ISSN:
1573-4935
Keywords:
lymphocytes
;
blastogenesis
;
chromic acid
;
periodic acid
;
membrane oxidation
;
sialic acid
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
Notes:
Abstract Blastogenic and cytotoxic effects of hexavalent chromium were evaluated by direct, 2 and 20 min oxidation of lymphocytes by 10.0 to 0.0005 mM CrO3 at 0°C. Oxidized cells exhibited concentration-dependent cytotoxicity and the inhibition of tritiated thymidine incorporation rates. When lymphocytes were oxidized first by 1.0 mM periodic acid (H5IO6) and thereafter by 1.0 mM CrO3, the viability and [3H]-TdR incorporation rates of sequentially oxidized cells were identical to the corresponding indicators of lymphocytes oxidized only by CrO3. The reversal of the oxidation sequence restored [3H]-TdR incorporation to control levels and increased cell survival. It is therefore concluded that direct interaction of hexavalent CrO3 with plasma membrane of lymphocytes results in concentration-dependent cytotoxicity and the inhibition of [3H]-TdR incorporation, but it does not induce blastogenesis.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01117234
