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. 1978 Feb;22:37–41. doi: 10.1289/ehp.782237

General subcellular effects of lead, mercury, cadmium, and arsenic.

B A Fowler
PMCID: PMC1637139  PMID: 648490

Abstract

This working paper summarizes the known ultrastructural and biochemical effects of lead, mercury, cadmium, and arsenic on subcellular organelle systems following in vivo administration. Documented metal-induced alterations in nuclear, mitochondrial, microsomal, and lysosomal functions are discussed in relation to their potential impact on cellular responses to other environmental agents. Each of the above elements has been found to interfere with normal cellular replication and genetic processes. Mitochondrial swelling and depression of respiratory function are discussed in relation to known metal-specific perturbations of mitochondrial heme biosynthetic pathway enzymes. Inhibition of microsomal enzyme activities and protein synthesis by lead and mercury is compared to the apparent absence of such effects following arsenic or cadmium exposure. Lysosomal uptake of all the metals is documented, but biochemical alterations in these structures have been reported for only mercury and cadmium. It is concluded that these toxic metals are capable of interacting with, and biochemically altering major cellular systems at dose levels below those required to produce signs of overt metal toxicity. The impact of these effects on cellular response to other metals and xenobiotics in complex exposure situations is presently unknown, and further research is urgently needed in this area.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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