TRAIL, DR4 and DR5 Are Upregulated in Kidneys from Patients with Lupus Nephritis and Exert Proliferative and Proinflammatory Effects
Overview
Authors
Affiliations
We have previously reported that TRAIL is upregulated on T cells from patients with lupus and that T cell associated TRAIL enhances autoimmune parameters in a murine model of lupus. Whether TRAIL/TRAIL-R interaction plays a role in organ involvement such as lupus nephritis has not yet been assessed. We demonstrate here that TRAIL, DR4 and DR5 are upregulated in proximal and distal tubules of patients with proliferative lupus nephritis. In vitro, expression of TRAIL, DR4 and DR5 on primary proximal tubular epithelial cells (PTEC) was induced by TNFalpha and IFNgamma. Functionally, TRAIL did not induce apoptosis but rather enhanced the proliferation of PTEC through activation of PI3 kinase/AKT and ERK1/2, increased IL-8 production and upregulated ICAM-1 expression. These data demonstrate that cytokine induced upregulation of TRAIL, DR4 and DR5 in tubules from patients with proliferative lupus nephritis may play a protective role by enhancing PTEC survival while also exerting a proinflammatory effect that may contribute to local inflammation and injury.
Zhang S, Hu W, Tang Y, Chen X PLoS One. 2025; 20(1):e0318280.
PMID: 39869603 PMC: 11771862. DOI: 10.1371/journal.pone.0318280.
TNF-Related Apoptosis-Inducing Ligand: Non-Apoptotic Signalling.
Guerrache A, Micheau O Cells. 2024; 13(6.
PMID: 38534365 PMC: 10968836. DOI: 10.3390/cells13060521.
Dong J, Zheng F, Liu F, He J, Li S, Pu W Front Immunol. 2023; 14:1131164.
PMID: 37033921 PMC: 10077062. DOI: 10.3389/fimmu.2023.1131164.
Defining the Role of Monocytes in Sjögren's Syndrome.
Sequi-Sabater J, Beretta L Int J Mol Sci. 2022; 23(21).
PMID: 36361554 PMC: 9654893. DOI: 10.3390/ijms232112765.
The Genetic Landscape of Cutaneous Lupus Erythematosus.
Chen H, Barber G, Chong B Front Med (Lausanne). 2022; 9:916011.
PMID: 35721085 PMC: 9201079. DOI: 10.3389/fmed.2022.916011.