Abstract:
:Stem cell mobilization to injured tissue contributes to neovascularization, resulting in regeneration after myocardial infarction (MI). We previously showed that direct cardiac injection of a recombinant lentivirus (LV) that engineers expression of membrane-bound stem cell factor (mSCF) improves outcomes immediately after MI. In this study, we evaluated the effect of neonatal LV/mSCF transduction on MI outcomes in aged mice. We constructed a recombinant LV harboring an α-myosin heavy chain promoter that drives mSCF expression and injected it into the temporal vein of neonatal mice. One year later, sustained expression of mSCF in the adult mouse hearts was detected by genomic and quantitative RT-PCR and immunohistochemistry. To evaluate the contribution of neonatal LV/mSCF delivery to recovery from MI, we induced an MI in adult LV/mSCF-transduced, LV only-transduced, and nontransduced control mice. Strikingly, LV/mSCF transduction reduced infarct scar size, enhanced angiogenesis, improved ventricular function, and significantly increased survival of the mice. Regional overexpression of CD11b, a marker of monocytes and proangiogenic cells, was observed on monocytes isolated from the infarcted hearts of LV/mSCF-transduced mice. Our data suggest a model of neonatal gene delivery that leads to sustained mSCF expression during adulthood to aid recovery from MI and prevent heart failure.
journal_name
Hum Gene Therjournal_title
Human gene therapyauthors
Sun Z,Lee CJ,Mejia-Guerrero S,Zhang Y,Higuchi K,Li RK,Medin JAdoi
10.1089/hum.2012.063subject
Has Abstractpub_date
2012-12-01 00:00:00pages
1280-9issue
12eissn
1043-0342issn
1557-7422journal_volume
23pub_type
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