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Maloley PM, England BR, Sayles HR, Thiele GM, Duryee MJ, Hunter CD, Payne JB, Mikuls TR. Performance of a commercially available multiplex platform in the assessment of circulating cytokines and chemokines in patients with rheumatoid arthritis and osteoarthritis. J Immunol Methods 2021; 495:113048. [PMID: 33933473 DOI: 10.1016/j.jim.2021.113048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 03/02/2021] [Accepted: 03/23/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND/OBJECTIVE Cytokines and chemokines (cytokines) are central to rheumatoid arthritis (RA) pathogenesis, with increasing use of multiplex immunoassays in clinical/research settings. Rheumatoid factor (RF) may interfere with assay outcomes by nonspecifically binding detection analytes. We evaluated the performance of a commercially available multiplex platform, including assessment of the impact of RF depletion. METHODS Forty-five cytokines were tested using Meso Scale Discovery V-PLEX™ and samples from 40 RA and 40 osteoarthritis (OA) patients. Select samples were depleted of RF using a commercial binder. Performance was assessed using intra-assay coefficients of variation (CV), intraclass correlation coefficients (ICC), percent change following RF depletion, and disease discrimination. Values above or below quantification thresholds were imputed. RESULTS Of the 45 cytokines analyzed, 31 yielded CVs <10%; none demonstrated CVs >30%. ICCs universally exceeded 0.85 with the exception of eight analytes. RF depletion altered cytokine values by <15% for 40 analytes with larger changes (>30%) only seen for one analyte. Twenty-three cytokines differed significantly based on measurement in plasma vs. serum. Three analytes were higher in the serum of RA vs. OA (IL-10, IP-10, TNFα), and none were significantly greater in OA vs. RA. Seventeen analytes required imputation for >50% of the samples tested, primarily related to concentrations below the lower limit of quantification threshold. CONCLUSION The results from this commercially available multiplex assay were generally highly reproducible and interference induced by RF only meaningfully impacted the quantification of five of the analytes examined.
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Affiliation(s)
- Peter M Maloley
- University of Nebraska Medical Center (UNMC) Department of Internal Medicine, Division of Rheumatology, Omaha, NE, United States of America
| | - Bryant R England
- University of Nebraska Medical Center (UNMC) Department of Internal Medicine, Division of Rheumatology, Omaha, NE, United States of America; Veterans Affairs (VA) Nebraska-Western Iowa Health Care System, Omaha, NE, United States of America
| | - Harlan R Sayles
- UNMC College of Public Health, Omaha, NE, United States of America
| | - Geoffrey M Thiele
- University of Nebraska Medical Center (UNMC) Department of Internal Medicine, Division of Rheumatology, Omaha, NE, United States of America; Veterans Affairs (VA) Nebraska-Western Iowa Health Care System, Omaha, NE, United States of America
| | - Michael J Duryee
- University of Nebraska Medical Center (UNMC) Department of Internal Medicine, Division of Rheumatology, Omaha, NE, United States of America; Veterans Affairs (VA) Nebraska-Western Iowa Health Care System, Omaha, NE, United States of America
| | - Carlos D Hunter
- University of Nebraska Medical Center (UNMC) Department of Internal Medicine, Division of Rheumatology, Omaha, NE, United States of America; Veterans Affairs (VA) Nebraska-Western Iowa Health Care System, Omaha, NE, United States of America
| | - Jeffrey B Payne
- University of Nebraska Medical Center (UNMC) Department of Internal Medicine, Division of Rheumatology, Omaha, NE, United States of America; UNMC College of Dentistry, Lincoln, NE, United States of America
| | - Ted R Mikuls
- University of Nebraska Medical Center (UNMC) Department of Internal Medicine, Division of Rheumatology, Omaha, NE, United States of America; Veterans Affairs (VA) Nebraska-Western Iowa Health Care System, Omaha, NE, United States of America.
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Maloley PM, England BR, Sayles H, Thiele GM, Michaud K, Sokolove J, Cannon GW, Reimold AM, Kerr GS, Baker JF, Caplan L, Case AJ, Mikuls TR. Post-traumatic stress disorder and serum cytokine and chemokine concentrations in patients with rheumatoid arthritis ✰. Semin Arthritis Rheum 2019; 49:229-235. [PMID: 30777365 DOI: 10.1016/j.semarthrit.2019.02.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 12/27/2018] [Accepted: 02/03/2019] [Indexed: 01/20/2023]
Abstract
OBJECTIVE Although post-traumatic stress disorder (PTSD) is identified as a risk factor in the development of rheumatoid arthritis (RA), associations of PTSD with disease progression are less clear. To explore whether PTSD might influence disease-related measures of systemic inflammation in RA, we compared serum cytokine/chemokine (cytokine) concentrations in RA patients with and without PTSD. METHODS Participants were U.S. Veterans with RA and were categorized as having PTSD, other forms of depression/anxiety, or neither based on administrative diagnostic codes. Multiplex cytokines were measured using banked serum. Associations of PTSD with cytokine parameters (including a weighted cytokine score) were assessed using multivariable regression, stratified by anti-CCP status and adjusted for age, sex, race, and smoking status. RESULTS Among 1,460 RA subjects with mean (SD) age of 64 (11) years and disease duration of 11 (11) years, 91% were male, 77% anti-CCP positive, and 80% ever smokers. Of these, 11.6% had PTSD, 23.7% other depression/anxiety, and 64.7% had neither. PTSD, but not depression/anxiety, was associated with a higher cytokine score and number of high-concentration analytes in adjusted models, though this was limited to anti-CCP positive subjects. PTSD was associated with heightened expression of several individual cytokines including IL-1β, IL-2, IL-4, IL-5, IL-6, IL-7, IL-10, IL-12, IL-17, IFN-γ, GM-CSF, MCP-1, and TNF-α. CONCLUSION Anti-CCP positive RA patients with PTSD have higher serum cytokine concentrations than those without PTSD, demonstrating that systemic inflammation characteristic of RA is heightened in the context of this relatively common psychiatric comorbidity.
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Affiliation(s)
- P M Maloley
- Veterans Affairs (VA) Nebraska-Western Iowa Health Care System, Omaha, NE, United States; University of Nebraska Medical Center, Omaha, NE, United States
| | - B R England
- Veterans Affairs (VA) Nebraska-Western Iowa Health Care System, Omaha, NE, United States; University of Nebraska Medical Center, Omaha, NE, United States
| | - H Sayles
- University of Nebraska Medical Center, Omaha, NE, United States
| | - G M Thiele
- Veterans Affairs (VA) Nebraska-Western Iowa Health Care System, Omaha, NE, United States; University of Nebraska Medical Center, Omaha, NE, United States
| | - K Michaud
- University of Nebraska Medical Center, Omaha, NE, United States; National Data Bank for Rheumatic Diseases, Wichita, KS, United States
| | - J Sokolove
- AbbVie, Redwood City, CA, United States; VA Palo Alto Health Care System and Stanford University School of Medicine, Palo Alto, CA, United States
| | - G W Cannon
- Salt Lake City VA and the University of Utah, Salt Lake City, UT, United States
| | - A M Reimold
- Dallas VA and the University of Texas Southwestern, Dallas, TX, United States
| | - G S Kerr
- Washington, DC VA, Georgetown and Howard Universities, Washington, DC, United States
| | - J F Baker
- Philadelphia VA and the University of Pennsylvania, Philadelphia, PA, United States
| | - L Caplan
- Denver VA and the University of Colorado at Denver, Denver, CO, United States
| | - A J Case
- University of Nebraska Medical Center, Omaha, NE, United States
| | - T R Mikuls
- Veterans Affairs (VA) Nebraska-Western Iowa Health Care System, Omaha, NE, United States; University of Nebraska Medical Center, Omaha, NE, United States.
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