Up-regulation of several silencing miRNAs of neurosteroidogenic enzymes (particularly 5-ar-1) and decreased neurosteroid levels in brains of MS patients are described, along with the link to depression:
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It’s worth noting that ED and decreased sexual desire appear to be common, but under-reported, symptoms in MS patients. It is difficult to say how much of this is due to decreased neurosteroids and how much it has to do with neurological damage of the disease:
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I have a close acquaintance who has MS who describes the emotional blunting and anhedonia that many of us have.