RT Journal Article T1 Pathogenic mechanisms involving the interplay between adipose tissue and auto-antibodies in rheumatoid arthritis. A1 Arias-de la Rosa, Ivan A1 Escudero-Contreras, Alejandro A1 Ruiz-Ponce, Miriam A1 Cuesta-Lopez, Laura A1 Roman-Rodriguez, Cristobal A1 Perez-Sanchez, Carlos A1 Ruiz-Limon, Patricia A1 Ruiz, Rocio Guzman A1 Leiva-Cepas, Fernando A1 Alcaide, Juan A1 Segui, Pedro A1 Plasencia, Chamaida A1 Martinez-Feito, Ana A1 Font, Pilar A1 Abalos, María C A1 Ortega, Rafaela A1 Malagon, Maria M A1 Tinahones, Francisco J A1 Collantes-Estevez, Eduardo A1 Lopez-Pedrera, Chary A1 Barbarroja, Nuria K1 Health sciences K1 Immunology K1 Rheumatology AB We aimed to evaluate the association between adipose tissue (AT) dysfunction, autoimmunity, and disease activity in rheumatoid arthritis (RA). A cross-sectional study including 150 RA patients and 50 healthy donors and longitudinal study with 122 RA patients treated with anti-tumor necrosis factor (TNF)-α, anti-interleukin 6 receptor (IL6R) or anti-CD20 therapies for 6 months were carried out. In vitro experiments with human AT and adipocyte and macrophage cell lines were performed. A collagen-induced arthritis mouse model was developed. The insulin resistance and the altered adipocytokine profile were associated with disease activity, the presence of anti-citrullinated proteins anti-bodies (ACPAs), and worse response to therapy in RA. AT in the context of arthritis is characterized by an inflammatory state alongside the infiltration of macrophages and B/plasmatic cells, where ACPAs can have a direct impact, inducing inflammation and insulin resistance in macrophages and promoting a defective adipocyte differentiation, partially restored by biologicals. PB Cell Press YR 2022 FD 2022-08-03 LK http://hdl.handle.net/10668/22278 UL http://hdl.handle.net/10668/22278 LA en NO Arias-de la Rosa I, Escudero-Contreras A, Ruiz-Ponce M, Cuesta-López L, Román-Rodríguez C, Pérez-Sánchez C, et al. Pathogenic mechanisms involving the interplay between adipose tissue and auto-antibodies in rheumatoid arthritis. iScience. 2022 Aug 6;25(9):104893 NO We thank all the patients for their kind participation in this study. This research was funded by grants from the Institute of Health Carlos III, ISCIII (PI17/01316, PI20/00079, PI21/005991, and RICOR-RD21/0002/0033), co-financed by the European Regional Development Fund (ERDF), a way to make Europe, Spain, MINECO (RyC-2017-23437), the Andalusian Foundation of Rheumatology (FAR) and Consejerı´a de Conocimiento, Investigación y Universidad, Junta de Andalucı´a (P20_01367). C.L.-P. was supported by a contract fromthe Junta de Andalucia (Nicolas Monardes program). J.A. was supported by a ‘‘PFIS’’ predoctoral contract (FI19/00177). P.R.L. was supported by a ‘‘Sara Borrell’’ postdoctoral contract (CD19/00216) from the ISCIIIMadrid (Spain), co-financed by the Fondo Europeo de Desarrollo Regional-FEDER. DS RISalud RD Apr 5, 2025