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Efficacy and Safety Extension Study of Oral Edaravone Administered in Subjects With ALS

A Phase 3b, Multicenter, Randomized, Double-blind Extension Study to Evaluate the Continued Efficacy and Safety of Oral Edaravone Administered for an Additional Period of up to 48 Weeks Following Study MT-1186-A02 in Subjects With Amyotrophic Lateral Sclerosis (ALS)

Status
Terminated
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05151471
Enrollment
202
Registered
2021-12-09
Start date
2022-01-11
Completion date
2023-09-29
Last updated
2026-08-20

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

ALS

Brief summary

To evaluate and compare the efficacy of two dosing regimens of oral edaravone in subjects with amyotrophic lateral sclerosis (ALS), based on the time from the randomization date in Study MT-1186-A02 to at least a 12-point decrease in Revised ALS Functional Rating Score (ALSFRS-R) or death, whichever happens first, over the course of the study or until oral edaravone is commercially available in that country

Interventions

Oral edaravone

DRUGPlacebo

Oral

Sponsors

Shionogi
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

1. Subjects or their legally authorized representative must provide a signed and dated informed consent form to participate in the study. 2. Subjects must be able (in the judgment of the Investigator) to understand the nature of the study and all risks involved with participation in the study. 3. Subjects must be willing to cooperate and comply with all protocol restrictions and requirements. 4. Subjects must have successfully completed all Study MT-1186-A02 visits and have been compliant with study drug.

Exclusion criteria

1. Subjects of childbearing potential unwilling to use an acceptable method of contraception from the Day 1/screening visit until 3 months after the last dose of study medication. Subjects who are sexually active who do not agree to use contraception during the study period. 2. Subjects who are female, of childbearing potential, and pregnant (a positive pregnancy test) or lactating at the Day 1/screening visit. 3. Subjects who have a significant risk of suicide. Subjects with any suicidal behavior or suicidal ideation of type 4 (active suicidal ideation with some intent to act, without a specific plan) or type 5 (active suicidal ideation with specific plan and intent) based on the Columbia-Suicide Severity Rating Scale (C-SSRS) at Week 48 of Study MT-1186-A02. 4. Subjects who are not eligible to continue in the study, as judged by the Investigator in conjunction with the MTDA medical monitor. 5. Subjects who are unable to take their medications orally or through a PEG/RIG tube.

Design outcomes

Primary

MeasureTime frameDescription
Time From the Randomization Date in Study MT-1186-A02 to at Least a 12-point Decrease in ALSFRS-R or Death, Whichever Happens First.Up to 96 weeksThe ASLFRS-R is Amyotrophic Lateral Sclerosis Functional Rating Scale-Revised. The ALSFRS-R measures 12 aspects of physical function, ranging from one's ability to swallow and use utensils to climbing stairs and breathing. Each function is scored from 4 (normal) to 0 (no ability), with a maximum total score of 48 and a minimum total score of 0.

Secondary

MeasureTime frameDescription
The Combined Assessment of Function and Survival (CAFS) Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04Baseline, Week 72 and Week 96CAFS analysis ranks clinical outcomes on the basis of survival time and change in the ALS Functional Rating Scale-Revised (ALSFRS-R) score. A subject's score will be calculated by comparing each subject to every other subject within each treatment group in the study, resulting in a score of +1 if the outcome was better than the subject being compared, -1 if worse, and 0 if the same. The subject's score will then be calculated by summing up their comparison to all of the other subjects within each treatment group in the study as CAFS score. Patients' summary scores are ranked; a higher score indicates a better performance. The score range is from 1 to N, where N is the total sample size. Since CAFS were calculated using the imputed ALSFRS-R scores with multiple imputation method, and the maximum varies for each simulation, 383 is the maximum possible value of full range for measure of dispersion.
Change in the Amyotrophic Lateral Sclerosis Assessment Questionnaire 40 Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04Baseline, Week 72 and Week 96The ALSAQ-40 is a questionnaire that consists of 40 questions/items with 5 discrete scales: physical mobility, activities of daily living and independence, eating and drinking, communication, emotional reactions, ranging from 0 (best health as assessed by the scale) to 100 (worse health as assessed by the measure).
Change in ALSFRS-R Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04Baseline, Week 72, Week 84 and Week 96The ALSFRS-R is rating scale (ratings 0 = can't do, to 4 = normal ability) used to determine participants' assessment of their capability and independence in 12 functional activities.
Time From the Randomization Date in Study MT-1186-A02 to Death, Tracheostomy, or Permanent Assisted Mechanical Ventilation (≥23 Hours/Day)Up to 96 weeks
Time From the Randomization Date in Study MT-1186-A02 to Death or Permanent Assisted Mechanical Ventilation (>23 Hours/Day)Up to 96 weeks
Time From the Randomization Date in Study MT-1186-A02 to DeathUp to 96 weeks

Countries

Canada, Germany, Japan, South Korea, Switzerland, United States

Contacts

STUDY_DIRECTORShionogi Clinical Trials Administrator Clinical Support Help Line

Shionogi

Participant flow

Participants by arm

ArmCount
Edaravone 105 mg (Once Daily)
Oral edaravone administered once daily for up to 48 weeks or until the drug is commercially available in that country. MT-1186: Oral edaravone
192
Edaravone 105 mg (on/Off)
Oral edaravone administered for 10 days followed by 18-day placebo (regimen denoted as on/off) for up to 48 weeks or until the drug is commercially available in that country. MT-1186: Oral edaravone Placebo: Oral
192
Total384

Baseline characteristics

CharacteristicEdaravone 105 mg (Once Daily)Edaravone 105 mg (on/Off)Total
Age, Customized
Adults (18-64 years)
134 Participants122 Participants256 Participants
Age, Customized
From 65-84 years
58 Participants70 Participants128 Participants
Race/Ethnicity, Customized
American Indian or Alaska Native
0 Participants1 Participants1 Participants
Race/Ethnicity, Customized
Asian - Japanese
63 Participants64 Participants127 Participants
Race/Ethnicity, Customized
Asian - Not Japanese
8 Participants13 Participants21 Participants
Race/Ethnicity, Customized
Black or African American
3 Participants2 Participants5 Participants
Race/Ethnicity, Customized
Native Hawaiian or Pacific Islander
0 Participants1 Participants1 Participants
Race/Ethnicity, Customized
Not Reported
0 Participants1 Participants1 Participants
Race/Ethnicity, Customized
Other
3 Participants1 Participants4 Participants
Race/Ethnicity, Customized
White
115 Participants109 Participants224 Participants
Sex: Female, Male
Female
69 Participants70 Participants139 Participants
Sex: Female, Male
Male
123 Participants122 Participants245 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
15 / 10412 / 98
other
Total, other adverse events
24 / 10425 / 98
serious
Total, serious adverse events
33 / 10427 / 98

Outcome results

Primary

Time From the Randomization Date in Study MT-1186-A02 to at Least a 12-point Decrease in ALSFRS-R or Death, Whichever Happens First.

The ASLFRS-R is Amyotrophic Lateral Sclerosis Functional Rating Scale-Revised. The ALSFRS-R measures 12 aspects of physical function, ranging from one's ability to swallow and use utensils to climbing stairs and breathing. Each function is scored from 4 (normal) to 0 (no ability), with a maximum total score of 48 and a minimum total score of 0.

Time frame: Up to 96 weeks

Population: The outcome measure time frame is from the randomization date in Study MT- 1186-A02 to at least a 12-point decrease in ALSFRS-R or death, whichever happened first.

ArmMeasureValue (MEAN)
Edaravone 105 mg (Once Daily)Time From the Randomization Date in Study MT-1186-A02 to at Least a 12-point Decrease in ALSFRS-R or Death, Whichever Happens First.13.9 Month
Edaravone 105 mg (on/Off)Time From the Randomization Date in Study MT-1186-A02 to at Least a 12-point Decrease in ALSFRS-R or Death, Whichever Happens First.15.05 Month
p-value: 0.78Log Rank
Secondary

Change in ALSFRS-R Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04

The ALSFRS-R is rating scale (ratings 0 = can't do, to 4 = normal ability) used to determine participants' assessment of their capability and independence in 12 functional activities.

Time frame: Baseline, Week 72, Week 84 and Week 96

Population: Those patients reached to Week 72, Week 84 and Week 96, and conducted ALSFRS-R assessment.

ArmMeasureGroupValue (LEAST_SQUARES_MEAN)Dispersion
Edaravone 105 mg (Once Daily)Change in ALSFRS-R Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04Week 72-15.02 PointStandard Error 0.95
Edaravone 105 mg (Once Daily)Change in ALSFRS-R Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04Week 84-16.79 PointStandard Error 1.11
Edaravone 105 mg (Once Daily)Change in ALSFRS-R Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04Week 96-18.21 PointStandard Error 1.31
Edaravone 105 mg (on/Off)Change in ALSFRS-R Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04Week 72-15.90 PointStandard Error 0.95
Edaravone 105 mg (on/Off)Change in ALSFRS-R Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04Week 84-18.27 PointStandard Error 1.1
Edaravone 105 mg (on/Off)Change in ALSFRS-R Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04Week 96-20.95 PointStandard Error 1.32
Comparison: Week 72p-value: 0.513Mixed Model for Repeated Measures (MMRM)
Comparison: Week 84p-value: 0.344Mixed Model for Repeated Measures (MMRM)
Comparison: Week 96p-value: 0.142Mixed Model for Repeated Measures (MMRM)
Secondary

Change in the Amyotrophic Lateral Sclerosis Assessment Questionnaire 40 Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04

The ALSAQ-40 is a questionnaire that consists of 40 questions/items with 5 discrete scales: physical mobility, activities of daily living and independence, eating and drinking, communication, emotional reactions, ranging from 0 (best health as assessed by the scale) to 100 (worse health as assessed by the measure).

Time frame: Baseline, Week 72 and Week 96

Population: Those patients reached to Week 72 and Week 96, and conducted ALSAQ-40 assessment.

ArmMeasureGroupValue (LEAST_SQUARES_MEAN)Dispersion
Edaravone 105 mg (Once Daily)Change in the Amyotrophic Lateral Sclerosis Assessment Questionnaire 40 Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04Week 7245.71 PointStandard Error 3.14
Edaravone 105 mg (Once Daily)Change in the Amyotrophic Lateral Sclerosis Assessment Questionnaire 40 Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04Week 9654.83 PointStandard Error 4.05
Edaravone 105 mg (on/Off)Change in the Amyotrophic Lateral Sclerosis Assessment Questionnaire 40 Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04Week 7245.46 PointStandard Error 3.11
Edaravone 105 mg (on/Off)Change in the Amyotrophic Lateral Sclerosis Assessment Questionnaire 40 Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04Week 9657.91 PointStandard Error 4.13
Comparison: Week 72p-value: 0.954Mixed Model for Repeated Measures (MMRM)
Comparison: Week 96p-value: 0.591Mixed Model for Repeated Measures (MMRM)
Secondary

The Combined Assessment of Function and Survival (CAFS) Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04

CAFS analysis ranks clinical outcomes on the basis of survival time and change in the ALS Functional Rating Scale-Revised (ALSFRS-R) score. A subject's score will be calculated by comparing each subject to every other subject within each treatment group in the study, resulting in a score of +1 if the outcome was better than the subject being compared, -1 if worse, and 0 if the same. The subject's score will then be calculated by summing up their comparison to all of the other subjects within each treatment group in the study as CAFS score. Patients' summary scores are ranked; a higher score indicates a better performance. The score range is from 1 to N, where N is the total sample size. Since CAFS were calculated using the imputed ALSFRS-R scores with multiple imputation method, and the maximum varies for each simulation, 383 is the maximum possible value of full range for measure of dispersion.

Time frame: Baseline, Week 72 and Week 96

Population: One subject randomized to the On/Off treatment group was excluded from this analysis because the subject did not receive any study treatment.

ArmMeasureGroupValue (MEAN)
Edaravone 105 mg (Once Daily)The Combined Assessment of Function and Survival (CAFS) Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04Week 72193.6 units on a scale
Edaravone 105 mg (Once Daily)The Combined Assessment of Function and Survival (CAFS) Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04Week 96200.8 units on a scale
Edaravone 105 mg (on/Off)The Combined Assessment of Function and Survival (CAFS) Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04Week 72189.1 units on a scale
Edaravone 105 mg (on/Off)The Combined Assessment of Function and Survival (CAFS) Score at All Visits From Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04Week 96181.6 units on a scale
Comparison: Week 72p-value: 0.704ANCOVA
Comparison: Week 96p-value: 0.131ANCOVA
Secondary

Time From the Randomization Date in Study MT-1186-A02 to Death

Time frame: Up to 96 weeks

Population: The outcome measure time frame is from Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04.

ArmMeasureValue (MEDIAN)
Edaravone 105 mg (Once Daily)Time From the Randomization Date in Study MT-1186-A02 to DeathNA Month
Edaravone 105 mg (on/Off)Time From the Randomization Date in Study MT-1186-A02 to DeathNA Month
Secondary

Time From the Randomization Date in Study MT-1186-A02 to Death or Permanent Assisted Mechanical Ventilation (>23 Hours/Day)

Time frame: Up to 96 weeks

Population: The outcome measure time frame is from Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04.

ArmMeasureValue (MEDIAN)
Edaravone 105 mg (Once Daily)Time From the Randomization Date in Study MT-1186-A02 to Death or Permanent Assisted Mechanical Ventilation (>23 Hours/Day)NA Month
Edaravone 105 mg (on/Off)Time From the Randomization Date in Study MT-1186-A02 to Death or Permanent Assisted Mechanical Ventilation (>23 Hours/Day)NA Month
Secondary

Time From the Randomization Date in Study MT-1186-A02 to Death, Tracheostomy, or Permanent Assisted Mechanical Ventilation (≥23 Hours/Day)

Time frame: Up to 96 weeks

Population: The outcome measure time frame is from Baseline in Study MT-1186-A02 to the End of Study MT-1186-A04.

ArmMeasureValue (MEDIAN)
Edaravone 105 mg (Once Daily)Time From the Randomization Date in Study MT-1186-A02 to Death, Tracheostomy, or Permanent Assisted Mechanical Ventilation (≥23 Hours/Day)NA Month
Edaravone 105 mg (on/Off)Time From the Randomization Date in Study MT-1186-A02 to Death, Tracheostomy, or Permanent Assisted Mechanical Ventilation (≥23 Hours/Day)NA Month

Source: ClinicalTrials.gov · Data processed: Aug 21, 2026