Jugular wrote:
Since Zamboni presumably would be aware of his own research, isn't the lack of hemosiderin testing in his CCSVI study conspicuous by its absence?
The same things bugs me about Zamboni's initial finding that all 177 healthy people in his first study did not have CCSVI - why hasn't he attempted to replicate this finding and silence the critics? Especially when so much of his argument depends on it.
We know that there are iron clusters around the vasculature in MS - these clusters may or may not be there because of poor venous drainage. Some believe that this iron is causing MS (CCSVI > IRON > MS) but there is also the possibilty that the MS disease process is causing the iron clusters in some other way. Zamboni's argument is that CVI is associated with similar iron clusters, so why not CCSVI? However, there is also the possibility that the clusters are there for a completely different reason, or that even if they were found to be there because of CCSVI, they are not involved in actually causing MS.
What other reason could there be for the iron clusters? Perhaps because of iron overload as a result of faulty
iron metabolism. It was discovered a couple of years ago, that there is metabolic disregulation causing iron overload in MS (Abo-Kryshna 2008). It's a hugely complicated area to understand unless you are an expert in iron. Every nerve cell needs oxygen to work properly - so hemoglobin (oxygen bound to iron) is used to transport oxygen to wherever it is needed. Once the hemoglobin gets to the neurons things seem to go wrong in the metabolic process in those with MS. There is a protein called transferrin receptor (TfR) that is found in the endothelium wall of capillaries. It is a kind of docking mechanism for iron within each cell - the means by which iron is allowed in, for example to facilitate energy release. TfR decides the amount of iron taken up by nerve cells. Abo-Kryshna and his team discovered that iron overload was occuring in the brains of those with MS, and that this was due to very much higher levels of TfR.
http://www.ncbi.nlm.nih.gov/pubmed/18408021
Does this metabolic difference occur as a result of the MS disease process? Could it be part of MS pathology? Does it result in an overspill of iron in surrounding tissues? Could it be intended as a benign balancing act, e.g. to provide extra iron for myelin repair? Who knows, but I can't make this discovery fit in with the venous reflux theory of MS - maybe someone else can .
Faulty iron metabolism causes a demyelinating disease very similar to MS. Friedreich's Ataxia is a rare, hereditary disease that has syptoms very similar to MS. The faulty iron metabolism is caused by a defective gene.
Restless Leg Syndrome (common in those with MS) is also now known to be caused by faulty iron metabolism.
Similar free iron deposits to those in MS are found in Parkinson's Disease, Alzheimer's and other neurological diseases.
gainsbourg