200 124

Cited 0 times in

Regulation of microglial immune function by store-operated calcium channels

DC FieldValueLanguage
dc.descriptionDept. of Medical Science/석사-
dc.description.abstractMicroglia is the immune effector cell in central nervous system (CNS) that participates in tissue repair, inflammatory responses and neuronal degeneration. Microglia differentiates into active state which shows not only morphology but increased chemotaxis response, phagocytosis capacity, and cytokine release1. Most important signaling in differentiation of immune cell is sustained calcium increase in cytosol which is maintained by SOCE (Store Operated Calcium Entry). Recently, molecular identity of SOC (Store Operated Channel) has revealed that Orais (Orai 1, 2, 3) and STIMs (STIM1, 2) constitute SOC. Orais are the calcium channel which show high selectivity to Ca2+, and STIMs are the sensor of stored calcium in the ER (Endoplasmic Reticulum) membrane3. In this study, we demonstrate that SOC mediated by Orai1 and STIM1, not by TRPCs influences the immune function of microglia, especially IL-6 cytokine secretion. In this study, primary microglia cells from neonatal mouse brain were used, which show 99.8% purity with glial fibrillary acidic protein (GFAP) immune-staining. Primary microglia has Orai 1, 2, 3, and STIM1, but not any TRPCs and STIM2. To identify the role of SOC in microglia immune functions, microglia was treated with siRNA Orai1 and STIM1, and then was measured for phagocytosis activity and cytokine secretion by ELISA (Enzyme-linked Immunosorbent Assay). Microglial phagocytosis activity was not affected by knock down of Orai1 and STIM1 in both UDP treated and untreated microglial cell. In ELISA assay, TNF-α secretion was not siginificantly affected by knock-down of Orai1 and STIM1, however IL-6 secretion was dramatically decreased by siRNA Orai1 and STIM1 treatment. To evaluate the SOC effect on the upstream signaling in immune function, phosphorylation of IκB signaling was measured in STIM1 knock down condition. These results indicate that SOC constituted by Orai1 and STIM1 influences the immune fuction governed by chronic calcium increase, but not transient increase, in microglia.-
dc.publisherGraduate School, Yonsei University-
dc.rightsCC BY-NC-ND 2.0 KR-
dc.titleRegulation of microglial immune function by store-operated calcium channels-
dc.title.alternative미세아교세포 면역 기능 조절에 있어서 세포 내 칼슘 저장량의 의존적으로 작동하는 칼슘 이온 통로의 역할-
dc.contributor.alternativeNameHeo, Dae Keon-
Appears in Collections:
1. College of Medicine (의과대학) > Others (기타) > 2. Thesis


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.