Abstract:
:Recently, we reported a profound depletion of cardiac sympathetic nerve fibers in Parkinson's disease (PD). This cardiac sympathetic denervation is a characteristic hallmark of PD. Cardiac sympathetic dysfunction was also observed in 1-methyl-4-phenyl-1,2,3,6-tetrahydroxypyridine (MPTP)-treated mice, a model of PD. Although binding assay showed a decreased density of norepinephrine transporter (NET) in the hearts of the mice, their histopathological alterations have not been demonstrated. In this study, we investigated hearts of MPTP-treated mice with immunohistochemical method and Western blot analyses. MPTP-treated mice showed significant decreases in the contents of cardiac noradrenaline and dopamine, suggesting the sympathetic dysfunction. Synaptophysin-, tyrosine hydroxylase- or NET-immunoreactive nerve fibers were abundant in the hearts of control mice and MPTP-treated mice, without apparent differences between the two groups. Western blot analyses also showed no difference in the amounts of these proteins. Myocardial nerve fibers were well preserved in MPTP-treated mice, despite apparent cardiac sympathetic dysfunction.
journal_name
Neurosci Resjournal_title
Neuroscience researchauthors
Amino T,Uchihara T,Tsunekawa H,Takahata K,Shimazu S,Mizusawa H,Orimo Sdoi
10.1016/j.neures.2007.11.011subject
Has Abstractpub_date
2008-03-01 00:00:00pages
314-8issue
3eissn
0168-0102issn
1872-8111pii
S0168-0102(07)01852-4journal_volume
60pub_type
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