The Distribution of Immunoglobulin Isotype in Polyclonal Hypergammaglobulinemia in Systemic and Autoimmune Diseases (ISOHYPE)

Centre Hospitalier Universitaire, Amiens

Status: Enrolling

Conditions: Polyclonal Hypergammaglobulinemia; Autoimmune Diseases

Study type: Observational

Funder types: Other

Identifiers

NCT06054373

PI2023_843_0116

Details and patient eligibility

About

Polyclonal hypergammaglobulinaemia is characterized by increased levels of immunoglobulins and is a common feature observed in various diseases such as autoimmune diseases, chronic infectious diseases or lymphoid hemopathy. Some autoimmune diseases such as systemic lupus erythematosus, rheumatoid arthritis or Sjögren's syndrome are frequently associated with polyclonal hypergammaglobulinaemia. Recent data have suggested that the distribution of immunoglobulin isotypes in polyclonal hypergammaglobulinaemia may be disease-specific. However, isotype repartition in polyclonal hypergammaglobulinaemia remains poorly understood.

The investigators will investigate the distribution of immunoglobulin isotype in patients with autoimmune disease and polyclonal hypergammaglobulinaemia. Moreover, the investigators will evaluate the isotype repartition as predictor of lymphoma or monoclonal gammopathy among patients with autoimmune diseases.

Enrollment: 150 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• All adult patients > 18 years old
• patients with one of the following diseases: systemic lupus erythematosus, rheumatoid arthritis, Sjögren's syndrome, autoimmune hepatitis, sarcoidosis or lymphoma.

Exclusion criteria

• Age < 18 years;
• chronic viral hepatitis;
• HIV infection, syphilis,
• tuberculosis