Interstitial cells of Cajal–related markers (ICC markers) (ICC markers)

Interstitial cells of Cajal (ICC) are specialized mesenchymal cells located within the muscularis propria of the gastrointestinal tract, where they function as electrical pacemakers and mediators of neuromuscular transmission (PMID: 9461263). The markers associated with these cells, most notably the receptor tyrosine kinase c-Kit (CD117) and the calcium-activated chloride channel Anoctamin-1 (ANO1, also known as DOG1), are critical for the development, maintenance, and identification of ICCs (UniProt P10721, Q5XXA6). In clinical oncology, these markers are the gold standard for diagnosing Gastrointestinal Stromal Tumors (GIST), which typically arise from the ICC lineage and exhibit high expression of both c-Kit and ANO1 (PMID: 15003977). Therapeutic intervention often involves the use of tyrosine kinase inhibitors (TKIs) like imatinib, which target the constitutively active c-Kit signaling that drives GIST progression (StatPearls: Gastrointestinal Stromal Tumors). Beyond cancer, a reduction in the density or distribution of ICC-related markers is a hallmark of various gastrointestinal motility disorders, such as gastroparesis, slow-transit constipation, and Hirschsprung disease, reflecting the loss of pacemaker function (PMID: 20570164).

Other names

ICC markersc-KitCD117Anoctamin-1ANO1DOG1Discovered on GIST 1KITSCFRMast/stem cell growth factor receptor

Inhibition of the receptor tyrosine kinase c-Kit (CD117) to block downstream signaling pathways (e.g., PI3K/AKT, MAPK) that drive cell proliferation and survival in GIST; ANO1 serves as a marker and potential target for modulating chloride-driven pacemaker currents (PMID: 15003977, StatPearls: Gastrointestinal Stromal Tumors).