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Stem cells regenerate tissues and their behavior varies by environment, suggesting the hematopoietic system model may need revision.

Melatonin may help with sleep issues, depression, and cancer, but more research is needed.

The article concludes that while we understand a lot about how melanocytes age and how this can prevent cancer, there are still unanswered questions about certain pathways and genes involved.

PPAR agonists show promise for skin conditions but need more research before being a main treatment.

WNT10A helps esophageal cancer cells spread and keep renewing themselves.

The document concludes that careful evaluation is needed to diagnose PCOS correctly due to similar symptoms in other conditions, and accurate testosterone level measurement is crucial.

In vivo lineage labelling is better than in vitro methods for identifying and understanding stem cells.

Hirsutism is too much hair growth in women like the pattern in men, often caused by high male hormones, and can be treated with hormone control and hair removal methods.

Feathers are useful for researching growth, regeneration, and the effects of treatments like chemotherapy on hair loss.

Patients with advanced breast cancer and high hormone receptor levels who had surgery for ovarian/pelvic metastases lived longer, especially if they had high estrogen receptor levels.

The document concludes that while some organisms can regenerate body parts, mammals generally cannot, and cancer progression is complex, involving mutations rather than a strict stem cell hierarchy.

Different types of fibroblasts play specific roles in wound healing and cancer, which could help improve treatments.

The guide explains how to diagnose and treat hair loss in dogs, covering causes and treatments, with some conditions lacking treatment options.

Copper-doxorubicin nanoparticles effectively treat tumors with less toxicity.

The gene p53 is crucial for removing damaged cells to allow for healthy tissue renewal.

SOX2 is crucial for skin cell function and hair growth, and it plays a role in skin cancer and wound healing.

Thymosin β4 and VEGF are important for blood vessel formation in many organs.

Early development of hair, teeth, and glands involves specific signaling pathways and cellular interactions.

Hair loss due to scalp metastasis from breast cancer, known as Neoplastic Alopecia, has a better survival rate than other scalp metastases and requires a biopsy for diagnosis.

The document explains what healthy skin, nails, and hair look like on an ultrasound.

Spironolactone can cause side effects like high potassium levels and breast enlargement, and patients need careful monitoring.

Experts recommend using evidence-based methods to diagnose and treat hirsutism, focusing on symptoms and underlying causes.

Calreticulin has roles in healing, immune response, and disease beyond its known functions in the endoplasmic reticulum.

Stem cell niches are crucial for regulating stem cell behavior and tissue health, and their decline can impact aging and cancer.

The PDGF/PDGFR pathway is a potential drug target with mixed success in treating various diseases, including some cancers and fibrosis.

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

Cancer cells often have more copies of TERT and TERC genes, which helps them grow and could affect patient outcomes.

Using CRISPR for gene editing in the body is promising but needs better delivery methods to be more efficient and specific.

Disrupting Acvr1b in mice causes severe hair loss and thicker skin.

Certain inhibitors can potentially treat prostate cancer and other hormone-dependent conditions by controlling sex hormone levels in cells.