Radiological features of IDO1+/PDL1+ lung adenocarcinoma: A retrospective single-institution study

Kazuki Takada, Gouji Toyokawa, Tetsuzo Tagawa, Mototsugu Shimokawa, Kenichi Kohashi, Akira Haro, Atsushi Osoegawa, Yoshinao Oda, Yoshihiko Maehara

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Abstract

Aim: A combination of immune-checkpoint inhibitors that target the programmed cell death 1 (PD1)/programmed cell-death ligand 1 (PDL1) pathway and indoleamine 2,3-dioxygenase 1 (IDO1) is a promising treatment for non-small-cell lung cancer. Herein, we investigated clinical features of IDO1+/PDL1+ primary lung adenocarcinoma. Materials and Methods: IDO1 and PDL1 expression in 388 resected primary lung adenocarcinoma samples was evaluated using immunohistochemistry, and the radiological features of patients with IDO1+/PDL1+ lung adenocarcinoma were analyzed. Results: Of 388 specimens, 229 (59.0%) were IDO1+, 131 (33.8%) were PDL1+, and 109 (28.1%) were IDO1+/PDL1+. In multivariate analysis, vascular convergence and the absence of surrounding ground glass opacity were significantly associated with IDO1+/PDL1+ tumors. Fisher’s exact test showed high consolidation/tumor ratio was also significantly associated with IDO1+/PDL1+ tumors. Moreover, maximum standardized uptake in18F-fluorodeoxyglucose positron-emission tomography/computed tomography was significantly higher in patients with IDO1+/PDL1+ tumors than in those with IDO1 or PDL1 tumors. Conclusion: IDO1/PDL1 co-expression was significantly related to radiological invasiveness and malignancy in lung adenocarcinoma. This study may help select patients likely to benefit from combination therapy using immune-checkpoint inhibitors.

Original languageEnglish
Pages (from-to)5295-5303
Number of pages9
JournalAnticancer research
Volume38
Issue number9
DOIs
Publication statusPublished - Sep 2018

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CD274 Antigen
Indoleamine-Pyrrole 2,3,-Dioxygenase
Neoplasms
Adenocarcinoma of lung
Cell Death

All Science Journal Classification (ASJC) codes

  • Oncology
  • Cancer Research

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Radiological features of IDO1+/PDL1+ lung adenocarcinoma : A retrospective single-institution study. / Takada, Kazuki; Toyokawa, Gouji; Tagawa, Tetsuzo; Shimokawa, Mototsugu; Kohashi, Kenichi; Haro, Akira; Osoegawa, Atsushi; Oda, Yoshinao; Maehara, Yoshihiko.

In: Anticancer research, Vol. 38, No. 9, 09.2018, p. 5295-5303.

Research output: Contribution to journalArticle

Takada, Kazuki ; Toyokawa, Gouji ; Tagawa, Tetsuzo ; Shimokawa, Mototsugu ; Kohashi, Kenichi ; Haro, Akira ; Osoegawa, Atsushi ; Oda, Yoshinao ; Maehara, Yoshihiko. / Radiological features of IDO1+/PDL1+ lung adenocarcinoma : A retrospective single-institution study. In: Anticancer research. 2018 ; Vol. 38, No. 9. pp. 5295-5303.
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AU - Kohashi, Kenichi

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