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Glossary Smooth Muscle Cells

Smooth muscle cells are non-striated, involuntary muscle cells found in various tissues throughout the body, including the dermal layer of the skin where hair follicles reside. They play a crucial role in regulating blood flow and the contraction of hair follicles, which can influence hair growth and loss. In the context of hair biology, the contraction of these cells can affect the hair's position and the cycle of hair growth, making them relevant in understanding conditions like alopecia and other hair loss disorders. Key distinguishing characteristics of smooth muscle cells include their spindle-shaped structure and the ability to contract slowly and rhythmically, unlike skeletal muscle cells.

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Research

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research Changes in the Expression of Smooth Muscle Cell–Related Genes in Human Dermal Sheath Cup Cells Associated with the Treatment Outcome of Autologous Cell–Based Therapy for Male and Female Pattern Hair Loss

2 citations , June 2022 in “International Journal of Molecular Sciences”

This study found variable outcomes in hair loss treatment with autologous cell-based therapy using DSC cells, with certain gene markers showing inconsistent correlations with treatment efficacy.

research 0975 Single-cell transcriptomic profiling reveals distinct immunopathogenic programs in alopecia totalis/universalis compared to patchy alopecia areata

July 2026 in “Journal of Investigative Dermatology”

Alopecia totalis/universalis involves more intense immune activity and inflammation than patchy alopecia areata.

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 Isolation of a Novel Population of Multipotent Adult Stem Cells from Human Hair Follicles

344 citations , June 2006 in “American Journal Of Pathology”

Human hair follicles can provide stem cells for regenerative medicine.

research Generation and Characterization of Multipotent Stem Cells from Established Dermal Cultures

58 citations , November 2012 in “PLoS ONE”

This study found that dermal fibroblast cultures, especially those with higher alpha-smooth muscle actin expression, can be used to produce skin-derived precursor cells, unlike human hair follicle dermal papilla cultures.

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community Being Safe on Oral Minoxidil: tl;dr on the literature.

51 upvotes 1 year ago

Oral minoxidil is effective for hair loss but can cause cardiovascular side effects, such as pericardial effusion, especially in those with genetic predispositions. Starting with low doses and monitoring cardiovascular health are advised to reduce risks.

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

6 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 Please explain this Minoxidil phenomena

58 upvotes 2 years ago

The post discusses the difference in effects of Minoxidil (Min) on scalp and facial hair. The user questions why Min-induced hair growth on the scalp is temporary, while facial hair growth seems permanent, even after stopping Min. They propose theories, including different Min mechanisms on body and facial hair, the role of DHT, and the possibility of not achieving fully terminal hair. The responses include personal experiences and theories about Min's effects on hair growth.

community P-1075: a BETTER version of Minoxidil

11 months ago

P-1075 is a more potent hair growth agent than Minoxidil, but it poses significant heart risks, making it unsafe for use. Despite promising results in macaques, concerns about its cardiotoxicity in rats have halted its development.

community Finasteride and “anti-aging” effects

in Treatment 218 upvotes 1 year ago

Finasteride may help users look younger by suppressing DHT, affecting skin and hair. Users also emphasize skincare, sunscreen, and lifestyle for maintaining a youthful appearance.

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Learn

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learn Osteopontin

signaling protein that, when suppressed, may grow hair by reducing inflammation and stem cell loss

learn Beta Polypeptide

learn Minoxidil

An essential vasodilator with some anti-androgenic effects

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