Trial Outcomes & Findings for A Study of IMR-687 in Subjects With Beta Thalassemia (NCT NCT04411082)

NCT ID: NCT04411082

Last Updated: 2025-05-15

Results Overview

Incidence and severity of Adverse Events Incidence and severity of Serious Adverse Events

Recruitment status

TERMINATED

Study phase

PHASE2

Target enrollment

122 participants

Primary outcome timeframe

Baseline to Week 40

Results posted on

2025-05-15

Participant Flow

Participant milestones

Participant milestones
Measure
TDT High Dose
TDT High dose
TDT Low Dose
TDT Low dose
TDT Placebo
TDT Placebo
NTDT High Dose
NTDT High dose
NTDT Low Dose
NTDT Low dose
NTDT Placebo
NTDT Placebo
Overall Study
STARTED
29
25
20
24
12
12
Overall Study
COMPLETED
18
16
16
10
8
6
Overall Study
NOT COMPLETED
11
9
4
14
4
6

Reasons for withdrawal

Withdrawal data not reported

Baseline Characteristics

A Study of IMR-687 in Subjects With Beta Thalassemia

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
TDT High Dose
n=29 Participants
TDT High dose
TDT Low Dose
n=25 Participants
TDT Low dose
TDT Placebo
n=20 Participants
TDT Placebo
NTDT High Dose
n=24 Participants
NTDT High dose
NTDT Low Dose
n=12 Participants
NTDT Low dose
NTDT Placebo
n=12 Participants
NTDT Placebo
Total
n=122 Participants
Total of all reporting groups
Age, Continuous
31.7 Years
STANDARD_DEVIATION 12.06 • n=5 Participants
30.0 Years
STANDARD_DEVIATION 9.95 • n=7 Participants
31.3 Years
STANDARD_DEVIATION 8.57 • n=5 Participants
34.1 Years
STANDARD_DEVIATION 12.64 • n=4 Participants
28.5 Years
STANDARD_DEVIATION 8.21 • n=21 Participants
36.0 Years
STANDARD_DEVIATION 9.56 • n=8 Participants
31.9 Years
STANDARD_DEVIATION 10.69 • n=8 Participants
Sex: Female, Male
Female
15 Participants
n=5 Participants
15 Participants
n=7 Participants
9 Participants
n=5 Participants
10 Participants
n=4 Participants
6 Participants
n=21 Participants
8 Participants
n=8 Participants
63 Participants
n=8 Participants
Sex: Female, Male
Male
14 Participants
n=5 Participants
10 Participants
n=7 Participants
11 Participants
n=5 Participants
14 Participants
n=4 Participants
6 Participants
n=21 Participants
4 Participants
n=8 Participants
59 Participants
n=8 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=8 Participants
0 Participants
n=8 Participants
Race (NIH/OMB)
Asian
5 Participants
n=5 Participants
7 Participants
n=7 Participants
4 Participants
n=5 Participants
4 Participants
n=4 Participants
3 Participants
n=21 Participants
4 Participants
n=8 Participants
27 Participants
n=8 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=8 Participants
0 Participants
n=8 Participants
Race (NIH/OMB)
Black or African American
1 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
1 Participants
n=21 Participants
0 Participants
n=8 Participants
2 Participants
n=8 Participants
Race (NIH/OMB)
White
19 Participants
n=5 Participants
17 Participants
n=7 Participants
14 Participants
n=5 Participants
17 Participants
n=4 Participants
7 Participants
n=21 Participants
6 Participants
n=8 Participants
80 Participants
n=8 Participants
Race (NIH/OMB)
More than one race
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=8 Participants
0 Participants
n=8 Participants
Race (NIH/OMB)
Unknown or Not Reported
4 Participants
n=5 Participants
1 Participants
n=7 Participants
2 Participants
n=5 Participants
3 Participants
n=4 Participants
1 Participants
n=21 Participants
2 Participants
n=8 Participants
13 Participants
n=8 Participants
Region of Enrollment
United Kingdom
1 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
2 Participants
n=4 Participants
0 Participants
n=21 Participants
1 Participants
n=8 Participants
4 Participants
n=8 Participants
Region of Enrollment
Malaysia
4 Participants
n=5 Participants
6 Participants
n=7 Participants
4 Participants
n=5 Participants
3 Participants
n=4 Participants
3 Participants
n=21 Participants
2 Participants
n=8 Participants
22 Participants
n=8 Participants
Region of Enrollment
Greece
9 Participants
n=5 Participants
2 Participants
n=7 Participants
1 Participants
n=5 Participants
5 Participants
n=4 Participants
0 Participants
n=21 Participants
2 Participants
n=8 Participants
19 Participants
n=8 Participants
Region of Enrollment
Lebanon
0 Participants
n=5 Participants
4 Participants
n=7 Participants
3 Participants
n=5 Participants
0 Participants
n=4 Participants
1 Participants
n=21 Participants
0 Participants
n=8 Participants
8 Participants
n=8 Participants
Region of Enrollment
Netherlands
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
2 Participants
n=4 Participants
0 Participants
n=21 Participants
1 Participants
n=8 Participants
3 Participants
n=8 Participants
Region of Enrollment
Turkey
3 Participants
n=5 Participants
5 Participants
n=7 Participants
7 Participants
n=5 Participants
1 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=8 Participants
16 Participants
n=8 Participants
Region of Enrollment
Morocco
1 Participants
n=5 Participants
1 Participants
n=7 Participants
0 Participants
n=5 Participants
2 Participants
n=4 Participants
0 Participants
n=21 Participants
2 Participants
n=8 Participants
6 Participants
n=8 Participants
Region of Enrollment
Denmark
3 Participants
n=5 Participants
0 Participants
n=7 Participants
2 Participants
n=5 Participants
0 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=8 Participants
5 Participants
n=8 Participants
Region of Enrollment
Italy
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
1 Participants
n=21 Participants
1 Participants
n=8 Participants
2 Participants
n=8 Participants
Region of Enrollment
Georgia
0 Participants
n=5 Participants
2 Participants
n=7 Participants
1 Participants
n=5 Participants
3 Participants
n=4 Participants
1 Participants
n=21 Participants
1 Participants
n=8 Participants
8 Participants
n=8 Participants
Region of Enrollment
Israel
2 Participants
n=5 Participants
2 Participants
n=7 Participants
2 Participants
n=5 Participants
1 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=8 Participants
7 Participants
n=8 Participants
Region of Enrollment
France
2 Participants
n=5 Participants
1 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
2 Participants
n=21 Participants
2 Participants
n=8 Participants
7 Participants
n=8 Participants
Region of Enrollment
Tunisia
4 Participants
n=5 Participants
2 Participants
n=7 Participants
0 Participants
n=5 Participants
5 Participants
n=4 Participants
4 Participants
n=21 Participants
0 Participants
n=8 Participants
15 Participants
n=8 Participants
BMI
22.900 kg/m2
STANDARD_DEVIATION 3.2252 • n=5 Participants
21.252 kg/m2
STANDARD_DEVIATION 2.2874 • n=7 Participants
22.699 kg/m2
STANDARD_DEVIATION 2.9968 • n=5 Participants
22.031 kg/m2
STANDARD_DEVIATION 3.5415 • n=4 Participants
21.1320 kg/m2
STANDARD_DEVIATION 3.5047 • n=21 Participants
21.9120 kg/m2
STANDARD_DEVIATION 3.5638 • n=8 Participants
22.0873 kg/m2
STANDARD_DEVIATION 3.1573 • n=8 Participants
Serum Ferritin
1724.4 micrograms per liter
STANDARD_DEVIATION 1857.66 • n=5 Participants
3449.1 micrograms per liter
STANDARD_DEVIATION 5093.24 • n=7 Participants
1793.3 micrograms per liter
STANDARD_DEVIATION 1844.72 • n=5 Participants
981.4 micrograms per liter
STANDARD_DEVIATION 951.29 • n=4 Participants
945.8 micrograms per liter
STANDARD_DEVIATION 962.09 • n=21 Participants
447.8 micrograms per liter
STANDARD_DEVIATION 222.32 • n=8 Participants
1726.69 micrograms per liter
STANDARD_DEVIATION 2740.18 • n=8 Participants

PRIMARY outcome

Timeframe: Baseline to Week 40

Population: Safety Analysis set

Incidence and severity of Adverse Events Incidence and severity of Serious Adverse Events

Outcome measures

Outcome measures
Measure
TDT High Dose
n=29 Participants
TDT High dose
TDT Low Dose
n=25 Participants
TDT Low dose
TDT Placebo
n=20 Participants
TDT Placebo
NTDT High Dose
n=24 Participants
NTDT High dose
NTDT Low Dose
n=12 Participants
NTDT Low dose
NTDT Placebo
n=12 Participants
NTDT Placebo
IMR-687 Safety and Tolerability
Treatment emergent Adverse Events
25 Participants
22 Participants
15 Participants
18 Participants
12 Participants
6 Participants
IMR-687 Safety and Tolerability
Treatment emergent Adverse Event related to study drug
19 Participants
15 Participants
8 Participants
11 Participants
7 Participants
4 Participants
IMR-687 Safety and Tolerability
Grade 3 or greater treatment emergent Adverse Event
4 Participants
9 Participants
2 Participants
4 Participants
1 Participants
1 Participants

SECONDARY outcome

Timeframe: Baseline to Week 24

Population: Per Protocol Analysis

Proportion of patients with ≥33% hematological improvement (as measured by reduced transfusion burden) from Week 12 to Week 24 compared to the 12 weeks prior to Baseline (Day 1)

Outcome measures

Outcome measures
Measure
TDT High Dose
n=21 Participants
TDT High dose
TDT Low Dose
n=18 Participants
TDT Low dose
TDT Placebo
n=18 Participants
TDT Placebo
NTDT High Dose
NTDT High dose
NTDT Low Dose
NTDT Low dose
NTDT Placebo
NTDT Placebo
TDT Patients: Reduction in Red Blood Cell (RBC) Transfusion Burden With ≥33% Hematological Improvement From Week 12 to Week 24
2 Participants
1 Participants
2 Participants

SECONDARY outcome

Timeframe: Baseline to Week 24

Population: Per protocol analysis

Proportion of subjects with an increase from baseline of ≥1.0 g/dL in mean Hb values at Week 12 to Week 24 in the absence of transfusions.

Outcome measures

Outcome measures
Measure
TDT High Dose
n=15 Participants
TDT High dose
TDT Low Dose
n=10 Participants
TDT Low dose
TDT Placebo
n=10 Participants
TDT Placebo
NTDT High Dose
NTDT High dose
NTDT Low Dose
NTDT Low dose
NTDT Placebo
NTDT Placebo
NTDT Patients: Proportion of Subjects With an Increase From Baseline of Hb at Week 12 to Week 24 in the Absence of Transfusions.
0 Participants
0 Participants
0 Participants

SECONDARY outcome

Timeframe: Baseline to Week 24

Population: Per Protocol Analysis

Proportion of subjects with an increase from baseline of ≥3% in mean HbF values at Week 12 to Week 24 in absence of transfusions

Outcome measures

Outcome measures
Measure
TDT High Dose
n=11 Participants
TDT High dose
TDT Low Dose
n=5 Participants
TDT Low dose
TDT Placebo
n=8 Participants
TDT Placebo
NTDT High Dose
NTDT High dose
NTDT Low Dose
NTDT Low dose
NTDT Placebo
NTDT Placebo
NTDT Patients: Proportion of Subjects With an Increase From Baseline of ≥3% in Mean HbF Values at Week 12 to Week 24 in Absence of Transfusions
1 Participants
1 Participants
0 Participants

SECONDARY outcome

Timeframe: Baseline to Week 36

Population: Per Protocol Analysis

Proportion of patients with ≥33% hematological improvement from Week 24 to Week 36 compared to the 12 weeks prior to Baseline (Day 1)

Outcome measures

Outcome measures
Measure
TDT High Dose
n=16 Participants
TDT High dose
TDT Low Dose
n=13 Participants
TDT Low dose
TDT Placebo
n=15 Participants
TDT Placebo
NTDT High Dose
NTDT High dose
NTDT Low Dose
NTDT Low dose
NTDT Placebo
NTDT Placebo
TDT Patients: Reduction in Red Blood Cell (RBC) Transfusion Burden With ≥33% Hematological Improvement From Week 24 to Week 36
0 Participants
1 Participants
1 Participants

SECONDARY outcome

Timeframe: Baseline to Week 24

Population: Per Protocol Analysis

Proportion of patients with ≥50% hematological improvement from Week 12 to Week 24 compared to the 12 weeks prior to Baseline (Day 1)

Outcome measures

Outcome measures
Measure
TDT High Dose
n=21 Participants
TDT High dose
TDT Low Dose
n=18 Participants
TDT Low dose
TDT Placebo
n=18 Participants
TDT Placebo
NTDT High Dose
NTDT High dose
NTDT Low Dose
NTDT Low dose
NTDT Placebo
NTDT Placebo
TDT Patients: Reduction in Red Blood Cell (RBC) Transfusion Burden With ≥50 % Hematological Improvement From Week 12 to Week 24
0 Participants
0 Participants
2 Participants

SECONDARY outcome

Timeframe: Baseline to Week 36

Population: Per Protocol Analysis

Proportion of patients with ≥50% hematological improvement from Week 24 to Week 36 compared to the 12 weeks prior to Baseline (Day 1)

Outcome measures

Outcome measures
Measure
TDT High Dose
n=16 Participants
TDT High dose
TDT Low Dose
n=13 Participants
TDT Low dose
TDT Placebo
n=15 Participants
TDT Placebo
NTDT High Dose
NTDT High dose
NTDT Low Dose
NTDT Low dose
NTDT Placebo
NTDT Placebo
TDT Patients: Reduction in Red Blood Cell (RBC) Transfusion Burden With ≥50% Hematological Improvement From Week 24 to Week 36
0 Participants
1 Participants
1 Participants

SECONDARY outcome

Timeframe: Baseline to Week 36

Population: Per Protocol Analysis

Proportion of subjects with an increase from baseline of ≥1.0 g/dL in mean Hb values at Week 24 to Week 36 in the absence of transfusions.

Outcome measures

Outcome measures
Measure
TDT High Dose
n=12 Participants
TDT High dose
TDT Low Dose
n=9 Participants
TDT Low dose
TDT Placebo
n=8 Participants
TDT Placebo
NTDT High Dose
NTDT High dose
NTDT Low Dose
NTDT Low dose
NTDT Placebo
NTDT Placebo
NTDT Patients: Proportion of Subjects With an Increase From Baseline of Hb at Week 24 to Week 36 in the Absence of Transfusions
1 Participants
1 Participants
0 Participants

SECONDARY outcome

Timeframe: Baseline to Week 36

Population: Per Protocol Analysis

Proportion of subjects with an increase from baseline of ≥3% in mean HbF values at Week 24 to Week 36 in absence of transfusions

Outcome measures

Outcome measures
Measure
TDT High Dose
n=8 Participants
TDT High dose
TDT Low Dose
n=6 Participants
TDT Low dose
TDT Placebo
n=7 Participants
TDT Placebo
NTDT High Dose
NTDT High dose
NTDT Low Dose
NTDT Low dose
NTDT Placebo
NTDT Placebo
NTDT: Proportion of Subjects With an Increase From Baseline of ≥3% in Mean HbF Values at Week 24 to Week 36 in Absence of Transfusions
1 Participants
0 Participants
0 Participants

Adverse Events

TDT High Dose

Serious events: 1 serious events
Other events: 25 other events
Deaths: 0 deaths

TDT Low Dose

Serious events: 3 serious events
Other events: 22 other events
Deaths: 0 deaths

TDT Placebo

Serious events: 1 serious events
Other events: 15 other events
Deaths: 0 deaths

NTDT High Dose

Serious events: 3 serious events
Other events: 18 other events
Deaths: 0 deaths

NTDT Low Dose

Serious events: 0 serious events
Other events: 12 other events
Deaths: 0 deaths

NTDT Placebo

Serious events: 0 serious events
Other events: 6 other events
Deaths: 0 deaths

Serious adverse events

Serious adverse events
Measure
TDT High Dose
n=29 participants at risk
TDT High dose
TDT Low Dose
n=25 participants at risk
TDT Low dose
TDT Placebo
n=20 participants at risk
TDT Placebo
NTDT High Dose
n=24 participants at risk
NTDT High dose
NTDT Low Dose
n=12 participants at risk
NTDT Low dose
NTDT Placebo
n=12 participants at risk
NTDT Placebo
Injury, poisoning and procedural complications
Carbon Monoxide Poisoning
0.00%
0/29 • 10 months
0.00%
0/25 • 10 months
5.0%
1/20 • Number of events 1 • 10 months
0.00%
0/24 • 10 months
0.00%
0/12 • 10 months
0.00%
0/12 • 10 months
Infections and infestations
COVID19
0.00%
0/29 • 10 months
8.0%
2/25 • Number of events 2 • 10 months
0.00%
0/20 • 10 months
0.00%
0/24 • 10 months
0.00%
0/12 • 10 months
0.00%
0/12 • 10 months
Infections and infestations
Liver abscess
0.00%
0/29 • 10 months
4.0%
1/25 • Number of events 1 • 10 months
0.00%
0/20 • 10 months
0.00%
0/24 • 10 months
0.00%
0/12 • 10 months
0.00%
0/12 • 10 months
Infections and infestations
Pneumonia
0.00%
0/29 • 10 months
4.0%
1/25 • Number of events 1 • 10 months
0.00%
0/20 • 10 months
0.00%
0/24 • 10 months
0.00%
0/12 • 10 months
0.00%
0/12 • 10 months
Musculoskeletal and connective tissue disorders
Back Pain
3.4%
1/29 • Number of events 1 • 10 months
0.00%
0/25 • 10 months
0.00%
0/20 • 10 months
0.00%
0/24 • 10 months
0.00%
0/12 • 10 months
0.00%
0/12 • 10 months
Skin and subcutaneous tissue disorders
Rash
3.4%
1/29 • Number of events 1 • 10 months
0.00%
0/25 • 10 months
0.00%
0/20 • 10 months
0.00%
0/24 • 10 months
0.00%
0/12 • 10 months
0.00%
0/12 • 10 months
Injury, poisoning and procedural complications
Transfusion Reaction
3.4%
1/29 • Number of events 1 • 10 months
0.00%
0/25 • 10 months
0.00%
0/20 • 10 months
0.00%
0/24 • 10 months
0.00%
0/12 • 10 months
0.00%
0/12 • 10 months
Infections and infestations
Lower Respiratory Tract Infection
0.00%
0/29 • 10 months
0.00%
0/25 • 10 months
0.00%
0/20 • 10 months
4.2%
1/24 • Number of events 1 • 10 months
0.00%
0/12 • 10 months
0.00%
0/12 • 10 months
Injury, poisoning and procedural complications
Lower Limb Fracture
0.00%
0/29 • 10 months
0.00%
0/25 • 10 months
0.00%
0/20 • 10 months
4.2%
1/24 • Number of events 1 • 10 months
0.00%
0/12 • 10 months
0.00%
0/12 • 10 months
Hepatobiliary disorders
Cholelithiasis
0.00%
0/29 • 10 months
0.00%
0/25 • 10 months
0.00%
0/20 • 10 months
4.2%
1/24 • Number of events 1 • 10 months
0.00%
0/12 • 10 months
0.00%
0/12 • 10 months

Other adverse events

Other adverse events
Measure
TDT High Dose
n=29 participants at risk
TDT High dose
TDT Low Dose
n=25 participants at risk
TDT Low dose
TDT Placebo
n=20 participants at risk
TDT Placebo
NTDT High Dose
n=24 participants at risk
NTDT High dose
NTDT Low Dose
n=12 participants at risk
NTDT Low dose
NTDT Placebo
n=12 participants at risk
NTDT Placebo
Nervous system disorders
Headache
34.5%
10/29 • 10 months
40.0%
10/25 • 10 months
35.0%
7/20 • 10 months
20.8%
5/24 • 10 months
16.7%
2/12 • 10 months
16.7%
2/12 • 10 months
Gastrointestinal disorders
Nausea
37.9%
11/29 • 10 months
24.0%
6/25 • 10 months
5.0%
1/20 • 10 months
20.8%
5/24 • 10 months
8.3%
1/12 • 10 months
8.3%
1/12 • 10 months
Nervous system disorders
Dizziness
17.2%
5/29 • 10 months
20.0%
5/25 • 10 months
10.0%
2/20 • 10 months
4.2%
1/24 • 10 months
0.00%
0/12 • 10 months
8.3%
1/12 • 10 months
Gastrointestinal disorders
Diarrhoea
13.8%
4/29 • 10 months
4.0%
1/25 • 10 months
10.0%
2/20 • 10 months
4.2%
1/24 • 10 months
16.7%
2/12 • 10 months
0.00%
0/12 • 10 months
Infections and infestations
Gastroenteritis
10.3%
3/29 • 10 months
0.00%
0/25 • 10 months
0.00%
0/20 • 10 months
0.00%
0/24 • 10 months
0.00%
0/12 • 10 months
0.00%
0/12 • 10 months
Gastrointestinal disorders
Abdominal Distension
6.9%
2/29 • 10 months
0.00%
0/25 • 10 months
5.0%
1/20 • 10 months
0.00%
0/24 • 10 months
0.00%
0/12 • 10 months
0.00%
0/12 • 10 months
Gastrointestinal disorders
Abdominal Pain
6.9%
2/29 • 10 months
8.0%
2/25 • 10 months
0.00%
0/20 • 10 months
0.00%
0/24 • 10 months
8.3%
1/12 • 10 months
0.00%
0/12 • 10 months
Gastrointestinal disorders
Abdominal Pain Upper
6.9%
2/29 • 10 months
4.0%
1/25 • 10 months
5.0%
1/20 • 10 months
12.5%
3/24 • 10 months
25.0%
3/12 • 10 months
0.00%
0/12 • 10 months
Respiratory, thoracic and mediastinal disorders
Cough
6.9%
2/29 • 10 months
0.00%
0/25 • 10 months
10.0%
2/20 • 10 months
4.2%
1/24 • 10 months
8.3%
1/12 • 10 months
0.00%
0/12 • 10 months
General disorders
Fatigue
3.4%
1/29 • 10 months
0.00%
0/25 • 10 months
0.00%
0/20 • 10 months
12.5%
3/24 • 10 months
16.7%
2/12 • 10 months
0.00%
0/12 • 10 months
Gastrointestinal disorders
Vomitting
3.4%
1/29 • 10 months
0.00%
0/25 • 10 months
0.00%
0/20 • 10 months
12.5%
3/24 • 10 months
16.7%
2/12 • 10 months
0.00%
0/12 • 10 months
Blood and lymphatic system disorders
Anemia
0.00%
0/29 • 10 months
4.0%
1/25 • 10 months
5.0%
1/20 • 10 months
8.3%
2/24 • 10 months
16.7%
2/12 • 10 months
8.3%
1/12 • 10 months
Infections and infestations
COVID19
3.4%
1/29 • 10 months
12.0%
3/25 • 10 months
0.00%
0/20 • 10 months
12.5%
3/24 • 10 months
0.00%
0/12 • 10 months
16.7%
2/12 • 10 months

Additional Information

Rahul Ballal

Imara, Inc.

Phone: 617-206-2020

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place