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Scarless healing is complex and influenced by genetics and environment, while better understanding could improve scar treatment.

Sex hormones may affect COVID-19 severity, with estrogen possibly reducing risk and testosterone potentially increasing it.

FOXN1 mutations cause severe immunodeficiency, hair loss, nail issues, and thymus defects.

Alopecia areata involves both innate and adaptive immunity, with specific genes linked to the disease.

Metformin, usually used for diabetes, can also help treat hair loss from alopecia areata due to its ability to reduce inflammation and stimulate new hair growth.

NKG2D+CD4+ T cells are higher in alopecia areata patients and may be involved in the disease.

The immune system plays a key role in tissue repair, affecting both healing quality and regenerative ability.

Acne is a temporary skin imbalance during puberty that often resolves on its own.

Two-photon microscopy effectively tracks live stem cell activity in mouse skin with minimal harm and clear images.

People with Down syndrome have higher rates of certain immune-related conditions and need special medical attention.

A protein called EGFR protects hair follicle stem cells, and when it's disrupted, hair follicles can be damaged, but blocking certain pathways can restore hair growth.

The article suggests that targeting specific immune pathways could help control and treat the skin disease hidradenitis suppurativa.

Mitochondrial dysfunction may contribute to chronic inflammation and immune system issues in Lichen planopilaris.

Vitamin D made by the skin plays a role in immune defense and skin health, and more research is needed to understand its full effects.

Giving immune serum from vaccinated mice to mice without T cells prevents infection and tumor growth.

An imbalance between certain immune cells is linked to a chronic skin condition and may be influenced by obesity, smoking, and autoimmune issues.

Eating glucoraphanin can help prevent psychosis in offspring whose mothers had immune system activation.

Cell transplantation faces challenges in genitourinary reconstruction, but alternative tissue sources and microencapsulation show promise.

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

A substance called VIP might protect hair follicles from being attacked by the immune system, and problems with VIP signaling could lead to hair loss in alopecia areata.

SOX9 helps determine stem cell roles by interacting with DNA and proteins that control gene activity.

IL-9 increases skin cell movement but decreases their ability to invade, and this effect is controlled by cell contractility, not by MMPs.

Substances from Chinese medicines show promise for immune support and disease prevention, but the way they are processed affects their effectiveness.

Thymic transplantation normalized some T-cells but not others, maintaining immune function.

Brain hormones significantly affect hair color and could potentially be used to prevent or reverse grey hair.

Embryonic and adult stem cells are valuable for improving skin grafts and cell therapy.

Changing the environment around stem cells could help tissue repair, but it's hard to be precise and avoid side effects.

Fat tissue cells are a promising option for healing various diseases, but more research is needed to ensure they are safe and effective.

Alopecia areata is an autoimmune condition causing hair loss due to the immune system attacking hair follicles, often influenced by genetics and stress.

RT1640 treatment reverses gray hair and promotes hair growth in mice.