Abstract:
:Giant axonal neuropathy (GAN) is a progressive neurodegenerative disease caused by autosomal recessive mutations in the GAN gene resulting in a loss of a ubiquitously expressed protein, gigaxonin. Gene replacement therapy is a promising strategy for treatment of the disease; however, the effectiveness and safety of gigaxonin reintroduction have not been tested in human GAN nerve cells. Here we report the derivation of induced pluripotent stem cells (iPSCs) from three GAN patients with different GAN mutations. Motor neurons differentiated from GAN iPSCs exhibit accumulation of neurofilament (NF-L) and peripherin (PRPH) protein and formation of PRPH aggregates, the key pathological phenotypes observed in patients. Introduction of gigaxonin either using a lentiviral vector or as a stable transgene resulted in normalization of NEFL and PRPH levels in GAN neurons and disappearance of PRPH aggregates. Importantly, overexpression of gigaxonin had no adverse effect on survival of GAN neurons, supporting the feasibility of gene replacement therapy. Our findings demonstrate that GAN iPSCs provide a novel model for studying human GAN neuropathologies and for the development and testing of new therapies in relevant cell types.
journal_name
Hum Mol Genetjournal_title
Human molecular geneticsauthors
Johnson-Kerner BL,Ahmad FS,Diaz AG,Greene JP,Gray SJ,Samulski RJ,Chung WK,Van Coster R,Maertens P,Noggle SA,Henderson CE,Wichterle Hdoi
10.1093/hmg/ddu556subject
Has Abstractpub_date
2015-03-01 00:00:00pages
1420-31issue
5eissn
0964-6906issn
1460-2083pii
ddu556journal_volume
24pub_type
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