Tag: "embryo" at biology news
UT Southwestern researchers discover protein essential to development of heart
...turns on cardiac genes that are expressed from the embryo
stage throughout the life of the organism," Olson said. The scientists studied the function of myocardin by injecting frog embryos with a mutant form of the myocardin protein. As a result, the development of the heart was completely eliminated. The g...
Study reveals differing attitudes to PGD among
...the statement that it was less wrong to destroy an embryo
prior to implantation than it was to destroy a fet... undergoing their first IVF cycle considered every embryo
to be potentially normal since every embryo
to them is regarded as a potential baby." When asked whe...
Doctors perform more IVF treatments, but multiple births decline
...sed during the same period from 29.6% to 26.3% per embryo
transfer. Of these, the proportion of twin delive...ancy rate increased slightly from 26.1% to 27% per embryo
transfer. Dr Nygren said: "The data we have collected shows some interesting trends, particularly in...
Israeli fertility experts call for international chromosome registry
...reening on 65 couples who had experienced repeated embryo
implantation failure and found that a quarter of t...udy had either suffered more than six unsuccessful embryo
transfers or cumulative transfers of more than 15 embryos. They underwent genetic screening as well ...
Sorting the girls from the boys
...chromosome can have a 9 out of 10 chance that the embryo
biopsied will be female. This will significantly i...esult in sufficient embryos for one or more frozen embryo
transfer cycles as well, which means the woman may be able to avoid having to undergo additional IVF...
UNC study pinpoints gene crucial for female embryo survival
...na at Chapel Hill appears to be crucial for female embryo
survival. A study authored by UNC researchers a...ted out that X inactivation also occurs within the embryo
itself, not just in early placental (trophoblast) material surrounding the embryo. However, this occ...
Fish-stocking may spread amphibian disease
...ct toad embryos. This treatment also increased the embryo
death rate by about 15%. While the death rate of fungus-exposed embryos is much smaller in the laboratory than in the wild, this is due to the fact that being exposed to the fungus is not enough to cause an outbreak. Kiesecker and his colleagues had...
UC Davis' first cloned calf born, succumbs three days later
...e appropriate nutrients. Eventually, the resulting embryo
-- which is a genetic copy of the animal that donated the nucleus -- is transplanted into a surrogate mother. The cloning research will continue at UC Davis with a half-dozen other cows now in the very early stages of pregnancy with cloned embryos. C...
Career counseling for embryonic cells
...bout how these processes physically work." As an embryo
develops, different molecular signals instruct cells to produce proteins that will transform the cell into a particular tissue type, such as bone or muscle. QSulf1 functions in progenitor cells, slightly more advanced forms of stem cells that have fe...
From embryo to placenta, gene transfer in primates a success
...mals, the placenta develops in the uterus from the embryo
during gestation. Its role is to provide nourishme...me a gene that has been transferred into a primate embryo
has been shown to be functional throughout development to a successful live birth. It also demonstra...
A new model of cerebral cortex development
...th patterning other parts of the body found in the embryo
cortex, but we did not have an easy way to find ou...ount and position of this signaling protein in the embryo
and look for changes in the cortical pattern much later. The researchers increased the amount of th...
UK researchers raise hopes of preserving fertility for women with cancer
...g girls, or women who require immediate treatment, embryo
freezing is not feasible. But another option - preserving ovarian tissue before treatment and transplanting it into the patient after treatment to reinstate fertility - in addition to being technically difficult, raises concerns that cancer cells lur...
Blood vessels trigger development of the pancreas
...el that lies next to those cells in the developing embryo
-- the endoderm cells began expressing insulin and the gene, Pdx1, which is a known marker of pancreatic differentiation. In experiments using frog embryos, the scientists found that when they removed blood vessels that were adjacent to pancreatic ti...
Student discovers well-preserved embryo in dinosaur egg
...ation in paleontology, says further studies of the embryo
could reveal new clues about dinosaurs and about t...ey live in. It is the first dinosaur egg with an embryo
ever found in the eastern United States. The embryo
is thought to be that of a Lophorhothan, a duck-...
Scientists at UCLAs Jonsson Cancer Center discover gene's role in regulating stem cells in the brain
...lso could provide valuable insight for research on embryo
formation, brain development and in particular for Cowdens disease, which is caused by an inherited mutation in the PTEN gene. Cowdens disease causes patients brains to enlarge abnormally by 10 percent to 15 percent and can lead to mental retardation...
Science steps up on International Space Station with new experiments, fresh crew to operate them
...c production, cancer cell formation, plant growth, embryo
development, biotechnology, and long-term effects of space flight on humans. Research equipment for Expedition Four will be transported both on the STS-108 flight this month and on the STS-110 mission when Space Shuttle Atlantis visits the Station i...
New application of imaging technique can change how scientists look at proteins
...one another. Fibronectin plays important roles in embryo
development, wound healing and other vital biological functions. To explore how fibronectin works from an engineering perspective - why it's strung together like a strand of pearls and how structural changes affect function - Vogel's group labeled t...
Molecule that restricts mouse cells' potency could yield embryonic stem cells without the sacrifice of embryos
...on of pluripotency does not occur properly and the embryo
eventually dies. "The identification of GCNF as a repressor of Oct4 expression opens up several new avenues for understanding Oct4 regulation and, therefore, the control of the pluripotent state," wrote Peter J. Donovan of Thomas Jefferson Universi...
Protein may play role in sex chromosome inactivation
... opens the way to understanding how the developing embryo
chooses which X chromosome to inactivate. The next step is to figure out how this CTCF protein is binding to one X chromosome allele and not the other, she said. In other words, whats recruiting CTCF to the anti-sense Tsix gene? Another central myst...
Scientists describe structures of protein molecules that enable two-way signaling between cells
...the nervous system and other organs develop in the embryo
or perhaps as cancer cells move throughout the body. To describe the structures of the Eph and Ephrin interactions, the researchers first purified both molecules in their interactive form and then grew crystals of the proteins, Henkemeyer said. Then ...
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