queratinocito

Queratinocito is the name given to the primary cell type found in the epidermis, the outermost layer of the skin. These cells are responsible for producing keratin, a tough, fibrous protein that forms the structural basis of skin, hair, and nails. Keratinocytes originate in the stratum basale, the deepest layer of the epidermis, where they undergo continuous cell division. As they mature and differentiate, they migrate upwards through the epidermal layers, undergoing significant changes in their structure and composition. During this process, they accumulate keratin filaments and eventually flatten and harden, forming the protective barrier of the stratum corneum. This outermost layer of dead, keratinized cells is continuously shed and replaced by new cells from below. Queratinocitos play a crucial role in maintaining the skin's integrity, providing a defense against mechanical stress, pathogens, and dehydration. Their differentiation process is tightly regulated and is essential for wound healing and the overall health of the skin. Disruptions in keratinocyte function or proliferation can lead to various skin conditions.