A 'repulsive' protein guides blood vessel development
...xpression of Sema3E protein in specific regions of chick embryos prevented vascular growth into those areas. "Sema3E is a very potent chemorepellent for developing blood vessels," Ginty noted. "So, one possibility is that drugs that mimic this function could be useful in preventing growth of the new blood ...Scientists discover how climate change causes the simultaneous boom or bust of multiple populations
...these effects -- rather than the direct effects on chick survival -- are the major factor driving grouse populations into synchrony," Hudson reports. "We previously had discovered the temporal mechanism -- that the parasites affect the size of individual populations of the Red Grouse. Now, in this paper,...Researchers peer inside embryonic/fetal hearts to discover causes of congenital heart disease
...In some cases, Dr. Keller turns to the embryo of a chick or a mouse to shed light on how the heart function...r's lab also are using heart muscle cells from the chick and mouse embryos to regenerate "tissue-engineered" heart tissues in order to understand how the mec...Joslin Diabetes Center announces new nutrition guidelines
...cts and legumes such as kidney beans, black beans, chick peas and lentils. Weight Loss Guidelines: A modest weight loss of one pound every one to two weeks is advised. Reducing daily calories should be by 250 to 500 calories; total daily calories should not be less than 1,000 to 1,200 for women and 1,20...Brain chemical serotonin involved in early embryo patterning, Forsyth scientists find
...ults, the study, which was carried out on frog and chick embryos: Provides the first molecular support for the idea that serotonin is utilized as a large-scale left-right patterning mechanism, thus offering new insight into the basis of position of the heart and other asymmetric, visceral organs. Identi...The lopsided brain: Attention bias is shared by humans and birds
... researchers tested two bird species, the domestic chick and the pigeon, for their performance on a task in which they were allowed to freely peck at grains of food that were spread evenly in an area before them. Though the birds' bodies were positioned at the midline of the search area, both chicks and pi......- to create a detailed 3-D map of the synapse of a chick ciliary ganglion. This ganglion is a cluster of neurons that connect the brain to the iris of the eye. It launches the neurotransmitter acetylcholine from sac-like vesicles across the synapse to two types of receptors, called alpha 7 and alpha 3. Sej...Salk scientists overturn a dogma of nerve cell communication
...ing signal transmission at a particular synapse in chick embryos. The computer model convinced Sejnowski an...ly accurate computer model simulation of the giant chick embryo synapse that connects nerve fibers originating in the brain with the neuron that controls the...Molecular mechanism of feather formation found
...to form in the tufted branches of the simple downy chick feather. The two proteins, which tend to play off ...of either Shh or Bmp2 into the skin of six-day-old chick embryos. The virus infected only small patches of cells and allowed Harris to locally examine the ef...Simple explanation for complex pattern of feather development
...or the inhibitor, Bmp2, in the skin of six-day old chick embryos by injecting them with a retrovirus. The results were seen in localized patches and demonstrated that a simple relationship between developmental genes could be the basis for formation of feather structures. This was the first documentation, ...First production of human monoclonal antibodies in chicken eggs published in Nature Biotechnology
...gg white. The stem cells were then introduced into chick embryos. At this stage of development, the embryonic stem cells can make significant contributions to the developing chicken. Resulting chimeras with large contributions from the stem cells lay eggs containing milligram amounts of antibody, which is ...Penguin chicks exposed to human visitors experience spike in stress hormone
...n two weeks before fledging, which occurs when the chick is about 75 days old. None of the chicks demonstrated an elevated baseline corticosterone level. But 30 minutes and 60 minutes after capture, newly hatched chicks regularly visited by humans had levels more than three times higher than undisturbed c...Looks matter to female barn swallows
...arn swallows typically care for at least one young chick that was actually fathered by another bird. The researchers used this widespread phenomenon of cheating to test the factors that may keep a female barn swallow faithful to her mate. Sometimes males even rear an entire nest of illegitimate young. Afte...New possibilities for flu antiviral and vaccine research emerge from 'Spanish flu' virus
...s. Then they studied the viruses' effects in mice, chick embryos and human lung cells and identified the constellation of genes that was responsible for the Spanish flu virus' extreme virulence. One gene associated with high virulence was the HA gene, which encodes the hemagglutinin surface protein that h...A fatty acid found in milk may help control inflammatory diseases
...eemed at first to be a simple question: Why does a chick or any other animal raised in a germ-free environment grow faster than one raised in a conventional environment? "In animal agriculture, you can see as much as a five to ten percent difference in weight at a given age in a growing animal because a s...Scientists crack code for motor neuron wiring
...essed by motor neurons that project to the wing in chick embryos. "It became clear that these proteins weren't randomly expressed, but were expressed in highly precise patterns that corresponded to anatomically-defined motor neuron pools," said Jessell. Dasen's functional analysis revealed a Hox coding hie...Removing egg from nest may help save endangered whooping crane
...r-parenting" program. Cranes usually rear a single chick and the other dies to siblicide or is killed by a ...n our paper." Boyce suggests several reasons why a chick might survive when an egg is removed from a nest. Sibling aggression has been so strong that some ch...Transporters for the brain chemical serotonin provide
...cked, normal development was disrupted in frog and chick embryos. In particular, left-right asymmetry, the process through which cells "know" which side they are on as they form body organs such as the heart and liver, is controlled by serotonin transporters. Michael Levin, PhD., Associate Member of the ...Stowers scientists demonstrate mechanism of vertebral formation
...ation of the vertebral precursors in the mouse and chick embryo. The findings, which were published in the March 7 issue of Developmental Cell, indicate that the genes governing many cellular properties are downstream of the segmentation clock, the mechanism that controls the formation of the vertebr......, cells transplanted into the neural tube lumen of chick embryos were later found in the MMC m and either selectively projected axons with the dorsal ramus to epaxial muscle targets or, interestingly, misprojected axons to skin targets. Whole-cell recordings showed that cells transplanted in ovo had ele...