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Article . 2009
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Evaluación de la interacción hemoglobina-membrana durante la polimerización de la hemoglobina S

Authors: Falcón Dieguez, J.E.; Rodi, Pablo Marcelo; Lores Guevara, M.A.; Gennaro, Ana Maria;

Evaluación de la interacción hemoglobina-membrana durante la polimerización de la hemoglobina S

Abstract

En la anemia drepanocítica ha sido previamente documentada una anormal interacción hemoglobina-membrana. Sin embargo, no se conoce cómo se modifica ésta durante el proceso de polimerización de la hemoglobina S. En este trabajo empleamos un modelo de eritrocitos reconstituidos a partir de membranas fantasmas cuyas proteínas del citoesqueleto se marcaron con el marcador de espín 4-maleimido Tempo y posteriormente se resellaron con hemoglobina S o hemoglobina A. Estudiamos la variación temporal del parámetro espectral W/S, indicativo del estado conformacional de las proteínas del citoesqueleto, principalmente de la espectrina, a fin de detectar los eventuales efectos debidos al proceso de polimerización por desoxigenación espontánea. Las diferencias observadas en los comportamientos de la variación temporal de W/S en eritrocitos reconstituidos con ambas hemoglobinas fueron consideradas como evidencia experimental de un incremento de la interacción hemoglobina S-membrana como resultado del proceso de polimerización de la hemoglobina S bajo condiciones de desoxigenación espontánea.

An enhanced hemoglobin-membrane association has been previously documented in the sickle cell disease. However, it is not known how this interaction is modified during the hemoglobin S polymerization process. In this work, we use a model of reconstituted erythrocytes from ghost membranes whose cytoskeleton proteins were labelled with the 4-maleimido Tempo spin label, and that were subsequently resealed with haemoglobin S or A. We studied the time dependence of the spectral W/S parameter, indicative of the conformational state of cytoskeleton proteins (mainly spectrin), with the aim of detecting the eventual effects due to hemoglobin S polymerization. The differences observed in the temporal behavior of W/S in erythrocytes reconstituted with both hemoglobins were considered as experimental evidence of an increment in hemoglobin S-membrane interaction, as a result of the hemoglobin S polymerization process under spontaneous deoxygenation.

Fil: Rodi, Pablo Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina

Fil: Gennaro, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina

Fil: Falcón Dieguez, J.E.. Universidad de Oriente; Cuba

Fil: Lores Guevara, M.A.. Universidad de Oriente; Cuba

Country
Argentina
Keywords

Polimerización Hemoglobina S, https://purl.org/becyt/ford/1.6, Eritrocitos Reconstituidos, Hemoglobina-Membrana, https://purl.org/becyt/ford/1, 4-Maleimido Tempo

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green