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Human skin can make serotonin and melatonin, which help protect and maintain it.

Androgens can cause hair growth in some areas and hair loss on the scalp.

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

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

Animals that change color with the seasons mainly do so in response to daylight changes, but climate change is causing camouflage problems that may require evolutionary changes.

Prolactin affects hair growth cycles and can cause early hair follicle regression.

The document concludes that for hair and feather growth, it's better to target the environment around stem cells than the cells themselves.

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

The document concludes that understanding hair and feather regeneration can help develop new regenerative medicine strategies.

Melatonin and mitotane treatment led to hair re-growth in 62% of dogs with Alopecia X, but this was not always linked to normal hormone levels.

Alopecia in captive rhesus macaques is affected by season, sex, age, housing, and stress, with complex links between stress hormones and hair loss.

Hormones during pregnancy and lactation keep skin stem cells inactive, preventing hair growth.

Changing Wnt signaling can lead to more or less hair growth and might help treat hair loss and skin conditions.

Continuous light exposure in rats leads to PCOS-like symptoms and suggests sleep habits might affect the disorder's development.

Researchers found genes that control hair color and growth change before the visible coat color changes in snowshoe hares.

Dogs could be good models for studying human hair growth and hair loss.

Changing light exposure can affect hair growth timing in goats, possibly due to a key gene, CSDC2.

Hair loss in Rhesus macaques may be caused by a skin allergy-related condition.

Male hormones cause different growth in identical human hair follicles due to their unique epigenetic characteristics.

Genes related to pigmentation, body rhythms, and behavior change during hares' seasonal coat color transition, with a common genetic mechanism in two hare species.

Human skin's melanocytes respond to light by changing shape, producing pigments and hormones, which may affect sleep patterns.

The RORα gene is active in different parts of cashmere goat hair follicles and may be influenced by melatonin, especially in December when hair growth changes.

Hair follicles and deer antlers regenerate similarly through stem cells and are influenced by hormones and growth factors.

Hyperadrenocorticism in ferrets is linked to neutering and indoor housing, and is best treated with surgery and a deslorelin implant.

TGF-alpha is present in sheep and ferret skin and may affect hair growth without directly stimulating cell proliferation.

Skin and hair changes in horses can indicate serious diseases, and recognizing these signs is important for treatment and management.

Androgen receptors in the mouse brain may explain cognitive and mood changes in prostate cancer treatment.

Melatonin helps goat hair stem cells grow and maintain their ability to become different cell types.

Melatonin implants did not effectively prevent hair loss in dogs.

Certain genetic markers linked to wool quality in Rambouillet sheep were identified, which can guide better breeding choices.