EU/3/20/2248 - orphan designation for treatment of Fabry disease
Adeno-associated viral vector serotype S3 encoding human alpha-galactosidase A cDNA
OrphanHuman
Overview
On 28 February 2020, orphan designation EU/3/20/2248 was granted by the European Commission to Freeline Therapeutics (Ireland) Limited, Ireland, for adeno-associated viral vector serotype S3 encoding human alpha-galactosidase A cDNA (also known as FLT190) for the treatment of Fabry disease.
Fabry disease is an inherited disease that is caused by the lack of an enzyme called alpha galactosidase A, which breaks down and removes Gb3, a complex molecule containing sugars and fats.
In patients with this condition, large amounts of Gb3 build up in tissues of vital organs, such as the kidneys and heart, leading to kidney failure and heart problems. Gb3 also builds up in the tissues of the skin, eye and nervous system leading to skin damage, clouding of the front part of the eye, pain in the hands and feet and complications affecting the brain.
Fabry disease is a long-term debilitating disease due to recurrent episodes of severe pain not responding to painkillers. It is also life-threatening due to kidney problems, heart attack and stroke.
At the time of designation, Fabry disease affected approximately 2.6 in 10,000 people in the European Union (EU). This was equivalent to a total of around 135,000 people*, and is below the ceiling for orphan designation, which is 5 people in 10,000. This is based on the information provided by the sponsor and the 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 28), Norway, Iceland and Liechtenstein. This represents a population of 519,200,000 (Eurostat 2020).
At the time of designation, Fabrazyme (agalsidase beta), Galafold (migalastat) and Replagal (agalsidase alfa) were authorised in the EU to treat Fabry disease.
The sponsor has provided sufficient information to show that the medicine might be of significant benefit for patients with Fabry disease. Laboratory studies indicate that a single dose of the medicine could increase activity of alpha-galactosidase A for a long time and thereby reduce the need for regular treatment. This assumption will need to be confirmed at the time of marketing authorisation, in order to maintain the orphan status.
This medicine is made up of a virus that contains the gene for alpha-galactosidase A, the enzyme the patient lacks. When given by injection, it is expected that the virus will carry the gene into the patient's liver cells, allowing the patient to start producing the missing enzyme and thereby relieve symptoms of the disease.
The virus used in this medicine (adeno-associated virus) does not cause disease in humans.
The effects of adeno-associated viral vector serotype S3 encoding human alpha-galactosidase A cDNA have been evaluated in experimental models.
At the time of submission of the application for orphan designation, clinical trials with this medicine in patients with Fabry disease were ongoing.
At the time of submission, the medicine was not authorised anywhere in the EU for the treatment of Fabry disease or designated as an orphan medicinal product elsewhere for this condition.
In accordance with Regulation (EC) No 141/2000, the COMP adopted a positive opinion on 22 January 2020, recommending the granting of this designation.
- 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 EU) 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
- Active substance
- Adeno-associated viral vector serotype S3 encoding human alpha-galactosidase A cDNA
- Intended use
- Treatment of Fabry disease
- Orphan designation status
- Positive
- EU designation number
- EU/3/20/2248
- Date of designation
- Sponsor
Spur Therapeutics (Ireland) Limited
Update history
| Date | Update |
|---|---|
| October 2024 | The sponsor's name changed to Spur Therapeutics (Ireland) Limited. |
EMA list of opinions on orphan medicinal product designation
EMA publishes information on orphan medicinal product designation adopted by the Committee for Orphan Medicinal Products (COMP) on the IRIS online platform:
Patients' organisations
For contact details of patients’ organisations whose activities are targeted at rare diseases, see:
European Organisation for Rare Diseases (EURORDIS), a non-governmental alliance of patient organisations and individuals active in the field of rare diseases.
Orphanet, a database containing information on rare diseases, which includes a directory of patients’ organisations registered in Europe.
EU register of orphan medicines
The list of medicines that have received an orphan designation in the EU is available on the European Commission's website: