Posted 2/25/2014 12:19 AM (GMT 0)
Haha - Personally I don't think genetics have much to do with it... nor "autoimmune", but that's just my old goofy take.
Here this is from my Exploring Immunology Intro Text:
"The genetic contribution to a disease can be estimated by studying set's of identical (monozygotic) and non-identical (dizygotic) twins where one twin has the disease. If the frequency of the disease in the other twin (concordance) is higher in "identical" then "non-identical" this is strong "evidence" for genetic contribution. In most "autoimmune" diseases concordance is less than 50% in "identical" twins."
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You have to read the twin studies very closely, as it would seem that there is a very high rate between identical twins, but in actuality it is very low... same with "autoimmune". Around 20% or less.
In contrast Coeliac (oral sensitivity to gluten - or in actuality to the gliadin portion of the protein molecule) is somewhere around 70-90% in identical twins.
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Personally I think a lot of people forget that we know next to nothing about genes... and that genes are not necessarily just stationary or "fixed"... they can trigger in response to a "something"... So if a bunch of people have a "something" they may all show the same or similar gene expression.
Personally I'm more interested in just what exactly the "something" is.
Just saying, there's a WHOLE LOT to learn about genetics yet...