Please use this identifier to cite or link to this item: http://repositorio.ufpa.br/jspui/handle/2011/4515
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Type: Artigo de Periódico
Issue Date: 2013
Authors: VASCONCELOS, Janaina Mota de
MÓIA, Lizomar de Jesus Maués Pereira
AMARAL, Ivanete do Socorro Abraçado
MIRANDA, Esther Castello Branco Mello
TAKESHITA, Louise Yukari
OLIVEIRA, Layanna Freitas de
MENDES, Lilian de Araújo Melo
SASTRE, Danuta
TAMEGÃO-LOPES, Bruna Pedroso
PEDROZA, Larysse Santa Rosa de Aquino
SANTOS, Sidney Emanuel Batista dos
SOARES, Manoel do Carmo Pereira
ARAÚJO, Marialva Tereza Ferreira de
BANDEIRA, Camila Lucas
SILVA, Adriana Maria Paixão de Sousa da
MEDEIROS, Zilene Lameira de
SENA, Leonardo dos Santos
DEMACHKI, Samia
SANTOS, Eduardo José Melo dos
Title: Association of killer cell immunoglobulin-like receptor polymorphisms with chronic hepatitis C and responses to therapy in Brazil
Citation: VASCONCELOS, Janaina Mota de et al. Association of killer cell immunoglobulin-like receptor polymorphisms with chronic hepatitis C and responses to therapy in Brazil. Genetics and Molecular Biology, São Paulo, v. 36, n. 1, p. 22-27, 2013. Disponível em: <http://www.scielo.br/pdf/gmb/v36n1/a04v36n1.pdf>. Acesso em: 10 dez. 2013. <http://dx.doi.org/10.1590/S1415-47572013000100004>.
Abstract: Soroprevalence for Hepatitis C virus is reported as 2.12% in Northern Brazil, with about 50% of the patients exhibiting a sustained virological response (SVR). Aiming to associate polymorphisms in Killer Cell Immunoglobulin-like Receptors (KIR) with chronic hepatitis C and therapy responses we investigated 125 chronic patients and 345 controls. Additionally, 48 ancestry markers were genotyped to control for population stratification. The frequency of the KIR2DL2 and KIR2DL2+HLA-CAsp80 gene and ligand was higher in chronic infected patients than in controls (p < 0.0009, OR = 3.4; p = 0.001, OR = 3.45). In fact, KIR2DL3 is a weaker inhibitor of NK activity than KIR2DL2, which could explain the association of KIR2DL2 with chronic infection. Moreover, KIR2DS2 and KIR2DS2+HLA-CAsp80 (p < 0.0001, OR = 2.51; p = 0.0084, OR = 2.62) and KIR2DS3 (p < 0.0001; OR = 2.57) were associated with chronic infection, independently from KIR2DL2. No differences in ancestry composition were observed between control and patients, even with respect to therapy response groups. The allelic profile KIR2DL2/KIR2DS2/KIR2DS3 was associated with the chronic hepatitis C (p < 0.0001; OR = 3). Furthermore, the patients also showed a higher mean number of activating genes and a lower frequency of the homozygous AA profile, which is likely secondary to the association with non-AA and/or activating genes. In addition, the KIR2DS5 allele was associated with SVR (p = 0.0261; OR = 0.184).The ancestry analysis of samples ruled out any effects of population substructuring and did not evidence interethnic differences in therapy response, as suggested in previous studies.
Keywords: Hepacivirus
Antígenos HLA-C
KIR
Hepatite C
KIR2DL2
ISSN: 1415-4757
Appears in Collections:Artigos Científicos - ICB
Artigos Científicos - FAMED/ICS

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