Previous work by Freeman's lab identified another enzyme, a gene called SARM, which was the first shown to activate a process that
causes axons to disintegrate when damaged.
Maniatis and colleagues found that deleting one group of genes in the cluster didn't
cause the axon tangling, leaving two possible suspects.
The findings raise the possibility that blocking the Phr1 protein with a drug could keep damaged axons alive and functional when the body would normally
cause the axons to self - destruct.
Another stretch — even a moderate one — can
cause the axon to go haywire.
Unfortunately, in neurons exposed to toxicants such as the mercury in thimerosal, the structural building blocks of the axon (molecules called tubulin) are disassembled,
causing the axon to disintegrate.
A research team led by Michal Schwartz of Israel's Weizmann Institute of Science grew these immune cells in a laboratory and implanted them into rats, and the transplants of the cells
caused the axons to regenerate.
Not exact matches
This interrupts the transport of cellular materials along axonal microtubules,
causing these materials to accumulate at several points along the
axon where they may give rise to varicosities.
Researchers from The Ohio State University have announced they have discovered how blows to the head
cause numerous small swellings along the length of neuronal
axons.
In 2011 researchers found that these waves of electricity
cause neurons in the hippocampus, the main brain area involved with memory, to fire backward during sleep, sending an electrical signal from their
axons to their own dendrites rather than to other cells.
When you stimulate a neuron, ions like sodium and potassium and chloride flow back and forth,
causing what's called an action potential to travel down the neuron, through the
axon, to a synapse.
The other is that the virus itself directly attacks neural cells and destabilizes the myelin sheath around them or damages
axons to
cause GBS.
Concussions that lead to lasting brain dysfunction
cause SNTF to accumulate in vulnerable long
axon tracts of the brain, and its blood elevation is a measure of this diffuse axonal injury.
As part of the new study, the researchers showed that intact
axons without Phr1 were protected from the damage
caused by vincristine, a chemotherapy drug used to treat leukemia, neuroblastoma, Hodgkin's disease and non-Hodgkin's lymphoma, among other cancers.
These electrical pulses travel along specialized extensions called
axons to
cause the release of chemical signals elsewhere in the brain.
The ISP drug did not
cause spinal cord
axons known to control movements to cross the scar and reconnect with brain neurons above the injury site.
In the central nervous system, severing
axons causes the entire neuron to die quickly, but why they die has been a mystery.
A moderate stretch to an
axon, Smith recently found,
causes the sodium channels to malfunction.
There are two categories of CMT: those
caused by the loss of
axons in the peripheral nerves (CMT2) and those characterized by a malfunction in the Schwann cells that make up the myelin sheath, the protective coating that surrounds the nerve fibers and allows them to conduct nerve signals at high speeds (CMT1).
Viral DNA that jumped into our ancestors» genes millions of years ago may contribute to the chewed up
axons (blue cylinders) that
cause multiple sclerosis.
MS is a debilitating neurological disease
caused by the destruction of oligodendrocytes, cells that build the myelin sheaths that surround the signal transmitting
axons of neurons.
«In this case, the loss of
axons is not
caused by disease,» DiAntonio said.
Our goal is to use a new imaging system to monitor damage
caused by AD to the brain region that contains the insulated
axons (analogous to cables) connecting the neuron cell bodies (analogous to the central processing unit of a computer).
This disruption
causes a change in the way light interacts with the tissue, such that the
axon bundles exhibit less birefringence and also lower reflectance (back scatter).
This injury severs descending, supraspinal
axons and
causes chronic deficits in both fore - and hind - limb motor function [32], which can be detected by the grid - walk behavioral test [33].
Therefore understanding the dysfunctional molecular pathways that
cause mDA axonal degeneration, and targeting these to protect or re-grow mDA
axons, may be a promising therapeutic approach for PD.
He has found that the mutant HD protein
causes traffic jams in
axons, slowing down traffic in neurons.
Scientists do know that a severed
axon will
cause a neuron to quickly lose some of its incoming connections from other neurons.
Real schizophrenia is more than 10 % brain use
caused by the gene DISC1
causing more linkage between the brain's neurons by the growth of more
axons and dendrites than normal.
This can
cause injury to the brain's neurons and
axons (i.e. the brain's «internal wiring») and prevent them from functioning properly.