Abstract:
INTRODUCTION:Resveratrol has been reported to alleviate inflammatory responses and oxidative stress in mesangial cells and in several types of renal injury in animal models. Previously, the active resveratrol derivatives from the roots of Vitis thunbergii Sieb. & Zucc. (Vitaceae) were shown to have significant anti-platelet and anti-oxidative activities. However, the anti-inflammatory mechanisms of these resveratrol derivatives in rat mesangial cells (RMCs) have not been clarified fully. METHODS:The protective mechanisms of resveratrol derivatives involved in tumor necrosis factor-α (TNF-α)-induced inflammatory responses were assessed by Western blot analysis, real-time PCR, and RT-PCR. The involvement of various signaling molecules in these responses was investigated using selective pharmacological inhibitors. RESULTS:Nontoxic concentrations of the resveratrol derivatives significantly attenuated cytosolic phospholipase A2 (cPLA2) and cyclooxygenase 2 (COX-2) expression in RMCs challenged by TNF-α. These resveratrol derivatives inhibited TNF-α-activated ERK1/2 and JNK1/2 without affecting p38 phosphorylation. Next, we demonstrated that TNF-α induced NF-κB activation, translocation, and promoter activity, which was inhibited by pretreatment with resveratrol derivatives in RMCs. CONCLUSION:The protective mechanisms of resveratrol derivatives against TNF-α-stimulated inflammatory responses via cPLA2/COX-2/PGE2 inhibition was caused by the attenuation of the JNK1/2, ERK1/2, and NF-κB signaling pathways in RMCs.
journal_name
Cytokinejournal_title
Cytokineauthors
Lee IT,Lin CF,Huang YL,Chong KY,Hsieh MF,Huang TH,Cheng CYdoi
10.1016/j.cyto.2018.10.008subject
Has Abstractpub_date
2019-01-01 00:00:00pages
380-392eissn
1043-4666issn
1096-0023pii
S1043-4666(18)30396-Xjournal_volume
113pub_type
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