@article {8300, title = {Iron signature in asbestos-induced malignant pleural mesothelioma: A population-based autopsy study.}, journal = {J Toxicol Environ Health A}, volume = {79}, year = {2016}, month = {2016}, pages = {129-41}, abstract = {

Malignant pleural mesothelioma (MPM) is an aggressive cancer with poor prognosis. The development of MPM is frequently linked to inhalation of asbestos fibers. A genetic component of susceptibility to this disease is suggested by the observation that some individuals develop MPM following lower doses of asbestos exposure, whereas others exposed to higher quantities do not seem to be affected. This hypothesis is supported also by frequent reports of MPM familial clustering. Despite the widely recognized role of iron (Fe) in cellular asbestos-induced pulmonary toxicity, the role of the related gene polymorphisms in the etiology of MPM has apparently not been evaluated. Eighty-six single-nucleotide polymorphisms (SNPs) of 10 Fe-metabolism genes were examined by exploiting formalin-fixed paraffin-embedded postmortem samples from 77 patients who died due to MPM (designated AEM) and compared with 48 who were exposed to asbestos but from died in old age of cause other than asbestos (designated AENM). All subjects showed objective signs of asbestos exposure. Three SNPs, localized in the ferritin heavy polypeptide, transferrin, and hephaestin genes, whose frequencies were distributed differently in AEM and AENM populations, were identified. For ferritin and transferrin the C/C and the G/G genotypes, respectively, representing intronic polymorphisms, were significantly associated with protection against MPM and need to be considered as possible genetic markers of protection. Similarly, the C/C hephaestin SNP, a missense variation of this multicopper ferroxidase encoding gene, may be related, also functionally, with protection against MPM. In conclusion, it is proposed that three Fe metabolism-associated genes, significantly associated with protection against development of MPM, may serve as protective markers for this aggressive tumor.

}, keywords = {Adult, Aged, Asbestos, Autopsy, Case-Control Studies, Female, Ferritins, Gene Frequency, Genetic Markers, Humans, Iron, Lung Neoplasms, Male, Membrane Proteins, Mesothelioma, Middle Aged, Mutation, Missense, Polymorphism, Single Nucleotide, Transferrin, Young Adult}, issn = {1528-7394}, doi = {10.1080/15287394.2015.1123452}, author = {Crovella, Sergio and Bianco, Anna Monica and Vuch, Joseph and Zupin, Luisa and Moura, Ronald Rodrigues and Trevisan, Elisa and Schneider, Manuela and Brollo, Alessandro and Nicastro, Enza Maria and Cosenzi, Alessandro and Zabucchi, Giuliano and Borelli, Violetta} } @article {3623, title = {DEFB1 polymorphisms are involved in susceptibility to human papillomavirus infection in Brazilian gynaecological patients.}, journal = {Mem Inst Oswaldo Cruz}, volume = {109}, year = {2014}, month = {2014 Nov}, pages = {918-22}, abstract = {

The human beta defensin 1 (hBD-1) antimicrobial peptide is a member of the innate immune system known to act in the first line of defence against microorganisms, including viruses such as human papillomavirus (HPV). In this study, five functional polymorphisms (namely g-52G>A, g-44C>G and g-20G>A in the 5{\textquoteright}UTR and c.*5G>A and c.*87A>G in the 3{\textquoteright}UTR) in the DEFB1 gene encoding for hBD-1 were analysed to investigate the possible involvement of these genetic variants in susceptibility to HPV infection and in the development of HPV-associated lesions in a population of Brazilian women. The DEFB1 g-52G>A and c.*5G>A single-nucleotide polymorphisms (SNPs) and the GCAAA haplotype showed associations with HPV-negative status; in particular, the c.*5G>A SNP was significantly associated after multiple test corrections. These findings suggest a possible role for the constitutively expressed beta defensin-1 peptide as a natural defence against HPV in the genital tract mucosa.

}, keywords = {Adolescent, Adult, Aged, beta-Defensins, Brazil, Case-Control Studies, Female, Genetic Predisposition to Disease, Haplotypes, Humans, Middle Aged, Papillomavirus Infections, Polymorphism, Single Nucleotide, Reproductive Tract Infections, Young Adult}, issn = {1678-8060}, author = {Segat, Ludovica and Zupin, Luisa and Moura, Ronald Rodrigues and Coelho, Ant{\^o}nio Victor Campos and Chagas, B{\'a}rbara Simas and de Freitas, Antonio Carlos and Crovella, Sergio} }