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Different types of stem cells with unique roles exist in blood, skin, and intestines, and this variety is important for tissue repair.

Normal skin cell renewal doesn't need RAR signaling, but vitamin A-related skin thickening does.

Men generally have more severe COVID-19 cases and higher death rates than women due to biological differences.

Targeting androgen receptors could be a promising way to treat skin disorders with fewer side effects.

Male pattern baldness involves hormones and cell signals affecting hair growth.

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

Androgens have complex effects on hair growth, promoting it in some areas but causing hair loss in others, and our understanding of this is still evolving.

Zinc is crucial for nutrition, especially in patients with specific health conditions, and requires careful supplementation and monitoring.

Wnt and Notch signaling help wound healing by promoting cell growth and regulating cell differentiation.

Blocking the Wnt pathway could lead to new treatments for cancer and tissue repair but requires careful development to avoid side effects.

The sebaceous gland has more roles than just producing sebum and contributing to acne, and new research could lead to better skin disease treatments.

The document concludes that understanding the genes and pathways involved in hair growth is crucial for developing treatments for hair diseases.

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

A new gene, JMJD1C, may affect testosterone levels in men.

Maintaining DNA health in stem cells is key to preventing aging and tissue breakdown.

Tiny needles with valproic acid can effectively regrow hair.

Acne is caused by genetics, diet, hormones, and bacteria, with treatments not yet curative.

The document concludes that there are no effective clinical treatments for hearing loss due to hair cell damage, but research is ongoing.

Toll-like receptors are important for wound healing, but can slow it down in diabetic wounds.

Kennedy's disease leads to muscle weakness and sensory issues, has no cure but manageable symptoms, and future treatments look promising.

The p53 protein has complex, sometimes contradictory functions, including tumor suppression and promoting cell survival.

The balance between androgen receptor and p53 is crucial for sebaceous gland differentiation.

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

Wnt signaling may be linked to heart diseases in aging and could be a target for future treatments.

Products should be called 'sperm-safe' only after thorough, well-designed tests.

High levels of testosterone and 5α-DHT can lead to cell death in cells important for hair growth.

Testosterone may slow down wound healing and increase inflammation.

Cyclosporin A helps mice grow hair by blocking a specific protein activity in skin cells.

Targeting glucocorticoid action might help treat type-2 diabetes, but human trials are needed.