Abstract：
:Considerable evidence has demonstrated that women are more vulnerable than men to the toxic effects of alcohol, although the results as to whether gender differences exist in ethanol-induced brain damage are contradictory. We have reported that ethanol, by activating the neuroimmune system and Toll-like receptors 4 (TLR4), can cause neuroinflammation and brain injury. However, whether there are gender differences in alcohol-induced neuroinflammation and brain injury are currently controversial. Using the brains of TLR4(+/+) and TLR4(-/-) (TLR4-KO) mice, we report that chronic ethanol treatment induces inflammatory mediators (iNOS and COX-2), cytokines (IL-1β, TNF-α), gliosis processes, caspase-3 activation and neuronal loss in the cerebral cortex of both female and male mice. Conversely, the levels of these parameters tend to be higher in female than in male mice. Using an in vivo imaging technique, our results further evidence that ethanol treatment triggers higher GFAP levels and lower MAP-2 levels in female than in male mice, suggesting a greater effect of ethanol-induced astrogliosis and less MAP-2(+) neurons in female than in male mice. Our results further confirm the pivotal role of TLR4 in alcohol-induced neuroinflammation and brain damage since the elimination of TLR4 protects the brain of males and females against the deleterious effects of ethanol. In short, the present findings demonstrate that, during the same period of ethanol treatment, females are more vulnerable than males to the neurotoxic/neuroinflammatory effects of ethanol, thus supporting the view that women are more susceptible than men to the medical consequences of alcohol abuse.
journal_name
Toxicologyjournal_title
Toxicologyauthors
Alfonso-Loeches S,Pascual M,Guerri Cdoi
10.1016/j.tox.2013.03.001subject
Has Abstractpub_date
2013-09-06 00:00:00pages
27-34issue
1-2eissn
0300-483Xissn
1879-3185pii
S0300-483X(13)00063-2journal_volume
311pub_type
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