Sains Malaysiana 55(6)(2026): 1045-1055
http://doi.org/10.17576/jsm-2026-5506-09
Analysis of IFN-
+874 T/A Gene Polymorphism and Serum IFN-
Levels
in Chronic Hepatitis B and Liver Cirrhosis Patients
(Analisis Polimorfisme Gen IFN-
+874 T/A dan Tahap IFN-
Serum pada Pesakit Hepatitis B Kronik dan
Sirosis Hati)
DEVI RAHMADHONA1,2,
BAMBANG PURWANTO3, HARIS WIDITA4, HARI BASUKI NOTOBROTO5 & ARYATI6,7,*
1Doctoral
Program of Medical Science, Faculty of Medicine, Universitas Airlangga,
Surabaya, Indonesia
2Faculty
of Medicine, Universitas Mataram, Mataram, Indonesia
3Department
of Physiology and Medical Biochemistry, Faculty of Medicine, Universitas
Airlangga, Surabaya, Indonesia
4Department of Internal Medicine, West Nusa
Tenggara General Hospital, Mataram, Indonesia
5Department of Epidemiology,
Biostatistics, Population Studies and Health Promotion, Faculty of Public
Health, Universitas Airlangga, Surabaya, Indonesia
6Department
of Clinical Pathology, Faculty of Medicine, Universitas Airlangga, Surabaya, Indonesia
7Dr. Soetomo General Academic Hospital, Surabaya, Indonesia
Diserahkan: 5 Januari 2026/Diterima: 5 Jun 2026
Abstract
Interferon
gamma (IFN-γ) plays a central role in antiviral immunity and
immune-mediated liver injury in chronic hepatitis B virus (HBV) infection.
Genetic polymorphism affecting IFN-γ production may influence disease susceptibility
and progression. This study investigated
the association between the IFN-γ +874 T/A polymorphism, serum IFN-γ levels,
and clinical outcomes in patients with chronic hepatitis B (CHB) and liver
cirrhosis (LC). A total of 125 patients were enrolled, including 88 with CHB
and 37 with LC. IFN-γ +874 T/A polymorphism was analysed using PCR–RFLP,
and serum IFN-γ levels were measured. Genotype and allele distributions
were compared between groups, and genotype-specific differences in serum IFN-γ
were evaluated. The AA genotype and A allele were the most prevalent in both CHB
and LC groups, with no significant differences in genotype or allele
distributions. In contrast, serum
IFN-γ level were significantly higher in patients with LC compared with
those with CHB (p=0.018). Stratified analysis showed no significant differences
in IFN-γ levels among genotypes within each group; however, LC patients
carrying the AA genotypes had significantly higher IFN-γ levels than AA
carriers in the CHB group (p=0.047). In conclusion, elevated serum IFN-γ
levels are associated with advanced liver disease in chronic HBV infection,
whereas IFN-γ +874 T/A polymorphism alone does not independently predict
progression from CHB to LC. These finding underscore the importance of
disease-stage-dependent immune dysregulation HBV-related liver disease.
Keywords: Chronic hepatitis B; IFN-γ +874 T/A; liver cirrhosis; serum IFN-γ
Abstrak
Interferon gama (IFN-γ) memainkan peranan utama dalam imuniti antivirus dan kecederaan hepar yang dimediasi oleh sistem imun dalam jangkitan virus hepatitis B kronik (HBV). Polimorfisme genetik yang mempengaruhi penghasilan IFN-γ mungkin mempengaruhi kerentanan terhadap penyakit dan perkembangan penyakit. Kajian ini bertujuan untukmenilai hubunganantara polimorfisme IFN-γ +874 T/A, paras IFN-γ serum dan hasil klinikal dalam kalangan pesakit hepatitis B kronik (CHB) dan sirosis hati (LC). Seramai 125 pesakit telah direkrut, terdiri daripada 88 pesakit CHB dan 37 pesakit LC. Polimorfisme IFN-γ +874 T/A dianalisis menggunakan kaedah PCR-RFLP, manakala paras IFN-γ serum diukur. Taburan genotip dan alel dibandingkanantara kumpulandan perbezaan paras IFN-γ serum mengikut genotip turut dinilai. Genotip AA dan alel A merupakan yang paling kerap ditemui dalam kedua-dua kumpulan CHB dan LC tanpa perbezaan signifikan dalam taburan genotip atau alel. Sebaliknya, paras IFN-γ serum adalah lebih tinggi secara signifikan dalam kalangan pesakit LC berbanding CHB
(p=0.018). Analisis berstrata menunjukkan tiada perbezaan signifikan paras IFN-γ antara genotip dalam setiap kumpulan. Namun, pesakit LC yang membawa genotip AA mempunyai paras IFN-γ yang lebih tinggi signifikan berbanding pembawa genotip AA dalam kumpulan CHB (p=0.047). Kesimpulannya, peningkatan paras IFN-γ serum berkaitan dengan penyakit hepar yang lebih lanjut dalam jangkitan HBV kronik, manakala polimorfime IFN-γ
+874 T/A secara bersendirian tidak meramalkan perkembangan penyakit hati daripada CHB kepada sirosis hati. Penemuan ini menekankan kepentingan disregulasi imun yang bergantung pada peringkat penyakit dalam penyakit hepar berkaitan HBV.
Kata kunci: Hepatitis B kronik; IFN-γ +874 T/A; IFN-γ
serum; sirosis hati
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*Pengarang untuk surat-menyurat; email: aryati@fk.unair.ac.id