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Testosterone can slow hair growth in adult monkeys, but a blocker called RU 58841 can counteract this and potentially help hair regrow.

Testosterone affects hair follicles differently across body sites, with beard hair follicles showing more activity of a specific enzyme and presence of androgen receptors compared to scalp hair.

Skin needs dermal β-catenin activity for hair growth and skin cell multiplication.

HIF-1α is important for hair growth and could be a treatment target for hair loss.

Androgens are important for female fertility and could help in IVF treatment, but also play a role in causing PCOS.

The method successfully isolates cells that are important for hair growth and could help study hair loss.

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

PCOS causes infertility mainly due to hormonal imbalances, insulin resistance, and chronic inflammation.

The best method for transplanting skin cells to regenerate hair follicles is the Hemi-vascularized sandwich method, as it produces more mature follicles and promotes hair growth.

Adenosine helps hair grow longer and stronger by boosting certain growth factors and signaling pathways.

Beard cells, unlike scalp cells, produce growth factors in response to testosterone, which may explain differences in hair growth.

Human skin cells contain Protease Nexin-1, and male hormones can decrease its levels, potentially affecting hair growth.

Different types of stem cells help maintain and heal skin.

Hair growth can be induced by transplanting certain cells, but these cells lose their properties during culturing. The best cell interaction happens in a liquid medium under gravity, and using collagen doesn't help. Future research could focus on using growth factors to stimulate these cells.

Rubus coreanum may help hair growth but not through the tested mechanisms, and none of the herbal extracts help with acne.

Sorafenib can cause delayed skin problems, so patients need careful monitoring.

Researchers developed a method to grow hair follicle cells for transplantation using a special chip.

Encapsulated human hair cells can substitute for natural hair cells to grow hair.

Different types of fibroblasts play various roles in diseases and healing, and more research on them could improve treatments.

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

Human placenta hydrogel helps restore cells needed for hair growth.

Host cells are crucial for the maturation of reconstructed hair follicles.

The new method can create hair follicle-like structures but not complete hair with roots and shafts, needing more improvement.

Epidermal stem cells show promise for treating orthopedic injuries and diseases.

Modified stem cells that overexpress a specific protein can improve hair growth and reduce hair abnormalities in mice.

Noggin is necessary to start the hair growth phase in skin after birth.

Combining specific inducers helps dermal papilla cells regain hair-forming ability.

Animal models are crucial for learning about hair loss and finding treatments.

Stem cells could improve hair growth and new treatments for baldness are being researched.

The document concludes that sex hormones are crucial for mammalian reproduction, health, and behavior, and require more research for therapeutic use.