{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nThe scientific abstracts collectively elucidate the essential role of cyclin G–associated kinase (GAK) in mediating clathrin‐dependent endocytosis—a process critical for cellular homeostasis and development. GAK functions as a key cochaperone for Hsc70, ensuring the efficient uncoating of clathrin‐coated vesicles; without its activity, cells are unable to properly recycle clathrin, leading to profound trafficking defects that compromise embryogenesis and adult tissue function."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "\n \nDisruption or inhibition of GAK—as observed with GAK knockout models and in the context of therapeutic EGFR inhibitors such as gefitinib—results in severe pathophysiological outcomes, including respiratory dysfunction due to altered alveolar cell architecture, highlighting that GAK is as critical as EGFR signaling in maintaining pulmonary integrity."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "3"}]}, {"type": "t", "text": "\n\nIn addition, abrogation of clathrin-mediated trafficking via deletion of GAK induces aberrant cell cycle regulation, characterized by centrosome overduplication coupled with growth arrest and senescence; these findings underscore the broader impact of impaired vesicular trafficking on cellular proliferation and genome stability."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "4"}]}, {"type": "t", "text": "\n\nFinally, tissue-specific deletion studies in podocytes reveal that loss of GAK perturbs intracellular calcium handling and aberrantly activates calpain proteases, driving podocyte damage, glomerular sclerosis, and progressive kidney failure—a cascade that can be mitigated through calpain inhibition."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "5"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Dong-Won Lee, Xiaohong Zhao, Yang-In Yim, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Essential role of cyclin-G-associated kinase (Auxilin-2) in developing and mature mice."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Mol Biol Cell (2008)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1091/mbc.e07-11-1115"}], "href": "https://doi.org/10.1091/mbc.e07-11-1115"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "18434600"}], "href": "https://pubmed.ncbi.nlm.nih.gov/18434600"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Bum-Chan Park, Yang-In Yim, Xiaohong Zhao, et al. "}, {"type": "b", "children": [{"type": "t", "text": "The clathrin-binding and J-domains of GAK support the uncoating and chaperoning of clathrin by Hsc70 in the brain."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Cell Sci (2015)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1242/jcs.171058"}], "href": "https://doi.org/10.1242/jcs.171058"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "26345367"}], "href": "https://pubmed.ncbi.nlm.nih.gov/26345367"}]}, {"type": "r", "ref": 3, "children": [{"type": "t", "text": "Hiroe Tabara, Yoko Naito, Akihiko Ito, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Neonatal lethality in knockout mice expressing the kinase-dead form of the gefitinib target GAK is caused by pulmonary dysfunction."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "PLoS One (2011)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1371/journal.pone.0026034"}], "href": "https://doi.org/10.1371/journal.pone.0026034"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "22022498"}], "href": "https://pubmed.ncbi.nlm.nih.gov/22022498"}]}, {"type": "r", "ref": 4, "children": [{"type": "t", "text": "Maciej B Olszewski, Panagiotis Chandris, Bum-Chan Park, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Disruption of clathrin-mediated trafficking causes centrosome overduplication and senescence."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Traffic (2014)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1111/tra.12132"}], "href": "https://doi.org/10.1111/tra.12132"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "24138026"}], "href": "https://pubmed.ncbi.nlm.nih.gov/24138026"}]}, {"type": "r", "ref": 5, "children": [{"type": "t", "text": "Xuefei Tian, Kazunori Inoue, Yan Zhang, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Inhibiting calpain 1 and 2 in cyclin G associated kinase-knockout mice mitigates podocyte injury."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "JCI Insight (2020)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1172/jci.insight.142740"}], "href": "https://doi.org/10.1172/jci.insight.142740"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "33208557"}], "href": "https://pubmed.ncbi.nlm.nih.gov/33208557"}]}]}]}