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Androgens can both increase and decrease hair growth in different parts of the body.

Chitosan nanofiber scaffolds improve skin healing and are promising for wound treatment.

Stress-related substance P may lead to hair loss and negatively affect hair growth.

Alopecia areata is an autoimmune disease causing patchy hair loss, often with other autoimmune disorders, but its exact causes are unknown.

CRH in the skin acts like the body's stress response system, affecting cell behavior and immune activity.

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

Stress can cause hair loss by negatively affecting hair follicles and this effect might be reversed with specific treatments.

TRP channels in the skin are important for sensation and health, and targeting them could help treat skin disorders.

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

Modern lifestyles, including poor diet, stress, and long-term use of certain medications, hinder the body's ability to heal from inflammation, leading to chronic diseases.

Men, especially older ones with health issues like prostate cancer, may have worse COVID-19 outcomes and could benefit from therapies targeting male hormones.

Folliculitis decalvans is a rare scalp condition causing scarring hair loss, treated with long-term antibiotics and other medications, but it often comes back and is hard to manage.

Stress increases a factor in mice that leads to hair loss, and blocking this factor may prevent it.

The document concludes that hair is complex, with a detailed growth cycle, structure, and clinical importance, affecting various scientific and medical fields.

Alopecia areata is caused by immune system attacks on hair follicles, often triggered by viral infections.

Skin surface lipids are important for skin health and altering them could help prevent aging and treat skin conditions.

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

FOXO1 is important for wound healing, but its dysfunction in diabetes can slow the healing process.

Mammals might fail to regenerate not because they lack the right cells, but because of how cells respond to their surroundings, and changing this environment could enhance regeneration.

Animal models have helped understand hair loss from alopecia areata and find new treatments.

Fat tissue cells are a promising option for healing various diseases, but more research is needed to ensure they are safe and effective.

Advanced human skin models improve drug development and could replace animal testing.

Beta-caryophyllene helps improve wound healing in mice, especially in females.

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

Children with atopic dermatitis often have sleep problems due to itching and may benefit from melatonin, which helps with sleep and skin symptoms.

Nanoparticles can enter the skin, potentially causing toxicity, especially in damaged skin.

Lymphocytes, especially CD8+ T cells, play a key role in causing alopecia areata, and targeting them may lead to new treatments.

Using CRISPR for gene editing in the body is promising but needs better delivery methods to be more efficient and specific.

Understanding how hair follicle stem cells work can help find new ways to prevent hair loss and promote hair growth.

Environmental factors at different levels control hair stem cell activity, which could lead to new hair growth and alopecia treatments.