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A Study of the Structure and Function of the Retina in Adult Patients With Refractory Complex Partial Seizures Treated With Vigabatrin (Sabril®)

This study is currently recruiting participants. (see Contacts and Locations)
Verified November 2014 by Lundbeck LLC
Sponsor:
Information provided by (Responsible Party):
Lundbeck LLC
ClinicalTrials.gov Identifier:
NCT01278173
First received: January 14, 2011
Last updated: November 5, 2014
Last verified: November 2014

January 14, 2011
November 5, 2014
December 2010
September 2015   (final data collection date for primary outcome measure)
  • Change from reference value in field width as measured by 30-2 SITA Fast in field sensitivity (Mean Deviation - MD in dB) [ Time Frame: Baseline (Month 0), Month 3, Month 6, Month 9, Month 12 ] [ Designated as safety issue: Yes ]
  • Change from reference value in average RNFL thickness (µm) as measured by SD-OCT [ Time Frame: Baseline (Month 0), Month 3, Month 6, Month 9, Month 12 ] [ Designated as safety issue: Yes ]
    Potential changes in retinal function, as assessed by static perimetry, tangent corner test, visual acuity and color vision, during the first year of exposure to Sabril will be correlated with clinical changes in average retinal nerve fiber layer thickness (RNFL), as assessed by SD-OCT.
  • Change from reference value in field width as measured by static perimetry: 30-2 Mean Deviation (MD) sensitivity (in dB) [ Time Frame: Baseline (Month 0), Month 3, Month 6, Month 9, Month 12 ] [ Designated as safety issue: Yes ]
  • Change from reference value as measured by SD-OCT: RNFL thickness [ Time Frame: Baseline (Month 0), Month 3, Month 6, Month 9, Month 12 ] [ Designated as safety issue: Yes ]
  • Change from reference value in field width as measured by static perimetry: full field horizontal meridian (in degrees) [ Time Frame: Baseline (Month 0), Month 3, Month 6, Month 9, Month 12 ] [ Designated as safety issue: Yes ]
  • Change from reference value as measured by SD-OCT: Macular thickness [ Time Frame: Baseline (Month 0), Month 3, Month 6, Month 9, Month 12 ] [ Designated as safety issue: Yes ]
Complete list of historical versions of study NCT01278173 on ClinicalTrials.gov Archive Site
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A Study of the Structure and Function of the Retina in Adult Patients With Refractory Complex Partial Seizures Treated With Vigabatrin (Sabril®)
A Prospective, Open-label Study of the Structure and Function of the Retina in Adult Patients With Refractory Complex Partial Seizures Treated With Vigabatrin (Sabril®)

The purpose of the study is to evaluate the change in visual fields by means of automated static perimetry and to evaluate the change in retinal structure by means of spectral domain optical coherence tomography (SD-OCT) in adult patients with refractory complex partial seizures (CPS) being treated with vigabatrin (Sabril®)

Multicenter, prospective open-label study with approximately 25 sites in the US that specialize in caring for adult patients with refractory CPS

  • Sites must have access to Humphrey static perimetry and to Spectralis SD-OCT.
  • All vision test results will be sent to the central readers for evaluation.
  • Additional study tests:

    • The Columbia Suicide Severity Rating Scale (C-SSRS)
    • The National Eye Institute Visual Field Questionnaire-39 (NEI VFQ-39)
    • A whole blood sample for specific analysis of DNA characteristics
    • An optional whole blood sample for exploratory analysis of DNA characteristics
    • Plasma samples for bioanalytical analysis of vigabatrin and blood samples for taurine biomarker analysis
Interventional
Phase 4
Endpoint Classification: Safety Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Supportive Care
Adult Refractory Complex Partial Seizures
Drug: Sabril
Sabril: 500 mg tablets, orally. Physicians will dose their patients according to guidance provided in the product label.
Other Name: Vigabatrin
Sabril
Intervention: Drug: Sabril
Not Provided

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Recruiting
80
Not Provided
September 2015   (final data collection date for primary outcome measure)

Important Inclusion Criteria:

  1. The patient speaks English or Spanish.
  2. The patient has had no prior exposure to Sabril.
  3. To begin Sabril therapy for the treatment of CPS.
  4. Male or female ≥18 years of age.
  5. The patient has refractory CPS:

    1. The patient has complex partial epilepsy of more than 1 year duration and no other seizure type within the past year except for partial seizures secondarily generalized.
    2. The patient has failed because of lack of efficacy 3 or more prior or concurrent treatment trials including 3 or more anti-epileptic drugs (AEDs) of differing pharmacologic mechanisms administered as monotherapy or polytherapy.
    3. The patient is taking at least 1 AED. A vagal nerve stimulator is not counted as an AED.
    4. The patient reports an average of 2 or more seizures per month averaged over the prior 3 months.
  6. The patient is deemed by the treating neurologist and ophthalmologist to be able to reliably complete perimetry testing.
  7. The initial (Visit 1) SD-OCT and static perimetry readings tests must be performed and assessed for technical adequacy by the SD-OCT and perimetry central readers prior to the first dose of Sabril. The initial (Visit 1) tangent corner test must be performed prior to the first dose of Sabril.

Exclusion Criteria:

  1. Prior exposure to Sabril.
  2. Pre-existing ocular or neurological disease that might affect bilateral visual fields or interfere with perimetry (e.g., aphakia, visually significant cataract, glaucoma, diabetes mellitus, ischemic optic neuropathy, multiple sclerosis). Patients with stable visual field defects from CNS lesions (e.g., epilepsy surgery more than 6 months prior to receiving Sabril) may be enrolled.
  3. Concurrent exposure to medications with known or suspected retinal or optic nerve toxicity.
  4. Concurrent use of an investigational agent or device or such use within 30 days of entering the study.
  5. Concurrent use of the ketogenic or similar diet.
  6. For any reason, the patient is considered by the investigator to be an unsuitable candidate for the study.
Both
18 Years and older
No
Contact: Email contact via H. Lundbeck A/S LundbeckClinicalTrials@lundbeck.com
United States
 
NCT01278173
13098A
No
Lundbeck LLC
Lundbeck LLC
Not Provided
Study Director: Email contact via H. Lundbeck A/S LundbeckClinicalTrials@lundbeck.com
Lundbeck LLC
November 2014

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