已发表论文

脂质体姜黄素 (Curcumin) 抑制兔 VX2 肝肿瘤在经导管肝动脉栓塞术后由缺氧诱导的血管生成

 

Authors Dai F, Zhang XM, Shen WR, Chen J, Liu LC, Gao GJ
Received 5 May 2015
Accepted for publication 16 July 2015
Published 15 September 2015 Volume 2015:8 Pages 2601—2611
DOI http://dx.doi.org/10.2147/OTT.S87931
Checked for plagiarism Yes
Review by Single-blind
Peer reviewers approved by Dr Jia Fan
Peer reviewer comments 5
Editor who approved publication:  Dr Faris Farassati

Purpose: The purpose of the study is to investigate the inhibition of hypoxia-induced angiogenesis after embolization in VX2 rabbit liver tumors by liposomal curcumin.
Materials and methods: A total of 54 VX2 rabbits were divided into three groups, and each group had three subgroups according to the sacrifice time. The animals in the control group (n=18) underwent sham embolization. Transcatheter arterial embolization (TAE)-treated group (n=18) animals underwent embolization with lipiodol (0.1 mL/kg body weight) and 90–180 µm polyvinyl alcohol (PVA) particles. Liposomal curcumin TAE-treated group (n=18) animals underwent embolization with liposomal curcumin (20 mg/kg body weight) mixed with lipiodol (0.1 mL/kg body weight) and 90–180 µm PVA particles. After embolization, the animals in each subgroup were sacrificed at 6 hours, 24 hours, and 3 days, and the tumor samples were collected. Immunohistochemical staining was performed to evaluate expression of hypoxia-inducible factor-1α (HIF-1α) and vascular endothelial growth factor (VEGF) proteins, and microvessel density (MVD). Real-time polymerase chain reaction was performed to examine VEGF mRNA levels.
Results: The levels of HIF-1α and VEGF, and MVD in tumors of liposomal curcumin TAE-treated group were significantly decreased compared to the TAE-treated group (<0.05). There was a slight decrease in tumor size in the liposomal curcumin TAE-treated group at third-day time points compared to the TAE-treated group; the difference was not statistically significant (>0.05). The HIF-1α protein correlated considerably with VEGF mRNA (=0.705, =0.001) and protein (=0.655, =0.003), and MVD (=0.521, =0.027). A significant correlation between VEGF protein and MVD was noted as well (=0.519, =0.027).
Conclusion: Liposomal curcumin downregulates HIF-1α protein levels and inhibits hypoxia-induced angiogenesis after embolization in VX2 rabbit liver tumors.
Keywords: hypoxia-inducible factor-1α, angiogenesis, embolization, liver tumor