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Updated: Mar 25, 2026

Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
Published on: June 21, 2018
A functional insertion/deletion polymorphism in the IL1A gene is associated with decreased risk of breast cancer
1Department of Laboratory Medicine, the People's Hospital of Leshan, Leshan, Sichuan, China.
Abstract:
The insertion/deletion polymorphism (rs3783553 TTCA/-) in the 3' untranslated region of interleukin-1A (IL1A) has been studied intensively and has been shown to affect tumor risk. We studied the frequency of the IL1A gene polymorphism rs3783553 and evaluated its relationship with breast cancer (BC). A hospital-based case-control study comprising 228 patients with histologically confirmed BC and 241 healthy subjects was conducted. Polymerase chain reaction was used to detect the IL1A rs3783553 polymorphism. The ins/ins (ttca/ttca) genotype was significantly associated with a decreased risk of BC compared with the del/del (-/-) genotype (OR = 0.48, 95% CI = 0.27-0.85). Moreover, the ins (ttca) allele distribution between cases and controls was significantly different from the del (-) allele distribution (OR = 0.74, 95% CI = 0.57-0.96). Thus, the rs3783553 polymorphism is associated with a decreased incidence of breast cancer.
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