Spinal subpial delivery of AAV9 enables widespread gene silencing and blocks motoneuron degeneration in ALS.

Journal: 
Nat Med
Publication Year: 
2019
Authors: 
Mariana Bravo-Hernandez
Takahiro Tadokoro
Michael R Navarro
Oleksandr Platoshyn
Yoshiomi Kobayashi
Silvia Marsala
Atsushi Miyanohara
Stefan Juhas
Jana Juhasova
Helena Skalnikova
Zoltan Tomori
Ivo Vanicky
Hana Studenovska
Vladimir Proks
PeiXi Chen
Noe Govea-Perez
Dara Ditsworth
Joseph D Ciacci
Shang Gao
Wenlian Zhu
Eric T Ahrens
Shawn P Driscoll
Thomas D Glenn
Melissa McAlonis-Downes
Sandrine Da Cruz
Samuel L Pfaff
Brian K Kaspar
Don W Cleveland
Martin Marsala
PubMed link: 
31873312
Public Summary: 
Gene silencing with virally delivered shRNA represents a promising approach for treatment of inherited neurodegenerative disorders. In the present study we develop a subpial technique, which we show in adult animals successfully delivers adeno-associated virus (AAV) throughout the cervical, thoracic and lumbar spinal cord, as well as brain motor centers. One-time injection at cervical and lumbar levels just before disease onset in mice expressing a familial amyotrophic lateral sclerosis (ALS)-causing mutant SOD1 produces long-term suppression of motoneuron disease, including near-complete preservation of spinal α-motoneurons and muscle innervation. Treatment after disease onset potently blocks progression of disease and further α-motoneuron degeneration. A single subpial AAV9 injection in adult pigs or non-human primates using a newly designed device produces homogeneous delivery throughout the cervical spinal cord white and gray matter and brain motor centers. Thus, spinal subpial delivery in adult animals is highly effective for AAV-mediated gene delivery throughout the spinal cord and supraspinal motor centers.
Scientific Abstract: 
Gene silencing with virally delivered shRNA represents a promising approach for treatment of inherited neurodegenerative disorders. In the present study we develop a subpial technique, which we show in adult animals successfully delivers adeno-associated virus (AAV) throughout the cervical, thoracic and lumbar spinal cord, as well as brain motor centers. One-time injection at cervical and lumbar levels just before disease onset in mice expressing a familial amyotrophic lateral sclerosis (ALS)-causing mutant SOD1 produces long-term suppression of motoneuron disease, including near-complete preservation of spinal alpha-motoneurons and muscle innervation. Treatment after disease onset potently blocks progression of disease and further alpha-motoneuron degeneration. A single subpial AAV9 injection in adult pigs or non-human primates using a newly designed device produces homogeneous delivery throughout the cervical spinal cord white and gray matter and brain motor centers. Thus, spinal subpial delivery in adult animals is highly effective for AAV-mediated gene delivery throughout the spinal cord and supraspinal motor centers.