Embryonic Development News and Research

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Embryonic development or embryogenesis is the process by which the embryo is formed and develops. It starts with the fertilization of the ovum, egg, which, after fertilization, is then called a zygote. The zygote undergoes rapid mitotic divisions, the formation of two exact genetic replicates of the original cell, with no significant growth (a process known as cleavage) and cellular differentiation, leading to development of an embryo.

Discovery of gene and mechanism essential to the embryonic development of the epididymis

Human sperm cells travel up to 6 meters in their transit from testes to penis, and most of that journey occurs in the epididymis, a tightly coiled tube that primes the cells for their ultimate task: fertilization.

28 Jun 2007

New model for signal transduction in cells

Among the key communication systems within a cell is the Wnt signaling pathway, which regulates embryonic development and whose deregulation can also contribute to cancer development.

28 Jun 2007

A new system for collaboration in cell communication

Investigators from the Institute of Research in Biomedicine (IRB Barcelona) have identified a new signalling mechanism among cells in the fruit fly, Drosophila melanogaster.

27 Jun 2007

New way to increase stem cells in blood

Researchers at Children's Hospital Boston report finding a new way to increase stem cells in blood, suggesting a possible treatment to help patients who undergo chemotherapy or bone marrow transplant for leukemia and other cancers recover their immune function more quickly.

23 Jun 2007

Otosclerosis gene identified

A gene responsible for the single most common cause of hearing loss among white adults, otosclerosis, has been identified for the first time, a scientist told the annual conference of the European Society of Human Genetics in Nice, France.

19 Jun 2007

Embryonic stem cells can be created without eggs

Embryonic stem cells are unique because they can develop into virtually any kind of tissue type, an attribute called pluripotency.

8 Jun 2007

Deleting gene important in embryo development leads to premature aging in mice

Researchers at the Abramson Family Cancer Research Institute of the University of Pennsylvania have found that deleting a gene important in embryo development leads to premature aging and loss of stem cell reservoirs in adult mice.

8 Jun 2007

New protocols to understand embryos, clones, stem cells

Cloning, X-chromosome inactivation, stem cells, and embryogenesis are hot areas of research at the moment, and protocols featured in this month's release of Cold Spring Harbor Protocols will aid these studies.

3 Jun 2007

Female reproductive function is influenced by childhood environment

This suggests there is a critical window of time from about 0-8 years of age that determines the rate at which girls physically mature and how high their reproductive hormone levels reach as adults.

15 May 2007

Scientists work out mechanism underlying asymmetric cell division in nematode worms

When a cell divides, normally the result is two identical daughter cells. In some cases however, cell division leads to two cells with different properties. This is called asymmetric cell division and plays an important role in embryonic development and the self-renewal of stem cells.

4 May 2007

Important step towards a spatially and temporally quantifiable model of the cell

Cell membranes are like two-dimensional fluids whose molecules are distributed evenly through lateral diffusion.

26 Apr 2007

Study of planarians offers insight into germ cell development

The planarian is not as well known as other, more widely used subjects of scientific study , model creatures such as the fruit fly, nematode or mouse.

25 Apr 2007

Researchers identify key function of a molecule - wound healing in the skin

The skin is the largest organ of the human body. It protects against environmental influences and pathogens, regulates body temperature, and protects the body against dehydration.

24 Apr 2007

Novel two-step mechanism ensures that all cilia beat in unison

Cilia, tiny hair-like structures that propel mucus out of airways, have to agree on the direction of the fluid flow to get things moving. Researchers at the Salk Institute for Biological Studies discovered a novel two-step mechanism that ensures that all cilia beat in unison.

24 Apr 2007

New methods for creating and detecting specific proteins

In their native form, the thousands of assorted proteins in our body are virtually indistinguishable.

5 Apr 2007

MIT MEMS device provides precise way to physically arrange cells

Now MIT researchers led by Sangeeta Bhatia, associate professor of electrical engineering and computer science at the Harvard-MIT Division of Health Sciences and Technology (HST) and Brigham and Women's Hospital, have solved the problem with a novel device.

2 Apr 2007

Cannibalistic signals help mammalian embryos develop normally

A cannibalistic process called autophagy spurs dying embryonic stem cells to send "eat me" and "come get me" signals to have their corpses purged, a last gasp that paves the way for normal mammalian development, UT Southwestern Medical Center researchers have found.

8 Mar 2007

Scientists alter electrical properties of cells inducing regeneration

Scientists at Forsyth may have moved one step closer to regenerating human spinal cord tissue by artificially inducing a frog tadpole to re-grow its tail at a stage in its development when it is normally impossible. Using a variety of methods including a kind of gene therapy, the scientists altered the electrical properties of cells thus inducing regeneration.

28 Feb 2007

How stem cells are regulated

Researchers from Biotech Research & Innovation Centre (BRIC) at University of Copenhagen have identified a new group of proteins that regulate the function of stem cells. The results are published in the new issue of Cell.

22 Feb 2007