News tagged with immune cells

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

Withdrawal from the evolutionary race

In some HIV sufferers, the immune system does not fight off the immune deficiency virus. Instead, the body tolerates the pathogen. A research team headed by ETH Zurich has now determined how strongly patients ...

20 hours ago
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A novel therapy for sepsis?

A University of Tokyo research group has discovered that pentatraxin 3 (PTX3), a protein that helps the innate immune system target invaders such as bacteria and viruses, can reduce mortality of mice suffering ...

Sep 16, 2014
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The genetics of coping with HIV

We respond to infections in two fundamental ways. One, which has been the subject of intensive research over the years, is "resistance," where the body attacks the invading pathogen and reduces its numbers. Another, which ...

Sep 16, 2014
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Gut bacteria tire out T cells

Leaky intestines may cripple bacteria-fighting immune cells in patients with a rare hereditary disease, according to a study by researchers in Lausanne, Switzerland. The study, published in The Journal of Experimental Me ...

Sep 15, 2014
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Unusual immune cell needed to prevent oral thrush

An unusual kind of immune cell in the tongue appears to play a pivotal role in the prevention of thrush, according to the researchers at the University of Pittsburgh School of Medicine who discovered them. The findings, published ...

Sep 08, 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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