Dictionary » K » Killer cell

Killer cell

Definition

noun

(1) A type of T cell that does not express markers of either T or B-cell lineage, but may possess fc receptors for immunoglobulin g. It functions by killing target cell through antibody-dependent cell-mediated cytotoxicity or through perforin, killing cells without prior sensitization (hence, the name).

(2) Mammalian cell that is capable of lysing antibody-coated target cell.


Supplement

This type of cell attacks tumor cells and infected cells by releasing chemicals that are toxic to the cell, resulting to cell death of the target cell.


Variants:


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Intrinsic apoptosis in erythrocytes

Hi fellow cell biologists! - With a lack of mitochondria, can red blood cells perform intrinsic apoptosis ... c to attach to a CARD domain and assemble the apoptosome? Or are they dependent on killer lymphocytes to bind via the fas ligand and activate procaspase 8 or 10 in extrinsic ...

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by billyfisher100
Fri Apr 27, 2012 10:04 pm
 
Forum: Cell Biology
Topic: Intrinsic apoptosis in erythrocytes
Replies: 3
Views: 3676

Re:

There are two things: K and NK cells, the first one is a killing cell and the second one - a natural killing cell. ... u have said right you should understand the difference first between the killer and natural killer cells first. T-lymphocytes are can be distinguished from ...

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by greatmicrobiologist
Thu Aug 25, 2011 10:23 am
 
Forum: Cell Biology
Topic: Killer Cells vs. Cytotoxic Cells
Replies: 9
Views: 31988

Killer Cells vs. Cytotoxic Cells

... are typically defined by their surface molecule CD8 (so called CD8+ T cells). They are close kin to the CD4+ helper T cells. Both of these cell ... a foreign antigen on a cell's surface, it kills this cells - hence the 'killer cell' name (this is to prevent viral infection or cancer from spreading). ...

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by biohazard
Mon May 02, 2011 8:23 am
 
Forum: Cell Biology
Topic: Killer Cells vs. Cytotoxic Cells
Replies: 9
Views: 31988

More general biology questions..

... stop? 3. Auxins, at high concentrations, stimulate the elongation of cells a plant's stems, but at high concentrations, inhibit growth of roots. ... response) - is this true? 12. Are macrophages and phagocytes nautral killer cells? Wikipedia says that "NK cells are activated in response ...

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by freedompeace
Fri Apr 15, 2011 12:30 pm
 
Forum: Cell Biology
Topic: More general biology questions..
Replies: 1
Views: 5810

Discuss the Possibility that the Earth is a Supreme Being

Compare the Earth with a mother cell. Because of technological devlopment, there are no suprises that lives have hieracrchies. ... layer is the key of her life cycles. In the whole, desertification is the real killer. It is a steady approach of aging of our planet Earth, a Supreme Being without ...

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by kk23wong
Tue Jul 06, 2010 5:29 am
 
Forum: General Discussion
Topic: Discuss the Possibility that the Earth is a Supreme Being
Replies: 0
Views: 2898
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