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Tag: "adult" at biology news

Using nanoparticles, in vivo gene therapy activates brain stem cells

...tists used gene-nanoparticle complexes to activate adult brain stem/progenitor cells in vivo, demonstrating...ough. "What we did here instead was to reactivate adult stem cells located on the floor of brain ventricles, germinal cells that normally produce progeny th...

Researchers grow stem cells from human skin

... the first studies to show the ability of a single adult stem cell to become multiple tissue types, is reported today in Stem Cells and Development. "These cells should provide a valuable resource for tissue repair and for organs as well," said Anthony Atala, M.D., director of the Wake Forest Institute fo...

One hit of crystal meth causes birth defects

...different toxic effects in the fetal brain than in adult mice, which surprised me," says Wells. "In adults, you can see actual structural degeneration of the brain." U of T doctoral candidates Winnie Jeng and Andrea Wong and undergraduate Ryan Ting-A-Kee were also involved in this study. The research was ...

Researchers discover mechanism for multiplying adult stem cells

...any scientists are also exploring the potential of adult stem cells for possible therapies. But this field raises other difficulties. Although adult stem cell research isn't fraught with the controversies that surround embryonic stem cells, adult st...

Scripps research scientists identify infertility molecule

...ignals for many different developmental events and adult physiology. Chun and his colleagues identified the first lysophospholipid receptor about ten years ago, when he was at the University of California, San Diego, and since then eight more of these receptors have been identified. The LPA receptors are ...

Scripps research scientists solve structure of a critical innate immune system protein

...ryonic development and for immune functions of the adult organism. In adult fruit flies, the protein is an essential receptor molecule that defends against fungal infections. ...

Scalpel-free surgery could reduce risk of HIV and hepatitis exposure for health care workers

...d Makary. The researchers studied 709 consecutive adult general surgery operations performed between July 2003 and June 2004 in the community surgical service at The Johns Hopkins Hospital including inpatient, emergency department and outpatient surgical procedures. Data were collected on HIV, hepatitis B...

Decisions, decisions: Male or female?

...entually become the sperm or eggs needed later for adult reproduction," said Mark Van Doren, assistant professor in the Department of Biology in the university's Krieger School of Arts and Sciences. "Now we know one way these other cells are talking to germ cells about sex." Van Doren was co-author of the...

Fluorescing lab worms signal longer life spans

...t the life span in an organism on the first day of adult life based on how it responds to stress," said CU-... that the predictions are made on the first day of adult life," Johnson said. Obtained from jellyfish and widely used in genetic experiments, the green fluo...

Novel plague virulence factor identified

...es only three days to develop from an embryo to an adult capable of reproducing. Also, scientists can easily manipulate specific genes in the worm, and in contrast to other animal models, large quantities of the worms can be grown quickly and can even be frozen and used later. "C elegans lives in the soil...

New Look at DNA Hints at Origin of UV Damage

...es only three days to develop from an embryo to an adult capable of reproducing. Also, scientists can easily manipulate specific genes in the worm, and in contrast to other animal models, large quantities of the worms can be grown quickly and can even be frozen and used later. "C elegans lives in the soil...

FSU scientist warns North Atlantic right whale facing extinction

... 25 years of study of the species -- including six adult females, three of which carried near-term fetuses. At least four of the whales were killed by human activities; ships hit three; and one whale was entangled in fishing gear. Only 17 percent of all mortality is detected, so reports of dead whales repr...

Scientists to mimic nature for newest cancer drugs

... 25 years of study of the species -- including six adult females, three of which carried near-term fetuses. At least four of the whales were killed by human activities; ships hit three; and one whale was entangled in fishing gear. Only 17 percent of all mortality is detected, so reports of dead whales repr...

Siberian tigers hang tough

...ers, researchers report that approximately 334-417 adult tigers remain in the region, along with 97-112 cub...winter survey, conducted in 1996, reported 330-371 adult tigers, with 85-105 cubs. "The difference in results between 1996 and this survey," said Dimitri Pik...

Scientists discover stem cell origin of neck and shoulders

...ag embryonic stem cells and then trace them to the adult animal. They discovered that instead of homogeneous groups of stem cells making up the bones of the shoulder and neck and another making the muscles, a newly-discovered group of stem cells called mesenchymal stem cells make both the muscles and the p...

Doctors should stop prescribing antibiotics for the common cold, review advises

...instance as they will not improve the symptoms and adult patients will get adverse effects." In addition to the side effects, mainly diarrhea, "overuse can increase levels of antibiotic resistance in the community," the review advises. Colds are caused by viruses and not bacteria, upon which antibiotics ...

Researchers track down cause of a disfiguring bone disorder

... dramatically "down-regulated," or less active, in adult mice carrying the deleted region than in the norma...hat help direct the expression of the SOST gene in adult humans. In an effort to locate the specific enhancer sequence responsible for SOST regulation, the ...

Most common lung cancers may begin in newly discovered cells

...test criteria that scientists look for in defining adult stem cells. The study is published in the June 17...sion more medical possibilities, such as using the adult stem cells to restore defective tissue in incurable fatal chronic lung diseases, such as alveolar ce...

'Jumping genes' contribute to the uniqueness of individual brains

...es, jumping L1 elements are not only unique to the adult brain but appear to happen also during early stages of the development of nerve cells. The Salk team found insertions only in neuronal precursor cells that had already made their initial commitment to becoming a neuron. Other cell types found in the ...

Researchers devise new technique for creating human stem cells

... for creating human embryonic stem cells by fusing adult somatic cells with embryonic stem cells. The fusion causes the adult cells to undergo genetic reprogramming, which results in cells that have the developmental character...

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