HLADQA1*05 Genotype and the Efficacy of Treatment With Infliximab in Chinese Population Crohn's Disease

Sixth Affiliated Hospital, Sun Yat-sen University (Other)
Overall Status
Not yet recruiting
CT.gov ID

Study Details

Study Description

Brief Summary

Crohn's disease (CD) is a chronic non-specific inflammatory disease of the intestine. Infliximab (IFX) is a kind of one of the anti-tumor necrosis factor agents (anti-TNF) and is the main clinical treatment drug for Crohn's disease, but approximately 30-50% of patients develop a secondary non-response to respond within one year. The main cause of secondary non-response failure is the formation of anti-IFX anti-drug antibodies (ADA). The human leukocyte antigen (HLA) gene is a complex allele that has been associated with susceptibility to a variety of diseases. Studies have shown that HLADQA105 allele carriage significantly increases the immunogenicity of anti-tumor necrosis factor agents (anti-TNF) and the risk of ADA formation, resulting in a significant reduction in the efficacy of IFX. Our previous retrospective study found an increased risk of ADA, IFX failure to respond and discontinuation in patients with HLADQA105 variants, and that IFX in combination with immunosuppression improved clinical outcomes in wild-type genotype patients, whereas combination therapy in patients with variant genotype did not optimize clinical outcomes significantly. Therefore, we believe that the impact of HLADQA105 on the efficacy of IFX in the Chinese population is unclear, and the combination of immunosuppressants in patients with variant HLADQA105 genotype remains to be validated due to insufficient sample size. We hypothesized that HLADQA105 wild-type CD patients would have better clinical remission when treated with IFX than HLADQA105 variant patients and that the combination of immunosuppressants would improve the outcome in wild-type patients but not in variant patients. By advancing this project, we hope to provide high quality evidence on the clinical use of IFX in Crohn's disease in the Chinese population and help physicians to be more selective in the use of IFX alone or in combination with azathioprine, or to switch treatment in a timely manner.

Condition or Disease Intervention/Treatment Phase
Phase 4

Study Design

Study Type:
Anticipated Enrollment :
976 participants
Intervention Model:
Parallel Assignment
Single (Outcomes Assessor)
Primary Purpose:
Official Title:
The Influence of HLADQA1*05 Genotype on Efficacy of Treatment With Infliximab in Chinese Population Crohn's Disease: a Multicenter, Prospective, Randomized, Controlled Study
Anticipated Study Start Date :
Apr 30, 2023
Anticipated Primary Completion Date :
May 31, 2026
Anticipated Study Completion Date :
Oct 31, 2026

Arms and Interventions

Arm Intervention/Treatment
Experimental: Infliximab

Infliximab monotherapy, the first dose of 5 mg/kg of this product is provided, followed by the same dose at weeks 2 and 6 after the first dose and every 8 weeks thereafter.

Drug: Infliximab
5mg/kg for the first dose, and the same dose at weeks 2 and 6 after the first dose and every 8 weeks thereafter. Treatment with single Infliximab or combined azathioprine, respectively.

Active Comparator: Infliximab+azathioprine

Infliximab was given in combination with azathioprine, and Infliximab dosing was the same as in the experimental group, with azathioprine at 1-2 mg/kg/d.

Drug: Azathioprine
azathioprine in combination with Infliximab, with a dose of 1-2 mg/kg/d.

Drug: Infliximab
5mg/kg for the first dose, and the same dose at weeks 2 and 6 after the first dose and every 8 weeks thereafter. Treatment with single Infliximab or combined azathioprine, respectively.

Outcome Measures

Primary Outcome Measures

  1. Clinical remission without corticosteroid use at 102 weeks [102 weeks]

    CDAI score below 150 and no systemic corticosteroids at any dose or Budesonide ≥ 3 weeks.

Secondary Outcome Measures

  1. Clinical response at 14 weeks [14 weeks]

    Decrease in CDAI score ≥70 or CDAI score <150

  2. Positive for ADA [102 weeks]

    Transient or persistent serum ADA concentration ≥ 10 AU/mL

  3. IFX Intensive Therapy [102 weeks]

    Includes increased doses and shorter cycles

  4. IFX Failure to Respond [102 weeks]

  5. Adverse drug events [102 weeks]

    Allergies, infusion reactions, infections, tumors, liver damage, bone marrow suppression, hair loss, etc.

  6. IFX discontinuation [102 weeks]

    Includes discontinuation due to IFX non-response or adverse events

Eligibility Criteria


Ages Eligible for Study:
18 Years and Older
Sexes Eligible for Study:
Accepts Healthy Volunteers:
Inclusion Criteria:
  • Participants with Crohn's disease who meet the diagnostic criteria of the Consensus Opinion on the Diagnosis and Treatment of Inflammatory Bowel Disease (Beijing, 2018); Meet the indications for IFX use; CDAI score of 220-450; age≥18 years, regardless of gender; Participants or family members able to understand the study protocol and willing to participate in this study by providing written informed consent
Exclusion Criteria:
  • NUDT 15 CT and TT genotypes; previous treatment with IFX and/or other anti-TNF biologics; Participants who are proposed to have given birth and/or breastfeeding in the 12 months; those with immunosuppressive intolerance or contraindications; concurrent chronic diseases or factors of other systems (including severe cardiopulmonary, hepatic and renal, neurological, psychiatric, rheumatic and immune diseases, alcoholism, drug dependence, other chronic active diseases and long-term hormonal or immunosuppressive drugs); Excluding infectious diseases (tuberculosis, etc.); Excluding tumor-related diseases (lymphoma, gastrointestinal tract tumors, etc.); any medical condition/combined surgery/medication/other clinically significant abnormal laboratory tests which, in the judgment of the investigator, may affect the results of the test; Known refusal or inability to follow protocol requirements for any reason (including planned clinical visits and examinations)

Contacts and Locations


No locations specified.

Sponsors and Collaborators

  • Sixth Affiliated Hospital, Sun Yat-sen University


None specified.

Study Documents (Full-Text)

None provided.

More Information


None provided.
Responsible Party:
Sixth Affiliated Hospital, Sun Yat-sen University
ClinicalTrials.gov Identifier:
Other Study ID Numbers:
  • 2023ZSLYEC-123
First Posted:
Apr 14, 2023
Last Update Posted:
Apr 14, 2023
Last Verified:
Apr 1, 2023
Studies a U.S. FDA-regulated Drug Product:
Studies a U.S. FDA-regulated Device Product:
Additional relevant MeSH terms:

Study Results

No Results Posted as of Apr 14, 2023