Genetic mutations that drive the development of a common type of childhood leukaemia can be traced back to errors by the immune system during the production of antibodies.
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A healthy adult makes about 2 million blood cells every second, and 99 percent of them are oxygen-carrying red blood cells. The other one percent are platelets and the various white blood cells of the immune system. How all ...
Mar 21, 2019
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A research team led by the Yale School of Public Health has found that for people living with HIV/AIDS, both recent immunosuppression (a low recent CD4 T-cell count [white blood cells that fight infection]) and prolonged ...
Mar 21, 2019
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Researchers have known for some time that poor sleep raises heart disease risk. Now, they've found a chemical chain reaction that helps explain that risk, leading from poor sleep to a white blood cell surge that promotes ...
Mar 20, 2019
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Researchers at the Stanford University School of Medicine have demonstrated a method of forecasting which breast cancer patients will suffer heart problems from a commonly used chemotherapy drug.
Mar 14, 2019
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When studying Crohn's disease, an inflammatory disorder of the gastrointestinal tract, a challenge is separating out potential causes from the flood of systemic inflammation inherent in the condition. Researchers led by Subra ...
Mar 08, 2019
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Seemingly overnight, healthy children develop mysterious, potentially disabling symptoms. When children finally receive a diagnosis, often after weeks of tests and office and hospital visits, the parents may be shocked to ...
Mar 07, 2019
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A research team led by Prof. Dr. Winfried Römer and Dr. Elias Hobeika from the University of Freiburg and the University Medical Center in Ulm has discovered a mechanism by which bacteria activate white blood cells and attack ...
Mar 06, 2019
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The human body has a large surface area that is in contact with the outside world, much of this comes from the body's largest organ – our skin – which protects us from a variety of potential threats. The other major sites ...
Feb 28, 2019
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New research by the University of Liverpool and Liverpool School of Tropical Medicine shows that vaccination with weakened strains of Salmonella may also protect against other infections.
Feb 27, 2019
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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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