Nature CommunicationsCaffeine enhances antitumor T-cell activity by suppressing kynurenine pathway in colorectal cancerYuechen LiuZhengyu LiuYating HuYunyan LingShunjie QingYang LiuYizhi ZhanZhiyong ShenYuan FangHaijun Deng2025-07-01Full textDOI https://doi.org/10.1038/s41467-025-60958-0