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Alopecia areata is an autoimmune disease causing patchy hair loss, often with other autoimmune disorders, but its exact causes are unknown.

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

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

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

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.

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

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.

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

Animals that change color with the seasons mainly do so in response to daylight changes, but climate change is causing camouflage problems that may require evolutionary changes.

Lampreys have a functional vitamin D receptor that may help detoxify harmful substances.

MicroRNA-214 is important for skin and hair growth because it affects the Wnt pathway.

Scientists created stem cells that can grow hair and skin.

SOX11 and SOX4 help skin cells act like embryonic cells to heal wounds in mice.

Removing both KLK5 and KLK7 proteins can prevent death and skin issues in Netherton syndrome.

White lupin uses specific genes to grow root hairs and access phosphorus when it's scarce.

Extracellular vesicles show promise for treating diseases but face challenges in development and regulation.

Stress hormone corticosterone blocks a growth factor to slow down hair stem cell activity and hair growth.

Mutations in Gasdermin A3 cause skin inflammation and hair loss by disrupting mitochondria.

The 190-kbp domain contains all human type I hair keratin genes, showing their organization and evolution.

The document concludes that targeting the androgen receptor may be a promising breast cancer treatment, especially for certain types.

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

Oncogenic melanocyte stem cells can develop into melanoma similar to human cases.

A second domain of high sulfur KAP genes on chromosome 21q23 is crucial for hair structure.

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

ZDHHC13 is important for normal liver function and metabolism, affecting mitochondrial activity.

Hair can regrow after certain stem cells are lost because other stem cells can take over their role.

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

Skin bacteria, specifically Staphylococcus aureus, help in wound healing and hair growth by using IL-1β signaling. Using antibiotics on skin wounds can slow down this natural healing process.

The drug enzalutamide may reduce the ability of the virus causing COVID-19 to enter lung cells.