Pasco Rakic has deciphered how neurons
in the embryonic brain arrange themselves during development into the highly ordered, densely interconnected, and immensely complex circuitry of the adult cerebral cortex.
Our analysis also revealed that a surprising proportion of rare devastating mutations transmitted by parents occurs in genes expressed
in the embryonic brain.»
The research produced another important finding: «We were able to explain the role of iodine
in embryonic brain development at the cellular level,» says Denise Stenzel.
Last year, the same researchers showed that the trigger came from cells in a structure
in the embryonic brain called the floor plate, which dopamine cells brush past while migrating to their eventual home in a part of the brain called the substantia nigra.
They showed that ZIKV infection of cortical progenitors (stem cells for cortical neurons) controlling neurogenesis triggers a stress in the endoplasmic reticulum (where some of the cellular proteins and lipids are synthetized)
in the embryonic brain, inducing signals in response to incorrect protein con - formation (referred to as «unfolded protein response»).
Not exact matches
«BPA and BPS (substitute for BPA) affect
embryonic brain development
in zebrafish: Low levels of chemicals linked to hyperactivity.»
The researchers detected this SMN long noncoding RNA, or lnc - RNA (pronounced «link RNA») for short,
in human
embryonic kidney cells,
brain cell samples and neurons derived from the stem cells of healthy people and those with spinal muscular atrophy type I and II.
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.
Using a mathematical model known as the Ising model, invented to describe phase transitions
in statistical physics, such as how a substance changes from liquid to gas, the Johns Hopkins researchers calculated the probability distribution of methylation along the genome
in several different human cell types, including normal and cancerous colon, lung and liver cells, as well as
brain, skin, blood and
embryonic stem cells.
Brain and ganglia of
embryonic Periplaneta americana were grown for 2 to 3 weeks
in a chemically defined medium.
Without melanin during the
embryonic stage, the neuronal tracts leading from the eye to the visual cortex of the
brain develop aberrantly, resulting
in diminished depth perception.
For years, Scripps neuroscientist Jerold Chun had been studying the
embryonic brain and how certain lipids
in the blood of both the mother and the embryo affect its development.
The team used human
embryonic stem cells — which can transform into any cell of the body — and cultured them
in a mixture of chemicals to grow human
brain cells.
Using a nuclear protein expressed
in follicle stem cells (FSCs), the researchers found that castor, which plays an important role
in specifying which types of
brain cells are produced during
embryonic development, also helps maintain FSCs throughout the life of the animal.
On the other hand, the problem is, you know, with
embryonic stem cells, they haven't been able to get stem cell lines from livestock animals that can proliferate
in that way, without just sort of veering up
in their own direction and turning into, instead of muscle, turning into
brain tissue or bone tissue or something else.
These include a family of signaling molecules called protocaderins, which regulate neuronal development and short - range interactions between neurons, and a family of transcription factors called zinc fingers, which are mainly expressed
in embryonic and nervous tissues and are thought to play roles
in brain development.
Partially paralyzed rodents walk almost normally after human
embryonic or fetal
brain stem cells repaired their spinal cord injuries
in recent studies.
Just a day after fertilization,
embryonic brains begin sending signals to far - off places
in the body, helping oversee the layout of complex patterns of muscles and nerve fibers.
The researchers placed an
embryonic rat
brain cell
in each well; as the cells grew, they sent out long dendrite arms through the tunnels toward neighboring wells.
Last May
in Nature Neuroscience, his lab and a team at Columbia University reported that
embryonic stem cells could be used to shed light on the origins of amyotrophic lateral sclerosis (ALS), the progressive neurodegenerative disease
in which motor neurons
in the
brain die.
Around the same time, Yoshiki Sasai of the RIKEN Center for Developmental Biology
in Kobe, Japan, cultured the first
brain organoids, starting not with adult stem cells but with
embryonic stem cells.
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.
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.
Yong - Chun Yu at Fudan University
in Shanghai, China, and his team wondered if fearful adult mice could be helped by a transplant of
embryonic brain cells.
McKay announced that he had mitigated the symptoms of Parkinson's
in rats by using mouse
embryonic stem cells that he had turned into dopamine - producing
brain cells.
Are there other, intermediate
embryonic cells that might,
in similar fashion, give rise to the nervous system or
brain?
Several years ago, one of the students
in Verma's lab noticed that BRCA1 is very active
in the neuroectoderm, a sliver of
embryonic tissue containing neural stem cells that divide and differentiate into the
brain's vast assortment of cell types and structures.
«What this work shows is that you can easily get dopamine - producing neurons
in the
brain,» even from undifferentiated
embryonic stem cells, says developmental neurobiologist Ron McKay of the National Institute of Neurological Disorders and Stroke
in Bethesda, Maryland.
Two teams turned
embryonic stem cells into
brain cells, stained differently
in these pictures.
What we do know is that
in mice (and so, presumably,
in humans) FOXP2 is active
in the
brain during
embryonic development.
Previous research
in rodent disease models has shown that transplanted oligodendrocyte precursor cells derived from
embryonic stem cells and from human fetal
brain tissue can successfully create myelin sheaths around nerve cells, sometimes leading to dramatic improvements
in symptoms.
The team injected about 2000 mouse
embryonic stem cells each into the
brains of 25 rats who had previously had their dopamine - producing neurons damaged, which causes a characteristic tendency to move
in circles.
Mouse
embryonic stem cells injected into rat
brains express the AHD2 protein marker (yellow) characteristic of cells lost
in Parkinson's disease.
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.
Researchers have found that a protein critical to the
embryonic development of limbs also plays a role
in determining how the mammalian neocortex, the outer layer of the
brain, is formed.
You're going to replace every cell
in the
brain with
embryonic stem cells?»
The dynamin - related GTPase Drp1 is required for
embryonic and
brain development
in mice.
NeuroStemcell is focused on the identification and systematic comparison of progenitor cell lines with the most favourable characteristics for mesDA and striatal GABAergic neuronal differentiation, generated either directly from human
embryonic stem (ES) cells, from Neural Stem (NS) cells derived from ES cells or fetal
brain, from induced Pluripotent Stem (iPS) cells or from
in vitro short - term expanded neural progenitors from ventral midbrain grown as neurospheres (VMN, Ventral Midbrain Neurospheres) 4, and perform rigorous and systematic testing of the most prominent candidate cells
in appropriate animals models.
Jason Lee / Reuters
In the next few months, surgeons in the Chinese city of Zhengzhou will carefully drill through the skulls of people with Parkinson's disease and inject 4 million immature neurons derived from human embryonic stem cells into their brain
In the next few months, surgeons
in the Chinese city of Zhengzhou will carefully drill through the skulls of people with Parkinson's disease and inject 4 million immature neurons derived from human embryonic stem cells into their brain
in the Chinese city of Zhengzhou will carefully drill through the skulls of people with Parkinson's disease and inject 4 million immature neurons derived from human
embryonic stem cells into their
brains.
One way is to identify transcription factors, and one way to identify transcription factors
in microRNAs that can be used for reprogramming, is to screen for them through microarrays or RNA sequencing within the
embryonic brain tissue.
But things can go wrong when the
embryonic brain is being built, resulting
in a much smaller cortex.
Interneuron cell - based therapy
in AD and related models: During
brain development,
embryonic interneuron precursors are generated
in the medial ganglionic eminence (MGE) and retain a remarkable capacity for migration and integration
in adult host
brains, where they fully mature into functional inhibitory interneurons.
Human
embryonic stem cell - derived neurons establish region - specific, long - range projections
in theadult
brain
Doctors
in Moscow injected neural
embryonic stem cells into the
brain and spinal fluid of a boy suffering from a rare, disabling, inherited disease, ataxia telangiectasia.
We have shown that the presence of extra centrosomes
in proliferating
embryonic neural stem cells is sufficient to impair
brain development and culminates
in microcephaly (small
brains) at birth.
Following this, they demonstrated that neural progenitors from
embryonic stem cells could differentiate themselves into neurons
in rat
brains presenting lesions similar to those observed
in humans.
Human
embryonic stem cells grown at the University of Wisconsin - Madison randomly changed into cell types found
in the A) gut B)
brain C) bone marrow D) cartilage E) muscle F) kidney Scientists haven't learned to control the development.
Thomson still supports lifting Bush's restrictions, he said, because no one knows whether the new iPS cells can match
embryonic cells» knack for growing into any kind of tissue —
brain cells, heart muscle, insulin - producing cells and dozens of others —
in mass quantities.
1 - 4 days following DNA injection and electroporation,
embryonic brains are dissected, sliced, placed on a filter
in culture medium and live imaged over night (Baffet et al., Methods Cell Biol., 2015).
CAMBRIDGE, Mass. — Whitehead Institute scientists have identified conserved, long intervening non-coding RNAs (lincRNAs) that play key roles during
embryonic brain development
in zebrafish.