Targeted PMP22 TATA-box editing by CRISPR/Cas9 reduces demyelinating neuropathy of Charcot-Marie-Tooth disease type 1A in mice.
Nucleic Acids Res
; 48(1): 130-140, 2020 01 10.
Article
in En
| MEDLINE
| ID: mdl-31713617
ABSTRACT
Charcot-Marie-Tooth 1A (CMT1A) is the most common inherited neuropathy without a known therapy, which is caused by a 1.4 Mb duplication on human chromosome 17, which includes the gene encoding the peripheral myelin protein of 22 kDa (PMP22). Overexpressed PMP22 protein from its gene duplication is thought to cause demyelination and subsequently axonal degeneration in the peripheral nervous system (PNS). Here, we targeted TATA-box of human PMP22 promoter to normalize overexpressed PMP22 level in C22 mice, a mouse model of CMT1A harboring multiple copies of human PMP22. Direct local intraneural delivery of CRISPR/Cas9 designed to target TATA-box of PMP22 before the onset of disease, downregulates gene expression of PMP22 and preserves both myelin and axons. Notably, the same approach was effective in partial rescue of demyelination even after the onset of disease. Collectively, our data present a proof-of-concept that CRISPR/Cas9-mediated targeting of TATA-box can be utilized to treat CMT1A.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Schwann Cells
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Charcot-Marie-Tooth Disease
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TATA Box
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Molecular Targeted Therapy
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Myelin Proteins
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Myelin Sheath
Limits:
Animals
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Humans
Language:
En
Journal:
Nucleic Acids Res
Year:
2020
Document type:
Article