News tagged with immune cells

Related topics: immune system · cells · immune response · t cells · autoimmune diseases

How ancestry shapes our immune cells

Virtually the entire population of sub-Saharan Africa, and some 70% of African Americans, carry a gene variant (allele) which results in a trait referred to as Duffy-negative. It has long been known that carriers of this ...

Jun 01, 2017
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Unmasking rogue cells in the immune system

The immune system is a formidable defense against microbial intruders, identifying and eliminating threats through an extremely intricate and adaptable network of specialized cells. However, a system of such deep complexity ...

May 30, 2017
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New hair growth mechanism discovered

In experiments in mice, UC San Francisco researchers have discovered that regulatory T cells (Tregs; pronounced "tee-regs"), a type of immune cell generally associated with controlling inflammation, directly trigger stem ...

May 25, 2017
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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.

This text uses material from Wikipedia, licensed under CC BY-SA

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