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Review paper

Interleukin-8 heterozygous polymorphism (-251 T/A and +781 C/T) increases the risk of Helicobacter pylori-infection gastritis in children: a case control study

By
Dr Supriatmo Orcid logo ,
Dr Supriatmo
Contact Dr Supriatmo

Department of Child Health, School of Medicine, Universitas Sumatera Utara, Medan, Indonesia

Gontar Alamsyah Siregar ,
Gontar Alamsyah Siregar

Department of Internal Medicine, School of Medicine, Universitas Sumatera Utara, Medan, Indonesia

Iqbal Pahlevi Adeputra Nasution ,
Iqbal Pahlevi Adeputra Nasution

Department of Surgery, School of Medicine, Universitas Sumatera Utara, Medan, Indonesia

Oke Rina Ramayani
Oke Rina Ramayani

Department of Child Health, School of Medicine, Universitas Sumatera Utara, Medan, Indonesia

Abstract

Aim
To investigate the effects of interleukin-8 (IL-8)-251 T/A and +781 C/T polymorphism on the risk of Helicobacter pyloriinfection gastritis in children, and the IL-8 level of children with or without gastritis H. pylori infection according to polymorphism.
Methods
This prospective, case control clinical study included 64 children 2-18 years old. A disease group (32 gastritis patients with H. pylori-infection) was compared with a control group (32 gastritis patients without H. pylori infection). Demographic characteristics of patients were taken by a questionnaire; gastritis was confirmed by gastroscopy, H. pylori infection was confirmed with rapid urease test. Serum IL-8 level was measured by ELISA, and IL-8-251 T/A and +781 C/T polymorphisms were analysed by RT-PCR. Demographic characteristics, IL-8 level, polymorphism of patients, and IL-8 level according to polymorphisms were compared between the groups.
Results
Children with tobacco exposure were associated with an increased risk of H. pylori-infection gastritis by 3.4-fold. There was a higher IL-8 level in the disease group compared to the control group. The disease group with IL-8-251 AT polymorphism had a higher risk compared to TT polymorphism by 8.7-fold, and with IL-8 +781 CT polymorphism had a higher risk compared to CC polymorphism by 10.7-fold. Children in the disease group with IL-8-251 AT and TT, and +781 CT and CC polymorphisms produced a higher IL-8 level than the control group in respective polymorphisms.
Conclusion
Children with H. pylori-infection gastritis have higher IL-8 production. There was an increased risk of developing H. pylori-infection in heterozygous-251 AT and +781 CT.

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