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Tag: "unfertilized" at biology news

Scientists clone mice from adult skin stem cells

...To execute the nuclear transfer procedure, Li took unfertilized mouse oocytes and replaced the nucleus of each oocyte with a nucleus from these adult skin stem cells. A main hurdle in nuclear transfer with adult cells has been its efficiency ?out of a hundred attempts, only a handful may succeed ?with reporte...

Cloned mice created from fully differentiated cells, a milestone in cloning research

...n a reproductive cell ?and transferring it into an unfertilized egg that has had its chromosomes removed. Because the resulting new embryo contains the entire genome of the donor somatic cell it is an identical copy. This cloned embryo is then implanted into a surrogate mother, and, if the process is successful, ...

Cracking the egg

...t fundamental and important is the transition from unfertilized egg to fertilized embryo. Think about it: The former is and will remain an egg if left alone, while the latter has within it the means to unleash the dazzling cascade of events needed to create a viable organism. What's already in the egg that enab...

Why do some queen bees eat their worker bee's eggs?

...with ovaries, who although unable to mate, can lay unfertilized eggs which turn into males if reared. For some species, such as bumble bees, this is the source of many of the males in the species. But in others, like the honeybee, workers "police" each other ?killing eggs laid by workers or confronting egg-laying...

Scientists crack genetic secrets of human egg

...te a human being. Combined with technology, the unfertilized egg might be coaxed to produce other specific cell...h researchers in Chile to extract the RNA from the unfertilized eggs soon after they were harvested. That material (atreasure of genetic information,) was frozen an...

Researchers create genetically matched embryonic stem cells for transplantation

... mice, the work establishes the principle of using unfertilized eggs as a source of customized embryonic stem cell...ue. "However, generating embryonic stem cells from unfertilized eggs is far more efficient than nuclear transfer, and therefore may allow us to move toward human ap...

Researchers report technique for freezing and preserving genetically enhanced pig embryos

...eezing swine embryos by first removing lipids from unfertilized eggs before fertilizing them with muscle cells from a male pig containing modified genetic material. The resulting embryos were then frozen at the blastocyst stage. Upon thawing, embryos were transferred to surrogate female swine. Embryos placed in ...

With few factors, adult cells take on character of embryonic stem cells

...es showed. Those findings provided evidence that unfertilized eggs and embryonic stem cells contain factors that can confer pluripotency to differentiated cells, Yamanaka said. "We hypothesized that the factors that play important roles in the maintenance of embryonic stem cell identity also play pivotal role...

With few factors, adult cells take on character of embryonic stem cells

...es showed. Those findings provided evidence that unfertilized eggs and embryonic stem cells contain factors that can confer pluripotency to differentiated cells, Yamanaka said. "We hypothesized that the factors that play important roles in the maintenance of embryonic stem cell identity also play pivotal role...

Researchers now able to look deep into heart to view triggers of a heart's beat

...zed eggs become females. But the development of an unfertilized egg into an adult (called parthenogenesis) remains...ry nuclei seed the formation of new centrosomes in unfertilized eggs," said Patrick Ferree, a graduate student in molecular, cell, and developmental biology at UCSC...

Insects that produce males from unfertilized eggs reveal a surprising cellular feat

...zed eggs become females. But the development of an unfertilized egg into an adult (called parthenogenesis) remains...ry nuclei seed the formation of new centrosomes in unfertilized eggs," said Patrick Ferree, a graduate student in molecular, cell, and developmental biology at UCSC...

Researchers devise new technique for creating human stem cells

...be used along with SCNT, which involves the use of unfertilized human eggs -- technical hurdles must be cleared be...which are more plentiful and easier to obtain than unfertilized human eggs. In the studies published in Science , the researchers combined human fibroblast cells ...

SuperLigands - a database of ligand structures derived from the Protein Data Bank

...s and did not have a parthenogenetic origin, where unfertilized eggs can divide on their own. Hwang and colleagues report that the cells are chromosomally normal, self-renewing and "pluripotent" ?meaning they have the ability to form the three major types of cells in the early embryo that give rise to all other ...

Scientists generate patient-specific stem cells, Science study says

...s and did not have a parthenogenetic origin, where unfertilized eggs can divide on their own. Hwang and colleagues report that the cells are chromosomally normal, self-renewing and "pluripotent" ?meaning they have the ability to form the three major types of cells in the early embryo that give rise to all other ...

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