| NCA | National Certification Agency; National Council on Aging; National Council on Alcoholism; neurocircu... |
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| NCR | National Research Council; neutrophil chemotactic response; no carbon required; nuclear/cytoplasmic ... |
| NAP | nasion, point A, pogonion [convexity or concavity of the facial profile]; nerve action potential; ne... |
| PAF | paroxysmal atrial fibrillation; peroxisomal assembly factor; phosphodiesterase-activating factor; pl... |
| SF | Sabin-Feldman [test]; safety factor; salt-free; scarlet fever; screen film; seminal fluid; serosal f... |
| segmented neutrophil | A fully matured neutrophil that has at least 2 (and as many as 5) distinct lobes in the nucleus and manifests active ameboid motion. Synonym: mature neutrophil. (05 Mar 2000) |
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| hypersegmented neutrophil | An aged and degenerated neutrophil in which there may be 6 to 10 lobes in the nucleus. Immature neutrophil, a young neutrophil; the term is usually used with reference to stab neutrophil's (or other "juvenile" neutrophil's), neutrophilic granulocytes in which the nucleus is indented but not distinctly segmented. Juvenile neutrophil, any cell of the granulocytic series in which the neutrophilic granules are recognizable and the nucleus is indented (the first phase of segmentation). (05 Mar 2000) |
| stab neutrophil | <pathology> Immature neutrophils released from the bone marrow reserve in response to acute demand. (18 Nov 1997) |
| neutrophil | <haematology> A granulocyte, a white blood cell. (18 Nov 1997) |
| neutrophil activating protein | <cytokine> A cytokine that activates neutrophils and attracts neutrophils and T-lymphocytes. It is released by several cell types including monocytes, macrophages, T-lymphocytes, fibroblasts, endothelial cells, and keratinocytes by an inflammatory stimulus. Il-8 is a member of the beta-thromboglobulin superfamily and structurally related to platelet factor 4. Acronym: IL-8 (12 Dec 1998) |
| neutrophil activation | The process in which the neutrophil is stimulated by diverse substances, resulting in degranulation and/or generation of reactive oxygen products, and culminating in the destruction of invading pathogens. The stimulatory substances, including opsonised particles, immune complexes, and chemotactic factors, bind to specific cell-surface receptors on the neutrophil. (12 Dec 1998) |
| neutrophil collagenase | <enzyme> Cleaves interstitial collagens in the triple helical domain; cleaves type I collagen more rapidly than type III; fibroblast collagenase cleaves at the same site as neutrophil colagenase Registry number: EC 3.4.24.34 Synonym: matrix metalloproteinase 8, mmp-8, mmp 8, fibroblast collagenase (26 Jun 1999) |
| neutrophil granule | A granule stainable with the neutral component of stains, e.g., the Romanovsky-type blood stains. (05 Mar 2000) |
| accelerator factor | <chemical> Heat- and storage-labile plasma glycoprotein which accelerates the conversion of prothrombin to thrombin in blood coagulation. Factor v accomplishes this by forming a complex with factor xa, phospholipid, and calcium (prothrombinase complex). Deficiency of factor v leads to owren's disease. Chemical name: Blood-coagulation factor V (12 Dec 1998) |
| acetate replacement factor | <biochemistry> 1,2 dithiolane 3 valeric acid. Regarded as a coenzyme in the oxoglutarate dehydrogenase complex of the citric acid cycle. Involved generally in oxidative decarboxylations of _ keto acids. A growth factor for some organisms. (18 Nov 1997) |
| adrenal weight factor | A postulated substance of adenohypophysial origin responsible for maintenance of the weight of the adrenal cortex. (05 Mar 2000) |
| adrenocorticotropic releasing factor | Hormone produced by hypothalamus that causes pituitary to secrete adrenocorticotropic hormone. (05 Mar 2000) |
| a-factor | <molecular biology> A protein which is found in the bacterial genus Streptomyces that helps start the production of streptomycin and the process of morphological differentiation. It is used in biotechnology to induce these functions in mutant strains of Streptomyces that cannot produce it themselves. (09 Feb 1998) |
| angiogenesis factor | Substance causing proliferation of new blood vessels. It is found in tissues with high metabolic requirements, such as the retina, and in certain cancers. The factor is also released by hypoxic macrophages at the edges or outer surfaces of wounds and initiates revascularization in wound healing. (12 Dec 1998) |
| animal protein factor | <biochemistry> Member of the water soluble B vitamin group, important in the proper function of the nervous system and important in proper carbohydrate, protein and fat metabolism. (27 Sep 1997) |