Wednesday, 1 October 2008

Rats at a rave

ResearchBlogging.orgThe illegal recreational drug ecstasy, also known as X, or MDMA (an abbreviation of its chemical formula), is popular in the rave scene and is used to induce euphoria and enhance the experience of dancing and loud music. The drug is considered relatively safe by the average raver due to its short term effects, despite having received publicity for various dangers identified by scientific research.

Ecstasy pills

The most widely known (undesired) effect of the drug is overexertion and sweating, leading to the ecstasy user drinking large amounts of water and being in danger of hyponatremia (the depletion of solutes from the blood plasma), which can eventually lead to cerebral edema. The drug has also been known for causing “holes in the brain”, Parkinsonian tremors, and permanent brain damage from single use, however these claims have been discredited* and retracted from the literature (1). Some research has shown that the drug may not be as toxic as once thought when used in moderation, but that does not address whether environmental effects could change the action of the drug and potentially make it more dangerous than a “traditional” toxicity study might suggest.

Research conducted in Italy and published in 2006 (2) has shown that not only does the drug enhance the rave experience for the user, but this works both ways, with the loud music physically enhancing the effect of the drug. Rats were given various doses of MDMA and treated to a surely exciting 4 hours of white noise at 95 dB (the loudest level permissible in Italian night clubs) while electrocortical activity in their brains was monitored by electroencephalography. Controls were conducted with rats treated with saline instead of MDMA, as well as both treatments without sound. ECoG monitoring was repeated over 5 days without administration of the drug or sound in order to study long term effects. The ECoG “spectrum power” was taken to be indicative of higher neural function in rats.

The data showed that a low dose of MDMA combined with sound caused decreased ECoG spectrum power significantly different from control, but no significant effect when MDMA was administered without sound. A high dose of MDMA combined with sound produced a dramatic effect that lasted for 5 days, while all other treatments had no long term effects. This powerful data shows a synergistic relationship between exposure to loud noise and the effect of MDMA on higher neural function, and suggests that higher doses only have long term effects when combined with loud noise. The authors do not suggest a possible mechanism for this effect, but they do warn that the drug may be more dangerous than commonly thought since most ecstasy users combine the drug with loud music.

* As a side note, some legislation around ecstasy was driven by the above mentioned discredited “findings”, which is disconcerting. An example is the RAVE act (3), introduced in 2002 by current Democratic VP candidate Joe Biden as part of the War On Drugs, which allows the law to shut down clubs and raves if ecstasy use is suspected to occur on their premises. The drug is still a dangerous one, but one would hope that laws would be revised after research they were based upon is discredited, which they were not.


1. Ronald Bailey: “The Agony of Ecstasy Research”. ReasonOnline.
Michelangelo Iannone, Stefania Bulotta, Donatella Paolino, Maria Zito, Santo Gratteri, FrancescoS Costanzo, Domenicantonio Rotiroti (2006). Electrocortical effects of MDMA are potentiated by acoustic stimulation in rats BMC Neuroscience, 7 (1) DOI: 10.1186/1471-2202-7-13


Catarina Vicente said...

hehe, and they say that animal research is bad for the little things- people are paying I dunno how much for this kind of stuff, and rats get it for free?!

How did the doses given to the rats translate to what humans normally take? I mean, is what they call a high dose realistically close to the normal 'rave-dose' level?

James Lloyd said...

interesting. sounds like a positive feedback cycle in a way. taking it affects you but then loud music interacts with 'it' to increase and/ or alter the affects.

but i can't see the law changing tho. science moves faster than politics. i am sure it is popular with most voters and i think the US has bigger worries for the foreseeable future! i think the law will stay in place because they see no good reason to change it. the reason the law was created may have been dis proven but anti-drug campaigns i am sure are a popular thing with most voters and they can turn around and ask what happen in 10 years when scientists change there minds. who ever said politicians were sensible or useful!

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