰树突状细胞诱导异种胰岛移植耐受；尿转化生长因子β1与移植肾远期功能；肾移植术后巨细胞病毒感染的早期诊断与治疗；肾移植术后患者骨代谢的改变；再次肾移植对尿毒症患者性功能的影响；骨化三醇和氨基胍联合应用减轻大鼠肾移植急性排斥反应。     

CTLA4一Ig与器官移植免疫耐受的诱导

应用CTLA4-Ig或导入CTLA4-Ig基因在动物器官移植中诱导了免疫耐受。其主要作用机制是CTLA4-Ig可以阻断B7：CD28／CTLA4共刺激通路，阻碍第二信号的传递，从而抑制T细胞活化。CTLA4-Ig为诱导器官移植后的免疫耐受提供了新的方法。     

TNF-α和IL-2在肝移植急性排斥反应中的表达及意义

目的 检测肿瘤坏死因子α(TNF-α)和白细胞介素2(IL-2)在肝移植术后急性排斥反应中的表达情况,以评价其作为肝移植术后急性排斥反应早期诊断指标的价值.方法 建立大鼠原位肝移植模型,应用荧光定量PCR法检测大鼠肝移植术后肝组织中TNF-α和IL-2基因的表达,以组织病理学作为急性排斥反应的诊断标准,研究其表达与急性排斥反应的关系.结果 术后3,5,7d异基因肝移植大鼠移植肝均有急性排斥反应发生.其肝组织TNF-α及IL-2表达水平均显著高于同期同基因肝移植大鼠肝组织的TNF-α,IL-2表达水平.结论 TNF-α和IL-2参与肝移植后排斥反应的发生,其表达可作为术后急性排斥反应的辅助诊断指标.     

基因转移CTLA4-Ig和抗CD154抗体在异种胰岛移植排斥反应中的作用

目的 探讨基因转移细胞毒性T细胞相关抗原4免疫球蛋白(CTLA4-Ig)和抗T细胞分化群154(CD154)抗体在异种胰岛移植排斥反应中的作用及机理.方法 建立人-大鼠异种胰岛移植模型,用携带CTLA4-Ig基因的重组腺病毒感染移植胰岛细胞,并用抗CD154抗体进行治疗,观察糖尿病大鼠胰岛移植后血糖变化、生存情况及移植物病理形态学改变,检测移植物CTLA4-Ig、胰岛素的表达和移植大鼠白细胞介素2(IL-2)、肿瘤坏死因子(TNF)-α的水平变化.结果 (1)糖尿病大鼠移植后2 d血糖降至正常,对照组血糖平均在移植后8 d升高,抗体治疗组、转染组和联合治疗组血糖分别在18、25和36 d升高.(2)对照组、抗体治疗组、转染组和联合治疗组的移植物存活时间分别为(10.0±2.1)d、(22.0±8.2)d、(28.0±6.5)d和(37.0±9.3)d,各组间比较差异有统计学意义(P＜0.05);移植大鼠生存时间分别为(21.0±5.7)d、(35.0±6.5)d、(48.0±8.5)d和(65.0 ±12.5)d,各组间比较差异有统计学意义(P＜0.05).(3)对照组在移植后1周内,IL-2、TNF-α的水平均急剧上升,较移植前显著升高(P＜0.01).(4)各治疗组移植物见成片的胰岛细胞团,未见淋巴细胞浸润,转染组和联合治疗组移植物可见CTLA4-Ig和胰岛素的表达.结论 基因转移CTLA4-Ig和抗CD154抗体均可抑制异种胰岛移植排斥反应,二者联合效果优于单独使用.     

供肝局部转染人细胞毒性T淋巴细胞相关抗原4免疫球蛋白的重组腺相关病毒诱导大鼠同种肝移植免疫耐受

目的 利用人细胞毒性T淋巴细胞相关抗原4免疫球蛋白的重组腺相关病毒（rAAV-hCTLA41g）局部基因转染供肝诱导大鼠同种肝移植免疫耐受。方法 供体为DA大鼠，受体为LEW大鼠，分为以下4组：（A）同基因对照组（LEW-LEW）；（B）生理盐水对照组；（C）rAAV-EGFP（增强型绿色荧光蛋白）对照组；（D）rAAV-hCTLA41g灌注组。大鼠原位肝移植前6周，经门静脉灌注采用血管夹闭法对供肝进行基因转染。结果 D组大鼠平均生存期显著高于C组（10．8±1．0）d及B组（11．6±1．1）d，B组与D组间，C组与D组间，生存期差异有统计学意义（P〈0．01）。D组血浆及移植肝中可以持续检测到hCTLA41g的表达。术后1周移植肝病理检查显示B组、C组均有严重免疫排斥反应，免疫组织化学显示大量CD4^＋、CD8^＋T淋巴细胞浸润；而D组仅有轻、中度炎症反应，少量CD4^＋、CD8^＋T淋巴细胞浸润。结论 移植术前6周对供肝体内经门静脉灌注采用血管夹闭技术基因转染rAAV-hCTLA41g可以诱导大鼠同种肝移植免疫耐受。     

CTLA4-Ig基因修饰骨髓间充质干细胞抑制大鼠肝移植排斥反应

目的探讨细胞毒性T淋巴细胞相关抗原4免疫球蛋白(CTLA4-Ig)基因转染骨髓间充质干细胞(MSC)在抑制大鼠原位肝移植排斥反应的作用及机制。方法采用重组腺病毒(Ad)5-CTLA4-Ig转染MSC。转染72 h后,提取细胞总蛋白,采用蛋白质印迹法检测转染后MSC中CTLA4-Ig的蛋白表达。采用细胞计数试剂盒(CCK)-8方法检测未转染和转染后的MSC对外周血淋巴细胞增殖的抑制作用。以雄性Lewis大鼠为供体(40只);以雄性Brown Norway(BN)大鼠为受体(40只)。采用改良的Kamada两袖套法进行原位肝移植,建立大鼠原位肝移植急性排斥反应模型。40只受体大鼠随机分为4组,每组10只。其中对照组(A组),于肝移植时门静脉输注生理盐水;MSC治疗组(B组),于肝移植时门静脉输注MSC;转基因MSC治疗组(C组),于肝移植时门静脉输注转基因MSC;免疫抑制剂治疗组(D组),于肝移植时门静脉输注生理盐水,术后即给予环孢素(CsA)1.5 mg/(kg·d)肌内注射,连续8 d。每组大鼠取5只观察生存情况。每组其余5只于术后第9日处死,检测外周血细胞因子白细胞介素(IL)-2、IL-4、干扰素(IFN)-γ水平,光学显微镜下观察肝组织病理学变化和排斥反应程度。结果重组Ad5-CTLA4-Ig转染MSC 72 h后,蛋白质印迹法可检测到转染后的MSC中有CTLA4-Ig的蛋白表达。当未转染的MSC∶外周血单核细胞比例为1∶10、1∶20时,MSC抑制淋巴细胞增殖的作用分别为85.60%、76.69%。重组Ad5-CTLA4-Ig转染MSC 72 h后,在相同的数量比下,其抑制淋巴细胞增殖的作用分别为90.50%、84.20%;与未转染的MSC比较,转染后抑制淋巴细胞增殖的作用增强(P0.05)。A、B、C、D组大鼠肝移植术后存活时间分别为(13±3),(41±6),(90±15),(102±18)d。A、B、C组的大鼠术后存活时间比较差异有统计学意义(P0.05),C组和D组的大鼠术后存活时间比较差异无统计学意义(P0.05)。与A组比较,B组和C组的IL-4水平明显升高;与B组比较,C组的IL-4水平明显升高,差异均有统计学意义(均为P0.05);C组和D组的IL-4水平比较,差异无统计学意义(P0.05)。与A组比较,B组和C组的IL-2、IFN-γ水平明显降低,C组的IL-2、IFN-γ水平亦低于B组,差异均有统计学意义(均为P0.05),C组和D组的IL-2、IFN-γ水平比较,差异无统计学意义(P0.05)。大鼠肝组织病理检查结果显示,A组移植肝发生重度排斥反应,B组移植肝亦发生排斥反应,但与A组比较程度较轻。C组与D组移植肝有轻度排斥反应。结论重组Ad-CTLA4-Ig转染MSC可抑制肝移植排斥反应,其效果优于MSC单独应用。     

CTLA4-Ig和抗CD40L单克隆抗体抑制大鼠胰腺移植急性排斥反应的机制

目的探讨细胞毒T淋巴细胞相关抗原4免疫球蛋白（CTLA4-Ig）和抗CD40L单克隆抗体对异基因大鼠胰腺移植后急性排斥反应的作用及其相关机制。方法建立大鼠的胰十二指肠移植模型，供者为F344大鼠，受者为经链尿佐菌素诱导为糖尿病模型的Lewis大鼠，受者移植后分为4组，每组12只。A组：为应用生理盐水对照组；B组：应用CTLA4-Ig200μg；C组：应用抗CD40L单克隆抗体200μg；D组：联合应用CTLA4-Ig和抗CD40L单克隆抗体各200μg。各组分别于术后第2d腹腔注射相应的药物。术后1、4、7、10d分别取各组的移植胰腺，进行常规病理检测；采用逆转录聚合酶链（RT-PCR）法检测移植物白细胞介素2（IL-2）、白细胞介素4（IL-4）、白细胞介素10（IL-10）、γ干扰素（IFN-γ）的表达；术后第1、4、7、10d取受者外周血，采用流式细胞术计数T细胞亚群CD3^＋、CD4^＋和CD8^＋；术后第4d取移植胰计数CD4^＋CD25^＋T细胞。结果病理检测显示：与A组相比，B、C组排斥反应明显减弱，D组几乎未发生排斥反应；B、C、D组IL-2的表达高峰延迟，且表达水平较A组有不同程度的降低，D组又较B、C组表达水平下降，差异有统计学意义；B、C、D组IFN-γ的表达水平较A组有不同程度的降低，但D组与B、C组的差异不显著；B、C组IL-4的表达水平较A组有不同程度的升高，D组较A、B、C组表达水平下降，差异有统计学意义；B、C组IL-10的表达水平较A组有不同程度的升高，D组与A组差异不显著；B、C、D组CD3^＋、CD4^＋和CD8^＋T细胞数均相对减少，CD4^＋CD25^＋T细胞数有不同程度升高，与A组比较，D组的差异最为显著。结论联合应用CTLA4-Ig和抗CD40L单克隆抗体能更有效地抑制大鼠胰腺移植后排斥反应，其机制可能与Th1／Th2型细胞因子偏移及CD4^＋CD25^＋调节性T细胞增多等有关。     

热休克蛋白70与大鼠肝移植术后早期急性排斥反应的相关性研究

目的对热休克蛋白70（heat shock protein70,HSP70）与大鼠肝移植术后早期急性排斥反应进行相关性研究．探讨其中的免疫学机制。方法建立改良“二袖套法”大鼠原位肝移植模型,将大鼠分为A组（冷保存1h同基因组）,B组（冷保存18h同基因组）,C组（冷保存1h异基因组）,D组（冷保存18h异基因组）,术后收集大鼠肝脏组织和血清．用免疫组织化学及Western blotting方法检测HSP70在移植肝脏中的表达,观察其与病理学检查的相关性结果冷保存时间的延长可以诱导移植肝组织HSP70的高表达,移植肝HSP70表达水平的升高与大鼠原位肝移植术后早期急性排斥病理学评分之间存在着明显的正相关性（P〈0．05,r=0.928）．结论HSP70的升高可能与大鼠原位肝移植术后急性排斥的早期发生以及大鼠移植术后2周存活率密切相关．     

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.