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Basic and Clinical Neuroscience، جلد ۱۲، شماره ۶، صفحات ۷۶۷-۷۷۶
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| عنوان فارسی |
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| چکیده فارسی مقاله |
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| کلیدواژه‌های فارسی مقاله |
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| عنوان انگلیسی |
The Influence of Striatal Astrocyte Dysfunction on Locomotor Activity in Dopamine-depleted Rats |
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| چکیده انگلیسی مقاله |
Introduction: Astrocyte dysfunction is the common pathology failing astrocyte-neuron interaction in neurological diseases, including Parkinson's Disease (PD). The present study aimed to evaluate the impacts of astrocytic dysfunction caused by striatal injections of selective glial toxin L-Aminoadipic Acid (L-AA) on the rats' locomotor activity in normal conditions and under alpha-methyl-p-tyrosine depletion of catecholamines synthesis. Methods: Thirty-three male Wistar rats were used in the experiments. Intrastriatal L-AA injections (100 µg) were performed into the right striatum. Alpha-methyl-p-tyrosine (a-MT, 100 mg/kg, inhibitor of tyrosine hydroxylase) was intraperitoneally injected for catecholamine depletion. The animals were divided into 5 groups, as follows: 1. L-AA treated (n=7), 2. L-AA+a-MT treated (n=5), 3. Sham-operated (n=7), 4. Sham+a-MT treated (n=5), 5. Intact control (n=9). For assessing motor function, open field and beam walking tests were used on the third day after the operation. Neuronal and astrocyte markers (glial fibrillary acidic protein, glutamine synthetase, tyrosine hydroxylase, & neuronal nuclear antigen) were examined in the striatum by immunohistochemistry. Results: Administrating L-AA led to astrocytic degeneration in the striatum. No neuronal death and disruption of dopaminergic terminals were detected. L-AA and a-MT-treated animals' distance traveled was significantly (P=0.047) shorter than the Sham-operated group injected with a-MT. In the walking beam test, the number of unilateral paw slippings was significantly (P< 0.01) higher in the L-AA-treated group than Sham-operated animals. Administrating a-MT alone and L-AA did not change rats' performance in walking beam tests. Conclusion: Astrocyte ablation in dopamine depleted striatum resulted in reduced motor activity and asymmetrical gait disturbances. These findings demonstrated the role of astroglia in motor function regulation in the nigrostriatal system and suggest the possible association of glial dysfunction with motor dysfunction in PD. |
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| کلیدواژه‌های انگلیسی مقاله |
Astrocyte, 2-Aminoadipic Acid, Alpha-methyltyrosine, Corpus striatum, Motor activity |
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| نویسندگان مقاله |
| Dmitry Voronkov
Research Center of Neurology, Moscow, Russia.
| Alla Stavrovskaya
Research Center of Neurology, Moscow, Russia.
| Artyom Olshanskiy
Research Center of Neurology, Moscow, Russia.
| Anastasia Guschina
Research Center of Neurology, Moscow, Russia.
| Rudolf Khudoerkov
Research Center of Neurology, Moscow, Russia.
| Sergey Illarioshkin
Research Center of Neurology, Moscow, Russia.
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| نشانی اینترنتی |
http://bcn.iums.ac.ir/browse.php?a_code=A-10-1923-1&slc_lang=en&sid=1 |
| فایل مقاله |
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| کد مقاله (doi) |
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| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
Behavioral Neuroscience |
| نوع مقاله منتشر شده |
Original |
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