Tag: "hamsters" at biology news
Study: A little help from friends makes wounds heal faster
COLUMBUS, Ohio New research in hamsters
now suggests that without companionship, wounds on...hat skin wounds healed nearly twice as fast in the hamsters
paired with a sibling. These animals also produced less of the stress hormone cortisol than unpaired...
JCI table of contents, 17 May 2004
... of pathological prion protein PrPSc in muscles of hamsters
orally exposed to scrapie AUTHOR CONTACT: Michael Beekes Robert Koch-Institut, Berlin, Germany. Phone: 49-30-4547-2396; Fax: 49-30-4547-2267; E-mail: BeekesM@rki.de View the PDF of this article at: https://www.the-jci.org/press/21083.pdf ******...
Breaking the rules on artifical blood
...y, DOI: 10.1152/japplphysio.00530.2003). Tests in hamsters
that had lost a lot of blood showed they actually fared better when given MP4 than real blood (Critical Care Medicine, vol 31, p 1824). The animals needed less MP4 than real blood to oxygenate their tissues. The researchers think this is because it r...
Steroid use causes long-term agression, NU report indicates
...serotonin. In their experiments, adolescent Syrian hamsters
- given their similar brain circuitry to human adolescents were administered doses of anabolic steroids and then measured for aggressiveness over certain periods of time. The researchers initially hypothesized that steroid use during adolescence mig...
Experimental hantavirus vaccine elicits strong antibody response in primates
...uman primates that received the vaccine, protected hamsters
from disease even when administered 5 days after e...ody response elicited by the vaccine could protect hamsters
from lethal hantavirus infection. The team had already developed a lethal-disease model of Andes vir...
Scientists find the pathological prion protein in skeletal muscles of hamster with scrapie
... in a wide range of skeletal muscles after feeding hamsters
with prion-infected food. PrPSc is believed to be ...akob disease in humans. The researchers fed Syrian hamsters
with food pellets that contained mashed-up brain tissue from scrapie-infected hamsters. These hamste...
Sudden removal of fat impairs immune function in rodents, biologists find
...dult male prairie voles and 36 adult male Siberian hamsters
into three experimental groups. The individuals fr...wn to induce a strong immune response in voles and hamsters
without making the animals sick. After a few days, the researchers measured each rodent's bloodstrea...
Researchers find genes connected to seasonal reproductive clock in hamsters
...al clock that determines when hamsters
reproduce. While researchers... reproductive organs of the hamsters
respond by shutting down. In the male hamsters
used in thi...
UCSF-led team reports new test improves detection of prions in animals
...eripheral tissue such as muscle. Early evidence in hamsters
and mice suggest this might be possible. In this case, the test could also potentially be used to diagnose patients with one of the several human forms of prion disease, known as Creutzfeldt-Jakob disease. The need for a more sensitive test The n...
American Society for Microbiology Journals tipsheet: September 2002
... effects of these bacteria on the cheek pouches of hamsters
and found that they cause inflammation of the lining of the mouth. "These data indicate that Bacillus species contaminate chewing tobacco commercially available in the United States and elaborate a potent exogenous virulence factor that injures the o...
Research links adolescent steroid use to reduction in serotonin, altered signaling
...d a "high dose" of anabolic steroids to adolescent hamsters
over the course of a month, a period corresponding... years repeated dosage in human adolescents. Those hamsters
given steroids were, as other studies have shown, more aggressive than those not treated with steroi...
Some animals can recognize degree of kinship by scent
...l psychologist, Robert E. Johnston, had shown how hamsters
use their abilities for "self-referent phenotype matching" (also known as the "armpit effect") to compare other animals' odors to their own and to distinguish strangers from unfamiliar kin. This time she hoped to show that a different species ( Spe...
UT Southwestern researchers link human lymphomas to polio vaccine tainted with monkey virus
...aid the findings fully confirm earlier research on hamsters
that associated SV40 with brain and bone tumors, mesotheliomas (tumors in the lining of the lungs and other organs) and B-cell lymphomas. SV40 previously had been associated in humans with brain and bone cancer and mesothelioma, but the human lymphom...
Symptoms of illness less severe in hamsters during winter, study finds
...short days of winter, Siberian hamsters
suffer less severe symptoms to infections than the...inter daylight conditions, the hamsters
resumed normal eating patterns sooner after infection, and cytokine ...
Vaccine protects against fatal West Nile complication
...encephalitis (JE) for their its ability to protect hamsters
from the fatal encephalitis (inflammation of the b...his study Tesh and his colleagues first inoculated hamsters
with one of three flavivirus vaccines: a live-attenuated JE vaccine currently used on millions of p...
Study examines how prion disease adapts to new species
...s by which a disease called scrapie transfers from hamsters
to mice. "We found that the adaption is a prolonge...ent by injecting brain extracts from the mice into hamsters
and watching to see if the hamsters
came down with scrapie. "All of the hamsters
got scrapie, so we...
Both smells and pheromones may arouse instinctive behaviors in mammals
...nce then, he has identified pheromones in rats and hamsters
as well. His current emphasis is on the neurochemistry of neurons in the VNO and OE. He is the leader of interdisciplinary studies that bridge the physical sciences, life sciences and social sciences, including chemistry, neurobiology, psychobiology,...
Brain-development timeline for mammalian species
...in development across nine mammalian species, from hamsters
to humans. They have, for example, pinpointed the date after conception when the cells that make up the retina of the eye are formed. The neurobiologists found pretty much what they expected -- an evolutionarily conserved pattern of sequence and timi...
Memory, forgetfulness help hamsters time breeding
... that scientists had previously theorized that the hamsters
were simply responding to their immediate circumst...ticated -- Prendergast and others wondered how the hamsters
made sure the memory they used as a cue was in fact the most recent one. Working at the University o...
Northwestern team identifies first enzyme in mammalian circadian clock
... hamsters. The researchers bred a normal strain of hamsters
with the tau hamsters, and then tested the offspri... The animals broke down in to three groups. Normal hamsters
had a 24-hour sleep-wake cycle; hamsters
with one mutant tau gene (heterozygous) had a 22-hour cycle...