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Stem cells regenerate tissues and their behavior varies by environment, suggesting the hematopoietic system model may need revision.

Collagen makes skin stiff, and preservation methods greatly increase tissue stiffness.

Understanding wool keratin-associated proteins in sheep can help improve wool quality through selective breeding.

Targeting the Smoothened receptor shows promise for treating certain cancers.

The transgene likely activated an oncogene or interrupted a tumor suppressor gene, causing melanoma in mice.

New treatments are needed for PCOS that target its genetic, hormonal, and metabolic causes.

Studying premature aging syndromes helps understand human aging and suggests potential treatments.

Melasma's causes include genetics, sun exposure, hormones, and oxidative stress, and understanding these can help create better treatments.

Certain natural and synthetic compounds may help treat inflammatory skin diseases by targeting a specific signaling pathway.

Special gels help heal diabetic foot sores and reduce the risk of amputation or death.

The document concludes that various signaling pathways and genetic factors are crucial for chicken feather development, affecting poultry quality.

Biodegradable polymers can improve cannabinoid delivery but need more clinical trials.

Human hair has more unsaturated fats inside than on the surface, and certain lipids may help bind the outer and inner layers together.

A new hair transplant method creates one appealing scar, uses donor hair better, and speeds up surgery.

Melanin density affects hair color, and this method can help in cosmetic assessments and diagnosing hair diseases.

Nasolabial skin-fat grafts are good for nasal reconstruction with minimal scarring and no need for bolsters, but smoking may affect graft survival.

Visual field defects in lupus nephritis can be caused by hypertensive retinopathy, not glaucoma or medication toxicity.

The article concludes that cranial reconstruction should aim for the best aesthetic result, using various techniques tailored to individual needs and conditions.

Walter P. Unger suggests using advanced hair transplant techniques for broader coverage, as they provide natural results and use donor tissue efficiently, while also recommending personalized planning due to the unpredictable progression of baldness.

Human hair structure varies by ethnicity, and certain treatments can improve hair condition and appearance.

Twisting hair weakens it, but strength can be recovered at low twist levels.

DVI provides detailed 3D imaging of hair and shows how various products protect and enhance hair.

A new method helps understand hair shine and various products improve hair care.

No treatment fully prevents hair loss from chemotherapy yet.

The pedicled temporoparietal fascial flap is a reliable and versatile option for reconstructive surgery in the head and neck area.

Combining microsurgery with craniofacial reconstruction improves aesthetic results and reduces harm to the area where tissue is taken from.

α-Tocopheryl acetate is well absorbed through healthy skin.

Surface and internal treatments can help prevent hair lipid loss during washing.

Using sharp tools and the right techniques in hair transplant surgery leads to less damage to hair follicles.

The review concluded that keeping the hair-growing ability of human dermal papilla cells is key for hair development and growth.