Serial measurements of KL-6 for monitoring activity and recurrence of interstitial pneumonia with anti-aminoacyl-tRNA synthetase antibody

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  • A retrospective cohort study

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<jats:sec> <jats:title>Abstract</jats:title> <jats:p>The aim of this study was to evaluate whether serial measurements of serum Krebs von den Lungen-6 (KL-6) could be used to monitor disease activity and to detect recurrence in patients with interstitial pneumonia (IP) with anti-aminoacyl-tRNA synthetase antibodies (ARS-IP).</jats:p> <jats:p>This retrospective cohort study included 44 patients with ARS-IP. Thirty-six patients had serial data of blood tests and pulmonary function tests. Baseline and longitudinal analyses were performed to investigate whether lung function parameters were associated with serum biomarkers (KL-6, lactate dehydrogenase [LDH], and C-reactive protein [CRP]) using Pearson correlation coefficient. Additionally, the diagnostic accuracy of changes in these biomarkers for detecting ARS-IP recurrence was analyzed by receiver operating characteristic curve analysis.</jats:p> <jats:p>Baseline levels of serum KL-6 were significantly associated with vital capacity (VC) and diffusion capacity for carbon monoxide (DLco) (<jats:italic toggle="yes">r</jats:italic> = −0.40, <jats:italic toggle="yes">P</jats:italic> = .015, and <jats:italic toggle="yes">r</jats:italic> = −0.44, <jats:italic toggle="yes">P</jats:italic> = .010, respectively). Longitudinal changes in KL-6 were inversely correlated with changes in VC and DLco (<jats:italic toggle="yes">r</jats:italic> = −0.57, <jats:italic toggle="yes">P</jats:italic> <.001 and <jats:italic toggle="yes">r</jats:italic> = −0.42, <jats:italic toggle="yes">P</jats:italic> <.001, respectively), whereas those in LDH and CRP were not. Moreover, longitudinal changes in serum KL-6 were significantly associated with recurrence of ARS-IP and could be used to detect ARS-IP recurrence; the area under the curve was 0.79 (<jats:italic toggle="yes">P</jats:italic> = .002).</jats:p> <jats:p>The present study demonstrated that serial measurement of KL-6 is useful for monitoring disease activity and detecting recurrence of ARS-IP.</jats:p> </jats:sec>

Journal

  • Medicine

    Medicine 97 (49), e13542-, 2018-12

    Ovid Technologies (Wolters Kluwer Health)

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