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Hair follicles are complex, dynamic mini-organs that help us understand cell growth, death, migration, and differentiation, as well as tissue regeneration and tumor biology.

Melatonin may benefit skin health and could be a promising treatment in dermatology.

S5αR inhibitors might help treat schizophrenia and other mental disorders but need more research.

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

New drugs for heart disease may be developed from molecules secreted by stem cells.

A circular RNA helps cashmere goat hair cells become hair follicles by blocking a molecule to boost a gene important for hair growth.

Adult esophageal cells can start to become like skin cells, with a key pathway influencing this change.

The document concludes that permanent hair loss conditions are complex, require early specific treatments, and "secondary permanent alopecias" might be a more accurate term than "secondary cicatricial alopecia."

The document concludes that adenosine receptor agonists have potential for treating various conditions, but only a few are approved due to challenges like side effects and the need for selective activation.

Dying cells can help with faster healing and new hair growth by releasing a growth-promoting molecule.

Deleting the PTEN gene in mice causes nerve cells to grow larger and heal better after injury, but may cause overgrowth and hair loss in older mice.

Certain micronutrients may improve hair and nail health, but more research is needed to confirm their benefits.

The document explains how male reproductive hormones work and affect the body.

Reassurance is important for postpartum hair shedding as it likely won't cause complete baldness.

Older skin has higher cancer risk due to inflammation and stem cell issues.

ATP-dependent chromatin remodeling is crucial for skin development and stem cell function.

Different species and human skin models vary in their skin enzyme activities, with pig skin and some models closely matching human skin, useful for safety assessments and understanding the skin's protective roles.

Proper control of β-catenin activity is crucial for development and preventing diseases like cancer.

Fadrozole and finasteride change gene expression related to sex hormones and thyroid hormones in frog larvae development.

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

Using defensins to activate stem cells may improve skin aging signs without causing inflammation.

DA-9401 helps protect rat testis from finasteride damage.

PNKP is essential for keeping adult mouse progenitor cells healthy and growing normally.

Genetic defects in testosterone production can cause hormonal and developmental disorders, and more research is needed to understand androgen regulation and develop safer treatments.

New single-cell analysis techniques are improving our understanding of stem cells and could help in treating diseases.

Twist2 is essential for proper skin healing and hair growth in developing mice.

Exosomes from umbilical cord cells fix hearing loss and damaged ear hair cells in mice.

Twist2 is essential for scarless skin healing and hair growth in mouse fetuses.

Robotic hair transplantation with AI offers more reliable, precise, and efficient hair restoration.

The document concludes that understanding how adult stem and progenitor cells move is crucial for tissue repair and developing cell therapies.