Abstract:
:Histology, immunohistochemistry, and Western blotting were used to characterize the changes in morphology, distribution pattern, and marker protein expression of striatal interneurons in the transition zone of striatal injury induced by 3-NP. The 3-NP treatment in rats yielded movement, motor coordination, and cognitive dysfunction. The 3-NP-induced lesion core was unvaryingly in the dorsolateral striatum, with a transition zone of lesser damage around the lesion core, in which medium-sized neurons were significantly decreased in abundance, but larger neurons survived. In both the transition zone and the lesion core, many TUNEL-positive cells negative for the interneuron markers were detected, indicating widespread projection neuron death. Immunohistochemical staining for the four interneuron types (parvalbuminergic, cholinergic, calretinergic, and neuropeptide Y-neuronal nitric oxide synthase cocontaining) showed that few immunolabeled interneurons were observed in the lesion core, but interneuron perikarya showed no evident loss in the transition zone. Consistently with this, Western blotting showed that the five interneuron protein markers were significantly decreased in the striatum after 3-NP treatment. Transition-zone calretinergic and neuropeptide Y-neuronal nitric oxide synthase-cocontaining interneurons, however, possessed more processes and varicosities than normal. These results show that, although striatal interneurons survive in the transition zone after 3-NP-mediated striatal injury, they have enhanced marker protein levels in their processes.
journal_name
J Neurosci Resjournal_title
Journal of neuroscience researchauthors
Mu S,OuYang L,Liu B,Zhu Y,Li K,Zhan M,Liu Z,Jia Y,Lei W,Reiner Adoi
10.1002/jnr.22591subject
Has Abstractpub_date
2011-05-01 00:00:00pages
744-54issue
5eissn
0360-4012issn
1097-4547journal_volume
89pub_type
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