However, a conversation with Alasdair Coles and a chance conversation elsewhere got me thinking again. The upshot of the conversation with Alasdair was that MS is actually a group of diseases, not just one. The other conversation forced me to revisit my investigations into mitochondrial disease.
Excuse the rambling nature of the thoughts below but I'm trying to get things straight in my head and hopefully by just jotting a few things down others will come along and either tear down, or help me build on my thoughts.
Firstly if we examine the classic RRMS we know that demyelination occurs. This may be as a result of an auto-immune reaction. Following DeMyelination there is redistribution of Sodium Channels along the Axon and Mitochondria are recruited to the DeMyelinated regions, to meet the increased energy requirements necessary to maintain Conduction. The Mitochondria present within the chronically DeMyelinated Axons will be functioning at full capacity. The Axon may well be able to function for many years due to these adaptive mechanisms. But, eventually, despite AntiOxidant defences, free radical damage will accumulate and Mitochondrial function will become compromised. The actual cause of cell death could be due to a number of mechanisms related to Mitochondrial dysfunction including failure of Ionic homeostasis, Calcium influx, Mitochondrial mediated cell death or impaired Axonal Transport.
The switch from the RRMS stage to the progressive phases can be caused by an induced mitochondrial dysfunction.
We all know that the classic model doesn't really fit the cases that present as progressive from the outset. We also know from the work of Luchinetti et. al. that there are perhaps four different and distinct lesion patterns. Perhaps we can argue that these cases are mitochondrial diseases that present without the auto-immune component.
One of the things that has baffled me, and I suspect many others is the variety of treatments that appear to work for some yet not for others.
For starters we have the CPn / ABX regimen. Many may think that I am against this regimen given some of my recent postings. That actually isn't the case. I do believe that the ABX regimen will help a subset of MS patients. I just don't believe in the one size fits all. It is known that CPn can affect mitochondrial function, even to the point of inducing apoptosis. Perhaps for those that initially present with a progressive course trying the ABX regimen would be a good start.
Then of course we have the diet regimens.
In other mitochondrial diseases, some researchers are trying very low carbohydrate diets to reduce the workload for mitochondria. Perhaps evidence for the paeleolithic diet being effective in some cases.
In addition vitamins such as thiamine (B1), riboflavin (B12), vitamin C, and vitamin E. Lipoic acid and coenzyme Q-10 are useful supplements in other mitochondrial diseases. They also appear to be effective for some MS patients. The recent posts on leptin brought up another area. Leptin is known to be the primary mitochondrial signalling mechanism.
I would bet that statins have a role in regulating the mitochondria as well.
I haven't really studied LDN but I suspect that there may be something to that as well for the more progressive forms.
It is known that Alzheimers and Parkinsons are mitochondrial diseases. Can we add at least some patterns of MS to that list as well?
Just a few thoughts... Feel free to scribble all over them

Robin.