Construction of RGD-TAT modified liposomes and evaluation of its targeting on glioma / 中国生化药物杂志

ABSTRACT

Objective To construct RGD-TAT modified liposomes(RGD-TAT-LPs)and evaluate its glioma targeting efficiency.Methods RGD-TAT-LPs was constructed by film-ultrasonic method,its appearance,particle size and Zeta potential were mearsured. Cellular uptake of LPs,TAT-LPs, RGD-LPs and RGD-TAT-LPs was used to evaluate the affinity to C6 cells.C6 cells were xenografted in athymic mice to establish the animal model,which were used to evaluate the distribution of liposomes in vivo. Results The particle diameter of RGD-TAT-LPs was (1 16.5 ±1 1.3 )nm,and its Zeta potential was (23.2 ±3.5 )mV. Cellular uptake experiments demonstrated the cell uptake efficiency of RGD-TAT-LPs by C6 cells were 2.9-fold,2.3-fold and 4.7-fold than that of RGD-LPs,TAT-LPs and LPs respectively. The in vivo imaging showed that RGD-TAT-LPs had the strongest fluorescence intensity in brain. Conclusion The RGD-TAT-LPs might serve as a promising delivery system of antitumor drugs.