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ACR16

Phase 3

Huntington Disease | Small molecule | Neurology |Teva Pharmaceutical Industries Limited|Trials Updated: Aug 31, 2023

ACR16 development status

Highest phase Phase 3
Registered trials 4 across 2 sponsors since Apr 2008

ACR16 target and mechanism

ModalitySmall molecule

Also known as pridopidine

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials2
Total Enrollment664

FDA Designations

No designations recorded

ACR16 clinical trials

ACR16 · 2 trials · 2 indications

Phase 3 1Phase 2 1
NCT00665223A Study of Treatment With Pridopidine (ACR16) in Participants With Huntington's DiseaseHuntington's Disease
COMPLETED437 Analytics
PHASE3COMPLETED
A Study of Treatment With Pridopidine (ACR16) in Participants With Huntington's Disease
Huntington's DiseaseUnlock trial analytics

Study Endpoints

Primary Endpoints

Change From Baseline in Modified Motor Score (mMS) (Sum of Score of Items 4-10 and 13-15 of the Unified Huntington's Disease Rating Scale [UHDRS] Motor Assessments) at Week 26
Baseline, Week 26

The mMS is a subscale of the UHDRS total motor score and comprises 13 responses from the 10 items, 4-10 and 13-15, from the UHDRS motor assessment. The items for mMS include dysarthria, tongue protrusion, finger taps (right and left), pronate/supinate hands (right and left), luria - first-hand-palm sequencing, arms rigidity (right and left), body bradykinesia, gait, tandem walking, and retropulsion pull test. Each of these items are rated on a scale of 0 (normal) to 4 (marked impairment). Total score ranges from 0 to 52, with higher scores indicating more severe motor impairment.

Change From Baseline in Modified Motor Score (mMS) (Sum of Score of Items 4-10 and 13-15 of the UHDRS Motor Assessments) at Week 12
Baseline, Week 12

The mMS is a subscale of the UHDRS total motor score and comprises 13 responses from the 10 items, 4-10 and 13-15, from the UHDRS motor assessment. The items for mMS included dysarthria, tongue protrusion, finger taps (right and left), pronate/supinate hands (right and left), luria - first-hand-palm sequencing, arms rigidity (right and left), body bradykinesia, gait, tandem walking, and retropulsion pull test. Each of these items were rated on a scale of 0 (normal) to 4 (marked impairment). Total score ranged from 0 to 52, with higher scores indicating more severe motor impairment. The last observation carried forward (LOCF) method was used to generate an mMS score for each participant for Week 12 assessment.

Secondary Endpoints

The UHDRS Functional Assessment at Week 26
Week 26
Number of Participants With Clinical Global Impression - Improvement (CGI-I) Score
Week 26
Change From Baseline in Stroop Word Reading Test at Week 26
Baseline, Week 26
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
PlaceboPLACEBO_COMPARATORParticipants will receive a placebo capsule matching to ACR16 once daily for the first 4 weeks. After 4 weeks (Weeks 5 to 26), placebo capsule will be taken twice daily as 2 separate doses.
ACR16 45 mgEXPERIMENTALParticipants will receive ACR16 45 milligrams (mg) capsule orally once daily for the first 4 weeks. After 4 weeks (Weeks 5 to 26), one ACR16 45 mg capsule and one placebo capsule will be taken as 2 separate doses.
ACR16 90 mgEXPERIMENTALParticipants will receive ACR16 45 mg capsule once daily for the first 4 weeks. After 4 weeks (Weeks 5 to 26), ACR16 45 mg capsule will be taken twice daily as 2 separate doses (total dose: 90 mg)
ACR16 10 mg BIDEXPERIMENTALParticipants will receive ACR16 10 milligrams (mg) capsule orally once daily for the first 4 weeks. After 4 weeks (Weeks 5 to 12), ACR16 10 mg capsule will be taken twice daily (BID) as 2 separate doses (total dose: 20 mg).
ACR16 22.5 mg BIDEXPERIMENTALParticipants will receive ACR16 22.5 mg capsule orally once daily for the first 4 weeks. After 4 weeks (Weeks 5 to 12), ACR16 22.5 mg capsule will be taken twice daily (BID) as 2 separate doses (total dose: 45 mg).
ACR16 45 mg BIDEXPERIMENTALParticipants will receive ACR16 45 mg capsule once daily for the first 4 weeks. After 4 weeks (Weeks 5 to 12), ACR16 45 mg capsule will be taken twice daily (BID) as 2 separate doses (total dose: 90 mg).

Interventions

NameTypeDescription
ACR16DRUGCapsules will be swallowed whole with water.
PlaceboDRUGCapsules will be swallowed whole with water.
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Eligibility Criteria

Age Range30 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites31

Inclusion Criteria: * Able to provide written Informed Consent prior to any study related procedure. * Huntington's disease diagnosed with the aid of clinical features and a positive family history and/or the presence of ≥ 36 CAG repeats in the Huntington gene. * Male or female age ≥ 30 years. * Wi...

Countries:AustriaBelgiumFranceGermanyItalyPortugalSpainUnited KingdomUnited StatesCanada
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Competitive Landscape -Huntington's Disease 15 trials (matched to "Huntington Disease")

Frequently asked questions about ACR16

What is ACR16 used for in Huntington disease?

ACR16 is an investigational small molecule developed by Teva Pharmaceutical Industries for the treatment of Huntington disease, a progressive neurological disorder. It has been studied in clinical trials in adults aged 30 years and older with the condition. ACR16 is not described as approved and remains in clinical development.

Who makes ACR16?

ACR16 is developed by Teva Pharmaceutical Industries Limited, which trades under the ticker TEVA. Teva sponsored both of the completed clinical trials of ACR16 in Huntington disease, one conducted in the United States and Canada and the other across several European countries.

What phase is ACR16 in?

ACR16 has reached Phase 3 development for Huntington disease. Its Phase 3 trial, NCT00665223, is completed, and an earlier Phase 2 trial, NCT00724048, is also completed. Both studies have finished, and no trials of ACR16 are currently listed as active.

What clinical trials is ACR16 in?

ACR16 has been evaluated in two completed randomized, double-blind, placebo-controlled trials in Huntington disease. NCT00724048 was a Phase 2 study enrolling 227 participants in the United States and Canada. NCT00665223 was a Phase 3 study enrolling 437 participants across Austria, Belgium, France, Germany, Italy, Portugal, Spain, and the United Kingdom.

Is ACR16 the same as pridopidine?

Yes, ACR16 is also known as pridopidine. Both completed trials of ACR16 in Huntington disease are titled using the name pridopidine, so searches for either name refer to the same investigational small molecule being developed by Teva Pharmaceutical Industries for Huntington disease.

How many people were enrolled in ACR16 trials?

The two completed ACR16 trials in Huntington disease enrolled a combined total of 664 participants. The Phase 2 trial NCT00724048 enrolled 227 participants, and the Phase 3 trial NCT00665223 enrolled 437 participants. Both studies were randomized, double-blind, and placebo-controlled, and included adults aged 30 years and older.