Cell-cell communication induces random spikes of spontaneous calcium oscillations in multi-BV-2 microglial cells

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• 作者：Xian Wu ; Leiting Pan ; ^{plt@nankai.edu.cn} ; Ying Liu ; Pengchong Jiang ; Imshik Lee ; Irena Drevensek-Olenik ; Xinzheng Zhang ; Jingjun Xu
• 关键词：Spontaneous calcium oscillations ; Cell&ndash ; cell communication ; Random spikes ; BV-2 microglial cells
• 刊名：Biochemical and Biophysical Research Communications
• 出版年：2013
• 出版时间：22 February, 2013
• 年：2013
• 卷：431
• 期：4
• 页码：664-669
• 全文大小：721 K

文摘

As the first and main form of active immune defense in the central nervous system, microglial cells usually exhibit complicated intracellular calcium (Ca²⁺) activity that can regulate the downstream components of signaling cascades. In the present work, spontaneous oscillations of the cytosolic calcium concentration ([Ca²⁺]_c) in multi-BV-2 microglial cells were observed by video microscopy. These cells exhibited random spikes of Ca²⁺ oscillations. Cross-correlation analysis of the temporal dependence of the oscillations indicated the existence of cell-cell communication mediated by extracellular messengers. Numerical simulations based on a simple mathematical model suggested that these communications could induce random spikes of spontaneous Ca²⁺ oscillations in the multi-cell system. Short-time imaging analysis of random spikes in different regions of a single cell showed that spontaneous Ca²⁺ oscillations resulted from Ca²⁺ wave generated by other cells as well as from calcium elevation inside the cell. Taken together, our data demonstrate that cell-cell communication existed between the BV-2 microglial cells in vitro and further resulted in the random spikes of spontaneous Ca²⁺ oscillations.