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Tag: "mature" at biology news

Dopamine drug leads to new neurons and recovery of function in rat model of Parkinson's

...the newly generated cells appeared to develop into mature neurons, and approximately 28 percent of them appeared to be dopamine neurons by 8 weeks after treatment. Animals treated for 8 weeks also developed almost 75 percent of the normal number of neuronal connections with other parts of the brain and sho...

Bioengineered tissue implants regenerate damaged knee cartilage

...ates that engineered cartilage tissue can grow and mature when implanted into patients with a knee injury. ...ssue-engineered cartilage implanted into knees can mature within 12 months after implantation, even in joints showing signs of osteoarthritis. "Left untreat...

UCLA researchers develop T-cells from human embryonic stem cells

...genetically manipulated and coaxed to develop into mature T-cells, raising hopes for a gene therapy to comba...ntrol the development of embryonic stem cells into mature T-cells, said study co-author Jerome Zack, associate director of the UCLA AIDS Institute, and profes...

Study provides first look at the 'birth' of a retina cell

...e can watch them at each step as they develop into mature and functional rods." Kellogg scientists then purified the rods at various stages and generated the profile of genes at each stage. This, for the first time, provided a handle for investigating the precise process of rod differentiation. Rods, alon...

Fire ants: Their true story told by the scientist who loves them

... beginnings. And size matters, says Tschinkel. In mature colonies, unusual variability known as polymorphis...hinkel has counted them but says it's not easy). A mature colony can encompass approximately 300 feet of underground foraging tunnels ?about 20,000 ant body-l...

Acid rain causing decline in sugar maples, say researchers

...lly greater around the roots of both seedlings and mature sugar maples in the treated plot. Future research will explore the relationship between mycorrhizae and acid rain. Though pollution-control legislation has helped reduce sulphuric acid by one-third since its high point in the 1960s, nitric acid fr...

Gene therapy prevents the onset of diabetic symptoms in mice

...lly greater around the roots of both seedlings and mature sugar maples in the treated plot. Future research will explore the relationship between mycorrhizae and acid rain. Though pollution-control legislation has helped reduce sulphuric acid by one-third since its high point in the 1960s, nitric acid fr...

Striking the right balance between excitation and inhibition

...al cord arise from a common progenitor cell. Since mature neurons can be either excitatory or inhibitory, the researchers asked how a single parental progenitor cell could produce both excitatory and inhibitory daughter cells, and how approximately equal numbers of each daughter cell are produced. In a st...

Fat stem cells being studied as option for breast reconstruction

... to these beads and are able to differentiate into mature fat cells. When injected under the skin in a rat model, the cellular combination eventually formed what they describe as a "mound" of tissue. The fat-derived stem cells being used in the study are obtained from breast cancer patients. "We need...

Stormy days ahead for coral reefs

...ng," says Dr Connolly. "They also tend to grow and mature quickly, so the species can recover before the next big storm arrives." However, one effect of the increased production of greenhouse gases is an increase in the acidity of the ocean. This is likely to reduce the stability of coral reefs, and...

New neurons could act to alleviate epilepsy

...e epileptic animals had all the characteristics of mature dentate gyrus cells. However, they found that neurons born into an epileptic environment, compared to the physiological running environment, showed reduced excitatory connectivity to other neurons, as well as increased inhibitory connectivity. Such d...

Coral reefs are increasingly vulnerable to angry oceans

...oung," said Connolly. "They also tend to grow and mature quickly, so the species can recover before the next big storm arrives." However, one effect of the increased production of greenhouse gases is an increase in the acidity of the ocean. This is likely to reduce the stability of coral reefs, and a...

A new male-specific gene in algae unveils an origin of male and female

...es a protein localized abundantly in the nuclei of mature sperm. The findings indicate that P. starrii maleness evolved from the dominant sex (MT-) of its isogamous ancestor. This breakthrough in understanding provides an opportunity to address any number of extremely interesting questions regarding evoluti...

Stem cell activity deciphered in the aging brain

...ying "fresh" in case they were recruited to become mature nerve cells. They found that in young rats, approximately 25 percent of the neural stem cells were actively dividing, but only 8 percent of the cells in middle-aged rats and 4 percent in old rats were dividing. This decreased division of stem cells...

Advance helps explain stem cell behavior

...lopment by a pattern formation mechanism, and then mature more slowly as the central nervous system creates the functional neural circuits. Understanding this pattern formation mechanism will be essential to the ultimate use of stem cells in medical research and disease treatment, the scientists said. Ide...

Single molecular 'mark' seen as pivotal for genome compaction in spores and sperm

...ed and then halved on the way to the production of mature gametes or spores. Near the end of the process, th...erstand genome compaction during the production of mature sperm." The molecule in question is a phosphorous molecule that modifies a histone. Histones are re...

For crickets, parasitic flies can stop the music

...e dying cricket, they pupate and metamorphose into mature flies. Brockmann and co-author Manuel Vélez, a former UF student who earned his doctorate in 2004, hypothesized that the presence of flies would affect how male crickets sing and how females respond. Examining wild crickets native to North Florida...

'Trojan Horse' agent halts bone metastasis in mice

...ding VEGF, the pre-osteoclasts differentiated into mature osteoclasts and chew up bone tissue, providing the tumor new space to grow. The mature osteoclast cells themselves do not express the Flt-1 receptor. According to Rosenblum, the VEGF1...

Some butterflies travel farther, reproduce faster

... individual butterflies to determine the number of mature eggs they carried. "The females from the new pat...elop very quickly," Fescemyer said. They developed mature eggs sooner (three days after emerging from the pupa) which could enable them to mate and lay eggs s...

Detailed 3-D image catches a key regulator of neural stem cell differentiation in action

...egulates the transition from neuronal precursor to mature neuron," explains senior author Joseph Noel, Ph.D, a Howard Hughes Medical Institute investigator at Salk. "Loosening the brake with an inhibitor would allow us to influence the timing of neuronal differentiation," he adds. A finely tuned network...

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