[No authors listed]
In the present study, we describe the status of somatostatin receptor 2 and 5 and as well as cannabinoid type 1 receptor (CB1R) in Huntingtin (Htt) knock-in striatal neuronal cells. In mutant Htt (mHtt) knock-in (STHdhQ111/111) and wild type (STHdhQ7/7) striatal neuronal cells, and CB1R exhibit prominent cytoplasmic expression and respond to agonist in a receptor specific manner. In response to quinolinic acid (QUIN)-induced toxicity, STHdhQ111/111â¯cells are more vulnerable and display suppressed cell survival signaling pathways. Receptor-specific agonists protect cells from QUIN-induced toxicity and activate ERK1/2 in both STHdh cells. Co-activation of duanyu1942Rs and CB1R resulted in loss of protective effects, delayed ERK1/2 phosphorylation and altered receptor complex composition. These results provide firsthand evidence in support of the protective role of duanyu1942Rs in STHdh cells and the possible crosstalk between duanyu1942Rs and CB1R in the modulation of excitotoxicity in Huntington's disease.
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