Not exact matches
«There may be factors that
lead to preferential localization of the
dystrophin production.
A particular type of stem cell found in muscle can give rise to new muscle tissue, so a team
led by geneticist Luis Garcia of Généthon, a nonprofit biotechnology firm in Évry, France, investigated whether these cells could be used to reverse the
dystrophin problems.
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.
Muscle inactivation of mTOR causes metabolic defects and
dystrophin downregulation
leading to a severe myopathy
The team
led by biomedical engineering professor Charles A. Gersbach used a mouse model suffering from a mutated exon of the
dystrophin gene, programming CRISPR / CAS9 — a bacterial - protein derived process of cutting and pasting DNA portions — to snip out the defective exon.
In the absence of
dystrophin, the polarity effector Par1b is dysregulated,
leading to the failure of Par3 to become localized to the cortex associated with the basal lamina.
This discovery
led to the identification of the
dystrophin protein, a key member of a membrane complex of proteins.
Dr. Davies» work also
led to the characterization of the protein utrophin, a relative of
dystrophin.
Within the mutational hotspot for
dystrophin, exons 45 - 55, there are multiple common deletions that maintain the protein's reading frame,
leading to the production of a smaller, but at least partially functional protein.