RNA is the lesser-known ‘cousin’ of DNA – it contains copies of genetic instructions sent out from the nucleus – the ‘control hub’ of every cell. This RNA is carried out of the nucleus by lots of different proteins, including the RNA-binding proteins TDP-43 and FUS, which act as ‘couriers’ dropping off their RNA at the right part of the cell and then returning to the nucleus for the next package.
These binding proteins both play an important role in motor neurone health. In motor neurones affected by MND, the TDP-43 and FUS seem unable to make their way back to the nucleus so they form clumps in other parts of the neurone. How and why this happens is not really understood and several presentations on the first day of the Symposium provided insight into what might be going wrong. Dr Brian Dickie, Director of Research Development at the MND Association, summarises these presentations in his blog Libraries, Doormen and Harry Potter. You can also hear Brian talk about RNA proteins on the Symposium website. Continue reading →
There is recent evidence to suggest that Human Endogenous Retroviruses (HERVs) may be involved in amyotrophic lateral sclerosis (ALS). HERV-K has been directly linked to motor neurone damage and has been found in the brain tissue of patients with ALS.
The MND Association recently awarded a small grant to fund part of the ‘Lighthouse Project’ which is investigating the safety and any beneficial effects of an antiretroviral drug on ALS symptoms. Continue reading →
Researchers from the Flinders University, Australia and University of Miami have discovered a new protein that can act as a biomarker to track disease progression in people with MND. A paper written under the leadership of Dr Shepheard and Dr Rogers was published today in the research journal ‘Neurology’.
What is p75 and what do we know so far
The biomarker is a protein called p75, which initially
supports the growth of neurones during embryonic development and its levels markedly decrease after birth. Throughout our lives, p75 only reappears in higher levels when the body detects injury of the nervous system, and shows its presence in urine.
The researchers have previously shown that, after birth, mice with a mutation in the SOD1 gene, known to cause MND, had high levels of p75 after about 40 days from the onset of MND. This also coincided with increased levels of p75 in motor neurones found in tissue of people with MND after death.