Folate receptor-α expression in resectable hepatic colorectal cancer metastases: Patterns and significance

Michael D'Angelica, John Ammori, Mithat Gonen, David S. Klimstra, Philip S. Low, Linda Murphy, Martin R. Weiser, Philip B. Paty, Yuman Fong, Ronald P. Dematteo, Peter Allen, William R. Jarnagin, Jinru Shia

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


Folate receptor alpha (FRα), encoded by folate receptor 1 (adult) gene, has emerged as a cancer biomarker and potential therapeutic target. In addition, its expression in tumors may offer prognostic information. The aim of this study was to assess the prognostic value of FRα expression and other common molecular markers in resected liver metastases from colorectal cancer. To maximize potential biological differences, we selected two groups of patients with markedly different outcomes as study subjects. Immunohistochemical analysis of FRα expression and other common markers (thymidylate synthase, p53, p27, BCL2, ki67, MLH1, MSH2 and MGMT) on tissue microarrays was carried out on samples from 160 patients; 56 patients survived at least 10 years following liver resection, and 104 died within 2 years of surgery. These markers were evaluated and compared with standard clinical predictors of outcome including a previously validated clinical risk score. Our results showed that in addition to known clinical risk factors, FRα positivity was significantly associated with the early death group (32% compared with 13%; P=0.03). None of the other common molecular markers were differentially expressed between the two groups. On multivariate analysis, clinical risk score, margin status and FRα expression were independently associated with outcome. Specific multivariate comparisons confirmed that FRα expression was associated with outcome independent of the clinical risk score and margin. These data demonstrate that FRα expression is present in a subset of resected hepatic colorectal cancer metastases, and this marker is independently associated with survival after hepatic resection. The prognostic value of FRα expression and the utility of FRα-targeted therapies in stage-IV colorectal cancer patients deserve further exploration.

Original languageEnglish (US)
Pages (from-to)1221-1228
Number of pages8
JournalModern Pathology
Issue number9
StatePublished - Sep 2011


  • Folate receptor 1 (adult)
  • folate-targeted therapy
  • liver metastasis

ASJC Scopus subject areas

  • Pathology and Forensic Medicine


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