Abstract
Background
c-Met relies on CD44v6 for its activation and signaling in several cancer cell lines. However, the correlation of c-Met and CD44v6 expression and its biological significance in esophageal squamous cell carcinoma (ESCC) remains unknown.
Methods
Expression of c-Met and CD44v6 was examined by immunohistochemistry (IHC) in 147 ESCC specimens. We analyzed the impact of c-Met and CD44v6 expression on clinicopathological parameters, including chemoresistance or prognosis in ESCC.
Results
High expression of c-Met and CD44v6 in cancerous lesions was identified in 49.7% and 50.3% of all patients, respectively. The c-Met-high group comprised more advanced pT and pM stages than the c-Met-low group. In addition, more patients in the c-Met-high group received neoadjuvant chemotherapy (NACT) than the c-Met-low group (64.4% vs. 43.2%, P = 0.010). On the other hand, the CD44v6-high group was associated with more advanced pT/pN stages and a poorer clinical response to NACT (response rate 53.5% vs. 77.8%, P = 0.025) than the CD44v6-low group. Double-positive immunostaining of c-Met and CD44v6 was identified in 28.6% of all cases, and multivariate analysis of overall survival (OS) identified them (hazard ratio 1.79, 95% confidence interval 1.03–3.04, P = 0.038) as independent prognostic factors in addition to pN and pM stage.
Conclusions
c-Met/CD44v6 were associated with tumor progression or chemoresistance. Double-positive expression of c-Met and CD44v6 negatively impacted patient prognosis in ESCC, implying that c-Met and CD44v6 are candidates for targeted therapy in ESCC.
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TH, TM, MY, MM, and YD: conception, design of the study; TH, TM, MY, KT, and YD: surgery and acquisition of clinical data; TH: immunohistochemical staining; TH, TM, and NM: evaluation of immunohistochemical staining; TH, TM, YM, TT, YK, and KN: analysis of data; TH: drafting the article; TM: critical revision of the article; MM and YD: final approval of the article.
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Supplemental Fig. S1
Kaplan-Meier survival analysis of overall survival among patients who (a) did not receive preoperative therapy classified by c-Met expression, (b) did not receive preoperative therapy classified by CD44v6 expression, (c) did not receive preoperative therapy classified by c-Met and CD44v6 expression, (d) received preoperative chemotherapy classified by c-Met expression, (e) received preoperative chemotherapy classified by CD44v6 expression, and (f) received preoperative chemotherapy classified by c-Met and CD44v6 expression (TIFF 193 kb)
Supplemental Fig. S2
Kaplan-Meier survival analysis of overall survival according to c-Met/CD44v6 expression in (a) pT1-2 group, (b) pN0 group, (c) pT3-4 group, (d) pN1-3 group (TIFF 154 kb)
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Hara, T., Makino, T., Yamasaki, M. et al. Effect of c-Met and CD44v6 Expression in Resistance to Chemotherapy in Esophageal Squamous Cell Carcinoma. Ann Surg Oncol 26, 899–906 (2019). https://doi.org/10.1245/s10434-018-07126-5
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DOI: https://doi.org/10.1245/s10434-018-07126-5