Tumor microtube (TMT)

Tumor microtubes are actin-based tubular protrusions that interconnect cancer cells, forming dynamic networks within tumors. These structures have been observed in various cancers, including pancreatic cancer. Tumor microtubes contain actin filaments, microtubules, and intermediate filaments such as cytokeratin 19[1]. They differ from tunneling nanotubes in their cytoskeletal architecture and do not allow for the intercellular transfer of cytoplasmic contents like GFP[1]. Their formation is dependent on actin polymerization and the Arp2/3 complex but not on microtubule integrity or cytokinesis[1]. Tumor microtube-based network morphology refers to the overall pattern formed by these interconnected protrusions rather than a single molecular entity or receptor. As such, "tumor microtube-based network morphology" is not a canonical therapeutic target but rather describes a structural phenomenon relevant to tumor biology and potentially to therapy resistance[2][3]. Note: The term "tumor microtube-based network morphology" does not refer to a specific molecule or receptor but instead describes the collective arrangement of tumor cell protrusions. Therefore, it is not considered a therapeutic target in the conventional sense (e.g., enzyme or receptor), making this entry incorrect as a molecular drug target.

Other names

Tumor microtubesTMTsactin-based tubular connectionsmembrane nanotubes (context-dependent)cytonemes (context-dependent)