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Tag: "skin" at biology news

Cuttlefish masters of disguise despite colorblindness

...arances. Their sophisticated neural control of the skin make cuttlefish an excellent model for studying camouflage. ...

Thin tough skin, slow-growing gills protect larval Antarctic fish

Very thin but hardy, unblemished skin and slow developing gills appear to be keys to sur...g through them to get inside. The delicately thin skin of the larval fish may offer additional protection, because their skin hasn't yet been exposed to en...

Patients now surviving once-fatal immune disease

...ting among this group were arthritis, diarrhea and skin infections. Several factors may have contributed to the increased survival of this group of patients. When compared to all patients with XLA, a high percentage of the patients included in this study had mild mutations in Btk. In addition, most had...

Cloned stem cells prove identical to fertilized stem cells

...riginal donated nucleus may have come from, say, a skin cell. For a viable fetus to develop, the egg needs to reprogram the genome of the skin cell, shutting off genes specific for skin tissue and turning on genes needed for embryonic developm...

Wisconsin scientists find a way to make human collagen in the lab

.... Collagen forms sheets of tissue that support the skin and every internal organ. There is nothing in the body, in fact, that does not depend in some way on collagen. In medicine, collagen from animals, principally cows, is used to rebuild tissue destroyed by burns and wounds. Commonly, it is employed in...

Researchers develop portable 'vein finder' for faster, more accurate injections

...oustical waves are transmitted. Compared to static skin and tissue, blood is a moving substance, so ultras...or directs the ultrasonic waves into the patient's skin at a slight angle. The device can determine the direction of blood flow to distinguish arteries (whi...

New University of Toronto research a 'pore' excuse for engineering

...lead to new methods for delivering medications via skin patches. The material, known as periodic mesoporous organosilica (PMO), is a thin film interspersed with pores just two-billionths of a metre across. The team created it by mixing an organosilica precursor (silica glass, containing organic groups) w...

Defective immune system response to smallpox vaccine detailed in new study

...a defect in the immune response of people with the skin condition atopic dermatitis that puts them at risk...enver, the researchers used laboratory-grown human skin cells to show that an immune system protein called LL-37 is critical in controlling replication of v...

Malaria parasites develop in lymph nodes

... Ménard found that the parasites moved through the skin in a random, circuitous path at a speed that is am... likely that at least some parasites remain in the skin of any mammal bitten by a malarial mosquito until immune cells come along to sweep them out, Ménard ...

A surprising pair of proteins help make healthy eggs

...tumors of certain cancers, including cancer of the skin and liver and in Hodgkin's lymphoma. The new research is the first to connect c-Jun to this network of ovarian genes. Freiman said the discovery reveals a potential connection between TAF4b and c-Jun and the formation of a rare kind of ovarian cancer...

Chemotherapy gel may fight breast cancer and reduce breast deformity

...tumors were treated by inserting the gel under the skin next to the mammary gland. The researchers found that they could successfully control the delivery of chemotherapy over a period of 30 days and that the tumors were completely eradicated compared to a control group of mice that were implanted with th...

Mice studies illustrate potential of chimp/human antibodies to protect against smallpox

...ons in individuals with weakened immune systems or skin conditions such as eczema, in infants younger than 12 months and in pregnant women. Health care providers currently treat smallpox vaccine complications with anti-vaccinia immune globulin (VIG)--pooled antibodies taken from the blood of individuals i...

Antioxidant selenium offers no heart-disease protection

...ation could prevent the recurrence of non-melanoma skin cancer. Results of the trial, the only large randomized clinical trial to date to examine selenium supplementation alone in the prevention of CVD, appear in the April 15 issue of the American Journal of Epidemiology. Saverio Stranges, M.D., Ph.D.,...

Flesh-eating bacteria escape body's safety net

...r a wide range of diseases ?from simple throat and skin infections to life-threatening conditions such as ...duced a spreading infection when injected into the skin of experimental mice." The critical role of the DNA-degrading Strep enzyme was confirmed by cloning...

Skin disease common among Hispanic farmworkers in North Carolina, research shows

...found that more than three out of four workers had skin disease and that workers need more information about how to prevent common skin conditions, as well as potentially deadly diseases such as skin cancer. Few studies have evaluated ...

Canine cancer vaccine program shows early promise

... cancer. Melanoma, the equivalent of one form of skin cancer in humans, is very aggressive in dogs. It usually manifests itself in or around the mouth or toes. Despite conventional treatment, 75 percent of dogs with oral melanoma will die within one year. But about 40 percent of dogs with a melanoma ...

Newly identified mechanism helps explain why people of African descent are more vulnerable to TB

...s of melanin -- the pigment that provides color to skin absorbs UV light and reduces African Americans' ability to produce vitamin D. When the macrophages were stimulated by molecules of the tubercle bacillus that trigger Toll-like receptors, the research team found that cells cultured in serum provided b...

Liver cancer linked to cellular repair pathway

... Hedgehog pathway is also linked to certain brain, skin and muscle cancers and has recently been implicated in cancers of the pancreas, esophagus, lungs and prostate. The work by the Duke and Johns Hopkins team now adds liver cancer to the growing body of evidence suggesting these cancerous tumors are gen...

DNA gene vaccine protects against harmful protein of Alzheimer's disease

...ticles were then injected with a gene gun into the skin cells of the mice's ears using a blast of helium. After receiving 11 injections over several months, the mice showed a high level of antibodies to amyloid-beta 42, and a 60 percent to 77.5 percent reduction of plaques in their brains. As controls...

Source of crucial immune cell in the skin discovered

...ers have identified the precursors of cells in the skin that are part of the first line of defense against...of cells covering the entire body is formed in the skin by a group of cells known as Langerhans cells. These cells ingest antigens present in the skin and t...

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