An Extension Study of IMR-687 in Adult Patients With Sickle Cell Anemia

Phase 2

Active, not recruiting

• Conditions: Sickle Cell Disease
• Interventions: Drug: IMR-687

• Registration Number: NCT04053803
• Lead Sponsor: Imara, Inc.

Brief Summary

This is an open-label extension study of IMR-687 in adult patients who completed Imara's blinded Phase 2a study (IMR-SCD-102). The open-label extension study will evaluate long-term safety and tolerability.

Detailed Description

This is an open-label extension study of IMR-687 in adult patients with SCA who were previously participants in the Phase 2a study titled "A Phase 2a, Randomised, Double-Blind, Placebo-Controlled Study of IMR-687 in Adult Patients with Sickle Cell Anaemia (Homozygous HbSS or Sickle-β0 Thalassemia)."

This open-label extension study with IMR-687 will evaluate the long-term safety and tolerability of IMR 687 in adult SCA patients. Exploratory long-term PD parameters will also be examined.

Study Timeline

• Study Start: 2019-05-22
• Study First Submitted: 2019-07-18
• Study First Submitted QC: 2019-08-08
• Study First Posted: 2019-08-13
• Status Verified: 2022-03
• Last Update Submitted: 2022-03-02
• Last Update Posted: 2022-03-04
• Primary Completion: 2025-03
• Study Completion: 2025-03

Recruitment & Eligibility

• Status: ACTIVE_NOT_RECRUITING
• Sex: All
• Target Recruitment: 30

Inclusion Criteria

1. Completed Study IMR-SCD-102.
2. Female subjects must not be pregnant, not be breast feeding, and be highly unlikely to become pregnant. Male subjects must be unlikely to impregnate a partner.
3. Subjects must be capable of giving informed consent and reading and signing the informed consent form after the nature of the study has been fully explained to them
4. Subjects must be willing and able to complete all study assessments and procedures and to communicate effectively with the investigator and site staff.

Exclusion Criteria

1. Subjects with Hb >12.5 g/dL or <6 g/dL
2. Subjects with known active hepatitis B or hepatitis C, with active or acute event of malaria or who are known to be positive for human immunodeficiency virus (HIV)
3. eGFR <50 mL/min
4. AST/ALT > 3x the upper limit of normal

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Open Label	IMR-687	-

Primary Outcome Measures

Name	Time	Method
Proportion of patients with clinically significant abnormal vital signs	Baseline to Month 49	1. Blood pressure measured in mmHg; 2. Pulse measured in beats per minute; 3. Respiration rate measured in breaths per minutes; 4. Temperature as measured in degrees F0 or C0
Proportion of patients with adverse events and serious adverse events	Baseline to Month 49	1. Incidence of Adverse Events; 2. Incidence of Serious Adverse Events
Proportion of patients with changes in safety cardiac parameters	Baseline to Month 49	a. Changes in 12-lead ECG parameters that are clinically significant and measured in milliseconds (ms).; The parameters are: PR interval, QRS duration, QT interval, ST segment duration and T wave duration.
Proportion of patients with changes in clinical laboratory tests	Baseline to Month 49	a. Clinically significant changes in clinical laboratory tests including serum chemistry, serum hematology and urinalysis

Trial Locations

Locations (7)

Guy's and St Thomas Hospital CRF; 🇬🇧 London, United Kingdom

Royal London Hospital; 🇬🇧 London, United Kingdom

Bristol Haematology and Oncology Centre; 🇬🇧 Bristol, United Kingdom

University College London Hospital NHS Foundation Trust; 🇬🇧 London, United Kingdom

Baylor Scott & White Medical Center - Temple; 🇺🇸 Temple, Texas, United States

University of Connecticut Health Center; 🇺🇸 Farmington, Connecticut, United States

Foundation for Sickle Cell Disease Research; 🇺🇸 Hollywood, Florida, United States