Gouveia M.J.,University of Porto |
Gouveia M.J.,Insa National Health Institute Dr Ricardo Jorge |
Santos J.,University of Porto |
Brindley P.J.,George Washington University |
And 5 more authors.
Cancer Letters | Year: 2015
An estrogen-DNA adduct mediated pathway may be involved in the pathogenesis of the squamous cell carcinoma of the bladder associated with infection with the blood fluke Schistosoma haematobium. Extracts from developmental stages of S. haematobium, including eggs, induce tumor-like phenotypes in cultured cells. In addition, estrogen-derived, reactive metabolites occur in this pathogen and in sera of infected persons. Liquid chromatography-mass spectrometry analysis was performed on urine from 40 Angolans diagnosed with urogenital schistosomiasis (UGS), half of who also presented UGS-associated squamous cell carcinoma and/or urothelial cell carcinoma. The analysis revealed numerous estrogen-like metabolites, including seven specifically identified in UGS cases, but not reported in the database of metabolites in urine of healthy humans. These schistosome infection-associated metabolites included catechol estrogen quinones (CEQ) and CEQ-DNA-adducts, two of which had been identified previously in S. haematobium. In addition, novel metabolites derived directly from 8-oxo-7, 8-dihydro-2'-deoxyguanosine (8-oxodG) were identified in urine of all 40 cases of UGS. These metabolites can be expected to provide deeper insights into the carcinogenesis UGS-induced bladder cancer, and as biomarkers for diagnosis and/or prognosis of this neglected tropical disease-linked cancer. © 2015 Elsevier Ireland Ltd.
Gomes-Neves E.,Abel Salazar Biomedical Sciences Institute |
Cardoso C.S.,University of Porto |
Araujo A.C.,Direccao Geral de Veterinaria |
Correia da Costa J.M.,Insa National Health Institute Dr Ricardo Jorge
Food Control | Year: 2011
Professional training for meat handlers is an European Community food law requirement in order to apply HACCP principles and achieve food safety goals. A self-administered questionnaire designed to assess " Knowledge" and " Practice" of public hygiene measures was completed by meat handlers (MH) (n = 159) in slaughterhouses in Portugal. A significant proportion of the group (72.7%) has had professional training in two different areas: Good Practice in Food Industry (12.03%) and Work Safety and Hygiene (22.8%); 37.9% of the respondents have had training in both areas. However 24.5% of the subjects have never had training. Meat handlers with professional training in Good Practice in Food Industry (GPFI) and in both areas (BT) have had the highest proportions of correct answers in Knowledge (66.92 ± 16.36 and 67.26 ± 21.05, respectively) and Practice questions (70.53 ± 17.47 and 68.67 ± 22.58, respectively).The results of this study point to the need to improve training, particularly in Good Practice in Food Industry, thus enabling meat handlers to achieve more correct answers in Knowledge and Practice. The development of evaluation criteria for the effectiveness of professional training is crucial to protect Public Health. © 2010 Elsevier Ltd.