News tagged with white blood cells
Researchers identify mechanism that maintains stem cells readiness
An immune-system receptor plays an unexpected but crucially important role in keeping stem cells from differentiating and in helping blood cancer cells grow, researchers at UT Southwestern Medical Center report today in the ...
May 31, 2012 |
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New microscope uses rainbow of light to image the flow of individual blood cells
Blood tests convey vital medical information, but the sight of a needle often causes anxiety and results take time. A new device developed by a team of researchers in Israel, however, can reveal much the same ...
May 21, 2012 |
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Researchers have a natural sidekick that may resolve the antibiotic-resistant bacteria dilemma
Antibiotic-resistant bacteria continue to be a global concern with devastating repercussions, such as increased healthcare costs, potential spread of infections across continents, and prolonged illness.
Apr 25, 2012 |
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Salmonella infection, but not as we know it
Researchers at Cambridge University have shed new light on a common food poisoning bug. Using real-time video microscopy, coupled with mathematical modelling, they have changed our assumptions about Salmonella and how it ...
Apr 25, 2012 |
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Pigeons' navigation skill not down to iron-rich beak cells: study
The theory that pigeons' famous skill at navigation is down to iron-rich nerve cells in their beaks has been disproved by a new study published in Nature.
Apr 11, 2012 |
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In a new microchip, cells separate by rolling away
Cell rolling is a common mechanism cells use to navigate through the body. During inflammation, for example, the endothelial cells that line blood vessels present certain molecules that attract white blood ...
Chemistry / Analytical Chemistry
Feb 24, 2012 |
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Handheld device for doing blood tests moves closer to medical use
Scientists are reporting a key advance in efforts to develop a handheld device that could revolutionize the complete blood cell count (CBC), one of the most frequently performed blood tests used to diagnose ...
Chemistry / Analytical Chemistry
Feb 01, 2012 |
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Could Alzheimer's disease be diagnosed with a simple blood test?
Spanish researchers, led by Pedro Carmona from the Instituto de Estructura de la Materia in Madrid, have uncovered a new promising way to diagnose Alzheimer's disease more accurately. Their technique, which is non-invasive, ...
Jan 25, 2012 |
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Polymer science team designs new nanotech technique for lower-cost materials repair
(PhysOrg.com) -- In the super-small world of nanostructures, a team of polymer scientists and engineers at the University of Massachusetts Amherst have discovered how to make nano-scale repairs to a damaged ...
Nanotechnology / Nanomaterials
Jan 12, 2012 |
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Going to the dogs: University's newest patent for improving canine health
Make no bones about it, a discovery by a Kansas State University research team could mean a longer and healthier life for man's best friend.
Nov 29, 2011 |
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Molecules on branched-polymer surfaces can capture rare tumor cells in blood
The removal of rare tumor cells circulating in the blood might be possible with the use of biomolecules bound to dendrimers, highly branched synthetic polymers, which could efficiently sift and capture the diseased cells, ...
Nov 17, 2011 |
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Cancer-killing cells are caught on film in more 3D detail than ever before
Scientists reveal in more detail than ever before how white blood cells kill diseased tissue using deadly granules, in research published today in PLoS Biology.
Sep 14, 2011 |
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Single-molecule imaging reveals how cells prepare to interact with the world
Researchers at Harvard Medical School have discovered that structural elements in the cell play a crucial role in organizing the motion of cell-surface receptors, proteins that enable cells to receive signals from other parts ...
Aug 18, 2011 |
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Quick test diagnoses bacterial or viral infection
Researchers at Ben-Gurion University of the Negev (BGU) have developed a new test that quickly and accurately distinguishes between bacterial and viral infections in as little as five hours.
Chemistry / Analytical Chemistry
Jul 20, 2011 |
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Cancer-stricken British girl's 'Bucket List' is Internet hit
A cancer-stricken British teenage girl said Thursday she had been overwhelmed by messages of support from around the world after writing an online "Bucket List" of things she wanted to do before dying.
Jun 09, 2011 |
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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.
For more information about White blood cell, read the full article at
Wikipedia.
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