FLT1 and neoplasm: Tumor weight in PBS/liposome + IgG1-Fc group, PBS/liposome + VEGFR1-Fc group, PBS/liposome + SIRPα-Fc group, PBS/liposome + VEGFR1-Fc + SIRPα-Fc group were 916.62 ± 113.49 mg, 516.00 ± 78.29 mg, 360.20 ± 68.34 mg, 112.12 ± 28.84 mg.