染料木黄酮通过促进VEGF 表达改善去势大鼠骨质疏松的作用机制

目的观察染料木黄酮(Genistein Gen)通过促进VEGF表达改善去势大鼠骨质疏松的作用机制。方法建立绝经大鼠模型,6月龄雌性大鼠40只,随机分为对照组,假手术组、去势组、Gen干预6周组、Gen干预12周组。光镜下观察各组股骨头结构,分析大鼠股骨头空缺骨陷窝数的变化。ELISA检测血管内皮生长因子(VEGF),观察VEGFmRNA原位杂交表达强度并分析。结果与对照组相比,去势组骨密度值下降,Tb.Th明显下降(P0.05)。干预10周组骨密度值明显升高,Tb.Th明显升高,差异均有统计学意义(P0.05)。糖尿病大鼠股骨头随病程发展骨小梁变稀薄。Gen对去卵巢大鼠血清中VEGF的表达无影响。VEGF mRNA在骨髓腔血管内皮细胞表达上升(P0.05)。结论 Gen可促进血管内皮细胞增殖,促进血管形成,改善去势大鼠骨质疏松抗骨质疏松倾向。     

染料木黄酮对去势大鼠骨组织形态计量学参数的影响

目的　研究染料木黄酮对去势大鼠股骨远端形态计量学参数的影响 ,为染料木黄酮防治骨质疏松提供理论依据。方法　雌性Wistar大鼠 4 7只 ,按体重随机分为 6组 :假手术组、去势对照组、去势 雌激素组 (2 0 μg/kg体重 )、去势 染料木黄酮组 (染料木黄桐剂量分别为 2 5、5 0、10 0mg/kg体重 )。饲养 3个月后处死 ,测定股骨形态计量学参数。结果　去势组与假手术组比较 ,骨小梁体积、平均骨小梁板密度和厚度减少 ,平均骨小梁板间隙和类骨质宽度增加 ,矿化延迟时间和类骨质成熟时间延长 ,且差异均具有显著性 (P <0. 0 5 )。染料木黄酮各组与去势组比较 ,骨小梁体积和平均骨小梁板厚度增加 ,平均骨小梁板间隙变窄 ,矿化延迟时间和类骨质成熟时间缩短 ,且差异均有显著性 (P <0 . 0 5 )。结论　染料木黄酮有促进骨形成 ,减少切除卵巢后骨量丢失的作用。     

雷洛昔芬联合仙灵骨葆对骨质疏松骨微结构和生物力学性能的影响

目的探讨雷洛昔芬联合仙灵骨葆对骨质疏松大鼠骨微结构及其生物力学性能的影响。探讨其调控骨吸收与骨形成及其防治骨质疏松症的作用机制。方法 6月龄40只SD大鼠在骨质疏松造模之后,随机分为正常组、假手术组、模型组、干预1组、干预2组,每组8只。造模手术1周后,干预1组采用经口灌胃雷洛昔芬6.2 mg/(kg·d),干预2组采用经口灌胃雷洛昔芬6.2 mg/(kg·d)+仙灵骨葆250 mg/(kg·d),而正常组、假手术组、模型组采用经口灌胃注射用水。12周后应用组织病理学分析及组织计量学测定;利用Van Gieson胶原纤维染色法观察胶原纤维沉积变化;ELISA测定血清蛋白聚糖活性。分离右侧股骨进行三点弯曲试验,检测股骨生物力学性能。结果对照组骨小梁粗厚、有完整的成骨细胞区。模型组骨小梁稀疏细薄、细胞核固缩;与对照组相比,模型组胶原纤维明显减少,蛋白聚糖含量明显增加,最大载荷(FM)下降,差异均有统计学意义(均P0.05)。干预组骨小梁排列较紧密。干预2组较干预1组,胶原纤维明显增加,蛋白聚糖活性降低,最大载荷(FM)差异具有统计学意义(P0.01)。结论雷洛昔芬联合仙灵骨葆较雷洛昔芬单独用药可以显著改善骨质疏松大鼠的骨基质代谢,促进成骨,显著加强骨生物力学性能。     

外源性CGRP诱导糖尿病大鼠膜性成骨的实验研究

目的探讨外源性降钙素基因相关肽(calcitonin gene related peptide,CGRP)对糖尿病大鼠骨膜微血管病变和膜性成骨的影响。方法建立糖尿病大鼠模型,外源性CGRP静脉注射,随机分为对照组(CON)、糖尿病组(DM)、CGRP干预组(CGRP),分别在5w、10w后观察各组大鼠骨膜微组织结构及组织计量学测定;墨汁灌注观测骨膜微血管单位面积。结果DM1骨祖细胞数较CON均增大(P0.01),DM2骨膜厚度等均明显小于CON组(P0.01);微血管单位面积增大,但渗透性大。CGRP骨膜厚度较DM1增多(P0.01)。CGRP2较DM2骨膜厚度、骨祖细胞数均增大(P0.01),微血管连续性好。结论外源性CGRP可改善糖尿病大鼠骨膜的微循环损伤,促进膜性成骨对糖尿病大鼠骨质疏松症起到修复作用。     

糖尿病合并去势大鼠骨微结构退化的研究

目的探讨糖尿病合并去势大鼠骨微结构的改变。方法 6月龄雌性大鼠40只,随机分为对照组、假手术组、去势组、糖尿病组和糖尿病合并去势组。6 w和15 w后应用Micro-CT测定股骨检测骨密度和骨微结构;利用Van Gieson胶原纤维染色法观察胶原纤维沉积变化;HE染色分析大鼠股骨头骨小梁厚度(Tb.Th)和骨小梁间距(Tb.Sp)变化。结果与对照组相比,去势6 w和15 w组骨β-胶原降解产物水平和Tb.Sp明显升高,骨密度值和Tb.Th明显下降。去势15 w组骨胶原纤维明显下降,差异有统计学意义(P0.05)。糖尿病组15 w松质骨β-胶原降解产物水平、胶原纤维和Tb.SP明显升高,骨密度值、胶原纤维和Tb.Th明显下降,差异有统计学意义(P0.05)。糖尿病合并去势组6 w和15 w组松质骨β-胶原降解产物水平、胶原纤维和Tb.Sp明显升高,骨密度值和Tb.Th明显下降,差异有统计学意义(P0.05)。结论糖尿病合并去势早期是以去势为主导致的骨质疏松,后期则由糖尿病缓慢的骨分解加持,骨质疏松继续加重。     

金雀异黄素对糖尿病大鼠肾皮质SMemb表达及细胞外基质的作用

目的探讨金雀异黄素(Gen,5,7,4’-三羟异黄酮,又称染料木黄酮)对糖尿病 (DM)大鼠肾组织系膜细胞(MC)表型和细胞外基质的作用。方法雄性SD大鼠45只,分为(1) 正常对照组:10只,普通鼠饲料自由饮食;(2)DM组:再分为4周组9只,8周组8只,普通鼠饲料自由饮食;(3)DM+Gen灌胃组:同样再分为4周组10只,8周组8只,普通鼠饲料自由饮食及 Gen 30 mg．kg-1·d-1。于实验4周、8周末禁食12 h,检测空腹血糖(FBG)、BUN、Scr,肾组织非肌肉型肌球蛋白重链(SMemb)mRNA表达、纤连蛋白(Fn)／肾重及基质金属蛋白酶(MMP)-2／组织基质金属蛋白酶抑制剂(TIMP)-I沉积结果。结果 DM大鼠FBG、BUN、Scr、Fn／肾重均高于正常对照组,以8周时最为显著(P<0．01);MMP-2／TIMP-1免疫组化半定量比值显著降低(P< O．01);SMemb mRNA／GAPDH mRNA半定量比值高于正常对照组,于4周达高峰,8周时下降 (0．794±0．037比0．708±0．029)。Gen干预后与同期DM组相比,肾功能部分恢复,SMemb mRNA／ GAPDH mRNA比值明显缩小(P<0．01);Fn／肾重也显著低于DM组(P<0．01);MMP-2／TIMP-1 比值与同期DM组相比也有显著增加(分别P<0．01或<0．05)。结论金雀异黄素可以减轻链脲佐菌素所诱导DM大鼠的肾皮质SMemb的表达,提高MMP-2／TIMP-1比值,改善糖尿病模型大鼠肾功能,可能有延缓糖尿病肾病(DN)进展的作用。     

激素性股骨头缺血坏死发病机制的实验研究

目的　探讨股骨头缺血坏死的发病机制 ,以冀正确指导临床。方法　 2 4只日本大耳白兔随机分为模型组和对照组。给模型组动物大剂量肌注醋酸泼尼松龙 (8mg/kg) 8周 ,造成股骨头缺血坏死模型。造模开始后第 4周、8周、12周两组动物各取 2只进行光镜和扫描电镜观察 ,并在两组动物中各取 4只测定晨空腹血中一氧化氮、组织型纤溶酶原激活物、纤溶酶原激活物抑制物的含量。结果　与对照组相比 ,模型组股骨头骨质疏松 ,光镜下空骨陷窝数增多 ,脂肪细胞数增多 ,扫描电镜下骨小梁断裂塌陷 ,骨基质表面胶原纤维松解、断裂。模型组动物与对照组相比血浆中一氧化氮、组织型纤溶酶原激活物含量下降 (P <0 0 1) ,纤溶酶原激活物抑制物的含量升高 (P <0 0 1)。结论　激素性股骨头缺血坏死可能与一氧化氮含量及纤溶系统的活性下降有关。     

舒洛地特对糖尿病大鼠肾脏病变的保护作用与机制探讨

目的 观察舒洛地特对糖尿病大鼠肾脏组织核因子NF-κB活性及单核细胞趋化蛋白1(MCP-1)表达的影响,探讨舒洛地特对糖尿病肾病的保护机制.方法 高脂高糖喂养联合小剂量链脲佐菌素腹腔注射建立Wistar大鼠糖尿病模型,并按随机数字表法分为非治疗组(DM)及舒洛地特治疗组( DMS).非糖尿病大鼠作为正常对照组(NC).12周后杀检,测定血糖、血肌酐、尿素氮、三酰甘油、胆固醇;免疫比浊法测定24h尿白蛋白;光镜下观察肾小球形态和结构,计算平均肾小球体积;免疫组化法检测肾组织MCP-1表达;Western印迹方法测定NF-κB活性.结果 与NC组比较,DM组及DMS组血糖、三酰甘油、胆固醇均显著升高(均P＜ 0.01);DMS组与DM组比较,以上指标差异无统计学意义.与NC组相比,DM组及DMS组血肌酐、尿素氮、24 h尿白蛋白显著升高(均P＜0.01).与DM组比较,DMS组血肌酐[(39.1±0.88) μmol/L比(41.0±2.16) μmol/L,P＜0.05]、尿素氮[(9.12±1.06) mmol/L比(9.87±0.19) mmol/L,P＜0.05]、24h尿白蛋白[(19.92±0.96) mg/24 h比(25.99±0.52) mg/24 h,P＜ 0.01]均显著降低.与NC组比较,DM组平均肾小球体积显著增加[(7.47±1.11)×105 μm3比(4.22±1.09)×105μm3,P＜ 0.01];DMS组平均肾小球体积[(6.64±0.71 )×105 μm3,P＜0.05]较DM显著降低,但仍显著高于对照组(P＜0.01).与NC组相比,DM组肾组织MCP-1表达显著升高[( 12.17±1.94 )/HPF比(1.19±0.70)/HPF,P＜0.01];与DM组比较,DMS组肾组织MCP-1表达[(9.22±1.61 )/HPF,P＜0.01]显著降低,但仍高于NC组(P＜0.01).与NC组相比,DM组肾组织NF-κB活性显著升高[(0.89±0.07)比(0.24±0.03),P＜0.01];与DM比较,DMS组肾组织NF-κB活性[(0.27±0.01),P＜0.01]显著降低,与NC组比较,差异无统计学意义.结论 舒洛地特对糖尿病肾病具有防治作用,抑制NF-κB活性及MCP-1表达可能是其作用机制之一.     

染料木黄酮诱导前列腺癌DU-145细胞凋亡的研究

【摘要】〓目的〓探讨染料木黄酮诱导前列腺癌细胞系DU-145细胞凋亡的作用。方法〓在Caspase抑制剂Z-VAD存在或不存在的情况下,以染料木黄酮作用于前列腺癌DU-145细胞,采用MTT法检测细胞存活率、Annexin V-FITC/PI双染法流式细胞术检测细胞凋亡、PI染色法流式细胞术检测细胞周期、JC-1染色法流式细胞术测定细胞线粒体膜电位(△ψm),比色检测试剂盒测定caspase-8活性。结果〓染料木黄酮能明显降低前列腺癌DU-145细胞的存活率、诱导癌细胞凋亡、降低△ψm及提高caspase-8活性(全部P<0.05)。Z-VAD能够逆转Gen抗前列腺癌的效应。结论〓染料木黄酮使细胞阻滞于G0和G1,分别通过凋亡信号通路的外源性和内源性途径,诱导前列腺癌细胞凋亡。     

七氟醚介导腺苷A3受体通路减轻大鼠机械通气肺损伤

目的探讨腺苷A3受体(A_3AR)在七氟醚减轻大鼠机械通气肺损伤(VILI)中的作用及其机制。方法 SPF级健康雄性成年大鼠40只,体重200~250g,随机分为五组:假通气组(Sham组),模型对照组(CON组),七氟醚处理组(SEV组),七氟醚联合A_3AR抑制剂处理组(SM组),A_3AR抑制剂处理组(MRS组),每组8只。除Sham组不进行通气外,其他四组均在麻醉气管插管后行机械通气(V_T 12ml/kg),持续正压通气6h,建立大鼠VILI模型。Sham组:氯胺酮麻醉后直接处死;CON组:氯胺酮维持麻醉状态;SEV组:2%七氟醚维持麻醉;SM组:机械通气开始前30min腹腔注射MRS-1191 1mg/kg,2%七氟醚维持麻醉;MRS组:机械通气开始前30min腹腔注射MRS-1191 1mg/kg,氯胺酮维持麻醉。实验结束后处死大鼠,收集支气管肺泡灌洗液(BALF)和肺组织标本。采用Western blot法检测肺组织A_3AR、gp91~(phox)蛋白含量。检测BALF中炎性因子TNF-α、IL-1β浓度。DHE染色荧光检测肺组织活性氧(ROS)活性。观察肺组织病理学变化,并进行肺损伤评分。结果与SEV组比较,CON组、SM组和MRS组TNF-α、IL-β浓度明显升高(P0.05);与SM组比较,CON组与MRS组TNF-α、IL-β浓度明显升高(P0.05)。与Sham组比较,CON组、SEV组、SM组和MRS组A_3R、gp91~(phox)蛋白含量明显升高,CON组、SM组和MRS组ROS活性明显增强,肺损伤评分明显升高(P0.05);与CON组比较,SEV组和SM组A_3AR蛋白含量明显升高,SEV组gp91~(phox)蛋白含量、ROS活性和肺损伤评分明显降低(P0.05);与SEV组比较,SM组A_3AR蛋白含量明显降低,gp91~(phox)蛋白含量明显升高,SM组和MRS组ROS活性明显增强,肺损伤评分明显升高(P0.05)。结论七氟醚可以减轻机械通气诱发的肺损伤,其作用机制是通过A_3AR抑制肺脏氧化应激和炎症反应起效的。     

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

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.     

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。