http://www.vaccinationnews.org/DailyNews/May2002/MechEncephDamVax.htm I have studied this for years since my sons disorder in 2000 which he later died from. The proteins and mechanisms in the liver related to long chain fatty acids breakdown are directly connected with development of early myelin sheath development and very important in the formative years. Under 2 years old it’s dangerous to stress out this system. Many of these type of disorders are found to be related to demyelinization or lack of it. This imho is directly connected with causing mitochondrial disfunctions. http://www.ageofautism.com/2009/07/solving-the-autism-puzzle-the-fatty-acid-question-and-big-fat-neurons.html
http://pediatrics.aappublications.org/content/118/2/e460 some more on this topic.
Oh, my.
First of all, neither "age of autism" nor "vaccination news" are reputable sites. The first article you linked, at "vaccination news," describes absolutely NO mechanism that would plausibly link vaccines to any kind of brain damage. Sure, it mentions demyelination and it mentions vaccines, then it goes into some nonsensical mumbo jumbo containing sciency words like "proteins" and so forth, and then it talks about some really old experiments and draws completely wrong conclusions about them. However, nothing it says actually corresponds with what is known about neurology or about immunology. Being a medical researcher with several years of experience with vaccines, I am quite able to recognize nonsense, even if it contains sciency-sounding words. But the target audience of such websites is not knowledgeable people like me--it is people that have no science education and thus cannot evaluate the validity of the "information."
The "age of autism" article also contains a lot of sciency-sounding mishmash, which I can't help but notice was written by Kent Heckenlively, Esq--a lawyer??? He apparently considers himself qualified to speak on vaccines since he spent 8 whole weeks investigating the expression of micro-RNAs in a monkey model of Ebola infection at Lawrence Livermore National Labs (which do not, as far as I know, have containment sufficient to study live Ebola). He mentioned a book chapter about autism written by Patricia Kane, Ph.D, Annette Cartaxo, M.D., and Richard Deth, Ph.D and even claims to have spoken with Dr. Kane--but all he does is relate information from the book chapter without actually tying it to vaccines. The book chapter does mention that the immune system seems to be activated in autistic brains--but immune system involvement does NOT mean that vaccines are connected. All children, unless they live in a sterile bubble, are exposed to countless thousands of antigens every single day that stimulate their immune systems. The roughly 350 antigens that a child is exposed to from vaccinations are insignificant in quantity next to children's typical daily exposures to antigens. The only difference between vaccine antigens and other antigens is that the antigens contained in vaccines come from organisms that can seriously injure or even kill a child who becomes infected from them.
The last article you linked appears to be a legitimate medical journal article. I cannot access the entire article, since it is behind a pay wall, but the abstract tells me that it discusses vaccination strategies for patients with metabolic disorders--a FAR cry from implicating vaccines in autism.
I do not know what disorder killed your son, so I cannot discuss it, beyond saying that it sounds like it was a genetic disorder (which are not uncommon). I am sorry for your loss.