What we do


Reverse Rett is a patient advocacy and research organisation working to deliver treatments and a cure for Rett Syndrome to everyone affected.

At Reverse Rett, we’re working to accelerate treatments and a cure for everyone affected by Rett syndrome. 

Over the last fourteen years, we’ve invested in high-quality research projects such as the RSRT Gene Therapy and MECP2 Consortia, which have led to the gene therapy programs in clinical trials today. 

As well as funding the research, we’ve been working aggressively for years to bring clinical trials of disease-modifying treatments to the UK. 

Clinical trials of gene therapy have just been approved by the UK regulatory authorities. We need your help to continue our work. Here is a timeline of our progress:

Key Milestones
February 2007

Sir Professor Adrian Bird shows Rett Syndrome can be reversed in mice, a huge moment that paves the way for Rett Syndrome gene therapy research in humans

July 2010

Reverse Rett is founded by five parents from the home of now CEO, Rachael Stevenson

July 2011

Reverse Rett support the launch of RSRT’s international MECP2 Consortium (Bird, Greenberg and Mandel Labs) to combine global efforts to find a tangible way to reverse Rett Syndrome in humans, total Reverse Rett contribution $1.65 Million (2011-2017)

January 2013

Reverse Rett support RSRT launch of Gene Therapy Consortium (Cobb and Gray Labs) to compound efforts to drive Gene Therapy for Rett Syndrome into human trials. Total Reverse Rett contribution $717,133 (2014-2019)

August 2013

Gene therapy shown to reverse the symptoms of Rett Syndrome in mice at the lab of MECP2 Consortium member, Gail Mandel. Total Reverse Rett contribution to Mandel Lab $146,666 (2012-2014)

September 2013

Reverse Rett start Rett Registry UK in anticipation of human clinical trials of potential treatments

September 2014

Reverse Rett begin seed-funding Rett-focused clinical team at King’s College London under Professor Santosh to develop a UK centre with capacity to run the first UK Rett trial

March 2017

UK’s first Rett syndrome clinical trial starts at King’s College Hospital under Professor Santosh with Clinical Trial Co-ordinator funding and logistical support from Reverse Rett

June 2019

2nd UK clinical trial for a potential treatment for Rett Syndrome launched at Alder Hey Children’s Hospital. Reverse Rett contracted to recruit, pre-screen, refer and provide logistical support for patients and families

September 2019

Reverse Rett launches Rett Syndrome clinical treatment and research centre, the CIPP Rett Centre at King’s College Hospital. Total Reverse Rett funding to date £1.2 Million (2019-2023).

March 2020

3rd UK clinical trial for Rett Syndrome is launched at trial sites in Manchester and London with Reverse Rett providing Clinical Trial Support Services building further capacity to run trials of more complex disease-modifying treatments here in the UK

May 2022

Neurogene announce Rett gene therapy program, NGN-401. This product is based on the work of Cobb Lab. Total Reverse Rett contribution to Cobb Lab to date is $1.478 Million


June 2022

4th UK clinical trial (Anavex 2-73 paediatric) starts at five trial sites: CIPP Rett Centre, Evelina Children’s Hospital, Manchester Rare Conditions Centre, Nottingham Children’s Hospital, Royal Hospital for Children, Edinburgh. Reverse Rett contracted to provide Clinical Trial Support Services to all sites further building capacity to run trials of more complex disease-modifying treatments here in the UK

August 2022

Taysha Gene Therapies files IND/CTA with Health Canada and receives green light for the first in human gene therapy trial for Rett to start imminently.

January 2023

Neurogene receives FDA approval for clinical trial in Rett gene therapy, NGN-401 in the USA


June 2023

Taysha Gene Therapies announce that the first adult patient has been dosed with their gene therapy product, TSHA-102.

01 August 2023

Taysha Gene Therapies cleared for second patient to be dosed with TSHA-102

14 August 2023

1st adult patient showing significant improvement on TSHA-102

Taysha expand eligibility for Canada trial to adolescent patients

Patients age 12 and older are now eligible for the phase 1/2 clinical trial in Canada

Neurogene doses first patients in US clinical trial of NGN-401

Neurogene announces that the product has been well-tolerated to date with no treatment-emergent or procedure-related serious adverse events

Neurogene announces clearance to dose 3rd US patient and MHRA clearance for UK clinical trial

DSMB clears 3rd pediatric patient for dosing in early 1Q:24. Clearance obtained from UK MHRA for NGN-401 clinical trials to start.

Taysha announces dosing of first US paediatric patient and MHRA clearance for UK trial

The first US child has been dosed with TSHA-102. The product has been well-tolerated to date with no treatment-emergent or procedure-related serious adverse events. Clearance obtained from UK MHRA for NGN-401 clinical trials to start.

What are we currently funding?

We’re working to bring about better days for children and adults with Rett Syndrome by funding laboratory and clinical research projects that will lead to better outcomes for everyone affected, both now and in the future


How we fund that research

The UK clinical research we fund is subject to a rigorous peer review process, validated by our membership of the Association of Medical Research Charities.

International Rett Syndrome research is funded through our partnership with the US based Rett Syndrome Research Trust who provide peer review and monitoring for those projects.

Our policies and documents

Reverse Rett is a full member of the Association of Medical Research Charities (AMRC), a network of 150 medical and health research charities who deliver high-quality research that saves and improves lives. Membership of AMRC has to be earned through adherence to stringent peer review criteria.

With people with Rett Syndrome at the heart of everything we do, we’re proud to hold ourselves to the highest standard in all areas of our operations.

I was first introduced to Rett Syndrome when I received an out of the blue phone call from Adrian Bird, who first discovered MeCP2 protein, requesting some help with a set of specific experiments. Following this successful collaboration, Rett Syndrome research has become a primary focus of my lab. While traditional drug approaches will likely be restricted to correcting specific aspects of what goes wrong in Rett Syndrome, it is conceivable that Gene Therapy can correct the cause of Rett Syndrome at it’s very source and thus provide a profound recovery of function.

Dr Stuart Cobb, Simons Fellow and Reader in Neuroscience, University of Edinburgh

Latest news

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