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Low doses of some substances can be beneficial, while high doses can be harmful or toxic.

The document concludes that for hair and feather growth, it's better to target the environment around stem cells than the cells themselves.

Stretching skin increases a certain protein that attracts stem cells, helping skin regeneration.

Human alpha defensin 5 helps heal wounds, reduce bacteria, and grow hair on burned skin.

Rapamycin treatment helps with mitochondrial disease by reducing PKC levels.

Mice can regenerate ear tissue without the p53 protein.

The study created a test that found hormonal and toxic effects in plant and fungal extracts using prostate cancer cells.

Using micro skin tissue columns improves skin wound healing and reduces scarring.

Hairless HRS/J mice resist Bacillus anthracis skin infections due to high numbers of immune cells, not because they lack hair follicles.

Genetically modified sheep with more β-catenin grew more wool without changing the wool's length or thickness.

Using developmental signaling pathways could improve adult wound healing by mimicking scarless embryonic healing.

Skin aging reflects overall body aging and can indicate internal health conditions.

Tet1/2/3 enzymes affect hair follicle cell development by influencing BMP signaling.

Wnt-signaling is regulated differently in skin cells and immune responses during wound healing.

The Rotterdam Study found risk factors for elderly diseases, links between lifestyle and genetics with health conditions, and aimed to explore new areas like DNA methylation and sensory input effects on brain function.

Anticancer drugs are increasingly found in surface waters, and their long-term environmental effects are not well understood, requiring better testing methods.

The conclusion is that using drugs to block the TOR pathway might slow aging and prevent age-related diseases.

The research shows that a gene called Wnt3 affects hair growth and structure, causing short hair and balding when overactive.

Melanocytes are crucial for skin pigmentation and can affect conditions like melanoma, vitiligo, and albinism, as well as hair color and hearing.

New methods have greatly improved our understanding of stem cell behavior and roles in the body.

The research explains how a human enzyme binds and processes its substrate, which could relate to its role in biological functions and hair loss.

Chromium salts may help with insulin sensitivity in PCOS, but more research is needed to confirm their overall effectiveness and safety.

Citrullus colocynthis and Citrullus lanatus have potential health benefits but may also cause reproductive toxicity.

New treatments and technologies in laser medicine show promise for improving skin conditions, fat reduction, cancer treatment, wound healing, and hair restoration.

The document concludes that stem cells and their environments are crucial for skin and hair health and have potential for medical treatments.

Keratin-associated proteins have ancient origins and were used for different purposes before being adapted for hair in mammals.

L-PGDS has specific binding sites for its functions and could help in drug delivery system design.

The skin's internal clock affects healing, cancer risk, aging, immunity, and hair growth, and disruptions can harm skin health.

Toxic Shock Syndrome cases increased due to new factors, but decreased with public health measures and changes in tampon use.

Genes related to pigmentation, body rhythms, and behavior change during hares' seasonal coat color transition, with a common genetic mechanism in two hare species.