By Anonymous - 06/09/2015 06:59 - United States - Wittenberg
Add a comment - Reply to : #
7: I agree that the cause of addiction is probably a lot more complicated than just genetics and probably involves a lot more factors but there have been studies which seem to show that genetics DO play a significant part. For example a gene has been identified to do with D2 receptors (these receptors keep the flood of dopamine and sensations of pleasure/reward under control. Taking addictive substances causes a flood of dopamine and so those with fewer D2 receptors have a harder time controlling feelings of pleasure when they take these substances). Anyway, carriers of this gene I mentioned have 30% (I think) fewer D2 receptors than non-carriers. The gene is present in about 70% of alcoholics and 11% of non alcoholics. (Don't quote me on these numbers, but I'm sure it's something like that) Anyway, that's just one piece of evidence. There's lots of other evidence for the genetic role in addiction from twin studies, adoption studies etc. So people who talk about genetics when talking about addiction aren't necessarily 'excusing their addiction'. There's plenty of evidence to support them.
The genetic traits present in addicts run heavy in my family, I watch myself carefully with alcohol after going to too many funerals for family members with various vices. Just because something didn't seem to manifest in your particular family doesn't make it untrue, that is a very narrow and ignorant view of the world.
56- Evidence? It's obviously not entirely genetic, there are probably lots of factors which interact to result in addiction but, as I said in my previous comment, there is plenty of good quality evidence to suggest that genetics play a significant part. Off the top of my head, Bloom's study on D2 receptors, Shuckit's study on sons of alcoholic and non-alcoholic fathers, Bonham and Cloninger's adoption study and multiple twin studies all seem to show that genetics are of at least some importance. Obviously all studies have some flaws but still. Care to elaborate on your point?