26 citations
,
July 1995 in “Neurobiology of Aging” Finasteride affects prostate weights and pituitary activity differently with age.
17 citations
,
August 2010 in “International Journal of Cosmetic Science” This study found that a cosmetic formula containing 2% Orthosiphon stamineus leaf extract significantly reduced skin oiliness and pore size, showing better results than a formula with 1% zinc gluconate.
45 citations
,
February 2005 in “Steroids” This study reported that certain newly synthesized steroidal derivatives showed stronger inhibitory activity against the 5α-reductase enzyme than finasteride in hamsters, suggesting their potential as enzyme inhibitors.
3 citations
,
December 2021 in “Frontiers in Pharmacology” This study found that Ficus benghalensis leaf extracts reduced the activity of 5 α-reductase II and promoted hair growth in rabbits by elongating the hair follicle's anagen phase, suggesting potential for treating hair loss.
June 1993 in “Current opinion in therapeutic patents” This study reports that novel hexahydrobenzoquinolin compounds fully inhibited 5α-reductase activity in human genital skin fibroblasts, suggesting their potential for treating conditions like benign prostatic hyperplasia and male pattern baldness.
17 citations
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May 1998 in “Steroids” This study constructed a model to predict finasteride's inhibitory activity on 5α-reductase type 2 and calculated that a 1 μM plasma concentration, after 50 mg administration, matches prostate inhibition levels.
15 citations
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October 2014 in “Hormone Molecular Biology and Clinical Investigation” This report advances the hypothesis that finasteride and dutasteride inhibit 5α-reductase activities, potentially altering steroid metabolism and increasing the risk of insulin resistance, diabetes, and vascular disease.
4 citations
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June 2020 in “Processes” This study suggests that G. sibiricum has potent aldose reductase inhibitory activity, primarily due to kaempferol rhamnosides, and may be further explored as a natural treatment for diabetes-related complications.
49 citations
,
October 2017 in “Nutrients” This study observed that the ethyl acetate extract of Equisetum debile showed high activity against 5α-reductase and lipid peroxidation with no cytotoxicity on dermal papilla cells.
42 citations
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May 2003 in “Mini-reviews in Medicinal Chemistry” This study found that newly synthesized steroidal trienones demonstrated stronger 5α-reductase inhibitory activity compared to dienones in various biological models, suggesting potential for developing enhanced antiandrogenic drugs.
June 2023 in “International journal of pharmaceutical quality assurance” This study found that Eclipta alba extracts exhibit 5α-reductase inhibitory activity, with the methanolic extract showing a higher concentration of β-sitosterol compared to petroleum ether extract, indicating potential for treating androgenic conditions like male pattern baldness.
27 citations
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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.
5 citations
,
January 2014 in “Molecular Simulation” This study discovered a potential new 5α-reductase type II inhibitor with higher predicted activity than finasteride, suggesting it as a promising candidate for treating benign prostatic hyperplasia.
78 citations
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January 2000 in “Gynecological Endocrinology” This study found that the progestins norgestimate and dienogest may help treat clinical hyperandrogeny in women by inhibiting skin 5 alpha-reductase activity with minimal androgenic potential.
69 citations
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December 2011 in “Journal of Ethnopharmacology” This study found that Carthamus tinctorius exhibited the strongest 5α-reductase inhibitory and hair growth promoting activities among evaluated Thai herbs, suggesting potential for developing alternative hair loss treatments.
October 2024 in “International Journal of Ayurveda Research” This study evaluated the 5α-reductase inhibitory effects of several Ayurvedic herbs and found that Eclipta alba exhibited the highest activity, suggesting its potential for use in treatments for androgenic disorders like alopecia.
August 2019 in “Key engineering materials” This study found that Carthamus tinctorius floret extract, at a concentration of 0.05 mg/mL, significantly inhibited 5α-reductase activity in DU-145 cells more effectively than standard treatments finasteride and dutasteride, with a stable microemulsion formulation enhancing its skin permeation and stability.
44 citations
,
January 2007 in “Biological & pharmaceutical bulletin” This study found that Piper nigrum leaf extract showed in vivo anti-androgenic activity and potent 5α-reductase inhibitory effects, with piperine and (−)-cubebin identified as active components.
March 2023 in “International Journal of Applied Pharmaceutics” In this study, researchers formulated a topical gel containing β-sitosterol for alopecia treatment and found it demonstrated good 5 alpha reductase inhibitory activity in vitro, comparable to a commercial product, indicating its potential for further antiandrogenic activity investigation.
12 citations
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March 2017 in “Medicinal Chemistry Research” This study found that certain curcumin analogs derived from natural plant sources exhibit anti-androgen activity by inhibiting steroid 5-alpha reductase, identifying key structural features for their potency and safety in treating androgen-related conditions.
3 citations
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October 2015 in “Human Psychopharmacology-clinical and Experimental” In this study, finasteride was found not to be associated with changes in sleep spindle activity or morphology in men undergoing sleep studies.
January 2025 in “Skin Pharmacology and Physiology” This study found that alopecia areata patients have elevated oxidative stress markers, such as OSI and MDA, and reduced antioxidant enzyme activities, suggesting a significant role for oxidative stress in the disease and potential value in targeting it therapeutically.
93 citations
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September 2014 in “Diabetes” This study found that male 5αR1 knockout mice and obese Zucker rats treated with finasteride showed increased insulin resistance and hepatic steatosis, potentially implicating 5α-reductase activity in metabolic liver disease development.
13 citations
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January 2017 in “Chemical & Pharmaceutical Bulletin” This study found that a synthetic avicequinone C analogue, 5e, was significantly more potent in inhibiting steroid 5α-reductase type 1 activity in human keratinocytes compared to the original isolated compound.
13 citations
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January 2005 in “Chemical and Pharmaceutical Bulletin” This study reported that newly synthesized progesterone derivatives significantly reduced prostate weight in testosterone-treated hamsters, with 5alpha-reductase inhibitory activity dependent on the size of the substituent at C-17.
January 2023 in “Journal for ReAttach Therapy and Developmental Diversities” In this study, the n-hexane fraction of Carthamus oxyacantha methanolic extract exhibited significant 5α-reductase inhibitory activity in vitro, suggesting potential therapeutic use for benign prostatic hyperplasia through DHT inhibition.
In a laboratory setting, this study reported that the n-butanol fraction of Urtica laetevirens Maxim. water extracts significantly inhibited 5α-reductase activity.
14 citations
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April 2024 in “The Journal of Steroid Biochemistry and Molecular Biology” This study found that epitestosterone, a stereoisomer of testosterone, is metabolized to 5α-dihydroepitestosterone by human 5α-reductase enzymes, which enhances its androgenic activity and reduces its antagonistic effect on testosterone-driven androgen receptor signaling.
January 2010 in “Research and Practice on Chinese Medicines” This study found that coffee extraction and its active compound, caffeotannic acid, showed high enzyme inhibition activity against 5a-reductase in an in vitro model.
11 citations
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January 2000 in “The Journal of Steroid Biochemistry and Molecular Biology” This study found that LY320236 is a competitive inhibitor of type I and a non-competitive inhibitor of type II steroid 5alpha-reductase, indicating its potential as a dual inhibitor with differing modes of activity.