A novel classification of MUC1 expression is correlated with tumor differentiation and postoperative prognosis in non-small cell lung cancer

J Thorac Oncol. 2006 Jan;1(1):46-51.


Background: MUC1 is a transmembrane mucin that plays an important role in tumor progression. Many clinical studies have suggested that the expression pattern of MUC1 core protein can be a useful prognostic marker in various malignancies, but the prognostic significance in non-small cell lung cancer (NSCLC) remains uncertain. We performed a study to assess clinical significance, especially prognostic impact, of MUC1 expression in NSCLC.

Methods: A total of 62 patients with completely resected pathologic stage I to IIIA NSCLC were retrospectively reviewed. Histologic sections cut from primary tumors were immunohistochemically stained with an anti-MUC1 monoclonal antibody (CA15-3, clone DF3), which recognizes unglycosylated epitope of MUC1 core protein. According to MUC1 expression pattern, each patient was classified into the high-grade polarized expression (HP), the low-grade polarized expression (LP), or the depolarized expression (D) group.

Results: Twenty-four (38.7%), 21 (33.9%), and 17 (27.4%) patients were classified into the HP group, the LP group, and the D group, respectively. HP was exclusively seen in adenocarcinoma, mostly in well-differentiated adenocarcinoma. D was correlated with progressive stage and lymph node metastasis. Postoperative survival of the D group seemed to be poorer than that of the HP group for all NSCLC patients, and the difference was enhanced in adenocarcinoma patients.

Conclusion: A novel classification of MUC1 expression pattern (HP, LP, and D) was correlated with tumor differentiation and postoperative survival in NSCLC, especially in lung adenocarcinoma.

MeSH terms

  • Aged
  • Antigens, Neoplasm / biosynthesis
  • Antigens, Neoplasm / classification*
  • Antigens, Neoplasm / genetics
  • Biomarkers
  • Carcinoma, Non-Small-Cell Lung* / metabolism
  • Carcinoma, Non-Small-Cell Lung* / pathology
  • Carcinoma, Non-Small-Cell Lung* / surgery
  • DNA, Neoplasm / genetics*
  • Disease Progression
  • Female
  • Gene Expression Regulation, Neoplastic*
  • Humans
  • Immunohistochemistry
  • Lung Neoplasms* / metabolism
  • Lung Neoplasms* / pathology
  • Lung Neoplasms* / surgery
  • Male
  • Mucin-1
  • Mucins / biosynthesis
  • Mucins / classification*
  • Mucins / genetics
  • Neoplasm Staging
  • Pneumonectomy*
  • Postoperative Period
  • Prognosis
  • Retrospective Studies
  • Survival Rate


  • Antigens, Neoplasm
  • Biomarkers
  • DNA, Neoplasm
  • MUC1 protein, human
  • Mucin-1
  • Mucins