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Tag: "layer" at biology news

University of Manchester makes made-to-measure skin and bones a reality using inkjet printers

...op of each other untilthe structure is built. Each layer is just 10 microns thick (1,000layers equals 1cm in thickness).This method allows larger tissues to be grown than previously possible.The reason for this is the way in which the cells are inserted into thestructures.Before being fed into the printer,...

Current human embryonic stem cell lines contaminated UCSD/Salk team finds

...mbryo-derivedconnective tissue cells as the feeder layer in the culture.A further solution might be a short-term culture in heat-inactivatedserum from the actual patient who is going to receive the therapy, thescientists said. However, it may still prove difficult to completelyeliminate the Neu5Gc, because...

Emory Eye Center Implants Its First Retinal Chips In Patients With Retinitis Pigmentosa

...seases that predominantly affect the photoreceptor layer or "light sensing" cells of the retina. Night blindness develops, usually in childhood, followed by loss of peripheral visual field, progressing over many years to tunnel vision and finally blindness. At Emory Eye Center retina specialists Thomas M....

New Clues Add 40,000 Years to Age of Human Species

.... In addition, the sediments show that each major layer deposited very rapidly, perhaps within a few thousand years or less. In the case of the Omo hominids, the researchers linked the isotopic ages to a brief period during which sediments entombed both sets of bones. Together, the various lines of evid...

Needling Chromosomes Reveals Cell Division Secret

...the cell, andthe needles are coming down through a layer of oil covering the cell topreserve it."So, you also have to constantly adjust the focus to determine wherethe needle is coming down into the cell. This is difficult with oneneedle, but with two it's a terrific challenge; and you really need analmost...

Ice core 'dipstick' indicates West Antarctic ice has thinned less than believed

...ice shelf's grounding line. Studying the ice core layer by layer, each representing one year's worth of snowfall compacted into a very thin band, researchers were able to extract an isotope record that provided a picture of temperature and snowfall patterns near Siple Dome. The layers get thinner and thin...

Research Using Mouse Models Reveals A Novel Key Player In The Initiation Of Colon Cancer

... profound effect on the cells lining the innermost layer of the colon (called the epithelium) and causes th...is also expressed in the colon, but in a different layer of cells, adjacent to the epithelium, called the mesenchyme. They had seen that mice that are defici...

UCSD team discovers specialized, rare heart stem cells in newborns

... millions of progenitor cells by growing them on a layer of neighboring heart cells called fibroblasts. Published in the February 10, 2005 issue of the journal Nature, the research identified the isl1+ progenitor cells in the tissue of newborn rats and mice, and then in heart tissue taken from five newbor...

Rush Physicians Using Gene Therapy For Heart Patients With Moderate To Severe Chest Pains Who Do Not Benefit From Other Treatments

...NA plasmid is then taken up by the middle muscular layer of the heart wall near the injection site. Inside the cell, the DNA encoded VEGF-2 expresses itself which in turn stimulates the growth of new blood vessels by promoting the proliferation of endothelial cells in the heart. New blood vessels are requ...

Self-assembled nano-sized probes allow Penn researchers to see tumors through flesh and skin

.... Whereas cell membranes are created from a double layer of fatty phospholipid chains, a polymersome is comprised of two layers of synthetic co-polymers. Like a living cell, the polymersome membrane has a hydrophobic core. The study shows that the fluorophores evenly disperse within this core, giving rise ...

Polymers with copper show promise for implanted sensors

...te nitric oxide. The nitric oxide produced in this layer of cells diffuses back into the blood vessel walls, where it relaxes surrounding muscle cells and increases blood flow. It also diffuses into the lumen of the blood vessel, where it plays another important role: it inhibits platelet function and prev...

Nano-bumps could help repair clogged blood vessels

... attach to stents and form a coating only one cell layer thick, which we call a monolayer," Webster said. "Otherwise, if the metal is not entirely coated, blood cells passing through the repaired artery come into contact with the metal and recognize it as foreign." Findings will be presented on April 28 d...

Master gene controls healing of skin in fruit flies and mammals

...evelopment and repair of insect cuticle--the outer layer of the body surface in insects--also controls thes...report that, although insect cuticle and the outer layer of mammal skin are very different chemically, the grainyhead gene is also essential for normal skin ...

Stem cell research - new cell lines

...nsulin-producing cells, which are derived from the layer which also forms the gut and liver are the holy grail for diabetes researchers," said Dr Sidhu. "That's because they are destroyed in type-1 diabetes, which affects at least 100,000 people in Australia. So far there is no cure for it. "Human embryon...

Human Eggs Can Develop From Ovarian Surface Cells In Vitro

...es has shown that oocytes and granulosa cells (the layer of small cells that form the wall of the ovarian follicle) may originate from OSE cells and assemble together to form new primary follicles -- the structures that grow and rupture during ovulation to release mature eggs. However, definitive proof tha...

Embryonic Stem Cells Treated With Growth Factor Reverse Hemophilia In Mice: UNC Researchers

...precursors," or PEPs. Endoderm refers to the inner layer of early embryonic cells that develops into the digestive and respiratory systems. "Not only do ES cells differentiate into PEPs, they also engraft, persist, differentiate further and then function following injection, resulting in the persistent pr...

Engineers improve plastic's potential for use in implants by linking it to biological material

...peaks and valleys. In this case, the surface was a layer of polypyrrole, and the resistance of the peptide-coated tip to being passed across the surface revealed how well T59 clung to the plastic. "They had a moderately strong interaction, which is useful to know," Schmidt said, referring to the need for ...

Scientists use manufacturing methods to reconstruct mastodon

...three-dimensional, physical object, building it up layer by layer, with each layer only 0.1 millimeter (0.004 inch) thick. Crews of UROP students and community volunteers also made m...

New method shows it is possible to grow bone for grafts within a patient's body

...Long bones in the body are covered by a thin outer layer called the periosteum. The layer is a little like scotch tape: the outside is tough and fibrous but the inside is covered with a laye...

New tool reveals secrets of migrating cells

...in test tubes, or watch their behavior in a single layer of cells. It's an imaging revolution to be able to go into the native environment while keeping the intact organ alive and make movies of migrating cells." With two-photon imaging, Witt and Robey identified thymus cells they dubbed beeliners moving ...

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