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Memory T cells in the skin balance staying put and moving into the blood, clustering around hair follicles, and increasing in number after infection.

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

Women with PCOS have heart-related issues not because of obesity, but due to insulin resistance and low adiponectin levels.

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.

Humans lost body hair relatively recently in evolution.

Estrogen therapy can reduce skin aging but has cancer risks.

Women with PCOS have a higher risk of diabetes and heart problems, especially when they get older.

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.

About 2.2% of women with symptoms of high male hormones have a mild form of congenital adrenal hyperplasia, and measuring a specific hormone level can accurately diagnose it.

The dermal papilla is crucial for hair growth and health, and understanding it could lead to new hair loss treatments.

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.

Paneth cells help support stem cells and aid tissue regeneration after injury.

Cathepsin L is essential for normal hair growth and development.

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

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

Aging causes skin stem cells to work less effectively.

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

The document concludes that a better understanding of cell changes during wound healing could improve treatments for chronic wounds and other conditions.

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.

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

Protoporphyrin IX is useful in cancer treatment but can cause health problems if not properly regulated.

Sonic hedgehog signaling is crucial for hair growth and maintaining hair follicle identity.

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.

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

Feather patterns in birds are shaped by signaling interactions and cell movements, with EDA/EDAR crucial for pattern formation.

The document concludes that specific cells are essential for hair growth and more research is needed to understand how to maintain their hair-inducing properties.

The conclusion is that PCOS is caused by ovarian sensitivity to hormones and disrupted hormone control, possibly due to ovarian factors, and more research is needed.

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