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Red deer only have androgen receptors in neck hair cells for mane growth during breeding season.

Keratin structure changes during keratinization, but the exact model remains uncertain.

Sulfur mustard damages hair follicles and sebaceous glands in mice.

Alopecia areata may involve stress-related changes affecting hormone receptors, leading to reduced cortisol production.

Old people have less hair because their hair follicles don't regenerate as well, not because of fewer stem cells, and a protein called follistatin might help reactivate hair growth.

Primary health care in Florianópolis mostly treated simple skin conditions, while secondary care handled more complex skin diseases.

Two-photon microscopy improves skin imaging but faces safety and cost challenges for clinical use.

Pancreatic cancer can alter gut and skin bacteria, possibly causing skin issues.

The herbal hair oil effectively nourishes hair and helps with dandruff, hair loss, and split ends without causing skin irritation.

Older women's scalp cells show changes that could contribute to hair thinning.

DNA methylation changes in Tan sheep affect growth and fur traits.

Cleanroom workers in a battery factory have worse skin and eye conditions due to the very dry environment.

A mother's diet at conception can cause lasting genetic changes in her child.

Air pollution worsens skin diseases and aging by causing inflammation and oxidative stress.

Exposure to too much androgen before birth might cause polycystic ovary syndrome later in life.

Women look young for their age due to larger lips, less sun damage, and genes that prevent gray hair and wrinkles.

Stem cell niches support, regulate, and coordinate stem cell functions.

The document concludes that more research is needed to better understand and treat primary cicatricial alopecias, and suggests a possible reclassification based on molecular pathways.

Trilostane effectively improved symptoms in dogs with a certain adrenal gland disorder.

Alopecia areata is an autoimmune disease causing patchy hair loss, often with other autoimmune disorders, but its exact causes are unknown.

The conclusion is that Treg-targeted therapies have potential, but more knowledge of Treg biology is needed for effective treatments, including for cancer.

Hair elemental analysis could be useful for health and exposure assessment but requires more standardization and research.

Eating a high-glycemic diet may worsen acne by increasing certain protein levels and expressions in the skin.

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

We don't fully understand how sunlight damages different types of hair.

β-catenin, Shh, and Bmp signaling control hair follicle development.

Defective mitochondrial DNA replication causes aging symptoms and increased oxidative damage in mice.

The nanohybrid system significantly improved wound healing and showed strong antibacterial activity.

The document concludes that both internal stem cell factors and external influences like the environment and hormones affect hair loss and aging, with potential treatments focusing on these areas.

Certain diets can affect skin conditions, but more research is needed to understand these relationships fully.