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Hair loss in Androgenetic alopecia (AGA) is due to altered cell sensitivity to hormones, not increased hormone levels. Hair growth periods shorten over time, causing hair to become thinner and shorter. This is linked to miscommunication between cell pathways in hair follicles. There's also a change in gene expression related to blood vessels and cell growth in balding hair follicles. The exact molecular causes of AGA are still unclear.

The mesenchyme can start hair growth, but the exact signal that causes this is still unknown.

Skin stem cells are crucial for maintaining and repairing the skin and hair, using a complex mix of signals to do so.

Fat-related cells are important for initiating hair growth.

β-catenin in the dermal papilla is crucial for normal hair growth and repair.

Androgens can cause hair growth in some areas and hair loss on the scalp.

Notch/CSL signaling controls hair follicle differentiation through Wnt5a and FoxN1.

Exosomes from dermal papilla cells can help grow hair and might treat hair loss.

Blocking β-catenin in skin cells improves hair growth during wound healing.

Skin development in mammals is controlled by key proteins and signals from underlying cells, involving stem cells for maintenance and repair.

Fat cells are important for healthy skin, hair growth, and healing, and changes in these cells can affect skin conditions and aging.

Androgens slow hair growth by altering Wnt signaling in balding cells.

Human hair follicle cells can grow hair when put into mouse skin if they stay in contact with mouse cells.

Dermal exosomes with miR-218-5p boost hair growth by controlling β-catenin signaling.

miR-218-5p helps skin and hair growth by targeting SFRP2 and activating a specific signaling pathway.

Androgens prevent hair growth by changing Wnt signals in cells.

Researchers found a new way to create hair-growing structures in the lab that can grow hair when put into mice.

Hoxc genes control hair growth through Wnt signaling.

Genetic mutations can cause hair growth disorders by affecting key genes and signaling pathways.

Researchers found a way to create cells from stem cells that act like human cells important for hair growth and could be used for hair regeneration treatments.

Heparan sulfate is important for hair growth, preventing new hair formation in mature skin, and controlling oil gland development.

Human placenta hydrogel helps restore cells needed for hair growth.

PI3K/Akt pathway is crucial for hair growth and regeneration.

Malva verticillata seed extract might help treat hair loss by activating hair growth signals in skin cells.

Grouping certain skin cells together activates a growth pathway that helps create new hair follicles.

Keratinocytes help keep hair follicle cells and skin cells separate in 3D cultures, which is important for hair growth research.

Sildenafil, often used for erectile dysfunction, may help hair growth.

Increasing alkaline phosphatase in human skin cells helps to grow more hair.

Platelet-rich plasma can potentially improve hair regeneration by increasing follicular gene expression and hair growth activity.

New hair loss treatments have evolved from understanding hair biology and patient needs.