A major focus on Parkinson’s research is inflammation.
Inflammation is a vital part of our immune system’s response to infection or injury. It is means by which the body signals to the cells of immune system that something might be wrong and help is required. It is a complex, multi-stage process, involving many different mechanisms which help to amplify and resolve the response.
Recently, some researchers reported some interesting data regarding the ‘resolving’ aspect of the inflammatory response in Parkinson’s. It involved a protein called Resolvin.
In today’s post, we will look at what Resolvin is, what the new research reported, and how this information could be useful in the development of future therapies for Parkinson’s.
Spot the unhealthy cell – exhibiting signs of stress (yellow). Source: Gettyimages
When cells in your body are stressed or sick, they begin to release tiny messenger proteins which inform the rest of your body that something is wrong.
When enough of these messenger proteins are released that the immune system becomes activated, it can cause inflammation.
What is inflammation?
Inflammation is a critical part of the immune system’s response to trouble. It is the body’s way of communicating to the immune system that something is wrong and activating it so that it can help deal with the situation.
By releasing the messenger proteins (called cytokines), injured/sick cells kick off a process that results in multiple types of immune cells entering the troubled area of the body and undertaking very specific tasks.
The inflammatory process. Source: Trainingcor
The strength of the immune response depends on the volume of the signal arising from those released messenger proteins. And there are processes that can amplify the immune response.
But an important component of the immune response that is often overlooked is resolution.
Once an infection/injury has been dealt with, the immune response must be resolved. And there are tiny messenger proteins that our body producing naturally which involved in dampening down the immune response. They are typically released when a situation has been resolved.
One group of resolving messenger proteins are called Resolvins.
What are Resolvins?
This week Austrian biotech firm, AFFiRiS AG, made an announcement regarding their experimental immunotherapy/’vaccine’ approach for Parkinson’s.
In their press release, the company provided the results of a long-term Phase I clinical trial testing the tolerability and safety of their treatment AFFITOPE® PD01A.
The treatment was found to be safe and well-tolerated in people with Parkinson’s. But there was one sentence which was particularly intriguing in the press release regarding clinical symptoms.
In today’s post, we will discuss what is meant by ‘immunotherapy’, outline what this particular clinical trial involved, review the results, and explore what this could mean for the Parkinson’s community.
I have previously mentioned on this website that any ‘cure for Parkinson’s’ is going to require three components:
- A disease halting mechanism
- A neuroprotective agent
- Some form of cell replacement therapy
This week we got some interesting clinical news regarding the one of these components: A disease halting mechanism
Clinical trial results from Austria suggest that a new immunotherapy approach in people with Parkinson’s is both safe and well tolerated over long periods of time.
What is immunotherapy?
In this post we discuss several recently published research reports suggesting that Parkinson’s disease may be an autoimmune condition. “Autoimmunity” occurs when the defence system of the body starts attacks the body itself.
This new research does not explain what causes of Parkinson’s disease, but it could explain why certain brain cells are being lost in some people with Parkinson’s disease. And such information could point us towards novel therapeutic strategies.
The first issue of Nature. Source: SimpleWikipedia
The journal Nature was first published on 4th November 1869, by Alexander MacMillan. It hoped to “provide cultivated readers with an accessible forum for reading about advances in scientific knowledge.” It has subsequently become one of the most prestigious scientific journals in the world, with an online readership of approximately 3 million unique readers per month (almost as much as we have here at the SoPD).
Each Wednesday afternoon, researchers around the world await the weekly outpouring of new research from Nature. And this week a research report was published in Nature that could be big for the world of Parkinson’s disease. Really big!
On the 21st June, this report was published:
Title: T cells from patients with Parkinson’s disease recognize α-synuclein peptides
Authors: Sulzer D, Alcalay RN, Garretti F, Cote L, Kanter E, Agin-Liebes J, Liong C, McMurtrey C, Hildebrand WH, Mao X, Dawson VL, Dawson TM, Oseroff C, Pham J, Sidney J, Dillon MB, Carpenter C, Weiskopf D, Phillips E, Mallal S, Peters B, Frazier A, Lindestam Arlehamn CS, Sette A
Journal: Nature. 2017 Jun 21. doi: 10.1038/nature22815.
In their study, the investigators collected blood samples from 67 people with Parkinson’s disease and from 36 healthy patients (which were used as control samples). They then exposed the blood samples to fragments of proteins found in brain cells, including fragments of alpha synuclein – this is the protein that is so closely associated with Parkinson’s disease (it makes regular appearances on this blog).
What happened next was rather startling: the blood from the Parkinson’s patients had a strong reaction to two specific fragments of alpha synuclein, while the blood from the control subjects hardly reacted at all to these fragments.
In the image below, you will see the fragments listed along the bottom of the graph (protein fragments are labelled with combinations of alphabetical letters). The grey band on the plot indicates the two fragments that elicited a strong reaction from the blood cells – note the number of black dots (indicating PD samples) within the band, compared to the number of white dots (control samples). The numbers on the left side of the graph indicate the number of reacting cells per 100,000 blood cells.
The investigators concluded from this experiment that these alpha synuclein fragments may be acting as antigenic epitopes, which would drive immune responses in people with Parkinson’s disease and they decided to investigate this further.