λ-Carrageenan, a seaweed-derived polysaccharide, is commonly utilized as a proinflammatory agent in basic research and has also been identified as a potent antitumor agent [1].

λ-Carrageenan（每两天50 mg/kg；肿瘤内注射）在携带B16-F10和4T1的小鼠中抑制肿瘤生长[1]。λ-Carrageenan通过肿瘤内注射展现出显著的抗肿瘤效果，并显著提高了肿瘤免疫反应，增加了免疫刺激细胞的浸润并提升了促炎细胞因子的产生[1]。