lymphokine-activated killer cell
Very Low / TechnicalFormal / Scientific / Medical
Definition
Meaning
A white blood cell that has been treated in a laboratory with lymphokines to enhance its ability to kill cancer cells and cells infected with viruses.
A type of cytotoxic lymphocyte used in adoptive cell transfer immunotherapy, where a patient's own natural killer (NK) cells or T cells are harvested, expanded and activated ex vivo with cytokines (like interleukin-2) before being infused back into the patient to target tumours.
Linguistics
Semantic Notes
The term is highly technical and is almost exclusively used in immunology, oncology, and cell therapy contexts. It is a compound noun with a fixed order. It is often abbreviated to 'LAK cell' or 'LAK' in technical writing.
Dialectal Variation
British vs American Usage
Differences
No significant spelling or usage differences. Pronunciation differences are minimal, following standard BrE/AmE patterns for the constituent words.
Connotations
None beyond the strict scientific/medical meaning.
Frequency
Equally rare and specialised in both varieties, found only in relevant medical literature and discourse.
Vocabulary
Collocations
Grammar
Valency Patterns
The researchers generated lymphokine-activated killer cells from the patient's blood.The therapy utilises lymphokine-activated killer cells to target the tumour.LAK cells exhibit cytotoxicity against.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Only in the context of biotech or pharmaceutical company reports, investment summaries for immunotherapy.
Academic
Primary context. Used in immunology, oncology, and medical research papers, textbooks, and conference presentations.
Everyday
Virtually never used. A doctor might use simplified terms like 'boosted immune cells' when explaining to a patient.
Technical
The default context. Precise term used in laboratory protocols, clinical trial documents, and specialist discussions.
Examples
By Part of Speech
verb
British English
- The team will lymphokine-activate the killer cells prior to infusion.
- We are attempting to lymphokine-activate the harvested lymphocytes.
American English
- The protocol requires lymphokine-activating the killer cells.
- They successfully lymphokine-activated the patient's T-cells.
adjective
British English
- The lymphokine-activated killer cell therapy showed promise.
- We observed a lymphokine-activated killer cell response.
American English
- The lymphokine-activated killer cell infusion was completed.
- Lymphokine-activated killer cell activity was measured.
Examples
By CEFR Level
- Doctors are using special cells to fight cancer.
- A new cancer treatment involves taking a patient's immune cells and making them stronger in a lab.
- Immunotherapy, such as the use of lymphokine-activated killer (LAK) cells, represents a significant advance in personalised cancer treatment.
Learning
Memory Aids
Mnemonic
Imagine a LYMPHocyte (immune cell) is activated by a KIne (key) and becomes a professional KILLER for cancer CELLs: Lympho-KINE-activated KILLER CELL.
Conceptual Metaphor
THE BODY'S ARMY: A 'soldier cell' taken to boot camp (the lab), given special weapons training (lymphokines), and sent back to the front lines (the patient's body) to assassinate specific targets (cancer cells).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid a word-for-word translation that might sound like 'lymphatic' or 'lymph node'. 'Lymphokine' is a specific biochemical term.
- The word order is fixed; translating it as 'killer cell activated by lymphokines' is conceptually accurate but loses the standardised compound noun form.
- 'Killer cell' is a technical term (киллерная клетка), not necessarily implying 'murderer' in a criminal sense.
Common Mistakes
- Misspelling as 'limphokine' or 'lymphokyne'.
- Incorrect hyphenation or word order, e.g., 'lymphokine activated-killer cell'.
- Using it as a general term for any immunotherapy cell (e.g., confusing it with CAR-T cells).
- Pronouncing 'lymphokine' with stress on the wrong syllable (e.g., lym-PHO-kine).
Practice
Quiz
What is the primary function of a lymphokine-activated killer (LAK) cell?
FAQ
Frequently Asked Questions
No. While both are forms of adoptive cell therapy, LAK cells are typically natural killer (NK) cells or T cells activated with cytokines like IL-2. CAR-T cells are T cells that are genetically engineered to express a chimeric antigen receptor (CAR) targeting a specific protein on cancer cells.
A lymphokine is a type of cytokine (a signalling protein) secreted by lymphocytes, especially T-cells. In this context, it refers to cytokines (like interleukin-2) used to stimulate and 'activate' the killer cells in the laboratory.
LAK cell therapy was pioneered earlier but has been largely superseded by more targeted immunotherapies like CAR-T and checkpoint inhibitors in many cancer types. However, it is still an area of research, particularly in combination with other treatments.
Standard pronunciation is /ˈlɪmfəʊkaɪn/ (BrE) or /ˈlɪmfoʊkaɪn/ (AmE). Stress the first syllable: LIM-foh-kine. Think of 'lymph' (as in lymphatic) + 'kine' (sounding like 'kind' without the 'd').