Browsing by Author "Matsumoto, Lisa R."

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    HPV type 16 E6 and NFX1-123 Augment JNK Signaling to Mediate Keratinocyte Differentiation and L1 Expression
    (Elsevier, 2019-03-16) Levan, Justine; Vliet-Gregg, Portia A.; Robinson, Kristin L.; Matsumoto, Lisa R.; Katzenellenbogen, Rachel A.; Pediatrics, School of Medicine
    The HPV life cycle is differentiation-dependent, with cellular differentiation driving initiation of the late, productive stage of the viral life cycle. Here, we identify a role for the protein NFX1-123 in regulating keratinocyte differentiation and events of the late HPV life cycle. NFX1-123 itself increased with differentiation of epithelial cells. Greater NFX1-123 augmented differentiation marker expression and JNK phosphorylation in differentiating 16E6-expressing human foreskin keratinocytes (16E6 HFKs). This was associated with altered expression of MKK4 and MKK7, upstream kinase regulators of JNK phosphorylation. Modulating levels of NFX1-123 in HPV16-positive W12E cells recapitulated the effects on differentiation markers, JNK phosphorylation, and MKK4/7 seen in 16E6 HFKs. Crucially, levels of NFX1-123 also correlated with expression of L1, the capsid protein of HPV. Altogether, these studies define a role for NFX1-123 in mediating epithelial differentiation through the JNK signaling pathway, potentially linking expression of cellular genes and HPV genes during differentiation.