在一项针对小鼠的研究中,一种益生菌代谢产物被发现能够抑制黑色瘤的肿瘤生长。
尽管免疫检查点抑制剂(如抗 PD-1)在黑色瘤治疗方面取得了革命性进展,但仍有超过一半的患者无法获得疗效或最终产生耐药性。肿瘤微环境和肠道微生物群正日益被认为是影响治疗效果的关键因素。
研究人员发现,特定益生菌产生的代谢物,具体是丁酸盐,能够显著减缓黑色瘤模型小鼠的肿瘤体积增长。这种丁酸盐通过影响肿瘤微环境中的免疫细胞,特别是增加 T 细胞的浸润和活性,从而发挥了抗肿瘤作用。
该研究还表明,接受丁酸盐治疗的小鼠,其肿瘤组织中炎症标志物水平有所降低,并且肿瘤细胞的增殖速度减慢。此外,研究人员通过对小鼠肠道菌群进行分析,发现丁酸盐能够调节菌群组成,使其向有利于抗肿瘤反应的方向发展。
尽管这项研究是在小鼠模型中进行的,但其结果为开发基于肠道微生物的黑色瘤辅助治疗策略提供了新的思路。研究团队表示,未来将进一步探索丁酸盐在人体中的安全性和有效性,并研究其与其他治疗方法的联合应用潜力。
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