کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5548789 | 1556594 | 2017 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
In-vivo effects of knocking-down metabotropic glutamate receptor 5 in the SOD1G93A mouse model of amyotrophic lateral sclerosis
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب رفتاری
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چکیده انگلیسی
Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disorder due to loss of upper and lower motor neurons (MNs). The mechanisms of neuronal death are largely unknown, thus prejudicing the successful pharmacological treatment. One major cause for MN degeneration in ALS is represented by glutamate(Glu)-mediated excitotoxicity. We have previously reported that activation of Group I metabotropic Glu receptors (mGluR1 and mGluR5) at glutamatergic spinal cord nerve terminals produces abnormal Glu release in the widely studied SOD1G93A mouse model of ALS. We also demonstrated that halving mGluR1 expression in the SOD1G93A mouse had a positive impact on survival, disease onset, disease progression, and on a number of cellular and biochemical readouts of ALS. We generated here SOD1G93A mice with reduced expression of mGluR5 (SOD1G93AGrm5â/+) by crossing the SOD1G93A mutant mouse with the mGluR5 heterozigous Grm5â/+ mouse. SOD1G93AGrm5â/+ mice showed prolonged survival probability and delayed pathology onset. These effects were associated to enhanced number of preserved MNs, decreased astrocyte and microglia activation, reduced cytosolic free Ca2+ concentration, and regularization of abnormal Glu release in the spinal cord of SOD1G93AGrm5â/+ mice. Unexpectedly, only male SOD1G93AGrm5â/+ mice showed improved motor skills during disease progression vs. SOD1G93A mice, while SOD1G93AGrm5â/+ females did not. These results demonstrate that a lower constitutive level of mGluR5 has a significant positive impact in mice with ALS and support the idea that blocking Group I mGluRs may represent a potentially effective pharmacological approach to the disease.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuropharmacology - Volume 123, 1 September 2017, Pages 433-445
Journal: Neuropharmacology - Volume 123, 1 September 2017, Pages 433-445
نویسندگان
Tiziana Bonifacino, Luca Cattaneo, Elena Gallia, Aldamaria Puliti, Marcello Melone, Francesca Provenzano, Simone Bossi, Ilaria Musante, Cesare Usai, Fiorenzo Conti, Giambattista Bonanno, Marco Milanese,