Potential therapy for restoring breathing capacity in Duchenne muscular dystrophy by activating the brain

27 September 2017. New research published in The Journal of Physiology today suggests that enhancing breathing via the brain may limit deficiencies in respiratory capacity in Duchenne muscular dystrophy (DMD) patients.

Duchenne muscular dystrophy (DMD) is a fatal genetic neuromuscular disease, which can lead to respiratory failure. Respiratory muscle dysfunction is recognized in DMD, however a thorough assessment of nervous system control of respiratory muscles is lacking. 

Lead investigators David Burns and Ken O’Halloran at University College Cork, in conjunction with collaborator labs at the University of Calgary and Trinity College Dublin, performed experiments in mice lacking dystrophin, the muscle protein that malfunctions in DMD. These mice have been shown to be a useful pre-clinical model of DMD as they demonstrate many of the hallmark features of respiratory muscle dysfunction in DMD patients. 

In the young dystrophin-deficient mice, the respiratory control system was impaired on multiple levels. Importantly, the researchers found that the brain was compensating for this by increasing activation of the diaphragm muscle.

This study only offers a snapshot of the deficits and compensations at one time point in the progression of the disease. It is essential the findings from the study in the dystrophin-deficient mice are confirmed in human DMD patients before its potential applications in these patients can be considered.

David Burns, one of the lead investigators on the study, said:

‘Further study of physiological neuromuscular mechanisms that compensate for the absence of dystrophin is needed. A better understanding may provide insight with potential applications to a range of neuromuscular diseases, beyond DMD.’

ENDS

Notes for Editors

1. Full paper title: Sensorimotor control of breathing in the mdx mouse model of Duchenne Muscular Dystrophy http://onlinelibrary.wiley.com/doi/10.1113/JP274792/full

2. The Journal of Physiology publishes advances in physiology which increase our understanding of how our bodies function in health and disease. http://jp.physoc.org 

3. The Physiological Society brings together over 3,500 scientists from over 60 countries. The Society promotes physiology with the public and parliament alike. It supports physiologists by organising world-class conferences and offering grants for research and also publishes the latest developments in the field in its three leading scientific journals, The Journal of Physiology, Experimental Physiology and Physiological Reports. www.physoc.org 

Contacts:

The Physiological Society: 
Julia Turan, Communications Manager
pressoffice@physoc.org 
+44 (0)20 7269 5727 

Corresponding author:
Ken D. O’Halloran
k.ohalloran@ucc.ie