{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nThe transmembrane protein 268 (TMEM268) is a novel regulator implicated in maintaining integrin β4 (ITGB4) homeostasis. Research has demonstrated that deletion of TMEM268 in gastric cancer cells diminishes cell viability, proliferation, and adhesion, induces S‐phase cell cycle arrest, and disrupts cytoskeletal remodeling. Mechanistically, TMEM268 interacts via its C-terminal domain with ITGB4, and its absence accelerates ITGB4 ubiquitin‐mediated degradation. This destabilization leads to a disassociation of the ITGB4/PLEC complex, ultimately impairing cytoskeletal integrity and suppressing both primary tumor growth and metastasis in vivo."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": ""}, {"type": "p", "children": [{"type": "t", "text": "\nIn contrast, other studies of uncharacterized proteins in muscle tissues highlight distinct mechanisms of cellular regulation. For example, the cardiac‐enriched FHL2-interacting protein (CEFIP) localizes to the sarcomeric z-disc and modulates hypertrophic signaling via enhancement of the calcineurin/NFAT pathway in cardiomyocytes, contributing to cardiac remodeling and disease pathogenesis."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}]}, {"type": "t", "text": ""}, {"type": "p", "children": [{"type": "t", "text": "\nSimilarly, genetic investigations in dilated cardiomyopathy have identified C10orf71 as an intrinsically disordered protein critical for proper cardiac contractility, with its loss leading to abnormal heart development and dysfunction. Although these proteins operate in cardiac contexts and through divergent mechanisms, their discovery underscores the broader significance of previously uncharacterized proteins in regulating cellular architecture and signaling. In this landscape, TMEM268’s unique role in sustaining ITGB4 levels and cytoskeletal organization in gastric cancer cells represents a distinct mechanistic pathway with promising therapeutic implications."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "3"}]}]}]}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Dubeiqi Hong, Xuan Zhang, Riyong Li, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Deletion of TMEM268 inhibits growth of gastric cancer cells by downregulating the ITGB4 signaling pathway."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Cell Death Differ (2019)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1038/s41418-018-0223-3"}], "href": "https://doi.org/10.1038/s41418-018-0223-3"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "30361615"}], "href": "https://pubmed.ncbi.nlm.nih.gov/30361615"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Franziska Dierck, Christian Kuhn, Claudia Rohr, et al. "}, {"type": "b", "children": [{"type": "t", "text": "The novel cardiac z-disc protein CEFIP regulates cardiomyocyte hypertrophy by modulating calcineurin signaling."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Biol Chem (2017)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1074/jbc.M117.786764"}], "href": "https://doi.org/10.1074/jbc.M117.786764"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "28717008"}], "href": "https://pubmed.ncbi.nlm.nih.gov/28717008"}]}, {"type": "r", "ref": 3, "children": [{"type": "t", "text": "Yang Li, Ke Ma, Zhujun Dong, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Frameshift variants in C10orf71 cause dilated cardiomyopathy in human, mouse, and organoid models."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Clin Invest (2024)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1172/JCI177172"}], "href": "https://doi.org/10.1172/JCI177172"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "38950288"}], "href": "https://pubmed.ncbi.nlm.nih.gov/38950288"}]}]}]}