bioRxiv preprint doi: https://doi.org/10.1101/2020.06.19.123307; this version posted June 21, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. Analysis of Gene Expression from Systemic Lupus Erythematosus Synovium Reveals a Profile of Activated Immune Cells and Inflammatory Pathways Erika L. Hubbarda,*, Michelle D. Catalinaa,b, Sarah Heuera,c, Prathyusha Bachalia, Robert Robla, Nicholas S. Geracia,d, Amrie C. Grammera,#, Peter E. Lipskya,# aRILITE Research Institute and AMPEL BioSolutions LLC; 250 West Main Street Suite #300 Charlottesville, VA 22902, USA. *Address correspondence to
[email protected]; 250 West Main Street Suite 300, Charlottesville, VA 22902, USA. bPresent address: EMD Serono Research & Development Institute, 45 A Middlesex Turnpike Billerica, MA 01821 cPresent address: The Jackson Laboratory, Tufts Graduate School of Biomedical Sciences, 600 Main Street Bar Harbor, ME 04609, USA dPresent address: Profiler Business Unit, Genedata Inc, 1 Cranberry Hill, Lexington, MA 02421, USA #Contributed equally to this work 1 bioRxiv preprint doi: https://doi.org/10.1101/2020.06.19.123307; this version posted June 21, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. ABSTRACT Arthritis is a common manifestation of systemic lupus erythematosus (SLE) yet understanding of the underlying pathogenic mechanisms remains incomplete. We, therefore, interrogated gene expression profiles of SLE synovium to gain insight into the nature of lupus arthritis (LA), using osteoarthritis (OA) and rheumatoid arthritis (RA) as comparators.