There was some big news for OCDers
this past weekend: Scientists discovered a specific brain receptor that could
be triggered to cause OCD-like symptoms in mice, including anxiety and
overgrooming.
And much more exciting, scientists
also figured out how to “unstick” the OCD response in that receptor — causing
symptoms to disappear almost immediately.
According to an article on Fox News about the study:
Several years ago, researchers
noticed that mice who were engineered to lack a gene called Sapap3 started grooming
compulsively. These researchers looked more closely and found that one of the
problems with these mice was that a brain receptor called mGluR5 was
overactive.
Researchers weren’t sure if that
receptor was relevant, or if it was just a coincidence, so they used an
experimental drug to block it. The mice’s OCD symptoms disappeared, and they
disappeared immediately.
The study also added some credence to
the theory that OCD is caused when our brains get stuck in an anxiety response:
“Normally this receptor gets turned
on when the neurotransmitter is released from a connected cell,”
senior author Dr. Nicole Calakos explained. “In these mouse brains, the
receptor is on all the time whether or not the transmitter is coming from the
other cell.”
So what does that mean for us? Not
much, at the moment. There will need to be a lot more research, both into mice
with OCD-like symptoms to determine if that receptor is always responsible, and
into humans with OCD to see if the cause for us is the same. There will also,
of course, need to be FDA trials of the experimental drug researchers used to
block the mGluR5 brain receptor, to make sure that it’s safe, find out any side
effects, and make sure there are no long-term problems associated with its use.
But it does mean that, a few years
from now, we might be able to “turn off” our OCD without experimenting with
various antidepressants and exposure therapy and other treatments that take
time and work to kick in. And it sounds like it’s much less dangerous than some
of the current last ditch treatmentsbeing investigated for OCD, such as deep
brain stimulation.

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