{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nNote: Although the query asks about “UTP15,” none of the provided abstracts mention UTP15. Instead, they collectively characterize the functions of the serine hydrolase ABHD6. ABHD6 plays a pivotal role in controlling endocannabinoid (2-arachidonoylglycerol, 2‑AG) levels in the brain. Functional proteomic mapping has shown that while the majority of 2‑AG hydrolysis is mediated by monoacylglycerol lipase, ABHD6—in concert with other enzymes and interacting partners such as CPT1C—contributes to the fine‐tuning of 2‑AG signaling in both neurons and microglia. Moreover, ABHD6 activity in select brain regions (e.g., in the ventromedial hypothalamus) influences not only synaptic plasticity through regulation of AMPA receptor trafficking and extrasynaptic GABA_A receptor currents but also seizure susceptibility and neuro-metabolic adaptations."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "6"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn peripheral tissues, ABHD6 is instrumental in modulating lipid signal transduction and energy homeostasis. In pancreatic β‑cells, for example, ABHD6 negatively regulates glucose-stimulated insulin secretion by controlling levels of lipolysis-derived monoacylglycerols that activate vesicle priming proteins. Moreover, experimental knockdown or genetic deletion of ABHD6 in peripheral metabolic tissues confers protection against high-fat-diet–induced obesity, hepatic steatosis, and insulin resistance. Pharmacological studies using inhibitors such as UCM710 further validate the importance of ABHD6 in modulating the balance between glycerophospholipid metabolism and endocannabinoid signaling, underscoring its potential as a therapeutic target in metabolic disorders."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "7", "end_ref": "11"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nAdditional findings expand the functional spectrum of ABHD6 to include roles in liver physiology, thermogenesis, and immune regulation. Although hepatocytes are protected from endocannabinoid-induced cytotoxicity mainly by fatty acid amide hydrolase (FAAH), ABHD6’s action appears nuanced within hepatic contexts. In adipose tissue, adipose-specific deletion of ABHD6 enhances cold-induced thermogenesis via a 2‑monoacylglycerol/PPARα signaling cascade that boosts the glycerolipid/free fatty acid cycling, while its deletion in adipose macrophages modulates proinflammatory polarization linked to obesity. These multifaceted roles highlight ABHD6 as a central regulator of both metabolic and inflammatory processes."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "12", "end_ref": "14"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Jacqueline L Blankman, Gabriel M Simon, Benjamin F Cravatt "}, {"type": "b", "children": [{"type": "t", "text": "A comprehensive profile of brain enzymes that hydrolyze the endocannabinoid 2-arachidonoylglycerol."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Chem Biol (2007)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1016/j.chembiol.2007.11.006"}], "href": "https://doi.org/10.1016/j.chembiol.2007.11.006"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "18096503"}], "href": "https://pubmed.ncbi.nlm.nih.gov/18096503"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "William R Marrs, Jacqueline L Blankman, Eric A Horne, et al. "}, {"type": "b", "children": [{"type": "t", "text": "The serine hydrolase ABHD6 controls the accumulation and efficacy of 2-AG at cannabinoid receptors."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Nat Neurosci (2010)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1038/nn.2601"}], "href": "https://doi.org/10.1038/nn.2601"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "20657592"}], "href": "https://pubmed.ncbi.nlm.nih.gov/20657592"}]}, {"type": "r", "ref": 3, "children": [{"type": "t", "text": "Cristina Miralpeix, Ana Cristina Reguera, Anna Fosch, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Carnitine palmitoyltransferase 1C negatively regulates the endocannabinoid hydrolase ABHD6 in mice, depending on nutritional status."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Br J Pharmacol (2021)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1111/bph.15377"}], "href": "https://doi.org/10.1111/bph.15377"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "33444462"}], "href": "https://pubmed.ncbi.nlm.nih.gov/33444462"}]}, {"type": "r", "ref": 4, "children": [{"type": "t", "text": "Alexandre Fisette, Stephanie Tobin, Léa Décarie-Spain, et al. "}, {"type": "b", "children": [{"type": "t", "text": "α/β-Hydrolase Domain 6 in the Ventromedial Hypothalamus Controls Energy Metabolism Flexibility."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Cell Rep (2016)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1016/j.celrep.2016.10.004"}], "href": "https://doi.org/10.1016/j.celrep.2016.10.004"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "27783937"}], "href": "https://pubmed.ncbi.nlm.nih.gov/27783937"}]}, {"type": "r", "ref": 5, "children": [{"type": "t", "text": "Ruth Westenbroek, Joshua Kaplan, Katie Viray, et al. "}, {"type": "b", "children": [{"type": "t", "text": "The serine hydrolase ABHD6 controls survival and thermally induced seizures in a mouse model of Dravet syndrome."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Neurobiol Dis (2023)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1016/j.nbd.2023.106099"}], "href": "https://doi.org/10.1016/j.nbd.2023.106099"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "36990366"}], "href": "https://pubmed.ncbi.nlm.nih.gov/36990366"}]}, {"type": "r", "ref": 6, "children": [{"type": "t", "text": "Mengping Wei, Lei Yang, Feng Su, et al. 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