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Tag: "weeks" at biology news

Life and death in the hippocampus: what young neurons need to survive

...ction of neurons derived from those cells. A few weeks later, animals that received the virus showed fewer fluorescent neurons compared to mice injected with a benign virus lacking the shears, meaning fewer new neurons had survived originating from neural stem cells in which the NMDA receptor had been el...

Researchers identify human DNA on the fast track

...1 region is first produced between the 7th and 9th weeks of gestation in human embryos. Furthermore, the RNA was produced by a Cajal-Retzius neuron, a particular type of cell that plays a critical role in creating the six layers of neurons in the human cortex. Salama then determined that HAR1 actually li...

Novel therapy combinations gain ground in treating hepatitis

...itis C. Previous studies have shown that with 48 weeks of therapy, relapse rates are near 20 to 30 percen...IFN (pegylated interferon alfa 2a) plus RBV for 72 weeks in patients with a prior relapse to 48 weeks of treatment. A total of 81 patients were treated with...

Spinal cord bridge bypasses injury to restore mobility

...r three weeks. . At approximately two and a half weeks into the new nerve growth, Houle implanted a small pump that delivered a steady dose of chondroitinase to a new incision site near C5 where the researchers hoped to reconnect the other end of the bridge to the spinal cord, but also prevent further sc...

Fish virus in Northeast spreading to other fish species

...stic testing. This technique can take two to four weeks to yield results. Cornell researchers are developing a molecular-based test for VHSV based on a specific gene sequence in the virus. Once available, the new technique will cut the turnaround for confirmation to three to five days. Groocock said the ...

Teasing out tissue from blood

...imply supply a bag of your blood and come back two weeks laterto find it turned into cells from other tissues, ranging from brain and liver cells to the insulin-producing beta islet cells of the pancreas. The idea is to revert a patient's blood cells to the stem cell stage and then chemically nudge them ...

UC Davis researchers move biotechnology closer to replacing electronic pacemakers

...cess called transdifferentiation. Studies done two weeks after the injections showed the new nodes were able to take over pacemaking function from the electronic devices. The results also have implications for future stem cell research. Li and his colleagues are now preparing to do long-term, follow-up e...

Long-term changes in experience cause neurons to sprout new long-lasting connections

...o observe the brain as it rewires over a period of weeks or months. This summer Svoboda will move to HHMI's Janelia Farm Research Campus where he will pursue neurobiology studies and projects in optics and microscopy. In the studies reported in Nature, the researchers used mice that were genetically alter...

Matrilin-3 gene discovered to prevent onset of osteoarthritis

...th in the knee joint and throughout the body at 18 weeks of age, the time when mice typically reach peak bone density. Clinical studies in humans have shown that the prevalence of knee and hip osteoarthritis increases with increasing BMD. "Our study reveals an unexpected property of matrilin-3 in maintai...

Many cleaners, air fresheners may pose health risks when used indoors

...o cleans four houses a day, five days per week, 50 weeks per year, would take in about 80 micrograms per day of formaldehyde, double the guideline value set by California's Proposition 65. In addition, the person's intake of fine particulate matter during the hours spent cleaning would exceed the average f...

In-home sensors spot dementia signs in elderly

...noted. Differences were detectable after only four weeks of monitoring. Such differences often are less obvious, if not imperceptible, during a typical clinical examination. In fact, many elders' desire to perform well during doctor visits make them walk faster than their normal daily paces, masking chan...

Mice lacking key immune component still control chronic viral infections

...tion, though, and when we looked at the mice seven weeks later, we were surprised to find the mice making a very robust and effective CD8 T cell response," he says. "This suggests there's an alternate way of generating CD8 T cells." The researchers believe a closely related stand-in for MHC Class I makes...

It's not fair! We are programmed to resist weight loss

...e first group's weight loss during the first eight weeks averaged 3kg but it "plateaued" at week eight and weight loss for the next four weeks was markedly reduced (.7kg). The second group had a variable pattern of weight loss but it, too, s...

Widespread elephant slaughter discovered in Chad

... our first carcass. It was fresh, maybe just a few weeks old, not far from the park headquarters, and the animal's face had been chopped off, the tusks removed. "Two days later we were flying west of that area when we saw a poachers' camp. The second time we passed over I saw a guy and a horse and an ass...

UC Davis study finds HIV hiding from drugs in gut, preventing immune recovery

...ee of the patients were treated during four to six weeks of first being infected with the virus. The other ...tcomes in those who chose to be treated within the weeks of exposure to those with chronic infection. They discovered that newly infected patients had fewer ...

Tetracycline plus teeth equal gray smile

...a prescription dose of fluoride toothpaste for two weeks in order to minimize tooth sensitivity from the whitening solutions. Then, the patient comes in for a one-hour tooth whitening session, where the enamel is painted with the whitening solution and "cured" under a UV light. Then, for every night for th...

Experimental drug reverses key cognitive deficits, pathology in Alzheimer's

...ents, the researchers gave the knockout mice eight weeks of daily doses of AF267B and tested the animals' learning and memory abilities. One test involved measuring how well the treated animals could learn to find a submerged platform in a tank of murky water. This test is known to depend on the function o...

Predicting successful outcomes in living-donor liver transplants

...hough the liver achieves its full size within four weeks of transplant. "Whether the about 10 percent loss of function compared to preoperative values will translate into clinically relevant impairment of liver function ?in particular with respect to drug metabolism as suggested by the authors ?has yet to ...

Prenatal nicotine exposure reduces breathing response of newborns...

... infections. Six of the women delivered before 30 weeks and had a higher risk for possible infections. On...ll study it was one in six of the mothers under 30 weeks and in the overall population could mean many more women with infections that bring on early labor o...

First link of oral bacteria and preterm birth found in human

... infections. Six of the women delivered before 30 weeks and had a higher risk for possible infections. On...ll study it was one in six of the mothers under 30 weeks and in the overall population could mean many more women with infections that bring on early labor o...

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