Cadmium chloride (CdCl2) added to human lymphocyte culture inhibits the proliferative response induced by phytohaemagglutinin (PHA), pokeweed mitogen and allogenic lymphocytes in mixed lymphocyte reaction. Minimally effective concentrations of CdCl2 were 3.3, 1.6 and 1.6 microM, respectively. The inhibition was greatest when CdCl2 was added at initiation of cultures and declined if the addition of CdCl2 was postponed. The presence of CdCl2, regardless of the presence of PHA during the first 24 h of incubation suppressed the proliferative response to subsequent stimulation with PHA, indicating that cadmium affects an early step of blastogenic transformation.
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Kaštelan et al. (2008) studied this question.
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