EU/3/09/720

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Orphan designation

On 2 February 2010, orphan designation (EU/3/09/720) was granted by the European Commission to Oxford BioMedica (UK) Ltd, United Kingdom, for lentiviral vector containing the human ABCA4 gene for the treatment of Stargardt’s disease.

What is Stargardt’s disease?

Stargardt’s disease is a genetic disorder of the eye that leads to the gradual loss of sight. It is caused by abnormalities in a gene called ABCA4. The ABCA4 gene is responsible for the production of a protein called ABCR, which controls the movement of substances into and out of cells in the retina (the light-sensitive surface at the back of the eye). In patients with Stargardt’s disease, ABCR does not work properly. This causes deposits to build up inside the retina cells, which become damaged and eventually die.

Stargardt’s disease is a long-term debilitating disease because it leads to the patient’s sight getting worse and eventually to blindness.

What is the estimated number of patients affected by the condition?

At the time of designation, Stargardt’s disease affected approximately 1 in 10,000 people in the European Union (EU)*. This is equivalent to a total of around 50,000 people, and is below the threshold for orphan designation, which is 5 people in 10,000. This is based on the information provided by the sponsor and knowledge of the Committee for Orphan Medicinal Products (COMP).

*Disclaimer: For the purpose of the designation, the number of patients affected by the condition is estimated and assessed on the basis of data from the European Union (EU 27), Norway, Iceland and Liechtenstein. This represents a population of 504,800,000 (Eurostat 2009).

What treatments are available?

At the time of submission of the application for orphan designation, no satisfactory methods were authorised in the EU for the treatment of Stargardt’s disease. Patients with the disease were usually given physical aids such as sunglasses to reduce the rate of damage to the retina, or spectacles, magnifiers or telescopes to help them see during the early stages of the disease. Laser treatment can help to stabilise the loss of vision in some patients. Patients also often have genetic counselling (discussion of the risks of passing the condition on to children).

How is this medicine expected to work?

Lentiviral vector containing the human ABCA4 gene is an advanced therapy medicine that belongs to the group called ‘gene therapy products’. These are medicines that work by delivering genes into the body. The medicine is made up of a virus that contains the human ABCA4 gene. The virus is used to carry the ABCA4 gene into the cells of the retina. These cells can then start to produce normal ABCR protein to replace the defective protein. When it is injected into the eye, the medicine is expected to relieve the symptoms of the disease and prevent the loss of sight. The type of virus used in this medicine (lentivirus) is modified so that it does not cause disease in humans.

What is the stage of development of this medicine?

At the time of submission of the application for orphan designation, the evaluation of the effects of lentiviral vector containing the human ABCA4 gene in experimental models was ongoing.

At the time of submission, no clinical trials with the designated product in patients with Stargardt’s disease had been started.

At the time of submission, lentiviral vector containing the human ABCA4 gene was not authorised anywhere in the EU for Stargardt’s disease or designated as an orphan medicinal product elsewhere for this condition.

In accordance with Regulation (EC) No 141/2000 of 16 December 1999, the COMP adopted a positive opinion on 3 December 2009 recommending the granting of this designation.

Opinions on orphan medicinal product designations are based on the following three criteria:
  • the seriousness of the condition;
  • the existence of alternative methods of diagnosis, prevention or treatment;
  • either the rarity of the condition (affecting not more than 5 in 10,000 people in the European Union) or insufficient returns on investment.

Designated orphan medicinal products are products that are still under investigation and are considered for orphan designation on the basis of potential activity. An orphan designation is not a marketing authorisation. As a consequence, demonstration of quality, safety and efficacy is necessary before a product can be granted a marketing authorisation.

Key facts

Product details for <p>Lentiviral vector containing the human ABCA4 gene</p>
Active substanceLentiviral vector containing the human ABCA4 gene
Medicine Name
Disease/conditionTreatment of Stargardt’s disease
Date of decision02/02/2010
OutcomePositive
Orphan decision numberEU/3/09/720

Review of designation

Sponsor’s contact details:

Oxford BioMedica (UK) Ltd
The Medawar Centre
Robert Robinson Avenue
The Oxford Science Park
Oxford OX4 4GA
United Kingdom
Telephone: + 44 1865 783 000
Telefax: + 44 1865 783 001
E-mail: enquiries@oxfordbiomedica.co.uk

Patient associations’ contact points:

Pro Retina Deutschland e.V.
Vaalser Straße 108
52074 Aachen
Germany
Telephone: +49 241 87 00 18
Telefax: +49 241 87 39 61
E-mail: Pro-Retina@t-online.de

SOS Rétinite - Association Nationale de Lutte contre la Cécité- Reconnue d'utilité publique
276 Impasse de la Baume
34000 Montpellier
France
Telephone: +33 4 67 65 06 28
Telefax: +33 4 67 22 43 47

Retina International
Ausstellungstrasse 36
8005 Zürich
Switzerland
Telephone: +41 44 444 10 77
Telefax: +41 44 444 10 70