Irreversible erythrocyte volume expansion induced by tellurite.

Abstract:

:Tellurite (K2TeO3) has been suggested as a potential anti-sickling compound because it causes a selective increase in the water content of RBC. To investigate the conditions underlying the increase in RBC volume due to tellurite, normal RBCs were incubated with the compound in a physiological medium and the cells washed with a 10-fold volume of the medium. The washed cells were then incubated at 24 degrees C for periods up to 4 h and the following parameters were determined: MCV, MCH, MCHC and supernatant haemoglobin concentration by standard methods, the density distribution profile by phthalate esters and cell morphology by scanning electron microscopy (SEM). The effect of hypertonic PBS on the tellurite-treated cells was also tested. K2TeO3 induced concentration and time dependent increases in MCV and decreases in MCHC without any apparent change in MCH. The median density and the transitional 60% density range of the cell distribution profile respectively decreased and increased in proportion to [K2TeO3] and time. Hypertonic PBS did not inhibit or reverse the tellurite-induced changes in MCV and MCHC. SEM and photovolumetric measurements demonstrated tellurite-induced large vesicles ranging in size from 24 to 32 micron 3. The proportion of these vesicles increased with time and K2TeO3 concentration. Since tellurite is an oxidant, these findings suggest that its influx into the red cell results in irreversible reactions that disrupt the ion and water regulatory properties of the membrane.

journal_name

Br J Haematol

authors

Kurantsin-Mills J,Klug RK,Lessin LS

doi

10.1111/j.1365-2141.1988.tb02496.x

subject

Has Abstract

pub_date

1988-11-01 00:00:00

pages

369-74

issue

3

eissn

0007-1048

issn

1365-2141

journal_volume

70

pub_type

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