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The document concludes that while significant progress has been made in understanding skin biology and stem cells, more research is needed to fully understand their interactions with their environment.

Hair grows faster in the morning and is more vulnerable to damage from radiation due to the internal clock in hair follicle cells.

The p75 neurotrophin receptor is important for hair follicle regression by controlling cell death.

Oxidative stress affects hair loss in men with androgenetic alopecia.

All-trans retinoic acid causes hair loss by increasing TGF-β2 in hair follicle cells.

Wool follicles are complex, involving interactions between different cell types and structures.

Minoxidil boosts hair growth by activating PGHS-1.

Liver transplantation is a viable option for children with propionic acidemia, improving quality of life and diet, but does not remove all risks and long-term brain outcomes are uncertain.

Human hair follicles produce and respond to erythropoietin, helping protect against stress.

The new assay can track and measure melanosome transfer between skin cells, confirming filopodia's role in this process.

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

The length of the CAG repeat in the androgen receptor gene affects the risk and progression of prostate cancer, BPH, infertility, and undermasculinized genitalia.

The study suggests that motor neurons created from stem cells of patients with spinal and bulbar muscular atrophy show signs of the disease, including changes in protein levels and cell functions.

Androgens prevent hair growth by changing Wnt signals in cells.

Topical immunotherapy, especially with DPCP, is effective for treating severe alopecia areata.

Different hair protein amounts change the strength of keratin/chitosan gels, useful for making predictable tissue engineering materials.

Low-dose UVB light improves hair growth effects of certain stem cells by increasing reactive oxygen species.

A tripeptide-copper complex may help hair grow by increasing cell growth and decreasing cell death.

The conclusion suggests that prostate cancer should be classified by castration status and that new therapies targeting androgen receptor signaling show promise.

A new skin-whitening agent using a peptide from wheat is safe and effective at reducing skin pigmentation.

Minoxidil affects cell growth in two ways: low doses increase growth, while high doses slow it down and can be toxic.

Single Blimp1+ cells can create functional sebaceous gland organoids in the lab.

The article concludes that developing in vitro models for human hair structures is important for research and reducing animal testing, but there are challenges like obtaining suitable samples and the models' limitations.

Ginsenoside Rb1 from Panax ginseng helps mink hair grow by activating certain cell signals.

Allopregnanolone increases growth and changes gene activity in human brain cancer cells.

C-reactive protein helps monocytes stick to blood vessel cells by causing oxidative stress.

Colchicine can inhibit hair growth by affecting cell activity and protein expression in hair follicles.

Skin lymphatic vessels are essential for hair growth.

Balding hair follicle cells are smaller, grow less well, and need more effort to culture than non-balding cells.

6-Gingerol, found in ginger, may slow down hair growth and could be used for hair removal.