Candida albicans, a distinctive fungal model for cellular aging study.

Candida albicans, a distinctive fungal model for cellular aging study.
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白色念珠菌,细胞衰老研究的独特真菌模型

DOI:
10.1111/j.1474-9726.2008.00424.x
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发表时间:
2008-10
期刊:
影响因子:
7.8
通讯作者:
Zhou JQ
Zhou JQ
中科院分区:
生物学1区
文献类型:
--
作者:
Fu XH;Meng FL;Hu Y;Zhou JQ

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单细胞真核生物代表了理解真核生物衰老的流行模型系统。白色念珠菌是一种多态性真菌,似乎是除了芽殖酵母酿酒酵母和裂殖酵母粟酒裂殖酵母之外的另一种独特的单细胞衰老模型。两种类型的念珠菌细胞,酵母(胚芽孢子)形式和菌丝(丝状)形式,具有相似的复制寿命。利用形态变化,我们能够获得不同年龄的细胞。老念珠菌细胞倾向于积累糖原和氧化损伤的蛋白质。删除 SIR2 基因会导致寿命缩短,而插入额外的 SIR2 副本则会延长寿命,这表明与酿酒酵母一样,Sir2 可以调节白色念珠菌的细胞衰老。有趣的是,Sir2缺失不会导致染色体外rDNA分子的积累,但会影响母细胞中氧化蛋白的保留,这表明染色体外rDNA分子可能与白色念珠菌的细胞衰老无关。这种新颖的衰老模型可以有效地大规模分离旧细胞,可以促进细胞衰老的生化表征和基因组学/蛋白质组学研究,并有助于验证在包括酿酒酵母在内的其他生物体中观察到的衰老途径。
The unicellular eukaryotic organisms represent the popular model systems to understand aging in eukaryotes. Candida albicans, a polymorphic fungus, appears to be another distinctive unicellular aging model in addition to the budding yeast Saccharomyces cerevisiae and fission yeast Schizosaccharomyces pombe. The two types of Candida cells, yeast (blastospore) form and hyphal (filamentous) form, have similar replicative lifespan. Taking the advantage of morphologic changes, we are able to obtain cells of different ages. Old Candida cells tend to accumulate glycogen and oxidatively damaged proteins. Deletion of the SIR2 gene causes a decrease of lifespan, while insertion of an extra copy of SIR2 extends lifespan, indicating that like in S. cerevisiae, Sir2 regulates cellular aging in C. albicans. Interestingly, Sir2 deletion does not result in the accumulation of extra‐chromosomal rDNA molecules, but influences the retention of oxidized proteins in mother cells, suggesting that the extra‐chromosomal rDNA molecules may not be associated with cellular aging in C. albicans. This novel aging model, which allows efficient large‐scale isolation of old cells, may facilitate biochemical characterizations and genomics/proteomics studies of cellular aging, and help to verify the aging pathways observed in other organisms including S. cerevisiae.
DOI: 10.1016/s1097-2765(00)80472-4
发表时间: 1999-04-01
期刊: MOLECULAR CELL
影响因子: 16
作者:
Defossez, PA;Prusty, R;Guarente, L
通讯作者: Guarente, L
DOI: 10.1128/mcb.22.22.8056-8066.2002
发表时间: 2002-11-01
影响因子: 5.3
作者:
Kaeberlein, M;Andalis, AA;Guarente, L
通讯作者: Guarente, L
DOI: 10.1101/gad.13.19.2570
发表时间: 1999-10-01
影响因子: 10.5
作者:
Kaeberlein, M;McVey, M;Guarente, L
通讯作者: Guarente, L
DOI: 10.1371/journal.pbio.0020296
发表时间: 2004-09
期刊: PLoS biology
影响因子: 9.8
作者:
Kaeberlein M;Kirkland KT;Fields S;Kennedy BK
通讯作者: Kennedy BK
DOI: 10.1093/geronj/45.1.b9
发表时间: 1990-01-01
期刊: JOURNALS OF GERONTOLOGY
影响因子: --
作者:
EGILMEZ, NK;CHEN, JB;JAZWINSKI, SM
通讯作者: JAZWINSKI, SM