Childhood Ataxia Telangiectasia Neuroimaging Assessment Project – The Catnap Study

Research Project Information

Principal researchers: Dr Rob Dineen and Professor Dorothee Auer
Institute: 
University of Nottingham, UK
Project Completion Date: 
August 2016

Project Overview

This research project jointly funded with the A-T Children’s Project aimed to understand what happens in the brains of children who have A-T. The Nottingham based team used the latest techniques in MRI scanning to look at the brains of children with A-T with a view to developing biological markers which would measure the underlying disease process and assess whether future new treatments work. Nottingham University were uniquely placed to carry out this research as the UK National A-T Children’s clinic is located  in the city. Due to their proximity to the clinic, the research team were able to recruit more A-T children than would be practically possible in other larger countries, leading to the biggest study of its kind in the world.

Research Methods

Following an initial phase of protocol development (particularly for the measurement of glutathione) the team underwent a data acquisition phase where they recruited, assessed and performed MRI scanning of children with A-T, and a group of matched healthy controls. 50 children aged 6 to 18 years were successfully recruited (26 A-T and 24 without A-T), of which 48 underwent the MRI scan.

Structural imaging was completed in all of the children as well as performing other research sequences. These included magnetic resonance spectroscopy, diffusion tensor imaging, neuromelanin-sensitive MRI, ASL perfusion MRI and resting state functional MRI.  Some data from these sequences had to be rejected due to participant motion, but analysis so far indicates that sufficient data exists to allow novel observations to be made regarding structural and functional imaging measure in paediatric A-T.

Project Outcome

The initial findings from the CATNAP study have shown that:

  1. Detailed brain MRI is feasible in paediatric A-T, including the measurement of the antioxidant glutathione, which is an important and naturally occurring brain chemical that helps to protect the brain
  2. It is possible to carry out detailed measurement of the volume of different brain structures that are important in A-T, and that some of these measurements reflect the levels of neurological disability that children and young people with A-T experience.

Publications

Preliminary results from the study have been presented at the 2016 A-T Clinical Research Conference, Warsaw.  Presentations on study design and recruitment updates were also given at the 2015 British Paediatric Neurology Association Meeting, Newcastle and at the 2015 Ataxia-Telangiectasia Workshop, Beijing.

A methods paper regarding the spectroscopy technique has been submitted and is now undergoing revision following reviewer comments and the main manuscript presenting the volumetric, spectroscopic, diffusion and perfusion analyses from the CATNAP study is under preparation.

What next?

The team are now analysing the data in a number of ways to find out which measures are most useful for providing information about the changes that occur in A-T, and which may be useful for use in future clinical trials aimed at treating the condition. Following this analysis and subsequent publication, the team plan to continue their studies in an effort to build in their initial findings.