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Lymphoid cells and tissues are integral to the immune system, which is crucial in maintaining our body's defense against harmful pathogens. They form the building blocks of lymphoid organs, which include the spleen, thymus, and lymph nodes.
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Primary lymphoid organs are pivotal in the formation, development, and maturation of lymphocytes, the white blood cells that serve as the backbone of our immune system. This crucial function underscores their fundamental role in maintaining our overall health and immunity. The two primary lymphoid organs of prime importance are the red bone marrow and the thymus.
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Tertiary lymphoid structures in cancer and beyond.

Marie-Caroline Dieu-Nosjean1, Jérémy Goc1, Nicolas A Giraldo1

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Trends in Immunology
|December 3, 2014
PubMed
Summary

Tertiary lymphoid structures (TLS) are lymph node-like formations in tissues that aid adaptive immunity. This review explores their beneficial or detrimental roles in chronic infection, autoimmunity, and cancer, impacting patient prognosis and therapy.

Keywords:
cancerimmunotherapyprognostic biomarkertertiary lymphoid structure

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Area of Science:

  • Immunology
  • Pathology
  • Oncology

Background:

  • Tertiary lymphoid structures (TLS) are organized lymphoid aggregates resembling lymph nodes, found in non-lymphoid tissues during inflammation, infection, or cancer.
  • TLS comprise key components of adaptive immunity, including T cell zones, germinal centers, and high endothelial venules (HEV).

Purpose of the Study:

  • To review the multifaceted roles of TLS in chronic infection, autoimmunity, and cancer.
  • To evaluate whether TLS exert beneficial or detrimental effects in various disease contexts.
  • To explore the prognostic significance of TLS in tumors and their potential as therapeutic targets.

Main Methods:

  • Literature review and synthesis of existing research on Tertiary Lymphoid Structures.
  • Analysis of studies investigating the presence and composition of TLS in different pathological conditions.
  • Examination of the correlation between TLS and patient outcomes in cancer.

Main Results:

  • TLS are consistently observed in chronic inflammatory and autoimmune diseases, as well as in tumors.
  • The presence and organization of TLS can influence disease progression and patient prognosis, with varied effects depending on the context.
  • TLS are implicated in orchestrating local immune responses, suggesting a role in therapeutic interventions.

Conclusions:

  • Tertiary lymphoid structures play a critical role in modulating immune responses in pathological settings.
  • Understanding the dual role of TLS in disease is crucial for developing targeted immunotherapies.
  • TLS represent a promising area for future research in cancer treatment and management of autoimmune diseases.