LCA: Phase I Trial of Gene Vector to Patients With Retinal Disease Due to RPE65 Mutations
Study Details
Study Description
Brief Summary
A recombinant adeno-associated virus serotype 2 (rAAV2) vector has been altered to carry the human RPE65 (hRPE65) gene. This vector has been shown to restore vision in animal models that resemble human RPE65-associated Leber congenital amaurosis (LCA), an incurable retinal degeneration that causes severe vision loss. The proposed study is an open label, Phase I clinical trial of subretinal rAAV2-CBSB-hRPE65 administration to individuals with RPE65-associated retinal disease. Five cohorts will be included in this trial. Cohorts 1, 2 and 4 will consist of individuals 18 years of age and older. Cohorts 3 and 5 will consist of individuals between the ages of 8 and 17, inclusive. Enrollment in Cohorts 3 and 5 will begin only after confirming the safety of rAAV2-CBSB-hRPE65 administration in the older groups of participants. This trial will lead to a greater understanding of the safety and thereby potential value of gene transfer in RPE65-associated retinal disease and will have implications for other forms of retinal degenerative disease amenable to this type of intervention.
The goal of this clinical trial is to determine the safety of uniocular subretinal administration of rAAV2-CBSB-hRPE65 in individuals with RPE65-associated retinal disease. Ocular and systemic toxicity will be assessed prior to and following vector administration to determine if there are adverse changes that may be associated with vector administration.
Condition or Disease | Intervention/Treatment | Phase |
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Phase 1 |
Study Design
Arms and Interventions
Arm | Intervention/Treatment |
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Experimental: Experimental All clinical trial subjects received the same vector. |
Genetic: rAAV2-CBSB-hRPE65
One or two, uniocular, subretinal injections; relative doses: 0.3X (Cohort 1), 0.6X (Cohort 2), 0.45X (Cohort 3), 0.9X (Cohorts 4 and 5)
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Outcome Measures
Primary Outcome Measures
- The primary safety endpoint in this trial is the standard ocular examination. Toxicity will also be assessed by measurement of vision, hematology and serum chemistries, assays for vector genomes, reported subject history of symptoms and adverse events. [15 years]
Secondary Outcome Measures
- Visual function will be quantified prior to and after vector administration in order to determine whether vector administration affects visual function. [15 years]
Eligibility Criteria
Criteria
Inclusion Criteria:
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RPE65-associated retinal disease (two disease-causing RPE65 mutations);
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Clinical diagnosis of Leber congenital amaurosis (LCA)/early-onset retinal degeneration (EORD) and of severely impaired visual and retinal function, and best corrected visual acuity of 20/40 or worse in the study eye;
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Ability to perform tests of visual and retinal function;
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Visible photoreceptor layer on a standard OCT scan;
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Good general health;
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Ability to comply with research procedures;
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Specific for Cohorts 1, 2 and 4: 18 years of age and older;
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Specific for Cohorts 3 and 5: Between 8 and 17 years of age, inclusive.
Exclusion Criteria:
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AAV antibody titers greater than two standard deviations above normal at baseline;
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Humoral immune deficiency as evidenced by low tetanus toxoid IgG antibody titers;
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Pre-existing eye conditions that would preclude the planned surgery or interfere with the interpretation of study endpoints or surgical complications;
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Complicating systemic diseases;
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Use of anti-platelet agents that may alter coagulation within 7 days prior to study agent administration;
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Use of immunosuppressive medications;
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Pregnancy or breastfeeding;
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Individuals (males and females) of childbearing potential who are unwilling to use effective contraception;
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Any condition that would prevent a subject from completing follow-up examinations during the course of the study;
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Any condition that makes the subject unsuitable for the study;
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Current, or recent participation, in any other research protocol involving investigational agents or therapies;
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Recent receipt of an investigational biologic therapeutic agent.
Contacts and Locations
Locations
Site | City | State | Country | Postal Code | |
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1 | Shands Children's Hospital, University of Florida | Gainesville | Florida | United States | 32610 |
2 | Scheie Eye Institute, University of Pennsylvania | Philadelphia | Pennsylvania | United States | 19104 |
Sponsors and Collaborators
- University of Pennsylvania
- National Eye Institute (NEI)
Investigators
- Principal Investigator: Samuel G. Jacobson, MD, PhD, University of Pennsylvania
Study Documents (Full-Text)
None provided.More Information
Publications
- Acland GM, Aguirre GD, Bennett J, Aleman TS, Cideciyan AV, Bennicelli J, Dejneka NS, Pearce-Kelling SE, Maguire AM, Palczewski K, Hauswirth WW, Jacobson SG. Long-term restoration of rod and cone vision by single dose rAAV-mediated gene transfer to the retina in a canine model of childhood blindness. Mol Ther. 2005 Dec;12(6):1072-82. Epub 2005 Oct 14.
- Acland GM, Aguirre GD, Ray J, Zhang Q, Aleman TS, Cideciyan AV, Pearce-Kelling SE, Anand V, Zeng Y, Maguire AM, Jacobson SG, Hauswirth WW, Bennett J. Gene therapy restores vision in a canine model of childhood blindness. Nat Genet. 2001 May;28(1):92-5.
- Cideciyan AV. Leber congenital amaurosis due to RPE65 mutations and its treatment with gene therapy. Prog Retin Eye Res. 2010 Sep;29(5):398-427. doi: 10.1016/j.preteyeres.2010.04.002. Epub 2010 Apr 24. Review.
- Jacobson SG, Acland GM, Aguirre GD, Aleman TS, Schwartz SB, Cideciyan AV, Zeiss CJ, Komaromy AM, Kaushal S, Roman AJ, Windsor EA, Sumaroka A, Pearce-Kelling SE, Conlon TJ, Chiodo VA, Boye SL, Flotte TR, Maguire AM, Bennett J, Hauswirth WW. Safety of recombinant adeno-associated virus type 2-RPE65 vector delivered by ocular subretinal injection. Mol Ther. 2006 Jun;13(6):1074-84. Epub 2006 Apr 27.
- Jacobson SG, Aleman TS, Cideciyan AV, Heon E, Golczak M, Beltran WA, Sumaroka A, Schwartz SB, Roman AJ, Windsor EA, Wilson JM, Aguirre GD, Stone EM, Palczewski K. Human cone photoreceptor dependence on RPE65 isomerase. Proc Natl Acad Sci U S A. 2007 Sep 18;104(38):15123-8. Epub 2007 Sep 11.
- Jacobson SG, Aleman TS, Cideciyan AV, Roman AJ, Sumaroka A, Windsor EA, Schwartz SB, Heon E, Stone EM. Defining the residual vision in leber congenital amaurosis caused by RPE65 mutations. Invest Ophthalmol Vis Sci. 2009 May;50(5):2368-75. doi: 10.1167/iovs.08-2696. Epub 2008 Dec 30.
- Jacobson SG, Aleman TS, Cideciyan AV, Sumaroka A, Schwartz SB, Windsor EA, Traboulsi EI, Heon E, Pittler SJ, Milam AH, Maguire AM, Palczewski K, Stone EM, Bennett J. Identifying photoreceptors in blind eyes caused by RPE65 mutations: Prerequisite for human gene therapy success. Proc Natl Acad Sci U S A. 2005 Apr 26;102(17):6177-82. Epub 2005 Apr 18.
- Jacobson SG, Boye SL, Aleman TS, Conlon TJ, Zeiss CJ, Roman AJ, Cideciyan AV, Schwartz SB, Komaromy AM, Doobrajh M, Cheung AY, Sumaroka A, Pearce-Kelling SE, Aguirre GD, Kaushal S, Maguire AM, Flotte TR, Hauswirth WW. Safety in nonhuman primates of ocular AAV2-RPE65, a candidate treatment for blindness in Leber congenital amaurosis. Hum Gene Ther. 2006 Aug;17(8):845-58.
- Jacobson SG, Cideciyan AV, Aleman TS, Sumaroka A, Windsor EA, Schwartz SB, Heon E, Stone EM. Photoreceptor layer topography in children with leber congenital amaurosis caused by RPE65 mutations. Invest Ophthalmol Vis Sci. 2008 Oct;49(10):4573-7. doi: 10.1167/iovs.08-2121. Epub 2008 Jun 6.
- Jacobson SG, Cideciyan AV. Treatment possibilities for retinitis pigmentosa. N Engl J Med. 2010 Oct 21;363(17):1669-71. doi: 10.1056/NEJMcibr1007685.
- 547233
- Grant: 1 U10 EY017280-01;
- UP IRB: 804582;
- UP IBC: 06-105;
- UF GCRC: 675;
- UF IBC RD: 2795;
- WIRB: 20061300