Volume 72, Issue 1 pp. 25-34
ORIGINAL ARTICLE

Prognostic impact of HNF4α expression in interstitial lung disease

Tomoe Sawazumi

Tomoe Sawazumi

Division of Pathology, Yokohama City University Medical Center Hospital, Yokohama, Japan

Department of Pathology, Yokohama City University Graduate School of Medicine, Yokohama, Japan

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Tomohisa Baba

Tomohisa Baba

Division of Respiratory Medicine, Kanagawa Cardiovascular and Respiratory Center Hospital, Yokohama, Japan

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Tae Iwasawa

Tae Iwasawa

Division of Radiology, Kanagawa Cardiovascular and Respiratory Center Hospital, Yokohama, Japan

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Hiromasa Arai

Hiromasa Arai

Division of General Thoracic Surgery, Kanagawa Cardiovascular and Respiratory Center Hospital, Yokohama, Japan

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Mai Matsumura

Mai Matsumura

Department of Pathology, Yokohama City University Graduate School of Medicine, Yokohama, Japan

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Tamiko Takemura

Tamiko Takemura

Division of Pathology, Kanagawa Cardiovascular and Respiratory Center Hospital, Yokohama, Japan

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Misaki Sugiyama

Misaki Sugiyama

Division of Pathology, Kanagawa Cardiovascular and Respiratory Center Hospital, Yokohama, Japan

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Motoki Sekiya

Motoki Sekiya

Division of Pathology, Kanagawa Cardiovascular and Respiratory Center Hospital, Yokohama, Japan

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Yusuke Saigusa

Yusuke Saigusa

Department of Biostatistics, Yokohama City University Graduate School of Medicine, Yokohama, Japan

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Takashi Ogura

Takashi Ogura

Division of Respiratory Medicine, Kanagawa Cardiovascular and Respiratory Center Hospital, Yokohama, Japan

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Yoshiaki Inayama

Yoshiaki Inayama

Division of Pathology, Yokohama City University Medical Center Hospital, Yokohama, Japan

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Kenichi Ohashi

Kenichi Ohashi

Department of Pathology, Yokohama City University Graduate School of Medicine, Yokohama, Japan

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Koji Okudela

Corresponding Author

Koji Okudela

Department of Pathology, Yokohama City University Graduate School of Medicine, Yokohama, Japan

Correspondence Koji Okudela, MD, PhD, Department of Pathology, Yokohama City University Graduate School of Medicine, 3-9, Fukuura, Kanazawa-ku 236-0004, Yokohama, Japan.

Email: [email protected]

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First published: 13 October 2021
Citations: 1

Abstract

Pneumocyte injury is a crucial factor influencing the severity of interstitial lung disease (ILD). In this study, we investigated the potential of hepatocyte nuclear factor α (HNF4α) as an immunohistochemical marker to detect pneumocyte injury and as a prognostic marker. Surgical lung biopsy specimens were collected from 309 patients with different types of ILDs (61 idiopathic pulmonary fibrosis (IPF), 173 non-IPF, and 75 unclassifiable ILD). HNF4α expression were examined and the frequency of positive cells (per mm2) was calculated. HNF4α was strongly expressed in regenerating pneumocytes present on fibroblastic foci, Masson bodies/organizing alveoli. In the non-IPF and unclassifiable ILD groups, cases with high frequency expression showed significantly poorer outcome. Particularly, in the unclassifiable ILD group, the prognostic impact was more significant (death due to ILD, log-rank test, p < 0.0001), with a 10-year survival rate (hazard ratio 11.1, Wald test, p = 0.0003), as compared to the non-IPF group (log-rank test, p = 0.0269; hazard ratio 2.7, Wald test, p = 0.0334). Multivariable analysis focusing on the unclassifiable ILD group confirmed that the frequent HNF4α expression was an independent prognostic factor (hazard ratio 28.6; Wald test, p = 0.0033). Thus, HNF4α can be utilized as an immunohistochemical marker for pneumocyte injury and have prognostic impact particularly in unclassifiable ILD.

CONFLICT OF INTERESTS

None declared.

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