Well, it's not that simple. It's reasonable to expect that you could see some increased level of oxidative and excitotoxicity. It's harder to draw a bright line around the dopaminergic system specifically because some level of neuronal death is expected over the course of a lifetime. We lose 5-10% starting with middle age yet don't tend to show parkinsonian symptoms until 60-80% are gone.
It's pretty reasonable to expect reversing DAT and inhibiting VMAT2 increases oxidative flux, the question is really how much not if. Methheads certainly get "brain damage", but is nudging the average loss from 5-10% to 7-12% "damage"? Is it meaningful? Over 30, 40 years that could very well add up.
Meth is also used as an ADHD treatment. I think the reason is just the dosages that are used by addicts compared to people who just need the ADHD treatment.
A typical legitimate therapeutic methamphetamine dose is around ~20mg (up to maybe 60mg a day). A typical dose used by addicts is around 1 gram. And it's usually smoked, resulting in immediate bioavailability.
In the event someone is encountering suffix trees for the first time and thinking of using one: the amount of RAM required for suffix trees is obscene.
I totally fell for the "obscene memory" trap myself. My first encounter with suffix trees outside of a textbook was for an ITA Software 'Instant Search' puzzle. The requirement was sub-0.1ms search on a large string database, I went straight for a generalized suffix tree. Then I realized they had asked for the solution to fit within a 1GB heap. :(
I've never grokkeed suffix trees, but isn't possible for them to be O(n) in space (n total length of all strings)? Is there just an unacceptable constant factor overhead? I can imagine the pointer overhead being painful.
reply