News tagged with white blood cells

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

Natural (born) killer cells battle pediatric leukemia

Researchers at Children's Hospital Los Angeles have shown that a select team of immune-system cells from patients with leukemia can be multiplied in the lab, creating an army of natural killer cells that ...

Aug 19, 2014
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Scientists use stem cells to create HIV resistance

(Medical Xpress)—Yuet Wai Kan of the University of California, San Francisco and colleagues have created HIV-resistant white blood cells by editing the genomes of induced pluripotent stem cells. The researchers ...

Jun 10, 2014
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Blood stem cell longevity explained

(Medical Xpress)—The blood stem cells that live in bone marrow are at the top of a complex family tree. Such stem cells split and divide down various pathways that ultimately produce red cells, white cells ...

Nov 26, 2013
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Scientists explain stress-heart attack link

Scientists said Sunday they may have unravelled how chronic stress leads to heart attack and stroke: triggering overproduction of disease-fighting white blood cells which can be harmful in excess.

Jun 22, 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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