Regulation of angiogenesis through the efficient delivery of microRNAs into endothelial cells using polyamine-coated carbon nanotubes

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• 作者：Andrea Masotti ; PhD^a ; ^{andrea.masotti@opbg.net" class="auth_mail" title="E-mail the corresponding author} ; Mark R. Miller ; PhD^b ; Antonella Celluzzi ; PhD^a ; Lorraine Rose ; MSc^b ; Federico Micciulla ; MSc Eng^c ; Patrick W.F. Hadoke ; PhD^b ; Stefano Bellucci ; PhD^c ; Andrea Caporali ; PhD^b
• 关键词：MicroRNA ; Endothelial cell ; Carbon nanotube ; Polyamine ; Angiogenesis
• 刊名：Nanomedicine: Nanotechnology, Biology and Medicine
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：12
• 期：6
• 页码：1511-1522
• 全文大小：1963 K

文摘

MicroRNAs (miRNAs) directly regulate gene expression at a post-transcriptional level and represent an attractive therapeutic target for a wide range of diseases. Here, we report a novel strategy for delivering miRNAs to endothelial cells (ECs) to regulate angiogenesis, using polymer functionalized carbon nanotubes (CNTs). CNTs were coated with two different polymers, polyethyleneimine (PEI) or polyamidoamine dendrimer (PAMAM), followed by conjugation of miR-503 oligonucleotides as recognized regulators of angiogenesis. We demonstrated a reduced toxicity for both polymer-coated CNTs, compared with pristine CNTs or polymers alone. Moreover, polymer-coated CNT stabilized miR-503 oligonucleotides and allowed their efficient delivery to ECs. The functionality of PAMAM-CNT-miR-503 complexes was further demonstrated in ECs through regulation of target genes, cell proliferation and angiogenic sprouting and in a mouse model of angiogenesis. This comprehensive series of experiments demonstrates that the use of polyamine-functionalized CNTs to deliver miRNAs is a novel and effective means to regulate angiogenesis.