title: CD11c as a transcriptional biomarker to predict response to anti-TNF monotherapy with adalimumab in patients with rheumatoid arthritis.
abstract: We performed transcription profiling using monocytes to identify predictive markers of response to anti-tumor necrosis factor (anti-TNF) therapy in patients with rheumatoid arthritis (RA). Several potential predictors of response were identified, including CD11c. Validation in samples from independent cohorts (total of n = 27 patients) using reverse transcription-PCR confirmed increased expression of CD11c in responders to adalimumab (100% sensitivity; 91.7% specificity, power 99.6%; alpha = 0.01). Pretherapy CD11c levels significantly correlated with the response criteria as defined by the American College of Rheumatology (ACR) (r = 0.656, P < 0.0001). However, CD11c was neither predictive of response to methotrexate (MTX) alone (n = 34) nor to MTX in combination with adalimumab (n = 16). Clinical responders revealed a reset to a normal expression pattern of resident/inflammatory monocyte markers, which was absent in nonresponders. Therefore, an analysis of key cell types identifies potentially predictive biomarkers that may help to restrict the use of adalimumab to therapy responders. Larger studies, including studies of monotherapy with other drugs, are now needed to confirm and validate the specificity of CD11c for anti-TNF biologics.
authors.affiliation: Department of Rheumatology and Clinical Immunology, Charité University Hospital, Humboldt University of Berlin, Berlin, Germany. bruno.stuhlmueller@charite.de
authors.forename: B
authors.initials: B
authors.lastname: Stuhlmüller
authors.forename: T
authors.initials: T
authors.lastname: Häupl
authors.forename: M M
authors.initials: MM
authors.lastname: Hernandez
authors.forename: A
authors.initials: A
authors.lastname: Grützkau
authors.forename: R-J
authors.initials: RJ
authors.lastname: Kuban
authors.forename: N
authors.initials: N
authors.lastname: Tandon
authors.forename: J W
authors.initials: JW
authors.lastname: Voss
authors.forename: J
authors.initials: J
authors.lastname: Salfeld
authors.forename: R W
authors.initials: RW
authors.lastname: Kinne
authors.forename: G R
authors.initials: GR
authors.lastname: Burmester
mesh_terms: D000068879:Adalimumab; D000328:Adult; D000368:Aged; D000911:Antibodies, Monoclonal / Q000097:blood* / Q000502:physiology / Q000627:therapeutic use; D061067:Antibodies, Monoclonal, Humanized; D018501:Antirheumatic Agents / Q000097:blood* / Q000494:pharmacology / Q000627:therapeutic use; D001172:Arthritis, Rheumatoid / Q000097:blood* / Q000188:drug therapy / Q000235:genetics; D015415:Biomarkers / Q000097:blood; D039521:CD11c Antigen / Q000097:blood* / Q000235:genetics*; D015331:Cohort Studies; D005260:Female; D005819:Genetic Markers / Q000235:genetics; D006801:Humans; D008297:Male; D008727:Methotrexate / Q000627:therapeutic use; D008875:Middle Aged; D009000:Monocytes / Q000187:drug effects / Q000378:metabolism; D011237:Predictive Value of Tests; D040081:Protein Array Analysis / Q000379:methods; D014158:Transcription, Genetic / Q000187:drug effects / Q000502:physiology*; D016896:Treatment Outcome; D014409:Tumor Necrosis Factor-alpha / Q000037:antagonists & inhibitors* / Q000276:immunology
chemical_list: D000911:Antibodies, Monoclonal; D061067:Antibodies, Monoclonal, Humanized; D018501:Antirheumatic Agents; D015415:Biomarkers; D039521:CD11c Antigen; D005819:Genetic Markers; D014409:Tumor Necrosis Factor-alpha; D000068879:Adalimumab; D008727:Methotrexate