Journal
FRONTIERS IN IMMUNOLOGY
Volume 8, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fimmu.2017.01830
Keywords
tertiary lymphoid structures; cancer immunotherapy; high endothelial venules; lymphoid neogenesis; tumor microenvironment
Categories
Funding
- Cancer Research UK
- programme grant from Cancer Research UK [C16731/A21200]
- programme grants from Wellcome Trust [094511/Z/10/Z]
- Medical Research Council UK [MR/L008742/1]
- Arthritis Research UK Career Development Fellowship [20305]
- Cancer Research UK [21200, 24416] Funding Source: researchfish
- Medical Research Council [MR/L008742/1] Funding Source: researchfish
- Versus Arthritis [20305] Funding Source: researchfish
- MRC [MR/L008742/1] Funding Source: UKRI
- Wellcome Trust [094511/Z/10/Z] Funding Source: Wellcome Trust
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Secondary lymphoid organs are integral to initiation and execution of adaptive immune responses. These organs provide a setting for interactions between antigen-specific lymphocytes and antigen-presenting cells recruited from local infected or inflamed tissues. Secondary lymphoid organs develop as a part of a genetically preprogrammed process during embryogenesis. However, organogenesis of secondary lymphoid tissues can also be recapitulated in adulthood during de novo lymphoid neogenesis of tertiary lymphoid structures (TLSs). These ectopic lymphoid-like structures form in the inflamed tissues afflicted by various pathological conditions, including cancer, autoimmunity, infection, or allograft rejection. Studies are beginning to shed light on the function of such structures in different disease settings, raising important questions regarding their contribution to progression or resolution of disease. Data show an association between the tumor-associated TLSs and a favorable prognosis in various types of human cancer, attracting the speculation that TLSs support effective local antitumor immune responses. However, definitive evidence for the role for TLSs in fostering immune responses in vivo are lacking, with current data remaining largely correlative by nature. In fact, some more recent studies have even demonstrated an immunosuppressive, tumor-promoting role for cancer-associated TLSs. In this review, we will discuss what is known about the development of cancer-associated TLSs and the current understanding of their potential role in the antitumor immune response.
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