The Significance of CD44 Variant 9 in Resected Lung Adenocarcinoma: Correlation with Pathological Early-Stage and EGFR Mutation.

Abstract:

BACKGROUND:CD44 isoforms serve as a marker for cancer stem cells. CD44 variant 9 (CD44v9) contributes to the defense against reactive oxygen species, resulting in resistance to chemoradiotherapy. However, the significance of CD44v9 in patients with lung adenocarcinoma is unknown. METHODS:We used immunohistochemical analysis to retrospectively analyze CD44v9 expression in 268 surgically resected lung adenocarcinomas and investigated the association between CD44v9 expression and patients' clinicopathological features. RESULTS:The expression of CD44v9 in 193 of 268 (72.0%) patients was significantly associated with early-stage cancer, low-grade tumors, absence of vessel and pleural invasion, and a mutated epidermal growth factor receptor (EGFR) gene. Multivariate logistic analysis revealed that CD44v9 expression was significantly associated with early-stage disease [odds ratio (OR) 0.29, 95% confidence interval (CI) 0.14-0.59; p < 0.001] and mutant EGFR (OR 2.53, 95% CI 1.06-6.04; p = 0.036). The percentage of CD44v9-positive tumors was higher in the earlier stages of disease; however, there was no significant difference in the survival of patients in each stage of disease who had positive or negative CD44v9 expression. CONCLUSION:CD44v9 was highly expressed in EGFR-mutant tumors, particularly in early-stage lung adenocarcinoma, suggesting that CD44v9 expression may play an important role in EGFR-mutant tumors.

journal_name

Ann Surg Oncol

authors

Akamine T,Tagawa T,Ijichi K,Toyokawa G,Takamori S,Hirai F,Okamoto T,Oda Y,Maehara Y

doi

10.1245/s10434-018-07137-2

subject

Has Abstract

pub_date

2019-05-01 00:00:00

pages

1544-1551

issue

5

eissn

1068-9265

issn

1534-4681

pii

10.1245/s10434-018-07137-2

journal_volume

26

pub_type

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