{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nA careful review of the provided abstracts does not reveal any mention of PLCH1‐AS1. Instead, these studies focus predominantly on the role of the zinc metallopeptidase ZMPSTE24—which is essential for processing the farnesylated prelamin A precursor into mature lamin A—to maintain nuclear envelope integrity, proper chromatin organization, and genomic stability. Disruption in ZMPSTE24 function leads to nuclear abnormalities that are associated with premature aging syndromes, such as Hutchinson–Gilford progeria, and other laminopathies. These reports demonstrate that defects in prelamin A processing compromise DNA repair fidelity and activate stress pathways, ultimately contributing to accelerated aging phenotypes."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "5"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nOther abstracts delve into the cellular consequences of ZMPSTE24 deficiency, reporting outcomes such as delayed recruitment of DNA repair proteins, altered histone modifications and epigenetic marks, and activation of cell cycle checkpoints and senescence pathways. These molecular and phenotypic changes translate into systemic effects including muscle weakness, osteoporosis, metabolic alterations, and even resistance to fibrosis under certain conditions. Taken together, the studies highlight how impaired prelamin A processing contributes to genomic instability and deregulated cellular homeostasis, fueling multiple premature aging and degenerative disease processes."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "6", "end_ref": "15"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nA further subset of these articles extends the functional repertoire of ZMPSTE24 beyond nuclear homeostasis to include roles in host defense mechanisms. In particular, ZMPSTE24 partners with interferon‐induced transmembrane proteins to restrict the entry of multiple enveloped viruses—including influenza and coronaviruses—by impeding virus–cell fusion. These antiviral functions appear independent of its catalytic activity and highlight the enzyme’s involvement in broader metabolic and inflammatory pathways that could be exploited therapeutically. Nonetheless, throughout all these studies there is no indication that PLCH1‐AS1 is functionally implicated in these processes, leaving its role unaddressed by the current literature."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "16", "end_ref": "20"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Alberto M Pendás, Zhongjun Zhou, Juan Cadiñanos, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Defective prelamin A processing and muscular and adipocyte alterations in Zmpste24 metalloproteinase-deficient mice."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Nat Genet (2002)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1038/ng871"}], "href": "https://doi.org/10.1038/ng871"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "11923874"}], "href": "https://pubmed.ncbi.nlm.nih.gov/11923874"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Martin O Bergo, Bryant Gavino, Jed Ross, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Zmpste24 deficiency in mice causes spontaneous bone fractures, muscle weakness, and a prelamin A processing defect."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Proc Natl Acad Sci U S A (2002)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1073/pnas.192460799"}], "href": "https://doi.org/10.1073/pnas.192460799"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "12235369"}], "href": "https://pubmed.ncbi.nlm.nih.gov/12235369"}]}, {"type": "r", "ref": 3, "children": [{"type": "t", "text": "Loren G Fong, Jennifer K Ng, Margarita Meta, et al. 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"}, {"type": "b", "children": [{"type": "t", "text": "Accelerated ageing in mice deficient in Zmpste24 protease is linked to p53 signalling activation."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Nature (2005)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1038/nature04019"}], "href": "https://doi.org/10.1038/nature04019"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "16079796"}], "href": "https://pubmed.ncbi.nlm.nih.gov/16079796"}]}, {"type": "r", "ref": 6, "children": [{"type": "t", "text": "Catherine Coffinier, Sarah E Hudon, Roger Lee, et al. 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"}, {"type": "b", "children": [{"type": "t", "text": "Accelerated aging in articular cartilage by ZMPSTE24 deficiency leads to osteoarthritis with impaired metabolic signaling and epigenetic regulation."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Cell Death Dis (2023)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1038/s41419-023-05856-3"}], "href": "https://doi.org/10.1038/s41419-023-05856-3"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "37217512"}], "href": "https://pubmed.ncbi.nlm.nih.gov/37217512"}]}]}]}