北京地区肺癌患者及健康人血硒水平研究

本文通过对北京地区１００例肺癌患者、１５１倒健康对照血清硒和３４例肺癌患者及３６例对照血浆硒和红细胞硒的研究表明：对年龄、性别、吸烟习惯诸因素分析之后，肺癌患者血清和血浆硒显著低于健康对照组，而红细胞硒含量与对照组无差异。据此，作者认为，肺癌患者的低硒状态是癌作用的结果。     

肺癌病人手术前后血清硒锶变化

对肺癌患者手术前、手术后２周及手术后２月血清中硒锶水平进行分析，结果显示：手术前硒含量最低，手术后逐渐升高，２月时接近正常；锶含量手术前最高，手术后逐渐降低，２月后亦接近正常。二者呈负相关变化。提示肺癌发生、发展及转归可能与低硒高锶有关。     

大骨节病患者红细胞免疫及调节功能与红细胞硒水平的关系

对比检测了大骨节病患者、病区及非病区健康居民的红细胞免疫功能、免疫调节功能和红细胞硒水平及谷胱甘肽过氧化物酶活性，结果表明：大骨节病患者的红细胞Ｃ３ｂＲ花环率与病区健康居民接近，但明显低于非病区居民，红细胞Ｃ３ｂＲ花环率与红细胞硒含量和ＧＰＸ活性呈显著平行相关；血清红细胞免疫粘附抑制率与病区健康居民接近，但明显高于非病区居民，血清红细胞免疫粘附抑制率与红细胞硒含量和ＧＰＸ活性呈显著负相关。研究结果说明：大骨节病患者及病区健康居民红细胞免疫及调节功能均有异常，这种异常状态与低硒有关。     

肿瘤患者及健康人血清硒水平研究

对２０３例肿瘤患者和４０例健康对照组血清硒研究表明，肿瘤患者血清硒显著低于健康组（Ｐ＜０．０１～０．００１），而不同肿瘤患者之间无差异，肺癌患者不同分期之间也无统计学意义，结果认为低硒水平可能是肿瘤患者的固有特性。     

血清硒与GSTM1基因多态性在肺癌发生中的交互作用

目的:探讨血清硒水平与GSTM1基因多态性在肺癌发生中的交互作用。方法:采用成组病例-对照研究方法,选择广州地区原发性肺癌患者58例,对照62例,用PCR检测GSTM1基因多态性,用氢化物发生原子荧光光谱法(GHAFS)测定血清硒。结果:病例组血清硒水平显著低于对照组(P=0.001),OR为4.44(95%CI1.64～12.01);GSTM1基因多态性与肺癌危险性关系无统计学意义(OR1.73,95%CI0.84～3.58);血清硒水平低与GSTM1缺失在肺癌发生中有正交互作用。归因交互效应为3.40,归因交互效应百分比为60.18%。结论:血清硒水平与肺癌发生负相关;GSTM1基因单独作用时与肺癌关系不明显,但血清硒水平低与GSTM1缺失之间存在协同作用,使肺癌发生的危险性显著增加。     

肿瘤患者血清硒水平及补硒后的变化

对１８７例不同肿瘤患者血清硒进行了测定，同时观察了部分病例口服补硒后血清硒水平的变化。结果表明：肿瘤病人机体处于低硒状态，给予补硒后，不能使低硒状态得到改善。     

微量元素铜锌硒与肺癌的关系探讨

目的 :探讨血清微量元素水平与肺癌之间的关系。方法 :采用 1 80 - 80型原子吸收分光光度计及 UV- 2 1 0 0可见紫外分光光度计测定 31 0例肺癌患者及 48例健康对照者的血清铜、锌、硒水平。结果 :肺癌患者血清锌、硒水平显著低于对照组 ( P<0 .0 0 1 ) ,铜、铜 /锌比值组间无差异 ;但有肿瘤负荷组患者血清铜及铜 /锌比值则高于无肿瘤负荷组 ( P<0 .0 0 1 ) ,血清锌、硒则组间无差异。非条件 Logistic回归分析表明仅锌、硒进入方程 ,且为保护因素。结论 :低锌、低硒可能是肺癌发生的危险因素 ,而血清铜及铜 /锌比值高则可能是肺癌存在的结果。     

肺癌患者血清硒含量的研究

测定了 35例肺癌患者 (男 2 1女 1 4)以及正常对照组 (男 1 5女 1 1 )血清中硒含量 ,结果表明 :肺癌者血清硒含量 ( 80 .0 4± 1 7.2 2 μg/ L)明显低于正常对照组 ( 1 0 2 .2 4± 1 6.49μg/ L) ,肺癌患者与正常对照组血清硒含量差异有显著性     

微量元素硒与疾病防治

硒是人体的必需微量元素,必须由外界摄入。硒与癌症的防治血清中硒水平与人类各种癌症(肺癌、食管癌、胃癌、肝癌、乳腺癌等)的死亡率呈负相关,即硒水平越高,癌症的死亡率越低。     

细胞色素P450基因多态及血清硒与肺癌的关系

目的 探讨细胞色素P450(A)(CYP1A1)的MSPI基因多态性、血清硒水平单独作用以及联合作用与肺癌发生危险性的关系。方法 采用成组病例一对照研究方法，病例58例，对照62例。用PCR-RFLP技术测定CYP1A1的MsPI多态性。用双道原子荧光光度计(GHAFS)测定血清硒水平。结果 CYP1A1的MsPI基因多态性单独作用时与肺癌危险性关系无显著性差异；病例组血清硒水平显著低于对照组(P=0．001)：以血清硒水平大于等于0．109mg／L。携带CYP1A1野生型者为参照组，则血清硒水平低于0．109mg／L且携带CYPlAl突变型或杂合型或携带野生型者OR分别为9．00(P=0．006)，3．94(P=0．195)，5．40(P=0．036)，而血清硒水平大于等于0．109mg／L携带突变型或携带杂合型者OR分别为1．69(P=0．500)，1．13(P=0．705)。结论 CYP1A1基因多态性单独作用时与肺癌发生无显著相关，血清硒水平与肺癌发生呈负相关；CYP1A1基因多态性与血清硒水平联合作用时明显提高肺癌发生的危险性，在肺癌发生中存在协同作用。     

An Assessment of Serum Selenium Concentration in Women with Endometrial Cancer

Background: Numerous studies have shown a relationship between low serum selenium levels and an increased risk of developing cancer. Methods: A total of 306 women participated in the study: 153 patients diagnosed with endometrial cancer and 153 healthy women who were matched, in terms of birth year (+/−3 years), to the patients from the study group. The quantitative measurement of selenium content in the collected blood samples was performed using a mass spectrometer with excitation in inductively coupled plasma. In order to determine the relationship between the risk factors and the incidence of endometrial cancer, analyses based on single- and multi-factor conditional logistic regression models were performed. Results: The mean concentration of selenium was lower in patients with endometrial cancer than in healthy controls (60.63 µg/L (0.77 µmol/L) vs. 78.74 µg/L (0.99 µmol/L), respectively). When compared in quartiles, a significant association of lower selenium concentration with the incidence of endometrial cancer was recorded. The highest OR was observed in the first and second quartiles (OR-22.0, p-value < 0.001; medium selenium level 46.95 µg/L (0.59 µmol/L), and OR-5.94; p-value < 0.001; medium selenium level 63.60 µg/L (0.80 µmol/L), respectively). Conclusion: A strong correlation between the level of selenium in the blood serum and the risk of endometrial cancer indicates that patients with low levels should be a candidate group requiring appropriate preventive examinations. Further research on a larger group of patients is required.     

血清和癌组织硒,锌,铜与胃癌关系的研究

对９７例胃癌患者手术前、后血清和癌组织中硒、锌、铜含量进行分析，发现胃患者血清硒、锌含量明显低于对照组，血清钢和铜／锌比值明显高于对照组。血清元素变化与胃癌危险性之间有明显的剂量反应关系。胃癌组织中硒水平和铜／锌比值显著高于同源正常组织，锌显著低于正常组织。手术切除肿瘤后６周，血清硒、锌仍然低于对照组，血清钢可恢复至正常水平。铜／锌比值则随着术后体质的改善逐渐下降。提示血硒下降和铜／锌比值升高可做为胃癌诊断的重要参数。     

Serum Selenium Level Predicts 10-Year Survival after Breast Cancer

In a recent prospective study, we reported an association between a low serum selenium level and five-year survival among breast cancer patients. We now have updated the cohort to include 10-year survival rates. A blood sample was obtained from 538 women diagnosed with first primary invasive breast cancer between 2008 and 2015 in the region of Szczecin, Poland. Blood was collected before initiation of treatment. Serum selenium levels were quantified by mass spectroscopy. Each patient was assigned to one of four quartiles based on the distribution of serum selenium levels in the whole cohort. Patients were followed from diagnosis until death or last known alive (mean follow-up 7.9 years). The 10-year actuarial cumulative survival was 65.1% for women in the lowest quartile of serum selenium, compared to 86.7% for women in the highest quartile (p < 0.001 for difference). Further studies are needed to confirm the protective effect of selenium on breast cancer survival. If confirmed this may lead to an investigation of selenium supplementation on survival of breast cancer patients.     

Selenium deficiency in the acquired immunodeficiency syndrome

Severe protein-calorie malnutrition is common in patients with AIDS (acquired immunodeficiency syndrome). These nutritional deficits are likely to further impair immune responses and other organ functions vital for recovery from serious infectious diseases. Since selenium deficiency is known to be associated with oral candidiasis and abnormal phagocytic function in animals and depressed helper T-cell numbers in man, we evaluated both selenium status and other nutritional parameters in 12 patients with AIDS compared to 27 healthy controls. Selenium was measured by a spectrofluorometric method. The mean (+/- SD) plasma selenium level in AIDS was 0.043 +/- 0.01 microgram/ml vs 0.095 +/- 0.016 microgram/ml in controls (p less than 0.001). Whole blood selenium and red blood cell selenium levels were also significantly reduced in AIDS (p less than 0.005). The mean weight loss in AIDS patients was 35.5 +/- 21.2 pounds. Serum albumin was significantly (p less than 0.01) lower in AIDS patients compared to controls. A good correlation between serum albumin and plasma selenium was noted (r = 0.77; p less than 0.001). We conclude that selenium deficiency is a common component of the malnutrition seen in AIDS patients. Therefore, aggressive nutritional support, including attention to selenium status, should be considered an integral part of the therapy of AIDS patients.     

癌症患者血中微量元素与氧化应激的相关研究

目的 :研究癌症患者血中微量元素变化与氧化应激的相关关系。方法 :测定了 1 1 1例癌症病人和 3 6例健康对照血清中 MDA浓度 (作脂质过氧化指标 ) ,微量元素铜、锌、铁、硒及其转运蛋白铜蓝蛋白、白蛋白和转铁蛋白浓度。测定了抗氧化标志物 XOD、GSH、GSHPx、Vit E、Vit C浓度和总抗氧化力水平。结果 :癌症患者脂质过氧化水平 (以 MDA计 )明显高于对照 (P<0 .0 0 1 ) ,总抗氧化力明显低于对照 (P<0 .0 0 1 )。抗氧化标志物 XOD、GSH、GSHPx、Vit E和Vit C无明显变化。癌症患者血清白蛋白浓度明显降低 (P<0 .0 0 1 ) ,血清铜蓝蛋白浓度明显增高 (P<0 .0 2 ) ,血清转铁蛋白浓度未发现有所改变 (P>0 .2 0 )。同健康对照比较 ,血清铜水平明显增高 (P<0 .0 0 1 ) ,血清硒水平明显降低 (P<0 .0 0 1 ) ,但锌和铁水平无显著变化。癌症患者血中铜和 MDA之间呈明显相关 (r=0 .2 81 ,P=0 .0 0 3 ) ,但健康对照间未发现相关性存在。另外 ,肝癌患者血清铁和 MDA存在相关关系 (r=0 .6 80 ,P=0 .0 0 1 )。结论 :癌症患者氧化应激和某些微量元素呈相关变化 ,然而 ,其变化情况可因癌肿、癌症分期以及癌症患者个体因素的不同而有所差异     

肺心病肺癌患者血清微量元素的测定

采用原子吸收分光光度法 ,测定了 1 5例肺心病患者 ,40例肺癌患者血清铜、锌、镁 3种元素 ,并探讨了 3种元素与上述疾病的相互关系。结果表明 ,肺心病患者血清铜及铜 /锌比值与正常组比较无显著差异 (P>0 .0 5) ,血清锌显著低于正常组 (P<0 .0 5)。肺癌患者血清铜及铜 /锌比值均显著高于正常组 (P<0 .0 5) ,血清锌显著低于正常组 (P<0 .0 5)。肺心病患者、肺癌患者血清镁与正常组比较无显著差异 (P>0 .0 5)。提示血清铜、锌、镁含量的变化与疾病发生和疾病状态有关     

肝癌和肺癌患者血清HA的检测及临床意义

目的探讨透明质酸对肝癌和肺癌的临床意义。方法选择97例已确诊但尚未进行治疗的原发性肝癌、肺癌患者,采用放射免疫学方法检测。结果原发性肝癌和肺癌患者血清HA水平与对照组相比具有显著性差异(P<0.01)。结论HA对肝癌和肺癌这两种癌变具有一定的辅助诊断价值及疗效观察和预后判断有重要意义。