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Effect of Erythropoietin on the interaction of Concanavalin A with rat erythrocytes

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Abstract

Effect of Erythropoietin (Ep) on the interaction of Concanavalin A (Con A) with rat erythrocytes was studied using 125I-labelled Con A. Binding of Con A to erythrocytes was dependent on time and cell concentration. Starvation caused an elevation of the lectin binding capacity of red cells which again came down towards the normal level on Ep administration to starved rats. Binding of Con A to erythrocytes decreased linearly with increasing concentration of Ep. Specificity of binding was confirmed by inhibition studies with α-methyl-D-mannopyranoside (Me Man) Cells from the starved rats compared to those from normal and Ep treated animals were less prone to inhibition by this sugar analog. Positive cooperative binding of Con A to rat erythrocyte was observed at low concentration of Con A but was absent at higher lectin concentrations. Starvation caused an increase in the number of binding sites per cell which returned to normal level after Ep treatment. Under identical conditions, binding affinities were not much changed in these cells. Cells from the starved animals were more susceptible to agglutination compared to those from normal and Ep-treated rats. Microviscosity and cholesterol/phospholipid ratio of red cell membrane decreased in the starved animals which retraced its way back towards the normal level after Ep treatment.

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Authors and Affiliations

  1. Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, 700 032, Jadavpur, Calcutta, India

    Tuli Biswas, Munmun Chakraborty, Chayan K. Ganguly & Jharna Ghosal

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  1. Tuli Biswas
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  2. Munmun Chakraborty
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  3. Chayan K. Ganguly
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  4. Jharna Ghosal
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Biswas, T., Chakraborty, M., Ganguly, C.K. et al. Effect of Erythropoietin on the interaction of Concanavalin A with rat erythrocytes. Mol Cell Biochem 106, 109–116 (1991). https://doi.org/10.1007/BF00230176

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  • DOI: https://doi.org/10.1007/BF00230176

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