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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.

Cells from certain embryo parts can induce head formation in another embryo, involving complex signaling pathways.

RSPO1 mutations in certain patients lead to skin cells that don't develop properly and are more likely to become invasive, increasing the risk of skin cancer.

Substances from fat-derived stem cells can promote hair growth and counteract hormone-related hair loss by activating a key hair growth pathway.

Disrupting β-catenin signaling in certain cells causes anorectal malformations.

Adenosine can help treat hair loss by promoting hair growth.

Epithelial stem cells are crucial for tissue renewal and repair, and understanding them could improve treatments for damage and cancer.

Too much β-catenin activity can mess up the development of mammary glands and make them more like hair follicles.

3,4,5-tri-O-caffeoylquinic acid promotes hair growth by activating the β-catenin pathway.

Wnt10b makes hair follicles bigger, but DKK1 can reverse this effect.

The conclusion is that certain cell interactions and signals are crucial for hair growth and regeneration.

The enzyme sEH is important for hair growth and its inhibition could help treat hair loss.

β-Catenin signaling is involved in brain cell growth after injury and could be a therapy target.

Different body areas in mice produce different hair types due to interactions between skin layers.

The Sonic hedgehog pathway is crucial for new hair growth during mouse skin healing.

Hedgehog signaling is crucial for mammary gland development over hair follicles.

The right amount of retinoic acid is essential for normal hair growth and development.

Adult stem cells are important for tissue repair and have therapeutic potential, but more research is needed to fully use them.

Ginsenoside Rg4 from ginseng may help hair growth by activating certain cell signals.

Effective PCOS treatments require targeting specific signaling pathways.

Y27632 increases cell growth through EGFR signaling, not ROCK1/2.

The skin systems of jawed vertebrates evolved diverse appendages like hair and scales from a common structure over 420 million years ago.

Activating β-catenin in certain skin cells speeds up hair growth in mice.

Disrupting Notch signaling in blood vessels increases scarring during wound healing in mice.

Estrogen is important for keeping adult mouse nipple skin healthy by controlling certain cell signals.

BMP6 and Wnt10b control whether hair follicles are resting or growing.

Prunus mira kernels contain components that can promote hair growth in mice.

Blood tests can help understand the genetic differences in people with alopecia areata, including how severe it is and if it's inherited.

The protein CCN2 controls hair growth by affecting hair follicle formation and stem cell activity in mice.

People with non-scarring hair loss have higher levels of DKK-1, a protein linked to hair growth, than those with scarring hair loss or no hair loss.