Pesquisa de anticorpos contra o vírus da imunodeficiência humana tipos 1 e 2 em amostras de sangue seco coletadas em papel filtro

Human Immunodeficiency Vírus Type 1 and 2 antibodies detection was performed in 457 dried whole blood spots samples (S&S 903). Q-Preven HIV 1+2 was the screening test used. The results were compared with the gold standard serum tests by ELISA (Cobas Core e Axsym HIV1/2 gO) and imunofluorescence was the definitive confirmatory test. The samples were obtained from the Hospital Nossa Senhora da Conceição in Porto Alegre, RS - Brazil, through whole blood transfer to filter paper card and sent to Caxias do Sul, RS - Brazil where the tests were performed. The dried whole blood spot stability was evaluated with two different panels. The first one was composed of five negative and five positive samples stored at room temperature, 4 ºC, -20 ºC and -70 ºC, while the second was composed of two negative and three positive samples stored at 37 ºC (humidityForam realizados 457 testes para detectar anticorpos contra o Vírus da Imunodeficiência Humana tipos 1 e 2, em amostras de sangue total seco coletadas em papel filtro (S&S 903), com o teste de triagem Q-Preven HIV 1+2, comparando-se com os resultados dos testes de triagem no soro (Cobas Core e Axsym HIV1/2 gO), sendo a imunofluorescência indireta o teste confirmatório. As amostras foram obtidas no Hospital Conceição em Porto Alegre, pela transferência de sangue total para cartão de papel filtro e encaminhadas para Caxias do Sul para a realização dos testes. Foi analisada a estabilidade da amostra em papel filtro com a utilização de dois painéis: o primeiro com cinco amostras negativas e cinco positivas armazenadas por seis semanas à temperatura ambiente, 4 ºC, -20 ºC e -70 ºC; o segundo com duas negativas e três positivas armazenadas por seis semanas com avaliações semanais a 37 ºC (umidad

Expressão da elafina em tubas uterinas com gravidez ectópica

Objetivo: Comparar a expressão da elafina nas tubas uterinas em casos de gravidez normal e ectópica. Desenho do estudo: Estudo de controle de casos. Foi realizada análise imunohistoquímica em secções teciduais em casos de gravidez ectópica (n=10) e em tubas normais (n=10) a partir de blocos de parafina, obtidas de indivíduos com caso confirmado de gravidez ectópica e que foram submetidos a salpingectomia devido a condições benignas (controle). A principal medida de resultado foi a intensidade da coloração com 3,3’-diaminobenzidina (DAB) com a utilização do software ImageJ. A análise estatística foi realizada com o teste t não pareado. Conclusão: A expressão da elafina é reduzida no epitélio das tubas de casos de gravidez ectópica em comparação às tubas de casos de gravidez não ectópica.Objective: To compare the elafin expression in Fallopian tubes of normal and ectopic pregnacies. Study design: Case-control study. Immunohistochemical analysis was performed on tissue sections of ectopic pregnancies (n=10) and normal tubes (n=10) from paraffin embedded blocks, obtained from subjects with confirmed ectopic pregancy (case) and who underwent salpingectomy for benign conditions (control). Main outcome measure was the intensity of the staining with 3,3’-diaminobenzidine (DAB) using ImageJ software. Statistical analysis was performed using Unpaired t-test. Conclusion: The expression of elafin is reduced in tubal epithelium of ectopic pregnancies, compared to non ectopic pregnancy tubes

Reassessing tumor markers in local recurrences of breast cancer: a new insight

It is believed that a local recurrence of a primitive breast cancer has the same prognostic factor profi le as its primary breast cancer tumor. Material/Methods: We compared the immunohistochemical expressions of the tumor suppressor protein p53, estrogen receptor (ER), c-erbB2, and E-cadherin in 57 primary invasive breast cancers and in their respective LRs. The McNemar test and the kappa index were used for statistical analysis. Results: In 30 patients (52.6%) the expression of at least one of these markers was different between the primary and locally recurrent tumors. No signifi cant difference was observed between variations in the positive and negative expressions in the primary tumor and local recurrence in cerbB2 (kappa= 0.86), E-cadherin (kappa=0.55), and p53 (kappa=0.7). However, the ER presented a low kappa index (kappa=0.26, p>0.05). Conclusions: ER expression should be reviewed in local recurrent breast cancer. This relevant change in ER expression is likely to change the current clinical practice in breast cancer evaluation and treatment

Reassessing tumor markers in local recurrences of breast cancer: a new insight

It is believed that a local recurrence of a primitive breast cancer has the same prognostic factor profi le as its primary breast cancer tumor. Material/Methods: We compared the immunohistochemical expressions of the tumor suppressor protein p53, estrogen receptor (ER), c-erbB2, and E-cadherin in 57 primary invasive breast cancers and in their respective LRs. The McNemar test and the kappa index were used for statistical analysis. Results: In 30 patients (52.6%) the expression of at least one of these markers was different between the primary and locally recurrent tumors. No signifi cant difference was observed between variations in the positive and negative expressions in the primary tumor and local recurrence in cerbB2 (kappa= 0.86), E-cadherin (kappa=0.55), and p53 (kappa=0.7). However, the ER presented a low kappa index (kappa=0.26, p>0.05). Conclusions: ER expression should be reviewed in local recurrent breast cancer. This relevant change in ER expression is likely to change the current clinical practice in breast cancer evaluation and treatment

Evaluation of the human immunodeficiency virus type 1 and 2 antibodies detection in dried whole blood spots (dbs) samples Pesquisa de anticorpos contra o vírus da imunodeficiência humana tipos 1 e 2 em amostras de sangue seco coletadas em papel filtro

Human Immunodeficiency Vírus Type 1 and 2 antibodies detection was performed in 457 dried whole blood spots samples (S&S 903). Q-Preven HIV 1+2 was the screening test used. The results were compared with the gold standard serum tests by ELISA (Cobas Core e Axsym HIV1/2 gO) and imunofluorescence was the definitive confirmatory test. The samples were obtained from the Hospital Nossa Senhora da Conceição in Porto Alegre, RS - Brazil, through whole blood transfer to filter paper card and sent to Caxias do Sul, RS - Brazil where the tests were performed. The dried whole blood spot stability was evaluated with two different panels. The first one was composed of five negative and five positive samples stored at room temperature, 4 ºC, -20 ºC and -70 ºC, while the second was composed of two negative and three positive samples stored at 37 ºC (humidity <50%). Each sample was screened every week for six weeks. These measurement results didn't show variation during the study period. The detected sensibility was 100%, specificity was 99.6%, the positive predictive value was 99.5% and negative predictive values were 100%. The results demonstrated high performance characteristics, opening a new perspective of dried whole blood spot utilization in HIV screening diagnosis.<br>Foram realizados 457 testes para detectar anticorpos contra o Vírus da Imunodeficiência Humana tipos 1 e 2, em amostras de sangue total seco coletadas em papel filtro (S&S 903), com o teste de triagem Q-Preven HIV 1+2, comparando-se com os resultados dos testes de triagem no soro (Cobas Core e Axsym HIV1/2 gO), sendo a imunofluorescência indireta o teste confirmatório. As amostras foram obtidas no Hospital Conceição em Porto Alegre, pela transferência de sangue total para cartão de papel filtro e encaminhadas para Caxias do Sul para a realização dos testes. Foi analisada a estabilidade da amostra em papel filtro com a utilização de dois painéis: o primeiro com cinco amostras negativas e cinco positivas armazenadas por seis semanas à temperatura ambiente, 4 ºC, -20 ºC e -70 ºC; o segundo com duas negativas e três positivas armazenadas por seis semanas com avaliações semanais a 37 ºC (umidade <50%). Os resultados de todas as amostras testadas foram mantidos. A sensibilidade foi de 100%, a especificidade de 99,6%, o valor preditivo positivo de 99,5% e o valor preditivo negativo de 100%. O excelente desempenho observado na análise da utilização de sangue seco em papel filtro, abre uma nova perspectiva no diagnóstico da infecção pelo HIV