IRBP651-670(Interphotoreceptor retinoid-binding protein (651-670))是IRBP(亦称为retinoid-binding protein 3)的肽段,参与色素再生,通过将视黄醇和视黄醛从光感受细胞传输到视网膜色素上皮。在C57BL 6小鼠中,利用IRBP651-670诱导自身免疫性葡萄膜炎,这些小鼠携带H-2b单体型。用IRBP651-670(300 µg 动物)免疫增加了小鼠眼部IL-1β、IL-6、IL-17、TNF-α和IFN-γ水平,免疫细胞浸润及光感受器损伤。
Protein conjugates in tissue regeneration 3 (PCTR3) is a specialized pro-resolving mediator (SPM) synthesized from docosahexaenoic acid . DHA is oxidized to 16S,17S-epoxy-protectin, which is converted to PCTR1 by glutathione S-transferase and to PCTR2 and PCTR3 via peptidases. PCTR3 is found in infected mouse spleens and resolving exudate as well as isolated human spleen and septic plasma. It is also found in both M1 and M2 macrophages differentiated from isolated human monocytes.