A study to Evaluate the Efficacy and Safety of Mitapivat in Subjects With Transfusion-Dependent Alpha- or Beta-Thalassemia (ENERGIZE-T)

Overview

Sponsor-declared trial summary

Key facts

Sponsor

Agios Pharmaceuticals Inc.

Participant type

Patients

Age range

18-64 years, 65+ years

Gender

Male and Female

Therapeutic area

Diseases [C] - Hemic and Lymphatic Diseases [C15]

Trial duration

30 Jul 2024 → ongoing

Decision date (initial)

2024-08-05

Transition trial

Yes

Low-intervention

No

Rare-disease indication

Yes

Vulnerable population

Yes

External identifiers

EU CT number

2024-512747-23-00

EudraCT number

2021-000212-34

ClinicalTrials.gov

NCT04770779

Trial design

CTIS Part I — objectives, methods, condition coding

Main objective

Scope: Others, Safety, Efficacy, Pharmacodynamic, Pharmacokinetic

To compare the effect of mitapivat versus placebo on transfusion burden in subjects with α- or β-transfusiondependent thalassemia (TDT)

Conditions and MedDRA coding

Transfusion-Dependent Alpha- or Beta-Thalassemia

Eligibility criteria

Principal inclusion / exclusion criteria as submitted by sponsor

Inclusion criteria 6

1. ≥18 years of age at the time of providing informed consent.
2. Documented diagnosis of thalassemia (β-thalassemia with or without α-globin gene mutations, HbE/β-thalassemia, or α-thalassemia/HbH disease) based on DNA analysis from the subject’s medical record. If this information is not available from the subject’s medical record, DNA analysis can be performed by a local laboratory during the Screening Period. If a local laboratory is unable to perform the test, results from the comprehensive α- and β-globin genotyping performed by the study central laboratory can be used.
3. Transfusion dependent, defined as 6 to 20 RBC units transfused and a ≤6-week transfusion-free period during the 24-week period before randomization.
4. If taking hydroxyurea, the hydroxyurea dose must be stable for ≥16 weeks before randomization.
5. Women of childbearing potential (WOCBP) must be abstinent of sexual activities that may induce pregnancy as part of their usual lifestyle or agree to use 2 forms of contraception, 1 of which must be considered highly effective, from the time of providing informed consent, throughout the study, and for 28 days after the last dose of study drug. The second form of contraception can be an acceptable barrier method.
6. Written informed consent before any study-related procedures are conducted and willing to comply with all study procedures for the duration of the study.

Exclusion criteria 19

1. Pregnant, breastfeeding, or parturient.
2. Documented history of homozygous or heterozygous HbS or HbC.
3. Prior exposure to gene therapy or prior bone marrow or stem cell transplantation.
4. Currently receiving treatment with luspatercept; the last dose must have been administered ≥36 weeks before randomization.
5. Currently receiving treatment with hematopoietic stimulating agents; the last dose must have been administered ≥36 weeks before randomization.
6. History of malignancy (active or treated) ≤5 years before providing informed consent, except for nonmelanomatous skin cancer in situ, cervical carcinoma in situ, or breast carcinoma in situ.
7. History of active and/or uncontrolled cardiac or pulmonary disease ≤6 months before providing informed consent, including but not limited to: a. New York Heart Association Class III or IV heart failure or clinically significant dysrhythmia b. Myocardial infarction or unstable angina pectoris; hemorrhagic, embolic, or thrombotic stroke; deep venous thrombosis; or pulmonary or arterial embolism c. Heart rate–corrected QT interval using Fridericia’s method ≥450 milliseconds (males) or ≥470 milliseconds (females), except for right or left bundle branch block d. Severe pulmonary fibrosis as defined by severe hypoxia, evidence of right-sided heart failure, and radiographic pulmonary fibrosis >50% e. Severe pulmonary hypertension as defined by severe symptoms associated with hypoxia, right-sided heart failure, and oxygen indicated.
8. Hepatobiliary disorders, including but not limited to: a. Liver disease with histopathological evidence of cirrhosis or severe fibrosis b. Clinically symptomatic cholelithiasis or cholecystitis (prior cholecystectomy is not exclusionary) c. History of drug-induced cholestatic hepatitis d. Aspartate aminotransferase >2.5 × upper limit of normal (ULN); unless due to hemolysis and hepatic iron deposition) and alanine aminotransferase >2.5 × ULN (unless due to hepatic iron deposition).
9. Estimated glomerular filtration rate <45 mL/min/1.73 m2 by Chronic Kidney Disease Epidemiology Collaboration creatinine equation.
10. Nonfasting triglycerides >440 mg/dL (5 mmol/L).
11. Active infection requiring systemic antimicrobial therapy at the time of providing informed consent. If antimicrobial therapy is required during the Screening Period, screening procedures should not be performed while antimicrobial therapy is being administered, and the last dose of antimicrobial therapy must be administered ≥7 days before randomization.
12. Positive test for hepatitis C virus (HCV) antibody (Ab) with evidence of active HCV infection, or positive test for hepatitis B surface antigen.
13. Positive test for HIV-1 Ab or HIV-2 Ab.
14. History of major surgery (including splenectomy) ≤6 months before providing informed consent and/or a major surgical procedure planned during the study.
15. Current enrollment or past participation (≤12 weeks before administration of the first dose of study drug or a time frame equivalent to 5 half-lives of the investigational treatment, whichever is longer) in any other clinical study involving an investigational treatment or device.
16. Receiving strong cytochrome P450 (CYP)3A4/5 inhibitors that have not been stopped for ≥5 days or a time frame equivalent to 5 half-lives (whichever is longer), or strong CYP3A4 inducers that have not been stopped for ≥4 weeks or a time frame equivalent to 5 half-lives (whichever is longer), before randomization.
17. Receiving anabolic steroids that have not been stopped for at least 4 weeks before randomization. Testosterone replacement therapy to treat hypogonadism is allowed; the testosterone dose and preparation must be stable for ≥12 weeks before randomization.
18. Known allergy, or other contraindication, to mitapivat or its excipients (microcrystalline cellulose, croscarmellose sodium, sodium stearyl fumarate, mannitol, magnesium stearate, and Opadry® II Blue [hypromellose, titanium dioxide, lactose monohydrate, triacetin, and FD&C Blue #2]).
19. Any medical, hematological, psychological, or behavioral condition(s) or prior or current therapy that, in the opinion of the Investigator, may confer an unacceptable risk to participating in the study and/or could confound the interpretation of the study data. Also excluded are: • Subjects who are institutionalized by regulatory or court order • Subjects with any condition(s) that could create undue influence (including but not limited to incarceration, involuntary psychiatric confinement, and financial or familial affiliation with the Investigator or Sponsor).

Endpoints

Primary and secondary outcome measures (English text)

Primary endpoints 1

1. Transfusion reduction response (TRR), defined as a ≥50% reduction in transfused red blood cell (RBC) units with a reduction of ≥2 units of transfused RBCs in any consecutive 12-week period through Week 48 compared with baseline

Investigational products

Investigational medicinal products (IMPs), comparators, placebo, auxiliary

Test 1

Placebo 1

Sponsors and contacts

Sponsor organisations, regulatory contacts, third parties

Agios Pharmaceuticals Inc.

Sponsor organisation

Agios Pharmaceuticals Inc.

Address

88 Sidney Street

City

Cambridge

Postcode

02139-4137

Country

United States

Scientific contact point

Organisation

Agios Pharmaceuticals Inc.

Contact name

Scientific Communications

Public contact point

Organisation

Agios Pharmaceuticals Inc.

Contact name

Scientific Communications

Third parties 13

Locations

8 EU/EEA countries · 30 investigational sites

By country

Investigational sites

Country notifications

Trial-start, recruitment-start, end and early-termination notifications submitted per Member State

Results and documents

Annex IV summary of results, Annex V layperson summary, and all documents registered in CTIS for this trial

Documents 59 files

Public protocol annexes, IB summaries, regulatory submissions and post-authorisation documents registered in CTIS.

Application history

4 submissions — initial application plus substantial / non-substantial modifications