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Tag: "embryos" at biology news

Researchers grow stem cells from human skin

...Most scientists believe that stem cells from human embryos are the most versatile type of stem cell because they have the potential to form any cell or tissue in the body. But they are also exploring the potential of stem cells from adults. In addition to skin, the cells have been identified in bone marrow, ...

A whole lot of shaking goin' on triggers early hatching in red-eyed tree frogs

...he edge of Ocelot Pond, Panama, red-eyed tree frog embryos still in their eggs are about to make a life-or-de...s a few eggs from the clutch. With that bite, the embryos start to wiggle frantically. As the snake moves to take another morsel, the embryos rupture their eg...

Scripps research scientists identify infertility molecule

...outside their bodies, and finally having the early embryos implanted directly into their wombs (the technique...and one that directly affects the ability of mouse embryos to implant in their mother's womb. LPA Receptors and Implantation The pathway that affects implant...

Scientists succeed in cloning human embryos from eggs matured in the lab

...ists in Belgium have discovered how to clone human embryos from eggs that have been matured in the laboratory...ts to create embryonic stem cell lines from cloned embryos and develop them to provide eggs and sperm for infertile couples, the 21st annual conference of the ...

Invitrogen Launches i-Path -- A Unique Systems Biology Platform at BIO 2005

...ists in Belgium have discovered how to clone human embryos from eggs that have been matured in the laboratory...ts to create embryonic stem cell lines from cloned embryos and develop them to provide eggs and sperm for infertile couples, the 21st annual conference of the ...

Decisions, decisions: Male or female?

... Hopkins biologists have determined how developing embryos tell their specialized "germ cells" whether to dev...m cells must take "advice" from other cells within embryos as to which is the appropriate sex. The Johns Hopkins researchers have found that this advice is del...

Human embryonic stem cells have the potential to develop into eggs and sperm in the laboratory

...). "We derived six embryonic stem cell lines from embryos donated for research under HFEA regulations by couples undergoing IVF treatment. In addition, we utilised cell lines from the University of Wisconsin. "The human embryonic stem cells were allowed to develop into collections of cells called embryoid ...

Micro-molecule plays big role in birth defects

...croRNAs in every single cell, Harfe said the mouse embryos would survive little more than seven days after fertilization. "That isn't enough time to study development," Harfe said. "Most structures, such as the heart, the gut and the lungs, haven't even formed yet. Now we can bypass the problem of early mor...

Temperature regulates circadian clock in zebrafish

...ited to this task because adults, larvae, and even embryos can tolerate a wide range of core body temperatures (being cold-blooded animals) that can be manipulated simply by changing the water temperature. Temperature variations of as little as 2 oC (35.6 oF) can reset the zebrafish clock, Lahiri et al. show...

Researchers make 'embryonic-like' stem cells from umbilical cord blood

...and multiple sclerosis. "Acquiring stem cells from embryos also has major limitations because it is difficult to obtain enough cells to transplant as well as getting the right tissue type for the patient," Dr McGuckin said. "Using cord blood gets over that obstacle because we can produce more stem cells and,...

Insight into the processes of 'positive' and 'negative' learners

...and multiple sclerosis. "Acquiring stem cells from embryos also has major limitations because it is difficult to obtain enough cells to transplant as well as getting the right tissue type for the patient," Dr McGuckin said. "Using cord blood gets over that obstacle because we can produce more stem cells and,...

Researchers propose measures to curb lion attacks in Tanzania

...and multiple sclerosis. "Acquiring stem cells from embryos also has major limitations because it is difficult to obtain enough cells to transplant as well as getting the right tissue type for the patient," Dr McGuckin said. "Using cord blood gets over that obstacle because we can produce more stem cells and,...

UCR biochemist goes to Washington with high-protein corn

...h as grain. The new corn we have developed has two embryos in its kernel, which is what doubles the content of protein and oil and reduces the starch content. It could provide a good source of protein for those that depend on grain as their primary source of nutrients." Every corn kernel results from a flow...

Simple explanation for complex pattern of feather development

... 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, in any p...

NYU biologists map out early stages of embryo formation

...letely sequenced and a model organism to study how embryos develop. With the complete genome sequence of C. ...f these supported the predictions. Describing how embryos function at the molecular level may help understand how human embryos develop, and may also provide ...

miRNAs and musculature

...er, the authors find that muscles form normally in embryos in which expression of Dmir-1 has been ablated by gene targeting (Dmir-1 KO). A defect is only revealed when larval growth is initiated by feeding, which triggers paralysis and eventually death of Dmir-1 KO larvae. Analysis of the mutant larvae a...

Lactose intolerance linked to ancestral environment

...arly in pregnancy also may protect women and their embryos from food-borne pathogens and other toxins." A Darwinian medicinal view complements traditional medicine, Sherman said, because if researchers can better understand why a symptom occurs, such as a fever, runny nose or allergy, they can better evalua...

Fish and chips: A fast track to understanding blood development

... humans, they "turned off" these genes in the fish embryos and watched to see if the blood formed normally. They found that disrupting the expression of 14 of these genes resulted in defects in how blood cells developed in zebrafish. The next step is finding out how these 14 genes are involved in the develo...

Most embryos produced during IVF do not result in live births

...e School of Medicine have found that 85 percent of embryos transferred during in vitro fertilization fail to ...mething in nature has decided that these implanted embryos are not viable," said Patrizio, who conducted the study with co-author George Kovalevsky, M.D. "We ...

Tissue regeneration operates differently than expected

...n these investigations, so-called "chimeric" mouse embryos were produced from mesenchymal stem cells and several mouse mutants: Obviously, the stem cells are recruiting the IL-4/NFAT signalling pathway which also is involved in the activation of T-lymphocytes during immune response. From the findings presen...

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