Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/33093
Title: Lanthanum induces extracellular signal-regulated kinase phosphorylation through different mechanisms in HeLa cells and NIH 3T3 cells
Authors: Hu, J
Yu, S
Yang, X
Wang, K
Qian, Z
Keywords: Calcium
Extracellular signal-regulated kinase
Lanthanum
Phosphorylation
Issue Date: 2006
Publisher: Springer
Source: Biometals, 2006, v. 19, no. 1, p. 13-18 How to cite?
Journal: Biometals 
Abstract: Lanthanum ion (La3+) was generally regarded as calcium antagonist and was used as calcium channel blocker. However, its potential biological effects on cells were poorly understood. In the present work, it was found that La3+ could induce rapid extracellular signal-regulated kinase (ERK) phosphorylation in both HeLa cells and NIH 3T3 cells, but different mechanisms were involved. At a concentration of 30μM or higher, La 3+ enters the cells and activates ERK through a mechanism involving calmodulin activation inside the cells, which is similar to the action of intracellular Ca2+. However, at lower concentration, free La 3+ promoted ERK phosphorylation in NIH 3T3 cells outside the cells through an unknown La3+ sensing mechanism, while Ca2+ exerted much weaker effect. The present results suggested that the biological effects of La3+ on cells maybe involve mechanisms beyond calcium antagonist.
URI: http://hdl.handle.net/10397/33093
ISSN: 0966-0844
EISSN: 1572-8773
DOI: 10.1007/s10534-005-3182-3
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