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논문 기본 정보

자료유형
학술저널
저자정보
안희영 (KU-KIST Graduate School of Converging Science and Technology Korea University Seoul 02841 KoreaCent) 고우현 (Center for Cognition and Sociality Institute for Basic Science (IBS) Daejeon) 강승희 (Center for Cognition and Sociality Institute for Basic Science (IBS)) 남민호 (Brain Science Institute Korea Institute of Science and Technology (KIST) Seoul 02792 KoreaDepartmen) Lee C. Justin (Center for Cognition and Sociality Cognitive Glioscience Group Institute for Basic Science Daejeon)
저널정보
한국뇌신경과학회 Experimental Neurobiology Experimental Neurobiology Vol.30 No.3
발행연도
2021.1
수록면
213 - 221 (9page)

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Bestrophin-1 (Best1) is a GABA- and glutamate-permeable, Ca2+-activated Cl- channel, which is mainly expressed in astrocytes and localized at the microdomain or perisynaptic junction of the tripartite synapse. Distribution of Best1 is dramatically changed in pathological conditions such as Alzheimer’s disease. However, it is still unknown whether Best1 is located at the glutamatergic or GABAergic tripartite synapses. Here, we utilized the Lattice structured illumination microscopy (Lattice SIM) to visualize Best1 expression at the perisynaptic junctions of the tripartite synapses in CA1 of mouse hippocampus. We performed co-labeling with antibodies against 1) Best1 and vesicular glutamate transporter-2 (vGLUT2) or 2) Best1 and vesicular GABA transporter (vGAT) to measure the proximity of Best1-containing perisynapse to glutamatergic or GABAergic pre synapse, respectively. In addition, we examined two transgenic mouse lines of 1) APP/PS1 mouse showing high astrocytic MAOB activity and cy tosolic GABA and 2) MAOB-KO mouse showing low astrocytic GABA. Lattice SIM images were further processed by Imaris, which allowed 3D rendering and spot identification. We found that astrocytic Best1 was distributed closer to the glutamatergic synapses than GABAergic synapses in the wild-type mice. In APP/PS1 mice, Best1 distribution was significantly changed by moving away from the glutamatergic synapses while moving closer to the GABAergic synapses. On the contrary, in MAOB-KO mice, the Best1 distribution was dramatically changed by moving closer to the glutamatergic synapses and moving far away from the GABAergic synapses. Our findings propose that the proximity of Best1-containing perisyn apses to presynapses dynamically changes according to the level of astrocytic cytosolic GABA

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