Abstract

Chemokine-like factor (CKLF)-like MARVEL transmembrane domain containing protein 6 (CMTM6) is a ubiquitously expressed protein, which plays a critical role in the stability of programmed death-ligand 1. However, the expression of CMTM6 in a variety of cancer pathological tissues is not clear. Therefore, 109 patients who were diagnosed with nonsmall cell lung cancer (NSCLC) and underwent surgical resection were included in this retrospective study. The expression of CMTM6 in NSCLC patients' tissue samples were measured by immunohistochemistry and the results showed that 60 cases (55.05%) had high CMTM6 expression. The chi-square test showed that the expression of CMTM6 in NSCLC was significantly related to smoking (p = 0.017) and differentiation (p = 0.029). The Kaplan-Meier survival analysis suggested that the high expression of CMTM6 was associated with better prognosis of NSCLC patients. The univariate analysis revealed that the prognosis of NSCLC patients was correlated with T stage (p = 0.042), lymph node metastasis (p = 0.007), metastasis (p = 0.009), pathological differentiation (p = 0.001), and CMTM6 expression level (p < 0.001). In addition, multivariate analysis indicated that CMTM6 was an independent prognostic factor for NSCLC patients (p = 0.002). CMTM6 expression may have the potential to be a biomarker assisting in disease monitoring and prognosis in NSCLC.

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