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Kidney stones form due to factors like urine concentration, calcium deposits, hormones, gut bacteria, and immune response.

Tofacitinib is safe and effective for severe alopecia areata, but hair loss may return 2 months after stopping treatment.

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

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

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

Researchers created human hair follicles using a new method that could help treat hair loss.

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.

Different types of skin cells have unique genetic markers that affect how likely they are to spread cancer.

Mechanical stretching of the skin can promote hair growth by activating certain immune cells.

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.

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

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

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.

Fat cells in the skin help start healing and form important repair cells after injury.

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

Frontal fibrosing alopecia is linked to four genetic areas, especially the HLA-B*07:02 allele.

PDGFA/AKT signaling is important for the growth and maintenance of certain skin fat cells.

Newborn mouse skin cells can grow hair and this process can be recreated in adult cells to potentially help with hair loss.

Hidradenitis suppurativa is caused by genetic factors, inflammation, bacteria, hormones, and lifestyle factors like obesity and smoking.

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.

Engineered exosomes show promise for improving wound healing but face challenges in clinical use.

Short-chain fatty acids from *Cutibacterium acnes* cause skin inflammation, contributing to acne.

Securinine and ajmaline may effectively treat liver cancer, with securinine being less toxic to normal cells.

Air pollution (PM10) increases skin inflammation and aging by reducing collagen and may trigger a repair response in skin cells.

FFA's causes may include environmental triggers and genetic factors.

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