E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
CNGA3-linked achromatopsia |
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E.1.1.1 | Medical condition in easily understood language |
Degenerative disease of the retina |
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E.1.1.2 | Therapeutic area | Diseases [C] - Eye Diseases [C11] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 20.0 |
E.1.2 | Level | LLT |
E.1.2 | Classification code | 10000454 |
E.1.2 | Term | Achromatopsia |
E.1.2 | System Organ Class | 10010331 - Congenital, familial and genetic disorders |
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E.1.3 | Condition being studied is a rare disease | No |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
Main objective: The primary aim of the trial is the investigation of the safety of rAAV.hCNGA3 after bilateral subretinal injection in adult and minor patients with CNGA3-linked achromatopsia.
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E.2.2 | Secondary objectives of the trial |
The investigation of treatment effects as reflected by patient/parent reported outcomes and the efficacy of the intervention on visual functions are secondary aims of the trial. |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
• clinical diagnosis of achromatopsia • 6-12 years of age • ≥ 18 years of age • bi-allelic pathogenic or likely pathogenic mutations in CNGA3 • BCVA ≥ 20/400 • a minimal outer nuclear layer thickness of 10µm at 3° eccentricity (normal = 38±6µm) • ability to understand and willingness to consent to study protocol • no infection with Human Immundeficiency Virus (HIV) • Male patients must agree to use condoms during the first 6 months post treatment. • Female patients of childbearing potential must agree to use an effective method of birth control during the first 6 months post treatment. • negative pregnancy test in women with childbearing potential (a woman who is two years post-menopausal or surgically sterile is not considered to be of childbearing potential)
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E.4 | Principal exclusion criteria |
• any other retinopathy due to other diseases e.g. (but not limited to) arterial hypertension, trauma or acquired inflammatory diseases (uveitis serology) , retinopathy of the premature • systemic conditions (e.g. coronary heart disease, congenital/genetic conditions, autoimmune disorders) which may affect study participation or outcome measures • current or recent participation in other study or administration of biologic agent within the last three months • recent (within the last 6 months) ocular surgery, intravitreal or subretinal implantation of a medical device • known sensitivity to any compound used in the study • contraindications to systemic immunosuppression • subject/partner of childbearing potential unwilling to use adequate contraception for six months after dosing • nursing or pregnant female subject • any other cause that, in the investigator‘s opinion, renders potential subjects not suitable for the study • causal mutations in other genes for hereditary retinal diseases • contraindications in view of the planned surgery (e.g. anaemia Hb<8g/dl, severe coagulopathy, severe blood pressure fluctuations) including intolerance and contraindications to general anaesthesia • ocular opacity and mature cataract • ocular infection with herpes simplex virus in medical history • history of ocular malignancies • disorders of the inner retina (e.g. retinal vascular occlusions in the patients history) • glaucoma defined as damage of the optic nerve • history of poorly controlled (HbA1c > 7%) Diabetes Mellitus type 1 or type 2 • patients treated with systemic corticoids within 14 days prior inclusion • systemic illness or medically significant abnormal laboratory values >3 UNL in blood analysis including renal and hepatic functions at inclusion • absence of vision on the contralateral eye • contraindication to pharmacological mydriasis (e.g. history of angle block glaucoma)
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E.5 End points |
E.5.1 | Primary end point(s) |
E.5.1 Primary End Point (repeat as necessary) : Primary Endpoint safety: • Incidence and severity of ocular adverse events • Incidence and severity of non-ocular adverse events
Safety will be assessed by clinical examination of ocular inflammation (slit lamp, fundus biomicroscopy), fundus photography, fundus autofluorescence and by evaluation of rod function in the treated area (DAC and scotopic CPC). Systemic safety will be assessed by vital signs, routine clinical chemistry testing (including CRP, ESR) and full/differential blood counts. Immunopathology essays will include specific enzyme-linked immunosorbent assays for humoral antibodies against rAAV8 capsid protein.
Adverse events of special interest (AESI) - Adverse immunological reaction both systemic and ocular, defined by e.g. - but not limited to - blood parameters, findings in slit lamp examination. - Severe vision loss, defined by more than 15 ETDRS letters loss compared to screening more than 56 days after surgery.
SAEs and AESIs must be reported to the sponsor within 24h, the sponsor is obliged to inform the DMC immediately. The procedure is defined on the SAE worksheet.
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
Primary endpoint safety: Safety assessment 12 months after treatment (incidence and severity of ocular and non-ocular adverse events) Primary endpoint efficacy: Contrast sensitivity (Pelli Robson 3 m) 6 months after treatment
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E.5.2 | Secondary end point(s) |
Secondary endpoints efficacy: • Contrast sensitivity (Pelli Robson 3 m) • BCVA assessed using the ETDRS visual acuity protocol • FrACT (Freiburg Visual Acuity & Contrast Test) • Roth FM28 sat • VA-CAL (Visual acuity under different conditions of contrast and ambient light) • Patient reported outcomes (VFQ25/CVFQ, A3-PRO) • Electroretinography • Chromatic pupil campimetry (CPC) cone protocol – exploratory - functional
Secondary endpoints safety: • Changes in various outcome measures, as determined by • Spectral domain optical coherence tomography (SD-OCT) morphological • Chromatic pupil campimetry (CPC) rod protocol – exploratory - functional • Dark-adapted chromatic perimetry (DAC) – exploratory - functional
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
Timepoint(s) of evaluation of this endpoint: 12 months after treatment |
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E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | No |
E.6.3 | Therapy | Yes |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | No |
E.6.7 | Pharmacodynamic | No |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | No |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | Yes |
E.7.1.1 | First administration to humans | Yes |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | Yes |
E.7.1.3.1 | Other trial type description |
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E.7.2 | Therapeutic exploratory (Phase II) | Yes |
E.7.3 | Therapeutic confirmatory (Phase III) | No |
E.7.4 | Therapeutic use (Phase IV) | No |
E.8 Design of the trial |
E.8.1 | Controlled | Yes |
E.8.1.1 | Randomised | Yes |
E.8.1.2 | Open | No |
E.8.1.3 | Single blind | Yes |
E.8.1.4 | Double blind | No |
E.8.1.5 | Parallel group | No |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | No |
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | No |
E.8.2.2 | Placebo | No |
E.8.2.3 | Other | Yes |
E.8.2.3.1 | Comparator description |
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E.8.2.4 | Number of treatment arms in the trial | 2 |
E.8.3 |
The trial involves single site in the Member State concerned
| Yes |
E.8.4 | The trial involves multiple sites in the Member State concerned | No |
E.8.5 | The trial involves multiple Member States | No |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | No |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
E.8.7 | Trial has a data monitoring committee | Yes |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 13 |
E.8.9.1 | In the Member State concerned months | 1 |
E.8.9.1 | In the Member State concerned days | 0 |