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

Certain cells from hair follicles can create new hair and contribute to hair growth when implanted in mice.

Artificial skin development has challenges, but new materials and understanding cell behavior could improve tissue repair. Also, certain growth factors and hydrogel technology show promise for advanced skin replacement therapies.

Lifestyle changes can improve body composition, excess male hormone levels, and insulin resistance in women with PCOS.

Male and female bodies respond differently to stress, influenced by hormones and development stages, with implications for stress-related diseases.

Metformin is effective for treating excessive hair growth in women with PCOS and may work better than the standard treatment in some ways.

Women with PCOS are more likely to have impaired glucose tolerance and type 2 diabetes, especially if they are Asian or obese.

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

ATP-dependent chromatin-remodeling complexes are crucial for gene regulation, cell differentiation, and organ development in mammals.

Menopause can lead to skin and hair problems due to hormonal changes, but hormone replacement therapy might help slow these effects.

New effective scar treatments are urgently needed due to the current options' limited success.

Alopecia areata involves immune activation in the scalp, suggesting treatments targeting TH1, TH2, and IL-23 pathways.

Oestrogens are key for bone growth during puberty in both boys and girls.

Epidermal stem cells are diverse and vary in activity, playing key roles in skin maintenance and repair.

Women with PCOS face higher risks of diabetes and heart disease, and these risks increase with obesity.

Different types of stem cells in hair follicles play unique roles in wound healing and hair growth, with some stem cells not originating from existing hair follicles but from non-hair follicle cells. WNT signaling and the Lhx2 factor are key in creating new hair follicles.

Women with PCOS have a higher risk of diabetes and heart problems, especially when they get older.

Trilostane effectively improved symptoms in dogs with a certain adrenal gland disorder.

K_ATP channel gene mutations are linked to heart diseases, but more research is needed to understand the connection and treatment potential.

Skin aging is due to impaired stem cell mobilization or fewer responsive stem cells.

Eating less sugar, milk, and saturated fats and more vegetables and fish may help treat and prevent acne.

Estrogen replacement can improve skin health in menopausal women but doesn't reverse sun damage or prevent hair loss.

Estrogen loss during menopause worsens skin health, but hormone replacement therapy may improve it, though more research is needed.

Feather patterns in birds are shaped by signaling interactions and cell movements, with EDA/EDAR crucial for pattern formation.

TGF-β signaling is crucial for stem cell maintenance, differentiation, and has implications for cancer treatment.

Forehead modification greatly increases the perception of femininity and is a safe procedure.

The conclusion is that PCOS is caused by ovarian sensitivity to hormones and disrupted hormone control, possibly due to ovarian factors, and more research is needed.

Macrophages help heal nerves by aiding the maturation of Schwann cells and are important for nerve repair.

Eating disorders like anorexia and bulimia cause skin problems, and dermatologists can help detect these disorders early for better treatment outcomes.

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