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• W4382362227 abstract "Abstract Background Ultrasound-targeted microbubble destruction (UTMD) has emerged as a promising strategy for the targeted delivery of bone marrow mesenchymal stem cells (MSCs) to the ischemic myocardium. However, the limited migration capacity and poor survival of MSCs remains a major therapeutic barrier. The present study was performed to investigate the synergistic effect of UTMD with PDGF-BB on the homing of MSCs for acute myocardial infarction (AMI). Methods MSCs from male donor rats were treated by PDGF-BB, and a novel microbubble formulation were prepared by a thin-film hydration method. In vivo, MSCs with or without PDGF-BB pretreatment were transplanted by UTMD after inducing AMI in experimental rats. The therapeutic efficacy of PDGF-BB-Primed MSCs on myocardial apoptosis, angiogenesis, cardiac function and scar repair was estimated. In vitro, the effect and molecular mechanism of PDGF-BB on MSCs migration and survival were explored. Results The results showed that the biological effects of UTMD increased local levels of SDF-1, which promoted the migration of transplanted MSCs to the ischemic region. Compared with UTMD alone, UTMD combined with PDGF-BB pretreatment significantly increased the cardiac homing of MSCs, which subsequently reduced myocardial apoptosis, promoted neovascularization and tissue repair, and increased cardiac function 30 days after MI. In vitro results showed that PDGF-BB enhanced MSC migration, and protected these cells from H 2 O 2 -induced apoptosis. Mechanistically, PDGF-BB pretreatment promoted MSCs migration and inhibited H 2 O 2 -induced MSC apoptosis via activation of the PI3K/Akt pathway. Further, crosstalk between PDGF-BB and SDF-1/CXCR4 is involved in the PI3K/AKT signaling pathway. Conclusion The present study demonstrated that UTMD combined with PDGF-BB treatment could enhance the homing ability of MSCs, thus alleviating AMI in rats. Therefore, UTMD combined with PDGF-BB pretreatment may offer exciting therapeutic opportunities for strengthening MSC therapy in ischemic diseases." @default.
• W4382362227 created "2023-06-29" @default.
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• W4382362227 date "2023-06-28" @default.
• W4382362227 modified "2023-10-18" @default.
• W4382362227 title "Ultrasound-Targeted Microbubble Destruction Promotes PDGF-Primed Bone Mesenchymal Stem Cells Transplantation for Myocardial Protection in Acute Myocardial Infarction of rats" @default.
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• W4382362227 doi "https://doi.org/10.21203/rs.3.rs-3092824/v1" @default.
• W4382362227 hasPublicationYear "2023" @default.
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