- null cell
- null cell 'nəl- n a lymphocyte in the blood that does not have on its surface the receptors typical of either mature B cells or T cells
Medical dictionary. 2011.
null cell
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Null cell — A null cell is a large granular lymphocyte without surface markers or membrane associated proteins from B lymphocytes or T lymphocytes. Natural killer cells are usually null cells with surface marker CD 16 which bind to the Fc portion of the IgG … Wikipedia
null cell — Lymphocytes lacking typical markers of T or B cells capable of lysing a variety of tumour or virus infected cells without obvious antigenic stimulation, also effect antibody dependent cell lysis, and in humans carry CD16 marker … Dictionary of molecular biology
null-cell adenoma — a pituitary adenoma whose cells give negative results on tests for staining and hormone secretion; although classically they were considered to be composed of sparsely granulated or degranulated (nonfunctioning) cells, some contain functioning… … Medical dictionary
Cell — The basic structural and functional unit in people and all living things. Each cell is a small container of chemicals and water wrapped in a membrane. Each cell in the human body there are 100 trillion cells in each of us contains the entire… … Medical dictionary
Hematopoietic stem cell — HSC=Hematopoietic stem cell, Progenitor=Progenitor cell, L blast=Lymphoblast, Lymphocyte, Mo blast=Monoblast, Monocyte, Myeloblast … Wikipedia
Cytotoxic T cell — Antigen presentation stimulates T cells to become either cytotoxic CD8+ cells or helper CD4+ cells. A cytotoxic T cell (also known as TC, Cytotoxic T Lymphocyte, CTL, T Killer cell, cytolytic T cell, CD8+ T cells or killer T cell) belongs to a… … Wikipedia
Natural killer cell — Latin lymphocytus K Code TH H2.00.04.1.02006 Natural killer cells (or NK cells) are a type of cytotoxic lymphocyte that constitute a major component of the innate immune system. NK cells play a major role in the rejection of … Wikipedia
White blood cell — White Blood Cells redirects here. For the album by The White Stripes, see White Blood Cells (album). White blood cell A scanning electron microscope image of normal circulating human blood. In addition to the irregularly shaped leukocytes, both… … Wikipedia
Natural Killer T cell — Natural killer T (NKT) cells are a heterogeneous group of T cells that share properties of both T cells and natural killer (NK) cells. Many of these cells recognize the non polymorphic CD1d molecule, an antigen presenting molecule that binds self … Wikipedia
Memory B cell — For other uses, see Memory cell (disambiguation). B lymphocytes are the cells of the immune system that make antibodies to invading pathogens like viruses. They form memory cells that remember the same pathogen for faster antibody production in… … Wikipedia
