CD38 promotes pristane-induced chronic inflammation and increases susceptibility to experimental lupus by an apoptosis-driven and TRPM2-dependent mechanism.
Sonia García-RodríguezAntonio Rosal-VelaDavide BottaLuz M Cumba GarciaEsther ZumaqueroVerónica Prados-ManiviesaDaniela Cerezo-WallisNicola Lo BuonoJosé-Ángel Robles-GuiradoSalvador GuerreroElena González-ParedesEduardo Andrés LeónÁngel CorbíMatthias MackFriedrich Koch-NolteRamón MerinoMercedes ZubiaurFrances E LundJaime SanchoPublished in: Scientific reports (2018)
In this study, we investigated the role of CD38 in a pristane-induced murine model of lupus. CD38-deficient (Cd38-/-) but not ART2-deficient (Art2-/-) mice developed less severe lupus compared to wild type (WT) mice, and their protective phenotype consisted of (i) decreased IFN-I-stimulated gene expression, (ii) decreased numbers of peritoneal CCR2hiLy6Chi inflammatory monocytes, TNF-α-producing Ly6G+ neutrophils and Ly6Clo monocytes/macrophages, (iii) decreased production of anti-single-stranded DNA and anti-nRNP autoantibodies, and (iv) ameliorated glomerulonephritis. Cd38-/- pristane-elicited peritoneal exudate cells had defective CCL2 and TNF-α secretion following TLR7 stimulation. However, Tnf-α and Cxcl12 gene expression in Cd38-/- bone marrow (BM) cells was intact, suggesting a CD38-independent TLR7/TNF-α/CXCL12 axis in the BM. Chemotactic responses of Cd38-/- Ly6Chi monocytes and Ly6G+ neutrophils were not impaired. However, Cd38-/- Ly6Chi monocytes and Ly6Clo monocytes/macrophages had defective apoptosis-mediated cell death. Importantly, mice lacking the cation channel TRPM2 (Trpm2-/-) exhibited very similar protection, with decreased numbers of PECs, and apoptotic Ly6Chi monocytes and Ly6Clo monocytes/macrophages compared to WT mice. These findings reveal a new role for CD38 in promoting aberrant inflammation and lupus-like autoimmunity via an apoptosis-driven mechanism. Furthermore, given the implications of CD38 in the activation of TRPM2, our data suggest that CD38 modulation of pristane-induced apoptosis is TRPM2-dependent.
Keyphrases
- induced apoptosis
- cell death
- gene expression
- oxidative stress
- cell cycle arrest
- endoplasmic reticulum stress
- systemic lupus erythematosus
- dendritic cells
- bone marrow
- nk cells
- rheumatoid arthritis
- wild type
- inflammatory response
- disease activity
- metabolic syndrome
- mesenchymal stem cells
- signaling pathway
- hiv infected
- early onset
- cell proliferation
- drug induced
- machine learning
- antiretroviral therapy
- electronic health record
- regulatory t cells
- binding protein
- high speed
- circulating tumor
- nuclear factor