PMID- 16595609 OWN - NLM STAT- MEDLINE DCOM- 20061003 LR - 20121115 IS - 0964-6906 (Print) IS - 0964-6906 (Linking) VI - 15 IP - 10 DP - 2006 May 15 TI - A highly functional mini-dystrophin/GFP fusion gene for cell and gene therapy studies of Duchenne muscular dystrophy. PG - 1610-22 AB - A promising approach for treating Duchenne muscular dystrophy (DMD) is by autologous cell transplantation of myogenic stem cells transduced with a therapeutic expression cassette. Development of this method has been hampered by a low frequency of cellular engraftment, the difficulty of tracing transplanted cells, the rapid loss of autologous cells carrying marker genes that are unable to halt muscle necrosis and the difficulty of stable transfer of a large dystrophin gene into myogenic stem cells. We engineered a 5.7 kb miniDys-GFP fusion gene by replacing the dystrophin C-terminal domain (DeltaCT) with an eGFP coding sequence and removing much of the dystrophin central rod domain (DeltaH2-R19). In a transgenic mdx(4Cv) mouse expressing the miniDys-GFP fusion protein under the control of a skeletal muscle-specific promoter, the green fusion protein localized on the sarcolemma, where it assembled the dystrophin-glycoprotein complex and completely prevented the development of dystrophy in transgenic mdx(4Cv) muscles. When myogenic and other stem cells from these mice were transplanted into mdx(4Cv) recipients, donor cells can be readily identified in skeletal muscle by direct green fluorescence or by using antibodies against GFP or dystrophin. In mdx(4Cv) mice reconstituted with bone marrow cells from the transgenic mice, we monitored engraftment in various muscle groups and found the number of miniDys-GFP(+) fibers increased with time. We suggest that these transgenic mdx(4Cv) mice are highly useful for developing autologous cell therapies for DMD. FAU - Li, Sheng AU - Li S AD - Department of Neurology, University of Washington School of Medicine, Seattle, 98195-7720, USA. FAU - Kimura, En AU - Kimura E FAU - Ng, Rainer AU - Ng R FAU - Fall, Brent M AU - Fall BM FAU - Meuse, Leonard AU - Meuse L FAU - Reyes, Morayma AU - Reyes M FAU - Faulkner, John A AU - Faulkner JA FAU - Chamberlain, Jeffrey S AU - Chamberlain JS LA - eng GR - P01 AG015434/AG/NIA NIH HHS/United States GR - P01 AS046788/AS/ASC OASH HHS/United States GR - P01 NS46788/NS/NINDS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20060404 PL - England TA - Hum Mol Genet JT - Human molecular genetics JID - 9208958 RN - 0 (Dystrophin) RN - 0 (Recombinant Fusion Proteins) RN - 0 (enhanced green fluorescent protein) RN - 147336-22-9 (Green Fluorescent Proteins) SB - IM MH - Animals MH - Dystrophin/biosynthesis/*genetics MH - *Genetic Therapy MH - Green Fluorescent Proteins/*genetics MH - Mice MH - Mice, Transgenic MH - Muscle Contraction MH - Muscle Fibers, Skeletal/metabolism/pathology MH - Muscle, Skeletal/metabolism/pathology/physiopathology MH - Muscular Dystrophy, Duchenne/*genetics/metabolism/therapy MH - Promoter Regions, Genetic MH - Protein Structure, Tertiary MH - Recombinant Fusion Proteins/biosynthesis/*genetics MH - Sarcolemma/metabolism MH - Stem Cell Transplantation EDAT- 2006/04/06 09:00 MHDA- 2006/10/04 09:00 CRDT- 2006/04/06 09:00 PHST- 2006/04/06 09:00 [pubmed] PHST- 2006/10/04 09:00 [medline] PHST- 2006/04/06 09:00 [entrez] AID - ddl082 [pii] AID - 10.1093/hmg/ddl082 [doi] PST - ppublish SO - Hum Mol Genet. 2006 May 15;15(10):1610-22. doi: 10.1093/hmg/ddl082. Epub 2006 Apr 4.