Tag: "manipulating" at biology news

Cornell Scientists Find Way To Boost Rice Crop Yield -- They'll Walk On The Wild Side

...f boosting land mass -- which we can't do -- we're manipulating the plant's genetics." In the case of rice, there has not been a significant yield increase in two decades. Yet the world's agriculturists are using only 25 percent of the genetic diversity available. In other words, the same types of rice have bee...

Moving DNA Molecules With Magnetic Tweezers

...University, is not playinganelectronic game. He is manipulating molecules in ground-breakingresearch that could lead to new surgical tools and drug deliverysystems. Using Wirtz's device, a physician may soon magneticallymove a microscopic sac filled with cancer-killing medicinethrough a patient's veins, then empt...

Bottom-up Ecological Processes Better For Clear Waters, Study Finds

...st thatthe clarity of a lake could be regulated by manipulating this structureof the food web. For example, putting more large fish in the lake wouldmean more smaller fish would be eaten. With fewer smaller fish swimmingaround looking for dinner, the zooplankton would increase and eat more algae.The algae, in tur...

Malnutrition Impacts Longevity Of Females More Than Males And Shows Gender Differences In Fruit Flies

...e in the age-courseof mortality, can be altered by manipulating environmental conditions,"he added. Collaborating with Carey and Müller on the study were Jane-LingWang and William Capra, both of UC Davis, and Pablo Liedo of the Centrode Investigaciones Ecologicas del Sureste in Tapachula, Mexico. Fundingfor...

Scientists Find New Trigger For Nerve Cell Death

... calcium channel blocker. "These data suggestthat manipulating potassium channels also may provide a new therapeutic strategyfor slowing neuronal degeneration in Alzheimer's disease," Choi says....

Discovery By Fertility Specialist Offers Promise Of Reducing Multiple BirthsTied To Fertility Treatment

...tiple eggs to mature. By manipulating LH and FSH, Sullivan said it could be possible to sustain the growth and development of one or two follicles in women undergoing fertility treatment while preventing multiple ovulations and thus decreas...

Extra Choline During Pregnancy Enhances Memory In Offspring

...esearch could be profound, because we'vefound that manipulating one single nutrient for a few days during gestation hasa lifelong effect on brain function," Swartzwelder said. "In theory, we coulddevelop ways to significantly reduce age-related memory deficits." Swartzwelder said the amount of choline th...

Earlier Human Speech?

...or in most mammals:for the stereotyped behavior of manipulating food to position it for chewing." The researchers found that the canals in humans measured about twice aslarge as those in chimpanzees. The Australopithecus canals proved to beape-sized, but by contrast, the Neanderthal and early human canals...

Cystic Fibrosis Gene Protects Against Typhoid Fever

...s of thehost's immune system," says Dr. Pier. "By manipulating S. typhi or otherorganisms to deliver antigens via the CFTR-uptake pathway, we may be able todevelop better vaccines." In future studies, he and his colleagues will try to define the S. typhi surfacemolecules that bind to CFTR. "It may be po...

Relapsing Fever Spirochete Switches Surface Proteins When It Changes Hosts

...todetermine the role it plays in transmission. By manipulating the genome of therelapsing fever spirochete, they can inactivate the gene that makes the protein. "We want to know," explains Dr. Schwan, "if we knock out the gene making thisprotein associated with transmission, is transmission blocked?" Relapsing f...

Scientists Make Progress Toward Gene Therapy For HIV Infection

...rther groundwork for future efforts totreat HIV by manipulating the immune system," says NIAID Director Anthony S.Fauci, M.D. The NIAID scientists studied 30 sets of identical twins in which one twin wasinfected with HIV and the other was uninfected. HIV-fighting T-cells were takenfrom the healthy twin and genet...

Researchers Identify A Protein Critical For T Cell Development And Activation

...id. He and his colleagues tested thishypothesis by manipulating the gene that produces the SLP-76 protein in culturedcells. The results supported their theory. There are benefits to doing experiments in cell lines in culture but there arealso limitations, so Koretzky did more experiments in mice in which the gene...

Cultured Neural Stem Cells Reduce Symptoms In Model Of Parkinsons Disease

...ormed functioning connections with othercells. By manipulating cells in culture during these crucial stages,researchers could study how complex brain structures are built, damaged, andrebuilt, allowing them to thoroughly test many theories about how theseprocesses occur. Culturing stem cells also will allow res...

University Of Chicago Professor Wins $50,000 Bristol-Myers Squibb Award For Distinguished Achievement In Infectious Disease Research

... so many mechanisms to take them over." In manipulating the genes of HSV to learn their function, Dr. Roizmanhas also devised ways to harness the virus' unique survival abilities to fightother diseases. For example, HSV can use enzymes produced by certain kinds ofcancer cells. Dr. Roizman was able to cr...

A Protein Switch May Turn On Heart Cells To Combat Heart Disease

...While this represents an important step forward in manipulating cells in theheart to grow, MacLellan says researchers still must investigate how the Rb geneworks over time and whether these heart cells will multiply after a stress, suchas heart attack. Extending these studies, MacLellan and colleagues identified ...

Experimental Therapy Makes HIV-Infected Cells Commit Suicide

...folded proteins," he says. By genetically manipulating bacteria, Dowdy's group has made 60 transducible proteins ranging in size up to 110,000 daltons. In contrast, typical drugs are smaller than 800 daltons -- "like the point of a pen compared with a fist," Dowdy says. When small drugs interact...

UCSD And NIH Researchers Isolate Candidates For Genetic Basis Of Human Taste

...eceptor genes provides the groundworknecessary for manipulating the perception of taste and devising methods tostimulate or block taste cell function. The identification also sets the stagefor a comprehensive physiological investigation of how the sense of taste is"wired" from the mouth to the brain. "The identit...

Finding Reveals Broader Role Of Telomerase Enzyme, Suggesting New Target For Extending Life Span Of Cell

...cademy of Sciences, could bolster efforts aimed at manipulating the enzyme fortherapeutic purposes - whether to pr...ability, andoffers a new direction for potentially manipulating the enzyme for therapeuticpurposes. Blackburn's co-discovery of the telomerase enzyme in 1985 spawn...

UCSF Scientists Report On A Transcription Factor That Could Stimulate Heart Cells To Repair Damage Caused By Heart Attacks Or Birth Defects

...is the transition thathCdc5 appears to control. By manipulating HCdc5, Bernstein and his colleagueshope to get heart cells to complete their cycle. "However, there is a lot more to learn about how the hCdc5 protein is regulated,and how it in turn regulates the cell cycle," Bernstein said. Once the genescontrolled...

Researchers Engineer A Way To Improve T-Cell Receptors

...ly other proteins. Their success opens the door to manipulating a virtually untapped portion of theimmune system t...l step." Such a strategy could prove beneficial in manipulating the immune system'sability to bind to infected cells, such as in the case of the AIDS virus orcancer...

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