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A Randomized, Double-blind, Placebo-controlled Trial of Curcumin in Leber's Hereditary Optic Neuropathy (LHON)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00528151
Recruitment Status : Completed
First Posted : September 12, 2007
Last Update Posted : December 24, 2012
Information provided by:
Mahidol University

Tracking Information
First Submitted Date  ICMJE September 11, 2007
First Posted Date  ICMJE September 12, 2007
Last Update Posted Date December 24, 2012
Study Start Date  ICMJE May 2005
Primary Completion Date Not Provided
Current Primary Outcome Measures  ICMJE
 (submitted: September 11, 2007)
visual outcome [ Time Frame: 1 year ]
Original Primary Outcome Measures  ICMJE Same as current
Change History
Current Secondary Outcome Measures  ICMJE Not Provided
Original Secondary Outcome Measures  ICMJE Not Provided
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
Descriptive Information
Brief Title  ICMJE A Randomized, Double-blind, Placebo-controlled Trial of Curcumin in Leber's Hereditary Optic Neuropathy (LHON)
Official Title  ICMJE A Randomized, Double-blind, Placebo-controlled Trial of Curcumin in Leber's Hereditary Optic Neuropathy (LHON)
Brief Summary

Background Leber's Hereditary Optic Neuropathy (LHON) is a maternally inherited ocular disorder associated with a mutation in mtDNA . The common manifestation is visual loss which caused by the respiratory chain enzymes complex dysfunction resulting in increased oxidative stress enzymes production.

Purpose To determine whether curcumin which is an antioxidant agent is beneficial to the patients with 11778 LHON mutation.

Material and Method Seventy patients with 11778 LHON mutation were randomly treated with oral curcumin (500 mg/day) and placebo for 1 year. The visual acuity, computerized visual field, electrophysiologic parameters and oxidative stress enzymes in plasma were compared before and after treatment at 3, 6, and 12 months interval.

Detailed Description

Leber's hereditary optic neuropathy (LHON) is a maternally inherited disease that is characterized by a simultaneous or more common sequential bilateral loss of central vision, which typically occurs during the teenager years or early adulthood. The disease may be progressive and the patients eventually become blind. In contrast to blindness in patients caused by congenital diseases, the patients who develop blindness caused by LHON will have more trouble in their life because they previously had better vision. Although LHON is associated with mitochondrial DNA mutation at a variable nucleotide position but no certain mechanism of optic nerve injury has been found. It has been postulated that a defect in a complex of respiratory chain enzyme which is caused by mitochondrial DNA dysfunction, results in an increase of free radical substances that interfere with optic nerve function in LHON. Some antioxidant substances have been used to decrease the progression of visual impairment. However, there have been few therapeutic trials for LHON.

Curcumin, a component of tumeric, which comes from the root Curcumin longa has antioxidant, anti-inflammatory and anti-carcinogenic activities. There is some evidence which suggests that curcumin contributes to the in vitro removal of free radical gradients in thalassemic serum and to a clinical improvement of thalassemic patients. We propose a randomized controlled trial study of curcumin, which is an antioxidant substance, for LHON. This study will provide not only an insight into the therapeutic efficacy of curcumin, a kind of Thai herb, for LHON but also the development of future therapeutic strategies to prevent blindness.

Study Type  ICMJE Interventional
Study Phase  ICMJE Phase 3
Study Design  ICMJE Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Treatment
Condition  ICMJE Optic Atrophy, Hereditary, Leber
Intervention  ICMJE Drug: curcumin
curcumin 250 mg twice a day in the first group. placebo 1 capsule twice a day in the second group.
Study Arms  ICMJE Placebo Comparator: 2
  1. curcumin
  2. placebo
Intervention: Drug: curcumin
Publications * Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Recruitment Information
Recruitment Status  ICMJE Completed
Estimated Enrollment  ICMJE
 (submitted: September 11, 2007)
Original Estimated Enrollment  ICMJE Same as current
Actual Study Completion Date  ICMJE December 2007
Primary Completion Date Not Provided
Eligibility Criteria  ICMJE

Inclusion Criteria:

  • LHON patient with 11778 point mutation

Exclusion Criteria:

  • LHON patient with other point mutation
Sex/Gender  ICMJE
Sexes Eligible for Study: All
Ages  ICMJE 8 Years and older   (Child, Adult, Older Adult)
Accepts Healthy Volunteers  ICMJE Yes
Contacts  ICMJE Contact information is only displayed when the study is recruiting subjects
Listed Location Countries  ICMJE Thailand
Removed Location Countries  
Administrative Information
NCT Number  ICMJE NCT00528151
Other Study ID Numbers  ICMJE 123/2547
Has Data Monitoring Committee Yes
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement  ICMJE Not Provided
Responsible Party Not Provided
Study Sponsor  ICMJE Mahidol University
Collaborators  ICMJE Not Provided
Investigators  ICMJE
Principal Investigator: Professor Wanicha L Chuenkongkaew, MD Mahidol University
PRS Account Mahidol University
Verification Date August 2004

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP