Related topics: immune system , stem cells , cells , cancer , proceedings of the national academy of sciences
White blood cell
hideWhite 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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News tagged with white blood cells
Common allergy drug reduces obesity and diabetes in mice
Jul 26, 2009 |
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Crack open the latest medical textbook to the chapter on type 2, or adult-onset, diabetes, and you'll be hard pressed to find the term "immunology" anywhere. This is because metabolic conditions and immunologic conditions ...
Immune cells from patients with rheumatoid arthritis have prematurely aged chromosomes
Mar 04, 2009 |
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Telomeres, structures that cap the ends of cells' chromosomes, grow shorter with each round of cell division unless a specialized enzyme replenishes them. Maintaining telomeres is thought to be important for healthy aging ...
'Mini' transplant may reverse severe sickle cell disease
Dec 09, 2009 |
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Results of a preliminary study by scientists at the National Institutes of Health and Johns Hopkins show that "mini" stem cell transplantation may safely reverse severe sickle cell disease in adults.
Gene Testing In the Doctors Office
Nanotechnology / Bio & Medicine
Dec 02, 2009 |
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(PhysOrg.com) -- A portable instrument manufactured by Nanosphere Inc. and recently approved by the FDA, can detect genetic variations in blood that alter the effectiveness of some drugs.
New cancer target for non-Hodgkin's lymphoma
Nov 22, 2009 |
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Physician-scientists from Weill Cornell Medical College have discovered a molecular mechanism that may prove to be a powerful target for the treatment of non-Hodgkin's lymphoma, a type of cancer that affects lymphocytes, ...
Vaccine against chlamydia not far away
Nov 16, 2009 |
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When a woman becomes infected with Chlamydia, the first white blood cells that arrive at the scene to fight the infection are not the most effective. This is shown by a thesis from the Sahlgrenska Academy. This discovery ...
Magnetic nanoparticles to simultaneously diagnose, monitor and treat
Nanotechnology / Bio & Medicine
Nov 06, 2009 |
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(PhysOrg.com) -- Whether it's magnetic nanoparticles (mNPs) giving an army of 'therapeutically armed' white blood cells direction to invade a deadly tumour's territory, or the use of mNPs to target specific nerve channels ...
Researchers have immune cells running in circles
Nov 02, 2009 |
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(PhysOrg.com) -- University of Illinois at Chicago College of Medicine researchers have identified the important role a protein plays in the body's first line of defense in directing immune cells called neutrophils toward ...
New study identifies cellular mechanism that causes lupuslike symptoms in mice
Oct 18, 2009 |
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Macrophages, the scavenger cells of the body's immune system, are responsible for disposing of dying cells. Stanford University School of Medicine researchers have identified one pathway in this important process in mice ...
New chromosomal abnormality identified in leukemia associated with Down syndrome
Oct 18, 2009 |
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Researchers identified a new chromosomal abnormality in acute lymphoblastic leukemia (ALL) that appears to work in concert with another mutation to give rise to cancer. This latest anomaly is particularly common in children ...
To regenerate muscle, cellular garbage men must become builders
Sep 22, 2009 |
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For scientists at the European Molecular Biology Laboratory in Monterotondo, Italy, what seemed like a disappointing result turned out to be an important discovery. Their findings, published online this week ...
Experimental drug lets B cells live and lymphoma cells die
Sep 21, 2009 |
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(PhysOrg.com) -- An investigative drug deprived non-Hodgkin lymphoma cells of their ability to survive too long and multiply too fast, according to an early study published recently in the journal Experimental He ...
New research strategy for understanding drug resistance in leukemia
Sep 04, 2009 |
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UCSF researchers have developed a new approach to identify specific genes that influence how cancer cells respond to drugs and how they become resistant. This strategy, which involves producing diverse genetic mutations that ...
Study finds promise in combined transplant/vaccine therapy for high-risk leukemia
Aug 24, 2009 |
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(PhysOrg.com) -- Two of the most powerful approaches to cancer treatment -- a stem cell transplant and an immune system-stimulating vaccine -- appear to reinforce each other in patients with an aggressive, ...
Israeli scientists find way to combat forged DNA
Aug 20, 2009 |
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Israeli scientists have developed new technology to fight biological identity theft after realising that DNA evidence found at crime scenes can be easily falsified.
