4 research outputs found

    Association of genetic dependences between lung cancer and chronic obstructive pulmonary disease

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    WST臉P: Dotychczasowe wyniki bada艅 wskazuj膮 na zwi臋kszone ryzyko zachorowania na raka p艂uca u os贸b ze zmianami obturacyjnymi oskrzeli, w tym u chorych na przewlek艂膮 obturacyjn膮 chorob臋 p艂uc (POChP). Wydaje si臋, 偶e istniej膮 wsp贸lneczynniki patogenetyczne obu chor贸b zwi膮zanych ze zjawiskiem stresu oksydacyjnego. Przedmiotem oceny sta艂y si臋 geny zwi膮zane z procesami naprawy oksydacyjnych uszkodze艅 DNA, geny zwi膮zane z nowotworami, z metabolizmem 偶elaza i geny enzym贸w proteolitycznych.MATERIA艁 I METODY: Badanie przeprowadzono w dw贸ch grupach pacjent贸w licz膮cych 艂膮cznie 107 os贸b: 53 chorych na raka niedrobnokom贸rkowego p艂uca i POChP oraz 54 chorych tylko na POChP. W przypadku wi臋kszo艣ci gen贸w oznaczono polimorfizm pojedynczego nukleotydu metod膮 analizy d艂ugo艣ci fragment贸w restrykcyjnych (RFLP). Analizy statystycznej zmiennych ilo艣ciowych dokonano testem U Manna-Whitneya i testem median, analiza zmiennych genetycznych zosta艂a dokonana testem Chi-kwadrat.WYNIKI: W przypadku polimorfizmu gen贸w zwi膮zanych z metabolizmem 偶elaza istotne statystycznie r贸偶nice pomi臋dzy badanymi grupami wykazano jedynie w przypadku genu haptoglobiny Hp1/2. Stwierdzono cz臋stsze wyst臋powanie formy 1/1 w grupie chorych na POChP i cz臋stsze wyst臋powanie formy 1/2 w grupie chorych na raka p艂uca i POChP. Analiza polimorfizmu gen贸w enzym贸w proteolitycznych i genu inhibitora tych enzym贸w wykaza艂a istotne statystycznie r贸偶nice pomi臋dzy badanymi grupami jedynie w przypadku genu metaloproteinazy MMP3 6A/5A. W przypadku polimorfizmu genu metaloproteinazy MMP12 (A-82G) r贸偶nice w wyst臋powaniu poszczeg贸lnych alleli okre艣lono na poziomie tendencji.WNIOSKI: Wyniki te wskazuj膮, 偶e u chorych z koincydencj膮 POChP i raka p艂uca wyst臋powa艂y r贸偶nice w stosunku do grupy chorych na POChP dotycz膮ce gen贸w zwi膮zanych z metabolizmem 偶elaza oraz gen贸w enzym贸w proteolitycznych.INTRODUCTION: Recent studies have shown an increased risk of lung cancer in patients with bronchial obstructive changes, including patients with COPD. It seems that there are common factors of pathogenesis of both diseases associated with oxidative stress. In the present paper the genes linked to the repair of oxidative damage of DNA, associated with cancer, of iron metabolism and coding proteolytic enzymes were assessed.MATERIAL AND METHODS: The study was conducted in two groups of patients: 53 patients with non-small cell lung cancer and chronic obstructive pulmonary disease, and 54 patients only with chronic obstructive pulmonary disease. The polymorphisms of the single nucleotide were determined in the case of the majority of genes using the PCR-RFLP method. The statistical analysis of quantitative variables was executed using the Mann-Withney U-test and the test of medians; the analysis of genetic variables was executed using the chi虏 test.RESULTS: Regarding the polymorphisms of genes involved in iron metabolism, statistically significant differences between the two groups have been demonstrated only in the case of haptoglobin gene HP1/2. A higher incidence of form 1/1 was found in patients with COPD and a higher incidence of form 1/2 in patients with lung cancer and COPD. Analysis of gene polymorphisms of proteolytic enzymes and inhibitors of the enzyme gene showed statistically significant differences between the two groups only for the MMP3 gene 6A/5A. In the case of the MMP12 gene polymorphism (A-82G) a tendency toward differences in the occurrence of specific alleles was identified.CONCLUSIONS: These results indicate that patients with coincidence of COPD and lung cancer have disorders of the genes involved in iron metabolism, and they have different genetic polymorphisms of proteolytic enzymes comparing to COPD patients

    Insight into the kinetics and the mode of the interaction between smooth muscle calponin and F-actin.

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    Kinetics of the smooth muscle calponin-F-actin interaction was studied by stopped- flow measurements of light scattering and fluorescence intensity of pyrene-labelled F-actin. The intensity and character of the changes in light scattering, and thus the mode of calponin binding to actin filaments leading to changes in their shape and bundling, depend on the molar ratio of the two proteins. Parallel measurements of pyrene-fluorescence quenching upon calponin binding revealed that intrinsic conformational changes in actin filaments are delayed relative to the binding process and are not markedly influenced by the mode of calponin binding. Bundling of actin filaments by calponin was not correlated with fluorescence changes and thus with alterations in the structure of actin filaments
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