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Clinical Trial Details — Status: Terminated

Administrative data

NCT number NCT04679311
Other study ID # 202002126
Secondary ID
Status Terminated
Phase Phase 2
First received
Last updated
Start date December 22, 2020
Est. completion date January 31, 2023

Study information

Verified date February 2024
Source Washington University School of Medicine
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

Angiotensin Converting Enzyme (ACE) inhibitors are among the most important and widely prescribed drugs. They reduce the morbidity and mortality associated with high blood pressure, heart disease, and kidney disease. Unfortunately, their use carries the risk of causing life-threatening airway swelling in some patients. There is currently no treatment for this condition. A novel treatment approach that may reduce or completely reverse the swelling will be tested.


Description:

The investigators will test the hypothesis that treatment with fresh frozen plasma that contains high levels of ACE activity will increase serum ACE activity and thereby cause the degradation of mediators of ACE inhibitor-induced angioedema, such as bradykinin and substance P, resulting in a shortening of the course of ACE inhibitor-induced angioedema. 16 patients with ACE inhibitor-induced angioedema will be randomized 1:1 to treatment with either 2 units of fresh frozen plasma that has been preselected for high ACE activity content (≥50 U/L) or an equal volume of normal saline. A baseline assessment of the severity of the angioedema will be performed and baseline serum levels of ACE activity will be determined. The severity of angioedema will be assessed and serum levels of ACE activity will be determined at specific intervals after each subject is treated.


Recruitment information / eligibility

Status Terminated
Enrollment 2
Est. completion date January 31, 2023
Est. primary completion date January 31, 2023
Accepts healthy volunteers No
Gender All
Age group 18 Years and older
Eligibility Inclusion Criteria: - Males and females 18 years of age or older - Must currently be on ACE inhibitor therapy and have received a dose within 36 hours - Presenting with moderate to severe angioedema affecting the upper aerodigestive tract (face, lips, cheeks, tongue, soft palate/uvula, pharynx, and larynx). The severity of the angioedema attack will be determined by the subject's worst severity rating at baseline among 4 clinical domains (difficulty breathing, difficulty swallowing, voice changes, and tongue swelling) based on a clinically validated angioedema severity scale29 (Table) - Presenting with ACE inhibitor-induced angioedema within 12 hours after onset - All females must have a locally obtained negative pregnancy test prior to administration of the study drug. Those who have had a total hysterectomy, bilateral oophorectomy, or are two years post-menopausal do not require a pregnancy test. - Must be able to provide written informed consent to participate in the study to fulfill all study requirements Exclusion Criteria: - Pregnancy and/or breast feeding - Patients with angioedema that is likely due to causes other than ACE inhibitors, including hereditary angioedema, acquired angioedema, and allergic angioedema (food, insect bite or sting with clear response to anti-allergy medications) - Patients exhibiting acute urticaria - Evident clinical response to glucocorticoids, antihistamines, or epinephrine - A family history of recurrent angioedema - Documented intolerance to plasma - Documented congenital deficiency of immunoglobulin A in the presence of anti-immunoglobulin A antibodies - Patients with heart failure of the severity that precludes safe transfusion of High ACE activity plasma - Patients with acute pulmonary edema - Patients with morbid obesity as defined by BMI>40; morbidly obese patients have a higher volume of blood needing higher amounts of plasma and therefore will be excluded from this pilot study - Opinion of the investigator that the patient would not be a good candidate - Participation in a clinical study in the past 30 days

Study Design


Related Conditions & MeSH terms

  • Angioedema
  • Angioedema Caused by Angiotensin-Converting-Enzyme Inhibitor

Intervention

Biological:
High ACE Activity Fresh Frozen Plasma
Subjects will be treated with fresh frozen plasma that has been preselected for ACE activity content of = 50 U/L
Other:
Normal Saline
Subjects will be treated with normal saline 500 cc

Locations

Country Name City State
United States Barnes-Jewish Hospital Saint Louis Missouri

Sponsors (1)

Lead Sponsor Collaborator
Washington University School of Medicine

Country where clinical trial is conducted

United States, 

References & Publications (1)

Chen SX, Hermelin D, Weintraub SJ. Possible donor-dependent differences in efficacy of fresh frozen plasma for treatment of ACE inhibitor-induced angioedema. J Allergy Clin Immunol Pract. 2019 Jul-Aug;7(6):2087-2088. doi: 10.1016/j.jaip.2019.02.027. Epub 2019 Mar 2. No abstract available. — View Citation

Outcome

Type Measure Description Time frame Safety issue
Primary Determine if Treatment With 2 Units of Fresh Frozen Plasma That Contains = 50 U/L of ACE Activity Increases Serum ACE Activity The subjects' serum ACE activity will be assessed prior to treatment and 30 minutes after treatment and compared to determine if the treatment increases serum ACE activity Compare serum ACE activity before treatment and 30 minutes after treatment
Secondary Determine How Treatment Affects the Severity of Angioedema Using a Published Validated Clinical Rating Scale The severity of the the subjects' angioedema will be assessed using a published validated clinical rating scale before treatment and at 30 minutes, 2 hours, and 8 hours after treatment Compare angioedema severity before treatment and 30 minutes, 2 hours, and 8 hours after treatment
Secondary Sustained Change in Serum ACE Activity With Treatment Determine if treatment results in a sustained change in ACE activity levels Compare serum ACE activity before treatment and at 2 hours and 8 hours after treatment