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The document reports unique growth lines in a child after Stevens-Johnson syndrome, skin reaction from parsnips and sun in a girl, and itchy skin with xanthomas in a boy with Alagille syndrome.

Keratins are crucial for cell stability, wound healing, and cancer diagnosis.

Keratin 17 is important for skin development and may help define skin cell types.

Stem cells are in deep skin layers, while differentiating cells are in shallow layers.

Epidermolysis bullosa simplex causes easily blistered skin due to faulty skin cell proteins, leading to new treatment ideas.

Keratin proteins are increasingly recognized as important for cell health and are linked to many diseases.

The Apc gene is crucial for normal skin and thymus development.

Basal cell carcinomas in mice can start from hair follicle stem cells and other skin cell types, depending on signaling levels.

Keratin 17 gene mutations cause both steatocystoma multiplex and pachyonychia congenita type 2.

Keratin 17 is crucial for normal hair growth by regulating hair cycle transitions with TNFα.

Hair follicle stem cells can become corneal-like cells, potentially helping restore vision.

Keratin expression reflects cell organization and differentiation, not causes it.

Only one K16 gene on chromosome 17 makes a functional keratin protein.

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

Trichoepitheliomas and some basal cell carcinomas likely come from hair follicle stem cells.

The human K5 promoter controls specific gene expression in skin cells, with key regulatory elements near the TATA box.

Modulating BMP activity changes the number, size, shape, and type of ectodermal organs.

Keratin 17 is crucial for early hair strength and cell survival.

GKLF/KLF4 and Sp1 control Keratin 19 gene activity, influencing cancer-related changes.

Overexpressing COX-2 in mice skin reduces skin tumor development.

The ventral matrix is the main source of the nail plate.

We need more research to better understand human hair follicle stem cells for improved treatments for hair loss and skin cancer.

Keratin 17 is important for hair and nail structure and affects pachyonychia congenita symptoms.

Keratin 16 delays skin maturation and affects skin and hair development in mice.

The K5 promoter controls gene expression in skin cells, with specific DNA segments crucial for targeting and regulation.

Epidermal stem cells don't use gap junctions to communicate.

Mice lacking a key DNA methylation enzyme in skin cells have a lower chance of activating stem cells necessary for hair growth, leading to progressive hair loss.

Trichohyalin may trigger the immune response causing alopecia areata.

Psoriasis causes changes in certain keratins and shrinks sebaceous glands in the scalp.

Keratin 17 is linked to various diseases, including cancer and skin conditions, and may be a target for diagnosis and treatment.