Kourtis N, Tavernarakis N
Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, Heraklion 71110, Crete, Greece.
Cell Death Differ. 2009 Jan;16(1):21-30. doi: 10.1038/cdd.2008.120. Epub 2008 Aug 22.
Autophagy evolved in unicellular eukaryotes as a means for surviving nutrient stress. During the course of evolution, as multicellular organisms developed specialized cell types and complex intracellular signalling networks, autophagy has been summoned to serve additional cellular functions. Numerous recent studies indicate that apart from its pro-survival role under nutrient limitation, autophagy also participates in cell death. However, the precise role of this catabolic process in dying cells is not fully understood. Although in certain situations autophagy has a protective function, in other types of cell death it actually contributes to cellular destruction. Simple model organisms ranging from the unicellular Saccharomyces cerevisiae to the soil amoeba Dictyostelium discoideum and the metazoans Caenorhabditis elegans and Drosophila melanogaster provide clearly defined cell death paradigms that can be used to dissect the involvement of autophagy in cell death, at the molecular level. In this review, we survey current research in simple organisms, linking autophagy to cell death and discuss the complex interplay between autophagy, cell survival and cell death.
自噬在单细胞真核生物中演化形成,作为应对营养应激的一种生存方式。在进化过程中,随着多细胞生物发展出特化的细胞类型和复杂的细胞内信号网络,自噬被调用以发挥其他细胞功能。最近的大量研究表明,除了在营养限制下具有促生存作用外,自噬还参与细胞死亡。然而,这一分解代谢过程在垂死细胞中的确切作用尚未完全明确。从单细胞酿酒酵母到土壤变形虫盘基网柄菌,再到后生动物秀丽隐杆线虫和黑腹果蝇等简单模式生物,提供了明确的细胞死亡范例,可用于在分子水平剖析自噬在细胞死亡中的参与情况。在本综述中,我们审视了简单生物中当前的研究,将自噬与细胞死亡联系起来,并讨论自噬、细胞存活和细胞死亡之间的复杂相互作用。
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