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1.
目的探讨云锡矿工肺癌组织DAPK基因的蛋白表达及其甲基化异常。方法收集云锡矿工肺癌组织50例及10例正常肺组织。采用免疫组化检测DAPK蛋白表达,采用原位细胞凋亡检测法检测细胞凋亡,采用甲基化特异性聚合酶链反应检测DAPK基因启动子甲基化。结果50例癌组织中,38?PK蛋白表达阴性,36%检测到DAPK基因启动子异常甲基化,DAPK蛋白表达与细胞凋亡有关(P<0·05),DAPK基因启动子异常甲基化与DAPK蛋白表达呈负相关(P<0·05)。结论①云锡矿工肺癌组织中DAPK基因表达减少或缺失;②云锡矿工肺癌发生发展可能与DAPK基因异常甲基化有关。  相似文献   

2.
云锡矿工肺癌N-ras、c-myc和c-fos原位杂交检测   总被引:1,自引:0,他引:1  
目的探讨云锡矿工肺癌发病机制。方法用原位分子杂交的方法,检测20例云锡矿工肺癌(M组)、20例其它地区非矿工肺癌(NM组)以及10例死于非肺部疾患者的尸解肺组织(C组)中N-ras、c-myc及c-fos癌基因的过表达情况。结果癌基因过表达出现率:M组N-ras55%(11/20)、c-myc50%(10/20)、c-fos25%(5/20);NM组N-ras80%(16/20)、c-myc55%(11/20)、c-fos60%(12/20);C组3个癌基因过表达率均仅为10%(1/10)。表明N-ras、c-myc的过表达与肺癌的发生有关;c-fos与矿工肺癌发生的关系不明显而与非矿工肺癌的发生有关。有2种或3种癌基因同时表达的,M组分别为45%、20%;NM组分别为75%、25%。癌旁增生上皮中发现有阳性反应。结论肺癌的发生可能与2种或2种以上癌基因过表达有关。矿工与其他人群肺癌的发生机制可能有不同之处。  相似文献   

3.
目的 探讨云锡矿工肺癌发病机制。 方法 用原位分子杂交的方法,检测20例云锡矿工肺癌(M组)、20例其它地区非矿工肺癌(NM组)以及10例死于非肺部疾患者的尸解肺组织(C组)中N-ras、c-myc及c-fos癌基因的过表达情况。 结果 癌基因过表达出现率:M组N-ras 55% (11/20)、c-myc 50%(10/20)、c-fos 25%(5/20);NM组N-ras 80% (16/20)、c-myc 55%(11/20)、c-fos 60%(12/20);C组3个癌基因过表达率均仅为10%(1/10)。表明N-ras、c-myc的过表达与肺癌的发生有关;c-fos与矿工肺癌发生的关系不明显而与非矿工肺癌的发生有关。有2种或3种癌基因同时表达的,M组分别为45%、20%;NM组分别为75%、25%。癌旁增生上皮中发现有阳性反应。 结论 肺癌的发生可能与2种或2种以上癌基因过表达有关。矿工与其他人群肺癌的发生机制可能有不同之处。  相似文献   

4.
患者男 ,45岁 ,为锡矿矿工 ,从事采矿作业 14年 ,因肺癌(未予手术治疗 )死亡。病理检查结果 :两肺有尘性弥漫性散在类结节病变 ,并有间质纤维化 ,粉尘散在 ,偏光显微镜检查仅见少量SiO2 结晶存在 ,病变范围不足尘肺Ⅰ期。右上肺后段支气管内有一肿块(1.8cm× 2 .1cm) ,并累及周近肺段 ,镜检证实为中等分化鳞癌 ,我们在肿块边缘部分查见有分化较高疑似腺管及实心巢团的肿瘤成分 ,其结构为类癌 (图 1)。免疫酶标结果为 :NSE阳性 ,CK阳性 ,证实其神经内分泌特征。因而本例的病理诊断为 :肺鳞癌及类癌 (神经内分泌癌 ) ,肺内尘性病…  相似文献   

5.
目的 研究mm23基因的表达产物二磷酸核苷激酶(NDPK)在云锡矿工肺癌中的表达及其与肺癌淋巴结转移的关系。 方法 免疫组化LSAB法。 结果 NDPK在云锡矿工肺癌中有较高表达,阳性率57.9%(33/57),其中,鳞癌56.4%(22/39)、腺癌61.1%(11/18),差异无显著意义(P> 0.05)。在云锡矿工肺鳞癌中,无肺门或纵隔淋巴结转移者阳性率为62.0%(18/29),强阳性占阳性的66.6%(12/18);有肺门或纵隔淋巴结转移者阳性率为40.0%(4/10),强阳性为0(0/4)。二者差异有显著意义(P<0.05)。NDPK的表达与云锡矿工肺腺癌有、无肺门或纵隔淋巴结转移之间,差异无显著意义(P>0.05)。 结论 nm23基因可能在云锡矿工肺鳞癌和肺腺癌形成及转移过程中起不同的调节作用,其表达程度与云锡矿工肺鳞癌淋巴结转移呈负相关;未发现其与云锡矿工肺腺癌淋巴结转移有相关关系。  相似文献   

6.
目的研究nm23基因的表达产物二磷酸核苷激酶(NDPK)在云锡矿工肺癌中的表达及其与肺癌淋巴结转移的关系。方法免疫组化LSAB法。结果NDPK在云锡矿工肺癌中有较高表达,阳性率57.9%(33/57),其中,鳞癌56.4%(22/39)、腺癌61.1%(11/18),差异无显著意义(P>0.05)。在云锡矿工肺鳞癌中,无肺门或纵隔淋巴结转移者阳性率为62.0%(18/29),强阳性占阳性的66.6%(12/18);有肺门或纵隔淋巴结转移者阳性率为40.0%(4/10),强阳性为0(0/4)。二者差异有显著意义(P<0.05)。NDPK的表达与云锡矿工肺腺癌有、无肺门或纵隔淋巴结转移之间,差异无显著意义(P>0.05)。结论nm23基因可能在云锡矿工肺鳞癌和肺腺癌形成及转移过程中起不同的调节作用,其表达程度与云锡矿工肺鳞癌淋巴结转移呈负相关;未发现其与云锡矿工肺腺癌淋巴结转移有相关关系。  相似文献   

7.
目的 探讨窖蛋白-1(caveolin-1)在正常肺组织、云锡矿工肺癌及其他地区肺癌中的表达及其作用,并对云锡矿工肺癌及其他地区肺癌中的caveolin-1表达进行比较研究.方法 收集正常肺组织15例、云锡矿工肺癌组织40例及其他地区肺癌组织40例,采用免疫组化方法 检测cavealin-1表达.结果 15例正常肺组织中支气管上皮细胞caveolin-1表达均呈阴性;caveolin-1在云锡肺癌组织中及其他地区肺癌组织中的表达阳性率分别为65.0%、57.5%,2组肺癌中caveolin-1表达与正常肺组织中caveolin-1表达差异具有统计学意义(P<0.01),且caveolin-1在云锡矿工肺癌中的表达高于其他地区肺癌.结论 ①caveolin-1在正常肺组织的支气管上皮细胞中呈阴性表达,而在肺癌组织中呈阳性表达,提示caveolin-1可能是一个癌基因;②caveolin-1在云锡矿工肺癌中的表达强度高于其他地区肺癌,其机制仍需进一步研究.  相似文献   

8.
9.
目的:研究芳烃羟化酶(AHH)与吸烟在肺癌易感中的作用。方法:采用AHH直接测定法,检测肺癌患者40例、肺癌患者亲属26例及健康人45例血液淋巴细胞中AHH的诱导力。结果:(1)吸烟者中,肺癌患者AHH高,中、低诱导力者分别与不吸烟对照组相比有高度显著性差异(P〈0.001,P〈0.03,P〈0.001),(2)肺癌患者亲属(一级亲24人,二级亲2人)吸烟者中AHH低诱导力者与不吸烟对照组相比有增  相似文献   

10.
对云锡矿某厂矿矿工肺癌发病趋势的预测兰州军区军事医学研究所(兰州730020)刘兵中国预防医学科学院劳卫所刘玉堂,陈珍据文献报道[1].云锡矿50年代中期之前,由于井下干式作业,空气粉尘浓度较高,其中砷浓度平均为0.29mg/m3,高出卫生标准(美国...  相似文献   

11.
吸烟与氡暴露致肺癌的流行病学和生物学差异   总被引:2,自引:0,他引:2  
吸烟和氡暴露是导致肺癌的两个主要危险因素。本文从流行病学和生物学分子效应两个方面,总结了吸烟和氡暴露致肺癌的近期研究结果,比较了二者的人群和生物学差异,并提出了今后的研究建议。  相似文献   

12.
A case-control study was undertaken to assess the association between lung cancer and silicosis or silica dust exposure in white South African gold miners. Cases and controls were identified from deaths reported to the Gold Miners Provident Fund for the period January, 1979-October, 1983. Two controls were matched to each case by year of birth (+/- 2 years) and by smoking (+/- 5 cigarettes or equivalents per day) assessed 10 years (+/- 2 years) prior to death. One hundred thirty-three matched triplets were identified. The results showed no overall association between lung cancer and radiological silicosis (OR = 1.08, p = 0.92). Autopsy data indicated no overall associations between lung cancer and silicosis of the lung parenchyma (OR = 1.49, p = 0.11), the pleura (OR = 0.72, p = 0.30), or the hilar glands (OR = 0.85, p = 0.72). A trend toward increased severity of silicosis of the parenchyma was evident; however, this was not statistically significant (p = 0.08). Odds ratios for lung cancer and silicosis were higher at lower levels of cumulative silica dust exposure (ORs = 2.43, 1.72, 1.35 and 0.62 for lung cancer and autopsy silicosis of the parenchyma for the lowest, second, third, and highest quartiles of dust exposure, respectively; all p greater than 0.05). Cases did not differ from controls for total silica dust exposure, length of exposure, weighted average intensity of exposure, or number of shifts at high dust (all p greater than 0.20). The data do not support the hypothesis of a carcinogenic role for silica dust and no statistically significant associations were found between lung cancer and silicosis.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   

13.
某矿井下接尘工人减寿死因分析   总被引:1,自引:0,他引:1  
傅华  杨剑 《中国职业医学》1992,19(5):269-270
为了解影响井下接尘工人寿命的主要因素,本文对大厂长坡锡矿井下工人进行了一次回顾性定群研究,在28年观察期间,1077名矿工有137人死亡。第一位死因是肺癌,第二位死因是肺心病。去肺癌死因后,工人可期望增寿15岁左右;去肺心病因后,期望增寿岁数仅约2岁。在吸烟组,去肺癌死囚后可期望增寿约25岁;在非吸烟组,去肺癌死因后可期望增寿6岁。结果提示肺癌对这接尘人群的寿命威胁最大,而劝阻吸烟者应为防制肺癌主要措施的重点。  相似文献   

14.
Objectives We conducted an epidemiological study of the relationship between lung cancer incidence and smoking, with special reference to the benefits of smoking cessation for reducing lung cancer incidence, to promote a local smoking control program. Methods The study was a retrospective cohort study. The population studied was 16,383 male examinees of lung cancer health examinations in 1995 in Tottori Prefecture, Japan. Smoking status from the questionnaire during the health examination was used as the exposure variable. Endpoint (lung cancer incidence) was obtained from the Tottori population-based cancer registry. A multivariable analysis using the Cox proportional hazard model was adapted for statistical analysis. The average follow-up period was 4.3 years. Results The hazard ratio of current smokers for the incidence of lung cancer was 4.9, whereas that of ex-smokers was 2.2. The dose-response relationship between lung cancer incidence and lifetime cigarette consumption (pack year) was determined. The ratio increased among younger subjects (under 65 years old). The hazard ratio of ex-smokers decreased with years just after quitting smoking, and reached the level of never smokers after 10–19 years from smoking cessation. Conclusions We reconfirmed that the magnitude of risk estimates of smoking for lung cancer incidence was similar to those of previous studies, and smoking cessation was effective for reducing lung cancer risk.  相似文献   

15.
    
Using the Annenberg Perception of Tobacco Risk Survey 2, this paper finds that perceived risk deters smoking among persons aged 14-22 years who think that it is relatively difficult to quit smoking and that onset of deleterious health effects occurs relatively quickly. Perceived health risk, however, does not affect the smoking status of young people who hold the opposite beliefs. These results are consistent with predictions of rational addiction models and suggest that young people, who view smoking as more addictive and health effects as more immediate, may have greater incentive to consider long-term health effects in their decision to smoke.  相似文献   

16.
    
STUDY OBJECTIVE: Given the advanced stage of most oral cancer cases at diagnosis, it is hypothesised that a significant proportion of higher risk adults do not visit a dentist annually. The study objectives were to assess whether long term smokers were less likely to visit the dentist. DESIGN: Data from the 1998 Massachusetts Behavioral Risk Factor Surveillance System, a population-based, random digit dial telephone health survey, were used to evaluate whether adults at higher risk of oral cancer attributable to long term cigarette smoking were less likely to go to the dentist, controlling for socioeconomic, demographic, and health related characteristics. PATIENTS: A representative sample of 2119 Massachusetts adults aged 35 and older. MAIN RESULTS: Adults who were long term smokers were less likely than never smokers to have visited the dentist in the previous year (adjusted OR = 0.69, 95% confidence intervals (CI) = 0.48, 0.99). Moreover, adults who were at higher risk from both long term smoking and low fruit and vegetable consumption were even less likely to visit the dentist than adults with neither risk factor (adjusted OR = 0.39, 95% CI = 0.22, 0.68). Among long term smokers, the likelihood of a yearly examination decreased with increasing smoking duration and amount smoked per day. CONCLUSIONS: These findings support the hypothesis that adults at higher risk of oral cancer attributable to long term cigarette smoking are less likely to have routine dental examinations, even controlling for socioeconomic and health related differences.  相似文献   

17.
本文报告了1986~1988年福建省宁化钨矿、福安钼矿和连城铅锌矿中氡及其于体浓度调查结果。在三个矿井申氡子体α潜能浓度以宁化钨矿为最高,平均值达4.26×10~(-5)J·m~(-3),比国家标准限值约高出4.5倍;钼矿和铅锌矿氡子体α潜能浓度分别为3.20×10~(-7)J·m~(-3)和5.94×10~(-7)J·m~(-3)。估计了三个矿各工种矿工肺部所受氡子体α潜能年暴露量以及终生肺癌危险度,并将其结果与国内外文献资料作了比较。  相似文献   

18.
目的了解江苏省青少年吸烟及二手烟暴露情况。方法采用多阶段分层整群随机抽样的方法,在14个监测点随机抽取5 697名初中学生进行问卷调查,对吸烟和二手烟暴露情况进行加权分析估计率及其95%CI。结果青少年尝试和现在吸烟率分别为9.2%(7.3%~11.5%)和1.0%(0.6%~1.7%),学生在家、室内和室外公共场所二手烟暴露比例为分别为40.0%(34.7%~45.6%)、50.7%(45.0%~56.4%)、52.6%(45.9%~59.2%),在过去30d内,40.7%(35.8%~45.8%)的学生看到有人在学校的室内外场所吸烟。认为"二手烟肯定有害健康"的比例为76.2%(73.5%~78.8%),赞同室内和室外公共场所禁烟的比例分别为62.6%(60.2%~64.9%)和64.5%(62.7%~66.2%)结论江苏省青少年存在尝试吸烟和现在吸烟现象,二手烟暴露率较高,应大力开展综合性的控烟干预。  相似文献   

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