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.
The architecture of the DNA-protein complexes that make up the genome in each cell nucleus regulates the course of early embryonic development.
Genetic variation in heart valve cells of the developing fetus create the blueprint for the later development of mitral valve prolapse, according to the cover story of today's Science Translational Medicine.
Not all cells are destined for greatness. Deemed unfit to serve in the body, some are killed off during early development through a process called cell competition. This phenomenon has previously been documented in flies and is now turning out to occur in mammals as well.
Medications have to be safe for mothers-to-be and for their unborn children. Before the authorities will approve a new drug, it must be tested in animal trials on pregnant rodents and, as a rule, pregnant rabbits.
How do bones heal, and how could they heal better? The answer to these questions may lie in a newly discovered population of "messenger" cells, according to a recent USC Stem Cell study published in the journal eLife.
All the surface of the human body is represented in the cerebral cortex in a transversal band localized at the external part of the cerebral hemispheres: the somatosensory cortex.
Induced pluripotent stem cells can turn into any type of cell in the body or remain in their original form. In the current edition of Molecular Cell, scientists from the Helmholtz Zentrum München describe how cells “decide” which of these two directions to take.
Synthetic biologists have added high-precision analog-to-digital signal processing to the genetic circuitry of living cells.
The human genome is fascinating. Once predicted to contain about a hundred thousand protein-coding genes, it now seems that the number is closer to twenty thousand, and maybe less.
More than a decade ago, radiation oncologists noticed a nifty phenomenon: Sometimes radiation used locally against a tumor could excite the immune system to attack cancer systemically throughout the body.
Ramón Muñoz-Chápuli and Rita Carmona, researchers of the UMA Department of Animal Biology, have identified a new molecular mechanism involved in pancreas repair.
Fruit flies make for stingy mothers, imparting only a portion of the genetic building blocks their offspring need to survive. The rest must be produced by the fertilized egg in its first few steps of growth.
Nicotine induces widespread adverse effects on human embryonic development at the level of individual cells, researchers report February 28th in the journal Stem Cell Reports.
How cells in developing embryos communicate depends a great deal on context, according to scientists at Rice University.
In a paper published in the journal Nature, an international research team led by researchers at Karolinska Institutet in Sweden report that bone growth in mice takes place in accordance with the same principles as when new cells are constantly produced in blood, skin and other tissue.
The story that's often told about crocodiles is that they're among the most perfectly adapted creatures on the planet - living fossils that have remained virtually unchanged for millions of years.
A team of researchers under the direction of the Medical Center - University of Freiburg has created an entirely new map of the brain's own immune system in humans and mice.
New information is unfolding on the genetic controls of an early turning point in pregnancy. As the tiny, dividing cell mass, the blastocyst, travels from the oviduct and lodges in the wall of the uterus, the cells must exit their pre-implantation state and be ready for post-implantation development.
The first moments of life unfold with incredible precision. Now, using mathematical tools and the help of fruit flies, researchers at Princeton have uncovered new findings about the mechanisms behind this precision.
Acinic cell carcinoma is the third most common malignant form of salivary gland cancer. These tumors are similar to normal salivary gland tissue and occur most frequently in the parotid gland.