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Tributyltin exposure causes sex changes, sterilization, and decline in the snail Ocinebrina aciculata, risking its extinction.

Stem cell self-renewal is complex and needs more research for full understanding.

Aging causes skin stem cells to work less effectively.

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

Mouse hair follicle cells briefly grow during the early hair growth phase, showing that these cells are important for starting the hair cycle.

Flutamide effectively reduced excessive hair growth and improved related symptoms in hirsutism patients without significant side effects.

Taking selenium supplements during chemotherapy may help reduce side effects and improve health markers in ovarian cancer patients.

Normal skin cell renewal doesn't need RAR signaling, but vitamin A-related skin thickening does.

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

Hair follicles produce and respond to melatonin, affecting hair growth and sensitivity to estrogen.

Finasteride exposure in pregnancy causes genital abnormalities in male rats.

Male hormones like testosterone may make COVID-19 worse, and testing for sensitivity to these hormones could help predict how severe a patient's symptoms might be. Treatments that reduce these hormones are being explored.

Hibiscus plant extracts may have health benefits like lowering blood pressure and protecting the heart.

Fibroblast growth factor receptor signaling controls cell development and repair, and its malfunction can cause disorders and cancer, but it also offers potential for targeted therapies.

Exposure to finasteride in the womb caused lasting reproductive issues in male rats.

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

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.

KGF and activin are crucial for skin healing and repair.

Melatonin helps regulate hair growth and protects the hair follicle from stress.

The document concludes that hair is complex, with a detailed growth cycle, structure, and clinical importance, affecting various scientific and medical fields.

New single-cell analysis techniques are improving our understanding of stem cells and could help in treating diseases.

Formyl-peptide receptor agonists could be new anti-inflammatory drugs.

Finasteride doesn't harm male fertility or sperm quality, but may slightly reduce ejaculate volume.

FGF signaling is a promising target for developing treatments for wounds, metabolic diseases, and cancer.

Both genes and environmental factors like chemicals may contribute to the increase in hypospadias, but the exact causes are still unclear.

Minoxidil with propranolol and diuretics lowers blood pressure but causes fluid retention and hair growth.

5α-reductase is essential for male sexual development and its inhibitors have potential in treating various conditions related to hormone action.

Cystatin M/E strongly inhibits cathepsin V and cathepsin L, important for skin formation.

Prolactin affects hair growth and skin conditions, and could be a target for new skin disease treatments.

A cluster of sulfur-rich hair protein genes was found on chromosome 17.