HPA-1a/1b could be considered a molecular predictor of poor prognosis in chronic hepatitis C

Abstract INTRODUCTION: HPA polymorphism has been associated with HCV presence and fibrosis progression in chronic hepatitis C. However, it is unknown if there is an association between HPA-1 polymorphism and hepatocellular carcinoma (HCC). Therefore, this study aimed to evaluate HPA-1 polymorphism in the presence of HCC. METHODS: PCR-SSP was used to perform HPA genotyping on 76 HCV-infected patients. RESULTS: There was no association between patients with and without HCC. There was significant difference in HPA-1 genotypic frequency distribution between HCC and F1/F2 fibrosis degree. CONCLUSIONS: The HPA-1a/1b polymorphism appears to be more associated with liver damage progression than with HCC presence.

The absence of the human platelet antigen polymorphism effect on fibrosis progression in human immunodeficiency virus-1/hepatitis C virus coinfected patients

Hepatic fibrosis progression in patients with chronic hepatitis C virus infections has been associated with viral and host factors, including genetic polymorphisms. Human platelet antigen polymorphisms are associated with the rapid development of fibrosis in HCV-monoinfected patients. This study aimed to determine whether such an association exists in human immunodeficiency virus-1/hepatitis C virus-coinfected patients.

Coinfecção pelos vírus da hepatite C (VHC) e vírus da imunodeficiência humana (HIV) polimorfismo dos sistemas HPA -1, -3, e -5 / Co-infection by the virus of Hepatitis C (VHC) and virus of the human immunodeficiency (HIV): polymorphism system HPA-1, -3 e -5

Além de fatores virais e do hospedeiro a progressão da fibrose hepática resultante da infecção pelo Vírus da Hepatite C (VHC) tem sido relacionada a polimorfismos genéticos do hospedeiro. Nesta linha, recentemente polimorfismos dos Antígenos Plaquetários Humanos (HPA) foram associados à progressão para fibrose em pacientes monoinfectados pelo VHC. Alguns destes antígenos HPA residem em proteínas da família das integrinas, cuja expressão, também, já foi associada à progressão da fibrose hepática. No entanto, estudos relacionando polimorfismos genéticos do hospedeiro em pacientes coinfectados com o VHC e o Vírus da Imunodeficiência Humana (HIV) são raros e, não há nenhum estudo relacionando polimorfismos HPA com progressão para fibrose. Assim, o objetivo deste estudo foi avaliar possíveis associações dos polimorfismos dos sistemas HPA-1, -3 e -5, que residem em integrinas, na progressão da fibrose hepática em indivíduos coinfectados VHC/HIV. DNA Genômico de 56 pacientes coinfectados VHC/HIV foi utilizado como fonte para genotipagem dos sistemas HPA -1 e -3 por PCR-SSP, e HPA -5 por PCR-RFLP. Progressão da fibrose foi avaliada utilizando o escore de METAVIR, sendo constituídos dois grupos: Grupo 1 (G1): pacientes coinfectados VHC/HIV com baixo grau de fibrose (F1, fibrose portal sem septos ou F2, com poucos septos) e Grupo 2 (G2): pacientes coinfectados VHC/HIV com fibrose avançada (F3, numerosos septos ou F4, cirrose). Um grupo controle, do estudo de Silva e colaboradores (2012), constituído por pacientes monoinfectados pelo VHC com baixo grau de fibrose (F1 ou F2) e fibrose avançada (F3 ou F4) foi utilizado para as análises realizadas neste estudo...

To evaluate the associations of Human Platelet Antigen (HPA) polymorphisms -1, -3 and -5 with HIV/HCV coinfection. In this study were included 60 HIV/HCV-coinfected patients from the Sao Paulo State health service centers. Data reported by Verdichio-Moraes et al (2009) were used as the non-infected and HCV monoinfected groups to evaluate the association of HPA -1, -3 and -5 in HIV/VHC coinfected patients. HPA genotyping was performed in 60 HIV/HCV coinfected patients by PCR-SSP or PCR-RFLP. HIV subtyping and HCV genotyping was performed by RT-PCR followed sequencing. The data analyses were performed using the c2 test or Fisher’s Exact Test and the logistic regression model. HIV/HCV coinfected patients presented HCV either genotype 1 (78.3%) or non-1 (21.7%) and HIV either subtype B (85.0%) or non-B (15%). The HPA-1a/1b genotype was more frequent (p<0.05) in HIV/HCV coinfection than in HCV monoinfection and the allelic frequency of HPA-5b in the HIV/HCV coinfected patients was lower (P<0.05) than in HCV monoinfected cases and non-infected individuals. These data suggest that HIV presence may have influenced the interaction of HCV with platelets. On the other hand, HPA-5a/5b was more frequent (p<0.05) in HIV/HCV coinfected and HCV monoinfected groups than in the non-infected individuals, suggesting that this platelet genotype is related to HCV infection, regardless of HIV presence. Results suggest that the HPA profile in HIV/HCV coinfected individuals differs from the one of both HCV monoinfected and non-infected population...