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Tag: "regeneration" at biology news

Gene therapy delivery of nerve growth factors reverses erectile dysfunction in animal model

...own in other studies to contribute to survival and regeneration of penile nerves. Neurturin also is a nerve growth factor closely related to GDNF. Control mice received only the virus without the GDNF or neurterin genes inserted. Four weeks after the treatment, rats administered HSV-GDNF exhibited significant...

A new plant-bacterial symbiotic mechanism promising for crop applications

...ciation with bacteria can contribute to vegetation regeneration schemes on soils depleted in nitrogen owing to overexploitation, erosion or desertification. The plant cover thus formed can help achieve ecological restoration, by enriching the soils in nitrogen. However, the symbiotic processes studied predominant...

Madagascan tropical forests return thanks to better management and well-defined ownership

...possible. However, scientists know even less about regeneration of tropical forests. "We now know a fair amount...out the role of social institutions in influencing regeneration of tropical forests," says Maria Tengö from Stockholm university and one of the authors behind the n...

Master regulatory gene of epithelial stem cells identified

..., however, identifies a "master regulator" of this regeneration process not only for skin, but for many epithelial tissues including breast, prostate, and urogenital tract. This master regulator of epithelial stem cells turns out to be the p63 gene, a close relative to the well-known tumor-suppressing p53 gene. W...

Intelligent materials to regenerate bone tissue

...ecnalia with the help of others, is working on the regeneration and repair of bone tissue. Seven other bodies, lea...al functions of the damaged bone while the desired regeneration takes place. The solutions have to be capable, moreover, of remedying particularly serious damage...

Fast and slow -- How the spinal cord controls the speed of movement

...function of nerves in spinal cords. With regard to regeneration of spinal cords following injury, for example, medical researchers need a template for a normal spinal cord in order to know if nerves are re-growing normally, Fetcho said. In Parkinson’s disease, researchers believe that a neurotransmitter releas...

Study shows isolation of stem cells may lead to a treatment for hearing loss

...rt is now we can test compounds that could promote regeneration of hair cells from these precursor cells in vitro, we can study the genes expressed during the transition from stem cells to hair cells, and we can think of developing strategies for cell replacement, i.e. transplanting these cochlear stem cells into...

The sturdier sex? -- Study by Pittsburgh scientists finds female stem cells work better

...ressing muscle fibers. They then calculated the regeneration index (RI) ?the ratio of dystrophin-positive fibers per 100,000 donor cells. Only one of the 10 male populations of implanted stem cells had an RI over 200. In contrast, 40 percent of the female stem cell populations had an RI higher than 200, and 60...

3 proteins may play important role in nerve-cell repair

...cell growth, differentiation and survival, and the regeneration of long parts of the cell called axons that carry the nerve impulses. Levels of cAMP drop in mammalian nerve cells as they mature, and this is thought to explain, in part, why mature nerve cells cannot regenerate damaged axons. "Our findings ...

Liver regeneration may be simpler than previously thought

...hat makes the liver so unique." Although organ regeneration has been observed in many animals, the details of ...s have shown that cells that participate in tissue regeneration behave as if they were part of a growing organ in an embryo. In other words, the cells act as if the...

Stem cell transplants explored at Stanford as a possible treatment for hearing loss

...itory neuroscientists" and points to his stem cell regeneration research as a high priority for the institute. ...romising because it means the genetic program for regeneration exists somewhere in the vertebrate family," Heller said. "We know there is an unknown signal to reg...

Swell gel could bring relief to back pain sufferers

...able microgels that release additives to stimulate regeneration of intervertebral disc tissue. ...

Scientists re-grow dental enamel from cultured cells

...replace damaged or missing enamel, and ultimately, regeneration of whole teeth. ...

Tissue engineering for craniofacial reconstruction

... substitutes that can sustain functionality during regeneration and eventually integrate into the host tissue. The traditional tissue-engineering paradigm combines isolated cells with appropriate bioactive agents in a biomaterial scaffold. It is widely recognized that scaffold architecture can profoundly influenc...

Research project tackles 'regeneration' gap

...in and other diseases by plundering the secrets of regeneration from creatures with remarkable powers of self-rene...organisms that sustain successful tissue and organ regeneration following injury and disease, and then applying this knowledge toward encouraging repair in the more...

How fish mend a broken heart

...tructures. "It is believed that the capacity for regeneration is an ancestral condition that has occasionally be... biologists suspect that the machinery to optimize regeneration from progenitor cells is present, but lies dormant, in mammals." In an earlier study, Poss and his...

Key to zebrafish heart regeneration uncovered

...tective cell layer that covers the wound spurs the regeneration of functional new heart tissue, Duke University Me...us to believe that during the course of evolution, regeneration is something that has been lost by some species, rather than an ability that has been gained by othe...

Dopamine used to prompt nerve tissue to regrow

..., a chemist by training, first ventured into nerve regeneration two years ago, he didn't know that his peers would...s in addition to regrowth. "A successful nerve regeneration will require the nerve to synapse with the target organ," Wang said. "Since we've written this paper...

Diabetes slows nerve recovery after heart transplant

...e no techniques developed yet that speed the nerve regeneration process," he said. Currently, nuclear medicine t...ngel. Future research will need to focus on how regeneration of sympathetic nerves can be facilitated and how changes of the sympathetic nerve integrity in the h...

Scientists show drug can counteract muscular dystrophy in mice

... points out that the drug is only promoting muscle regeneration ?it is not curing the defect that causes muscle deterioration. Further studies are needed to determine how long the drug works and if it works in larger animals with bigger muscles, such as dogs, before such drugs can be tested in people. The findin...

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