Anticonvulsant activity of androsterone and etiocholanolone
Rafal Marian Kaminski; Herbert Ryan Marini; Won-Joo Kim; Michael A. Rogawski
Epilepsia2005
Summary (paraphrased)
Men with epilepsy often show sexual or reproductive abnormalities attributed to altered androgen levels, including subnormal free testosterone, and the testosterone metabolites androsterone (5α-androstan-3α-ol-17-one) and its 5β-epimer etiocholanolone may also be reduced. Androsterone is a neurosteroid that acts as a positive allosteric modulator of GABA-A receptors; it is found in adult brain, and both metabolites circulate in substantial quantities along with their glucuronide and sulfate conjugates. The study tested whether these endogenous steroids protect against seizures, establishing that androsterone has genuine CNS bioactivity rather than being a mere excretory byproduct.
Why it’s in the corpus
establishes androsterone's own GABA-A bioactivity — the mechanistic basis of the buildup hypothesis
Why it’s in the systems review
Powers' androsterone-buildup thread treats androsterone as pharmacologically meaningful, not inert waste. This paper is the peer-reviewed anchor for that claim: androsterone is a GABA-A positive allosteric modulator with demonstrated anticonvulsant activity, so its accumulation or depletion has plausible neuropsychiatric consequences. That turns androsterone from a clearance-pathway footnote into a candidate mediator in the causal-pathway search, and it links the steroid-clearance axis (MECH-049) to functional CNS effects.
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