This study found that testosterone enhances glucose-stimulated insulin secretion in male and female human islets through its conversion to DHT and E2, a process disrupted by 5α-reductase and aromatase inhibitors.
This study found that testosterone enhances glucose-stimulated insulin secretion in male and female human islets, requiring conversion to DHT and E2 via SRD5A1 and aromatase.
February 2016 in “PubMed” This review discusses testosterone replacement therapy, highlighting that most studies report no increased myocardial infarction risk when the therapy is properly administered with controlled hormone levels; it calls for careful consideration despite insurance coverage challenges.
In this study, oral testosterone administered three times daily normalized serum testosterone levels in men with experimentally induced hypogonadism over nine days and significantly reduced SHBG.
January 2005 in “Journal of Investigative Medicine” This study found that testosterone therapy improved physical performance, strength, lean body mass, and serum cholesterol in older men with low testosterone levels, with or without the addition of finasteride.
3 citations
,
December 2000 in “International Journal of Cosmetic Science” This study established that a human epidermal model can be utilized to assess 5alpha-reductase activity and evaluate enzyme modulators, such as finasteride, for dermatological applications.
1 citations
,
October 2025 in “EBioMedicine” Women have a higher DHT/testosterone ratio than men, possibly due to gut bacteria activity.
124 citations
,
March 2012 in “JAMA” This abstract discusses the unclear role of dihydrotestosterone (DHT) in postembryonic life in marsupials and possibly humans, reporting no new findings.
58 citations
,
January 2006 in “Skin Pharmacology and Physiology” This study found that testosterone and 5α-dihydrotestosterone induced apoptosis in dermal papilla cells from nonbalding scalp regions, suggesting a high androgen stimulus can trigger cell death related to androgenetic alopecia.
45 citations
,
January 2012 in “The Journal of Steroid Biochemistry and Molecular Biology” This study found that overexpression of AKR1C3 in prostate cancer cells redirected androgen metabolism towards testosterone production, which facilitated cell proliferation, potentially reducing the effectiveness of finasteride treatment.
23 citations
,
March 2014 in “International Journal of Molecular Sciences” The study observed that testosterone reduced knee range of motion in ovariectomized female rats, potentially by downregulating specific relaxin receptor isoforms, with its effects mediated via dihydro-testosterone.
16 citations
,
January 2019 in “Pharmaceutical biology” This study found that Lespedeza cuneata aqueous extract reduced serum dihydrotestosterone levels and 5α-reductase mRNA expression in testosterone-induced prostatic hyperplasia in rats, suggesting potential as a treatment for prostatic hyperplasia.
14 citations
,
November 1982 in “British Journal of Dermatology” This article discusses whether testosterone's metabolism to 5α-dihydrotestosterone is necessary for androgenic effects in the skin but reports no new experimental results.
13 citations
,
July 2018 in “General and comparative endocrinology” This study observed that direct exposure to androgens in Western clawed frogs differentially affects thyroid receptor and deiodinase gene expression in male and female tissues, offering insight into sex-specific metabolic pathway activation.
12 citations
,
March 2017 in “Arteriosclerosis, thrombosis, and vascular biology” This study in male mice found that testosterone provides strong protection against skin necrosis after ischemia, working through its estrogenic and androgenic derivatives to enhance skin survival and revascularization, with 17β-estradiol being notably more effective than dihydrotestosterone.
10 citations
,
June 1998 in “PubMed” Finasteride significantly reduces DHT levels in male dogs without affecting testosterone levels, suggesting it could be used to treat benign prostatic hypertrophy in dogs weighing 10 to 50 kilograms.
8 citations
,
February 2014 in “General and Comparative Endocrinology” In this study, exposure to the drug finasteride in Silurana tropicalis significantly increased testosterone levels in liver and testis tissues and altered gene expression related to male reproduction and oxidative stress.
7 citations
,
April 2023 in “Biomedicines” This study found that sex hormones, specifically non-aromatizable androgens like DHT and A/T, significantly increase inflammatory cytokine expression in human adipocytes when stimulated by LPS.
5 citations
,
January 2017 in “Endocrinology” This chapter reviews the biosynthesis, mechanism of action, and therapeutic effects of testosterone and related androgens, but reports no new research findings.
3 citations
,
November 2021 in “IntechOpen eBooks” This chapter reviews the role of the testes in producing and functioning of testicular androgens and protein hormones, but it presents no new clinical results.
2 citations
,
September 1971 in “Metabolism, clinical and experimental” In this study, patients with testicular feminization syndrome showed limited anabolic responsiveness to dihydrotestosterone, potentially due to reduced affinity of nuclear receptor sites for androgenic steroids rather than defective testosterone conversion.
1 citations
,
June 2021 in “Singapore Medical Journal” This study suggests that type I 5-alpha reductase may also play a role in hair growth, with dutasteride potentially being more potent than finasteride in modulating key hair growth gene expressions.
August 2018 in “Brock University Digital Repository (Brock University)” This study suggests that the elevated stress hormone response in adolescent male rats may involve increased conversion of testosterone to estradiol at the adrenal cortex level.
104 citations
,
March 2014 in “The Journal of clinical endocrinology and metabolism/Journal of clinical endocrinology & metabolism” In this study, DHT and calculated free DHT were linked to higher risks of incident cardiovascular disease and all-cause mortality in elderly men, while total testosterone and calculated free testosterone showed no such associations.
70 citations
,
April 2014 in “Annales d'endocrinologie” This review discusses the pathways of androgen biosynthesis and reports no new findings, highlighting the need to understand the interplay between the classic and backdoor pathways.
57 citations
,
January 1986 in “The Prostate” This article discusses the role of dihydrotestosterone in human prostatic adenocarcinoma growth and suggests that 6-methyleneprogesterone could be used to inhibit DHT for treating hormone-responsive prostate cancer, without new clinical findings.
36 citations
,
October 2009 in “Journal of Investigative Dermatology” This study suggests that in SZ95 sebocytes, a pathway for DHT biosynthesis does not require testosterone as an intermediate, potentially impacting the treatment of androgen-sensitive skin conditions.
8 citations
,
September 2017 in “Journal of Natural Medicines” This study reported that the n-butanol fraction of Perilla frutescens extract, particularly rosmarinic acid, showed potential for hair regrowth and anti-androgenic activity in male mice, suggesting it as a possible treatment for androgenetic alopecia.
8 citations
,
July 2017 in “The Journal of Steroid Biochemistry and Molecular Biology” This study suggests that in gilthead seabream, DHT is involved in the onset of the meiotic phase of spermatogenesis and influences serum levels of E2 through regulation of aromatase activity.
August 2023 in “Malaysian Journal of Medicine and Health Sciences/Malaysian journal of medicine and health sciences” This study found that aqueous extract of Pueraria mirifica, when administered to a rat model, significantly reduced prostate weight, prostatic index, and serum dihydrotestosterone levels, while also improving prostate histomorphology, suggesting its potential as an anti-BPH treatment.