Abstract
We investigated the role of IL-1alpha and IL-1beta expressed in the reactive gliosis following hippocampal damage induced by trimethyltin (TMT). IL-1alpha immunoreactivity was expressed earlier in small glial cells on day 4 post-TMT, while IL-1beta expression was obvious in large swollen glial cells on day 14 post-TMT. Both IL-1alpha and IL-1beta immunoreactivities were double-labeled with astrocyte marker, vimentin, but not with a microglia marker, OX-42. The expression of both IL-1alpha/beta was enhanced by adrenalectomy (ADX) prior to TMT administration. Corticosterone (CORT) or dexamethasone (DEX) supplementation not only cancelled effects of ADX, but also partially reversed TMT-induced enhancement of IL-1alpha/beta expressions. These changes coincided with TMT-induced neuronal death in CA3 pyramidal cells of the hippocampus. It is suggested that IL-1alpha/beta expressed in reactive astrocytes participate in TMT neurotoxicity via type II glucocorticoid receptors.
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Sep 25, 2012·Toxicology·Jiangfei ChenQiaoxiang Dong
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