News tagged with immune cells

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

FDA approves 'game changing' drug for melanoma

The U.S. Food and Drug Administration today approved a new immunotherapy drug to treat advanced melanoma, signaling a paradigm shift in the way the deadly skin cancer is treated.

Sep 04, 2014
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A new pathway discovered regulating autoimmune diseases

The main function of the immune system is to protect against diseases and infections. For unknown reasons our immune system attacks healthy cells, tissues and organs in a process called autoimmunity, which can result in diseases ...

Oct 07, 2014
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New therapy wipes out cervical cancer in two women

Aricca Wallace knew she was nearly out of time. For more than three years, she had suffered cramping and irregular bleeding, which her doctor thought was a side effect of her birth control implant, known ...

Jun 02, 2014
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Key to aging immune system is discovered

There's a good reason people over 60 are not donor candidates for bone marrow transplantation. The immune system ages and weakens with time, making the elderly prone to life-threatening infection and other ...

Jul 31, 2014
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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 ...

Sep 18, 2014
popularity 3.2 / 5 (17) | comments 0

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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