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Pilot Study of the Evaluation of Subconjunctival Sirolimus in the Treatment of Bilateral GA Associated With AMD (SIRGA)

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
National Institutes of Health Clinical Center (CC) ( National Eye Institute (NEI) )
ClinicalTrials.gov Identifier:
NCT00766649
First received: October 3, 2008
Last updated: April 7, 2014
Last verified: April 2014
  Purpose

This study will determine if a drug called sirolimus is safe to give to people with geographic atrophy GA and if it can help preserve vision in patients. GA is an advanced form of dry age-related macular degeneration (AMD). AMD affects the macula, the central part of the retina needed for sharp, clear vision. There are two types of AMD, wet and dry. In dry AMD, cells in the macula die.GA may at least partly be caused by inflammation. Sirolimus helps prevent inflammation and therefore may help treat GA.

People with GA in both eyes with visual acuity between 20/20 and 20/400 in each eye may be eligible for this study. Participants undergo the following tests and procedures:

  • Sirolimus injections in the study eye at each 3-month clinic visit. The drug is injected under the outer layer of the eye after the patient receives antiseptic and numbing drops. Antibiotic drops are continued for 2 days after the injection.
  • Eye examinations before the first injection, 1 month after the first injection, during each clinic visit (11 to 15 visits over 2 to 3 years) and 3 months after the final injection. The examination includes testing visual acuity, measuring eye pressure and checking eye movements. To examine the inside of the eye, the pupil is dilated with eye drops. Regular photographs of the inside of the eye and optical coherence tomography photographs, which allow measurement of the thickness of the retina, may be taken during the eye examination.
  • Autofluorescence imaging. The patient sits in a chair with his or her head placed in a chin rest in front of a camera. A light in the camera is used to scan the eye.
  • Blood tests. Blood is drawn at the first visit and at up to seven study visits to check blood chemistries, such as liver and kidney function.
  • Urine pregnancy test for women who are able to become pregnant.

Condition Intervention Phase
Age-Related Macular Degeneration
Drug: Sirolimus
Phase 1
Phase 2

Study Type: Interventional
Study Design: Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Pilot Study of the Evaluation of Subconjunctival Sirolimus in the Treatment of Bilateral Geographic Atrophy Associated With Age-Related Macular Degeneration

Resource links provided by NLM:


Further study details as provided by National Institutes of Health Clinical Center (CC):

Primary Outcome Measures:
  • Rate of Change in Area of Geographic Atrophy (GA) in the Study Eye at 24 Months as Compared to Baseline [ Time Frame: Baseline and Month 24 ] [ Designated as safety issue: No ]
    One Macular Photocoagulation Study Disc Area (MPS DA) is equivalent to 1.77 mm^2 on the retina.

  • Rate of Change in Area of Geographic Atrophy (GA) in the Fellow Eye at 24 Months as Compared to Baseline [ Time Frame: Baseline and Month 24 ] [ Designated as safety issue: No ]
    One Macular Photocoagulation Study Disc Area (MPS DA) is equivalent to 1.77 mm^2 on the retina.


Secondary Outcome Measures:
  • Number of Study Eyes With a 15 Letter Drop From Baseline at 24 Months [ Time Frame: Baseline and Month 24 ] [ Designated as safety issue: No ]
    Visual acuity was measured using the Early Treatment Diabetic Retinopathy Study (ETDRS) protocol. Acuity is measured as letters read on an ETDRS eye chart and the letters read equate to Snellen measurements. For example, if a participant reads between 84 and 88 letters, the equivalent Snellen measurement is 20/20.

  • Absolute Change in Total Area of Geographic Atrophy (GA) in the Study Eye at 24 Months as Compared to Baseline [ Time Frame: Baseline and Month 24 ] [ Designated as safety issue: No ]

    Geographic atrophy (GA) is the death of photoreceptors and surrounding cells in the retina. The death of these photoreceptors results in lesions that cause vision loss. The area of GA was determined using planimetry for color stereoscopic fundus images by masked graders at the Doheny Image Reading Center (University of Southern California, Los Angeles, CA).

    This outcome measure was calculated by subtracting the GA value for the study eye at baseline from the GA value for the study eye at Month 24.

    One Macular Photocoagulation Study Disc Area (MPS DA) is equivalent to 1.77 mm^2 on the retina.


  • Absolute Change in Total Area of Geographic Atrophy (GA) in the Fellow Eye at 24 Months as Compared to Baseline [ Time Frame: Baseline and Month 24 ] [ Designated as safety issue: No ]

    Geographic atrophy (GA) is the death of photoreceptors and surrounding cells in the retina. The death of these photoreceptors results in lesions that cause vision loss. The area of GA was determined using planimetry for color stereoscopic fundus images by masked graders at the Doheny Image Reading Center (University of Southern California, Los Angeles, CA).

    This outcome measure was calculated by subtracting the GA value for the fellow eye at baseline from the GA value for the study eye at Month 24.

    One Macular Photocoagulation Study Disc Area (MPS DA) is equivalent to 1.77 mm^2 on the retina.


  • Relative Change in Total Area of Geographic Atrophy (GA) in the Study Eye at 24 Months as Compared to Baseline [ Time Frame: Baseline to Month 24 ] [ Designated as safety issue: No ]

    Geographic atrophy (GA) is the death of photoreceptors and surrounding cells in the retina. The death of these photoreceptors results in lesions that cause vision loss. The area of GA was determined using planimetry for color stereoscopic fundus images by masked graders at the Doheny Image Reading Center (University of Southern California, Los Angeles, CA).

    This outcome measure was calculated by dividing the absolute change in the total area of GA in the study eye at 24 months by the baseline value.

    One Macular Photocoagulation Study Disc Area (MPS DA) is equivalent to 1.77 mm^2 on the retina. As the unit of measure for both the absolute change in the total area of GA and the baseline value for the total area of GA is MPS DA, the unit of measure for the relative change in the total area of GA is "ratio."


  • Relative Change in Total Area of Geographic Atrophy (GA) in the Fellow Eye at 24 Months as Compared to Baseline [ Time Frame: Baseline and Month 24 ] [ Designated as safety issue: No ]

    Geographic atrophy (GA) is the death of photoreceptors and surrounding cells in the retina. The death of these photoreceptors results in lesions that cause vision loss. The area of GA was determined using planimetry for color stereoscopic fundus images by masked graders at the Doheny Image Reading Center (University of Southern California, Los Angeles, CA).

    This outcome measure was calculated by dividing the absolute change in the total area of GA in the fellow eye at 24 months by the baseline value.

    One Macular Photocoagulation Study Disc Area (MPS DA) is equivalent to 1.77 mm^2 on the retina. As the unit of measure for both the absolute change in the total area of GA and the baseline value for the total area of GA is MPS DA, the unit of measure for the relative change in the total area of GA is "ratio."


  • Change in Total Area of Drusen in the Study Eye at 24 Months as Compared to Baseline [ Time Frame: Baseline and Month 24 ] [ Designated as safety issue: No ]

    The total area occupied by drusen was determined using planimetry for color stereoscopic fundus images by masked graders at the Doheny Image Reading Center (University of Southern California, Los Angeles, CA).

    One Macular Photocoagulation Study Disc Area (MPS DA) is equivalent to 1.77 mm^2 on the retina.


  • Change in Total Area of Drusen in the Fellow Eye at 24 Months as Compared to Baseline [ Time Frame: Baseline and Month 24 ] [ Designated as safety issue: No ]

    The total area occupied by drusen was determined using planimetry for color stereoscopic fundus images by masked graders at the Doheny Image Reading Center (University of Southern California, Los Angeles, CA).

    One Macular Photocoagulation Study Disc Area (MPS DA) is equivalent to 1.77 mm^2 on the retina.


  • Change in Drusen Volume as Measured by Optical Coherence Tomography (OCT) at 24 Months as Compared to Baseline [ Time Frame: Baseline and Month 24 ] [ Designated as safety issue: No ]
  • Change in Photoreceptor Outer Segment (PROS) Thickness as Measured by Optical Coherence Tomography at 24 Months as Compared to Baseline [ Time Frame: Baseline and Month 24 ] [ Designated as safety issue: No ]

Enrollment: 11
Study Start Date: October 2008
Study Completion Date: July 2012
Primary Completion Date: April 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Sirolimus
Participants receive a 20 μL (440 μg) subconjunctival injection of sirolimus in the study eye at baseline and every three months thereafter.
Drug: Sirolimus
Participants receive a 20 μL (440 μg) subconjunctival injection of sirolimus in the study eye at baseline and every three months thereafter.
Other Names:
  • Rapamune®
  • rapamycin

Detailed Description:

Objective: Age-related macular degeneration (AMD), the leading cause of blindness in people over age 55 in the United States, is a heterogeneous clinical entity in which retinal degeneration occurs predominantly in the macula in the context of aging and leads to impairment of central visual acuity. AMD occurs in two general forms, one of which involves choroidal neovascularization (CNV) with subsequent formation of a disciform scar. This is often referred to as the neovascular or "wet" form. A second form, the subject of this study, is termed "dry" or atrophic macular degeneration and involves a constellation of clinical features that can include drusen, pigment clumping and/or retinal pigment epithelium (RPE) dropout and geographic atrophy (GA). GA can begin as a thinning of the RPE with involvement of the underlying choriocapillaris and lead subsequently to an atrophic change in the macula. Inflammation may play a role in the pathogenesis of GA. Sirolimus inhibits the production, signaling and activity of many inflammatory factors relevant to the development of GA. Therefore, the objective of this study is to investigate the safety and possible efficacy of multiple sirolimus subconjunctival injections in participants with bilateral GA.

Study Population: Ten participants with bilateral GA associated with AMD, with the potential to replace up to five participants if some fail to reach one year of follow-up.

Design: In this controlled, unmasked, Phase I/II study, one eye of eligible participants will be randomized to treatment while the fellow eye will be observed. Participants will receive a 20 μL (440 μg) subconjunctival injection of sirolimus in the study eye at baseline and every three months thereafter. The study will be completed once all participants have received two years of study medication and follow-up.

Outcome Measures: The primary outcome is the rate of change in area of GA, based on masked grading by an external Reading Center, of fundus photography in the study eye and fellow eye at two years compared with baseline. Secondary outcomes will include worsening of best-corrected visual acuity (BCVA) of three or more lines (15 or more letters), changes in area of GA as measured on autofluorescence, changes in drusen volume as measured by optical coherence tomography, changes in photoreceptor outer segment (PROS) thickness as measured by optical coherence tomography, as well as changes in drusen area based on masked digital grading of fundus photographs. Safety outcomes will include the number and severity of systemic and ocular toxicities, adverse events and infections.

  Eligibility

Ages Eligible for Study:   55 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria

  1. Participant must be older than 55 years of age.
  2. Participant must understand and sign the protocol's informed consent document.
  3. Participant must have at least ½ disc area (approximately 1 mm^2) of GA compatible with AMD present in each eye. GA is defined as one or more well-defined, usually more or less circular patches of partial or complete de-pigmentation of the RPE, typically with exposure of underlying choroidal blood vessels. Even if much of the RPE appears to be preserved and large choroidal vessels are not visible, a round patch of RPE partial de-pigmentation may still be classified as early GA. The GA in each eye must be able to be photographed in their entirety.
  4. Participant must have at least one large druse (more than or equal to 125 μm) in each eye.
  5. Participant must have a steady fixation in both eyes in the foveal or parafoveal area and media clear enough for good quality photographs. This will permit randomization.
  6. Participant must have visual acuity between 20/20 and 20/400 in each eye.
  7. Female participants must be considered post-menopausal and must not be breast-feeding. Female participants over age 55 who have not had a period for one year will be considered post-menopausal.

Exclusion Criteria

  1. Participant is in another investigational study and actively receiving study therapy.
  2. Participant is unable to comply with study procedures or follow-up visits.
  3. Participant has evidence of ocular disease other than AMD in either eye that may confound the outcome of the study (e.g., diabetic retinopathy with 10 or more hemorrhages or microaneurysms, uveitis, pseudovitelliform macular degeneration moderate/severe myopia).
  4. Participant has any of the following: a) a history of macular laser, b) a history of photodynamic therapy (PDT), c) received an intravitreal injection of anti-vascular endothelial growth factor (VEGF) agent for wet/exudative AMD at any point, d) received an intravitreal injection of any other agent (not an anti-VEGF agent) within four months prior to study enrollment or e) received topical treatment of any agent for advanced AMD within one month prior to enrollment. Participants currently taking or who have previously taken AREDS vitamin supplementation are not excluded.
  5. Participant has had a vitrectomy.
  6. Participant is expected to need ocular surgery during the course of the trial.
  7. Participant has undergone lens removal in the last three months or yttrium aluminum garnet (YAG) laser capsulotomy within the last month.
  8. Participant is on chemotherapy.
  9. Participant is on immunosuppressive medication.
  10. Participant is on ocular or systemic medications known to be toxic to the lens, retina or optic nerve.
  11. Participant with a history of ocular herpes simplex virus (HSV).
  12. A condition that, in the opinion of the investigator, would preclude participation in the study (e.g., unstable medical status including blood pressure and glycemic control).
  13. History of cancer (other than a non-melanoma skin cancer) diagnosed within the past five years.
  14. Laboratory values outside normal limits and considered clinically significant by the investigator.
  15. Participant is currently taking one of the following drugs: amprenavir, atazanavir, clarithromycin, darunavir, delavirdine, erythromycin, fluconazole (at doses of 200 mg or greater), fluvoxamine, indinavir, itraconazole, ketoconazole, nefazodone, nelfinavir, posaconazole, quinupristin, ritonavir, saquinavir, telithromycin, troleandomycin, verapamil or voriconazole.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00766649

Locations
United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
Investigators
Principal Investigator: Wai T. Wong, MD, PhD National Eye Institute (NEI)
  More Information

Publications:
Responsible Party: National Institutes of Health Clinical Center (CC) ( National Eye Institute (NEI) )
ClinicalTrials.gov Identifier: NCT00766649     History of Changes
Other Study ID Numbers: 090008, 09-EI-0008
Study First Received: October 3, 2008
Results First Received: April 15, 2013
Last Updated: April 7, 2014
Health Authority: United States: Federal Government
United States: Food and Drug Administration

Keywords provided by National Institutes of Health Clinical Center (CC):
Age Related Macular Degeneration (AMD)
Geographic Atrophy
Sirolimus
Age-Related Macular Degeneration
AMD

Additional relevant MeSH terms:
Geographic Atrophy
Macular Degeneration
Eye Diseases
Retinal Degeneration
Retinal Diseases
Everolimus
Sirolimus
Anti-Bacterial Agents
Anti-Infective Agents
Antibiotics, Antineoplastic
Antifungal Agents
Antineoplastic Agents
Immunologic Factors
Immunosuppressive Agents
Pharmacologic Actions
Physiological Effects of Drugs
Therapeutic Uses

ClinicalTrials.gov processed this record on November 25, 2014