leucocyte

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leu·ko·cyte

(lū'kō-sīt)
A type of cell formed in the myelopoietic, lymphoid, and reticular portions of the reticuloendothelial system in various parts of the body, and normally present in those sites and in the circulating blood. Under various abnormal conditions, the total number of leukocytes may be increased or decreased or their relative proportions altered, and they may appear in other tissues and organs. Leukocytes represent three lines of development from primitive elements: myeloid, lymphoid, and monocytic series. On the basis of features observed with various methods of staining with polychromatic dyes, cells of the myeloid series are frequently termed granular leukocytes, or granulocytes; because the cytoplasmic granules of lymphocytes and monocytes are smaller and frequently not clearly visualized with routine methods, these cells are sometimes termed nongranular or agranular leukocytes. Granulocytes are commonly known as polymorphonuclear leukocytes (also polynuclear or multinuclear leukocytes), because in a mature cell the nucleus is divided into two to five rounded or ovoid lobes that are connected with thin strands or small bands of chromatin; they consist of three distinct types: neutrophils, eosinophils, and basophils, named on the basis of the staining reactions of the cytoplasmic granules. Cells of the lymphocytic series are smaller than other leukocytes and have relatively large, darkly staining, eccentrically placed nuclei. Cells of the monocytic series are usually larger than the other leukocytes and are characterized by a relatively abundant, slightly opaque, pale blue or blue-gray cytoplasm that contains many fine reddish-blue granules. Monocytes are usually indented, reniform, or shaped similarly to a horseshoe, but are sometimes rounded or ovoid; their nuclei are usually large and centrally placed and, even when eccentrically located, are completely surrounded by at least a small band of cytoplasm.
Synonym(s): white blood cell, leucocyte.
[leuko- + G. kytos, cell]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

leucocyte

Any kind of white blood cell. The leukocytes include the neutrophil POLYMORPHONUCLEAR LEUKOCYTES (‘Polymorphs’), EOSINOPHILS, BASOPHILS, LYMPHOCYTES and MACROPHAGES.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

leu·ko·cyte

(lū'kō-sīt)
Cell formed in myelopoietic, lymphoid, and reticular portions of the reticuloendothelial system in various parts of the body, and normally present in those sites and in the circulating blood.
Synonym(s): white blood cell, leucocyte.
[leuko- + G. kytos, cell]
Medical Dictionary for the Dental Professions © Farlex 2012

Patient discussion about leucocyte

Q. can i get a short explanation about white blood cells and their job? what does it mean if i have a insafition

A. White blood cells (WBC's) are the ones responsible for the immune system in the body. The white blood cell count rises in cases of infection, steroid use and other conditions. A low white blood cell count can have many causes, which need to be further evaluated by a doctor.

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References in periodicals archive ?
(EA Pharma) have revealed a mechanism in which an analogue (ER-464195-01) of Eisai's in-house discovered E6007 inhibits integrin activation by dissociating interaction between calreticulin (CRT) and integrin alpha 4 (ITGA4), suppressing adhesion and infiltration of leukocytes overall.
It should also be kept in mind that the lack of standard PRP preparation technique and the absence of platelet and leukocyte concentration may still affect the results.
LAD is a rare immune deficiency disorder and should be suspected in an infant with typical presentation and confirmed by flow cytometric analysis for the expression of deficient integrin molecules on leukocytes.
Altered results in leukocyte differential counts and microscopic morphology due to testing delay are not only erroneous, but may cause misinterpretation with potentially harmful consequences.
X4P-001-LD is designed to normalize the signaling for the mutant CXCR4 receptor to promote the release of neutrophils and leukocytes, thereby restoring immune surveillance.
[sup.111]In-Labeled Autologous Leukocytes. After the CT-scan, [sup.111]In oxine labelled leukocytes were prepared according to the instructions given by the manufacturer, Mallinckrodt, Pharmaceutical, Copenhagen, Denmark.
The mean of the average values of leukocyte adhesion determined in each mouse was then used to generate a group mean.
These results may be considered an impaired immune and/or stress response of leukocytes in obesity against high intensity exercise challenge.
The leukocyte count for the control group was found to be 88.00 [+ or -] 1.325 x [10.sup.6] cells/cavity.
In addition to the microfluidic "capture chamber," the new chip incorporates separate ports for lysing reagents and quenching buffers that preserve the leukocytes for counting by the microfabricated electrodes.
1, the isolation method using CD66b positive selection effectively purified granulocytes from other leukocytes. Fixed slides of post-preparative cell resuspensions (Fig.

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