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Fibrosis in the bulge area of hair follicles can cause hair thinning in male pattern baldness, and drugs that inhibit fibrosis might help reverse this.

Different thicknesses of hair strands can indicate the severity of hair thinning.

Hair loss and aging are caused by the breakdown of a key protein in hair stem cells.

The document concludes that understanding hair follicle biology can lead to better hair loss treatments.

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

Hair stem cells produce a protein called COL17A1 that plays a key role in their development and is linked to hair thinning and baldness.

UV exposure causes hair thinning, graying, and changes in hair growth cycles in mice.

Intense pulsed light treatment effectively reduces underarm hair by making hair follicles smaller and extending their resting phase.

Damaged hair follicle stem cells may leave the skin to help maintain youthfulness.

Higher fluence in hair removal damages hair follicles more, while lower fluence mimics natural hair regression, with long-term IPL treatments effectively reducing hair.

Bald men with male pattern baldness still have hair stem cells, but lack certain cells needed for hair growth.

Bald men with male pattern baldness still have hair stem cells, but lack certain cells needed for hair growth.

Bald men with male pattern baldness still have hair stem cells, but lack certain cells needed to grow hair.

Miniaturized hairs stay connected to muscle in alopecia areata, allowing possible regrowth, but not in androgenetic alopecia.

AGA causes hair loss through follicle miniaturization and hair cycle changes; regrowth depends on anagen initiation in kenogen follicles.

Male androgenetic alopecia involves hair follicle miniaturization due to DHT, with potential treatments using inhibitors and blockers.

Increased PPARGC1α relates to hair thinning in common baldness.

Ludwig pattern hair loss in women results from varying sensitivity in hair follicles, causing fewer visible hairs.

Androgenetic alopecia is mainly caused by genetic factors and increased androgen activity, leading to hair follicle miniaturization.

AGA progression involves increased lipid synthesis, electron transport, and hair follicle miniaturization.

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.

A gene mutation causes woolly hair in a Syrian patient.

Microinflammation is more intense in smaller hair follicles and may be linked to hair loss.

Tamoxifen may cause female hair loss by increasing androgen receptor expression.

Estetrol (E4) may help treat female pattern hair loss by prolonging hair growth.

Future treatments for androgenic alopecia may focus on reactivating hair follicle stem cells and improving drug delivery.

The document concludes that understanding hair follicle histology and the hair cycle is crucial for diagnosing alopecia.

Estetrol may help prevent hair loss and promote hair growth in women.

Increasing COX-2 in mouse skin causes bigger sebaceous glands and thinner hair, but stopping COX-2 can reverse hair thinning.