alexa Comparison of stress-induced PRINS gene expression in normal human keratinocytes and HaCaT cells.
Neurology

Neurology

Journal of Neurology & Neurophysiology

Author(s): Bari L, Bacsa S, Sonkoly E, BataCsrgo Z, Kemny L,

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Abstract Psoriasis is a chronic inflammatory skin disease that affects approximately 2-4\% of the population. We recently described a novel non-coding RNA, psoriasis susceptibility related RNA gene induced by stress (PRINS), that was overexpressed in non-lesional psoriatic epidermis, and its expression was induced by various stress factors such as serum starvation, contact inhibition, ultraviolet (UV)-B irradiation, viral infection and translational inhibition in HaCaT cells. In the present work we set out to compare the stress and microbial agent-induced PRINS expression in normal human keratinocytes (NHKs) and HaCaT cells. Since nuclear factor-κB (NF-κB) is involved in the cellular stress response, we sought to explore whether there is a connection between the NF-κB and PRINS-mediated signal transduction pathways in NHKs and HaCaT cells. We found that the PRINS expression responded differentially to various stress signals and microbial agents in HaCaT cells and in NHKs: after translational inhibition and UV-B treatment, similar induction of PRINS expression occurred with different time courses while after microbial agent treatment, the PRINS expression was significantly induced in HaCaT cells, whereas we could not detect similar changes in NHKs. To explore whether the known NF-κB abnormalities in HaCaT cells could be related to this differential PRINS expression, we silenced the PRINS gene expression with small interfering RNA (siRNA) in both HaCaT cells and in NHKs and monitored NF-κB signal transduction after lipopolysaccharide (LPS) treatment. Silencing of PRINS had no effect on LPS-induced NF-κB activity either in HaCaT cells or in NHKs. Our results indicate that PRINS probably affects keratinocytes functions independently of NF-κB signalling. This article was published in Arch Dermatol Res and referenced in Journal of Neurology & Neurophysiology

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