Tag: "embryonic" at biology news
Jefferson scientists develop method to isolate blood stem cells, the lifetime source of all blood cells
...at low levels onCD34-positive progenitor cells. In embryonic
life, primitive hematopoietic cellsare made in close contact with KDR-positive endothelial cells. They argued thatKDR may represent a marker for hematopoietic stem cells after birth. They found an antibody that recognized the KDR receptor and...
UD News: Gene-repair pioneer, Eric Kmiec, brings his lab to the University of Delaware
...ons'national reputation and their ongoing study of embryonic
and tumor-celldevelopment, which Kmiec describes as "among the best anywhere," were centralselling points, he adds. (Already, Kmiec plans a joint effort with the Carsonsto alter certain cellular events involved in the development of breast, melanomaa...
Stem cells may be powerful gene shuttle
...rties of theadult stem cells they have isolated to embryonic
stem cells, which are known tobe able to give rise to a broad range of tissues. Embryonic stem cells are nowbeing studied for use in tissue transplantation "Perhaps such breadth is not necessary," Mulligan noted. "It might be thatdifferent adult ste...
Researchers say hormones are key to evolution of insect metamorphosis
... suggests that achange in hormonal function during embryonic
development led to the evolution ofa unique larval...venile hormones play such an important role in the embryonic
and larvaldevelopment of metamorphosing insects that they have been used as the basis forinsecticide...
New University of Georgia study indicates possible ancient origin for retroviruses, the class to which HIV belongs
...pable of rudimentary learning.Its life starts with embryonic
cleavage, it grows and develops, ages and dies.All of these functions are controlled by genes. The worms are no more than onemillimeter long and live only two or three weeks. And yet they have become enormously important to scientists, especi...
New paleontology research from Natural History Museum of L.A. at international conference
...round for several miles -- but it is thefirst time embryonic
remains of sauropod dinosaur skin have been discov...erarea more than 200 eggs, many of them containing embryonic
remains. He has foundthat the dinosaur eggs were laid in clutches that were close together andrandom...
Alzheimer protein found critical to brain development
...2. These mutant mice do not survive past the early embryonic
stage of development due to multiple defects, including brain development. "The study shows that the same proteins that malfunction late in life have a key role in the beginning of life," said study author Dr. Alan Bernstein, director of the Samuel L...
Key developmental genes identified, linked to rare syndrome
...tified two genes that are crucial to a key step in embryonic
development and also have shown that the human ver...novo" methylation takes place, establishing a new, embryonic
pattern. As cells in the developing embryo reproduce, newly synthesized DNA continually is remethyl...
New tool for comparative gene studies
...cientists to introduce desired genes directly into embryonic
cells using the baculovirus, which normally infect...n genes into frog and beetle, as well as fruit fly embryonic
cells and believes the virus will prove effective in a wide range of other species. The results of h...
A molecule family hinders spinal cord regeneration, UF brain institute team finds
... UF began a small trial testing the feasibility of embryonic
nerve tissue transplants inhumans for spinal cord injury. While it is too early for results from that study, the work speaks to apotential for regeneration that only recently seemed like a pipe dream. "Up until 20 years ago, it was thought that spin...
DFG to set up 21 new collaborative research centres in 2000
...ganism. These processes not only form the basis of embryonic
development -- false regulation can lead to developmental disorders and malformations -, but they are also indispensable for the adaptation and regeneration of tissue and organs which are already fully formed. The scientists intend to conduct compara...
Zebrafish's powerful heart gene could lead to transplant therapy
...mice and humans. The gene, known as gata5, acts in embryonic
cells, which are primordial,unspecialized cells that form in the earliest stage of embryonic
developmentand are genetically programmed to evolve into one of many specialized celltypes, such as ...
Scientists figure out how cells' tiniest motors work
...separate chromosomes when cells divide, distribute embryonic
material and haul precious cargo in everyorganism from protozoa to people. Led by the UC San Francisco scientist who discovered this protein motor called kinesin in 1985,the researchers have now scrutinized and measured how the motor changes shape, ...
Human stem cell research leads Science's top ten list of the best scientific advances in 1999
...ue, new federal rules suggest that the climate for embryonic
stem cell research may be beginning to thaw. And there are few ethical concerns regarding stem cells from adults, which may also provide fodder for important therapies. These cells, which supply new cells to parts of the body with high cellular turn...
Mouse embryo hints at how mammalian body forms
...in the future in regulating the differentiation of embryonic
stem cells. The investigators, including Camb...from the inner cell mass, which also gives rise to embryonic
stem cells. Embryonic stem cells are developmentally flexible cells that can be grown in culture fro...
Common enzyme deficiency may jeopardize pregnancies
... the healthy development of embryos. Without G6PD, embryonic
cells are susceptible to damage caused by reactive... a drug that produces reactive oxygen species, the embryonic
death rates and incidence of birth defects in the surviving fetuses went through the roof, although ...
Scientists develop most efficient mouse cloning strategy to date, create transgenic clone
... Research, report that they have successfully used embryonic
stem cells to clone mice with the highest efficien...t it is possible to modify the genetic material in embryonic
cells before using these cells to clone new animals. The scientists inserted a gene derived from th...
New institute formed to distribute human stem cells
MADISON -- In an effort to move human embryonic
stem cell technology into the mainstream of academ... developmental biologist in whose laboratory human embryonic
stem cells were first isolated. Thomson will remain on the Wisconsin faculty, however. "Our intentio...
Photoreceptor gene mutations cause degenerative eye disease
...signaling pathways that determine cell type in the embryonic
retina." Right now, researchers do not know how precursor photoreceptors reach their ultimate cell type. "ESCS is interesting in what it might imply for how photoreceptor pattern and fate gets set up in the eye," says Contance Cepko , an HHMI inve...
UCSF researcher reports on protein therapy to reverse facial birth defects
... vitamin A suppress sonic hedgehog activity in the embryonic
facial tissue. Since at least some dietary vitamin A is essential for normal fetal development, Helms and her colleagues wanted to study the effects of a vitamin A deficit. They treated developing chicken embryos with a molecule that blocked the v...
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