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Tag: "embryos" at biology news

Zebrafish may hold key to improved cancer research

...owever, are a fascinating species because the fish embryos are literally transparent and can be directly observed at early developmental stages better than almost any other animal species. They had been used for years in studying everything from the immune system to cardiovascular disease and skeletal develo...

Researchers offer proof-of-concept for Altered Nuclear Transfer

... that researchers first create genetically altered embryos that are unable to implant in a uterus, and then extract stem cells from these embryos. Because the embryos cannot implant, they are by definition not "potential" human lives. Some suggest that this would que...

Center releases new public survey on stem cells

...-for benefits. Stem cells derived from very early embryos show the most promise in research to date, but the...bryos, but the scientific consensus so far is that embryos remain the best research choice. Typically, the embryos used are those remaining at the conclusion ...

New possibilities for flu antiviral and vaccine research emerge from 'Spanish flu' virus

...n they studied the viruses' effects in mice, chick embryos and human lung cells and identified the constellation of genes that was responsible for the Spanish flu virus' extreme virulence. One gene associated with high virulence was the HA gene, which encodes the hemagglutinin surface protein that helps th...

Genetic testing still smart choice, despite uncertainties

Screening embryos for genetic diseases during in vitro fertilization...thod many practitioners use to pick the healthiest embryos during IVF, UF researchers set out to study the procedure. Their work, described during a recent mee...

Sperm stem cells closer to being like embryonic stem cells

...he only source of such cells for research is human embryos or mouse cells. Recently another research team published results showing that mouse male germ stem cells could be made to exhibit pluripotent characteristics, but those findings have yet to be repeated. Ordinarily, when germ stem cells divide into ...

Changes to embryos can elicit change in adult fish

...the team injected bmp4 protein into the developing embryos of another fish species, the zebrafish, they saw that the mechanical advantage (and thus the biting power) of the jaw increased. "This experiment fuses the traditional disciplines of developmental genetics and evolutionary biology," said Streelman....

Telling axons where to go - and grow

...r neurons and dorsal root ganglia neurons in mouse embryos at a time in which projections are actively developing, suggesting a role of this protein in the development of these neurons. They are able to show that this is indeed the case by RNAi-mediated knock-down of Rnf6 in primary hippocampal neurons, whi...

OHSU discovery sheds light into how stem cells become brain cells

...ervous system. This resulted in the development of embryos with smaller brains containing neurons but virtually no glial cells. When they isolated neural stem cells, placed them into cell culture and then removed Brg1, the cells in the culture turned into neurons but failed to differentiate into glia. "Thi...

The secret love life of plants

...d double-fertilisation mechanism that arises among embryos and endosperm. They develop together into mature seeds. The exact process, and the communication between the two parts of the seeds, has been unclear to scientists. Researchers at the Max Planck Institute for Plant Breeding Research and the Univers...

MicroRNA may have fail-safe role in limb development

...." Researchers looked at gene activity in chicken embryos and in mice, finding miR-196 silences a chemical important for transferring information from DNA to RNA within a cell - a transcription factor. "It's turning off a transcription factor in the hindlimb that is important for forelimb development," Har...

UCSD study finds anthrax toxins also harmful to fruit flies

...o-authors applied lethal factor toxin to fruit fly embryos and larvae and observed that a component of the ex...esulting in a hole or cleft in thoracic regions of embryos and adults. This developmental process disrupted by LF treatment is similar mechanistically to wound...

Embryos tell story of Earth's earliest animals

...rst animals will have to be gleaned from spherical embryos fossilized under very specific conditions, accordi...gree about whether the fossils are actually animal embryos or even if they are animals. "The fossils look great. The problem is, if you know anything about e...

Breakthrough for stem cell research

...cell lines are derived from specialized cells from embryos donated by infertile couples that specifically consented for their excess embryos to be used in stem cell research. These lines could eventually lead to safer treatments for condit...

Technique makes it easier to see mouse embryo in all its glory

... Institute. Dr. Keller routinely works with mouse embryos in trying to understand the role of developmentall...metimes acquire. The study of genetically modified embryos and their birth defects is usually a slow and laborious process, but Dr. Keller and colleagues have ...

UCLA scientists find male gene in brain area targeted by Parkinson's

... discovered that a sex gene responsible for making embryos male and forming the testes is also produced by th...d SRY as the gene that determines gender and makes embryos male. Located on the male sex chromosome, SRY manufactures a protein that is secreted by cells in th...

Cloned stem cells prove identical to fertilized stem cells

... cells derived from a cloned embryo. But if cloned embryos can't produce normal organisms, how can they produce normal stem cells? Analyzing the complete gene-expression profiles of both cloned and fertilization-derived stem cells in mice, scientists at Whitehead Institute for Biomedical Research now have c...

Absence of critical protein linked to infertility

...is no decidualization. We transferred viable mouse embryos from healthy mice into mice lacking the gene, and ...us is ready to accept an embryo, so often multiple embryos are transferred in hopes that one will attach. In future studies, confirmation of C/EBPb as a marker...

Forsyth scientists gain greater understanding of how embryos differentiate left from right

...ing systems appeared to be operating in frog/chick embryos vs. human/mouse/zebrafish embryos. "In our previous research we showed that this developmental event happens earlier than expected in frogs by identifying an ion transporter that generates natural bioelectrical signals that ultimately control gene e...

Extinctions linked to climate change

...tain lakes, higher levels of exposure of amphibian embryos to UV-B radiation in sunlight, and egg mortality in the western toad that approached 100 percent in some years, due to an opportunistic disease. In the current Nature article, researchers pointed to more examples. "The climate change in the Arctic ...

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