Self-tolerance Overview

Principles

Definition

Self-tolerance is an academic concept in psychology referring to an individual's capacity to internally manage or accept challenging psychological states, difficult experiences, or perceived shortcomings related to the self. This concept investigates the mechanisms, boundaries, and consequences of this internal capacity, recognizing that it operates within a functional range beyond which it may become detrimental. The significance of self-tolerance lies in its relevance to psychological resilience, emotional regulation, and clinical interventions aimed at fostering self-acceptance and adaptive coping strategies.

Ontological type

Clinical Applications

Core Mechanisms

Assessment Measures

Key developments

Key Figures

Thymus and Antigen Context era

Baruj Benacerraf [1], Harvard University [3], and Stanford University [4] were central to the Thymus and Antigen Context era. His work highlighted that PHAGOCYTOSIS OF THE ANTIGEN, A CRUCIAL STEP IN THE INDUCTION OF THE PRIMARY RESPONSE [5], and he studied the termination of tolerance to BSA with DNP-BSA in rabbits: relative affinities of the antibodies for the immunizing and the paralysing antigens [6], illustrating how antigen context and antibody interactions shape tolerogenic outcomes in this era. William O. Weigle [2] contributed to this era across several research settings, and his papers—Immunologic Unresponsiveness to Heterologous Serum Proteins Induced in Adult Mice and Transfer of the Unresponsive State [7], The Immune Response of BSA Tolerant Rabbits to Injections of BSA Following the Termination of the Tolerant State [8], and The Immune Response of Rabbits Tolerant to One Protein Conjugate Following the Injection of Related Protein Conjugates [9]—reflect the pattern. Together, these contributions traced how antigen context and thymic processing interface with tolerance mechanisms, laying groundwork for understanding self-tolerance in the thymus.

Central Negative Selection era

Philippa Marrack [1] worked with Massachusetts Institute of Technology [3] and The University of Texas Southwestern Medical Center [4] during the Central Negative Selection era. Her key contributions include demonstrating T cell tolerance by clonal elimination in the thymus [6], describing antigen-inducible, H-2–restricted, interleukin-2-producing T cell hybrids [7], and identifying a role for clonal inactivation in tolerance to Mis-1a [8], collectively establishing deletional pruning and cytokine cues as central determinants of thymic fate in this era. Rolf M. Zinkernagel [2] was associated with The University of Texas Southwestern Medical Center [4] and University of California, San Diego [5] during this era. His papers on tolerance induction in double-specific T-cell receptor transgenic mice varies with antigen [9], on the thymus in the differentiation of H-2 self-recognition by T cells: evidence for dual recognition [10], and cytotoxic T cells learn specificity for self H–2 during differentiation in the thymus [11] articulated how central tolerance arises from thymic selection and antigen-driven deletion.

Regulatory T Cell Networks era

Shimon Sakaguchi [1], associated with Stanford University [3] and Johns Hopkins University [4], helped shape regulatory T cell biology in this era. His key contributions include the 2003 paper Control of Regulatory T Cell Development by the Transcription Factor Foxp3 [7], which established Foxp3 as a master regulator of Treg development, and the 2008 paper CTLA-4 Control over Foxp3 + Regulatory T Cell Function [8], highlighting CTLA-4's role in Treg suppression and tissue stability. Shohei Hori [2], with affiliations at Instituto Gulbenkian de Ciência [5] and University of Oxford [6], contributed to the Foxp3-centered regulatory program in this era. His sole 2003 paper, Control of Regulatory T Cell Development by the Transcription Factor Foxp3 [7], helped establish Foxp3 as essential for regulatory T cell development and lineage commitment, underscoring Foxp3’s central role in self-tolerance networks.