Protective effect of 1, 25(OH)_2D_3 on Aβ_(1-42)-induced pyrolysis in PC12 cells

Abstract

To investigate the protective effect of 1, 25(OH)_2D_3 on Aβ_(1-42)-induced pyrolysis in PC12 cells. The Alzheimer& apos; s disease model in PC12 cells was established with 20 μmol/L Aβ_(1-42). The experiment was divided into control group, model group(20 μmol/L Aβ_(1-42)) and 1, 25(OH)_2D_3 groups(1, 10, 100 nmol/L 1, 25(OH)_2D_3+20 μmol/L Aβ_(1-42)). Cell activity was detected by CCK-8, cell membrane permeability was detected by AO/EB staining, lactic dehydrogenase(LDH)and interleukin-1β(IL-1β)were detected by colorimetry and ELISA, NOD-like receptor family protein 1(NLRP1), cysteinyl aspartate specific proteinase-1(caspase-1)and gasdermin D(GSDMD)protein expression were detected by Western Blot. Compared with the control group, the cell activitywas significantly decreased(P& lt; 0. 01), cell membrane permeability, the level of LDH and IL-1β, and the expression of NLRP1, caspase-1 and GSDMD were significantly increased(P& lt; 0. 01). Compared with the model group, the cell activity was significantly increased(P& lt; 0. 01), cell membrane damage was decreased in PC12 cells exposed to 1, 25(OH)_2D_3. The level of LDH and IL-1β were significantly decreased(P& lt; 0. 01) in PC12 cells exposed to 10 and 100 nmol/L 1, 25(OH)_2D_3. The expression of NLRP1 and GSDMD in 1 nmol/L 1, 25(OH)_2D_3 group was decreased(P& lt; 0. 05), and the decrease was more significant in 10 and 100 nmol/L 1, 25(OH)_2D_3 groups(P& lt; 0. 01). The expression of caspase-1 was significantly decreased in 10 and 100 nmol/L 1, 25(OH)_2D_3 groups(P& lt; 0. 05, P& lt; 0. 01). 1, 25(OH)_2D_3 exerts a significant protective effect against Aβ_(1-42)-induced PC12 cells injury through inhibition of neuronal pyrolysis.