Exp Neurobiol 2016; 25(5): 262-268
Published online October 31, 2016
© The Korean Society for Brain and Neural Sciences
Ji-Won Lee1, Hyeri Nam1 and Seong-Woon Yu1,2*
1Department of Brain and Cognitive Sciences, 2Neurometabolomics Research Center, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Korea
Correspondence to: *To whom correspondence should be addressed.
TEL: 82-53-785-6113, FAX: 82-53-785-6109
Translocator protein 18 kDa (TSPO) is a mitochondrial protein highly expressed on reactive microglia and astrocytes, and is considered as a biomarker for neurodegeneration and brain damage, especially neuroinflammation. Toll-like receptors (TLRs) are closely related with inflammatory responses of microglia and astrocytes and these signaling pathways regulate neuroinflammation. Previous reports have identified the anti-inflammatory effects of TSPO ligands, however study of their effects in relation to the TLR signaling was limited. Here, we investigated the effects of five representative TSPO ligands on microglia and astrocytes following activation by various TLR ligands. Our results show that TSPO ligands reduce the pro-inflammatory response elicited by the TLR ligands with more profound effects on microglia than astrocytes.
Keywords: TSPO, TSPO ligands, Toll-like receptors, microglia, astrocyte