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Tag: "movement" at biology news

Wisconsin scientists grow critical nerve cells

... the brain and spinal cord, dictating almost every movement in the body from the wiggling of a toe to the rolling of an eyeball. The new development could one day help victims of spinal-cord injuries, or pave the way for novel treatments of degenerative diseases such as amyotrophic lateral sclerosis (ALS), al...

Neuronal 'traffic jam' marks early Alzheimer's disease

...down in neurons that appears to prevent the normal movement of critical proteins to the communications centers of the nerve cells. In a vicious cycle, the traffic jam also could increase production of an abnormal protein that clogs neurons, leading to their failure and eventual death. The researchers said th...

Research on Worms Yields Clues on Aging

...tinued to display the youthful traits of fast body movement and fastpumping of mouthparts during the latter phase of their extended lives.Further tests showed that the anticonvulsants stimulated transmissionof signals in nerves that control body movement.Scientists previously had found genetic mutations in C....

Spider Venom Could Yield Eco-Friendly Insecticides

... with insect ion channels. (Ion channels allow the movement of ions -- small charged molecules -- across cell membranes.) His next challenge is to use this information to design insecticides that specifically target insect pests without affecting vertebrates. One approach is to create chemical insecticides t...

Poplar trees redirect resources in response to simulated attack

...e it is quickly converted to sugar, and traced the movement of this radiolabeled sugar through the plants using autoradiography and other techniques. Autoradiography allows for taking a snapshot in time showing the precise location of the radiotracer within the plant. With this and other techniques, the scien...

Purdue proves concept of using nano-materials for drug discovery

.... Membranes, which surround cells and regulate the movement of molecules into and out of the cells, contain a variety of proteins, some of which are directly responsible for cancer's ability to resist anti-tumor chemotherapy drugs. These proteins act as tiny pumps that quickly remove chemotherapy drugs from t...

Vital step in cellular migration described by UCSD medical researchers

A vital molecular step in cell migration, the movement of cells within the body during growth, tissue rep...with a protein called paxillin creates directional movement of a cell by inhibiting a protein called Rac. "Understanding how this protein contributes to direct...

Gene Therapy For Parkinson's Disease Moves Forward In Animals

...everal years, but then it actually starts creating movement problems,?Mandel said. “Our idea is that instead of taking pills that create detrimental fluctuations of L-dopa levels, a continuous, therapeutic dose would be better for you. As for efforts to reverse impaired movements in rats, scientists used 33 ...

The BIOS Initiative - open source biotechnology is born

... they function. "These tools are seeding a growing movement ?the BIOS Initiative ?that will enable researchers, even in the poorest countries in the world, to be partners in the choice and development of the crop improvement technologies best suited to their own priorities", says Richard Jefferson, founder an...

Scientists discover that host cell lipids facilitate bacterial movement

...teria." The researchers also noticed that Listeria movement slowed down when the bacteria were treated with molecules that inhibited PI3-kinase, proving that Listeria depend on PI3-kinase to move. "Our studies show that Listeria is capable of inside-out signaling," explains Dr. Southwick. "Most signals arise...

Gene therapy for Parkinson's disease moves forward in animals

...everal years, but then it actually starts creating movement problems," Mandel said. "Our idea is that instead of taking pills that create detrimental fluctuations of L-dopa levels, a continuous, therapeutic dose would be better for you. As for efforts to reverse impaired movements in rats, scientists used 33...

50-year-old Mystery Solved: Protein Tags Regulate Key Ion Channel

... to the 1950s: How do cells control the background movement of potassium ions across the cell membrane? This process is important because the flow of potassium ions determines whether "excitable" cells in the brain, heart and skeletal muscles "fire," sending out nervous impulses that become thoughts, heartbea...

Researchers discover chemical compounds that affect plant growth

...ct on plant growth, which is closely linked to the movement of proteins through plant cell membranes, a proces...o 4 chemicals, which affected gravitropism and the movement of proteins through membranes within the plant cell. . Only one of these resembled auxins, a plant-...

Shutting down the HIV assembly line

...ng anti-HIV drugs disrupt particle assembly or the movement of Gag in the cell. "We have hopes of identifying compounds that inhibit this Gag-AP-3 interaction and that may lead to new efforts to treat HIV infection," Spearman said. Such drugs should be very specific, he said, since it should be possible to ...

UN environmental agency steps up battle against marine pollution

...us and other wastes. The Convention regulates the movement of hazardous waste and obliges its members to ensure that such wastes are managed and disposed of in an environmentally sound manner. It covers toxic, poisonous, explosive, corrosive, flammable, ecotoxic, and infectious wastes that are being moved fr...

Internet viruses help ecologists control invasive species

...ead and MacIsaac examined patterns of human vector movement to see whether some invaded systems have the potential to develop into invasion hubs. According to Muirhead and MacIsaac: "Some lakes invaded by the spiny water flea may serve as invasion hubs if departing boaters and anglers travel to large numbers...

Penn Researchers Use Robotic Surgery

...inci System, the optics and fluidity of instrument movement are just amazing," adds Hockstein. "It has the potential to add great precision to our surgical treatment of a variety of diseases of the head and neck. ...

Two new retroviruses—transmitted from animals—identified

...inci System, the optics and fluidity of instrument movement are just amazing," adds Hockstein. "It has the potential to add great precision to our surgical treatment of a variety of diseases of the head and neck. ...

Natural Killers Could Lead to New Hepatitis Treatments

...s observed that the roving NKT cells stopped their movement when alerted by a foreign protein, called an antigen, “We think this is a reflection of their normal function of searching for antigen,?said Littman. “Whenever there is detection of antigen reflecting some kind of damage or local infection, the cell ...

Pair of cancer genes found to drive both cell migration and division

...found that two genes already known to control cell movement are also needed for proper cell division. They report their findings in the April issue of Developmental Cell. The researchers discovered that the two genes are required for a dividing cell's halves to separate, raising the possibility that interfer...

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