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Tag: "rhesus" at biology news

Rhesus monkeys can assess the visual perspective of others when competing for food

...Santos, both from Yale University, have found that rhesus monkeys consider whether a competitor can or canno...ing to steal food. Working with semi-free-ranging rhesus monkeys on the island of Cayo Santiago in Puerto Rico, Flombaum and Santos set up a food competition...

NHGRI targets 12 more organisms for genome sequencing

...ced, such as the chimpanzee (Pan troglodytes), the rhesus macaque (Macaca mulatta) and orangutan (Pongo pygmaeus). Obtaining the marmoset genome sequence will provide a powerful tool to illuminate the similarities and differences among these primate genomes. The second project chosen for its considerable m...

Genetic links could unlock clues to leading cause of blindness

...and German researchers bout a genetic link between rhesus monkeys with macular degeneration and humans could...tic markers for macular degeneration in humans and rhesus monkeys, findings recently published in the online edition of the journal Experimental Eye Research....

Gambling monkeys give insight into neural machinery of risk

...n their experiments, the researchers gave two male rhesus macaque monkeys chances to choose to look at either of two target lights on a screen. Looking at the "safe" target light yielded the same fruit juice reward each time. However, looking at the "risky" target light might yield a larger or smaller juice...

'Shifty-eyed' Monkeys Offer Window Into Brain's Social Reflexes

...searchers compared the eye movements of humans and rhesus macaque monkeys when they were shown images of monkeys looking either to the left or right. The researchers would first concentrate the human or monkey test subjects' attention to the center of a computer screen by showing them a yellow square. The s...

Monkeying around to improve organ transplantation

...ndefinite organ allograft survival in vivo, in six rhesus monkeys. The authors stimulate recipient T cells from the monkeys with donor cells under conditions associated with the development of T cell anergy. Reinfusion of these cells into the recipient after kidney transplantation leads to very prolonged ?...

Monkeys understand numbers across senses

...hip. In their experiments, the researchers played rhesus monkeys the sound of natural "coo" calls made by unfamiliar monkeys, either with two or three animals making the calls. At the same time they gave the monkeys a choice to look at video images of either two or three monkeys. The researchers found that...

Clocking in Pillow Time without the Pillow

...have explored this possibility by giving dog-tired rhesus monkeys a drug shown to improve the functioning of alert brains. They found that sleepy monkeys taking the drug performed tasks better and had increased metabolic activity in several regions of their brains. This suggests that the cognitive effects o...

Noise And Delays Explain Why Some Genes Oscillate In Activity

...have explored this possibility by giving dog-tired rhesus monkeys a drug shown to improve the functioning of alert brains. They found that sleepy monkeys taking the drug performed tasks better and had increased metabolic activity in several regions of their brains. This suggests that the cognitive effects o...

'Perception' gene tracked humanity's evolution, scientists say

...phin genes from chimpanzees, gorillas, orangutans, rhesus macaques, pigtail macaques and guinea baboons. The researchers found that high genetic variation in the prodynorphin promoter was unique to humans. Other primates' promoters were far more homogeneous. Exactly how prodynorphin influences human perce...

Key brain regulatory gene shows evolution in humans

...llas, orangutans, baboons, pig-tailed macaques and rhesus monkeys. They found significant mutational changes in the regulatory sequence leading to humans that indicated preservation due to positive evolutionary selection. They also found an "evolution-by-association," in which sequences near the regulatory ...

Diabetes researchers pioneer islet cell xenotransplantation in primate studies

... Research Center for transplantation into diabetic rhesus macaques using an anti-rejection protocol develope...h affinity derivative of CTLA4-Ig)9-11 on diabetic rhesus macaques transplanted with neonatal porcine islets. ...

Genetic and environmental influences on alcohol consumption among rhesus monkeys

...oholism: Clinical & Experimental Research use rhesus monkeys to examine genetic and environmental influ...urobiology, behavior and alcohol consumption among rhesus macaques. For this particular analysis, study authors investigated factors that may have contribute...

Less is more, gene study shows

...e called MBL1---which is present and functional in rhesus monkeys and chimps as well as mice, but has lost its function in humans---might confer protection against severe bacterial infection in the blood (sepsis). But humans lost that gene so long ago, it was hard to pinpoint the evolutionary forces behind ...

NHGRI announces new sequencing targets

...rimates chosen for this "index species" effort are rhesus macacque (Macaca mulatta), marmoset (Callithrix jacchus) and orangutan (Pongo pygmaeus). In the future, NHGRI intends to add other organisms to the list of index species for which high-density genome sequences are desirable. The third plan includes...

Gene-specific Ebola therapies protect non-human primates from lethal disease

...te the efficacy of the three-PMO combination, four rhesus monkeys were treated with the drug two days prior to Ebola virus exposure. Three of the four were protected from Ebola infection. "These results, while preliminary, are very encouraging," said Colonel George W. Korch, USAMRIID commander, "especially...

A clue from macaques yields evidence for impaired retroviral defense genes in humans

...scovered because the version of TRIM5 possessed by rhesus macaques allows them to resist HIV infection, whereas the human version does not. Instead, the human version appears to respond to evolutionarily older viruses that are related to now-extinct viruses that are resident in the human genome. Previous ...

Most human-chimp differences due to gene regulation ?not genes

...1,000 genes between humans, chimps, orangutans and rhesus macaques ?representing about 70 million years of evolution. To make the samples comparable, the researchers studied tissue from the liver -- one of the most homogeneous sources -- from five adult males from each of the four species. They focused the...

UF scientists test improved gene therapy method for hereditary heart conditions

...enetic cardiac abnormality." Additional tests in rhesus monkeys conducted in conjunction with scientists at the California National Primate Research Center at the University of California at Davis showed that AAV-9 easily passes into the heart muscle in primates after a single intravenous injection, and t...

NHGRI announces latest sequencing targets

...es including the chimpanzee (Pan troglodytes), the rhesus macaque (Macaca mulatta), the orangutan (Pongo pyg...tabolic similarities with humans. For example, the rhesus macaque is an essential research model for drug development, neuroscience, behavioral biology, repro...

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