title: The Possible Role of TLR2 in Chronic Hepatitis B Patients with Precore Mutation.
abstract: Recognition mechanisms of innate immune response help to improve immunotherapeutic strategies in HBeAg-negative chronic hepatitis B (CHB). Toll-like receptor 2 (TLR2) is an important component of innate immunity. In this study, the frequency of precore mutations of the hepatitis B virus (HBV) and serum TLR2 were evaluated in CHB patients. Fifty-one patients with chronic hepatitis B, negative for HBeAg and detectable HBV DNA, were examined for the presence of mutations in pre-core region of HBV genome by direct sequencing. Serum TLR2 was measured by enzyme-linked immunosorbent assay. Interactions of truncated HBeAg and TLR2 proteins were evaluated with molecular docking software. The G1896A pre-core mutation were detected in 29 (57%) which was significantly associated with higher concentration of serum TLR2 in comparison with patients without this mutation (4.8 ± 2.9 versus 3.4 ± 2.2 ng/mL, P = 0.03). There was also a significant correlation between serum ALT and TLR-2 (r = 0.46; P = 0.01). Docking results illustrated residues within the N-terminus of truncated HBeAg and TLR2, which might facilitate the interaction of these proteins. These findings showed the dominance of G1896A pre-core mutation of HBV variants in this community which was correlated with serum TLR2. Moreover TLR2 is critical for induction of inflammatory cytokines and therefore ALT elevation.
authors.affiliation: Department of Modern Sciences and Technologies, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Malihe
authors.initials: M
authors.lastname: Moradzadeh
authors.forename: Sirous
authors.initials: S
authors.lastname: Tayebi
authors.forename: Hossein
authors.initials: H
authors.lastname: Poustchi
authors.forename: Kourosh
authors.initials: K
authors.lastname: Sayehmiri
authors.forename: Parisa
authors.initials: P
authors.lastname: Shahnazari
authors.forename: Elnaz
authors.initials: E
authors.lastname: Naderi
authors.forename: Ghodratollah
authors.initials: G
authors.lastname: Montazeri
authors.forename: Ashraf
authors.initials: A
authors.lastname: Mohamadkhani