alexa Influence of aqueous crude extracts of medicinal plants on the osmotic stability of human erythrocytes.


Journal of Membrane Science & Technology

Author(s): de Freitas MV, Netto Rde C, da Costa Huss JC, de Souza TM, Costa JO,

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Abstract This work analyzed the effects of the aqueous crude extracts of Artemisia absinthium L., Lippia sp., Bryophyllum sp., Solidago microglossa DC, Cymbopogon citratus DC and Mentha x villosa HUDSON on the osmotic stability of human erythrocytes. Hemolysis was monitored by measurement of absorbance at 540 nm following addition of erythrocytes to NaCl solutions of varying concentration. Absorbance was fitted to sigmoid regression curves given by the Boltzmann equation, and hemolysis was characterized by the NaCl concentration leading to lysis of 50\% of cells (H(50)), and by the intensity (H) and the amplitude (dS) of the lysis effect. The parameters were determined in the absence and presence of the crude extracts. The extracts of Artemisia absinthium, Lippia sp., C. citratus and M. villosa protected human erythrocytes against hypotonic shock, as evidenced by a decrease in the values of H and H(50) compared to the control solution (p<0.05). The extracts of Bryophyllum sp. and S. microglossa enhanced hemolysis, since their H(50) values were higher than in the control group (p<0.05), but they also showed protective effects, as evidenced by a decrease in H and an increase in dS. This article was published in Toxicol In Vitro and referenced in Journal of Membrane Science & Technology

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