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Glossary Androgen Receptor Gene

encodes a protein that binds male hormones like testosterone

The Androgen Receptor Gene (AR Gene) is a gene located on the X chromosome that encodes the androgen receptor, a protein that binds to androgens, which are male hormones like testosterone. This receptor plays a crucial role in the development and maintenance of male characteristics, and mutations in the AR gene can lead to conditions such as androgen insensitivity syndrome and contribute to hair loss disorders like androgenetic alopecia.

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Research

5 / 1000+ results

research Androgen receptor gene CAG repeat polymorphism in women with polycystic ovary syndrome

44 citations , January 2008 in “Fertility and Sterility”

This study suggests that androgen receptor gene CAG repeat length may influence serum free testosterone levels in some PCOS patients, with longer repeats associated with higher testosterone concentrations.

research Androgen receptor gene polymorphisms and risk for androgenetic alopecia: a meta-analysis

41 citations , October 2011 in “Clinical and Experimental Dermatology”

This meta-analysis suggests that the G allele of AR StuI polymorphism might be a potential risk factor for AGA, particularly in white populations.

research No Evidence that 2D:4D is Related to the Number of CAG Repeats in the Androgen Receptor Gene

40 citations , January 2013 in “Frontiers in Endocrinology”

Finger length ratios are not linked to the number of specific gene repeats affecting testosterone sensitivity.

research Polymorphisms in androgen and estrogen receptor genes: effects on male aging

12 citations , October 2004 in “Experimental Gerontology”

This review summarizes how common polymorphisms in androgen and estrogen receptor genes may influence aging-related symptoms and diseases in men, but it reports no new clinical results.

research Interaction between estrogens and androgen receptor genes microsatellites, prostate-specific antigen and androgen receptor expressions in breast cancer

6 citations , January 2010 in “Neoplasma”

In this study, researchers found that shorter CA repeats in the ERbeta gene are correlated with PSA expression, and PSA immunoexpression is associated with increased disease-free survival in breast cancer.

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Community Join

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community Having androgen receptor density and sensitivity at wrong f*ing place

in Satire 7 upvotes 1 year ago

The conversation discusses hair loss treatments, focusing on the use of topical minoxidil, microneedling, finasteride, and dutasteride, while debating the role of testosterone and DHT in hair loss. It also touches on the potential liver health impacts of these treatments and the genetic sensitivity of hair follicles to androgens.

community Fun thought experiment about halting hair loss permamently

59 upvotes 2 years ago

A user proposed genetically engineering scalp stem cells to stop androgen receptors from causing hair loss. Others discussed the feasibility, existing research, and potential issues with this approach, including targeting the correct cells and unintended effects.

community Is there a topical androgen receptor blocker so we don't have to fuck with the enzyme and destroy our allopregnanolone, but go and hit the end target straight?

in Treatment 44 upvotes 2 years ago

The conversation discusses topical androgen receptor blockers for hair loss, mentioning Clascoterone, Pyrilutamide, GT20029, and RU58841. Ketoconazole's effectiveness and application methods are also debated.

community What is preventing GT20029 from being the cure to androgenetic hair loss?

10 upvotes 1 year ago

GT20029 is discussed as a potential treatment for androgenetic hair loss by targeting androgen receptors, unlike finasteride which reduces DHT broadly. Concerns include its effectiveness, genetic variations in androgen receptors, and availability, with some skepticism about its potential as a true alternative.

community Has anyone powered through the creatine shedding (via increased androgen receptor sensitivity) and stabilized?

9 upvotes 1 year ago

Creatine may cause increased hair shedding due to androgen receptor sensitivity, despite limited evidence. The user is using dutasteride and minoxidil and seeks advice on whether shedding will stabilize, with suggestions including GHK-Cu and RU58841.

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Learn

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learn Cyproterone

a synthetic anti-androgen and weak progestogen that inhibits DHT binding to androgen receptor

learn Spironolactone

Blood-pressure and diuretic drug with anti-androgen effects

learn Neem Oil

Oil from the neem tree, used in traditional remedies

learn GT20029

Experimental topical drug designed to break down androgen receptors

What is GT20029 and how does it work as a topical anti-androgen for hair loss? GT20029 is an investigational topical androgen-receptor degrader. One 12-week Phase II trial in 180 Chinese men found two of four regimens beat placebo on hair count; it is not approved or available.

learn Clascoterone

Topical androgen-receptor blocker, approved as an acne cream

What is clascoterone and how does it work against hair loss? Clascoterone blocks androgen receptors in the skin. It is approved only for acne; a scalp solution is still investigational for hair loss.

learn Fluridil

How is Fluridil different from other DHT blockers like finasteride? Fluridil is a topical androgen-receptor blocker applied to the scalp, while finasteride is an oral 5-alpha-reductase inhibitor that lowers DHT throughout the body. Finasteride is FDA-approved and far better studied; Fluridil rests on one 43-man trial and is not licensed as a hair-loss medicine, so its long-term safety and effect size are unknown.

learn Bicalutamide

Can bicalutamide stop DHT from shrinking your hair follicles? Bicalutamide blocks androgens at the receptor rather than lowering DHT, and some dermatologists prescribe it off-label for women with pattern hair loss, although its US label says it should not be used in women. The one randomised trial (74 women, 2025) found it added no benefit to oral minoxidil, and the drug needs liver monitoring because its label warns of severe and fatal liver injury; it is contraindicated in pregnancy.

learn KX-826

Kintor Pharmaceutical: KX-826, a New Name in Hair Loss Research KX-826 (pyrilutamide) is an experimental topical androgen receptor blocker from Kintor Pharmaceutical and is not approved as a medicine anywhere. Its first China Phase III trial did not beat placebo; the company reported in March 2026 that a later Phase III of a 1.0% formulation met its primary endpoint, but these results are company announcements, not peer-reviewed, and long-term safety is unknown.

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Clinics

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Experts

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Hair System Specialist
Jane Genesi
Marlton, PA, United States

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Jane Genesi