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Updated: May 31, 2026

Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
Published on: June 21, 2018
The association between the PTPN22 C1858T polymorphism and systemic sclerosis: a meta-analysis
Young Ho Lee1, Sung Jae Choi, Jong Dae Ji
1Division of Rheumatology, Department of Internal Medicine, Korea University Anam Hospital, Korea University College of Medicine, 126-1 Anam-dong 5-ga, Seongbuk-gu, Seoul 136-705, Korea. lyhcgh@korea.ac.kr
The PTPN22 C1858T gene variant increases systemic sclerosis (SSc) risk, particularly in Europeans. This polymorphism is linked to anti-centromere antibody-positive SSc but not anti-topoisomerase antibody-positive SSc.
Area of Science:
- Genetics
- Immunology
- Rheumatology
Background:
- Systemic sclerosis (SSc) is an autoimmune disease with complex genetic underpinnings.
- The protein tyrosine phosphatase nonreceptor 22 (PTPN22) gene is a significant contributor to autoimmune disease susceptibility.
- The PTPN22 C1858T polymorphism (rs2476601) has been implicated in various autoimmune conditions.
Purpose of the Study:
- To investigate the association between the PTPN22 C1858T polymorphism and susceptibility to systemic sclerosis (SSc) across diverse ethnic groups.
- To determine if this polymorphism influences SSc risk in relation to specific autoantibody profiles (ACA and ATA).
Main Methods:
- A comprehensive meta-analysis was performed, pooling data from twelve comparative studies.
- The meta-analysis included a total of 4,367 SSc patients and 4,771 healthy control subjects.
- Stratified analyses were conducted based on ethnicity and autoantibody status.
Main Results:
- The PTPN22 1858T allele was significantly associated with an increased risk of SSc overall (OR 1.169, P=0.004).
- This association was particularly strong in European populations (OR 1.147, P=0.013) and specifically in anti-centromere antibody (ACA)-positive Europeans (OR 1.220, P=0.009).
- No significant association was observed between the PTPN22 1858T allele and anti-topoisomerase antibody (ATA)-positive SSc in Europeans (P=0.083). The T allele prevalence was notably lower in African Americans (1.5%) compared to Europeans (8.2%).
Conclusions:
- The PTPN22 C1858T polymorphism is a confirmed risk factor for systemic sclerosis (SSc) susceptibility.
- The association is significant in European populations and linked to the presence of anti-centromere antibodies.
- Ethnic variations in PTPN22 1858T allele frequency highlight the importance of population-specific genetic factors in SSc pathogenesis.
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