managing
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- Joined
- Jun 19, 2014
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Above you said that leucine inhibits autolysis. I think you meant that here too (you wrote that it induces autolysis)?I think the brain initiates autophagy a bit later that most body locations because it has access to so much blood; I would imagine that it'd be exposed to leucine from autophagy elsewhere in the body for longer.
But other things also appear to interact with the mTOR pathway besides leucine and rapamycin, so it would be expected to respond a bit differently due to the different milieu inside of each cell (i.e. cAMP). Each cell in each specific location also has different corepressors in the nucleus, prevent inappropriate DNA from being transcribed. Remember, all cells were at one time identical and have all stemmed from the mitosis of just one cell (1 ⟶ ¹⁄₂ + ¹⁄₂ ⟶ ¹⁄₄ + ¹⁄₄ + ¹⁄₄ + ¹⁄₄)—the ova, which had needed to be differentiated into other cell types and kept that way. You'd think steroid hormones, peptide hormones, oxygen gradients, pH gradients, nitric oxide, calcium, and eventually blood pressure gradients would all contribute to this process. So the simple fact that corepressors exist strongly imply that some cells will respond differently to stimulus which would normally lead to the transcription of the DNA segment onto which said corepressor is attached. Besides have experimental confirmation, there is a philosophical need for such a thing; there needs to be nuclear factors which keep a differentiated cell expressing a unique genome while containing the entire DNA library in its nucleus.
Despite the difference between cell types, I have read of nothing more effective and reliable at inducing autolysis than leucine and rapamycin.
Can you elaborate a bit on cAMP's interaction with mTOR pathway?