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Hair follicle stem cells prevent melanocyte stem cells from differentiating by controlling retinoic acid levels.

Hyper-keratinisation in Meibomian glands contributes to gland dysfunction.

All-trans retinoic acid helps amelanotic melanocytes in hair follicles develop and produce pigment while reducing their growth.

Human hair follicle cells can be turned into neural stem cell-like cells, which might help treat brain diseases.

Skin-associated cartilage cells can influence hair growth by altering specific signaling pathways.

Outer root sheath cells consistently express certain keratins influenced by their environment.

Keratin K14 expression varies between hair follicles and epidermis, affecting cell differentiation.

Activin A and follistatin control when ear hair cells form in mice.

SOX11 and SOX4 help skin cells act like embryonic cells to heal wounds in mice.

Msx2 and Foxn1 are both crucial for hair growth and health.

Oxidative stress causes hair to gray by damaging and killing pigment cells.

Cornification is how skin cells die to form the protective outer layer of skin, hair, and nails.

Hair follicle cells resist turning into skin cells.

Fetal hair follicles have melanocytes with melanosomes at different stages, which are broken down into pigment particles in keratinocytes.

Inherited ichthyoses cause widespread skin scaling and thickening due to gene mutations.

Orai1 protein is crucial for tooth development and affects enamel thickness and mineralization.

High ornithine decarboxylase levels may lead to hair loss and cancer by increasing CK2 activity in the nucleus.

Polyamines are crucial for skin tumor development, and inhibiting them can prevent tumors.

Physioxia improves keratinocyte protection against oxidative stress and better mimics real skin conditions.

Calcium signals and SHH guide the direction of feather growth in chicken skin.

Activin A speeds up ear hair cell differentiation, while Follistatin slows it down.

Asymmetric hair follicle differentiation causes the unique shape of kinky hair.

Frontal fibrosing alopecia and ulerythema ophryogenes may be related and can evolve from one to the other.

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

ACOD1 deficiency worsens hair loss by causing cell aging and mitochondrial problems, but 4-OI may help.

Pilomatricomas don't follow the usual hair follicle cell differentiation process.

The paper concludes that understanding melanocyte development can help in insights into skin diseases and melanoma diversity.

Sox2-positive cells determine specific hair follicle types in mammals.