immunological tolerance
C2/TechnicalTechnical/Scientific
Definition
Meaning
A state in which an organism's immune system does not react destructively to a specific substance or tissue that is normally an immune target.
A critical physiological mechanism preventing harmful immune responses against the body's own tissues (self-tolerance) or against harmless environmental antigens. In medicine, it can also refer to a therapeutic goal of inducing non-responsiveness to allergens, transplanted organs, or autoantigens.
Linguistics
Semantic Notes
Typically used as a noun phrase. In immunology, 'tolerance' has a specific meaning distinct from its general usage (patience, endurance). It describes an active state of unresponsiveness, not merely a passive absence of response.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or spelling differences. The phrase is identically formed and spelled in both variants.
Connotations
Purely scientific/medical connotations in both variants.
Frequency
Equally rare in general discourse and equally common in specialist immunology contexts in both regions.
Vocabulary
Collocations
Grammar
Valency Patterns
Immunological tolerance TO [antigen/tissue]Immunological tolerance AGAINST [self-antigen]Immunological tolerance FOR [transplant]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Not used.
Academic
Core concept in immunology, physiology, and medical research papers.
Everyday
Virtually never used in everyday conversation.
Technical
Fundamental term in clinical immunology, transplant medicine, allergy research, and autoimmune disease therapeutics.
Examples
By Part of Speech
verb
British English
- The treatment aims to tolerise the patient's immune system to the donor antigens.
- The body must learn to tolerate its own proteins.
American English
- The therapy is designed to tolerize the patient's immune system to the allergen.
- The mechanism involves tolerizing T-cells in the periphery.
adverb
British English
- The cells reacted tolerogenically to the stimulus.
- The antigen was presented tolerogenically.
American English
- The treatment functioned tolerogenically.
- The protocol was designed to act tolerogenically.
adjective
British English
- The tolerogenic vaccine showed promising results.
- They studied the tolerogenic properties of the antigen.
American English
- The tolerogenic regimen prevented graft rejection.
- Research focused on tolerogenic dendritic cells.
Examples
By CEFR Level
- A breakdown in immunological tolerance can lead to autoimmune diseases like rheumatoid arthritis.
- The research team successfully induced immunological tolerance to the peanut allergen in murine models, a significant step towards a cure for food allergies.
- Central immunological tolerance occurs primarily in the thymus, where self-reactive T-cells are eliminated during development.
Learning
Memory Aids
Mnemonic
Think of a tolerant person who doesn't react aggressively. The immune system is 'tolerant' when it learns NOT to attack specific things it encounters.
Conceptual Metaphor
IMMUNE SYSTEM IS A SECURITY FORCE (Tolerance is the security force's 'approved list' of entities it is trained to ignore).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating 'tolerance' as 'толерантность' in its modern social sense. The closer equivalent is 'иммунологическая толерантность' or specifically 'переносимость'.
- Do not confuse with 'immunity' ('иммунитет'). Tolerance is the lack of immune response, while immunity is the presence of a protective response.
Common Mistakes
- Using 'immunological tolerance' interchangeably with 'drug tolerance' or 'alcohol tolerance'.
- Misspelling as 'immunologic tolerance' (acceptable but less common variant).
- Incorrect preposition: 'immunological tolerance of' (less standard) instead of 'immunological tolerance to'.
Practice
Quiz
What is the primary consequence of a loss of immunological tolerance to self-antigens?
FAQ
Frequently Asked Questions
No. Immunodeficiency is a broad weakness in the immune system's ability to respond. Immunological tolerance is a specific, active non-response to a particular antigen, while the rest of the immune system functions normally.
Yes. While central tolerance is established during immune cell development, peripheral tolerance can be acquired later in life. This is the principle behind some allergy treatments (desensitisation) and experimental transplant therapies.
Central tolerance occurs in primary lymphoid organs (bone marrow, thymus) where newly formed self-reactive lymphocytes are deleted. Peripheral tolerance occurs in peripheral tissues and involves mechanisms like anergy, regulation by suppressor cells, and immune privilege to control mature lymphocytes that escaped central deletion.
The foetus carries paternal antigens foreign to the mother. Immunological tolerance mechanisms (involving specialised cells and cytokines at the maternal-foetal interface) are crucial to prevent the mother's immune system from rejecting the semi-allogeneic foetus.