FLT1 and neoplasm: While tumor weight in Clo/liposome + IgG1-Fc group, Clo/liposome + VEGFR1-Fc group, Clo/liposome + SIRPα-Fc group and Clo/liposome + VEGFR1-Fc + SIRPα-Fc group were 950.01+ 147.82 mg, 528.16 + 134.24 mg, 814.66 ± 145.58 mg and 513.98 + 84.44 mg.