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Hair and nail cells share similar proteins, indicating a common differentiation pathway.

The skin has a complex immune system that is essential for protection and healing, requiring more research for better wound treatment.

The circadian clock affects skin stem cell behavior, impacting aging and cancer risk.

New nanofiber technology improves wound healing by supporting cell growth and delivering treatments directly to the wound.

Apoptosis is essential for human skin development and forming a functional epidermis.

Hair loss and aging are caused by the breakdown of a key protein in hair stem cells.

Tiny pollution particles called PM2.5 can harm skin cells by causing stress, damage to cell parts, and cell death.

Skin needs dermal β-catenin activity for hair growth and skin cell multiplication.

Skin cells produce and activate vitamin D, which regulates skin functions and supports hair growth.

Alopecia areata involves immune activation in the scalp, suggesting treatments targeting TH1, TH2, and IL-23 pathways.

Capsaicin, found in chili peppers, can slow down hair growth by affecting skin cells and hair follicles.

Wnt ligands are crucial for hair growth and repair.

Estrogens significantly influence hair growth by interacting with receptors in hair follicles and may help regulate the hair growth cycle.

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

Tight junctions are key for skin protection and controlling what gets absorbed or passes through the skin.

The document concludes that accurate diagnosis of ichthyosis is crucial for treatment and genetic advice, and ongoing research is needed for better therapies.

Cathepsin L is essential for normal hair growth and development.

Targeting the IL-23/IL-17 pathway effectively treats several inflammatory skin diseases.

Liposomes improve drug delivery and reduce skin irritation in dermatology.

Vitamin D is important for skin health and may affect conditions like psoriasis and hair loss, but more research is needed to understand its role fully.

Matriptase is crucial for keeping epithelial tissues healthy and functioning properly.

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

Antibiotics can reduce acne but may lead to resistant bacteria, and understanding the skin's bacteria is important for treatment.

Damage to skin releases dsRNA, which activates TLR3 and helps in skin and hair follicle regeneration.

Janus kinase inhibitors are promising treatments for autoimmune skin diseases like eczema and psoriasis.

Understanding how cells die in the skin is important for treating skin diseases and preventing hair loss.

Vitamin D has potential benefits for cancer prevention, heart health, diabetes, obesity, muscle function, skin health, and immune function, but clinical results are mixed and more research is needed.

The document concludes that while significant progress has been made in understanding skin biology and stem cells, more research is needed to fully understand their interactions with their environment.

Children with atopic dermatitis often have sleep problems, affecting their growth and behavior.

Overexpressing Dsg3 in mice skin causes excessive cell growth and abnormal skin development.