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Antibodies to Malondialdehyde-Acetaldehyde Adduct Are Associated with Prevalent and Incident Rheumatoid Arthritis-Associated Interstitial Lung Disease in US Veterans



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  • Personal Author:
  • Description:
    Objective: The objective of this study is to determine the associations of protein-specific anti-malondialdehyde-acetaldehyde (MAA) antibodies with prevalent and incident rheumatoid arthritis-interstitial lung disease (RA-ILD). Methods: Within a multicenter, prospective cohort of US veterans with RA, RA-ILD was validated by medical record review of clinical diagnoses, chest imaging, and pathology. Serum antibodies to MAA-albumin, MAA-collagen, MAA-fibrinogen, and MAA-vimentin (IgA, IgM, and IgG) were measured by a standardized enzyme-linked immunosorbent assay. Associations of anti-MAA antibodies with prevalent and incident RA-ILD were assessed using multivariable regression models adjusting for established RA-ILD risk factors. Results: Among 2,739 participants with RA (88% male, mean age of 64 years), there were 114 with prevalent and 136 with incident RA-ILD (average time to diagnosis: 6.6 years). Higher IgM anti-MAA-collagen (per 1 SD: adjusted odds ratio [aOR] 1.28, 95% confidence interval [CI] 1.02-1.61), IgA anti-MAA-fibrinogen (aOR 1.48, 95% CI 1.14-1.92), and IgA (aOR 1.78, 95% CI 1.34-2.37) and IgG (aOR 1.48, 95% CI 1.14-1.92) anti-MAA-vimentin antibodies were associated with prevalent RA-ILD. In incident analyses, higher IgA (per one SD: adjusted hazards ratio [aHR] 1.40, 95% CI 1.11-1.76) and IgM (aHR 1.29, 95% CI 1.04-1.60) anti-MAA-albumin antibody concentrations were associated with increased ILD risk. Participants with IgA (aHR 2.13, 95% CI 1.16-3.90) or IgM (aHR 1.98, 95% CI 1.08-3.64) anti-MAA-albumin antibody concentrations in the highest quartile had an approximately two-fold increased risk of incident RA-ILD. Across all isotypes, anti-MAA-fibrinogen, anti-MAA-collagen, and anti-MAA-vimentin antibodies were not significantly associated with incident RA-ILD. Conclusion: Protein-specific anti-MAA antibodies to collagen, fibrinogen, and vimentin were associated with prevalent RA-ILD. IgA and IgM anti-MAA-albumin antibodies were associated with a higher risk of incident RA-ILD. These findings suggest that MAA modifications and resultant immune responses may contribute to RA-ILD pathogenesis. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • ISSN:
    2326-5191
  • Document Type:
  • Funding:
  • Genre:
  • Place as Subject:
  • CIO:
  • Topic:
  • Location:
  • Volume:
    76
  • Issue:
    9
  • NIOSHTIC Number:
    nn:20070121
  • Citation:
    Arthritis Rheumatol 2024 Sep; 76(9):1353-1363
  • Email:
    bryant.england@unmc.edu
  • Federal Fiscal Year:
    2024
  • NORA Priority Area:
  • Performing Organization:
    University of Nebraska Medical Center
  • Peer Reviewed:
    True
  • Start Date:
    20210901
  • Source Full Name:
    Arthritis and Rheumatology
  • End Date:
    20250831
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:497993c500b29dbfef0320c6c5d4c507ee66830f04e386013e138deb8246e33a4c6758ecc0b156b80162548ec0aa171202347f4fdf223f94e3b3b295458a6a68
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  • File Type:
    Filetype[PDF - 613.22 KB ]
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