| First Author | Karakousi T | Year | 2026 |
| Journal | Cancer Cell | Volume | 44 |
| Issue | 4 | Pages | 792-808.e9 |
| PubMed ID | 41576931 | Mgi Jnum | J:382533 |
| Mgi Id | MGI:8314465 | Doi | 10.1016/j.ccell.2025.12.019 |
| Citation | Karakousi T, et al. (2026) IFNgamma-dependent metabolic reprogramming restrains an immature, pro-metastatic lymphatic state in melanoma. Cancer Cell |
| abstractText | Lymphatic vessels activate anti-tumor immune surveillance and support metastasis. Whether there are distinct lymphatic phenotypes that govern immunity and metastasis remains unclear. Here we reveal that cytotoxic immunity normalizes lymphatic function and uncouples immune and metastatic potential. We demonstrate that intratumoral lymphatic vessel density negatively correlates with cytotoxic immunity and that IFNgamma reprograms the intratumoral lymphatic state. Lymphatic deletion of Ifngr1 expanded the intratumoral lymphatic network and drove the emergence of a tip-like state that promotes lymph node metastasis but not dendritic cell migration or response to immune checkpoint blockade (ICB). Mechanistically, IFNgamma restrains proliferation and cell state programs through inhibition of mitochondrial respiration. Lymphatic-specific inhibition of mitochondrial complex III restrained the intratumoral tip-like state, blocked metastasis, and enhanced the response to ICB. Our data reveal that IFNgamma induces a metabolic and phenotypic switch in tumor-associated lymphatic vessels that blocks regional metastasis and reinforces immune surveillance. |
