Sentences with phrase «stages of embryonic development»

They are present during the early stages of embryonic development and possess the ability to become, or «differentiate,» into almost any tissue within the body.

(H) The lipid containing structures progressively diminish in size in mutant embryos during later stages of embryonic development (arrowhead).

The ability of a fertilized egg to generate both embryonic and extra-embryonic tissues is referred to as «totipotency,» an ultimate stem cell state seen only during the earliest stages of embryonic development.

The fossils preserve stages of embryonic development frozen in time by miraculous processes of fossilisation, which turned their squishy cells into stone.

In unpublished work presented at the meeting, Barna and colleagues also found that certain ribosome varieties may be important at different stages of embryonic development.

Their Kupffer's vesicles were abnormally symmetric in shape, and southpaw expression was greatly reduced, suggesting that gdf3 is also required for optimal Nodal signaling during later stages of embryonic development.

To investigate whether maternally supplied gdf3 mRNA also plays a role in left - right patterning, the researchers used a series of experimental tricks to supply embryos with enough Gdf3 protein to form the mesoderm and endoderm and survive until the later stages of embryonic development.

«This burst of genetic changes happens only during the early stages of embryonic development and then it stops,» Liu said.

I have decided to break this topic down into 3 parts: How to Incubate Chicken Eggs with Kids, Stages of Embryonic Development and Activities to do while Incubating, and finally The Hatch and Going Home.

Because the possibility of «twinning» exists for that long in the first stages of embryonic development, one could argue that no individual human being can yet be present - and that, hence, experimentation should be permitted.

This complex society may be said to begin with conception, or with a late stage of embryonic development, or with early childhood, depending upon the purpose which determines what one takes as its defining characteristic.

This happens particularly often during the stage of embryonic development, but it can also occur in tumors when they form metastases.

Nephron progenitor cells (NPCs), at least in humans, normally only exist during a brief stage of embryonic development.

The gene, known as gata5, acts in embryonic cells, which are primordial, unspecialized cells that form in the earliest stage of embryonic development and are genetically programmed to evolve into one of many specialized cell types, such as skeletal muscle cells, nerve cells, blood cells, skin cells, and liver cells.

For those species, the human cells could be added at a later stage of embryonic development and would require an extra layer of scrutiny by a special NIH committee.

Not exact matches

But the great and encouraging consequence of this breakthrough is that the humanity of the unborn child, even at the earliest embryonic stage of development, is now a subject of polite conversation even in the circles that so fanatically resisted acknowledging the facts of life.

Nanog appears in both the morula (12 - cell stage) and in high concentration at an advanced stage of normal embryonic development, the blastocyst (150 - cell stage).

The idea of development seems to have come from biology, where it is used in reference to the process of evolution from a previous and lower (e.g., embryonic) stage to a later, more complex or more perfect one; this development can involve differentiation into individual organisms and their subsequent histories.

Perhaps the most astonishing stage of pregnancy is that of the embryonic development as your unborn child goes from being the size of a sesame seed and looking like a tadpole to being the size of a kidney bean with some neck definition and tiny webbed fingers and toes.

In the initial stages of the research project, Yaniv's team members Julian Nicenboim and Dr. Guy Malkinson obtained images of developing zebrafish embryos, whose transparent bodies make it possible to document embryonic development in real time over several days.

They also found that embryonic growth appears to be more sensitive to temperature at earlier stages of development and to moisture at later stages.

Changes in cellular metabolites have been shown to regulate embryonic stem cell development at the earliest stages of life.

«Changes in metabolites can regulate earliest stages of development: Findings may offer insights into a variety of disorders, advance embryonic stem cell research.»

Neurocutaneous disorders are caused by abnormal development of cells in the embryonic stage, leading to tumors in various parts of the body, including the skin, organs, bones, brain and spinal cord.

Because development often reprises stages of evolution, the growth of embryonic ears in tandem with the jaw is no accident: the sound - transmitting middle ear bones that are a distinguishing feature of mammals evolved from what used to be gill arches in fish and jawbones in reptiles.

This discovery by the scientists at the CRG provides an insight into stem cell - forming molecular mechanisms, and is therefore of great interest for studies on the early stages of life, during embryonic development.

Salk scientists and colleagues have proposed new molecular criteria for judging just how close any line of laboratory - generated stem cells comes to mimicking embryonic cells seen in the very earliest stages of human development, known as naïve stem cells.

Su - chun Zhang and his colleagues at the University of Wisconsin, Madison, and the University of Bonn, Germany, directed the development of embryonic stem cells stage by stage, using the same growth factors the body uses.

The next step, he says, is to investigate how embryonic mouse brains with induced folds develop as they mature past the fetal stages of development and to look across species to see if the gene has similar effects in other mammals.

The researchers used this live - imaging technique to study fly embryos at a key stage in their development, approximately two hours after the onset of embryonic life where the genes undergo fast and furious transcription for about one hour.

A second method involves introducing the transgenic DNA into embryonic stem cells (ES cells) derived from a mouse embryo at the very early stages of development.

This pattern of expression and cellular distribution was observed beginning at the three-fold embryonic stage and continued throughout development to adulthood (Fig. 2).

Human embryologists» best - kept secret could arguably be the Carnegie Stages of Human Embryonic Development.

Professor Martinez - Arias and colleagues, supported by the European Research Council and the Wellcome Trust, have reconstructed these early stages of development using mouse embryonic stem cells.

If ACT will succeed at this stage and will able to show long - term safety, it will shape and determine the future development and commercialization of embryonic stem cell - based products.

Researchers at the University of Cambridge have managed to reconstruct the early stage of mammalian development using embryonic stem cells, showing that a critical mass of cells — not too few, but not too many — is needed for the cells to being self - organising into the correct structure for an embryo to form.

They discovered that extra chromosome 21 - a genetic state known as trisomy 21 - disturbs a key regulating gene called NRSF or REST, which in turn disturbs the cascade of other genes that control normal development at the embryonic stem cell stage.

Although additional research is required to propel the embryo into the next stage - that of a live fetus - this study offers a more comprehensive understanding of early embryonic development and could help improve fertility treatments.

In the future, these cells could be molecularly manipulated to better grasp their interactions and the early embryonic development stages, hypothesizes Dr. Christos Coutifaris, president - elect of the American Society for Reproductive Medicine and a professor at the University of Pennsylvania.

Mouse brain tissue from three different stages of the mouse brain development; embryonic day 15, postnatal day 2 and postnatal day 21, was studied.

«Here, we've mapped the series of steps that precede Dll4 activation and that set the stage for the formation of arteries — shedding light into a so - called «black box» of embryonic development.»

These images show human embryonic stem cell colonies, as grown in 1998 by researchers at the University of Wisconsin — Madison, in different stages of development.

It is based on the definitive books of mouse embryonic development by Theiler (1989) and Kaufman (1992) yet extends these studies by creating a series of three dimensional computer models of mouse embryos at successive stages of development with defined anatomical domains linked by a stage - by - stage ontology of anatomical names.

The sequential appearance of genes specific to early developmental stages matches the timing of their induction during embryonic development.

This intra-species comparison between development and regeneration will provide novel insights into the plastic nature of the morphogenetic trajectories that lead to organ formation in both embryonic and adult stages.

Taking into account that ES cells are isolated at embryonic day 3.5 post fertilization, the sequential appearance of genes specific for gastrulation, mesoderm formation, hemopoiesis, cardiopoiesis and neurogenesis during ES cell differentiation follows the timing of comparable developmental stages in embryonic development.

In fact, this system resembles the initial stages of morphogenesis — the biological process that governs the emergence of the body plan in embryonic development.

These genes have been also implicated in the gastrulation phase of embryogenesis [55] indicating that «Time Series» clusters provide a comprehensive collection of genes expressed at specific stages of ES cell differentiation and early embryonic development.

A living plant continues to have embryonic tissues even in advanced stages of development.

There is no prohibition against third party funding of disputes in the United Arab Emirates (UAE) or the wider Middle East although its development is still in its embryonic stage.