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Within the entire genome, only 10f transcribed RNA actually codes for protein. Few noncoding RNAs (those that do not encode protein) have been well studied.
Terminal differentiation-induced ncRNA (TINCR) is identified by Kretz and colleagues as a long, noncoding RNA (IncRNA) that is upregulated >150-fold in the course of epidermal differentiation. TINCR expression is low in squamous cell carcinoma. Using a 3-D model of skin epidermal differentiation, the researchers found that inhibiting TINCR function did not affect stratification, but it severely compromised expression of differentiation markers, such as loricrin, filaggrin, and keratins 1 and 10. Ultrastructural components such as keratohyalin granules and lamellar bodies were lost, and e…