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Prognostic Significance of Rab27A and Rab27B Expression in Esophageal Squamous Cell Cancer

Authors Yu F, Wu W, Liang M, Huang Y, Chen C

Received 21 April 2020

Accepted for publication 9 June 2020

Published 27 July 2020 Volume 2020:12 Pages 6353—6361


Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2

Editor who approved publication: Dr Chien-Feng Li

Fengqiang Yu,* Weihan Wu,* Mingqiang Liang,* Yu Huang, Chun Chen

Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, People’s Republic of China

*These authors contributed equally to this work

Correspondence: Chun Chen
Department of Thoracic Surgery, Fujian Medical University Union Hospital, #29 Xinquan Road, Fuzhou, Fujian 350001, People’s Republic of China
Tel +86 13365910325
Fax +86 591-83357896-8408

Purpose: Rab27A and Rab27B, members of the Rab family of small GTPases, have aberrant expression and exert different roles in various cancers. However, their expression and potential prognostic values in esophageal squamous cell cancer (ESCC) still remain elusive. In the present study, we explored the association of Rab27A and Rab27B expression with clinical significance and prognosis in ESCC.
Patients and Methods: A total of 100 surgically resected ESCC tissues were examined to evaluate Rab27A and Rab27B expression levels using the immunohistochemistry method. The relationship of Rab27A and Rab27B with clinicopathological features and prognosis was analyzed. We also investigated the correlation between Rab27A and Rab27B through external and internal validation.
Results: High-expression Rab27A was found to be significantly correlated with N (p=0.045) and TNM (p=0.005) stage, while up-regulated Rab27B was remarkably associated with N stage (p=0.033), TNM stage (p=0.009), and differentiation (p=0.013). High expression of both Rab27A and Rab27B had a worse overall survival (OS) rate. In addition, multivariate Cox regression analyses were utilized to validate that Rab27B expression is an independent prognostic factor for unfavorable OS. Further combined analyses showed that the Rab27Alow/Blow group had a superior OS rate than the Rab27Ahigh/Blow group, Rab27Alow/Bhigh group, and Rab27Ahigh/Bhigh group. Nevertheless, the latter three groups displayed rare significance between each two comparisons. Furthermore, our data demonstrated that Rab27A expression was positively correlated with Rab27B expression, which were also verified in TCGA datasets.
Conclusion: Rab27A and Rab27B expression levels could be potentially novel prognostic biomarkers in ESCC.

Keywords: Rab27A, Rab27B, esophageal squamous cell cancer, prognosis, survival analysis

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