Peripheral CD45RO, PD-1, and TLR4 expression in metastatic colorectal cancer patients treated with bevacizumab, fluorouracil, and irinotecan (FOLFIRI-B)

Vincenzo Formica, Vittore Cereda, Maria Giovana Di Bari, Italia Grenga, Manfredi Tesauro, Palmirotta Raffaele, Patrizia Ferroni, Fiorella Guadagni, Mario Roselli

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CD45RO, PD-1, and TLR4 immune pathways have proven pivotal in regulating antitumor response and correlate with survival for localized colorectal cancer (CRC). We evaluated if their peripheral expression was associated with outcome in metastatic CRC (mCRC). Thirty-one mCRC patients were eligible for this prospective study ( NCT01533740) and treated with first-line FOLFIRI-B. Blood was drawn before the first and third cycle and analyzed by flow cytometry for frequency (%) of CD4+, CD8+, CD45RO+, and PD1+ mononuclear cells and for TLR4 expression on neutrophils. Two cycles of chemotherapy determined changes in immune variables that were prognostically meaningful. Pre-third-cycle (ptc) CD45RO+CD8+cell% displayed a statistically significant association with progression-free survival (PFS) (median PFS 22.4 vs. 9.4 months for patients with CD45RO+CD8+cell%> vs.

Original languageEnglish
Article number743
JournalMedical Oncology
Issue number4
Publication statusPublished - 2013



  • CD45RO
  • Colorectal cancer
  • PD-1
  • TLR4

ASJC Scopus subject areas

  • Oncology
  • Cancer Research
  • Hematology
  • Medicine(all)

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