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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Front+Mol+Neurosci
2016 ; 9
(ä): 70
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English Wikipedia
The Development of a Viral Mediated CRISPR/Cas9 System with Doxycycline Dependent
gRNA Expression for Inducible In vitro and In vivo Genome Editing
#MMPMID27587996
de Solis CA
; Ho A
; Holehonnur R
; Ploski JE
Front Mol Neurosci
2016[]; 9
(ä): 70
PMID27587996
show ga
The RNA-guided Cas9 nuclease, from the type II prokaryotic Clustered Regularly
Interspersed Short Palindromic Repeats (CRISPR) adaptive immune system, has been
adapted and utilized by scientists to edit the genomes of eukaryotic cells. Here,
we report the development of a viral mediated CRISPR/Cas9 system that can be
rendered inducible utilizing doxycycline (Dox) and can be delivered to cells in
vitro and in vivo utilizing adeno-associated virus (AAV). Specifically, we
developed an inducible gRNA (gRNAi) AAV vector that is designed to express the
gRNA from a H1/TO promoter. This AAV vector is also designed to express the Tet
repressor (TetR) to regulate the expression of the gRNAi in a Dox dependent
manner. We show that H1/TO promoters of varying length and a U6/TO promoter can
edit DNA with similar efficiency in vitro, in a Dox dependent manner. We also
demonstrate that our inducible gRNAi vector can be used to edit the genomes of
neurons in vivo within the mouse brain in a Dox dependent manner. Genome editing
can be induced in vivo with this system by supplying animals Dox containing food
for as little as 1 day. This system might be cross compatible with many existing
S. pyogenes Cas9 systems (i.e., Cas9 mouse, CRISPRi, etc.), and therefore it
likely can be used to render these systems inducible as well.