keratinizing barrier epithelial cell keratinocyte An epidermal cell which synthesizes keratin and undergoes a characteristic change as it moves upward from the basal layers of the epidermis to the cornified (horny) layer of the skin. Successive stages of differentiation of the keratinocytes forming the epidermal layers are basal cell, spinous or prickle cell, and the granular cell. BTO:0000667 CALOHA:TS-0500 CL:0002185 FMA:62879 Keratinocytes are reportedly CDw210a-negative, CDw210b-positive, CD281-positive, CD282-positive, CD285-positive, IL22Ra1-positive, Human keratinocytes are reportedly capable of secreting BD-2, BD-3, hCAP-18, CXCL1, CXCL5, CXCL8, elafin, MMP-3, NGAL, PDGF-A, S100A7, S100A8, and S100A9. Transcription factors: STAT3-positive. cell keratinized cell of epidermis malpighian cell epidermal cell