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The alloresponse.

M P Hernandez-Fuentes¹, R J Baker, R I Lechler

¹Department of Immunology, Imperial College of Science, Technology and Medicine, Hammersmith Hospital, London, UK.

Reviews in Immunogenetics

|March 21, 2001

Summary

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The alloresponse involves recognizing foreign antigens and mounting immune attacks. Understanding major and minor histocompatibility antigens is crucial for transplant success and managing rejection.

Area of Science:

Immunology
Transplantation immunology

Background:

The alloresponse comprises antigen recognition (allorecognition) and subsequent immune effector mechanisms.
Histocompatibility antigens, including major histocompatibility complex (MHC) and minor histocompatibility antigens (mHAgs), are key targets.

Purpose of the Study:

To elucidate the components of the alloresponse.
To discuss the clinical significance of MHC and mHAGs in transplantation.

Main Methods:

Review of immunological principles of alloresponses.
Discussion of T cell and B cell roles in allorecognition and effector functions.

Main Results:

Allorecognition involves direct or indirect presentation of foreign antigens.

Related Experiment Videos

CD4+ T cells orchestrate immune responses, attracting effector cells and interacting with B cells.

Responses to mHAGs, though weaker than MHC responses, are clinically significant in bone marrow transplants.

Conclusions:

The alloresponse is a complex process involving recognition and effector mechanisms.
Understanding these mechanisms is vital for managing transplant rejection, including hyperacute, acute, and chronic forms.