{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\n Cytochrome P450 4F11 is an enzyme that participates in the ω‐hydroxylation of endogenous lipophilic compounds, thereby contributing to both vitamin and fatty acid metabolism. In the context of vitamin K metabolism, CYP4F11—along with CYP4F2—is capable of ω‐hydroxylating menaquinone-4 (MK4), although unlike CYP4F2 it does not catalyze the subsequent conversion to the ω–acid, indicating a selective role in modulating vitamin K catabolism."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": " Moreover, CYP4F11 is identified as the predominant catalyst in the ω–hydroxylation of 3–hydroxy fatty acids such as 3–hydroxystearate and 3–hydroxypalmitate, implying that it modulates the levels of these metabolites particularly under pathological states marked by aberrant fatty acid mobilization or impaired mitochondrial β–oxidation."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}]}, {"type": "t", "text": ""}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n Its expression is subject to multifaceted regulation; for instance, retinoic acids can down–regulate CYP4F11 transcription in human keratinocyte–derived cells via retinoic acid receptors and interactions with signaling cascades such as the JNK pathway."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "3"}]}, {"type": "t", "text": " Additionally, genetic variants of CYP4F11—including substitutions like D315N and D446N—can diminish its intrinsic catalytic clearance, which in turn may affect its ability to synthesize bioactive metabolites such as 20–hydroxyeicosatetraenoic acid (20–HETE), a regulator of vascular tone and other aspects of cellular signaling."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "4"}]}, {"type": "t", "text": ""}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n Beyond its metabolic functions, CYP4F11 expression is inducible by nuclear receptor pathways; activation of liver X receptor α (LXRα) increases CYP4F11 transcription, an effect associated with reduced levels of pro–inflammatory cytokines (TNF–α and IL–1β) and suggesting a potential role in mediating anti–inflammatory responses."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "5"}]}, {"type": "t", "text": " Furthermore, genetic polymorphisms in CYP4F11 have been investigated in clinical contexts—for example, in studies examining variability in drug response and adverse events such as low–dose aspirin–induced small bowel bleeding—implying that inter–individual differences in CYP4F11 activity may influence drug metabolism and therapeutic outcomes."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "6"}]}, {"type": "t", "text": ""}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n Changes in the expression of CYP4F11 have also been observed in hepatic cell models subjected to altered lipid and inflammatory stimuli, supporting its function within the network of fatty acid metabolism and cellular stress responses."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "7"}]}, {"type": "t", "text": " In a medicinal chemistry context, CYP4F11–mediated metabolism has been exploited to convert oxalic acid diamide prodrugs into active stearoyl–CoA desaturase inhibitors, highlighting its potential utility in the design and optimization of novel therapeutics."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "8"}]}, {"type": "t", "text": "\n "}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Katheryne Z Edson, Bhagwat Prasad, Jashvant D Unadkat, et al. 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