Bradykinin-degradating Enzymes Activities in Angiotensin-Converting Enzyme Inhibitors-associated Angioedema
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: Assay of Bradykinin-degradating enzymes..
- Who it may be relevant to
- Registry conditions: Angio-Oedema Caused by Angiotensin-Converting-Enzyme Inhibitor. Basic parameters: from 18 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- France
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Official title
Prognostic Value of the Bradykinin-degradating Enzymes Activities on the Relapse Risk of Angiotensin-Converting Enzyme Inhibitors-associated Angioedema
Overview
Angiotensin-Converting-Enzyme-inhibitors-dependent angioedema (ACEi-AE) is the most frequent form of bradykinin-mediated AE, with an estimated prevalence of 0.1% to 0.7%. These AE can be explained by the accumulation of bradykinin (BK), a peptide responsible for increase of vascular permeability: ACE inhibitors block ACE, the main inactivation pathway of the BK, thus extending its half-life. In spite of the the stopping of the drug, systematically performed in the case of ACEi-AE, up to 50% of patients relapsed within 6 months, with maximum risk in the first month after stopping. In addition, the discontinuation of these drugs represents a loss of chance for some patients, without clearly established mastocytic (or histaminic) or bradykinic etiology. At present there is no method to predict the risk of crisis recurrence in patients who have developed AE-IEC. The investigators hypothesize that the risk of relapse is associated with a decrease in the activity of BK degradation enzymes (including aminopeptidase P (APP), dipeptidyl peptidase-4 (DPP4), and ECA) that persists at the cessation of IEC.
Interventions
- Other Assay of Bradykinin-degradating enzymes.
Aminopeptidase P activity assay; Dipeptidyl peptidase IV activity assay; Angiotensin Converting Enzyme activity assay; MME gene polymorphisme exploration.
Primary outcome measures
- Prognostic Value of Bradykinin degradating enzymes [Time frame: Association between the activity of kinin-degrading enzymes (ECA, APP, DPP4) measured by enzyme methods, expressed in tertiles, and relapse at 6 months.]
Eligibility criteria
Inclusion criteria
- Men and women at least 18 years old
- Presenting AE secondary to treatment with Angiotensin Conversion Enzyme Inhibitors for less than 15 days, or an isolated AE (without superficial hives), which lasts at least 15 hours, and whose diagnosis is validated by the expert committee,
- Having signed informed and written consent
- And being affiliated with social security
Exclusion criteria
- Patient who had one or more AEs prior to IEC
- Hereditary or acquired deficiency of C1 inhibitor
- Subject with known mutation of the F12 or PLG gene Subject in times of exclusion from another research involving the human person type 1 or 2 Persons referred to in sections L1121-5 to L1121-8 of the public health code (pregnant woman, breastfeeding mother, person deprived of liberty, person subject to legal protection) subject that cannot be contacted in an emergency situation
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Observational model
- Cohort
Study locations
France · 4 centers
- Chu Grenoble Alpes — Grenoble
- CHRU de Lille _Hôpital Claude-Huriez — Lille
- AP-HP _St Antoine — Paris
- CHU de Rouen — Rouen
Identifiers
NCT: NCT04763577 · 38RC19.025 · 2020-A00775-34