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题名: Studies on the toxic effects of La(3+) to Tetrahymena thermophila by microcalorimetry
作者: Chen Xiaojuan1, 2, 3; Feng Weisong3; Yu Yuhe3; Wan Chengyan1, 2; Peng Jianhua1, 2
关键词: La(3+) ; Tetrahymena thermophila ; microcalorimetry ; thermogenic curves ; inhibition ; cell growth ; membrane fluidity
刊名: BIOLOGICAL TRACE ELEMENT RESEARCH
发表日期: 2008-06-01
DOI: 10.1007/s12011-008-8092-0
卷: 123, 期:1-3, 页:242-249
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Biochemistry & Molecular Biology ; Endocrinology & Metabolism
研究领域[WOS]: Biochemistry & Molecular Biology ; Endocrinology & Metabolism
英文摘要: The toxic effects of La(3+) on Tetrahymena thermophila have been studied by microcalorimetry at 28 degrees C. The metabolic rate constant (r) and peak time were linked to the concentration of La(3+). The changes of metabolic rate constant indicated that low-concentration La(3+) (0-75 mg/L) had no significant effects on the metabolism of Tetrahymena cells but high-concentration La(3+) (100-175 mg/L) could inhibit their metabolism. From the results obtained by cell counting and fluorescence depolarization measurements, the inhibition of metabolism resulted from the decrease in cell number and the reduction in cell membrane fluidity. According to the results, it is clear that the metabolic mechanism of Tetrahymena cells has been changed with the addition of high-concentration La(3+). In addition, microcalorimetry of Tetrahymena could be a sensible, easy-to-use, and convenient method for monitoring the potential effects of rare earth elements on cells and the freshwater ecosystem.
关键词[WOS]: MEMBRANE FLUIDITY ; CELLS ; PHOSPHATIDYLCHOLINE ; PYRIFORMIS ; GROWTH ; IONS
语种: 英语
WOS记录号: WOS:000256084000027
ISSN号: 0163-4984
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/27366
Appears in Collections:淡水生态学研究中心_期刊论文

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作者单位: 1.Minist Water Resources, Inst Hydroecol, Wuhan 430079, Peoples R China
2.Chinese Acad Sci, Inst Hydroecol, Wuhan 430079, Peoples R China
3.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
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