文章基本信息

标题：Suppression of calcium-dependent membrane currents in human fibroblasts by replicative senescence and forced expression of a gene sequence encoding a putative calcium-binding protein
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作者：S Liu ; R Thweatt ; C K Lumpkin 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1994
卷号：91
期号：6
页码：2186-2190
DOI：10.1073/pnas.91.6.2186
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Human diploid fibroblasts (HDFs) possess Ca(2+)-dependent membrane currents. These currents were suppressed in late-passage normal (senescent) HDFs and prematurely senescent HDFs derived from a subject with Werner syndrome (WS), compared with early-passage normal (young) HDFs. When young HDFs were microinjected with mRNA transcribed in vitro from a cDNA (WS3-10) which encodes a protein bearing a putative Ca(2+)-binding site and whose endogenous gene is overexpressed in senescent and WS HDFs, membrane currents fell to levels present in senescent and WS HDFs. Thus, both replicative senescence and forced expression of the WS3-10 gene sequence lead to suppression of Ca(2+)-dependent membrane currents, which suggests that a causal connection exists between these two processes.