Abstract：
:Our recent work shows that in addition to pumping ions, Na/K-ATPase acts as a signal transducer. Binding of ouabain to Na/K-ATPase changes the interaction of the enzyme with neighboring membrane proteins and induces the formation of multiple signaling modules, resulting in activation of Src, transactivation of the EGF receptor (EGFR), and increased production of reactive oxygen species (ROS). Interaction of these signals leads to activation of several other cascades, including p42/44 and p38 MAPKs, phospholipase C, and protein kinase C isozymes, in a cell-specific manner. Ouabain also increases [Ca(2+)](i) and contractility, induces some of the early-response protooncogenes, and activates transcription factors AP-1 and NF-kappaB. Interplay among these pathways eventually results in changes in the expression of a number of growth-related genes and in cell growth. Significantly, inhibition of Src blocked many of the aforementioned ouabain-activated signaling pathways. Furthermore, Src binds to Na/K-ATPase directly and ouabain regulates the interaction between Src and the enzyme, resulting in Src activation. To address the possibility that the signaling Na/K-ATPase is concentrated in a separate pool on the plasma membrane, we have assessed interaction of the enzyme with caveolins. These studies indicated that Na/K-ATPase was concentrated in caveolae/rafts. In addition, caveolin-1 can be co-immunoprecipitated with Na/K-ATPase. Finally, we have shown that the signaling function of the enzyme is also pivotal to ouabain-induced nongenomic effects on cardiac myocytes.
journal_name
Ann N Y Acad Scijournal_title
Annals of the New York Academy of Sciencesauthors
Xie Zdoi
10.1111/j.1749-6632.2003.tb07234.xsubject
Has Abstractpub_date
2003-04-01 00:00:00pages
497-503eissn
0077-8923issn
1749-6632journal_volume
986pub_type
杂志文章,评审abstract：:Atrial fibrillation (AF), the highest occurring cardiac arrhythmia in the Western world, is associated with substantial morbidity and increased mortality. In spite of extensive research, the cause of atrial electrical remodeling, a major factor in the self-perpetuating nature of AF, is still unknown. Downregulation of...
journal_title：Annals of the New York Academy of Sciences
pub_type： 杂志文章
doi：10.1111/j.1749-6632.2009.05087.x
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abstract：:A generation of research in cognitive psychology has given rise to many tasks that tap at various aspects of attention. It is now widely agreed that attention is not a single thing and that its measurement needs a strategy to study each of its various aspects. While there is no widely agreed taxonomy of attentional op...
journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
pub_type： 杂志文章
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journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
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更新日期：2002-12-01 00:00:00
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journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
pub_type： 杂志文章
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更新日期：2009-03-01 00:00:00
abstract：:Birds, the most species-rich monophyletic group of land vertebrates, have been subject to some of the most intense sequencing efforts to date, making them an ideal case study for recent developments in genomics research. Here, we review how our understanding of bird genomes has changed with the recent sequencing of mo...
journal_title：Annals of the New York Academy of Sciences
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更新日期：2017-02-01 00:00:00
abstract：:Until now, neoadjuvant therapy plus surgical resection of the primary tumor and potential metastatic lymph nodes (LNs) has been the current optimal treatment for locally advanced thoracic esophageal cancer (EC). LN metastasis is one of the most negative prognostic factors for thoracic esophageal squamous cell carcinom...
journal_title：Annals of the New York Academy of Sciences
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更新日期：2020-12-01 00:00:00
abstract：:Violence against women has been a problem in human cultures for centuries. This is still the case both in developed and in developing countries, but it is in developing countries where the problem is aggravated as the result of cultural norms that are tolerant of men exerting power over women and girls as a commonly a...
journal_title：Annals of the New York Academy of Sciences
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更新日期：2006-11-01 00:00:00
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journal_title：Annals of the New York Academy of Sciences
pub_type： 杂志文章
doi：10.1111/j.1749-6632.1975.tb51092.x
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abstract：:For more than 10 years umbilical cord blood (UCB) has been used as an alternative source of hematopoietic stem cells for allogeneic transplantation. Although the clinical results are encouraging, UCB is associated with delayed engraftment. To address these issues we have used the NOD/SCID mouse model to study the engr...
journal_title：Annals of the New York Academy of Sciences
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更新日期：2001-06-01 00:00:00
abstract：:Propagation and prolongation of rapid neuronal discharge underlies the epilepsies. However, episodic focal rapid neuronal discharges limited to discrete nuclei and pathways of the amygdala-hippocampal-septal-hypothalamic networks are the language of physiologic message systems for endocrine regulation and reproductive...
journal_title：Annals of the New York Academy of Sciences
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更新日期：1999-06-29 00:00:00
