August 2025 in “ACS Omega” This study synthesized and evaluated hydroxycinnamate derivatives for their ability to inhibit human SRD5A1, finding that three compounds showed significant inhibitory activity and low cytotoxicity. Compound 10a notably reduced SRD5A1 protein expression in cells, suggesting potential for nonsteroidal treatment of androgen-related conditions.
This study found that teak leaf extract can be effective in promoting hair growth in males with androgenic alopecia; however, significant variability in steroid 5-alpha reductase inhibitory activity among samples from different geographic origins means quality control is important for consistent therapeutic potential.
51 citations
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May 2011 in “Phytotherapy Research” This study suggests that red ginseng rhizome extracts, particularly ginsenoside Ro, may promote hair re-growth in an androgenetic alopecia model due to their inhibitory activity on testosterone 5α-reductase.
August 2025 in “OPAL (Open@LaTrobe) (La Trobe University)” This study found that hydroxycinnamate derivatives, especially a compound named 10a, effectively inhibited SRD5A1 activity and protein expression in cell assays, suggesting potential for treating androgen-related conditions.
35 citations
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July 2010 in “The FEBS journal” In this study, researchers identified a highly reactive, isozyme-specific sequence for TGase 3, contributing to understanding its distinct functional role and activity distribution in the mouse epidermis.
7 citations
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September 1991 in “Journal of Andrology” In this study, 4‐MAPC treatment reduced ventral prostate weight in rats primarily through decreased synthetic activity, with testosterone propionate increasing prostate weight and activity at pharmacologic doses.
This study observed that in a real-world clinical setting in Greece, belimumab effectively controlled disease activity in lupus patients and allowed for a reduction in glucocorticoid dosage, with more pronounced benefits seen in patients who were serologically active at the start of treatment.
February 2026 in “Journal of Sylva Indonesiana” This study found that the heartwood extract of Avicennia marina demonstrated strong antioxidant activity, with an IC50 value of 61.50 µg/mL, suggesting potential for development into supplements or topical applications targeting degenerative diseases related to oxidative stress.
July 2022 in “Journal of Investigative Dermatology” This study found that Substance P increased mitochondrial activity and biogenesis markers in cultured human scalp hair follicles, suggesting a novel link between stress-related neuropeptide signaling and hair follicle mitochondrial responses.
196 citations
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May 2001 in “The journal of investigative dermatology/Journal of investigative dermatology” This study found that SZ95 sebocytes and HaCaT keratinocytes exhibit distinct enzyme expressions and activities, implicating their different roles in androgen metabolism and homeostasis in vitro.
20 citations
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January 2003 in “Chemical and Pharmaceutical Bulletin” This study reports that five new progesterone derivatives demonstrated inhibitory activity against the 5α-reductase enzyme and binding affinity for the androgen receptor in an in vitro hamster model.
35 citations
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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.
18 citations
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November 2020 in “Frontiers in Cell and Developmental Biology” This review discusses how inflammation influences hair follicle stem cell activities like wound healing and follicle cycling and suggests a potential link between inflammation, stem cell activation, and programmed cell death.
July 2025 in “Journal of Investigative Dermatology” Miniaturized hair follicles in androgenetic alopecia show abnormal mitochondrial activity and damage.
38 citations
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June 2018 in “Archives of Toxicology” This review suggests that skin may largely protect itself from CYP-generated reactive metabolites due to higher conjugating enzyme activities, while highlighting limitations in modeling human skin metabolism experimentally.
193 citations
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August 1985 in “Endocrinology” This study found significant species differences in the enzyme activity and inhibitor affinities of prostatic 5α-reductases from rats, dogs, and humans, with variable potencies for different 3-oxo-4-azasteroid inhibitors across species.
46 citations
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September 2014 in “Steroids” This review suggests that brassinosteroids may have similar biological activities in both plants and other organisms, prompting further exploration of steroid regulation mechanisms across different life forms.
December 2025 in “Sains Medisina” This review identified 12 herbal plants producing essential oils with pharmacological activities that stimulate hair growth, potentially through enhanced scalp microcirculation, inhibition of 5α-reductase, anti-inflammatory and antioxidant effects, anagen phase stimulation, and increased dermal papilla cell proliferation.
January 2004 in “Online Publication Service of Würzburg University (Würzburg University)” This study found that women with PCOS displayed significantly higher activity of 5alpha-reductase, suggesting an additional role for liver and peripheral tissues in their androgen excess.
January 2004 in “Online Publication Service of Würzburg University (Würzburg University)” This study found that women with PCOS have higher activity of the enzyme 5alpha-reductase, which may contribute to their elevated androgen levels.
April 2026 in “Health care of Tajikistan” This study found that patients with alopecia areata receiving combined therapy showed a significant reduction in proinflammatory cytokines and circulating immune complexes, along with increased IL-10 levels and phagocytic activity, suggesting an immunomodulatory effect that reduces inflammation and restores immune balance.
December 2023 in “International journal of molecular sciences” This in vitro study found sex chromosome differences affect steroidogenic enzyme activity and androgen receptor expression in human skeletal muscle cells, showing varied responses to testosterone exposure between 46XY and 46XX cells.
November 2021 in “Pharmaceutical Sciences” This study found that the compound androstane-17-carboxamide 6 may serve as a lead for new drugs to treat BPH and prostate cancer by reducing the weight of androgen-dependent glands.
December 2016 in “University of Birmingham Institutional Research Archive (University of Birmingham)” This study found that manipulating 5αR2 activity in human hepatocytes in vitro can regulate lipogenesis, with potential clinical implications for patients taking 5αR inhibitors.
57 citations
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May 1986 in “Clinics in endocrinology and metabolism” This review found that women with idiopathic hirsutism may have increased 5α-reductase activity, as indicated by elevated levels of a dihydrotestosterone-reduced metabolite, but more research is needed to confirm its clinical relevance as a biomarker.
17 citations
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December 2015 in “BMC Complementary and Alternative Medicine” This study found that Avicennia marina extract significantly inhibited 5α-reductase type 1 activity in human hair dermal papilla cells, suggesting its potential use for treating androgenic alopecia.
16 citations
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March 2022 in “Clinica Chimica Acta” This study suggests that women with idiopathic hirsutism have increased 5α-reductase activity, indicated by elevated levels of 3α-diol glucuronide; further research is needed to assess its clinical biomarker potential.
4 citations
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April 2001 in “Experimental Dermatology” This study used a novel HPLC-radiomatic flow scintillation system to measure 5α-reductase activity in dermal papillae from miniaturized hair follicles of the human occipital scalp, revealing significant variability in enzyme activity across samples.
February 2021 in “International Journal of Science and Research (IJSR)” This study found that the total testosterone/dihydrotestosterone ratio is significantly higher in women with polycystic ovary syndrome and is associated with a worse metabolic profile in both PCOS and healthy women.
2 citations
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September 2017 in “Archives of Medical Science” The researchers reported that finasteride treatment in male rats may lead to changes in antioxidant enzyme activity in their offspring's epididymis, potentially affecting sperm maturation.