Prognostic values of MUC-1 molecule expressing cytokine receptor-like epitope and DF3 in patients with gastric carcinoma

Int J Oncol. 1999 Mar;14(3):425-35. doi: 10.3892/ijo.14.3.425.

Abstract

As recently reported, DF3/MUC-1 molecules having cytokine receptor-like sequences (CRL) at the extracellular region, are likely to function in signal transduction pathways. To elucidate the functional significance of CRL expressed on the DF3/MUC1 molecule, immunohistochemical localization of CRL and/or DF3 was investigated in cases of 115 patients with gastric carcinomas, treated by surgical resection. CRL was detected in 65 of 115 patients (56.5%), DF3 in 85 (73.9%), and both DF3 and CRL in 52 (45.2%). The combined immunohistochemical analysis of CRL and/or DF3, revealed that simultaneous expression of DF3 and CRL (DF3+/CRL+) significantly correlated to lymph node metastasis and to blood vessel invasion, and that patients with DF3+/CRL+-tumors survived for a significantly shorter period after surgery than did the other three groups (DF3+/CRL-, DF3-/CRL+, and DF3-/CRL-). Multivariate analysis showed independent prognostic significance for DF3+/CRL+ expression (hazard ratio [HR]=2.733, P=0.0085), and surgical cure (HR=4.334, P=0.003). To investigate the biological role of the simultaneous expression of DF3 and CRL, we constructed DF3-/CRL+ (NR-MC-38) and DF3+/CRL+ (R-MC-38) cells by transducing a mouse colon adenocarcinoma cell line MC-38 expressing neither DF3 nor CRL with MUC-1 cDNA containing ten tandem repeats (R-MC-38) or MUC-1 cDNA devoid of tandem repeats (NR-MC-38). R-MC-38 (DF3+/CRL+) cells were more invasive than NR-MC-38 (DF3-/CRL+) and MC-38 (DF3-/CRL-) cells. When these transfectants were incubated with pAb CRL, the invasiveness of R-MC-38 (DF3+/CRL+) was strikingly elevated over the case with native MC-38 (DF3-/CRL-) and NR-MC-38 (DF3-/CRL+) cells. The pAb CRL-induced invasiveness of R-MC-38 cells was inhibited by adding mAb DF3 or CRL peptides together with pAb CRL. These results suggest that an expression of DF3/MUC1 is highly associated with cell-invasiveness, and the DF3/MUC1-associated invasiveness is amplified by CRL. Thus DF3+/CRL+-MUC-1 molecule seems to be closely involved in a poor prognosis for gastric cancer patients.

MeSH terms

  • Adult
  • Aged
  • Animals
  • Antigens, Neoplasm / biosynthesis*
  • Antigens, Neoplasm / metabolism
  • Biomarkers, Tumor / biosynthesis
  • Epitopes
  • Female
  • Humans
  • Immunohistochemistry
  • Male
  • Mice
  • Middle Aged
  • Mucin-1 / biosynthesis*
  • Mucin-1 / metabolism
  • Neoplasm Invasiveness
  • Prognosis
  • Receptors, Cytokine / chemistry
  • Receptors, Cytokine / metabolism*
  • Stomach Neoplasms / chemistry
  • Stomach Neoplasms / metabolism*
  • Stomach Neoplasms / pathology
  • Survival Analysis
  • Tumor Cells, Cultured

Substances

  • Antigens, Neoplasm
  • Biomarkers, Tumor
  • Epitopes
  • Mucin-1
  • Receptors, Cytokine