The prognostic role of tumor associated macrophages in squamous cell carcinoma of the head and neck: A systematic review and meta-analysis

Oral Oncol. 2022 Dec:135:106227. doi: 10.1016/j.oraloncology.2022.106227. Epub 2022 Nov 3.

Abstract

Head and neck squamous cell carcinoma (HNSCC) is an immunogenic cancer type, and tumor associated macrophages (TAMs) are a major component of the tumor microenvironment (TME). In this systematic review and meta-analysis, studies assessing tumor infiltration with CD68+, iNOS+, HLA-DR+, CD11b+, CD163+, CD206+, and CD204+TAMs were included, and correlation to survival hazard was studied. A low number of CD68+TAMs correlated to better overall survival (OS) in multivariate analysis (HR 1.36 95 %CI (1.07-1.72) P = .01). CD68+TAMs did not correlate to disease free survival (DFS), disease specific survival (DSS), progression free survival (PFS), or recurrence free survival (RFS). A low number of CD163+TAMs correlated to better OS in uni- and multivariate analysis (resp. HR 2.65 95 %CI (1.57-4.46) P = .01 and HR 2.42 95 %CI (1.72-3.41) P < .001). A low number of CD163+TAMs also correlated to better DFS and PFS, whereas a low number of CD204+TAMs only correlated to PFS. While IHC analysis of pan macrophage marker CD68 and M2-like marker CD163 both show prognostic utility in OS, CD163 is a stronger prognosticator, as indicated by multivariate meta-analysis. CD163+TAMs also correlate to DFS and PFS; outcomes that are more relevant to patients, thus showing promising results for future clinical implementation.

Keywords: CD163; CD204; CD206; CD68; Disease free survival (DFS); Disease specific survival (DSS); Head and Neck Squamous Cell Carcinoma (HNSCC); Locoregional control (LRC); Overall survival (OS); Progression free survival (PFS); Recurrence free survival (RFS); Tumor associated macrophages (TAMs).

Publication types

  • Meta-Analysis
  • Systematic Review
  • Review

MeSH terms

  • Antigens, Differentiation, Myelomonocytic / metabolism
  • Head and Neck Neoplasms*
  • Humans
  • Prognosis
  • Squamous Cell Carcinoma of Head and Neck
  • Tumor Microenvironment
  • Tumor-Associated Macrophages*

Substances

  • Antigens, Differentiation, Myelomonocytic