The document discusses the role of anti-DNA IgG in the pathogenesis of cutaneous lupus erythematosus (CLE). It describes experiments examining the interaction of anti-DNA IgG with keratinocytes and its effects. Skin tissue samples from CLE patients and healthy controls were obtained and anti-DNA IgG clones were cultured. Experiments found that anti-DNA IgG binds to keratinocytes and induces apoptosis. It also binds to novel antigens like collagen III and SOCS1. This binding may amplify TWEAK/Fn14 signals and modulate SOCS1, contributing to macrophage chemoattraction and skin lesions in CLE. The document aims to better understand the pathogenic effects of anti-DNA IgG in C