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Melatonin is important for skin health and protection, and can be made by the skin or applied to it.

Different types of skin cells play specific roles in development, healing, and cancer.

WNT10A mutations often cause ectodermal dysplasias, with males showing more tooth issues than females.

Hair follicle development and microbes help regulatory T cells gather in newborn skin.

Hair follicle stem cells use specific chromatin changes to control their growth and differentiation.

Researchers found 19 genes important for root hair growth in a plant called Arabidopsis.

Men are more likely to have severe COVID-19 cases and fatalities than women due to factors like lifestyle, aging, and biological differences.

Epigenetic changes control how adult stem cells work and can lead to diseases like cancer if they go wrong.

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

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

The Sonic hedgehog pathway is crucial for new hair growth during mouse skin healing.

The WNT signaling pathway is important in many diseases and targeting it could offer new treatments.

Too much androgen can cause hair loss; finasteride may help.

Some viruses can cause cancer by changing cell processes and avoiding the immune system; vaccines and targeted treatments help reduce these cancers.

RNAi-based biopesticides could be safe and effective for pest control with careful development and risk assessment.

Male hormones affect COVID-19 severity and certain drugs targeting these hormones could help reduce the risk.

The niche environment controls stem cell behavior and plasticity, which is important for tissue health and repair.

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

Different types of stem cells with unique roles exist in blood, skin, and intestines, and this variety is important for tissue repair.

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

Human hair follicle organ culture is a useful model for hair research with potential for studying hair biology and testing treatments.

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.

Damage to skin releases dsRNA, which activates TLR3 and helps in skin and hair follicle regeneration.

Janus kinase inhibitors are promising treatments for autoimmune skin diseases like eczema and psoriasis.

Stem cell plasticity is crucial for wound healing but can also contribute to cancer development.

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

Rhodococcus equi causes severe pneumonia in young foals, and effective vaccines are needed due to foals' weak immune responses.

The update highlights that non-classic congenital adrenal hyperplasia is common in women with excess male hormones, requires specific hormone tests for diagnosis, and has various treatment options depending on age and symptoms.

The article concludes that the wool follicle is a valuable model for studying tissue interactions and has potential for genetic improvements in wool production.

Men, especially older ones with health issues like prostate cancer, may have worse COVID-19 outcomes and could benefit from therapies targeting male hormones.