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

Understanding hair growth involves complex interactions between molecules and could help treat hair disorders.

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

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.

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.

Androgens block hair growth by disrupting cell signals; targeting GSK-3 may help treat hair loss.

The circadian clock is crucial for tissue renewal and regeneration, affecting stem cell functions and having implications for health and disease.

Circadian rhythms are crucial for stem cell function and tissue repair, and understanding them may improve aging and regeneration treatments.

Skin development in mammals is controlled by key proteins and signals from underlying cells, involving stem cells for maintenance and repair.

The TGF-β family helps control how cells change and move, affecting skin, hair, and organ development.

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

LGR5 helps maintain corneal cell characteristics and prevents unwanted changes by controlling specific cell signaling pathways.

mTOR signaling helps activate hair stem cells by balancing out the suppression caused by BMP during hair growth.

Topical drugs and near-infrared light therapy show potential for treating alopecia.

Cyclosporine A may help treat hair loss by blocking a protein that inhibits hair growth.

Sox2-positive dermal papilla cells have unique characteristics and contribute more to skin and hair follicle formation than Sox2-negative cells.

Hedgehog signaling helps keep hair follicle stem cells the same in both young and old human skin.

Hair growth is influenced by interactions between skin layers, growth factors, and hormones, but the exact mechanisms are not fully understood.

Graft-versus-host disease is a complication where donor immune cells attack the recipient's body, often affecting the skin, liver, and gastrointestinal tract.

Photothermal hydrogels are promising for infection control and tissue repair, and combining them with other treatments could improve results and lower costs.

Skin stem cells maintain and repair the outer layer of skin, with some types being essential for healing wounds.

Hair can regrow after certain stem cells are lost because other stem cells can take over their role.

miR-22, a type of microRNA, controls hair growth and its overproduction can cause hair loss, while its absence can speed up hair growth.

Glutamine metabolism affects hair stem cell maintenance and their ability to change back to stem cells.

Exosomes can improve skin health and offer new treatments for skin repair and rejuvenation.

A new mutation in the STING protein causes a range of symptoms and its severity may be affected by other genetic variations; treatment with a specific inhibitor showed improvement in one patient.

Androgens prevent hair growth by changing Wnt signals in cells.

Injecting a special gel with human protein particles can help hair grow.

Modified rat stem cells on a special scaffold improved blood vessel formation and wound healing in skin substitutes.