Abstract：
:Patients with Parkinson's disease develop motor disturbances often accompanied by peripheral autonomic dysfunctions, including gastrointestinal disorders, such as dysphagia, gastric stasis and constipation. While the mechanisms subserving enteric autonomic dysfunctions are not clearly understood, they may involve the enteric dopaminergic and/or nitrergic systems. In the present study, we demonstrate that rats with unilateral 6-hydroxydopamine lesion of nigrostriatal dopaminergic neurons develop a marked inhibition of propulsive activity compared to sham-operated controls, as indicated by a 60% reduction of daily fecal output at the 4th week of observation. Immunohistochemical data revealed that 6-hydroxydopamine treatment did not affect the total number of HuC/D-positive myenteric neurons in both the proximal and distal segments of ileum and colon. Conversely, in the distal ileum and proximal colon the number of nitrergic neurons was significantly reduced. These results suggest that a disturbed distal gut transit, reminiscent of constipation in the clinical setting, may occur as a consequence of a reduced propulsive motility, likely due to an impairment of a nitric oxide-mediated descending inhibition during peristalsis.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Blandini F,Balestra B,Levandis G,Cervio M,Greco R,Tassorelli C,Colucci M,Faniglione M,Bazzini E,Nappi G,Clavenzani P,Vigneri S,De Giorgio R,Tonini Mdoi
10.1016/j.neulet.2009.10.035subject
Has Abstractpub_date
2009-12-31 00:00:00pages
203-7issue
3eissn
0304-3940issn
1872-7972pii
S0304-3940(09)01355-Xjournal_volume
467pub_type
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journal_title：Neuroscience letters
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journal_title：Neuroscience letters
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journal_title：Neuroscience letters
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journal_title：Neuroscience letters
pub_type： 杂志文章
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journal_title：Neuroscience letters
pub_type： 杂志文章
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journal_title：Neuroscience letters
pub_type： 杂志文章
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