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Published on: June 27, 2025
Tertiary lymphoid structures in the microenvironment of colorectal cancer: exploring new therapeutic targets
Nan-Nan Dai1, Man-Yi Hu1, Jian-Ping Wang1
1Department of Colorectal and Anal Surgery, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, 321000, Zhejiang Province, China.
Abstract:
Immunotherapy has shown limited efficacy in colorectal cancer (CRC), necessitating the urgent identification of novel immunotherapeutic targets to address this challenge. Tertiary lymphoid structures (TLSs) are complex immune structures that spontaneously form within and outside of the tumor microenvironment, resembling secondary lymphoid organs. The formation of TLS formation dynamically adapts to the tumor microenvironment, with their immune function maintained by resident immune cells and cytokine networks. TLS develops antitumor immune competence following dynamic reorganization of their cellular components and proportions, although the precise mechanistic underpinnings remain to be fully characterized. Numerous studies have demonstrated that TLS can modulate the immune status of CRC, potentially enhancing the efficacy of immunotherapy. Currently, the clinical setting lacks appropriate immunological markers to assess immunotherapy outcomes, and TLS may offer a solution to this limitation. This article will review current research on TLS as a novel therapeutic target in the immunotherapy of malignant colorectal tumors.
Insights
Tertiary lymphoid structures (TLSs) show promise for improving colorectal cancer (CRC) immunotherapy. These immune structures may serve as biomarkers and therapeutic targets to enhance treatment efficacy in CRC patients.
Area of Science:
- Immunology
- Oncology
- Cancer Research
Background:
- Immunotherapy efficacy in colorectal cancer (CRC) is limited, highlighting the need for new therapeutic targets.
- Tertiary lymphoid structures (TLSs) are immune aggregates mimicking secondary lymphoid organs within the tumor microenvironment.
- TLS dynamically adapt to the tumor microenvironment, influencing antitumor immunity through cellular and cytokine interactions.
Purpose of the Study:
- To review current research on Tertiary Lymphoid Structures (TLSs) as a novel therapeutic target in colorectal cancer (CRC) immunotherapy.
- To explore the potential of TLS as immunological markers for assessing immunotherapy outcomes in CRC.
Main Methods:
- Literature review of current research on TLS in CRC immunotherapy.
- Analysis of studies demonstrating TLS's role in modulating the CRC immune microenvironment.
- Examination of TLS's potential as predictive biomarkers for immunotherapy response.
Main Results:
- TLS formation is dynamic and influences the immune status of CRC.
- TLS can enhance the efficacy of immunotherapy in colorectal cancer.
- TLS may serve as crucial immunological markers for predicting immunotherapy outcomes.
Conclusions:
- Tertiary Lymphoid Structures (TLSs) represent a promising novel therapeutic target for enhancing colorectal cancer (CRC) immunotherapy.
- Further research into TLS mechanisms and their role in CRC is warranted to fully exploit their therapeutic potential.
- TLS could provide valuable biomarkers for patient stratification and monitoring treatment response in CRC immunotherapy.
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