Is depression caused by inflammation?
Halibutboy Flatfish stashed this in Overcoming Adversity
What if depression were a relatively simple physical malady, like tooth decay, rather than a mysterious soul-sucking existential abyss? Among other things, we would have to stop depressed people from reaching for the ice cream and cookies...
According to a growing number of scientists, this is exactly how we should be thinking about the condition.
George Slavich, a clinical psychologist at the University of California in Los Angeles, has spent years studying depression, and has come to the conclusion that it has as much to do with the body as the mind. “I don’t even talk about it as a psychiatric condition any more,” he says. “It does involve psychology, but it also involves equal parts of biology and physical health.”
The basis of this new view is blindingly obvious once it is pointed out: everyone feels miserable when they are ill. That feeling of being too tired, bored and fed up to move off the sofa and get on with life is known among psychologists as sickness behaviour. It happens for a good reason, helping us avoid doing more damage or spreading an infection any further.
It also looks a lot like depression. So if people with depression show classic sickness behaviour and sick people feel a lot like people with depression – might there be a common cause that accounts for both?
The answer to that seems to be yes, and the best candidate so far is inflammation – a part of the immune system that acts as a burglar alarm to close wounds and call other parts of the immune system into action. A family of proteins called cytokines sets off inflammation in the body, and switches the brain into sickness mode.