Environmental estrogens can affect the function of mussel hemocytes through rapid modulation of kinase pathways

General and Comparative Endocrinology
Laura CanesiGabriella Gallo

Abstract

Estrogens and estrogenic chemicals can affect several vertebrate non-reproductive functions, the immune response in particular. We have previously shown that in the hemocytes of the marine mollusc Mytilus the natural estrogen 17beta-estradiol (E(2)) can affect the immune function through rapid tyrosine kinase-mediated signalling pathways converging on phosphorylation of both mitogen activated protein kinases (MAPKs) and signal transducers and activators of transcription (STATs), whose activation plays a key role in the immune response. In this work the effects of synthetic estrogens (such as DES), estrogenic chemicals (such as Bisphenol A, Nonylphenol), and plant estrogens (genistein) on mussel hemocytes were evaluated. The results demonstrate that all the EDCs tested exert in vitro effects similar to those of E(2) on lysosomal membrane stability, although at concentrations 1000 times higher than those of the natural estrogen. When the effects of DES, BPA, and NP on tyrosine kinase-mediated cell signalling were investigated, estrogenic compounds showed distinct effects on the phosphorylation state of MAPK and STAT members. In particular, only DES, like E(2), induced p38 MAPK phosphorylation, whereas BPA and NP seem to have oppo...Continue Reading

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