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Article Publish Status: FREE
Abstract Title:

Loganin Attenuates High Glucose-Induced Schwann Cells Pyroptosis by Inhibiting ROS Generation and NLRP3 Inflammasome Activation.

Abstract Source:

Cells. 2020 08 23 ;9(9). Epub 2020 Aug 23. PMID: 32842536

Abstract Author(s):

Yu-Chi Cheng, Li-Wen Chu, Jun-Yih Chen, Su-Ling Hsieh, Yu-Chin Chang, Zen-Kong Dai, Bin-Nan Wu

Article Affiliation:

Yu-Chi Cheng

Abstract:

Diabetic peripheral neuropathy (DPN) is caused by hyperglycemia, which induces oxidative stress and inflammatory responses that damage nerve tissue. Excessive generation of reactive oxygen species (ROS) and NOD-like receptor protein 3 (NLRP3) inflammasome activation trigger the inflammation and pyroptosis in diabetes. Schwann cell dysfunction further promotes DPN progression. Loganin has been shown to have antioxidant and anti-inflammatory neuroprotective activities. This study evaluated the neuroprotective effect of loganin on high-glucose (25 mM)-induced rat Schwann cell line RSC96 injury, a recognized in vitro cell model of DPN. RSC96 cells were pretreated with loganin (0.1, 1, 10, 25, 50μM) before exposure to high glucose. Loganin's effects were examined by CCK-8 assay, ROS assay, cell death assay, immunofluorescence staining, quantitative RT-PCR and western blot. High-glucose-treated RSC96 cells sustained cell viability loss, ROS generation, NF-κB nuclear translocation, P2 × 7purinergic receptor and TXNIP (thioredoxin-interacting protein) expression, NLRP3 inflammasome (NLRP3, ASC, caspase-1) activation, IL-1β and IL-18 maturation and gasdermin D cleavage. Those effects were reduced by loganin pretreatment. In conclusion, we found that loganin's antioxidant effects prevent RSC96 Schwann cell pyroptosis by inhibiting ROS generation and suppressing NLRP3 inflammasome activation.

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