News tagged with white blood cells

Related topics: cells , immune system , immune cells , t cells , immune response

New study finds novel population of neutrophils

Case Western Reserve University researchers have discovered a novel population of neutrophils, which are the body's infection control workhorses. These cells have an enhanced microbial killing ability and are thereby better ...

Mar 24, 2014
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Drugs fail to reawaken dormant HIV infection

Scientists at Johns Hopkins report that compounds they hoped would "wake up" dormant reservoirs of HIV inside immune system T cells—a strategy designed to reverse latency and make the cells vulnerable to ...

Mar 23, 2014
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Rare form of leukemia found to originate in stem cells

(Medical Xpress)—An international team of researchers working out of the University of Toronto has found that one type of rare leukemia appears to get its start in stem cells. In their paper published in ...

Feb 13, 2014
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Researchers find source of new lineage of immune cells

The elusive progenitor cells that give rise to innate lymphoid cells—a recently discovered group of infection-fighting white blood cells—have been identified in fetal liver and adult bone marrow of mice, researchers from ...

Feb 12, 2014
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White blood cell

White blood cells (WBCs), or leukocytes (also spelled "leucocytes"), are cells of the immune system defending the body against both infectious disease and foreign materials. Five different and diverse types of leukocytes exist, but they are all produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell. Leukocytes are found throughout the body, including the blood and lymphatic system.

The number of leukocytes in the blood is often an indicator of disease. There are normally between 4×109 and 1.1×1010 white blood cells in a litre of blood, making up approximately 1% of blood in a healthy adult. An increase in the number of leukocytes over the upper limits is called leukocytosis, and in leukopenia, this number is much lower than the lower limit. The physical properties of leukocytes, such as volume, conductivity, and granularity, may change due to activation, the presence of immature cells, or the presence of malignant leukocytes in leukemia.

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