Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
<mark>Journal publication date</mark> | 15/01/2013 |
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<mark>Journal</mark> | Respiratory physiology & neurobiology |
Issue number | 2 |
Volume | 185 |
Number of pages | 5 |
Pages (from-to) | 217-221 |
Publication Status | Published |
Early online date | 30/10/12 |
<mark>Original language</mark> | English |
Rostral fluid displacement has been proposed as a pathophysiologic mechanism of both central and obstructive sleep apnea. Aquaporins are membrane proteins that regulate water transport across the cell membrane and are involved in brain edema formation and resolution. The present study investigated the effect of intermittent hypoxia (IH), a model of sleep apnea, on brain aquaporins. Mice were exposed to intermittent hypoxia to a nadir of 7% oxygen fraction. Brain water content, Aquaporin-1 and Aquaporin-3 were measured in the cerebellum and hippocampus. Hematoxylin-eosin and immunohistochemistry stainings were performed to evaluate cell damage. Compared to the sham group, the hypoxia group presented higher brain water content, lower levels of Aquaporin-1 and similar levels of Aquaporin-3. Immunoreactivity to GFAP and S100B was stronger in the hypoxia group in areas of extensive gliosis, compatible with cytotoxic edema. These findings, although preliminary, indicate an effect of IH on aquaporins levels. Further investigation about the relevance of these data on the pathophysiology of OSA is warranted.