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The article concludes that the wool follicle is a valuable model for studying tissue interactions and has potential for genetic improvements in wool production.

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.

Finasteride lowers risk of urinary issues and surgery by over 50% in 4 years.

Finasteride doesn't harm male fertility or sperm quality, but may slightly reduce ejaculate volume.

Pure carbon nanotubes are safe for mice, but impure ones cause immune issues and hair loss.

5α-reductase is essential for male sexual development and its inhibitors have potential in treating various conditions related to hormone action.

Medications have become the main treatment for enlarged prostate symptoms, replacing surgery and watchful waiting.

The Wnt/β-catenin pathway helps tissue regeneration but can also cause fibrosis, and drugs that inhibit this pathway may aid in healing skin and heart tissues.

A new mutation in the human glucocorticoid receptor reduces its function and causes resistance to glucocorticoids.

The Wnt/β-catenin pathway is important for tissue development and has potential in regenerative medicine, but requires more research for therapeutic use.

The EDAR gene greatly affects hair thickness in Asian populations.

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

TNF family proteins are crucial for the development of skin features like hair, teeth, and mammary glands.

The conclusion is that tissue structure is key for stem cell communication and maintaining healthy tissues.

Skin has specialized touch receptors that can tell different sensations apart.

Despite progress, better treatments and understanding are needed for the high rates of long-term issues and deaths linked to eating disorders.

Testosterone therapy seems safe for postmenopausal women for a few years, but more research is needed for long-term effects.

Aromatase gene variation may increase female hair loss risk.

5α-reductase inhibitors can cause sexual problems, higher risk of aggressive prostate cancer, and depression.

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

Progress has been made in skin and nerve regeneration, but more research is needed to improve methods and ensure safety.

5-alpha reductase inhibitors can cause sexual side effects like erectile dysfunction and reduced sexual desire, sometimes lasting after stopping the drug.

Finasteride slowly binds to 5-alpha-reductase, affecting enzyme stability and inhibitor potency.

European guidelines recommend regular eye and ear exams, skin care, vitamin D supplements, and cautious use of medications for managing congenital ichthyoses.

Finasteride affects brain and blood steroids, causing lasting sexual and emotional side effects.

Immunosuppressive and anti-TNF therapies in IBD patients can increase the risk of skin cancer and cause various skin issues.

Certain signals and genes play a key role in hair growth and regeneration, and understanding these could lead to new treatments for skin regeneration.

There are still challenges in diagnosing and treating chronic skin diseases, but there is hope for future improvements.

High doses of cyproterone acetate increase the risk of brain tumors in women, but the risk decreases after stopping the medication.

The conclusion is that individual differences in COVID-19 severity are influenced by factors like age, sex, race, and genetics, which are important for personalized medicine.