63 citations
,
December 2010 in “Journal of Endocrinology” This study found that decreased allopregnanolone levels through inhibition or intrauterine growth restriction in guinea pigs were linked to altered brain development markers, suggesting a role for neurosteroids in fetal brain protection and development.
61 citations
,
January 2008 in “Biological & Pharmaceutical Bulletin” In this study, finasteride dose-dependently inhibited stress-induced increases in allopregnanolone in rats, while enhancing 20alpha-reduction of progesterone without affecting 3alpha-dihydroprogesterone or 11-deoxycorticosterone levels.
60 citations
,
December 2013 in “PLoS ONE” The researchers found that inhibiting soluble epoxide hydrolase, either genetically or pharmacologically, delayed the onset of chemically induced seizures related to GABA antagonism in experimental models.
60 citations
,
June 2007 in “Pharmacology Biochemistry and Behavior” In this study, withdrawal from progesterone and treatment with finasteride were associated with increased signs of depression-like behavior in female mice, suggesting decreased allopregnanolone levels may play a role.
59 citations
,
November 2018 in “Psychoneuroendocrinology” This study suggests that cerebrospinal fluid levels of the neurosteroids allopregnanolone and pregnanolone correlate negatively with PTSD and negative mood symptoms, with potential sex-specific differences in synthesis enzyme blocks.
49 citations
,
July 2008 in “Alcoholism Clinical and Experimental Research” This study found that finasteride dose-dependently blocked the acquisition of ethanol drinking in mice and maintained reduced consumption even after treatment ended.
48 citations
,
January 2011 in “Neuropharmacology” Isolation stress in rats reduces brain enzyme levels, affecting dopamine function.
48 citations
,
February 1999 in “PubMed” This study found that the anticonvulsant effects of progesterone against PTZ-induced seizures in mice require conversion to allopregnanolone, as shown by the reversal of these effects with a 5alpha-reductase inhibitor.
48 citations
,
November 1992 in “International Journal of Dermatology” This article discusses the history and terminology of toxic epidermal necrolysis but reports no new clinical results.
47 citations
,
January 2016 in “Brain Behavior and Immunity” 5α-reduced progestogens may reduce mood issues and brain damage linked to HIV-1 Tat.
44 citations
,
February 2009 in “Pain” This study found that progesterone can inhibit spinal reflex potentiation in ovariectomized rats through GABA(A) receptor activity, mediated by neurosteroid metabolism rather than direct progesterone receptor action.
40 citations
,
December 2019 in “Neurobiology of Stress” This review focuses on neuroactive steroids' influence on GABA-ergic signaling and discusses challenges in developing them for various therapeutic uses, citing recent excitement from FDA approval of allopregnanolone for postpartum depression but reporting no new results.
36 citations
,
July 2005 in “Journal of Neuroendocrinology” This study suggests that both the central biosynthesis and metabolism of progesterone to 3α,5α‐THP in the ventral tegmental area are crucial for facilitating lordosis in female rats.
36 citations
,
June 2001 in “Neuroscience Letters” This study found that finasteride increased fetal arousal activity in late gestation sheep by suppressing pregnane steroid synthesis, suggesting reduced GABAA receptor-mediated inhibition.
35 citations
,
September 2009 in “Psychoneuroendocrinology” Early-life neurosteroid changes affect adolescent exploration and adult behavior.
35 citations
,
January 2005 in “Brain Research” This study indicates that progesterone’s anesthetic activity in PR knockout mice is not due to progesterone receptors but is partially mediated by the neurosteroid allopregnanolone through GABAA receptor potentiation.
32 citations
,
September 2010 in “Stress” This study found that suppressing allopregnanolone production in late gestation fetal sheep altered CNS activity and behavioral responses to transient asphyxia, effects mitigated by an analog co-infusion.
30 citations
,
May 2019 in “Scientific Reports” This study found enhanced remyelination in the corpus callosum of late pregnant rats compared to virgin and postpartum rats, suggesting a pregnancy-associated promyelinating effect mediated, in part, by the GABA A receptor system.
30 citations
,
February 2003 in “Annals of Neurology” This editorial discusses the hormonal basis of catamenial epilepsy, particularly focusing on the roles of progesterone and neurosteroids, and presents no new research findings.
27 citations
,
January 2017 in “Neuropsychopharmacology” This study found that acute sleep deprivation enhanced 5α-reductase expression and activity in the rat prefrontal cortex, and finasteride treatment reduced associated psychosis- and mania-like behaviors.
27 citations
,
April 2008 in “Neuroscience Letters” Olanzapine reduces stress-related anxiety in rats when given acutely.
27 citations
,
April 2007 in “European Journal of Pharmacology” Progesterone increases alcohol tolerance and withdrawal anxiety, while DHEAS prevents them.
26 citations
,
July 2012 in “Epilepsy & Behavior” This study found that progesterone significantly delayed epileptogenesis development in a mouse model, and its effects were inhibited by finasteride, highlighting the potential role of neurosteroids in modifying epilepsy progression.
26 citations
,
March 2006 in “Endocrine, metabolic & immune disorders. Drug targets” This article discusses the functions of the enzyme 17beta-HSD10, including its role in steroid metabolism and potential links to Alzheimer's disease, but reports no new experimental findings.
24 citations
,
July 2016 in “Steroids” In this study using rat hippocampal cultures, progesterone and testosterone showed neuroprotective effects against oxygen-glucose deprivation-induced neuronal cell death, while metabolism of these hormones in the brain may affect their protective actions.
21 citations
,
January 2020 in “General and Comparative Endocrinology” This review examines the diverse roles of SRD5α enzymes across species, focusing on their involvement in steroid synthesis, sexual development, and various physiological processes, but reports no new clinical results.
21 citations
,
September 2008 in “Brain Research” Neurosteroids in the brain can increase or decrease seizure risk in mice.
19 citations
,
June 2013 in “Journal of Neuroendocrinology” This study suggests that neurosteroids, particularly allopregnanolone, may play a crucial role in the progression and management of epilepsy, as indicated by their effects on seizure modulation in both rats and humans.
19 citations
,
June 2006 in “Physiology & Behavior” Finasteride slows down motherly behavior in first-time pregnant rats.
18 citations
,
September 2021 in “Journal of Neuroendocrinology” This review discusses how neurosteroids acting on GABAA receptors may influence behavior and explores the potential for developing selective modulators for treating psychiatric disorders, but reports no new clinical results.