浓烟吸入诱发大鼠透明质酸升高的研究

目的　探讨大鼠烟雾吸入后透明质酸增多与大鼠肺吸入性损伤的关系。方法　４０ 只ＳＤ 大鼠随机分成５ 组：正常对照组和烟雾吸入后不同时间观察组。分别测定血清、支气管肺泡灌洗液和肺组织中的透明质酸含量,支气管肺泡灌洗液中的炎性细胞比例及蛋白含量。结果　烟雾吸入后,血清和肺组织中的透明质酸含量升高,１２ ｈ 达到高峰［ 血清：１２ ｈ 组（４７０．４±９７ ．５） μｇ／Ｌ,对照组（１８６．４ ±３１．５） μｇ／Ｌ;肺组织：１２ ｈ 组（６９７ ．５±１１５．１）μｇ／Ｌ,对照组（２０２ ．６ ±３９．４） μｇ／Ｌ］ 。而支气管肺泡灌洗液的各时间观察组升高不显著。支气管肺泡灌洗液蛋白含量６ ｈ 达高峰;细胞数在１２ ｈ 最多,主要是中性粒细胞。结论　烟雾吸入后支气管内炎性细胞以中性粒细胞为主。肺内透明质酸含量高于血液。透明质酸似可作为烟雾吸入性肺损伤的病理指征。     

人骨肉瘤浸润淋巴细胞和引流淋巴结细胞体外抗瘤活性

从１２例骨肉瘤患者手术切除的实体瘤中分离肿瘤浸润淋巴细胞（ＴＩＬ），从患者引流淋巴结中分离淋巴细胞（ＬＮＬ），以ｒＩｌ—２激活培养，并以４小时５１Ｃｒ释放试验测定ＴＩＬ和ＬＮＬ体外抗瘤活性。结果表明：１２例骨肉瘤患者的ＴＩＬ培养１５～２５天，对Ｋ５６２和ＬｉＢｒ靶细胞（效靶比２５∶１）平均杀伤活性分别为５９．７±１２．６％和４４．２±１０．２％，激活的ＬＮＬ对Ｋ５６２和ＬｉＢｒ细胞的杀伤活性分别为５５．２±１１．６％和４０．８±９．１％，二者对Ｋ５６２和ＬｉＢｒ细胞杀伤活性相差不显著（Ｐ＞０．０５）。其中６例患者ＴＩＬ和ＬＮＬ对自身肿瘤细胞杀伤活性分别为３８．８±９．５％和３５．５±７．６％，二者相差不显著（Ｐ＞０．０５）。     

缺血再灌注后脑细胞凋亡率的测定

目的：观察大鼠局灶性脑缺血再灌注后脑细胞凋亡率的时程变化。方法：插线法制备大 鼠大脑中动脉梗塞再灌注（ＭＣＡＯ／Ｒ）模型,用流式细胞仪检测缺血２ｈ再灌注６ｈ、１２ｈ、２４ｈ、４８ｈ、７２ｈ 的凋亡率。结果：缺血再灌注４８ｈ内,随再灌注时间的增加,脑细胞凋亡率逐渐升高,以再灌注４８ｈ凋 亡率最高（１３．１０％± １．３７％）,明显高于再灌注６ｈ（３．３８％±０．７６％）, １２ｈ（６．９８％± １．６３％）,与再灌 注 ２４ｈ（１１,６８％±１.４４％）无明显差别;灌注 ７２ｈ（１０．２０％±２．３０％）明显降低。结论：ＭＣＡＯ２ｈ再灌 注后,脑细胞凋亡的出现是一个动态过程,初期升高,２４ｈ～４８ｈ达到高峰,然后缓慢下降。     

21例高血压病24小时静态血压心率监测分析

２１例未治高血压病用自动袖带血压和心率监测系统监测２４小时静态血压、心率结果示：夜间（２０：００～５：００）血压自２３：００开始缓慢下降，１：３０至２：３０最低；３：００开始骤然升高至接近昼间水平。心率随血压稍有起伏。昼间（６：００～２１：００）血压表现为午前（６：００～１１：００）、午后（１２：００～２１：００）几乎相等的均衡型，占４７．６％；午前血压显著高于午后血压（＞１．３ｋｐａ）的午前型，占３８．１％及与比相反的午后型，占１４．３％。心率变化较大，与血压变化不全平行。昼间血压显著高于夜间血压，分别为２１．６ｌ１３．３±１．８／１．５ｋｐａ和２０．１／１２．５±０．５／０．４ｋＰａ（Ｐ＜０．０１），心率亦然，分别为７４±９次／ｍｉｎ和６６±２次／ｍｉｎ（Ｐ＜０．０１）。昼夜收缩压、舒张压和心率变化率分别为７．５％、６．４％和１２％。     

肺泡Ⅱ型细胞的分离培养及年龄对其增殖的作用

目的：建立肺泡Ⅱ型细胞的分离培养方法，研究年龄对其增殖的影响。方法：应用梯度离心和贴壁培养分离大鼠肺泡Ⅱ型细胞，比较幼年、中年和老年大鼠培养肺泡Ⅱ型细胞的增殖能力。结果：证明该分离方法最终每只鼠可收获（１．１±０．６）×１０７个细胞，细胞活力９４．１％，肺泡Ⅱ型细胞纯度为（９１．６±２．４）％。肺泡Ⅱ型细胞的增殖能力均呈现幼年组＞中年组＞老年组的变化。结论：成功地建立肺泡Ⅱ型细胞的分离培养方法。老年大鼠肺泡Ⅱ型细胞增殖能力下降。     

肺泡Ⅱ型细胞的分离培养及年龄对其增殖的作用

目的：建立肺泡Ⅱ型细胞的分离培养方法，研究年龄对其增殖的影响。方法：应用梯度离心和贴壁培养分离大鼠肺泡Ⅱ型细胞，比较幼年，中年和老年大鼠培养肺泡Ⅱ型细胞的增殖能力，结果：证明该分离方法最终每只可收获（１．１±０．６）×１０＾７个细胞，细胞活力９４．１％，肺泡Ⅱ型细胞纯度为（９１．６±２．４）％，肺泡Ⅱ型细胞的增殖能力均呈现幼年线〉中年组〉老年组的变化。结论：成功地建立肺泡Ⅱ型细胞的分离培养方法，老     

幽门螺杆菌感染对胃癌癌前病变细胞凋亡的影响

目的探讨幽门螺杆菌（Ｈｐ）感染对胃癌癌前病变细胞凋亡的影响。方法采用原位切口末端标记方法检测细胞凋亡，平均每１００个细胞内的阳性细胞数为凋亡指数（ＡＩ）。结果肠化生和异型增生粘膜的ＡＩ分别为３．４±０．９％和１．４±０．７％，明显低于慢性胃炎（６．０±１．８％）（Ｐ值均小于０．０１）；Ｈｐ阳性肠化生和异型增生的ＡＩ分别为３．７±１．１％和１．５±０．７％，与Ｈｐ阴性肠化生（３．１±０．７％）和异型增生（１．３±０．４％）相比差异无显著性（Ｐ值均大于０．０５）。结论胃癌癌前病变粘膜细胞存在凋亡抑制，尽管Ｈｐ感染可诱导胃上皮细胞凋亡，但可能对肠化生和异型增生的细胞凋亡无影响。     

石楠藤提取物对急性出血坏死性胰腺炎大鼠治疗作用的实验研究

作者报道中药石楠藤提取物对急性出血坏死性胰腺炎（ＡＨＮＰ）大鼠治疗作用的实验研究。将１００只ＳＤ大鼠随机分为三组：①假手术组（ＳＯ组）；②ＡＨＮＰ组（ＡＰ组），该组动物在ＡＨＮＰ诱发后，不做特殊治疗；③石楠藤提取物治疗组（ＳＮ组）。该组动物在ＡＨＮＰ诱发后１０分钟经腹腔内注射石楠藤提取物（１％石楠藤提取物５ｍｌ／ｋｇ体重）。结果表明：ＳＮ组血清淀粉酶值明显下降（ＳＮ组１６１３０±５０３０Ｕ／Ｌ６ｈ、１９２９０±５３８０Ｕ／Ｌ１２ｈｖｓＡＰ组２３７８０±３９６０Ｕ／Ｌ、２８４７０±４１５０Ｕ／Ｌ，Ｐ＜０．０１）。血中ＰＡＦ含量明显降低（ＳＮ组１．３±０．３０ｎｇ／ｍｌ１ｈ、２．０±０．３４ｎｇ／ｍｌ６ｈ、２．１±０．３２ｎｇ／ｍｌ１２ｈｖｓＡＰ组２．２±０．２５ｎｇ／ｍｌ、６．１±０．４２ｎｇ／ｍｌ、１０．１±０．５３ｎｇ／ｍｌ，ｐ＜０．０１）。血浆内毒素含量明显下降（ＳＮ组６９．９±７．２ＥＵ／Ｌ、６ｈ、９１．１±８．４ＥＵ／Ｌ、１２ｈｖｓＡＰ组９８．４±６．９ＥＵ／Ｌ、１５１．７±９．１ＥＵ／Ｌ，Ｐ＜０．０１）。石楠藤提取物治疗组术后平均存活时间明显长于ＡＰ组（ＳＮ组：４３．５ｈ，ＡＰ组１１．５ｈ，ｐ＜０     

流式细胞仪法检测4HPR诱导Hela细胞凋亡的百分率

目的：实验结果表明４ＨＰＲ抑制Ｈｅｌａ细胞生长的机理之一是诱导该细胞凋亡。本文用流式细胞仪检测不同浓度的４ＨＰＲ作用不同时间Ｈｅｌａ细胞凋亡的百分比及细胞周期变化。方法：体外细胞培养及流式细胞仪检测法。结果：２μｇ／ｍ的４ＨＰＲ作用２４、４８、７２ｈ后，Ｈｅｌａ细胞的凋亡百分比分别为４．１％、６．６％、２６％；４μｇ／ｍｌ的４ＨＰＲ分别为５．１％、８．３％、２８％、８ｕｇ／ｍｌ的４ＨＲ分别为５．０     

雌激素对乳腺癌细胞的生长及p185蛋白和表皮生长因子受体表达的影响

为了研究乳腺癌的发展过程中雌二醇（Ｅ＿２）的作用机制及参与因素，作者使用流式细胞仪观察了人乳腺癌细胞株ＳＫ－ＢＲ－３在Ｅ＿２作用下的生长特征及ｐ１８５蛋白和表皮生长因子（ＥＧＦ）受体的表达．结果表明，乳腺癌细胞生长加快，ＤＮＡ合成增加，Ｓ期百分率升高（Ｅ＿２组２６．７±２．５，对照组２１．２±２．１，Ｐ＜０．０５）．在Ｅ＿２的作用下，乳腺癌细胞的ｐ１８５蛋白表达降低（Ｅ＿２３５±５．６，对照组６１±１３．１，Ｐ＜０．０５）而ＥＧＦ受体表达升高（Ｅ＿２３９±６．９，对照组２１±５．４，Ｐ＜０．０５），提示ＥＧＦ在乳腺癌的早期发展中可能发挥更主要的作用．     

Carcinoma of the lung and cigarette smoking. Effect on serum ribonuclease activity.

Serum ribonuclease levels were determined in 54 patients with lung carcinoma, 74 long-term cigarette smokers, and 172 nonsmokers. The mean serum ribonuclease level was significantly higher in patients with lung carcinoma and long-term smokers compared with healthy nonsmokers (P less than .001). The serum ribonuclease activity level was not related to chronological age, sex, or race of the smoker or nonsmoker population. Forty (75%) of 53 patients with lung cancer and 49 (66%) of 74 smokers had elevated serum ribonuclease levels compared with 13 (7%) of 179 nonsmoker healthy controls (P less than .001). The highest incidence of elevation was noted in patients with epidermoid carcinoma (95%).     

肺癌患者与吸烟及非吸烟者支气管肺泡灌洗液T淋巴细胞...

The measurements of T-lymphocyte subsets (as expressed by, CD3 CD4 and CD8) in the peripheral blood and bronchial alveolar lavage fluid (BALF) on 30 cases of lung cancer, 26 cases of smoker and 25 cases of nonsmoker have been done. The results showed that there existed no differences in the peripheral blood of the above said subsets of lymphocyte. In BALF the percentage of CD3 in all the lymphocytes did not show any significant difference among the three tested groups, either (P > 0.05). But the percentage of CD4 and the ratio of CD4/CD8 manifested the following peculiarity: patients with lung cancers < smokers < nonsmokers (P < 0.01). On the contrary, the percentage of CD8 showed just the opposite: patients with lung cancer > smokers nonsmokers (P < 0.01). It was suggested that the cellular immunity as shown in the peripheral blood did not correspond with the findings in the BALF. The cellular immunity of the lungs was decreased both in patients with lung cancer and smokers, but more severely in the group of lung cancer patients. Smokers who have had changes of above said subsets of lymphocytes in the lungs may develop lung cancer. As the lung cancer advances, it may suppress body immunity and in turn enhance the cancer growth. Both the cause and the effect are interrelated. Therefore, the provocative agents for cellular immunity may act as one of the adjunctive therapies for patients with lung cancer. Giving up smoking should play an important role in recovering or promoting the immunity of the lungs and decreasing the incidence as well as improving the prognosis in patients with lung cancer.     

尼古丁对小鼠巨噬细胞凋亡的影响

目的：研究尼古丁对小鼠巨噬细胞（Ｍψ）凋亡的影响。方法：用不同浓度（１０＾－８￣１０＾－２ｍｏｌ／Ｌ）的尼古丁与小鼠腹腔Ｍψ体外共同培养,测定Ｍψ存活率;采用荧光和流式细胞术观察Ｍψ凋亡的发生情况。结果：一定浓度（１０＾－４￣１０＾－８ｍｏｌ／Ｌ）的尼古丁对Ｍψ凋亡具有抑制作用。结论：尼古丁可能通过抑制Ｍψ凋亡在肺气肿的发病中起重要作用。     

新疆维吾尔族和哈萨克族男性吸烟与代谢综合征的相关性

目的 探讨新疆维吾尔族和哈萨克族男性吸烟与代谢综合征(MS)的相关性.方法 2007年10月至2010年3月应用四阶段整群随机抽样法,在新疆抽取乌鲁木齐市、克拉玛依市、阜康市、吐鲁番地区、和田地区、伊犁哈萨克自治州等6个地区年龄在35岁以上的维吾尔族和哈萨克族男性人群作为样本.探讨两个民族男性人群吸烟与MS及各组分的相关性.结果 共调查维吾尔族和哈萨克族人群4019人,维吾尔族吸烟869人,哈萨克族1114人,两民族吸烟组MS患病率分别为24.74%和29.62%,非吸烟组MS患病率分别为16.75%,24.72%,差异有统计学意义(P＜0.05);进行同民族间基线资料比较发现在维吾尔族吸烟组中,收缩压、舒张压、腰围、血糖和甘油三酯均高于非吸烟组,而高密度脂蛋白小于非吸烟组,其中舒张压、腰围、甘油三酯在两组中比较差异有统计学意义(P＜0.05);在哈萨克族中吸烟组腰围、甘油三酯、收缩压和舒张压水平高于非吸烟组,但血糖和高密度脂蛋白在吸烟组中的水平均低于非吸烟组,其中收缩压、舒张压和腰围在两组间的比较差异有统计学意义(P＜0.01).通过Logistic多因素回归分析发现,在维吾尔族和哈萨克族MS中,吸烟OR值分别为1.698(95%CI 1.129～2.553)和1.845(95%CI 1.544～2.206),且P＜0.05.结论 新疆维吾尔族和哈萨克族男性吸烟人群中MS患病率较高,吸烟可能为维吾尔族及哈萨克族MS患病的危险因素之一.

Abstract：

Objective To investigate the prevalence and risk factors of smoking and metabolic syndrome (MS) among male Uygur and Kazakh adults residing in Xinjiang.Methods Four-stage selected random sampling was used to analyze the prevalence and the relationship between the risk factors of smoking and metabolic syndrome.The sampled adult populations over 35 years old were collected 6 localities (Urumqi,Kelamayi,Fukang,Turfan Basin locality,Hetian locality & Yili Kazakh Autonomous Prefecture) in Xinjiang,China.The subjects were 4019 males of Uygur and Kazakh.Each individual answered a questionnaire,received physical examinations and a biochemical indicator survey.The smoking patients were divided into two groups: one complicated with metabolic syndrome and the other not.A logistic regression analysis was also made to identify the possible risk factors and their powers on the prevalence of metabolic syndrome with smoking.Results With regards to the habit of smoking,the smokers of Uygur and Kazakh were 869 and 1114 respectively.The prevalence of MS was 24.74% and 29.62% for Uygur and Kazakh smokers respectively.And 16.75% and 24.72% for Uygur and Kazakh non-smokers respectively.The comparison of baseline information showed that,in Uygur males,the mean values of diastolic blood pressure,waist circumference and triglyceride were higher in smoker group than those in non-smoker group ( P ＜ 0.05 ); in Kazakh males,the mean values of systolic blood pressure,diastolic blood pressure and waist circumference were higher than nonsmoker group ( P ＜ 0.05 ).Logistic regression analysis showed that the OR value of smoking was 1.698 (95% CI 1.129 -2.553) in Uygur and 1.845(95% CI 1.544 -2.206)in Kazakh of MS patients.Conclusion The prevalence of MS is higher in male smokers than that in nonsmokers in Uygur and Kazakh.Perhaps smoking is one of the risk factors for MS.     

肺癌患者与吸烟及非吸烟者支气管肺泡灌洗液T淋巴细胞亚群的比较

作者对30例肺癌患者,26例吸烟者及25例非吸烟者的外周血和支气管肺泡灌洗液(BALF)中的T淋巴细胞亚群(T-LS)进行了测定.结果显示:外周血T-LS变化不大;BALF中CD_3％三组间无明显差异,但CD_4％、CD_4/CD_3比值肺癌患者<吸烟者<非吸烟者,而CD_3％则肺癌患者>吸烟者>非吸烟者.提示肺癌患者与吸烟者肺局部细胞免疫功能均有减退,其程度以肺癌患者为重。吸烟所致的肺局部T-LS的改变可诱发肺癌,而肺癌发展过程中又可加重免疫抑制,促进肿瘤生长,两者互为因果。     

吸莫合烟对金黄色地鼠巨噬细胞功能的影响

目的：研究吸莫合烟对金黄色地鼠巨噬细胞吞噬功能的影响。方法：巨噬细胞吞噬试验法。结果：巨噬细胞吞噬率和吞噬指数，吸烟组明显低于对照组（非吸烟组）（Ｐ＜０．０５）。另外测定了免疫器官的重量，结果吸烟组脾和胸腺的重量及胸腺指数、脾指数均低于对照组（Ｐ＜０．０００５）。结论：提示吸莫合烟对金黄色地鼠免疫功能有抑制作用     

慢性阻塞性肺疾病患者和吸烟者CD14+单核细胞Toll样受体的表达及意义

目的 探讨稳定期慢性阻塞性肺疾病(COPD)患者和肺功能正常的吸烟者外周血CD14+单核细胞Toll样受体(TLR)表达的变化及意义.方法 选择COPD稳定期患者30例(COPD组)、健康吸烟者21例(吸烟组)及健康不吸烟者25例(不吸烟组),用肺功能仪测定第一秒用力呼气容积(FEV1)占预计值的百分比(FEV1占预计值%)和FEV1/用力肺活量(FVC);应用流式细胞仪全血双色免疫荧光直标法检测外周血CD14+单核细胞的TLR2、TLR4表达水平,结果 以CD14+细胞TLR相对平均荧光强度(rmfi)和TLR相对阳性细胞百分率(rpcp)表示,并进行TLR2、TLR4表达与肺功能指标相关性分析.结果 COPD组CD14+单核细胞TLR2表达的rmfi(6.3±1.4)和rpcp(52.9%±20.5%)均明显低于吸烟组(分别为8.2±2.2和73.5%±19.O%,均P<0.01)和不吸烟组(分别为11.0±2.4和82.8%±17.9%,均P<0.01);TLR4表达的nnfi(2.2±0.9)明显低于不吸烟者组(3.0±0.5,P<0.01),与吸烟组(2.5±0.6)差异无统计学意义(P>0.05),而rpcp(M=1.3%,Q1～Q3为0.7%～2.4%)则明显低于吸烟组(M=4.7%,Q1～Q3为2.7%～9.4%,P<0.01)和不吸烟组(M:5.3%,Q1～Q3为2.6%～8.4%,P<0.01).吸烟组CD14+单核细胞中TLR2、TLR4表达的rmfi均明显低于不吸烟组(P<0.01,P<0.05);而rpcp与不吸烟组差异无统计学意义(P0.05).CD14+单核细胞TLR2和TLR4的表达与FEV1占预计值%、FEV1/FVC呈显著正相关(均P<0.01).结论 稳定期COPD患者和吸烟者外周血CD14+单核细胞TLR2及TLR4表达显著下调,固有免疫可能受到抑制,TLR表达下调与肺功能下降有关.     

Changes of Protein Kinase Cα and Cyclin D1 Expressions in Pulmonary Arteries from Smokers with and without Chronic Obstructive Pulmonary Disease

The purpose of this study was to investigate the changes of protein kinase Ca （PKCα） and cyclin D1 expressions in pulmonary arteries from＇smokers with normal lung function and smokers with mild to moderate chronic obstructive pulmonary disease （COPD）. The peripheral lung tissues were obtained from 10 non-smokers with normal lung function （non-smoker group）, 14 smokers with normal lung function （smoker group）, 11 smokers with mild to moderate COPD （COPD group）. The morphological changes of pulmonary arteries were observed by HE-staining. The expressions of ct-smooth muscle actin （α-SMA）, proliferating cell nuclear antigen （PCNA）, PKCα and cyclin D1 proteins in pulmonary artery smooth muscle cells （PASMCs） were immunohistochemically determined. The percentages of PCNA-positive cells were taken as the smooth muscle cells proliferation index （PI）. The mRNA expressions of PKCα and cyclin D l in PASMCs were evaluated by real-time fluorescence PCR. Morphometrical analysis showed that the ratio of pulmonary artery wall area to total area （WA%） in smoker group and COPD group was significantly greater than that in non-smoker group （P〈0.01）. The PASMCs proliferation index in smoker group and COPD group was significantly higher than that in nonsmoker group （P〈0.01）. The protein levels of PKCct and cyclin D1 inPASMCs were significantly increased in smoker group and COPD group as compared with non-smoker group （P〈0.01）. The mRNA expressions of PKCα and cyclin D1 in PASMCs were significantly elevated in smoker group and COPD group as compared with non-smoker group （P〈0.01）. Significant correlations were found between PKCα protein and WA% or PI （P〈0.01）. Correlations between cyclin D1 protein and WA% or PI also existed （P〈0.01）. The expression of PKCa was positively correlated with the expression of cyclin D 1 at both protein and mRNA levels （P〈0.01）. In conclusion, increased expressions of PKCα and cyclin D1 might be involved in the pathogenesis of abnormal proliferation of PASMCs in smokers with normal lung function and smokers with mild to moderate COPD.     

牙槽骨吸收量对牙周膜面积、力学支点和桩核-牙根联合体抗折力学性能的影响

目的探讨牙槽骨吸收量对牙周膜面积、力学支点和桩核-牙根联合体抗折力学性能的影响。方法用108个相同长度、锥度和直径的有机玻璃模拟上中切牙牙根,常规铸造,粘固桩核,分成13组按不同牙槽骨吸收量和力学支点制作加载基底,并根据牙周组织解剖生理特点设计了三种牙周力学方式。以Instron4302力学测试机进行垂直于牙根长轴加载压缩测试,加载速度1 mm/m in,至桩核松动、脱位或牙根折断,记录最大载荷并计算牙周膜面积。结果牙槽骨吸收量和力学支点为0 mm和12/12,1 mm和11/12,2 mm和10/12,3 mm和9/12,3.5 mm和8.5/12,4 mm和8/12,4.5 mm和7.5/12 mm,5 mm和7/12,5.5 mm/和6.5/12,6 mm和6/12,7 mm和5/12,8 mm和4/12,9 mm和3/12组牙周膜面积(mm2)和抗折力均数(N)分别为178.95和232.90±25.93,159.64和195.58±12.46,141.18和173.92±13.51,123.27和154.00±11.74,106.14和132.25±14.29,89.67和96.86±6.20,73.90和59.14±7.28,58.82和52.52±5.82,44.44和45.90±7.40,30.76和58.60±6.63。牙槽骨失量(%)与牙周膜失量(%)呈线性关系、牙槽嵴吸收量与抗折力呈线性关系、牙周膜面积失量(%)与抗折力失量(%)呈线性关系、支点与抗折力失量(%)呈线性关系。结论牙槽骨吸收可引起牙周膜面积减小、力学支点下移和桩核-牙根联合体抗折力下降。     

系统性红斑狼疮患者淋巴细胞亚群早期凋亡的初步研究

目的：检测系统性红斑狼疮(SLE)患者外周血单个核细胞(PBMC)中不同细胞亚群发生凋亡的情况，并初步分析其在SLE发病机制中的意义。方法：取28例SLE患者和性别年龄与之相匹配的20个正常对照者。采用淋巴细胞亚群标志、Annexin-V及碘化丙啶三色荧光标记、流式细胞术检测细胞的早期凋亡。结果：SLE患者体内CD3^ T细胞、CD4^ T细胞和CD8^ T细胞的凋亡百分率均显著高于正常对照组(P＜0．05)。同时，SLE患者T淋巴细胞的死亡百分率也高于正常人。经激素治疗一定时间后，这些细胞亚群的凋亡率会进一步升高(P＜0．01)，但CD4／CD8比值恢复至接近正常人。SLE患考体内CDl9^ B淋巴细胞的凋亡或死亡百分率和正常对照组相比均无明显差别，激素治疗对B细胞凋亡和死亡的影响亦不显著。结论：在SLE患者体内主要是T淋巴细胞凋亡增加，但SLE患者淋巴细胞数目减少不仅仅是因为细胞凋亡所致，死亡细胞数目明显升高也是其中一个重要原因。激素治疗可诱导SLE患者T淋巴细胞进一步发生凋亡，并使T细胞亚群比例有所改善。