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Updated: May 17, 2026

In Vitro Assay to Study Tumor-macrophage Interaction
Published on: August 1, 2019
Anti-tumour strategies aiming to target tumour-associated macrophages
Xiaoqiang Tang1, Chunfen Mo, Yongsheng Wang
1Department of Geriatrics, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Sichuan University, Chengdu, China.
Abstract:
Tumour-associated macrophages (TAMs) represent a predominant population of inflammatory cells that present in solid tumours. TAMs are mostly characterized as alternatively activated M2-like macrophages and are known to orchestrate nearly all stages of tumour progression. Experimental investigations indicate that TAMs contribute to drug-resistance and radio-protective effects, and clinical evidence shows that an elevated number of TAMs and their M2 profile are correlated with therapy failure and poor prognosis in cancer patients. Recently, many studies on TAM-targeted strategies have made significant progress and some pilot works have achieved encouraging results. Among these, connections between some anti-tumour drugs and their influence on TAMs have been suggested. In this review, we will summarize recent advances in TAM-targeted strategies for tumour therapy. Based on the proposed mechanisms, those strategies are grouped into four categories: (i) inhibiting macrophage recruitment; (ii) suppressing TAM survival; (iii) enhancing M1-like tumoricidal activity of TAMs; (iv) blocking M2-like tumour-promoting activity of TAMs. It is desired that further attention be drawn to this research field and more effort be made to promote TAM-targeted tumour therapy.
Insights
Tumour-associated macrophages (TAMs) are key players in cancer progression and therapy resistance. Targeting TAMs, by inhibiting recruitment, survival, or modulating their activity, offers promising new avenues for cancer treatment.
Area of Science:
- Immunology
- Oncology
- Cancer Research
Background:
- Tumour-associated macrophages (TAMs) are prevalent inflammatory cells in solid tumours.
- TAMs, predominantly M2-like, drive tumour progression, drug resistance, and radio-protection.
- High TAM numbers and M2 profiles correlate with cancer therapy failure and poor prognosis.
Purpose of the Study:
- To review recent advances in TAM-targeted strategies for cancer therapy.
- To categorize TAM-targeting strategies based on their proposed mechanisms.
- To highlight the potential of TAM-targeted approaches in improving cancer treatment outcomes.
Main Methods:
- Literature review of recent studies on TAM-targeted cancer therapy.
- Categorization of strategies into four main groups: inhibiting recruitment, suppressing survival, enhancing M1 activity, and blocking M2 activity.
- Analysis of proposed mechanisms and experimental/clinical evidence for TAM-targeting strategies.
Main Results:
- Significant progress has been made in developing TAM-targeted strategies.
- Several pilot studies have shown encouraging results in preclinical and clinical settings.
- Connections between anti-tumour drugs and their influence on TAMs are increasingly recognized.
Conclusions:
- TAM-targeted strategies represent a promising frontier in cancer therapy.
- Categorizing strategies aids in understanding their diverse mechanisms of action.
- Further research and development are crucial to translate TAM-targeting therapies into effective clinical treatments.
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