Skin inflammation and photosensitivity are common in lupus erythematosus (LE) patients, and ultraviolet (UV) light is a known trigger of skin and possibly systemic inflammation in systemic lupus erythematosus (SLE) and discoid lupus erythematosus (DLE) patients. Type I interferons (IFN) are upregulated in LE skin after UV exposure; however, the mechanisms to explain UVB-induced inflammation remain unclear. Here, we demonstrated that UVB irradiation-induced activation of human endogenous retroviruses (HERVs) plays a major role in the immune response. UVB-induced HERV-associated dsRNA transcription and subsequent activation of the innate antiviral RIG-I/MDA5/IRF7 pathway led to downstream transcription of interferon-stimulated genes, which promotes UVB-induced apoptosis and proliferation inhibition in keratinocytes through RIG-I and MDA5 pathways. Our findings indicate that UVB irradiation induces HERV-dsRNA overexpression, and the dsRNA-sensing innate immunity pathway promotes type I IFN production, which may be a potential mechanism of skin inflammatory response and skin lesion of SLE/DLE.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/exd.14568 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Quantification of Citrullinated Histone H3 as a Marker for Neutrophil Extracellular Traps Correlated to Clinical Characteristics of Patients with Systemic Lupus Erythematosus.
Arch Immunol Ther Exp (Warsz)
January 2025
Department of Human Physiology, Medical University of Lublin, Lublin, Poland.
Systemic lupus erythematosus (SLE) is an autoimmune disease whose pathogenesis is not fully understood to date. One of the suggested mechanisms for its development is NETosis, which involves the release of a specific network consisting of chromatin, proteins, and enzymes from neutrophils, stimulating the immune system. One of its markers is citrullinated histone H3 (H3Cit).
View Article and Find Full Text PDFEarly neutrophil activation and NETs release in the pristane-induced lupus mice model.
PLoS One
January 2025
Laboratório de Imunologia Celular (LIM-17), Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil.
Background: NETosis is recognized as an important source of autoantigens. Therefore, we hypothesized whether the pristane-induced lupus mice model shows early activation of neutrophils, the presence of low-density granulocytes (LDGs), and neutrophil extracellular traps (NETs) release, which could contribute to the development of a lupus phenotype.
Methods: Twelve female wild-type Balb/c mice were intraperitoneally injected with pristane (n = 6; pristane group) or saline (n = 6; control group).
Discriminative features of immunoglobulin G4-related disease (IgG4-RD) and associated autoimmune rheumatic diseases (ARDs) in a nationwide observational cohort: study from the Egyptian College of Rheumatology.
Clin Rheumatol
January 2025
Rheumatology Department, Faculty of Medicine, Cairo University, Cairo, Egypt.
Objective: The objective of this study is to present the clinical characteristics of immunoglobulin G4-related diseases (IgG4-RD) patients and describe associated overlap with autoimmune rheumatic diseases (ARDs).
Patients And Methods: This cross-sectional study included 81 patients with IgG4-RD who were recruited from 13 specialized rheumatology departments and centers across the country in collaboration with the Egyptian College of Rheumatology (ECR). Patients underwent a thorough history-taking and clinical examination.
Basic Science and Pathogenesis.
Alzheimers Dement
December 2024
School of Biomedical Informatics, The University of Texas Health Science Center at Houston, Houston, TX, USA.
Background: An increasing body of evidence has suggested that the pathogenesis of Alzheimer's disease (AD) is not confined to the neurons but instead that neuroinflammation plays a significant role in the disease, with an interplay between the brain and the immune system. So far, their shared genetic components have not been systematically studied.
Method: We investigated the shared genetic architecture between AD and a plethora of immune-mediated diseases using the genome-wide association studies (GWAS) summary statistics data: allergic rhinitis, asthma, atopic dermatitis, celiac disease, Crohn's disease, hypothyroidism, primary sclerosing cholangitis, RA, systemic lupus erythematosus, ulcerative colitis, and vitiligo.
Urinary congophilia as a predictive biomarker of lupus nephritis in pregnant and non-pregnant women with systemic lupus erythematosus.
Lupus
January 2025
Mansoura Nephrology and Dialysis Unit, Mansoura University, Mansoura, Egypt.
Background: Endoplasmic reticulum stress with protein misfolding has been introduced as a key pathogenetic mechanism in lupus nephritis (LN). Pregnancy is thought to exaggerate proteostasis, which leads to the accumulation of potentially pathogenic misfolded proteins in the urine, serum, and placenta particularly in women with preeclampsia. The detection of misfolded proteins is made using Congo red stain, which is referred to as congophilia.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!