Cited by 2,376Immune cells in cancerCancer Immunotherapy and BiomarkersTGF-β signaling in diseases

The tumor microenvironment and its role in promoting tumor growth

Open access
Whiteside, T L·2008·Oncogene

Abstract

The tumor microenvironment is created by the tumor and dominated by tumor-induced interactions. Although various immune effector cells are recruited to the tumor site, their anti-tumor functions are downregulated, largely in response to tumor-derived signals. Infiltrates of inflammatory cells present in human tumors are chronic in nature and are enriched in regulatory T cells (T(reg)) as well as myeloid suppressor cells (MSC). Immune cells in the tumor microenvironment not only fail to exercise antitumor effector functions, but they are co-opted to promote tumor growth. Sustained activation of the NF-kappaB pathway in the tumor milieu represents one mechanism that appears to favor tumor survival and drive abortive activation of immune cells. The result is tumor escape from the host immune system. Tumor escape is accomplished through the activation of one or several molecular mechanisms that lead to inhibition of immune cell functions or to apoptosis of anti-tumor effector cells. The ability to block tumor escape depends on a better understanding of cellular and molecular pathways operating in the tumor microenvironment. Novel therapeutic strategies that emerge are designed to change the pro-tumor microenvironment to one favoring acute responses and potent anti-tumor activity.

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Crossref · 10.1038/onc.2008.271

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  • Tumor initiation and progression are not governed solely by genetic mutations but are significantly influenced by the dynamic interplay between tumor cells and their surrounding microenvironment.

    “It is now widely accepted that tumor initiation and progression are not governed solely by genetic mutations but are significantly influenced by the dynamic interplay between tumor cells and their surrounding microenvironment.”

    From Modeling Tumor Microenvironment Complexity In Vitro: Spheroids as Physiologically Relevant Tumor Models and Strategies for Their Analysis (2025) · cites this paper as [20]

    The Introduction says the tumor microenvironment exerts a key influence on tumor progression, and the Conclusions describe cellular interactions that support tumor growth. The paper also associates inflammation with tumor development, but the cited passages do not clearly establish that the microenvironment influences tumor initiation, as the sentence claims. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • The tumor microenvironment comprises a complex network of cellular, acellular, and immune components.

    “This surrounding landscape—referred to as the tumor microenvironment (TME)—comprises a complex network of cellular, acellular, and immune components [5,20,21].”
  • Cancer-associated fibroblasts (CAFs) are a major cellular component of the tumor microenvironment in most solid cancers.

    “Cancer-associated fibroblasts (CAFs) are a major cellular component of tumor microenvironment in most solid cancers.”
  • CAFs comprise the majority of cell types within the TME, and their reciprocal interactions with cancer cells are well documented.

    “CAFs comprise the majority of cell types within the TME, and their reciprocal interactions with cancer cells have been well documented (Whiteside, 2008; Hazlehurst et al., 2003; Karnoub et al., 2007).”
  • Paracrine signals from cancer cells can recruit and activate CAFs within the TME.

    “Accumulating evidence suggests that paracrine signals from cancer cells can both recruit and activate CAFs within the TME, and contribute to their activation (Whiteside, 2008; Liao et al., 2009; Orimo et al., 2005; Chung et al., 2006).”

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Authors
Whiteside, T. L.
Affiliations
University of Pittsburgh (US)
Corresponding author
Whiteside, T L
Venue
Oncogene
Published
2008-10-06
Volume
27
Issue
45
Pages
5904-5912
ISSN
  • 0950-9232 (ISSN-L)
  • 1476-5594
OpenAlex
W2126882378
Cited by
2,376
References
85
Citations by year
2026: 88 · 2025: 126 · 2024: 187 · 2023: 269 · 2022: 288 · 2021: 302 · 2020: 190 · 2019: 145 · 2018: 133 · 2017: 106 · 2016: 101 · 2015: 80 · 2014: 58 · 2013: 87 · 2012: 57
FWCI
3.87
Type
journal article
Language
en
Open access
Locations
  • Oncogene (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (5p01ca109688-05)
  • National Cancer Institute (P0-1 CA109688)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immune cells in cancer
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › TGF-β signaling in diseases
Keywords
tumor microenvironment, tumor growth, immune evasion, regulatory T cells, myeloid-derived suppressor cells, NF-κB signaling, tumor-infiltrating immune cells, antitumor immunity, immune checkpoint blockade, cancer immunotherapy
MeSH terms
Animals, Cell Communication, Humans, Immunotherapy, Inflammation, Models, Biological, Neoplasms, Tumor Escape, Extracellular Fluid, Tumor Burden, Cell Proliferation

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