{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\n Citron Rho‐interacting kinase (CIT) is a serine/threonine kinase that plays a pivotal role in the regulation of cytokinesis and cell division. During late mitosis, CIT localizes at the cleavage furrow and midbody, where its kinase activity is essential for proper midbody organization and successful abscission. Disruption of CIT function—by mutation or impaired kinase activity—leads to cytokinesis failure, resulting in multinucleated cells, increased apoptosis, and, in specific developmental contexts such as in neural progenitors, primary microcephaly and related defects."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "4"}]}, {"type": "t", "text": "\n "}]}, {"type": "t", "text": "\n "}, {"type": "p", "children": [{"type": "t", "text": "\n Beyond its fundamental role in cell division, CIT interacts with several proteins that coordinate spindle dynamics and abscission. For example, its association with kinesin motor proteins (such as KIF14) and regulatory factors (such as TTC3) underscores its importance in linking mitotic spindle organization with the execution of cytokinesis."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "5"}]}, {"type": "t", "text": "\n Moreover, CIT can modulate the stability of midbody microtubules—partly through the phosphorylation of key cytoskeletal components—ensuring the structural integrity necessary for cell separation.\n "}]}, {"type": "t", "text": "\n "}, {"type": "p", "children": [{"type": "t", "text": "\n In addition to its developmental functions, aberrant CIT expression and activity are emerging as important contributors to oncogenesis. Elevated CIT levels have been observed in various tumors, including prostate, pancreatic, multiple myeloma, and bladder cancers. In these contexts, overexpression of CIT supports enhanced cell proliferation, promotes survival, and may influence epithelial-to-mesenchymal transition and other oncogenic signaling pathways."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "7", "end_ref": "10"}]}, {"type": "t", "text": "\n Thus, CIT not only is vital for normal developmental cytokinesis but also becomes misregulated in cancer, representing a promising target for therapeutic intervention.\n "}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Murugan Paramasivam, Yoon Jeung Chang, Joseph J LoTurco "}, {"type": "b", "children": [{"type": "t", "text": "ASPM and citron kinase co-localize to the midbody ring during cytokinesis."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Cell Cycle (2007)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.4161/cc.6.13.4356"}], "href": "https://doi.org/10.4161/cc.6.13.4356"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "17534152"}], "href": "https://pubmed.ncbi.nlm.nih.gov/17534152"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Hongda Li, Stephanie L Bielas, Maha S Zaki, et al. 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