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Glossary Alpha-smooth muscle actin

protein involved in smooth muscle contraction and wound healing

Alpha-smooth muscle actin (α-SMA) is a protein that plays a crucial role in the contraction of smooth muscle cells, which are found in various tissues like blood vessels and the digestive tract. It is also a marker used by scientists to identify myofibroblasts, cells involved in wound healing and tissue repair. Elevated levels of α-SMA can indicate tissue remodeling or fibrosis, which is the thickening and scarring of connective tissue.

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research Formation of actin mesh structures and alpha-smooth muscle actin dynamics in fibroblasts contribute to dermal regeneration in mouse fetus

1 citations , September 2025 in “PLoS ONE”

This study observed that in mouse fetuses, reticular contraction by actomyosin is involved in dermal regeneration, and differences in actin and α-SMA localization may determine the switch between regeneration and scar formation, suggesting potential insights for wound regeneration therapy.

research Alpha Smooth Muscle Actin role in Androgenetic Alopecia Pathogenesis:

November 2024 in “Benha Journal of Applied Sciences”

In this study, the researchers explored how the loss of structural integrity in hair follicles due to reduced α-SMA expression in the vertex area may contribute to androgenetic alopecia.

research Human hair follicle stem cell differentiation into contractile smooth muscle cells is induced by transforming growth factor-β1 and platelet-derived growth factor BB

19 citations , September 2013 in “Molecular Medicine Reports”

In this study, researchers developed a method to efficiently derive contractile smooth muscle cells from human hair follicle stem cells using TGF-β1 and PDGF-BB, which may advance vascular tissue engineering.

research The action of diazoxide and minoxidil sulphate on rat blood vessels: a comparison with cromakalim

86 citations , July 1990 in “British Journal of Pharmacology”

Diazoxide, minoxidil sulphate, and cromakalim relax rat blood vessels by opening K+ channels, with some differences in their actions.

research Hair Follicle Biology and Topical Minoxidil: Possible Mechanisms of Action

37 citations , October 2009 in “Dermatology”

This study suggests that the action of minoxidil in stimulating hair growth likely occurs at the follicular dermal papilla, though it does not induce new follicle formation.

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community Oral Minoxidil - The Hyper-Responder Concept

4 upvotes 10 months ago

Minoxidil's effectiveness varies due to genetic differences in the SULT1A1 enzyme, affecting how well it converts to its active form, minoxidil sulfate. Hyper-responders may experience rapid hair growth and increased side effects, such as pericardial effusion, even at low doses.

community Pelage PP405: New Hair Growth from Inactive Follicular Units - Phase 2a results at AAD 2026

1080 upvotes 5 months ago

PP405, a topical treatment, shows promise for hair growth by activating inactive follicles, with 66% of participants experiencing positive results. The treatment is well-tolerated and may proceed directly to Phase 3 trials, offering a potential alternative to minoxidil and finasteride.

community I Guess balding is cured so should we close subreddit and move to hairstyling photos 😁 Botox-like nerve blocking reveals potential way to fully regenerate skin without scarring

5 months ago

Baldness is difficult to cure because current treatments like finasteride, dutasteride, and minoxidil only prevent hair shedding, and new developments are mostly ineffective. Botox shows potential in aiding skin regeneration and hair growth, but maintenance therapy with treatments like dutasteride and minoxidil may still be necessary.

community Finasteride Doubled my Total & Free Test but also my Estradiol - 8 months in

in Chat 32 upvotes 1 month ago

A 22-year-old male experienced increased testosterone and estradiol levels after 8 months on finasteride, leading to softer erections and reduced arousal. Suggestions included reducing finasteride dosage, using supplements like L-arginine, L-citrulline, zinc, and possibly tadalafil to improve symptoms.

community DHT Isn't (Directly) Important

101 upvotes 1 year ago

Finasteride's potential side effects, especially sexual dysfunction, are discussed, with emphasis on hormonal balance between testosterone and estradiol. Users share experiences with finasteride, minoxidil, and dutasteride, highlighting the variability in side effects and the influence of mindset and lifestyle.

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