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Liver-Mediated Adaptive Immune Tolerance.

Meijuan Zheng1, Zhigang Tian2,3

  • 1Department of Clinical Laboratory, First Affiliated Hospital of Anhui Medical University, Hefei, China.

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|December 3, 2019
PubMed
Summary
This summary is machine-generated.

The liver promotes immune tolerance, preventing harmful responses but causing liver diseases. Strategies like immunotherapy can overcome this tolerance for better health outcomes.

Keywords:
T cell dysfunctionimmune regulationinnate cell dysfunctionliver diseasesliver toleranceliver-draining lymph node

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Area of Science:

  • Immunology
  • Hepatology
  • Transplantation

Background:

  • The liver exhibits unique immunological tolerance, limiting responses to dietary antigens and bacterial products.
  • Persistent infections in the liver often lead to immune tolerance, a critical characteristic of hepatic immunity.
  • The liver's microenvironment actively induces tolerogenic adaptive immune cells, promoting self-tolerance.

Purpose of the Study:

  • To review the mechanisms of hepatic adaptive immune tolerance.
  • To explore liver diseases resulting from these tolerance mechanisms.
  • To discuss therapeutic strategies for overcoming hepatic immune tolerance.

Main Methods:

  • Review of existing literature on hepatic immunology and immune tolerance.
  • Analysis of mechanisms leading to T cell regulation (deletion, exhaustion, inhibition) in the liver.
  • Examination of the link between hepatic tolerance and liver disease pathogenesis.

Main Results:

  • Hepatic immune tolerance involves mechanisms like clonal deletion, exhaustion, and inhibition of peripheral T cells.
  • These tolerance mechanisms are implicated in the development of most liver diseases.
  • Modulating hepatic innate immunity and employing checkpoint immunotherapy can enhance protective adaptive immune responses.

Conclusions:

  • Hepatic immune tolerance, while protective against self-antigens, contributes significantly to liver disease.
  • Understanding these tolerance mechanisms is crucial for developing effective treatments.
  • Targeted immunotherapies and immune cell modulation offer promising therapeutic avenues for liver diseases.