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Cicatricial alopecia, a permanent hair loss condition, is mainly caused by damage to specific hair follicle stem cells and abnormal immune responses, with gene regulator PPAR-y and lipid metabolism disorders playing significant roles.

Hair greying is linked to reduced ATM protein in hair cells, which protects against stress and damage.

The TGF-β family helps control how cells change and move, affecting skin, hair, and organ development.

Certain mice without specific receptors or mast cells don't lose hair from stress.

Hdac1 and Hdac2 help maintain and protect the cells that control hair growth.

Oleoylethanolamide (OEA) safely boosts fat production in skin cells and may help treat dry skin and reduce inflammation.

Nicotinic acid reduces excessive oil production in skin cells by activating a specific receptor, which could help treat acne.

Low-dose acitretin helps nail psoriasis, stem cells may treat scarring alopecia, Chinese men have lower baldness rates, lateral foldplasty is good for ingrown toenails, hair diameter helps diagnose female baldness, childhood trauma linked to alopecia areata, certain hair-weaving leads to scalp conditions in African American women, and new methods for hair research and understanding hair and sweat gland development were introduced.

Chemotherapy causes hair loss by damaging hair follicles and stem cells, with more research needed for prevention and treatment.

Feather growth and regeneration involve complex patterns, stem cells, and evolutionary insights.

Androgens affect bone and fat cell development differently based on the cells' embryonic origin.

Fgf20 is important for the development and regulation of the cells that form the base of hair follicles.

Microspheres about 1.5 micrometers in size can best penetrate hair follicles, potentially reaching important stem cells.

Urokinase, a type of protein, helps skin cells multiply faster, especially in newborn mice.

Fisetin, a type of polyphenol, may help hair grow by increasing certain protein activities in cells.

α-parvin is necessary for skin and hair growth and for the correct orientation of skin cells.

Telomerase-positive cells are mainly in the bulb matrix and outer root sheath of hair follicles.

A specific RNA increases hair stem cell growth and skin healing by affecting a protein through interaction with a microRNA.

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

Stress hormone corticosterone suppresses hair growth by affecting stem cell activity and Gas6 protein expression.

Most people with scarring and nonscarring hair loss show similar D2-40 levels, but some with scarring hair loss have higher levels.

Aging reduces skin stem cell function, leading to changes like hair loss and slower wound healing.

The document concludes that more research is needed to better understand and treat primary cicatricial alopecias, and suggests a possible reclassification based on molecular pathways.

Sebaceous glands in male pattern hair loss patients have more lobules and might cause early hair growth phase shifts.

Follicular Cell Implantation might become a new treatment for hair loss and could lead to advances in organ regeneration.

Melanocytes produce melanin; their defects cause vitiligo and hair graying, with treatments available for vitiligo.

Skin stem cells interacting with their environment is crucial for maintaining and regenerating skin and hair, and understanding this can help develop new treatments for skin and hair disorders.

Men with baldness due to androgenetic alopecia still have hair stem cells, but lack specific cells needed for hair growth.

Human stem cells can help form hair follicles in mice.

The hair follicle infundibulum plays a key role in skin health and disease, and understanding it better could lead to new skin disease treatments.