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Example:10.1021/acsami.1c06204 or Chem. Rev., 2007, 107, 2411-2502
HLA-B54 is an independent risk factor for pneumonia in Japanese patients with interstitial lung disease: A multicenter retrospective cohort study
Respiratory Medicine  (IF3.415),  Pub Date : 2021-09-16, DOI: 10.1016/j.rmed.2021.106612
Noriho Sakamoto, Hiroshi Ishimoto, Masahiro Tahara, Takashi Kido, Atsuko Hara, Takuto Miyamura, Daisuke Okuno, Takatomo Tokito, Sumako Yoshioka, Shimpei Morimoto, Takahiro Takazono, Kazuko Yamamoto, Hiroyuki Yamaguchi, Yasushi Obase, Yuji Ishimatsu, Kazuhiro Yatera, Hiroshi Mukae


Pneumonia is a major cause of respiratory-related hospitalization and an important prognostic factor in patients with chronic interstitial lung disease (ILD). However, the relationship between the incidence of pneumonia and human leukocyte antigen (HLA) serotype has not been fully elucidated. Therefore, this study aimed to determine if there is a relationship between HLA serotype and the incidence of pneumonia in Japanese patients with ILD.


The medical records of patients with ILD treated at any of three centers in Japan were reviewed to determine their HLA-A and HLA-B serotypes. The characteristics of patients with and without pneumonia were compared. Cox regression analysis was performed to identify risk factors for pneumonia and death in these patients.


One hundred and forty-four patients with ILD (pneumonia group, n = 27; non-pneumonia group, n = 117) and complete HLA serology data available were included. HLA-B54 positivity was significantly more common in the pneumonia group than in the non-pneumonia group (37.0% vs. 15.4%, p = 0.010). HLA-B54 positivity was also a significant risk factor for pneumonia (hazard ratio [HR] 4.166, 95% confidence interval [CI] 1.862–9.320, p = 0.001) and death (HR 4.050, 95% CI 1.581–10.374, p = 0.004) in patients with ILD. Furthermore, HLA-B54 positivity was a significant risk factor for pneumonia (HR 3.964, 95% CI 1.392–11.090, p = 0.010) and death (HR 8.131, 95% CI 1.763–37.494, p = 0.007) in patients with idiopathic pulmonary fibrosis.


HLA-B54 positivity was a significant risk factor for pneumonia and death in patients with ILD, including those with idiopathic pulmonary fibrosis.