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To elucidate factors responsible for altered proliferation of preneoplastic hepatocytes in rat hepatocarcinogenesis in vivo, EGF-stimulated DNA synthesis of normal and nodular hepatocytes in primary culture was studied. In addition, the influence of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) was investigated to clarify whether this potent tumor promoter differentially affects normal and nodular hepatocyte...
Among the polychlorinated biphenyls (PCBs), a family of widespread environmental pollutants, the most toxic non-ortho-substituted coplanar (non-ortho coplanar) congeners are thought to act as strong dioxin (aryl hydrocarbon) receptor agonists leading to adverse effects, such as body weight loss, immunosuppression, thymic atrophy, hepatotoxicity, tumor promotion, and disturbances of steroid hormone...
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