4.3 Article

Intraperitoneal administration of synthetic microRNA-214 elicits tumor suppression in an intraperitoneal dissemination mouse model of canine hemangiosarcoma

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VETERINARY RESEARCH COMMUNICATIONS
卷 46, 期 2, 页码 447-457

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SPRINGER
DOI: 10.1007/s11259-021-09869-1

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Antitumor; Canine hemangiosarcoma; Intraperitoneal dissemination mouse model; MicroRNA; miR-214; 5AE

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This study evaluated the effects of miR-214/5AE on a mouse model of HSA and found that it can inhibit tumor growth by inducing apoptosis and suppressing cell proliferation.
Canine hemangiosarcoma (HSA) has an extremely poor prognosis, making it necessary to develop new systemic treatment methods. MicroRNA-214 (miR-214) is one of many microRNAs (miRNA) that can induce apoptosis in HSA cell lines. Synthetic miR-214 (miR-214/5AE), which showed higher cytotoxicity and greater nuclease resistance than mature miR-214, has been developed for clinical application. In this study, we evaluated the effects of miR-214/5AE on stage 2 HSA in a mouse model. Mice intraperitoneally administered with miR-214/5AE (5AE group) had significantly fewer intraperitoneal dissemination tumor foci (median number: 72.5 vs. 237.5; p < 0.05) and a lower median foci weight (0.26 g vs. 0.61 g; p < 0.05). Mice in the 5AE group had increased expression of p53 and cleaved caspase-3, and a significantly lower proportion of Ki-67-positive cells, than those in the non-specific miR group. Notably, no significant side effects were observed. These results indicate that intraperitoneal administration of miR-214/5AE exhibits antitumor effects in an intraperitoneal dissemination mouse model of HSA by inducing apoptosis and suppressing cell proliferation. These results provide a basis for future studies on the antitumor effect of miR-214/5AE for HSA.

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