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Vitamin D and its receptor regulate skin functions like cell growth, immunity, hair cycle, and tumor prevention.

Too much Smad7 changes skin and hair development by breaking down a protein called β-catenin, leading to more oil glands and fewer hair follicles.

The HR protein helps hair grow by blocking a hair growth inhibitor, aiding in hair follicle regeneration.

Hair follicles produce and respond to melatonin, affecting hair growth and sensitivity to estrogen.

Hormones, especially androgens, play a big role in acne, but most acne sufferers don't have a hormone disorder. Hormonal treatments, including birth control pills, can be very effective for women whose acne doesn't improve with regular treatments.

We need more research to better understand human hair follicle stem cells for improved treatments for hair loss and skin cancer.

The document concludes that the hair cycle is a complex process involving growth, regression, and rest phases, regulated by various molecular signals.

Growth factors and cytokines are important for hair growth and could potentially treat hair loss, but more research is needed to overcome challenges before they can be used in treatments.

There are many treatments for permanent hair loss disorders, but their effectiveness varies and there's no clear best option.

The human hair follicle can store topical compounds and be targeted for drug delivery with minimal side effects.

No treatment fully prevents hair loss from chemotherapy yet.

Grafted rodent and human cells can regenerate hair follicles, but efficiency decreases with age.

Finasteride improves hair loss in women with hyperandrogenism.

Prolactin affects hair growth cycles and can cause early hair follicle regression.

The document concludes that understanding the genes and pathways involved in hair growth is crucial for developing treatments for hair diseases.

Minoxidil helps hair growth by activating the β-catenin pathway.

Hair follicle stem cells helped heal a severe scalp burn without needing traditional skin grafts.

Drugs penetrate scalp skin better than abdominal skin, with scalp hair follicles aiding in higher drug delivery.

Hair shedding is an active process that could be targeted to treat hair loss.

Follistatin helps hair growth and cycling, while activin prevents it.

Cetuximab can cause excessive eyelash growth.

Stress hormone corticosterone blocks a growth factor to slow down hair stem cell activity and hair growth.

Human skin cells produce proenkephalin, which changes with environmental factors and skin diseases.

Hormones, especially androgens, play a key role in acne, which can be a symptom of systemic diseases like PCOS and may require targeted treatment.

CCCA is a hair loss type affecting African women, possibly caused by grooming and chemicals, with various treatments and needing more research.

Male hormones are important for hair and oil gland development and can cause conditions like excessive hair growth and acne.

Mice lacking a key DNA methylation enzyme in skin cells have a lower chance of activating stem cells necessary for hair growth, leading to progressive hair loss.

S100A4 and S100A6 proteins may activate stem cells for hair follicle regeneration and could be potential targets for hair loss treatments.

Blocking BMP signaling causes hair loss and disrupts hair growth cycles.

PHBV nanofiber matrices help wounds heal faster when used with hair follicle cells.