Cell-cell communication induces random spikes of spontaneous calcium oscillations in multi-BV-2 microglial cells.
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 Ca 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.
The Key Laboratory of Weak-Light Nonlinear Photonics, Ministry of Education, School of Physics and TEDA Applied Physics School, Nankai University, Tianjin 300457, PR China.
Xian
X
Wu
Leiting
L
Pan
Ying
Y
Liu
Pengchong
P
Jiang
Imshik
I
Lee
Irena
I
Drevensek-Olenik
Xinzheng
X
Zhang
Jingjun
J
Xu
D000818:Animals; D020013:Calcium Signaling; D002450:Cell Communication; D002460:Cell Line; D051379:Mice; D017628:Microglia / Q000166:cytology / Q000378:metabolism / Q000502:physiology*