Calcium-dependent mitochondrial extrusion in ciliated protozoa.

Calcium-dependent mitochondrial extrusion in ciliated protozoa.
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DOI:
10.1016/j.mito.2011.08.001
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发表时间:
2011-11
期刊:
影响因子:
4.4
通讯作者:
Clark, Theodore G.
Clark, Theodore G.
中科院分区:
生物学3区
文献类型:
--
作者:
Bisharyan, Yelena;Clark, Theodore G.

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Here we demonstrate that ciliated protozoa can jettison mitochondria as intact organelles, releasing their contents to the extracellular space either in a soluble form, or in association with membrane vesicles at the cell periphery. The response is triggered by lateral clustering of GPI-anchored surface antigens, or by heat shock. In the first instance, extrusion is accompanied by elevated levels of intracellular calcium and is inhibited by Verapamil and BAPTA-AM arguing strongly for the involvement of calcium in triggering the response. Cells survive mitochondrial discharge raising the interesting possibility that extrusion is an early evolutionary adaptation to cell stress.
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