Tag: "embryo" at biology news
Mouse Study Trumpets New Way To Preserve Species
... "Using methods such as in vitro fertilization and embryo
transfer for an animal requires detailed knowledge about the animal's physiology and how its reproductive tissues respond in various situations. Generally, this work must be done on a species-by-species basis." The current findings also suggest ...
When One Gene Has Two Roles, Its Second Function May Be Missed
...ood cells is later activated in other cells of the embryo
to form thegenitourinary tract. Disorders in the g...al function, the first lethaldefect will abort the embryo
before the second defect manifests. "The mouse embryo
may be lost early in gestation before the seco...
First Dinosaur Embryo Skin Discovered -- Unhatched Embryos Are First Ever Found Of Giant-Plant Eating Dinosaurs
...teeth in the eggs providesan intriguing clue. One embryo
alone has at least 32 individual pencil-shapedteeth, each small enough to fit easily into the capital "O" at the beginning ofthis sentence. The only sauropod dinosaurs alive at the end of the Cretaceousperiod with teeth this shape were sauropods kno...
Montana State University Scientist Contributes To Latest Dinosaur Discovery
...centnews that scientists had found a rare dinosaur embryo
in the Patagonia region ofArgentina. Frank...n accurate, she added. It's also the first embryo
retrieved from the Southern Hemisphere andthe first to contain fossilized skin from baby dinosaurs. ...
LSU Ag Center Program Focuses On Helping Animals Reproduce; Graduates Assist Humans, As Well
..." Today, both artificial insemination and embryo
transfer are widely usedthroughout the world. New ... Another milestone for the program was with embryo
splitting, whichproduces genetically identical twin animals from a single embryo. In 1982,researcher...
Researchers Announce Breakthrough In Transgenic Animal Technology
...e the egg is fertilized,all cells of the resulting embryo
carry the new gene, and the calf is born withthe capability to secrete a new protein in milk. Subsequent generations,offspring of each founder animal, will also carry the desired gene. Older, less efficient production methods made transgenic livestoc...
Low Birth-Weight Risk Begins Early
...y is that a mother's nausea protects herdeveloping embryo
from natural toxins in food," he says. "And this may be a wayof reminding mothers to protect the unborn from unnatural toxins, likecigarette smoke, too."...
Eggs Fertilised By More Than One Sperm Can Survive
...is cell shrivels and dies, leaving the rest of the embryo
with anormal number of chromosomes. Author: Philip Cohen New Scientist magazine, issue 23rd Jan 99...
Study Finds Protein Clues To Early Embryo Development
...ogenesis. In frog cells, they remain off until the embryo
has gone through12 rounds of division. "And if you don't activate genes during development butyou have a need for a large amount of proteins to be used during development,then you better have those proteins stored. Or you better be ready to translate...
Programmable Cells Open Window Of Opportunity For Gene Therapy
...es in its development from thegeneric cells of the embryo
to the specific cells of each tissue. His findings also provide an insight into the previously unknown mechanismbehind the creation of Dolly, the first animal cloned from adult cells. "Theyknew the cells were reprogrammed, but they had no id...
Molecular Control Mechanism Of Embryonic Development Unraveled
...mals, the process is orchestrated in thedeveloping embryo
by a set of proteins called "Hox proteins" that control thetimely expression of genes -- and thereby control the production of the "nextstage" proteins needed for embryonic development. The action of Hox proteinsmust, in turn, be coordinated to assu...
New Gene May Help Scientists Understand More About How the Body Grows
...hat plays a key rolein the development of the frog embryo
from the neck down, including the neuraltube and t...ière is activated in the head region of the embryo
where it is not normally active. In loss-of-functionexperiments, they asked what happens when derri&...
Powerful Anti-AIDS Agent Found In Tears And In Urine Of Pregnant Women
...on of hCG is to stabilize pregnancy and protectthe embryo
from rejection by the mother's body. However proof of hCG's effects wasn't straightforward. Although crudepreparations of hCG inhibited the growth of Kaposi's sarcoma cells andHIV-infected cells in the laboratory, Dr. Lee-Huang and many other sc...
Statement Of The DFG Concerning "Questions Of Human Embryonic Stem Cells"
...n methods of preparing pluripotent stemcells. The embryo
protection law prohibits any research on and with .... Accordingly, removal of pluripotentcells from an embryo
is prohibited in Germany. The preparation of embryonic stemcells (ES cells) from blastocysts is carr...
Alzheimer's Disease And Developmental Biology Linked Through Single Molecule
... many to do with the patterning of tissues. As the embryo
develops,progenitor cells must differentiate from each other and take up differentduties, a process that involves communication and coordination among theevolving cells. Notch signaling helps determine the cell-fate paths that lead tothe organization...
New Way To Modify Mammalian Genes: Honolulu Transgenesis
... injection ofDNA into the pronucleus of a one-cell embryo
was first described in 1980. Thepronucleus microinjection method is the most commonly used. It works well inmice, but is difficult in mammals such as cows and pigs, in which the pronucleusis difficult to locate within the cell, says Tony Perry, an as...
Scientific team identifies gene critical in embryonic development
...enecould result in midline abnormalities, or early embryo
loss, scientists say....
Brown University research team finds keys to liver development
... identified the primary signals that tell an embryo
where and when a liver should appearand have used those signals to direct immature mouse cells to become livercells and begin liver formation. Understanding how to control both tissue growth and cell identity maylead to new d...
International biotech firm to locate in Southwest Virginia
...ue where a humanprotein is micro-injected into the embryo
of another mammal such as a cow orpig. The protein becomes part of the animal's genetic code. It is expressedin the animal's milk and then extracted and reprocessed into a medicine fortreatment of various human diseases. Currently, proteins and o...
Enzyme-based method to isolate stem cells from umbilical cord blood shows promise
...isn't known, but it mightplay an important role in embryo
development and hence cell differentiation,Colvin says. Exactly how it works awaits further investigation.The researchers used funding from the National Institutes of Health and a PublicHealth Service Grant from the National Cancer Institute to deve...
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