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Mangone G, Serranti D, Bartolini E, Vigna V, Mastrangelo G, Ricci S, Trapani S, Azzari C, Resti M, Indolfi G. SNPs of the IFNL favour spontaneous clearance of HCV infection in children. Pediatr Res 2022; 91:1516-1521. [PMID: 33966053 DOI: 10.1038/s41390-021-01557-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 03/08/2021] [Accepted: 03/19/2021] [Indexed: 02/03/2023]
Abstract
BACKGROUND Both spontaneous and treatment-induced clearance of hepatitis C virus (HCV) in adults have been associated with genetic polymorphisms in the interferon-λ genes. The aim of the present study was to confirm the association between the rs12979860 and evaluate the association between the rs368234815 and the rs4803217 single-nucleotide polymorphisms (SNPs) of the interferon-λ genes and the outcome of the infection in children. METHODS Alleles and genotypes frequencies of 32 children, who presented spontaneous clearance of the virus and 135 children, with viral persistence were compared with ethnically matched controls obtained from the 1000 Genomes Project and the International HapMap Project databases. RESULTS The frequencies of the C/C genotype of rs12979860, the TT/TT of the rs368234815 and the A/C of the rs4803217 were higher in the clearance group than in children with viral persistence (C/C versus T/T + C/T odds ratio (OR): 2.6; 90% confidence intervals (CI): 1.3-5; p = 0.01; TT/TT versus ΔG/TT + ΔG/ΔG OR: 2.8; 90% CI: 1.4-5.5; p = 0.01; and A/A versus A/C OR: 8.3; 90% CI: 1.5-45.9; p = 0.017, respectively) and with the ethnically matched controls. CONCLUSIONS The rs12979860, the rs368234815 and the rs4803217 SNPs are associated with spontaneous clearance of HCV in children. IMPACT Innate immune system response has a key role in the outcome of vertically acquired HCV infection in children. The rs12979860, the rs368234815 and the rs4803217 SNPs are associated with spontaneous clearance of HCV in children. Interferons-λ activate the Janus kinase-Stat pathway, which in turn induces several interferon-stimulated genes, leading to suppression of HCV replication both in vivo and in vitro.
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Affiliation(s)
- Giusi Mangone
- Immunology Unit, Meyer Children's University Hospital of Florence, Firenze, Italy
| | - Daniele Serranti
- Paediatric and Liver Unit, Meyer Children's University Hospital of Florence, Firenze, Italy
| | - Elisa Bartolini
- Paediatric and Liver Unit, Meyer Children's University Hospital of Florence, Firenze, Italy
| | - Veronica Vigna
- Paediatric and Liver Unit, Meyer Children's University Hospital of Florence, Firenze, Italy
| | - Greta Mastrangelo
- Paediatric and Liver Unit, Meyer Children's University Hospital of Florence, Firenze, Italy.,Department NEUROFARBA, University of Florence, Firenze, Italy
| | - Silvia Ricci
- Department of Health Sciences, University of Florence, Firenze, Italy
| | - Sandra Trapani
- Paediatric and Liver Unit, Meyer Children's University Hospital of Florence, Firenze, Italy.,Department of Health Sciences, University of Florence, Firenze, Italy
| | - Chiara Azzari
- Immunology Unit, Meyer Children's University Hospital of Florence, Firenze, Italy.,Department of Health Sciences, University of Florence, Firenze, Italy
| | - Massimo Resti
- Department of Health Sciences, University of Florence, Firenze, Italy
| | - Giuseppe Indolfi
- Paediatric and Liver Unit, Meyer Children's University Hospital of Florence, Firenze, Italy. .,Department NEUROFARBA, University of Florence, Firenze, Italy.
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Waldenström J, Kåberg M, Alanko Blomé M, Widell A, Björkman P, Nilsson S, Hammarberg A, Weiland O, Nyström K, Lagging M. Absence of interferon-λ 4 enhances spontaneous clearance of acute hepatitis C virus genotypes 1-3 infection. Scand J Gastroenterol 2021; 56:855-861. [PMID: 34034600 DOI: 10.1080/00365521.2021.1925956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVES Absence of a functional interferon-λ 4 (IFN-λ4) gene (IFNL4) predicts spontaneous resolution of acute hepatitis C virus (HCV) infections in regions with a predominance of genotype 1, whereas variants of the inosine triphosphate pyrophosphatase (ITPase) gene (ITPA) entailing reduced activity associate with increased sustained virologic response rates following some therapeutic regimens. This study aimed at investigating the impact of IFNL4 on acute HCV genotype 2 or 3 infections, and whether ITPase activity influenced outcome. MATERIALS AND METHODS Two hundred and seven people who injected drugs (PWID) with documented anti-HCV seroconversion, and 57 PWID with reinfection with HCV were analyzed regarding IFNL4 (rs368234815 and rs12979860) and ITPA (rs1127354 and rs7270101), and longitudinally followed regarding HCV RNA. RESULTS The spontaneous clearance of HCV infection in anti-HCV seronegative PWID was enhanced when IFN-λ4 was absent (44% vs. 20% for IFNL4 TT/TTrs1368234815 and ΔGrs1368234815 respectively, p < .001; OR 3.2) across genotypes 1-3. The proportion lacking IFN-λ4 was further increased following resolution of repeated re-exposure to HCV (74% among re-infected participants who had cleared at least two documented HCV infections). ITPA genetic variants did not independently impact on the outcome, but among males lacking IFN-λ4, reduced ITPase activity markedly augmented the likelihood of resolution (65% vs. 29% for <100% and 100% ITPase activity, p = .006). CONCLUSIONS Absence of IFN-λ4 entails an enhanced likelihood of spontaneous resolution both following primary acute infection and repeated re-exposure to HCV across genotypes 1-3. Among men lacking IFN-λ4, reduced ITPase activity improved outcome.
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Affiliation(s)
- Jesper Waldenström
- Department of Infectious Diseases/Virology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Infectious Diseases, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Martin Kåberg
- Department of Medicine, Huddinge Division of Infection and Dermatology, Karolinska Institutet at Karolinska University Hospital, Stockholm, Sweden
| | | | - Anders Widell
- Department of Clinical Virology, Department of Translational Medicine, Lund University, Lund, Sweden
| | - Per Björkman
- Department of Clinical Infection Medicine, Lund University, Lund, Sweden
| | - Staffan Nilsson
- Department of Mathematical Sciences, Chalmers University of Technology, Sweden.,Department of Pathology and Genetics, Institute of Biomedicine, University of Gothenburg, Göteborg, Sweden
| | - Anders Hammarberg
- Department of Clinical Neuroscience, Centre for Psychiatry Research, Karolinska Institutet, Stockholm, Sweden.,Stockholm Centre for Dependency Disorders, Stockholm Health Care Services, Stockholm County Council, Stockholm, Sweden
| | - Ola Weiland
- Department of Medicine, Huddinge Division of Infection and Dermatology, Karolinska Institutet at Karolinska University Hospital, Stockholm, Sweden
| | - Kristina Nyström
- Department of Infectious Diseases/Virology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Clinical Microbiology, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Martin Lagging
- Department of Infectious Diseases/Virology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Clinical Microbiology, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
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3
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Pluta M, Pokorska-Śpiewak M, Aniszewska M, Lewandowski Z, Kowalik-Mikołajewska B, Marczyńska M. Pegylated interferon and ribavirin gone but not forgotten in the era of direct-acting antivirals. Minerva Pediatr (Torino) 2021; 74:23-30. [PMID: 33438851 DOI: 10.23736/s2724-5276.20.05881-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
BACKGROUND Therapy with pegylated interferon and ribavirin (PEG-IFN+RBV) for chronic hepatitis C (CHC) remains the only option available for children in many Eurasian and European countries. Our aim was to evaluate the influence of host and viral factors on response to IFN-based therapy to optimize it for those in whom directly acting antivirals (DAA) are currently unavailable. METHODS Seventeen vertically infected, treatment naive children (10 male and 7 female) aged 5-16 years with CHC underwent a course of PEG-IFN+RBV. The end point was sustained virologic response (SVR). Host and virus factors were divided into pre- and on-treatment predictors of response to therapy. RESULTS Eleven patients obtained SVR (64%), 4 were non-responders (23%), and 2 were relapsers (12%). Significant relationship was found between HCV RNA elimination and following variables: virus genotype and early virologic response (EVR) (P<0.037, P<0.029 respectively). Higher eradication rate was observed in patients infected with genotype 3 HCV (100% vs. 65% with genotype 1 or 4), and in those with undetectable HCV RNA by week 12 (88% vs. 66% with viremia). EVR was associated with SVR (83% vs. 0% in nonresponders; P<0.004). C allele of IL28B rs12979860 was a predictor of EVR (P<0.043). The SVR rates among CC, CT, and TT carriers were as follows: 75%, 67%, and 33%. CONCLUSIONS Detection of favorable HCV and IL28B genotype prior to commencement of PEG-IFN+RBV and continuing it in patients with EVR is of major importance for those in whom DAA are still unavailable.
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Affiliation(s)
- Magdalena Pluta
- Department of Children's Infectious Diseases, Medical University of Warsaw, Warsaw, Poland - .,Hospital of Infectious Diseases, Warsaw, Poland -
| | - Maria Pokorska-Śpiewak
- Department of Children's Infectious Diseases, Medical University of Warsaw, Warsaw, Poland.,Hospital of Infectious Diseases, Warsaw, Poland
| | - Małgorzata Aniszewska
- Department of Children's Infectious Diseases, Medical University of Warsaw, Warsaw, Poland.,Hospital of Infectious Diseases, Warsaw, Poland
| | | | - Barbara Kowalik-Mikołajewska
- Department of Children's Infectious Diseases, Medical University of Warsaw, Warsaw, Poland.,Hospital of Infectious Diseases, Warsaw, Poland
| | - Magdalena Marczyńska
- Department of Children's Infectious Diseases, Medical University of Warsaw, Warsaw, Poland.,Hospital of Infectious Diseases, Warsaw, Poland
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Aytekin FY, Barut HŞ, Rüstemoğlu A, Atay A, Günal Ö, Duygu F. Factors related to fatalities and clinical progression of Crimean-Congo hemorrhagic fever patients and the effects of IL 28-B gene polymorphism. Arch Virol 2019; 164:547-557. [PMID: 30478788 DOI: 10.1007/s00705-018-4106-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Accepted: 11/05/2018] [Indexed: 02/06/2023]
Abstract
Mortality rates of Crimean-Congo hemorrhagic fever (CCHF) vary from 5% to 80%. However, there is no clear information available about why this disease is fatal for some people while others recover. In this study, the factors related to fatalities and serious clinical progression of CCHF patients and the correlation between serious prognosis and IL 28-B gene polymorphism were investigated. The study included 107 patients with a preliminary diagnosis of CCHF, and the patients were found positive for CCHFV RNA based on polymerase chain reaction (PCR) analysis. The IL 28-B rs12979860 polymorphism was identified by PCR "restriction fragment length polymorphism" (PCR-RFLP) analysis using blood samples from the patients. In addition to the IL 28-B analysis results, a variety of data along with laboratory records obtained during the hospital stay were evaluated using statistical analysis. Of the 107 cases, nine were fatal (8.4%), while the other patients recovered and were discharged. Twenty-four patients had the CC genotype (22.43%), 64 had the CT genotype (59.81%), and 19 had the TT genotype (17.76%). Of the nine patients who died, three had the CC genotype (33.33%) and six had the CT genotype (66.67%). None of the patients who died had the TT genotype. Symptoms and findings of diarrhea, abdominal pain, hemorrhage, and rash were more common in fatal cases than in non-fatal cases. The IL 28-B rs12979860 polymorphism was not found to have a statistically significant correlation with fatality or symptoms indicating serious clinical progression in CCHF patients. As has been observed in previous studies, our study showed that leukocytosis, abdominal pain and diarrhea were more common in fatal cases.
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Affiliation(s)
- Feyza Yıldız Aytekin
- Department of Infectious Diseases and Clinical Microbiology, Ministry of Health-Giresun University Prof. Dr. A. Ilhan Özdemir Training and Research Hospital, Giresun, Turkey.
| | - Hüseyin Şener Barut
- Department of Infectious Diseases and Clinical Microbiology, Faculty of Medicine, Gaziosmanpasa University, Tokat, Turkey
| | - Aydın Rüstemoğlu
- Department of Medical Biology, Faculty of Medicine, Gaziosmanpasa University, Tokat, Turkey
| | - Ayfer Atay
- Department of Infectious Diseases and Clinical Microbiology, Bahçelievler State Hospital, Istanbul, Turkey
| | - Özgür Günal
- Department of Infectious Diseases and Clinical Microbiology, Samsun Training and Research Hospital, University of Health Science, Samsun, Turkey
| | - Fazilet Duygu
- Department of Infectious Diseases and Clinical Microbiology, Ankara Onkology Training and Research Hospital, University of Health Science, Ankara, Turkey
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