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Tag: "rejected" at biology news

Selectivity is ultimate aphrodisiac

...ally desired most of their potential partners were rejected quickly and overwhelmingly, according to a new Northwestern University study. Conventional wisdom has long taught that one of the best ways to get someone to like you is to make it clear that you like them. Now researchers have discovered that this...

Stem cells act through multiple mechanisms to benefit mice with neurodegenerative disease

...o inappropriate cells types. Neither cell type was rejected by the immune system. In fact, no immunosuppression was needed at all. Finally, the human embryonic stem cells were grown without mouse feeder layers and in a "defined" culture medium that is compatible with clinical use and demonstrating for the fir...

Scientists clone mice from adult skin stem cells

...onic stem cells would be recognized as foreign and rejected by the patient," says senior co-author Elaine Fuchs, the Rebecca Lancefield Professor at Rockefeller and a Howard Hughes Medical Institute investigator. "This is one of the reasons why scientists have focused so much attention toward using nuclear tr...

The connector rotation hypothesis? Phage do not pack their DNA by rotation

...el to the degree of certainty with which this team rejected the rotator hypothesis. ...

Low levels of neurotransmitter serotonin may perpetuate child abuse across generations

...ained constant into adulthood. Monkeys who were rejected more by their mothers early in life had lower serotonin in their brains than monkeys reared by less rejecting mothers. The effects of maternal behavior on brain serotonin in the offspring were observed in both infants that were reared by their geneti...

Bone marrow may restore cells lost in vision diseases

...use it's a ready source and the cells would not be rejected by the patient. Further, if bone-marrow progenitors circulating in the blood could be attracted to sites of disease, surgery could be avoided." ...

Federal testing for mad cow disease a failure, law review editor says

...nsed only for "surveillance" of animal health, and rejected Creekstone's request because it implied "a consumer safety aspect" that was "not scientifically warranted." The agency invoked the 1913 Virus-Serum-Toxin Act, intended to assure the safe supply of animal vaccines, as its authority for barring privat...

Successful transplantation from pig embryos to mice

...ells are similar to those of humans), might not be rejected as strongly. New research by Prof. Yair Reisner of the Weizmann Institute's Immunology Department has brought the possibility of transplants from pig embryos one step closer. The results of the study appeared in the June issue of PLoS Medicine. In ...

Honey helps problem wounds

...ested. The success is astonishing: 'Dead tissue is rejected faster, and the wounds heals more rapidly,' Kai Sofka, wound specialist at the University Children's Clinic, emphasises. 'What is more, changing dressings is less painful, since the poultices are easier to remove without damaging the newly formed lay...

New device could cut chemotherapy deaths

...le with body tissue, which means they would not be rejected by the patient's body. They gradually turn from solid to liquid, releasing a regular flow of the chemotherapy chemical into the cancer site, and a much lower dose to the rest of the body. This is a more localised way of killing cancer cells than the...

New analysis shows three human migrations out of Africa

...said. "I set up a null hypothesis and the program rejected that hypothesis using the new data with a probability level of 10 to the minus 17th. In science, you don't get any more conclusive than that. It says that the hypothesis of no interbreeding is so grossly incompatible with the data, that you can re...

Carnegie Mellon develops non-invasive technique to detect transplant rejection at cellular level

...nted heart tissue that indicate the graft is being rejected by the body's immune system. These procedures are costly, uncomfortable and must be repeated annually for a few years to monitor and treat any rejection. Biopsies also are problematic, according to Ho, because they do not look at the whole organ. By...

UK sperm donor crisis

...defaulted along the way and almost two-thirds were rejected (85% of those because of sub-optimal semen quality). At the end of the recruitment and testing process fewer than four in a hundred (3.63%) were accepted as suitable donors. Overall, there was a downward trend in the annual number of applicants fro...

DNA size a crucial factor in genetic mutations, study finds

..., the smallest and largest analogs in the set were rejected by the enzyme and the bacteria. According to Kool, these results indicate that size is a strong factor determining enzyme efficiency-and a mechanism for allowing mutations into the DNA molecule. ''It's a way the organism can evolve,'' Kool says. ''...

Researchers propose measures to curb lion attacks in Tanzania

...re is also far less likelihood of such cells being rejected when they are transplanted into people with liver disease, for example." The team has taken its first steps towards proving its claims by growing defined liver tissue using the new cell type. By making use of special NASA-derived technology, the tea...

Insight into the processes of 'positive' and 'negative' learners

...re is also far less likelihood of such cells being rejected when they are transplanted into people with liver disease, for example." The team has taken its first steps towards proving its claims by growing defined liver tissue using the new cell type. By making use of special NASA-derived technology, the tea...

Researchers make 'embryonic-like' stem cells from umbilical cord blood

...re is also far less likelihood of such cells being rejected when they are transplanted into people with liver disease, for example." The team has taken its first steps towards proving its claims by growing defined liver tissue using the new cell type. By making use of special NASA-derived technology, the tea...

Hopkins AIDS experts issue warning about global efforts to provide drug therapies

...azine to feature on its cover a picture of a child rejected for treatment, prompting the committee to attempt to change its criteria toward a psychological assessment. With liver transplants, patient selection was plagued by different interpretations of who medically benefited most from a transplant and by a...

Precise Timing Enabled Pig-to-rat Transplants To Cure Diabetes

...ting back to 35 days after fertilization, the rats rejected the pig tissues and continued to be diabetic," say...rgan. However, this didn't happen in the rats that rejected secondary kidney transplants. To Hammerman, this suggests that the pancreatic primordia may be effe...

Double triumph in stem cell quest

...abetes and Parkinson's, non-matching ESCs would be rejected by patients' immune systems unless they take immunosuppressant drugs. This is why many stem cell researchers are trying to create ESCs that are identical to people's own cells. Last year Woo Suk Hwang of Seoul National University claimed to have cre...

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