123 citations
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May 2009 in “Journal of Neuroscience” In this study, researchers found that in late pregnancy, the neuroactive progesterone metabolite allopregnanolone inhibits HPA axis responses to immune challenges via an opioid-mediated mechanism.
1 citations
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October 2005 in “Experimental and Clinical Endocrinology & Diabetes” This study found that in pregnant rats, the suppression of ACTH responses to IL-1β is linked to the action of endogenous opioids and AP, with AP potentially inducing opioid inhibition through increased pENK-A expression.
October 2020 in “Authorea (Authorea)” This review discusses the influence of androgens on opioid-mediated effects and calls for further research into their role in sex differences and potential therapeutic options for chronic pain and substance use disorders.
September 2010 in “European Urology Supplements” Opioid use may lower PSA levels, suggesting a possible role in prostate cancer control; PSA testing is useful for detecting prostate cancer; serum triglycerides are not linked to prostate cancer risk; and higher urethral PSA levels may be associated with local hormone activity.
41 citations
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February 2012 in “Journal of Neuroendocrinology” This study suggests that in late pregnancy, allopregnanolone induces opioid inhibition of oxytocin secretion in response to immune challenge, potentially minimizing the risk of preterm labor in rats.