汉语大全>医学论文>痴呆患者血清和脑脊液中炎前和抗炎细胞因子的变化(一)

痴呆患者血清和脑脊液中炎前和抗炎细胞因子的变化(一)

详细内容

作者:李龙宣,赵斌,许志恩,邢孔鸯,唐荣华

【关键词】 痴呆;白介素1β;白介素6;肿瘤坏死因子α;白介素1受体拮抗剂

  Changes of pro and antiinflammatory cytokines in serum and cerebrospinal fluid of patients with different kinds of dementias

  【Abstract】 AIM: To observe the serum and cerebrospinal fluid (CSF) levels of the proinflammatory cytokines, interleukin1 β (IL1β), interleukin6 (IL6), tumor necrosis factor α (TNFα), and the antiinflammatory cytokine, interleukin1 receptor antagonist (IL1ra) in patients with different kinds of dementias and normal controls and to investigate their clinical meanings. METHODS: A total of 70 cases of patients with different kinds of dementias at the Department of Neurology in our hospital and Peoples Hospital of Taishan City from September 2003 to August 2005 were consecutively selected as the observed subjects, including 30 Alzheimers disease (AD) patients, 15 mixed dementia (MD) patients and 25 vascular dementia (VD) patients. The serum and CSF levels of IL1β, IL6, TNFα and IL1ra in the patients with different kinds of dementias and the controls were measured using ELISA. RESULTS: pared to the controls, the levels of TNFα in CSF in the patients with different kinds of dementias were upregulated, whereas the level of IL1ra was downregulated to some extent (P0.05 or P0.01). The differences between the CSF levels of IL1β but not of IL6 in the patients with AD and those in the controls reached statistical significance (P0.05). In contrast, the patients with VD displayed significantly higher CSF levels of IL6 but not of IL1β pared to the controls (P0.05). The CSF levels of IL1β and IL6 in the patients with MD are both significantly higher than those in the controls (P0.01). However, serum levels of IL1β, IL6, TNFα and IL1ra were not significantly different in the patients with different kinds of dementias in parison with the controls. No correlations were found between CSF and serum levels of the cytokines. CONCLUSION: The changes of pro and antiinflammatory cytokines in the brain might be the factors of the neuropathological damage in AD, VD and MD.

  【Keywords】 dementia; interleukin1β; interleukin6; interleukin1 receptor antagonist; tumor necrosis factor α

  【摘要】 目的:研究炎前和抗炎细胞因子在不同痴呆患者血清和脑脊液中的变化并探讨其临床意义. 方法:200309/200508我院和台山市人民医院神经科就诊的70例老年痴呆患者作为观察对象,其中阿尔茨海默病(AD)30例、混合性痴呆(MD)15例、血管性痴呆(VD)25例. 用夹心式酶联免疫吸附法测定各组老年人血清和脑脊液中白介素1β(IL1β),白介素6(IL6),肿瘤坏死因子α(TNFα)和白介素1受体拮抗剂(IL1ra)的水平. 结果:各痴呆组患者脑脊液中TNFα的水平较正常老年人有不同程度升高,而IL1ra则不同程度降低(P0.05或P0.01);AD组患者脑脊液中IL1β水平高于对照组(P0.05),IL6含量较对照组却无增高;VD组患者脑脊液中IL6水平虽显著高于对照组(P0.05),但IL1β含量与对照组相比无增高; MD组患者IL1β,IL6水平较对照组均有增高(P0.01). 各痴呆组血清中IL1β,IL6,TNFα和IL1ra的水平与正常老年人相比无差异. 相关分析显示不同痴呆患者血清与其相对应的脑脊液中炎前和抗炎细胞因子水平之间无相关. 结论:痴呆患者脑内炎前和抗炎细胞因子的变化可能是其神经病理损害因素.

  【关键词】 痴呆;白介素1β;白介素6;肿瘤坏死因子α;白介素1受体拮抗剂

  0引言

  目前人们普遍公认,炎性细胞因子参与阿尔茨海默病(Alzheimers disease, AD)患者脑内的神经病理损伤过程,并在这方面作了大量的研究工作. 但同时研究处于不同老年期痴呆患者生前脑内炎前和抗炎细胞因子表达的报道罕见. 本文系统研究了不同老年期痴呆患者,包括AD,血管性痴呆(vascular dementia, VD),混合性痴呆(mixed dementia, MD)患者血清与脑脊液(cerebrospinal fluid, CSF)中炎前和抗炎细胞因子的变化,现报道如下.

  1对象和方法

  1.1对象200309/200508我院和台山市人民医院神经科住院患者. 简易精神状态检查量表(MMSE)24分初筛有痴呆纳入观察对象,按照美国精神疾病诊断及统计手册第四版(DSMⅣ)标准诊断痴呆. AD组30例,均符合美国神经病学、语言障碍和卒中阿尔茨海默病和相关疾病学会(NINCDSADRDA)很可能AD的诊断标准,其中男13例,女17例,年龄64.6±7.9(57~76)岁,受教育(6.4±4.0)年,MMSE评分16.2±6.2,Hachinski缺血指数4分;MD组15例,诊断根据有痴呆症状,有脑血管病危险因素,神经局灶体征不明显,MRI示脑内无大的梗死,但有小的腔梗,而且数量在5个以上(肉眼可见),其中男8例,女7例,年龄61.8±8.2(56~74)岁,受教育(6.4±4.0)年,MMSE评分16.8±6.4,Hachinski缺血指数4~7分;VD组25例,均符合美国国立神经病与卒中研究所/瑞士神经科学国际协会(NINDSAIREN)很可能VD的诊断标准,其中男14例,女11例,年龄65.3±8.8(48~75)岁,受教育(6.5±4.1)年,MMSE评分16.6±6.4,Hachinski缺血指数>7分;同时选取20例老年健康志愿者作为对照,无记忆障碍和其他痴呆症状,其中男11例,女9例,年龄61.0±7.6(58~72)岁,受教育(6.5±4.2)年. 各组在性别构成、年龄、受教育年限方面无统计学差异,各痴呆组患者MMSE评分无统计学差异,具有可比性. AD, MD与VD各组患者都有头颅MRI资料,并详细进行神经系统体查以助于鉴别,同时除外引起智能障碍的其他原因.
  
  上述研究对象和对照组均无其他神经系统疾病、免疫系统疾病、系统感染(检查前2 wk无明确感染史)及肝肾功能不全者,且未应用精神抑制药物、非甾体类消炎药、抗氧化剂及免疫抑制治疗. 病例为随机选择,无血缘关系.

  1.2方法清晨空腹采集受检者静脉血5 mL,离心取血清;并于上午9:00~11:00在安静状态下按常规行腰穿取CSF 2~3 mL,经离心(3500 r/min, 15 min)后,取上清,分装,置-70℃保存待测. 血清与脑脊液中炎前细胞因子白介素1β (IL1β),白介素6(IL6),肿瘤坏死因子α (TNFα)和抗炎细胞因子白介素1受体拮抗剂(IL1ra)用夹心式酶联免疫吸附法(ELISA)定量检测,试剂盒购自晶美生物工程有限公司.

  统计学分析:计量数据以x±s表示, 采用SPSS 12.0软件进行方差分析(F检验)和多重比较(q检验)以及直线相关分析.