Targeting Myeloid Cells to Shape Tumor

A special issue of Biomedicines (ISSN 2227-9059). This special issue belongs to the section "Cell Biology and Pathology".

Deadline for manuscript submissions: closed (31 March 2021) | Viewed by 3688

Special Issue Editor


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Guest Editor
Pharmacy Department, University of Bordeaux, 33076 Bordeaux, France
Interests: tumor immunology; immunodeficiency; macrophages; dendritic cells
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Myeloid cells (monocytes, dendritic cells, macrophages, myeloid-derived suppressive cells and neutrophils) in the tumor microenvironment (TME) shape immunity against cancer cells. In the past decade, numerous studies have provided novel insights into the complexity of myeloid subsets and their functional diversity within tumors. Myeloid cells can either promote anti-tumor immunity or contribute to tumor progression depending on the cell population, cell subset and/or their activation status. Particularly, these myeloid cells act as antigen-presenting cells and therefore initiate adaptive immune responses, but they also produce/express diverse molecules to promote tumor progression. Consequently, multiple approaches have recently been developed to target these cells by depleting them, activating them or remodeling their phenotypes in order to restore or boost anti-tumor immune responses.

The Special Issue “Targeting Myeloid Cells to Shape Tumor Immunity” aims to highlight the importance of myeloid cells in tumor immunosurveillance and their targeting as a potential therapeutic approach. Articles or reviews on the following, but not limited to, topics are welcome:

- Heterogeneity of myeloid cells in the TME;

- Phenotypical and functional characteristics of TME-infiltrating myeloid cells;

- Plasticity of myeloid cells;

- Myeloid-cell-mediated modulation of tumor immunity;

- Myeloid cells and responses to immunotherapies;

- Novel approaches to target myeloid cells in tumors.

Dr. Dorothée Duluc
Guest Editor

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Keywords

  • dendritic cells
  • macrophages
  • neutrophils
  • MDSC
  • tumor immunity
  • immunotherapies
  • TME

Published Papers (1 paper)

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Research

20 pages, 2707 KiB  
Article
Macrophage Plasticity and Function in the Lung Tumour Microenvironment Revealed in 3D Heterotypic Spheroid and Explant Models
by Lauren Evans, Kate Milward, Richard Attanoos, Aled Clayton, Rachel Errington and Zsuzsanna Tabi
Biomedicines 2021, 9(3), 302; https://doi.org/10.3390/biomedicines9030302 - 15 Mar 2021
Cited by 9 | Viewed by 3300
Abstract
In non-small cell lung cancer (NSCLC), stroma-resident and tumour-infiltrating macrophages may facilitate an immunosuppressive tumour microenvironment (TME) and hamper immunotherapeutic responses. Analysis of tumour-associated macrophage (TAM) plasticity in NSCLC is largely lacking. We established a novel, multi-marker, dual analysis approach for assessing monocyte-derived [...] Read more.
In non-small cell lung cancer (NSCLC), stroma-resident and tumour-infiltrating macrophages may facilitate an immunosuppressive tumour microenvironment (TME) and hamper immunotherapeutic responses. Analysis of tumour-associated macrophage (TAM) plasticity in NSCLC is largely lacking. We established a novel, multi-marker, dual analysis approach for assessing monocyte-derived macrophage (Mφ) polarisation and M1/M2 phenotypic plasticity. We developed a flow cytometry-based, two-marker analysis (CD64 and CD206) of CD14+ cells. The phenotype and immune function of in vitro-induced TAMs was studied in a heterotypic spheroid and tumour-derived explant model of NSCLC. Heterotypic spheroids and NSCLC explants skewed Mφs from an M1- (CD206loCD64hi) to M2-like (CD206hiCD64lo) phenotype. Lipopolysaccharide (LPS) and IFNγ treatment reversed M2-like Mφ polarisation, indicating the plasticity of Mφs. Importantly, antigen-specific CD8+ T cell responses were reduced in the presence of tumour explant-conditioned Mφs, but not spheroid-conditioned Mφs, suggesting explants are likely a more relevant model of the immune TME than cell line-derived spheroids. Our data indicates the importance of multi-marker, functional analyses within Mφ subsets and the advantages of the ex vivo NSCLC explant model in immunomodulation studies. We highlight the plasticity of the M1/M2 phenotype using the explant model and provide a tool for studying therapeutic interventions designed to reprogram M2-like Mφ-induced immunosuppression. Full article
(This article belongs to the Special Issue Targeting Myeloid Cells to Shape Tumor)
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