Lipoic Acid as a Treatment for Acute Optic Neuritis

Phase 1

Completed

• Conditions: Optic Neuritis
• Interventions: Drug: Lipoic Acid

• Registration Number: NCT01294176
• Lead Sponsor: Oregon Health and Science University

Brief Summary

The purpose of this study is to determine if oral lipoic acid can safely help relieve permanent optic nerve injury in patients diagnosed with acute optic neuritis. It will also explore how the body absorbs and breaks down the study drug, and what effects it has on the immune system.

Detailed Description

Oral lipoic acid is an antioxidant that helps proteins work in the body. It is available in oral and intravenous formulations and has been used in the past to treat nerve damage like that seen in diabetes and some other metabolic disorders. It is available as a dietary supplement in the United States.

Patients with a diagnosis of acute optic neuritis who are enrolled in the study will undergo medical and nervous system examinations, and blood draws. The study doctor will take a medical history and perform physical examinations. Research assistants at the MS Center, who are trained in blood draws, will perform the blood draws. Patients will also undergo Optical coherence tomography (OCT) examination at Casey Eye Institute, and receive two MRIs at Oregon Health and Science University (OHSU). Because it is a placebo-controlled trial, subjects will have a 50:50 chance of receiving either placebo (inactive) or study drug. If enrolled in the study, patients will take two gel capsules of the study drug or placebo at the same time every day for six weeks.

Study Timeline

• Study First Submitted: 2010-08-10
• Study Start: 2011-01
• Study First Submitted QC: 2011-02-10
• Study First Posted: 2011-02-11
• Primary Completion: 2016-11
• Study Completion: 2016-11
• Status Verified: 2019-04
• Last Update Submitted: 2019-04-25
• Last Update Posted: 2019-04-26

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 31

Inclusion Criteria

• Diagnosis of acute, unilateral AON with visual symptoms (vision loss) of 14 days or less
• 18 - 65 years of age, inclusive
• AON as a first event (possibly idiopathic) or in relationship to clinically isolated syndrome or to MS according to McDonald criteria
• No previous history of optic neuritis or ophthalmoscopic signs of optic atrophy in the affected eye
• Subject is available for treatment initiation within 14 days of onset of AON symptoms

Exclusion Criteria

• Other causes of visual loss in the affected eye (e.g. amblyopia or glaucoma
• OCT is non-evaluable at screening visit due to edema.
• AON symptoms improve before administration of study medication.
• Subject has fever or active infection at time of enrollment.
• Subject is pregnant or breast-feeding.
• Subject has diabetes mellitus.
• Subject has another significant health problem (e.g. active coronary heart disease, liver disease, significant pulmonary disease).

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Oral Lipoic Acid	Lipoic Acid	Lipoic acid is a natural antioxidant available as an oral dietary supplement. A higher than average dose of 1200mg will be administered in this trial.
Avicel™	Lipoic Acid	The placebo is Avicel™ (microcellulose crystal) and 4.3 mg quercetin (a bioflavanoid).

Primary Outcome Measures

Name	Time	Method
The primary outcome measure will be the difference from baseline in retinal nerve fiber layer (RNFL) thickness of the affected optic nerve, as determined by OCT, at 12 and 24weeks post LA treatment.	Baseline, Week 24	Individual data will be assessed at the last study visit (six months post baseline). Group data cannot be assessed until all participants have exited the study. The time frame for final assessment of the primary outcome measure is dependent on how quickly the recruitment goal is met.

Secondary Outcome Measures

Name	Time	Method
Secondary outcome measures to assess optic nerve injury will be changes from baseline in the RNFL thickness at week 24, and changes from baseline in low- and high-contrast visual acuity, contrast sensitivity, and visual field changes at weeks 12 and 24.	Baseline, Week 24	Individual data will be assessed at the last study visit (six months post baseline). Group data cannot be assessed until all participants have exited the study. The time frame for final assessment of the primary outcome measure is dependent on how quickly the recruitment goal is met.

Trial Locations

Locations (1)

Oregon Health & Science University; 🇺🇸 Portland, Oregon, United States