A Randomised Controlled Trial, Of N-Acetyl Cysteine (NAC), for Premanifest Huntingtin Gene Expansion Carriers

Trial statusRecruiting
Trial phasePhase 2
Trial typeInterventional
Biological sexAll
Age18+
SponsorWestern Sydney Local Health District

About this trial

NAC-preHD is a phase II randomized placebo controlled study of oral NAC among premanifest HD gene expansion carriers, with clinical and radiological outcome at three years.

Eligibility criteria

This trial does not accept healthy volunteers

Qualifiers

Able to provide informed consent

Huntingtin gene expansion carrier with >= 39 CAG repeats

Absence of unequivocal motor signs of HD - that is, UHDRS

Diagnostic Confidence Level needs to be <4 upon enrolment

Disqualifiers

Diagnosis of clinical HD

Known hypersensitivity to NAC

Pregnancy, breastfeeding or intention to do so prior to the end of the study

Exposure to any investigational drugs within 30 days of Baseline Visit

Trial design

Design model

Parallel

Treatments tested in this trial

  • NAC

    Drug

    1g of clinical grade N-Acetylcysteine capsules, taken orally twice a day

  • Placebo

    Drug

    Coated Placebo capsules, manufactured to match appearance and taste, taken orally twice a day

Treatment groups

160 Participants
are divided into 2 treatment groups
Group A: NACExperimental treatment 1 intervention
Group B: PlaceboPlacebo comparator 1 intervention

Trial outcomes

Primary outcomes

1

Caudate Atrophy Rate on volumetric MRI

Blinded assessment

Time frame
Baseline through end of study (up to 3 years)
2

Rate of motor phenoconversion

Defined by conversion to Diagnostic Confidence Level 4, upon blinded assessment using the UHDRS motor subscale

Time frame
Baseline through end of study (up to 3 years)

Secondary outcomes

1

UHDRS motor subscale (total score)

Measuring changes in motor function

Time frame
Baseline through end of study (up to 3 years)
2

Stroop Word

Change in cognition as measured by Stroop Word

Time frame
Baseline through end of study (up to 3 years)
3

Trail Making Test

Change in cognition as measured by Trail Making Test

Time frame
Baseline through end study (up to 3 years)
4

Montreal Cognitive Assessment

Change in cognition as measured by Montreal Cognitive Assessment

Time frame
Baseline through end of study (up to 3 years)

Other outcomes

Sponsors and contacts

Click on the lead sponsor to view all of their trials.

Western Sydney Local Health District

Lead sponsor

Deakin University

Collaborator

Monash University

Collaborator

Royal Perth Hospital

Collaborator

The University of Queensland

Collaborator

University of Melbourne

Collaborator