{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nRecent studies have highlighted the critical role that actin‐binding proteins play in regulating cell behavior, with implications for both normal physiology and disease. For example, one study in bladder cancer revealed that the tumor‐suppressive microRNA miR-574-3p down-regulates MESDC1—a predicted novel actin-binding protein whose loss reduces cellular proliferation, migration, and invasion while triggering apoptosis. Although MESDC1’s specific molecular functions remain to be fully defined, its involvement in modulating actin dynamics suggests that actin regulators may have oncogenic or tumor‐suppressive roles in malignant tissues."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn a complementary study focused on TLNRD1 (talin rod domain-containing protein 1), researchers demonstrated that TLNRD1 is an α-helical protein structurally homologous to the talin R7R8 rod domains. TLNRD1 directly binds F-actin and, uniquely, forms an antiparallel dimer that bundles actin filaments. In addition, it interacts with LD motif-containing proteins such as RIAM and KANK, paralleling the interactions observed for talin and thereby linking intracellular signaling pathways with cytoskeletal architecture."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n"}, {"type": "p", "children": [{"type": "t", "text": "\nWithin cells, TLNRD1 localizes to actin-rich structures including filopodia, where its increased expression enhances filopodia formation and promotes cell migration on two-dimensional substrates. These findings collectively position TLNRD1 as a multifaceted actin-regulatory protein that not only recapitulates diverse interactions of talin R7R8 but also confers distinct functional advantages—such as actin bundling and the facilitation of membrane protrusions—that are essential for dynamic cell motility."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Shuichi Tatarano, Takeshi Chiyomaru, Kazumori Kawakami, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Novel oncogenic function of mesoderm development candidate 1 and its regulation by MiR-574-3p in bladder cancer cell lines."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Int J Oncol (2012)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.3892/ijo.2011.1294"}], "href": "https://doi.org/10.3892/ijo.2011.1294"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "22179486"}], "href": "https://pubmed.ncbi.nlm.nih.gov/22179486"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Alana R Cowell, Guillaume Jacquemet, Abhimanyu K Singh, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Talin rod domain-containing protein 1 (TLNRD1) is a novel actin-bundling protein which promotes filopodia formation."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Cell Biol (2021)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1083/jcb.202005214"}], "href": "https://doi.org/10.1083/jcb.202005214"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "34264272"}], "href": "https://pubmed.ncbi.nlm.nih.gov/34264272"}]}]}]}