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The interferon receptor-1 promoter polymorphisms affect the outcome of Caucasians with HBeAg-negative chronic HBV infection
Timokratis Karamitros1,4, George Papatheodoridis2,3, Eleni Dimopoulou2, Maria-Vasiliki Papageorgiou2,3, Dimitrios Paraskevis1, Gkikas Magiorkinis1,4, Vana Sypsa1 andAngelos Hatzakis1,*
DOI: 10.1111/liv.12859
This article is protected by copyright. All rights reserved.
Issue
Cover image for Vol. 35 Issue 5
Liver International
Accepted Article (Accepted, unedited articles published online and citable. The final edited and typeset version of record will appear in future.)
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Author Information
Publication History
Author Information
1 Department of Hygiene and Epidemiology and Medical Statistics, Athens University Medical School, Athens, Greece
2 2nd Department of Internal Medicine, Hippokration General Hospital, Athens University Medical School, Athens, Greece
3 Academic Department of Gastroenterology, Laiko General Hospital, Athens University Medical School, Athens, Greece
4 Department of Zoology, University of Oxford, Oxford, United Kingdom
* Address correspondence:
Angelos Hatzakis, PhD, MD, MSc
Professor of Epidemiology and Preventive Medicine,
Department of Hygiene and Epidemiology and Medical Statistics, Athens University Medical School
75 Mikras Asias Street, GR-11527 Athens, Greece
Tel: (+30210)7462090
Fax: (+30210)7462190
e-mail: [email protected]
This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1111/liv.12859
Keywords:
Hepatitis Virus B;Interferon Receptorromoterolymorphisms
Abstract
Background/Aims
The outcome of HBeAg-negative chronic hepatitis B virus (HBV) patients who may remain in the inactive carrier state (IC) or progress to HBeAg-negative chronic hepatitis B may be affected by the host genetic profile. Genetic polymorphisms within the promoter but also the coding sequence of the interferon receptor 1 (INFAR1) gene have been associated with susceptibility to chronic HBV infection, but their role on the outcomes of HBeAg-negative patients has not been evaluated. We examined the association of INFAR1 promoter polymorphisms with the phase of chronic HBV infection in a demographically characterized Caucasian cohort of 183 consecutive HBeAg-negative chronic HBV patients.
Methods
Using a combination of conventional and allele-specific polymerase chain reactions, bidirectional sequencing and DNA-fragment analysis, we performed typing of three Single Nucleotide Polymorphisms (SNPs -568G/C, -408C/T, -3C/T) and one Variable Number Tandem Repeat (VNTR -77(GT)n) within the INFR1 promoter sequence.
Results
The genetic polymorphisms examined were found to be associated with the phase of HBeAg-negative chronic HBV patients. Using a multiple logistic regression model adjusting for age, gender and origin of the individuals, we found that patients with linked genotypes -408CT_-3CT were more likely to be ICs (OR=2.42 vs. CC, p=0.036). Also, given the partial linkage between SNP -568G/C and VNTR -77(GT)n, we found that linked genotypes -77(GT)n≤8/≤8_-568GC and -77(GT)n≤8/≤8_-568CC were detected more frequently among ICs (OR=11.69, p=0.005 and OR=7.56, p=0.001 vs. -77(GT)n>8/>8_-568GG, respectively).
Conclusions
These findings suggest that these genetic variations represent important factors associated with the clinical phase of HBeAg-negative chronic HBV infection.
This article is protected by copyright. All rights reserved.
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