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miR-22, a type of microRNA, controls hair growth and its overproduction can cause hair loss, while its absence can speed up hair growth.

Androgens prevent hair growth by changing Wnt signals in cells.

Hair follicle regeneration in skin grafts may be possible using stem cells and tissue engineering.

Aging in hair follicle stem cells leads to hair graying, thinning, and loss.

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

Human leukocytes and beard hair follicle cells have internal daily clocks, and PER1 and PER3 genes may indicate individual circadian rhythms.

PDGF signaling is crucial for maintaining and renewing hair follicle stem cells, which could help treat hair loss.

The article concludes that developing in vitro models for human hair structures is important for research and reducing animal testing, but there are challenges like obtaining suitable samples and the models' limitations.

Ca_v1.2 affects hair growth and could be a target for hair loss treatments.

Hormonal changes after childbirth and menopause can lead to women's hair loss and facial hair growth, with a need for better treatments.

Changing light exposure can affect hair growth timing in goats, possibly due to a key gene, CSDC2.

Adding human blood vessel cells to hair follicle germs may improve hair growth and quality.

Hair follicle culture helps develop new treatments for hair loss.

Skin lymphatic vessels are essential for hair growth.

Hes1 protein is important for hair growth and regeneration, and could be a potential treatment for hair loss.

Using a fractional laser can stimulate hair growth, but the intensity and duration of inflammation are crucial. Too much can cause ulcers and scarring. Lower beam energy and fewer treatments are recommended to avoid damage.

Scientists can grow human hair follicle stem cells in a lab without changing their nature, which could help treat hair loss.

Hair sheds gradually from the follicle, with readiness to shed indicated by less attachment material.

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

Gamma-rays exposure during the resting phase of hair growth can damage hair regeneration and color in mice.

Melatonin treatment speeds up fur maturation and changes the hair growth cycle in young chinchillas.

Immune cells are crucial for hair growth and preventing hair loss.

Neural progenitor cell-derived nanovesicles help hair growth by activating a key signaling pathway.

Inositol and arginine solutions improve hair follicle health and turnover.

Light can activate hair growth through a pathway from the eyes to hair follicles.

Lgr5 is a marker for active, long-lasting stem cells in mouse hair follicles.

Hair follicles can regrow in wounded adult mouse skin using a process like embryo development.

Understanding gene expression in hair follicles can reveal insights into hair growth and disorders.

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

The document provides a method to classify human hair growth stages using a model with human scalp on mice, aiming to standardize hair research.