کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
3057478 | 1186599 | 2006 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Minocycline or iNOS inhibition block 3-nitrotyrosine increases and blood–brain barrier leakiness in amyloid beta-peptide-injected rat hippocampus Minocycline or iNOS inhibition block 3-nitrotyrosine increases and blood–brain barrier leakiness in amyloid beta-peptide-injected rat hippocampus](/preview/png/3057478.png)
This work has examined levels of 3-nitrotyrosine (3-NT, a marker for peroxynitrite formation) and intactness of blood–brain barrier (BBB) in amyloid beta-peptide (Aβ1–42)-injected rat hippocampus. Immunohistochemical analysis demonstrated 3-NT immunoreactivity in microglia/macrophages and astrocytes were significantly increased at 7 days post-Aβ1–42 injection. Administration of the broad spectrum anti-inflammatory agent minocycline or the selective iNOS inhibitor 1400W markedly reduced 3-NT levels. Double immunofluorescence staining showed that 3-NT was prominently expressed in microglia/macrophages and astrocytes located in proximity to blood vessels. Additionally, Aβ1–42 injection caused a marked increase in permeability of the BBB to immunoglobulin G (IgG); both minocycline and 1400W were highly effective in decreasing the leakiness of the BBB. Our results suggest the involvement of glial-derived reactive nitrogen species in mediating increased BBB permeability in Aβ1–42 injected rat hippocampus.
Journal: Experimental Neurology - Volume 198, Issue 2, April 2006, Pages 552–557