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Different types of stem cells exist within individual skin layers, and they can adapt to damage, transplantation, or tumor growth. These cells are regulated by their environment and genetic factors. Tumor growth is driven by expanding, genetically altered cells, not long-lived mutant stem cells. There's evidence of cancer stem cells in skin tumors. Other cells, bacteria, and genetic factors help maintain balance and contribute to disease progression. A method for growing mini organs from single cells has been developed.

Obesity is linked to various skin problems and may increase the risk of skin cancer.

The skin's internal clock affects healing, cancer risk, aging, immunity, and hair growth, and disruptions can harm skin health.

TRP channels in the skin are important for sensation and health, and targeting them could help treat skin disorders.

New targets for making and using brain-synthesized steroids could lead to better treatments for brain disorders and alcoholism.

Hair follicles produce and respond to melatonin, affecting hair growth and sensitivity to estrogen.

Hibiscus plant extracts may have health benefits like lowering blood pressure and protecting the heart.

Understanding how cells die in the skin is important for treating skin diseases and preventing hair loss.

The hydrogel with a 1:3 ratio of hydroxyethyl cellulose to hyaluronic acid is effective for delivering drugs through the skin to treat acne.

The document concludes that hair is complex, with a detailed growth cycle, structure, and clinical importance, affecting various scientific and medical fields.

Skin surface lipids are important for skin health and altering them could help prevent aging and treat skin conditions.

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

Fullerenes show potential in skin care but need more safety research.

The document concludes that adult mammalian skin contains multiple stem cell populations with specific markers, important for understanding skin regeneration and related conditions.

Polygonum multiflorum extract helps grow hair by activating certain hair growth signals in mice.

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

Certain steroids in the brain affect mood and symptoms of depression, and treatments targeting these steroids show promise for improving these symptoms.

PDRN helps repair tissue and improve wound healing with a high safety profile.

Nearly half of the French individuals surveyed reported having a sensitive scalp, more common in women, often linked to hair loss and symptoms like itching, and triggered by factors including shampoos and pollution.

Menopause reduces skin collagen and elasticity, and while estrogen therapy can help, its risks require careful consideration.

Beta-sitosterol has potential health benefits but needs more research to fully understand its effects and improve its use in treatments.

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

Minoxidil works better than nitroglycerin for treating impotence with fewer side effects.

The p53 protein helps control hair follicle shrinking by promoting cell death in mice.

Advanced human skin models improve drug development and could replace animal testing.

New LPA receptors (LPA4, LPA5, LPA6) have diverse roles in the body.

Advanced nanocarrier and microneedle drug delivery methods are more effective, safer, and less invasive for treating skin diseases.

Skin problems can be caused or worsened by physical forces and pressure on the skin.

Skin fat has important roles in hair growth, skin repair, immune defense, and aging, and could be targeted for skin and hair treatments.

Compartmentalized organization might be crucial for stem cells to effectively respond to growth or injury.