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

Dermatoscopy and videodermatoscopy are useful for diagnosing and monitoring various skin, hair, and nail conditions.

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

Accurate diagnosis and effective oral treatment are key to managing tinea capitis and preventing its spread.

TGF-β is crucial for controlling stem cell behavior and changes in its signaling can lead to diseases like cancer.

Lichen planus is a skin condition that can resolve on its own, is linked to hepatitis C, and increases the risk of skin cancer.

Male and female skin differ due to hormones, affecting conditions like hair loss, acne, and skin cancer, and suggesting a need for gender-specific treatments.

Laser hair removal effectiveness depends on targeting hair structures without harming the skin, and improvements require more research and expert collaboration.

The document concludes that more research is needed to better understand and treat primary cicatricial alopecias, and suggests a possible reclassification based on molecular pathways.

Pig skin is a good substitute for human skin to measure drug absorption, but differences in skin structure and enzymes across species must be considered.

Cancer cells often have more copies of TERT and TERC genes, which helps them grow and could affect patient outcomes.

Androgens, like testosterone, are crucial for early testicular descent in rats.

Some viruses can cause cancer by changing cell processes and avoiding the immune system; vaccines and targeted treatments help reduce these cancers.

Taxane chemotherapy can cause skin, hair, and nail side effects, which are often under-reported and can affect patient quality of life.

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

Memory regulatory T cells need IL-7, not IL-2, to stay in peripheral tissues.

Male hormones affect COVID-19 severity and certain drugs targeting these hormones could help reduce the risk.

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.

Eating less sugar, milk, and saturated fats and more vegetables and fish may help treat and prevent acne.

Estrogen replacement can improve skin health in menopausal women but doesn't reverse sun damage or prevent hair loss.

Estrogen loss during menopause worsens skin health, but hormone replacement therapy may improve it, though more research is needed.

Nanoparticles can improve skin drug delivery but have challenges like toxicity and stability that need more research.

The skin's internal clock affects healing, cancer risk, aging, immunity, and hair growth, and disruptions can harm skin health.

Minoxidil shortens baldness from chemotherapy by 50.2 days without significant side effects.

Foxp3 is crucial for regulatory T cell function, and targeting these cells may help treat immune disorders.

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

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

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.

Potassium channel openers are effective in treating heart conditions, high blood pressure, pulmonary diseases, bladder issues, and hair loss, but more selective drugs are needed.

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.