scholarly journals Allopregnanolone restores the tyrosine hydroxylase‐positive neurons and motor performance in a 6‐OHDA‐injected mouse model

2020 ◽  
Vol 26 (10) ◽  
pp. 1069-1082
Author(s):  
Zhi‐Chi Chen ◽  
Tong‐Tong Wang ◽  
Wei Bian ◽  
Xin Ye ◽  
Meng‐Yi Li ◽  
...  
PLoS ONE ◽  
2012 ◽  
Vol 7 (11) ◽  
pp. e50040 ◽  
Author(s):  
Samuel O. Adeosun ◽  
Xu Hou ◽  
Yun Jiao ◽  
Baoying Zheng ◽  
Sherry Henry ◽  
...  

2009 ◽  
Vol 25 (1) ◽  
pp. 25-39 ◽  
Author(s):  
CA Dodd ◽  
BG Klein

The pyrethroid insecticide permethrin and the organophosphate insecticide chlorpyrifos can experimentally produce Parkinson’s disease (PD)-associated changes in the dopaminergic nigrostriatal pathway, short of frank degeneration, although at doses considerably higher than from a likely environmental exposure. The ability of permethrin (200 mg/kg), chlorpyrifos (50 mg/kg), or combined permethrin + chlorpyrifos to facilitate nigrostriatal damage in the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) (30 mg/kg) C57BL/6 mouse model of PD was investigated in three separate experiments. Tyrosine hydroxylase (TH) and glial fibrillary acidic protein (GFAP) immunohistochemistry assessed nigrostriatal degeneration or nigrostriatal damage more subtle than frank degeneration. Four fields in the dorsolateral caudate-putamen were examined at two rostrocaudal locations. The dopaminergic neurotoxin MPTP decreased striatal TH immunopositive neuropil and increased GFAP immunopositive neuropil. Neither permethrin nor chlorpyrifos, alone or in combination, altered the effects of MPTP upon TH or GFAP immunostaining. Permethrin alone increased striatal GFAP immunopositive neuropil but not when combined with chlorpyrifos treatment. Therefore, combined administration of the two insecticides appeared to protect against an increase in a neuropathological indicator of striatal damage seen with permethrin treatment alone. Differences compared with analysis of entire striatum emphasize the value of varying the topographic focus used to assess nigrostriatal degeneration in studies of insecticides in PD.


Neuroscience ◽  
2019 ◽  
Vol 414 ◽  
pp. 8-27 ◽  
Author(s):  
Madeline J. Churchill ◽  
Mark A. Cantu ◽  
Ella A. Kasanga ◽  
Cindy Moore ◽  
Michael F. Salvatore ◽  
...  

2014 ◽  
Vol 566 ◽  
pp. 286-291 ◽  
Author(s):  
Orhan Tansel Korkmaz ◽  
Nurgul Aytan ◽  
Isabel Carreras ◽  
Ji-Kyung Choi ◽  
Neil W. Kowall ◽  
...  

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Cassandra Peoples ◽  
Victoria E. Shaw ◽  
Jonathan Stone ◽  
Glen Jeffery ◽  
Gary E. Baker ◽  
...  

We examined whether near-infrared light (NIr) treatment (photobiomodulation) saves dopaminergic amacrine cells of the retina in an acute and a chronic 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) mouse model of Parkinson disease. For the acute model, BALB/c mice had MPTP (100 mg/kg) or saline injections over 30 hours, followed by a six-day-survival period. For the chronic model, mice had MPTP (200 mg/kg) or saline injections over five weeks, followed by a three-week-survival period. NIr treatment was applied either at the same time (simultaneous series) or well after (posttreatment series) the MPTP insult. There were four groups within each series: Saline, Saline-NIr, MPTP, and MPTP-NIr. Retinae were processed for tyrosine hydroxylase (TH) immunochemistry, and cell number was analysed. In the MPTP groups, there was a significant reduction in TH+ cell number compared to the saline controls; this reduction was greater in the acute (~50%) compared to the chronic (~30%) cases. In the MPTP-NIr groups, there were significantly more TH+ cells than in the MPTP groups of both series (~30%). In summary, we showed that NIr treatment was able to both protect (simultaneous series) and rescue (posttreatment series) TH+ cells of the retina from parkinsonian insult.


2013 ◽  
Vol 1505 ◽  
pp. 61-67 ◽  
Author(s):  
Tina L. Beckett ◽  
Christa M. Studzinski ◽  
Jeffrey N. Keller ◽  
M. Paul Murphy ◽  
Dana M. Niedowicz

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