Abstract: Background: epigenomes can be influenced by environmental factors leading to the development of diseases. Objective: To investigate the influence of sun exposure on global DNA methylation and hydroxymethylation status and at specific sites of the miR-9-1, miR-9-3 and MTHFR genes in skin samples of subjects with no history of skin diseases. Methods: Skin samples were obtained by punch on sun-exposed and sun-protected arm areas from 24 corpses of 16-89 years of age. Genomic DNA was extracted from skin samples that were ranked according to Fitzpatrick's criteria as light, moderate, and dark brown. Global DNA methylation and hydroxymethylation and DNA methylation analyses at specific sites were performed using ELISA and MSP, respectively. Results: No significant differences in global DNA methylation and hydroxymethylation levels were found among the skin areas, skin types, or age. However, gender-related differences were detected, where women showed higher methylation levels. Global DNA methylation levels were higher than hydroxymethylation levels, and the levels of these DNA modifications correlated in skin tissue. For specific sites, no differences among the areas were detected. Additional analyses showed no differences in the methylation status when age, gender, and skin type were considered; however, the methylation status of the miR-9-1 gene seems to be gender related. Study limitations: there was no separation of dermis and epidermis and low sample size. Conclusion: sun exposure does not induce changes in the DNA methylation and hydroxymethylation status or in miR-9-1, miR-9-3 and MTHFR genes for the studied skin types.

Resumo Devido à alta prevalência da presbiacusia e as suas consequências, métodos de triagem auditiva são necessários no âmbito da atenção primária. Diante disso, o objetivo do estudo foi verificar a reprodutibilidade e acurácia do teste do sussurro como metodologia de triagem auditiva em idosos. Trata-se de estudo transversal com medidas de acurácia que incluiu 210 idosos, entre 60 e 97 anos, submetidos ao teste do sussurro com dez expressões diferentes e ao exame de referência audiometria tonal limiar. Calculou-se a sensibilidade, a especificidade, o valor preditivo positivo, o valor preditivo negativo e a acurácia do teste, avaliada por meio da área sob a curva Receiver Operating Characteristic (ROC). O teste foi repetido em 20% das orelhas por um segundo examinador com a finalidade de avaliar a reprodutibilidade interexaminador (RIE). As expressões que apresentaram melhor área sob a curva ROC (AUC) e RIE foram: “sapato” (AUC = 0,918; RIE = 0,877), “janela” (AUC = 0,917; RIE = 0,869), “parece que vai chover” (AUC = 0,911; RIE = 0,810) e o “ônibus está atrasado” (AUC = 0,900; RIE = 0,810). Estas são, pois, as expressões propostas para fazerem parte do protocolo do teste do sussurro que mostrou-se como uma ferramenta útil para triagem auditiva em idosos.

Abstract Given the high prevalence of presbycusis and its detrimental effect on quality of life, screening tests can be useful tools for detecting hearing loss in primary care settings. This study therefore aimed to determine the accuracy and reproducibility of the whispered voice test as a screening method for detecting hearing impairment in older people. This cross-sectional study was carried out with 210 older adults aged between 60 and 97 years who underwent the whispered voice test employing ten different phrases and using audiometry as a reference test. Sensitivity, specificity and positive and negative predictive values were calculated and accuracy was measured by calculating the area under the ROC curve. The test was repeated on 20% of the ears by a second examiner to assess inter-examiner reproducibility (IER). The words and phrases that showed the highest area under the curve (AUC) and IER values were: “shoe” (AUC = 0.918; IER = 0.877), “window” (AUC = 0.917; IER = 0.869), “it looks like it's going to rain” (AUC = 0.911; IER = 0.810), and “the bus is late” (AUC = 0.900; IER = 0.810), demonstrating that the whispered voice test is a useful screening tool for detecting hearing loss among older people. It is proposed that these words and phrases should be incorporated into the whispered voice test protocol.

Resumo Devido à alta prevalência da presbiacusia e as suas consequências, métodos de triagem auditiva são necessários no âmbito da atenção primária. Diante disso, o objetivo do estudo foi verificar a reprodutibilidade e acurácia do teste do sussurro como metodologia de triagem auditiva em idosos. Trata-se de estudo transversal com medidas de acurácia que incluiu 210 idosos, entre 60 e 97 anos, submetidos ao teste do sussurro com dez expressões diferentes e ao exame de referência audiometria tonal limiar. Calculou-se a sensibilidade, a especificidade, o valor preditivo positivo, o valor preditivo negativo e a acurácia do teste, avaliada por meio da área sob a curva Receiver Operating Characteristic (ROC). O teste foi repetido em 20% das orelhas por um segundo examinador com a finalidade de avaliar a reprodutibilidade interexaminador (RIE). As expressões que apresentaram melhor área sob a curva ROC (AUC) e RIE foram: “sapato” (AUC = 0,918; RIE = 0,877), “janela” (AUC = 0,917; RIE = 0,869), “parece que vai chover” (AUC = 0,911; RIE = 0,810) e o “ônibus está atrasado” (AUC = 0,900; RIE = 0,810). Estas são, pois, as expressões propostas para fazerem parte do protocolo do teste do sussurro que mostrou-se como uma ferramenta útil para triagem auditiva em idosos.

Abstract Given the high prevalence of presbycusis and its detrimental effect on quality of life, screening tests can be useful tools for detecting hearing loss in primary care settings. This study therefore aimed to determine the accuracy and reproducibility of the whispered voice test as a screening method for detecting hearing impairment in older people. This cross-sectional study was carried out with 210 older adults aged between 60 and 97 years who underwent the whispered voice test employing ten different phrases and using audiometry as a reference test. Sensitivity, specificity and positive and negative predictive values were calculated and accuracy was measured by calculating the area under the ROC curve. The test was repeated on 20% of the ears by a second examiner to assess inter-examiner reproducibility (IER). The words and phrases that showed the highest area under the curve (AUC) and IER values were: “shoe” (AUC = 0.918; IER = 0.877), “window” (AUC = 0.917; IER = 0.869), “it looks like it's going to rain” (AUC = 0.911; IER = 0.810), and “the bus is late” (AUC = 0.900; IER = 0.810), demonstrating that the whispered voice test is a useful screening tool for detecting hearing loss among older people. It is proposed that these words and phrases should be incorporated into the whispered voice test protocol.

Leprosy inflammatory episodes [type 1 (T1R) and type 2 (T2R) reactions] represent the major cause of irreversible nerve damage. Leprosy serology is known to be influenced by the patient’s bacterial index (BI) with higher positivity in multibacillary patients (MB) and specific multidrug therapy (MDT) reduces antibody production. This study evaluated by ELISA antibody responses to leprosy Infectious Disease Research Institute diagnostic-1 (LID-1) fusion protein and phenolic glycolipid I (PGL-I) in 100 paired serum samples of 50 MB patients collected in the presence/absence of reactions and in nonreactional patients before/after MDT. Patients who presented T2R had a median BI of 3+, while MB patients with T1R and nonreactional patients had median BI of 2.5+ (p > 0.05). Anti-LID-1 and anti-PGL-I antibodies declined in patients diagnosed during T1R (p < 0.05). Anti-LID-1 levels waned in MB with T2R at diagnosis and nonreactional MB patients (p < 0.05). Higher anti-LID-1 levels were seen in patients with T2R at diagnosis (vs. patients with T1R at diagnosis, p = 0.008; vs. nonreactional patients, p = 0.020) and in patients with T2R during MDT (vs. nonreactional MB, p = 0.020). In MB patients, high and persistent anti-LID-1 antibody levels might be a useful tool for clinicians to predict which patients are more susceptible to develop leprosy T2R.

The purpose of this study was to investigate the effect of aging on the DNA methylation status of two genes involved in tumorigenesis (telomerase gene hTERT and DNA repair gene- MLH1) and one in metabolism (methylenetetrahydrofolate reductase gene- MTHFR) in oral epithelial cells. DNA methylation analysis was performed by Methylation Sensitive Restriction Enzymes (MSRE) of healthy oral epithelial cells of child (6-10 years, n=21), young (20-25 years, n=19) and elderly (over 60 years, n=25). The results for the hTERT gene showed significant variation in the methylation frequency at CpG dinucleotides among the groups (p=0.0001), with the methylated condition more frequently in children and young people. In relation to MLH1 and MTHFR, no differences were observed among the groups and the unmethylated condition were present in most individuals (p>0.05). Thus, it was concluded that aging of oral epithelial cells was associated with hypomethylation of the hTERT gene promoter and this could be a promising marker for screening a set of age-related alterations.