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Tight junctions are key for skin protection and controlling what gets absorbed or passes through the skin.

Alopecia areata causes hair loss, has no cure, and various treatments exist.

The dermal papilla is crucial for hair growth and health, and understanding it could lead to new hair loss treatments.

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

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

Postpartum depression is linked to changes in brain chemicals, inflammation, stress, and certain genes, and can potentially be identified by markers like specific steroids, serotonin levels, and vitamin D levels.

Antibiotics can reduce acne but may lead to resistant bacteria, and understanding the skin's bacteria is important for treatment.

Probiotic bacteria improved skin and hair health in aged mice.

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

Lignans and neolignans from plants may help protect against various health issues, including cancer and heart disease.

The document concludes that certain genetic mutations and dietary factors are involved in acne development, and treatments like isotretinoin and diet changes can help manage it.

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

Cholesterol sulfate buildup due to a genetic mutation disrupts the skin barrier, leading to the scaling skin seen in X-linked ichthyosis.

Mutant mice help researchers understand hair growth and related genetic factors.

Circadian rhythms are crucial for stem cell function and tissue repair, and understanding them may improve aging and regeneration treatments.

Changes to the Foxp3 protein affect how well regulatory T cells can control the immune system, which could help treat immune diseases and cancer.

EGF and KGF signalling prevent hair follicle formation and promote skin cell development in mice.

New treatments for Alopecia Areata, like JAK inhibitors, show promise for hair regrowth and are likely to change future treatment approaches.

Mesenchymal stem cells show potential for skin healing and anti-aging, but more research is needed for safe use, especially regarding stem cells from induced pluripotent sources.

Targeting the skin's endocannabinoid system could help treat skin disorders.

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

Beta-caryophyllene helps improve wound healing in mice, especially in females.

Stress can worsen skin conditions by affecting hormone levels and immune response.

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

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

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

Environmental factors at different levels control hair stem cell activity, which could lead to new hair growth and alopecia treatments.

The conclusion is that individual differences in COVID-19 severity are influenced by factors like age, sex, race, and genetics, which are important for personalized medicine.

Researchers found 15 new genetic links to skin traits in Japanese women.

Testosterone may slow down wound healing and increase inflammation.