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The skin is a complex barrier for drug penetration, but understanding its structure and interactions can improve drug delivery methods.

Scientists have found a way to create hair follicles from skin cells of newborn mice, which can grow and cycle naturally when injected into adult mouse skin.

Stress stops hair growth in mice by causing early hair growth phase end and harmful inflammation through a specific nerve-related pathway.

Regulatory T-cells are important for healing and regenerating tissues in various organs by controlling immune responses and aiding stem cells.

Different types of skin cells have unique genetic markers that affect how likely they are to spread cancer.

Keratinocytes help heal skin wounds by interacting with immune cells and producing substances that kill pathogens.

Periodontal ligament stem cells show promise for regrowing tissues but require more research for safe, effective use.

Protoporphyrin IX is useful in cancer treatment but can cause health problems if not properly regulated.

Asia has made significant progress in tissue engineering and regenerative medicine, but wider clinical use requires more development.

Potassium channel openers are effective in treating heart conditions, high blood pressure, pulmonary diseases, bladder issues, and hair loss, but more selective drugs are needed.

Nutraceuticals may improve skin health and protect against aging, but more research is needed on their optimal use and possible health risks.

New antifungal treatments for a children's scalp infection are effective and safe, but it's not decided if they will become the preferred option over the old treatment.

MDP hydrogel heals wounds faster and better than other treatments in diabetic mice.

Fat cells are important for healthy skin, hair growth, and healing, and changes in these cells can affect skin conditions and aging.

The dermal regeneration template is effective in skin regeneration, reducing scarring, and has potential for future improvements.

Advanced hydrogel systems with therapeutic agents could greatly improve acute and chronic wound treatment.

Skin problems are very common in people with end-stage kidney disease.

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

Microneedle technology has improved drug delivery and patient comfort but needs more research for broader use.

Some psychiatric medications can cause hair loss, but it usually grows back after adjusting the medication.

Stem cells help repair tissue mainly by releasing beneficial substances, not by replacing damaged cells.

Glutamine metabolism affects hair stem cell maintenance and their ability to change back to stem cells.

HIV can cause various nail and hair disorders, important for early diagnosis and treatment.

Polyamines help fix DNA damage accurately in cells.

Regenerative pharmacology, which combines drugs with regenerative medicine, shows promise for repairing damaged body parts and needs more interdisciplinary research.

Surface-modified nanoparticles mainly use non-follicular pathways to enhance skin permeation of ibuprofen and could improve treatment for inflammatory skin diseases.

Scientists created tiny particles that release medicine on the skin and in hair, working better at certain pH levels and being safe for skin cells.

Adult female acne requires a comprehensive treatment approach, including medical options and lifestyle changes, with attention to psychological well-being.

FA2H is essential for normal fur and sebum production in mice.

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.