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Tight junctions are key for skin protection and controlling what gets absorbed or passes through the skin.

Endoscopic forehead and brow lifting safely and consistently improves aged eyebrows, but may have complications.

Hair root sheaths are more common in non-scarring hair loss and help diagnose the type of hair loss.

Nestin identifies specific progenitor cells in hair follicles that can become outer root sheath cells.

Basal cell carcinoma mostly starts from cells in the upper skin layers, not hair follicle stem cells.

Hair in mammals likely evolved from glandular structures, not scales.

EGF makes hair follicles grow longer but stops hair production.

Human hair has a protective lipid layer that can be damaged by moisture and treatments, affecting hair growth and health.

μ-Crystallin may help hair growth by affecting thyroid hormone levels in mouse hair follicles.

Minoxidil use can cause trichostasis spinulosa in long-term hair loss patients.

The TAP flap is effective for treating armpit scars from burns, and tissue-engineered templates with hair follicles can help treat scalp burn alopecia.

Cathepsin L is essential for normal hair growth and development.

K6hf is a unique protein found only in a specific layer of hair follicles.

Mouse hair follicle cells briefly grow during the early hair growth phase, showing that these cells are important for starting the hair cycle.

The document concludes that accurate diagnosis of different types of hair loss requires careful examination of hair and scalp tissue, considering both clinical and microscopic features.

Male hormones are important for hair and oil gland development and can cause conditions like excessive hair growth and acne.

Human hair follicle stem cells show signs of low oxygen levels, which may be important for hair growth and preventing baldness.

Reflectance confocal microscopy is a useful, non-invasive tool for diagnosing some skin diseases, with potential for future improvements.

The hair follicle bulge is an important area for adult stem cells involved in hair growth and repair, with potential for medical use needing more research.

VDUP1 is found in skin and hair follicles, interacts with sciellin, and may help regulate skin cell differentiation.

CCCA is a common, progressive hair loss condition that may not always be linked to hair care practices and requires a biopsy for diagnosis.

PGF_2α receptors in human eyelids are found in specific parts of hair follicles, explaining eyelash changes with glaucoma treatment.

Sheep wool follicles absorb different amino acids at various rates and locations, which could affect wool growth based on diet and genetics.

ADAM 10 and ADAM 12 proteins are involved in different stages of hair growth and could be targets for treating hair disorders.

The document concludes that the hair cycle is a complex process involving growth, regression, and rest phases, regulated by various molecular signals.

Hair regeneration needs dynamic cell behavior and mesenchyme presence for stem cell activation.

The document concludes that assessing hair follicle damage due to cyclophosphamide in mice involves analyzing structural changes and suggests a scoring system for standardized evaluation.

The document concludes that the hair cycle is a complex process involving growth, regression, and rest phases, regulated by various molecular signals.

A new keratin, hK6irs1, is found in all layers of the hair follicle's inner root sheath.

Fat tissue stem cells may help increase hair growth.