Claudia Colina

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We have previously demonstrated that rat cerebellar Type-1 astrocytes express a very active genistein sensitive Na(+)/Ca(2+) exchanger, which accounts for most of the total plasma membrane Ca(2+) fluxes and for the clearance of loads induced by physiological agonists. In this work, we have explored the mechanism by which the reverse Na(+)/Ca(2+) exchange is(More)
Throughout evolution, enzymes have adapted to perform in different environments. The Na(+)/K(+) pump, an enzyme crucial for maintaining ionic gradients across cell membranes, is strongly influenced by the ionic environment. In vertebrates, the pump sees much less external Na(+) (100-160 mM) than it does in osmoconformers such as squid (450 mM), which live(More)
There is no effective treatment for the prevalent chronic form of Chagas' disease in Latin America. Its causative agent, the protozoan parasite Trypanosoma cruzi, has an essential requirement for ergosterol, and ergosterol biosynthesis inhibitors, such as the antifungal drug posaconazole, have potent trypanocidal activity. The antiarrhythmic compound(More)
Because firing properties and metabolic rates vary widely, neurons require different transport rates from their Na(+)/K(+) pumps in order to maintain ion homeostasis. In this study we show that Na(+)/K(+) pump activity is tightly regulated by a novel process, RNA editing. Three codons within the squid Na(+)/K(+) ATPase gene can be recoded at the RNA level,(More)
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