Practical Geriatrics ›› 2024, Vol. 38 ›› Issue (8): 802-807.doi: 10.3969/j.issn.1003-9198.2024.08.011

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Expression levels and clinical significance of serum S100A9 and sCD163 in elderly patients with idiopathic interstitial pneumonia

WANG Xinping, XIE Baimei, WEI Guo, YE Xiaoli, ZHAO Yayun, TAN Xiaotian   

  1. Department of Geriatrics, Air Force Medical University Air Force 986th Hospital, Xi’an 710054, China
  • Received:2023-10-15 Online:2024-08-20 Published:2024-08-26
  • Contact: TAN Xiaotian, Email: tanxiaotian451@126.com

Abstract: Objective To study the levels of serum S100 calcium binding protein A9 (S100A9) and soluble CD163 (sCD163) in the elderly patients with idiopathic interstitial pneumonia (IIP), and to explore their clinical significance. Methods A total of 96 elderly patients with IIP who were treated in our hospital from May 2019 to May 2022 were selected. According to the severity of IIP, the patients were divided into acute exacerbation group (n=62) and stable phase group (n=34). According to the 3-month follow-up of the patients in the acute exacerbation group, they were divided into survival subgroup (n=40) and death subgroup (n=22).Sixty healthy individuals who underwent physical examination during the same period were selected as the control group. Enzyme linked immunosorbent assay was used to detect the serum levels of S100A9 and sCD163.Multivariate Logistic regression analysis was used to investigate the influencing factors of death in the elderly patients with acute exacerbation phase of IIP. The predictive value of serum S100A9 and sCD163 for mortality in the patients with acute exacerbation of IIP was analyzed by receiver operating characteristic (ROC) curve. Results The serum levels of S100A9 and sCD163 in the acute exacerbation group were significantly higher than those in the stable phase group and the control group (all P<0.01).The levels of serum S100A9 and sCD163 in the elderly patients with acute exacerbation phase of IPP were positively correlated with erythrocyte sedimentation rate and high resolution computed tomography (HRCT) score (all P<0.05). Multivariate Logistic regression analysis showed that HRCT scores, the levels of S100A9 and sCD163 were the independent influencing factors for mortality in the elderly patients with acute exacerbation phase of IIP. ROC curve analysis showed that the area under the curve(AUC) of the combination of HRCT score, serum S100A9 and sCD163 in predicting mortality in the elderly patients with acute exacerbation phase of IIP was 0.907, which was higher than that of the single indicator (Z=5.183, 4.349, 5.127, all P<0.05). Conclusions The combination detection of S100A9 and sCD163 has high predictive value for mortality in the elderly patients with acute exacerbation phase of IIP.

Key words: aged, idiopathic interstitial pneumonia, S100 calcium-binding protein A9, soluble CD163, prognosis

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