{"id":236839,"date":"2026-05-09T19:06:32","date_gmt":"2026-05-10T00:06:32","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2026\/05\/reprogramming-myeloid-crosstalk-overcomes-immune-resistance-in-colorectal-cancer"},"modified":"2026-05-09T19:06:32","modified_gmt":"2026-05-10T00:06:32","slug":"reprogramming-myeloid-crosstalk-overcomes-immune-resistance-in-colorectal-cancer","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2026\/05\/reprogramming-myeloid-crosstalk-overcomes-immune-resistance-in-colorectal-cancer","title":{"rendered":"Reprogramming myeloid crosstalk overcomes immune resistance in colorectal cancer"},"content":{"rendered":"<p style=\"padding-right: 20px\"><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/reprogramming-myeloid-crosstalk-overcomes-immune-resistance-in-colorectal-cancer2.jpg\"><\/a><\/p>\n<p>Immunotherapy resistance remains a significant clinical challenge in the treatment of colorectal cancer. A recent study by Mount Sinai researchers, published in <i><i>Cell Reports<\/i> Medicine<\/i>, reveals that overcoming this resistance requires more than just activating cancer-fighting T cells; it depends on restoring crucial communication between T cells and myeloid cells, specifically macrophages. Using advanced preclinical models and single-cell analyses, the research team identified exhausted T cells and immunosuppressive macrophages as key drivers of treatment failure. To counter this, they tested a novel combination therapy that targets multiple immune checkpoint proteins (PD-1, CTLA-4, and LAG3) alongside TREM2, a marker found on suppressive macrophages. By successfully reprogramming the tumor microenvironment to simultaneously reinvigorate T cells and neutralize suppressive macrophages, this combination strategy achieved up to 100% tumor clearance in mismatch repair-deficient cancer models and over 70% clearance in typically resistant mismatch repair-proficient models. Furthermore, the approach established long-lasting immune memory against cancer recurrence, highlighting the profound clinical potential of rationally designed combination immunotherapies that address both T cell dysfunction and the suppressive tumor environment.<\/p>\n<hr>\n<p>Mestrallet et al. show that T cell-myeloid interactions determine response to PD-1 blockade in colorectal cancer. Targeting TREM2 macrophages together with LAG3, CTLA4, and PD-1 reprograms the tumor microenvironment and drives antitumor immunity, achieving up to 100% tumor clearance in mismatch repair-deficient and 70% in mismatch repair-proficient models.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Immunotherapy resistance remains a significant clinical challenge in the treatment of colorectal cancer. A recent study by Mount Sinai researchers, published in Cell Reports Medicine, reveals that overcoming this resistance requires more than just activating cancer-fighting T cells; it depends on restoring crucial communication between T cells and myeloid cells, specifically macrophages. Using advanced preclinical [\u2026]<\/p>\n","protected":false},"author":461,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-236839","post","type-post","status-publish","format-standard","hentry","category-biotech-medical"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/236839","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/461"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=236839"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/236839\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=236839"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=236839"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=236839"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}