Parkinson's Disease (PD) manifests when the dopamine -
producing nerve cells in the brain are damaged and thus produce less and less of this important chemical.
Howard Hughes Medical Institute researchers have pinpointed defects in a critical cellular pathway that can lead to the death of dopamine -
producing nerve cells and ultimately symptoms of Parkinson's...
A disease which manifests when the dopamine -
producing nerve cells in the brain are damaged and thus produce less and less of this important chemical.
Researchers from Aarhus University conducted a case - control study on the condition of the dopamine -
producing nerve cells in the brain and cells that participate in the brain's immune system in people suffering from rapid eye movement sleep behaviour disorder (RBD).
The solution was targeted to each animal's striatum, a brain region involved in motor control; it is the dopamine -
producing nerve cells in this area that die during Parkinson's disease.
The scientists noted that in the area of the brain containing the serotonin -
producing nerve cells, miR135 levels increased when antidepressant compounds were introduced.
Interestingly, two additional Nature papers released simultaneously with the Regev and Kuchroo team's study revealed that ILC2 cells in the gut also express Nmur1, take on an inflammatory state when exposed to NMU, and live in close proximity to NMU -
producing nerve cells.
But it is not actually the crucial question, which is, What controls the activity of the complex interacting set of genes, which
produces a nerve cell or a muscle cell?
Nonetheless, for the researchers, «The success of our cell engineering experiments, which make it possible to
produce nerve cells in a controlled and unlimited manner, and to transplant them, is a world first.
In their work, the researchers also show how TGF - beta can be used in stem cell cultures to mass -
produce nerve cells which in turn produce the signalling substance serotonin.
During that time, 42 of these stem cells underwent a spurt of division, churning out two kinds of cells: intermediate cells that would go on to
produce nerve cells as well as mature nerve cells themselves.
«At least part of the problem is that the precursor myelin - producing cells are recruited to that area, but they fail to become adult cells capable of
producing nerve cell insulation.
The cell
produces nerve cells that help form the neocortex — the site of higher cognitive function — and likely accounts for the dramatic expansion of the region in the lineages that lead to man, the researchers say.
Not exact matches
A study shows, for the first time, how these functional impairments arise: Social isolation during early life prevents the
cells that make up the brain's white matter from maturing and
producing the right amount of myelin, the fatty «insulation» on
nerve fibers that helps them transmit long - distance messages within the brain.
These symptoms arise because
nerve cells producing the neurotransmitter dopamine, located in an area of the brain known as the substantia nigra, slowly die.
The best explanation so far, says Henrietta van Praag, a neurobiologist at the National Institute on Aging, is that exercising the heart somehow stimulates growth factors to
produce new
nerve cells in the brain.
The brain is a complex organ — a network of
nerve cells, or neurons,
producing thought, memory, action, and feeling.
In the new study, Zigmond and colleagues found damaged
nerve cells produce a stream of molecular lures that specifically attract neutrophils to injury sites in mice.
Damaged mouse sciatic
nerves produced hundreds of times the normal amount of two «chemoattractant» molecules, Cxcl1 and Cxcl2, which attach to the surfaces of neutrophils and draw the immune
cells into injured tissue.
Over the past 15 years, the GFP gene has enabled scientists to watch a plethora of previously murky biological processes in action: how
nerve cells develop in the brain, how insulin -
producing beta
cells form in the pancreas of an embryo, how proteins are transported within
cells, and how cancer
cells metastasize through the body.
They first showed that mice with severed sensory
nerves produce excessive BH4, churned out both by the injured
nerve cells themselves and by macrophages — immune
cells that infiltrate damaged
nerves and inflamed tissue.
Small energy factories can't
produce enough fuel to keep
nerves alive, so the
cells slowly die off, the thinking went.
They made the worms»
nerve cells produce molecules of double - stranded RNA (dsRNA) that match a specific gene.
Glial
cells, when activated,
produce proinflammatory cytokines that may further damage the
nerve cells.
«However, the capillary constriction
produced by pericytes may, by restricting the blood supply for a long time, cause further damage to
nerve cells even after the clot is removed.
Chen and his colleagues researched the role of microRNA molecules (small, non-coding RNA molecules that regulate various cellular activities) in the
nerve cells that
produce serotonin.
«TGF - beta functions as an important time signal that controls when a stem
cell should stop
producing one type of
nerve cell and instead start
producing another, while also gradually limiting the stem
cell's future development capacity,» says Johan Ericson, Professor of Developmental Biology, who led the study.
After initial infection, HSV enters a latent state in sensory
nerve cells, periodically reactivating to
produce disease.
One type of stem
cell can
produce multiple types of
nerve cells at different stages of the brain's development.
Two different inherited genetic variations in two different families of children with ASD «converged» to
produce the same changes in
nerve function and behavior, the researchers report in EBioMedicine, a new online translational medicine journal published by editors at The Lancet and
Cell Press.
Nerve cells in the brain of a songbird that are associated with learning and
producing birdsongs, from the lab of Todd Roberts, a U.S. BRAIN Initiative — funded scientist.
In both cases, the immune
cells produced fewer inflammatory molecules, particularly one called interleukin 17, or IL - 17, which is strongly associated with MS and very harmful to
nerve cells and their insulating covers.
The authors found that if they blocked lactate release by glia or uptake by
nerve cells, they
produced a long - lasting prevention of cocaine relapse in rodents.
Parkinson's disease occurs precisely because the group of
nerve cells in the brain that
produce dopamine stop working.
Nerve cells, for example, form long extensions that are attracted to signals from other
cells in order to
produce the network that forms the nervous system; similarly, scavenger
cells recognise the scent of harmful germs in order that they can pursue and destroy them.
Previous measurements also revealed that special
nerve cells, the so - called clock neurons,
produce PDF.
In
nerve cells, ribosomes are also found close to the synapses of the dendrites, thus enabling proteins that are required for synaptic function to be
produced close to their sites of action.
Statins reduce coenzyme Q10, which helps
produce energy for
cells and is hypothesized to have protective qualities in
nerve cells.
The team, led by Mark Mayford, created a mouse with a specific gene that
produces the protein hM3Dq when
nerve cells with this gene become active, leaving the protein attached to the
cell.
M. Rosas - Ballina and co-workers show in the same Science issue that action potentials originating in the vagus
nerve regulate splenic T
cells, which in turn
produce acetylcholine (ACh) and intercept pro-inflammatory cytokine production (1).
Frequently, a virus will infect an epithelial
cell, which compared with a
nerve cells are «real virus factories,» says Schiffer: They
produce massive amounts of virus that can infect other nearby epithelial
cells and can presumably also infect sexual partners.
Previous research has described at least some of the fundamental processes involved in healthy, on - going peripheral
nerve growth regeneration, including the critical role of mitochondria — cellular organelles that
produce adenosine triphosphate (ATP), the energy - carrying molecule found in all
cells that is vital to driving
nerve recovery after injury.
A previously unknown mechanism through which the brain
produces new
nerve cells after a stroke has been discovered at Lund University and Karolinska Institutet in Sweden.
Contrary to dogma, the human brain does
produce new
nerve cells in adulthood.
However, when the researchers genetically removed syntaphilin from the
nerve cells, mitochondrial transport was enhanced, allowing the damaged mitochondria to be replaced by healthy mitochondria capable of
producing ATP.
«The signal
produced by the PV
cell — after stimulation by the PYR
cell — was passed on to target
nerve cells and prevented them from generating action potentials of their own,» Poulet says.
These neurons are the
nerve cells that
produce dopamine, a neurotransmitter that plays a key role in the modulation of involuntary movements.
It consisted in exposing human umbilical cord epithelial
cells to the substances
produced by the
nerve cells of the previous experiment.
Developed by Janelia colleague Nicholas Sofroniew, the method
produces huge datasets that show when and where
nerve cells are active.
A number of radiotherapies that marry a small but potent amount of radioactive material and a targeted molecular compound have been gaining traction as progressive treatments for malignant NETs, which can develop wherever
nerve cells and hormone -
producing endocrine
cells are present (e.g., gastrointestinal tract, pancreas, lungs, thyroid).