Early stages of hair follicle development: a step by step microarray identity.

Hair follicle morphogenesis requires an epithelial-mesenchymal cross-talk during development, from hair placode to hair peg, and finally hair follicle formation. During this step, factors known as activators and inhibitors allow the patterning distribution of hair follicle within the skin. Our goal was to investigate the modulation of expression of various factors already known to be part of the hair placode formation, and to identify novel factors involved during the initiation of this process.