Abstract
Background
A previous study conducted a transcriptome analysis of paired normal and esophageal squamous cell carcinoma (ESCC) tissue samples. The results showed that the expression of serine protease 27 (PRSS27) was perturbed in tumor samples. Hence, this retrospective study aimed to validate the prognostic significance of PRSS27 in patients with preoperative treatment for ESCC.
Methods
We enrolled 86 patients who received preoperative treatment before esophagectomy for ESCC. The expression of PRSS27 in resected ESCC and biopsy tissue samples obtained before preoperative treatment was evaluated via immunostaining, and its relationship with clinicopathological features and prognosis was analyzed.
Results
In normal esophageal mucosa tissue samples, PRSS27 was expressed in the cytoplasm of spinous cells in the suprabasal layer and basal cells in the basal layer. Of 64 resected ESCC tissue samples, 35 (54.7%) expressed PRSS27 and 29 (45.3%) did not. Moreover, ectopic nuclear expression of PRSS27 was observed. Based on multivariate analysis, PRSS27 expression in resected tumor samples was a predictor of poor prognosis. In cases in which PRSS27 expression was observed in biopsy samples, patients with PRSS27-negative resected tumors had a better postoperative prognosis than those with PRSS27-positive resected tumors.
Conclusions
PRSS27 expression in resected ESCC tissue samples is a poor prognostic factor in ESCC patients with preoperative treatment. Furthermore, conversion of PRSS27 expression from positive in biopsy samples to negative in resected tumor samples is a predictor of good prognosis in these patients. Hence, PRSS27 status is an effective tool for decision making regarding adjuvant treatment in ESCC patients.
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Acknowledgments
The authors thank Drs. Miwa Tamura-Nakano and Chinatsu Oyama in the NCGM EM Support Unit for their technical support in the histological analysis, and Ms. Yasuko Nozaki for her technical assistance. They would also like to thank Enago (www.enago.jp) for the English-language review. This work was supported by JSPS KAKENHI grant numbers JP15K10124, JP19K08457, and by grants from the NCGM (26-117, 29-1019 and 20A1017).
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Atsuko Kataoka, Kazuhiko Yamada, Teruki Hagiwara, Masayoshi Terayama, Takayuki Sugimoto, Kyoko Nohara, Toru Igari, Chizu Yokoi, and Yuki I. Kawamura have no financial or other relationships that could lead to a commercial interest.
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Kataoka, A., Yamada, K., Hagiwara, T. et al. Expression Status of Serine Protease 27: A Prognostic Marker for Esophageal Squamous Cell Carcinoma Treated with Preoperative Chemotherapy/Chemoradiotherapy. Ann Surg Oncol 28, 5373–5381 (2021). https://doi.org/10.1245/s10434-020-09550-y
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DOI: https://doi.org/10.1245/s10434-020-09550-y