共 47 条
Restoration of SMN function:: Delivery of a trans-splicing RNA re-directs SMN2 pre-mRNA splicing
被引:68
作者:

Coady, Tristan H.
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机构: Univ Missouri, Bond Life Sci Ctr, Dept Vet Pathobiol, Columbia, MO 65211 USA

Shababi, Monir
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h-index: 0
机构: Univ Missouri, Bond Life Sci Ctr, Dept Vet Pathobiol, Columbia, MO 65211 USA

Tullis, Gregory E.
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h-index: 0
机构: Univ Missouri, Bond Life Sci Ctr, Dept Vet Pathobiol, Columbia, MO 65211 USA

Lorson, Christian L.
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h-index: 0
机构: Univ Missouri, Bond Life Sci Ctr, Dept Vet Pathobiol, Columbia, MO 65211 USA
机构:
[1] Univ Missouri, Bond Life Sci Ctr, Dept Vet Pathobiol, Columbia, MO 65211 USA
[2] Boston Univ, Sch Med, Dept Ophthalmol, Boston, MA 02118 USA
关键词:
D O I:
10.1038/sj.mt.6300222
中图分类号:
Q81 [生物工程学(生物技术)];
Q93 [微生物学];
学科分类号:
071005 ;
0836 ;
090102 ;
100705 ;
摘要:
Spinal muscular atrophy (SMA) is caused by loss of survival motor neuron-1 (SMN1). A nearly identical copy gene called SMN2 is present in all SMA patients; however SMN2 produces low levels of functional protein due to alternative splicing. Recently a therapeutic approach has been developed referred to as trans-splicing. Conceptually, this strategy relies upon pre-messenger RNA (pre-mRNA) splicing occurring between two separate molecules: (i) the endogenous target RNA and (ii) the therapeutic RNA that provides the correct RNA sequence via a trans-splicing event. SMN trans-splicing RNAs were initially examined and expressed from a plasmid-backbone and shown to re-direct splicing from a SMN2 mini-gene as well as from endogenous transcripts. Subsequently, recombinant adeno-associated viral vectors were developed that expressed and delivered trans-splicing RNAs to SMA patient fibroblasts. In the severe SMA patient fibroblasts, SMN2 splicing was redirected via trans-splicing to produce increased levels of full-length SMN mRNA and total SMN protein levels. Finally, small nuclear ribonucleoprotein (snRNP) assembly, a critical function of SMN, was restored to SMN-deficient SMA fibroblasts following treatment with the trans-splicing vector. Together these results demonstrate that the alternatively spliced SMN2 exon 7 is a tractable target for replacement by trans-splicing.
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页码:1471 / 1478
页数:8
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