Study of SAR421869 in Participants With Retinitis Pigmentosa Associated With Usher Syndrome Type 1B

• ClinicalTrials.gov Identifier: NCT01505062
• Recruitment Status: Terminated
• First Posted: January 6, 2012
• Results First Posted: March 18, 2020
• Last Update Posted: April 28, 2022
• Sponsor: Sanofi
• Information provided by (Responsible Party): Sanofi

Study Description

Brief Summary:

To evaluate the safety and tolerability of ascending doses of subretinal injections of SAR421869 in participants with Usher syndrome type 1B.

To evaluate for possible biological activity of SAR421869.

Condition or disease	Intervention/treatment	Phase
Usher Syndrome; Retinitis Pigmentosa	Drug: SAR421869	Phase 1; Phase 2

Detailed Description:

Following screening procedures, the gene transfer agent were injected once only under the retina by an opthalmic surgeon under anesthesia. Participants then had regular follow-up visits where general health examinations, blood tests and ophthalmic examinations including best corrected visual acuity, slit lamp examination, intraocular pressure, fundoscopy, autofluorescence, optical coherence tomography, perimetry and electroretinogram were undertaken.

At the end of the study, the participants were invited to enter in an open-label safety study for long-term follow-up visits (at least once every six months) including ophthalmological examinations and recording of adverse events (AEs) were continued for 5 years; then the Investigator followed the participants by telephone for a subsequent 10 years at a minimum interval of once a year to monitor delayed AEs.

Study Design

• Study Type: Interventional (Clinical Trial)
• Actual Enrollment: 9 participants
• Allocation: Non-Randomized
• Intervention Model: Single Group Assignment
• Masking: None (Open Label)
• Primary Purpose: Treatment
• Official Title: A Phase I/IIA Dose Escalation Safety Study of Subretinally Injected SAR421869, Administered to Patients With Retinitis Pigmentosa Associated With Usher Syndrome Type 1B
• Actual Study Start Date: March 26, 2012
• Actual Primary Completion Date: August 16, 2019
• Actual Study Completion Date: August 16, 2019

Arms and Interventions

Arm	Intervention/treatment
Experimental: SAR421869 (Cohort 1); Starting dose of SAR421869 given through one subretinal injection.	Drug: SAR421869; Formulation: Sterile suspension for intraocular injection, 100 microliters (μL) aliquots in 0.3 milliliter (mL) type I borosilicate glass 'V' vials with a butyl stopper and aluminum crimp seal. Route of administration: subretinal injection; Other Name: UshStat®
Experimental: SAR421869 (Cohort 2); Escalating dose of SAR421869 given through one subretinal injection.	Drug: SAR421869; Formulation: Sterile suspension for intraocular injection, 100 microliters (μL) aliquots in 0.3 milliliter (mL) type I borosilicate glass 'V' vials with a butyl stopper and aluminum crimp seal. Route of administration: subretinal injection; Other Name: UshStat®
Experimental: SAR421869 (Cohort 3); Escalating dose of SAR421869 given through one subretinal injection.	Drug: SAR421869; Formulation: Sterile suspension for intraocular injection, 100 microliters (μL) aliquots in 0.3 milliliter (mL) type I borosilicate glass 'V' vials with a butyl stopper and aluminum crimp seal. Route of administration: subretinal injection; Other Name: UshStat®
Experimental: SAR421869 (Cohort 4); Maximum tolerated dose (MTD) of SAR421869 given through one subretinal injection.	Drug: SAR421869; Formulation: Sterile suspension for intraocular injection, 100 microliters (μL) aliquots in 0.3 milliliter (mL) type I borosilicate glass 'V' vials with a butyl stopper and aluminum crimp seal. Route of administration: subretinal injection; Other Name: UshStat®
Experimental: SAR421869 (Cohort 5); MTD of SAR421869 given through one subretinal injection.	Drug: SAR421869; Formulation: Sterile suspension for intraocular injection, 100 microliters (μL) aliquots in 0.3 milliliter (mL) type I borosilicate glass 'V' vials with a butyl stopper and aluminum crimp seal. Route of administration: subretinal injection; Other Name: UshStat®

Outcome Measures

Primary Outcome Measures :

1. Percentage of Participants With Treatment-emergent Adverse Events (TEAEs) [ Time Frame: From Baseline to Week 48 ]
   An adverse event (AE) was any unfavorable and unintended physical sign, symptom, or laboratory parameter that developed or worsened in severity during the course of the study, whether or not considered related to the IMP. The TEAEs were defined as any event that started or increased in severity after the participant received IMP, including abnormal laboratory results, electrocardiogram, etc.
2. Percentage of Participants With TEAEs by Severity [ Time Frame: From Baseline to Week 48 ]
   An AE was any unfavorable and unintended physical sign, symptom, or laboratory parameter that developed or worsened in severity during the course of the study, whether or not considered related to the IMP. The TEAEs were defined as any event that started or increased in severity after the participant received IMP, including abnormal laboratory results, electrocardiogram, etc. For each AE, the severity was categorized as either mild, moderate or severe where 'mild' was defined as discomfort noticed but did not interfere with the participant's daily routines (an annoyance), 'moderate' was defined as some impairment of function, not hazardous to health (uncomfortable or embarrassing), and 'severe' was defined as significant impairment of function, hazardous to health (incapacitating).

Eligibility Criteria

• Ages Eligible for Study: 6 Years and older (Child, Adult, Older Adult)
• Sexes Eligible for Study: All
• Accepts Healthy Volunteers: No

Criteria

Inclusion Criteria:

• Clinical and molecular diagnosis of Retinitis Pigmentosa associated with Usher Syndrome type 1B, caused by at least one pathogenic myosin 7a gene (MYO7A) mutation on both alleles, confirmed by direct sequencing and co-segregation analysis within the participant's family.
• Suitable verbal/auditory and/or tactile sign language communication (in the opinion of the investigator) as to allow written informed consent to be obtained.
• Women of childbearing potential had a negative pregnancy test at screening and at baseline, and agree to use an effective form of contraception such as the contraceptive pill or intra uterine device for at least three months following SAR421869 administration, or be surgically sterile or postmenopausal, with the last menstrual period being over two years prior to enrolment.
• Males of reproductive potential agreed with their partner to use two forms of contraception, including one barrier method for at least three months following SAR421869 administration if their partner was of childbearing capacity, or must be surgically sterile.
• Participants agreed to not donate blood, organs, tissues or cells for at least three months following SAR421869 administration.

Exclusion Criteria:

• Presence of significant ocular abnormalities in the study eye that in the opinion of the investigator would preclude the planned surgery, effective safety follow-up, or interfere with the interpretation of study outcome measures (e.g., glaucoma, corneal or significant lens opacities, pre-existing uveitis, intraocular infection, choroidal neovascularization).
• Any pre-existing factor or past history of eye disease in children that might predispose to an increased risk of surgical complications in the study eye (e.g., trauma, previous surgery, uveitis, congenital, developmental or structural abnormalities).
• Concomitant systemic diseases including those in which the disease itself, or the treatment for the disease, can alter ocular function (e.g., malignancies, diabetes, juvenile rheumatoid arthritis or sickle cell disease).
• Any contraindication to pupil dilation in either eye.
• Contraindications to use of anesthesia (local or general, as appropriate).
• Treatment with intravitreal, subtenon, or periocular steroid within 4 months of the screening visit.
• Any known allergy to any component of the delivery vehicle or diagnostic agents used during the study (e.g., fluorescein, dilation drops), or medications planned for use during the peri-operative period, particularly topical, injected or systemic corticosteroids.
• Life-threatening illness.
• Alcohol or other substance abuse.
• History of malignancy within a five year period or have had a positive cancer screening test within a one year period of the screening visit.
• Laboratory test abnormalities or abnormalities in electrocardiogram or chest X-ray, that in the opinion of the principal investigator, are clinically significant and would make the participant unsuitable for participation in the study.
• Intercurrent illness or infection 28 days prior to SAR421869 administration.
• Concurrent anti-retroviral therapy that would inactivate the investigational agent.
• Current treatment with immunosuppressant therapies.
• Pre-menopausal or non-surgically sterile women who were unwilling to use an effective form of contraception such as the contraceptive pill or intrauterine device.
• Men or women who did not agree to use barrier contraception as specified in the inclusion criteria.
• Pregnant or breastfeeding women.
• History of any investigational agent within 28 days prior to SAR421869 administration.
• Participation in a prior gene transfer therapy study.
• Enrolment in any other clinical study, for any condition, including those relating to Usher syndrome Type 1B, throughout the duration of the SAR421869 study.
• Current or anticipated treatment with anticoagulant therapy or the use of anticoagulation therapy within the four weeks prior to surgery.
• Past medical history of HIV, or hepatitis A, B or C.
• Inability to comply with the study protocol.
• Any ocular surgery including laser and cataract surgery with intraocular lens implantation, aphakia or prior vitrectomy, in the study eye within 6 months of screening.

Contacts and Locations

Locations

United States, Oregon

Investigational Site Number 840001

Portland, Oregon, United States, 97239-3098

France

Investigational Site Number 250001

Paris, France, 75012

Sponsors and Collaborators

Sanofi

Investigators

• Principal Investigator: Richard Weleber, MD; Casey Eye Institute, Portland, Oregon
• Principal Investigator: Jose-Alain Sahel, MD, PhD; Hopital Nationale des Quinze-Vingt, Paris France

  Study Documents (Full-Text)

Documents provided by Sanofi:

Study Protocol  [PDF] August 9, 2018

Statistical Analysis Plan  [PDF] July 22, 2016

More Information

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):

Zallocchi M, Binley K, Lad Y, Ellis S, Widdowson P, Iqball S, Scripps V, Kelleher M, Loader J, Miskin J, Peng YW, Wang WM, Cheung L, Delimont D, Mitrophanous KA, Cosgrove D. EIAV-based retinal gene therapy in the shaker1 mouse model for usher syndrome type 1B: development of UshStat. PLoS One. 2014 Apr 4;9(4):e94272. doi: 10.1371/journal.pone.0094272. eCollection 2014.

• Responsible Party: Sanofi
• ClinicalTrials.gov Identifier: NCT01505062
• Other Study ID Numbers: TDU13600; US1/001/10 ( Other Identifier: Oxford Biomedica )
• First Posted: January 6, 2012
• Results First Posted: March 18, 2020
• Last Update Posted: April 28, 2022
• Last Verified: March 2022

Individual Participant Data (IPD) Sharing Statement:

• Plan to Share IPD: Yes
• Plan Description: Qualified researchers may request access to patient level data and related study documents including the clinical study report, study protocol with any amendments, blank case report form, statistical analysis plan, and dataset specifications. Patient level data will be anonymized and study documents will be redacted to protect the privacy of trial participants. Further details on Sanofi's data sharing criteria, eligible studies, and process for requesting access can be found at: https://vivli.org

Keywords provided by Sanofi:

Usher Syndrome Retinitis Pigmentosa; Usher Syndrome associated Retinitis Pigmentosa

Additional relevant MeSH terms:

Usher Syndromes; Retinitis; Retinitis Pigmentosa; Syndrome; Disease; Pathologic Processes; Retinal Diseases; Eye Diseases; Eye Diseases, Hereditary; Retinal Dystrophies; Retinal Degeneration; Genetic Diseases, Inborn; Deaf-Blind Disorders; Deafness; Hearing Loss; Hearing Disorders; Ear Diseases; Otorhinolaryngologic Diseases; Hearing Loss, Sensorineural; Sensation Disorders; Neurologic Manifestations; Nervous System Diseases; Blindness; Vision Disorders; Abnormalities, Multiple; Congenital Abnormalities