{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nRecent evidence underscores a growing appreciation for the diversity of regulatory mechanisms orchestrating specialized cellular functions. Studies investigating dual‐specificity tyrosine‐phosphorylated and regulated kinases have revealed complex patterns of tissue‐specific splicing and activity that contribute to signaling diversity during cell differentiation and survival."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": " Although these reports focus primarily on kinase isoforms, they set the stage for understanding how additional layers of regulation—such as post‐transcriptional control by microRNAs—integrate into these signaling networks.\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn the context of the central nervous system, emerging studies indicate that MIR219B (often detected as miR-219 or its mature form miR-219-5p) plays a critical inhibitory role in excitatory neurotransmission. In patients with mesial temporal lobe epilepsy, an inverse relationship was observed between miR-219 levels and the expression of the NMDA receptor subunit NR1 in both the hippocampus and amygdala. These data suggest that MIR219B normally acts to restrain NMDA receptor–mediated excitatory signaling, and its dysregulation may contribute to epileptogenesis."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "3"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nAdditional work in non‐neuronal tissue highlights another facet of MIR219B function. In studies examining wound healing, miR-219-5p was found to target TMEM98 in keratinocytes, thereby inhibiting cell proliferation and migration—processes essential for effective wound closure. This observation broadens the biological significance of MIR219B, suggesting that through its capacity to modulate gene expression, it may influence both neural excitability and tissue repair."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "4"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "F Sacher, C Möller, W Bone, et al. "}, {"type": "b", "children": [{"type": "t", "text": "The expression of the testis-specific Dyrk4 kinase is highly restricted to step 8 spermatids but is not required for male fertility in mice."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Mol Cell Endocrinol (2007)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1016/j.mce.2006.12.041"}], "href": "https://doi.org/10.1016/j.mce.2006.12.041"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "17292540"}], "href": "https://pubmed.ncbi.nlm.nih.gov/17292540"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Chrisovalantis Papadopoulos, Krisztina Arato, Eva Lilienthal, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Splice variants of the dual specificity tyrosine phosphorylation-regulated kinase 4 (DYRK4) differ in their subcellular localization and catalytic activity."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Biol Chem (2011)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1074/jbc.M110.157909"}], "href": "https://doi.org/10.1074/jbc.M110.157909"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "21127067"}], "href": "https://pubmed.ncbi.nlm.nih.gov/21127067"}]}, {"type": "r", "ref": 3, "children": [{"type": "t", "text": "Osmi Hamamoto, Daniela Pretti da Cunha Tirapelli, Fermino Sanches Lizarte Neto, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Modulation of NMDA receptor by miR-219 in the amygdala and hippocampus of patients with mesial temporal lobe epilepsy."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Clin Neurosci (2020)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1016/j.jocn.2020.02.024"}], "href": "https://doi.org/10.1016/j.jocn.2020.02.024"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "32111564"}], "href": "https://pubmed.ncbi.nlm.nih.gov/32111564"}]}, {"type": "r", "ref": 4, "children": [{"type": "t", "text": "Q Tang, H Ran "}, {"type": "b", "children": [{"type": "t", "text": "MicroRNA-219-5p inhibits wound healing by targeting TMEM98 in keratinocytes under normoxia and hypoxia condition."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Eur Rev Med Pharmacol Sci (2018)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.26355/eurrev_201810_16026"}], "href": "https://doi.org/10.26355/eurrev_201810_16026"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "30338788"}], "href": "https://pubmed.ncbi.nlm.nih.gov/30338788"}]}]}]}