GRP78 Expression and Prognostic Significance in Patients with Pancreatic Ductal Adenocarcinoma Treated with Neoadjuvant Therapy Versus Surgery First

Overview

Journal Pancreatology

Specialties Endocrinology
Gastroenterology

Date 2021 Aug 25

PMID 34429247

Citations 1

Authors

Yi Tat Tong

Hua Wang

Dongguang Wei

Laura R Prakash

Michael Kim

Ching-Wei D Tzeng

Jeffrey E Lee

Asif Rashid

Eugene J Koay

Robert A Wolff

Anirban Maitra

Matthew Hg Katz

Huamin Wang

Affiliations

Soon will be listed here.

Abstract

Background: Glucose-regulated protein 78 (GRP78) plays an essential role in protein folding, transportation, and degradation, thus regulates ER homeostasis and promotes cell survival, proliferation and invasion. GRP78 expression in PDAC patients who received neoadjuvant therapy has not been reported.

Methods: This retrospective study of resected PDAC patients included 125 patients treated with neoadjuvant therapy (NAT) and 140 patients treated with surgery first (SF). The expression of GRP78 was evaluated by immunohistochemistry on tissue microarrays and the results were correlated with clinicopathologic parameters and survival.

Results: GRP78 expression was higher in SF patients compared to NAT patients (P < 0.001). In SF cohort, the median disease-free survival (DFS) and overall survival (OS) for patients with GRP78-positive tumors were 11.2 months and 25.0 months, respectively, compared to DFS of 52.1 months (P = 0.008) and OS of 69.5 months (P = 0.02) for those with GRP78-negative tumors. GRP78 expression correlated with higher frequency of recurrent/metastasis (P = 0.045). In NAT cohort, GRP78 expression correlated with shorter OS (P = 0.03), but not DFS (P = 0.08). GRP78 expression was an independent prognosticator for both DFS (P = 0.02) and OS (P = 0.049) in SF cohort and was an independent prognosticator for OS (P = 0.03), but not for DFS (P = 0.06) in NAT cohort by multivariate analysis.

Conclusions: Our study showed that GRP78 expression in NAT cohort is lower than that in SF cohort. GRP78 expression correlated with shorter survival in both SF and NAT patients. Our findings suggest that targeting GRP78 may help to improve the prognosis in PDAC patients.

Citing Articles

New progresses on cell surface protein HSPA5/BiP/GRP78 in cancers and COVID-19.

Li T, Fu J, Cheng J, Elfiky A, Wei C, Fu J Front Immunol. 2023; 14:1166680.

PMID: 37275848 PMC: 10232979. DOI: 10.3389/fimmu.2023.1166680.

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