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Keratinocytes help heal skin wounds by interacting with immune cells and producing substances that kill pathogens.

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 Sonic hedgehog pathway is crucial for new hair growth during mouse skin healing.

Skin aging is due to impaired stem cell mobilization or fewer responsive stem cells.

Pregnancy can cause skin darkening, varicose veins, more sweating, hair growth, hair loss after birth, nail changes, and gum inflammation.

Microneedles improve drug delivery in various body parts, are safe and painless, and show promise in cosmetology, vaccination, insulin delivery, and other medical applications.

Periodontal ligament stem cells show promise for regrowing tissues but require more research for safe, effective use.

Some vitamins and minerals like vitamin D and iron can help with certain types of hair loss, but more research is needed for others.

Low oxygen conditions increase the hair-growing effects of substances from fat-derived stem cells by boosting growth factor release.

Different types of stem cells and their environments are key to skin repair and maintenance.

Modulating BMP activity changes the number, size, shape, and type of ectodermal organs.

Obesity is linked to various skin problems and may increase the risk of skin cancer.

Low doses of some substances can be beneficial, while high doses can be harmful or toxic.

Fat cells in the skin help start healing and form important repair cells after injury.

Stem cell plasticity is crucial for wound healing but can also contribute to cancer development.

Targeting androgen receptors could be a promising way to treat skin disorders with fewer side effects.

Minoxidil can help grow hair in mice by making cells grow and improving hair quality. More research needed.

The telogen phase of hair growth is active and important for preparing hair follicles for regeneration, not just a resting stage.

The hydrogel with a 1:3 ratio of hydroxyethyl cellulose to hyaluronic acid is effective for delivering drugs through the skin to treat acne.

Macrophages help regrow hair by activating stem cells using AKT/β-catenin and TNF.

Hair grows faster in the morning and is more vulnerable to damage from radiation due to the internal clock in hair follicle cells.

Some drugs can cause skin, nail, and hair problems, which are important for healthcare professionals to recognize and report.

Platelet-rich plasma may help with hair growth and skin quality but more research is needed to confirm its effectiveness.

Treating psoriasis on the scalp, nails, and skin folds is challenging, often requiring systemic treatments for severe cases, with some success in topical and biologic treatments.

The Protein-Sparing Modified Fast is effective for rapid weight loss and maintaining it, but requires medical supervision and can have side effects.

COVID-19 can cause skin issues like rashes and "COVID toes," and people with skin conditions should adjust their treatments if they get the virus.

Eating the right nutrients can improve hair health, but taking extra supplements usually doesn't help unless you have a deficiency.

The document concludes that adult mammalian skin contains multiple stem cell populations with specific markers, important for understanding skin regeneration and related conditions.

New nanocomposites with copper show promise for healing burn wounds and regenerating skin.

Newborn mouse skin cells can grow hair and this process can be recreated in adult cells to potentially help with hair loss.