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

The telogen phase of hair growth is active and important for preparing hair follicles for regeneration, not just a resting stage.

Macrophages help regrow hair by activating stem cells using AKT/β-catenin and TNF.

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

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

Activating the Wnt/β-catenin pathway could lead to new hair loss treatments.

Sponge helps heal wounds faster with less inflammation and better skin/hair growth.

Dermal Papilla cells are a promising tool for evaluating hair growth treatments.

Cells in hair follicles help create fat cells in the skin by releasing a protein called Sonic Hedgehog.

Exosomes from dermal papilla cells help hair growth by making hair follicle stem cells multiply and change.

The p53 protein helps control hair follicle shrinking by promoting cell death in mice.

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

Hair growth is influenced by interactions between skin layers, growth factors, and hormones, but the exact mechanisms are not fully understood.

Applying a specific inhibitor lightens skin and hair color.

Disruptions in hair follicle fibroblast dynamics can cause hair growth problems.

Keratin peptides can change hair shape gently without harsh chemicals.

Mice lacking Insig proteins had hair growth problems due to cholesterol buildup, but this was fixed by the drug simvastatin.

The conclusion is that we need more effective hair loss treatments than the current ones, and these could include new drugs, gene and stem cell therapy, hormones, and scalp cooling, but they all need thorough safety testing.

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

Peptide hydrogel scaffolds help grow new hair follicles using stem cells.

Geranium sibiricum extract helps hair grow and is more effective than minoxidil but can be toxic in high concentrations.

Cell-based therapies using dermal papilla cells and adipocyte lineage cells show potential for hair regeneration.

Vitamin D3 can help improve hair growth by enhancing the function of specific skin cells and could be useful in hair regeneration treatments.

Menopause affects hair and skin; more research needed for treatment.

Hair disorders are caused by a complex mix of biology, genetics, hormones, and environmental factors, affecting hair growth and leading to conditions like alopecia.

Researchers created early-stage hair-like structures from skin cells, showing how these cells can self-organize, but more is needed for complete hair growth.

Certain Chinese herbs, especially Cacumen platycladi, can promote hair regrowth and reduce hair loss-related hormone levels in mice.

Some plants with flavonoids may help treat hair loss and promote hair growth.

CD34 marks potential stem cells in dog hair follicles.

Good haircare and communication with doctors are key for managing hair loss.