Sentences with phrase «embryonic development with»

Not exact matches

The first page of Larsen's Human Embryology states that, `... [W] e begin our description of the developing human with the formation and differentiation of the male and female sex cells or gametes [sperm and egg], which will unite at fertilisation to initiate the embryonic development of a new individual».

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.

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.

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.

The latest findings show that genetic defects in the body's ability to manufacture carnitine might be associated with an increased risk of autism because carnitine deficiency interferes with the normal processes by which neural stem cells promote and organize embryonic and fetal brain development.

«Thus, we hypothesize that Gdf3 combines with Ndr1 and Ndr2 to facilitate Nodal signaling during zebrafish development, acting as an essential factor in embryonic patterning,» said Pelliccia, a graduate student in molecular biology.

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.

Find the chemical switch, flip it the other way in embryonic development, and the result would be a bird with a tail.

Others have tracked the first few hours of the embryonic development of sea urchins and other organisms with the goal of seeing how various transcription factors alter gene expression over time.

Belyaev suggested that sometime during embryonic development the production of dopa was delayed, creating docile foxes with patches of white fur and skin.

In 2014, UCSF's Nathan Young and Ralph Marcucio, working with Schneider, carried out extensive skull measurements on a variety of embryonic vertebrates and determined the point during development at which the bird face begins to diverge from those of other vertebrates.

If these mutations happen during embryonic development, there could be several neurological problems: the child could become autistic, kids could be born with seizure disorder, or the developing neurons might not migrate to their proper site in the brain.

«The new experimental techniques we used, combined with collaborative efforts of biologists and computer scientists, are allowing us to gain new insight into the exquisite accuracy of embryonic development.»

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.

And this molecular switch controls how cells behave and interact with their neighbors during embryonic development.

«We do not yet know whether a protein with a similar function also plays a role in human embryonic development, but we suspect so,» says Buchner.

If the egg were indelibly etched with asymmetric information that unequivocably determines development, the argument went, how could two embryonic cells be separated and still produce whole, intact, normal individuals?

They tried hundreds of different recipes; eventually they discovered that if they mixed liver precursor cells (derived from iPS cells) with two other types of standard human cell lines known to be important for embryonic liver development, then the cells would spontaneously form a 4 to 5 - millimeter 3D structure called a liver bud.

This molecule pours out of embryonic cranial cells after infection with Zika virus, and could harm brain development.

These are essential for supporting embryonic and fetal development, and many pregnancies fail because of problems with these tissues.

Veronica Palma, from University of Chile, led the study with Rehen and highlights the combined approaches allowed the creation of an environment that mimics the one during embryonic brain development.

The gene's apparently crucial role in embryonic development «is remarkable,» says William Kimberling, a geneticist at Creighton Medical School in Omaha, Nebraska, who studies children with BOR.

In addition, researchers found that the gene families related to whale's body hair and sensory receptors were contracted, such as Keratin - related gene families associated with hair formation, several Hox genes that play an important role in the body plan and embryonic development.

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.

Now, with more ways to monitor gene activity during development — and fully sequenced genomes of various snakes and other reptiles for comparison — Cohn and graduate student Francisca Leal have tracked the genetic activity in embryonic pythons to see why their legs start, but never finish, developing.

Because bat experts think that the ancestor of all bats was a small mammal with short forelimbs like that of the mouse, the researchers next compared bat and mouse embryonic development.

The researchers hope that these assays will be used by many laboratories that are studying the events associated with early embryonic development and the effect of repeat length and methylation status on gene expression and differentiation.

Embryonic development in mammals begins with the division of the fertilized egg, which is then followed by several further rounds of division to form the blastocyst, a sphere of cells made up of two layers of cells surrounding a fluid - filled cavity.

However, malformation of skeletal bones during embryogenesis also occurs in FOP patients and illustrates that the underlying genetic mutation occurs in a gene with functional importance in regulating chondro - osseous differentiation during embryonic skeletal development as well as in adult musculoskeletal tissues.

Although we agree that greater investments are needed in the clinical development of these therapies, we disagree with the authors» suggestion that, relative to embryonic stem cells, adult stem cells provide a superior vehicle for cell - based therapies because they lack tumorigenic activity, can be prepared by methods approved by the Food and Drug Administration (FDA), and have been free of ethical controversy.

CARS microscopy also confirmed the gradual increase of the size of lipid containing structures during oogenesis (Figs. 5A and 5B), the sudden re-localization of these structures to the periphery of the dividing nucleus in the first embryonic division (Fig. 5E), and the propagation of this phenotype, although with gradually diminishing appearance, throughout embryonic development (Figs. 5F and 5H).

In the new research, Pollen and co-first author Tomasz Nowakowski, PhD, also a postdoctoral researcher in the Kriegstein lab, partnered with Fluidigm Corp. to develop a microfluidic approach to map out the transcriptional profile — the set of genes that are actively producing RNA — of cells collected from the VZ and SVZ during embryonic development.

The grand architecture of the human cortex, with its hundreds of distinct cell types, begins as a uniform layer of neural stem cells and builds itself from the inside out during several months of embryonic development.

Correspondingly, endothelial - specific deletion of Tie2 using Ve - cad - Cre driver mice, pursued in validating the Tie2fl / fl mice used in this study, essentially phenocopied the global Tie2 KO phenotype with embryonic lethality around E10.5 (Supplementary Fig. 13), confirming the key role of endothelial Tie2 during embryonic development.

It should be said that stem cell lines are quite different from normal embryonic development and these results should be interpreted with caution.

Because NF - kB is also involved in embryonic development, Verma and his team got together with Juan Carlos Belmonte «s laboratory at Salk and turned to zebra fish to determine what would happen if IKK1 was deleted.

Eight HARs showed differences in their enhancer activity when the human mutations were present.4 These differences modify how genes were expressed in the developing limb (HAR2, 2xHAR114), eye (HAR25), and central nervous system (2xHAR142, 2xHAR238, 2xHAR164, 2xHAR170, ANC516 / HARE5).4, 10 Because relatively few time points have been examined, it is likely that an even higher percentage of the tested HARs are active enhancers at some point during embryonic development or in adult tissues, possibly with human - chimp differences.

In view of the different timing of meiotic initiation in female and male mammals, we determined the developmental expression profile of mouse Boule during both male and female embryonic gonadal development (embryonic day 10.5, E12.5, E16.5 and E17.5) in comparison with adult gonads.

The challenge takes on even more urgency with recent developments, including a federal administration now more open to exploring the potential of stem cells, the recent FDA approval of a human trial involving embryonic stem cells, as well as the reported case of a young boy who developed a brain tumor four years after receiving a stem - cell treatment for a rare genetic disorder.

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.

These findings on gene expression in single embryonic stem cells are in concert with recent studies of early mammalian development, which reveal molecular heterogeneity and a stochasticity of gene expression in blastomeres.

We show that DONSON is expressed in progenitor cells of embryonic human brain and other proliferating tissues, is co-expressed with components of the DNA replication machinery, and that Donson is essential for early embryonic development in mice as well, suggesting an essential conserved role for DONSON in the cell cycle.

For example, clusters containing genes that are upregulated during the course of ES cell differentiation (Table 3) include in order of time of expression: cluster 30 that represents genes which take part in the formation of the three embryonic germ layers during gastrulation, i.e., Goosecoid, Cerberus like 1 homolog, Wnt3, Mesp1, Mixl1, mEomes and Even - skipped 1; cluster 15 containing molecular regulators of early mesoderm development including Bmp2, Bmp5, Msx1, Msx2, Cripto, Tbx20, Hey2, Smad6, Vegfr2 (Kdr), Foxf1 and Hand1; cluster 20, which comprises regulatory and structural genes linked to hemopoiesis such as Gata1, Nfe2, Klf1, Tie1, hemoglobins (Hba - x, Hbb - b1) and Glycophorin A; cluster 12, which is rich in genes involved in cardiac development, e.g., Mef2c, Myl4, cardiac Troponin T2, Tropomodulin 1, myosin binding protein C, Bves, Angiopoietin 1 and Angiopoietin 2; and, cluster 4, which consists mostly of genes associated with neuronal development and differentiation, for example, Neurog1, Neurog2, Olig2, Nkx6.1, Neurod4, Pou3f2, Pou3f4, Cacna2d3, Cacng4, Kcnq2 and EphA5.

We propose that ZNF462 plays an important role in embryonic development, and is associated with craniofacial and neurodevelopmental abnormalities.

This current is a natural adjunct of embryonic development, present in all wild - type hair cells but declining after birth with emergence of the normal - polarity current.

Over the last year, I've experienced three consecutive miscarriages, each subsequent one with slightly more embryonic / fetal development.

In the process new visual languages, commodities and life forms are being generated reflecting back to us our often violent entanglement with the world: patterns of embryonic development in mutated lab - test worms, live - streamed flows of CO2 gas across the planet, or a group of near - extinct animals passing by a tree and noticing the tracking camera.