Unknown

Dataset Information

0

Detyrosinated microtubules modulate mechanotransduction in heart and skeletal muscle.


ABSTRACT: In striated muscle, X-ROS is the mechanotransduction pathway by which mechanical stress transduced by the microtubule network elicits reactive oxygen species. X-ROS tunes Ca(2+) signalling in healthy muscle, but in diseases such as Duchenne muscular dystrophy (DMD), microtubule alterations drive elevated X-ROS, disrupting Ca(2+) homeostasis and impairing function. Here we show that detyrosination, a post-translational modification of α-tubulin, influences X-ROS signalling, contraction speed and cytoskeletal mechanics. In the mdx mouse model of DMD, the pharmacological reduction of detyrosination in vitro ablates aberrant X-ROS and Ca(2+) signalling, and in vivo it protects against hallmarks of DMD, including workload-induced arrhythmias and contraction-induced injury in skeletal muscle. We conclude that detyrosinated microtubules increase cytoskeletal stiffness and mechanotransduction in striated muscle and that targeting this post-translational modification may have broad therapeutic potential in muscular dystrophies.

SUBMITTER: Kerr JP 

PROVIDER: S-EPMC4633818 | biostudies-literature | 2015 Oct

REPOSITORIES: biostudies-literature

altmetric image

Publications


In striated muscle, X-ROS is the mechanotransduction pathway by which mechanical stress transduced by the microtubule network elicits reactive oxygen species. X-ROS tunes Ca(2+) signalling in healthy muscle, but in diseases such as Duchenne muscular dystrophy (DMD), microtubule alterations drive elevated X-ROS, disrupting Ca(2+) homeostasis and impairing function. Here we show that detyrosination, a post-translational modification of α-tubulin, influences X-ROS signalling, contraction speed and  ...[more]

Similar Datasets

| S-EPMC6195768 | biostudies-literature
| S-EPMC5441927 | biostudies-literature
| S-EPMC6363446 | biostudies-literature
| S-EPMC5884485 | biostudies-literature
| S-EPMC10106437 | biostudies-literature
| S-EPMC3444772 | biostudies-literature
| S-EPMC6759837 | biostudies-literature
| S-EPMC3674804 | biostudies-literature
| S-EPMC4446796 | biostudies-literature
| S-EPMC10770614 | biostudies-literature