A Dose Ranging Study to Evaluate the Safety and Potential Efficacy of rhNGF in Patients With Retinitis Pigmentosa (RP)

NCT ID: NCT02110225

Last Updated: 2024-04-18

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE1/PHASE2
• Total Enrollment: 50 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2014-01-31
• Study Completion Date: 2015-11-30

Brief Summary

The primary objective of the study is to assess the safety and tolerability of two dose regimens of recombinant human nerve growth factor (rhNGF) eye drops solution administered over 6 months versus a vehicle control in patients with typical retinitis pigmentosa. The secondary objective of this study is to attempt to show a dose response by assessing the potential efficacy of the rhNGF dose regimens for improving or slowing the deterioration of visual function outcomes at 3 and 6 months. During a 6 month follow-up period patients will be monitored to determine if there is evidence of a persistent biological effect after discontinuation of the study treatment.

Detailed Description

This is a 24-week phase Ib/II, multicenter, randomized, double-masked, vehicle controlled, parallel-group, dose-ranging study with a 24-week follow-up period to evaluate the safety and potential efficacy of two doses (60 μg/ml and 180 μg/ml) of recombinant human nerve growth factor (rhNGF) eye drops solution versus vehicle in patients with typical retinitis pigmentosa (RP).

Conditions

Retinitis Pigmentosa

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: QUADRUPLE

Study Groups

rhNGF 60µg/ml

rhNGF 60 µg/ml eye drops solution, one drop 3 times a day for 24 weeks in both eyes

Group Type: EXPERIMENTAL

rhNGF 60 µg/ml eye drops solution

Intervention Type: DRUG

rhNGF 60 µg/ml eye drops solution, one drop 3 times a day for 24 weeks in both eyes

rhNGF 180 µg/ml

rhNGF 180 µg/ml eye drops solution, one drop 3 times a day for 24 weeks in both eyes.

Group Type: EXPERIMENTAL

rhNGF 180 µg/ml eye drops solution

Intervention Type: DRUG

rhNGF 180 µg/ml eye drops solution, one drop 3 times a day for 24 weeks in both eyes

Vehicle

Placebo eye drops solution, one drop 3 times a day for 24 weeks in both eyes.

Group Type: PLACEBO_COMPARATOR

Placebo

Intervention Type: DRUG

Placebo eye drops solution, one drop 3 times a day for 24 weeks in both eyes

Interventions

rhNGF 60 µg/ml eye drops solution

rhNGF 60 µg/ml eye drops solution, one drop 3 times a day for 24 weeks in both eyes

Intervention Type: DRUG

rhNGF 180 µg/ml eye drops solution

rhNGF 180 µg/ml eye drops solution, one drop 3 times a day for 24 weeks in both eyes

Intervention Type: DRUG

Placebo

Placebo eye drops solution, one drop 3 times a day for 24 weeks in both eyes

Intervention Type: DRUG

Other Intervention Names

recombinant human nerve growth factor 60 µg/ml solution; recombinant human nerve growth factor 180 µg/ml solution; Vehicle

Eligibility Criteria

Inclusion Criteria

• Patients 18 years of age or older.
• Patients with typical forms of RP characterized by the following clinical features: classic fundus appearance (i.e. intraretinal pigment deposits, thinning and atrophy of the retinal pigment epithelium (RPE) in the mid- and far peripheral retina, with relative RPE preservation in the macula, waxy pallor of the optic disc, attenuation of the retinal vessels), reduced and delayed ERG responses, visual field constriction
• Best corrected distance visual acuity (BCDVA) score of ≥ 48 ETDRS letters (equivalent to 20/100 Snellen, +0.7 LogMar, or 0.2 decimal fraction) in either eye at the time of study enrollment.
• Documented evidence of disease progression within the 12 months prior to enrollment in the study as demonstrated by ERG (≥20% decrease in b wave amplitude in scotopic conditions or ≥25% in photopic conditions) and/or visual field testing (≥10% of Goldman Visual Field expressed as area square or ≥3 dB decrease of Humphrey Visual Field Mean Deviation).
• Only patients who satisfy all Informed Consent requirements may be included in the study. The patient and/or his/her impartial witness must read, sign and date the Informed Consent document before any study-related procedures are performed. The Informed Consent form signed by patients and/or impartial witness must have been approved by the Ethics Committee (IEC) for the current study.
• Patients must have the ability and willingness to comply with study procedures.

Exclusion Criteria

• Patients with atypical, early onset (first decade) or syndromic forms of RP (e.g. paravenous, pericentral sector or unilateral RP, Leber's congenital amaurosis, Refsum disease, Usher syndrome, Bardet-Biedl syndrome, etc).
• Patients with non-recordable 30 Hz cone ERG in either eye.
• Patients with Goldman visual field less than 20º using the V4e target or residual central visual field less than -35 dB as evaluated by the 24-2 program of the Humphrey visual field in either eye.
• Evidence of an active ocular infection in either eye.
• History of uveitis or evidence of intraocular inflammation in either eye.
• History or evidence of glaucoma or an intraocular pressure (IOP) greater than or equal 21 mmHg in either eye at the time of study enrollment.
• Patients with foveal thickness ≥ 250 micrometers (as evaluated with OCT).
• History of cystoid macular oedema or presence of cystoid macular oedema on OCT at the time of study enrolment.
• Anterior segment abnormalities or media opacities obscuring the view of the posterior pole in either eye.
• History of any ocular surgery (including laser or refractive surgical procedures) in either eye within the 120 days before study enrolment. Ocular surgery will not be allowed during the study treatment period and elective ocular surgery procedures should not be planned during the duration of the follow-up period.
• Treatment with corticosteroids (systemic, periocular or intravitreal) or any other non-approved, experimental, investigational or neuroprotectant therapy (systemic, topical, intravitreal) in either eye within 90 days of study enrollment.
• Use of any medication other than the study medication for the treatment of ocular diseases with the exception of artificial tears during the study period.

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Dompé Farmaceutici S.p.A

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Flavio Mantelli, MD, PhD

Role: STUDY_DIRECTOR

Dompé farmaceutici S.p.A., Milan

Locations

Azienda Ospedaliero Universitaria Careggi

Florence, , Italy

Azienda Ospedaliera San Paolo - U.O. Oculistica

Milan, , Italy

A.O. Seconda Università Degli Studi di Napoli - Nuovo Policlinico - UOC Oftalmologia

Naples, , Italy

Università Cattolica del Sacro Cuore - Policlinico Gemelli - Istituto di Oftalmologia

Rome, , Italy

IRCCS Fondazione G.B. Bietti per lo Studio e la Ricerca in Oftalmologia

Rome, , Italy

Countries

Italy

Other Identifiers

2013-003029-26

Identifier Type: EUDRACT_NUMBER

Identifier Source: secondary_id

NGF0113

Identifier Type: -

Identifier Source: org_study_id