ArticleJournal of neuroinflammation2026
SLC27A3-dependent lipid metabolic reprogramming by trilobatin suppresses microglial mtDNA/TLR9-driven inflammatory activation in traumatic brain injury.
Article in Journal of neuroinflammation, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Peri-lesional microglia are particularly sensitive to traumatic brain injury (TBI)-induced disruption of brain lipid homeostasis. This disruption is characterized by elevated levels of acylcarnitines and phospholipids in acute lipidomic profiling, reflecting global lipid alterations. Under physiological conditions, microglial lipid processing involves fatty acid uptake, storage, and mitochondrial oxidation. However, following TBI, excessive fatty acid uptake promotes lipid droplet accumulation, mitochondrial stress, and pro-inflammatory activation. In this study, we investigated whether modulating this process confers therapeutic benefits. Trilobatin (Tri), a natural flavonoid glycoside with potent immunometabolic modulatory activity, markedly reduced neuroinflammation and neuropathological damage while improving motor and cognitive performance in a mouse model of TBI. Integrated transcriptomic and metabolomic analyses revealed that Tri reduced excessive mitochondrial lipid accumulation, alleviated mitochondrial damage, and inhibited mitochondrial DNA release, thereby blocking the TLR9/MyD88/P-P65 pro-inflammatory pathway. Further screening and validation identified that Tri downregulates the lipid transporter SLC27A3, limits excessive lipid uptake, and consequently alleviates microglial pro-inflammatory responses driven by lipid overload. Collectively, these findings establish a link between microglial lipid metabolism and inflammatory activation and support trilobatin as a promising therapeutic agent targeting metabolic-inflammatory crosstalk in acute neural injury.
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