Komo said:
Since estrogen ataches to the DNA, how can the affinity for the receptor (ere) change within one single human being?
Do you think that polymorphisms in the estrogen responce element are present in differen tissues of the body??
Either it antagonizes or it doesn`t.....
i can´t see how the liver would detect an estrogen without the route through the estrogen receptor. Do you know any other way? I am very interested in this stuff, so if you got some more info i would be glad to read it!
/Komo
Komo you need to do some basic research, and I do not want to represent myself as an expert, either. But since your statements show a basic misunderstanding of some facts, maybe I can help clarify some points. Like I said I am not an expert either, so take my statements on a conceptual level, and draw your own conclusions. So no flames please.
Families of steroid hormones (like estradiol, estradione, etc) do not attach to the DNA, hormones interact with receptors which then influence transcription behavior in the DNA and RNA, influencing genetic expression, which proteins are produced, etc. And yes different forms of e will have different affinities for different receptors in different locations. This is why nolvadex and clomid are similiar drugs (both estergen mimickers) but with slightly different charactersitics.
As far as the liver goes, this is where most cholesterol is produced in the body. The liver's lipid metabolism is influenced by many factors, many dietary. The liver also metabolizes, or breaks-down, steroid hormones, like T and E. To illustrate, the reason they add the 17aa to the orals is to make them harder to break-down in the liver. The reason injectable test is esterified is so it will be slowly released, cause once released, it is rapidly metabolized by the liver. The metabolic breakdown of these hormones influences the cholesterol metabolism as well. Now if this is also governed by receptor influence within the liver I do not know. I suspect is just a result of metabolic clearance (hypothetically, perhaps e break-down leads to more HDL somehow).
Artherisclosis is an inflammatory condition, poor lipid profiles can make one more susceptable, but factors mentioned in other posts are all valid disease contributors and perhaps more causative. Another factor is the hormonal balance of echonosoids in the blood which influence a wide degree of potential inflammatory conditions. So many factors will influence tendency to develop disease. However, lipid profile is still accepted by most as a basic risk factor as well.
I hope this helps somewhat.