Research of Biomarkers Associated With the Diagnosis and Severity of Bradykinin Angioedema (BRADYDIAG)

University Hospital, Lille

Status

Enrolling

Conditions

Angio Edema

Treatments

Other: Biobanking

Study type

Observational

Funder types

Other

Identifiers

NCT04963634

2020_59

2020-A03306-33 (Other Identifier)

Details and patient eligibility

About

The unpredictable nature of the attacks is one of the essential characteristics of bradykinin angioedema. The two main difficulties for physicians managing a patient with bradykinin angioedema are to make the diagnosis and anticipate the severity.

Biomarkers can be used to diagnose, guide treatment, or predict the severity of a disease. However, the identification of biomarkers is currently difficult in bradykinin both for diagnosis and prognosis. While measurement of C4 and C1 inhibitor (quantitative and functional assays) allows the diagnosis of bradykinin angioedema due to C1 inhibitor deficiency, whether genetic or acquired, many patients with normal C1 inhibitor bradykinin angioedema, either hereditary or acquired, are still difficult to diagnose. For patients with hereditary angioedema with C1-inhibitor deficiency, there is no biomarker currently available to predict the severity. Any biomarker that could improve the diagnosis on the one hand, and improve the prediction of the frequency and severity of the response to treatment on the other hand, would obviously be extremely useful. The aim of our study is to assess the existence possible biomarkers for diagnosis and prognosis of bradykinin angioedema.

Enrollment

110 estimated patients

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Group 1 : Patients with bradykinin angioedema
Patient with biologically proven hereditary angioedema with C1 inhibitor deficiency,
Or a patient with bradykinin angioedema related to a plasminogen or factor XII mutation,
Or patients with bradykinin angioedema related to ACE inhibitors or ARB2,
Or patient with acquired bradykinin angioedema due to C1 inhibitor deficiency,
Age > or = 18 years with the capacity to understand the requirements of the study and to give a non-opposition
Having a blood collection scheduled as part of routine care
Being insured by social security

Group 2 : Patients with histamine-mediated angioedema

Patient with idiopathic histamine angioedema as determined by the referring physician
Age > or = 18 years with the capacity to understand the requirements of the study and to give a non-opposition
Having a blood collection scheduled as part of routine care
Being insured by social security

Exclusion criteria