title: Umbilical cord blood-derived progenitor cells enhance muscle regeneration in mouse hindlimb ischemia model.
abstract: Progenitor cell therapy is a potential new treatment option for ischemic conditions in the myocardium and skeletal muscles. However, it remains unclear whether umbilical cord blood (UCB)-derived progenitor cells can provide therapeutic effects in ischemic muscles and whether ex vivo gene transfer can be used for improving the effect. In this study, the use of a lentiviral vector led to efficient transduction of both UCB-derived hematopoietic stem cells (HSCs) and mesenchymal stem cells (MSCs). Our method resulted in a long-term transgene expression and did not alter the differentiation potential of either HSCs or MSCs. In addition, we studied the therapeutic potential of CD133(+) and MSC progenitor cells transduced ex vivo with lentiviruses encoding the mature form of vascular endothelial growth factor D (VEGF-D(DeltaNDeltaC)) or the enhanced green fluorescent protein (eGFP) marker gene in a nude mouse model of skeletal muscle ischemia. Progenitor cells enhanced the regeneration of ischemic muscles without a detectable long-term engraftment of either CD133(+) or MSC progenitor cells. Our results show that, rather than directly participating in angiogenesis or skeletal myogenesis, UCB-derived progenitor cells indirectly enhance the regenerative capacity of skeletal muscle after acute ischemic injury. However, VEGF-D gene transfer of progenitor cells did not improve the therapeutic effect in ischemic muscles.
authors: Department of Molecular Medicine, A.I. Virtanen Institute, University of Kuopio, Kuopio, Finland.
authors: Jonna K
authors: JK
authors: Koponen
authors: Tuija
authors: T
authors: Kekarainen
authors: Suvi
authors: S
authors: E Heinonen
authors: Anita
authors: A
authors: Laitinen
authors: Johanna
authors: J
authors: Nystedt
authors: Jarmo
authors: J
authors: Laine
authors: Seppo
authors: S
authors: Ylä-Herttuala
mesh_terms: D000818:Animals; D005312:Fetal Blood / Q000166:cytology*; D006614:Hindlimb / Q000098:blood supply*; D007511:Ischemia / Q000503:physiopathology*; D051379:Mice; D008819:Mice, Nude; D023421:Models, Animal; D018482:Muscle, Skeletal / Q000503:physiopathology*; D012038:Regeneration; D013234:Stem Cells / Q000166:cytology*