The anti-apoptotic protein G1P3 is overexpressed in psoriasis and regulated by the non-coding RNA, PRINS.
Psoriasis Susceptibility-Related RNA Gene Induced by Stress (PRINS) is a non-coding RNA overexpressed in lesional and non-lesional psoriatic epidermis and induced by stress. Its function in healthy and psoriatic skin is still not known. Here, we report that PRINS regulates G1P3, a gene with anti-apoptotic effects in keratinocytes. siRNA-mediated inhibition of PRINS gene resulted in altered cell morphology and gene expression alterations, as demonstrated in a microarray experiment. One of the genes regulated by PRINS ncRNA was G1P3, an interferon-inducible gene with anti-apoptotic effects in cancer cells. Interestingly, we found that G1P3 was 400-fold upregulated in hyperproliferative lesional and ninefold upregulated in non-lesional psoriatic epidermis compared to healthy epidermis. In vitro, G1P3 protein levels were highest in proliferating keratinocytes and siRNA-mediated downregulation of G1P3 resulted in increased cell apoptosis. These data indicate that G1P3 inhibits spontaneous keratinocyte apoptosis and hence its high expression in psoriatic skin may contribute to the development of psoriatic lesions. We hypothesize that the deregulation of the PRINS ncRNA may contribute to psoriasis and results in decreased sensitivity to spontaneous keratinocyte apoptosis via the regulation of G1P3.
Szegedi
Krisztina
K
Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary. krisztinaszegedi@yahoo.com
Sonkoly
Eniko
E
Nagy
Nikoletta
N
Németh
István Balázs
IB
Bata-Csörgo
Zsuzsanna
Z
Kemény
Lajos
L
Dobozy
Attila
A
Széll
Márta
M
D017209:Apoptosis / Q000235:genetics*; D001483:Base Sequence; D002454:Cell Differentiation; D049109:Cell Proliferation; D002478:Cells, Cultured; D017931:DNA Primers / Q000235:genetics; D004817:Epidermis / Q000378:metabolism / Q000473:pathology; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation / Q000187:drug effects; D006367:HeLa Cells; D006801:Humans; D015603:Keratinocytes / Q000378:metabolism / Q000473:pathology; D008222:Lymphokines / Q000494:pharmacology; D024101:Mitochondrial Proteins / Q000235:genetics* / Q000378:metabolism; D020411:Oligonucleotide Array Sequence Analysis; D011565:Psoriasis / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D034622:RNA Interference; D062085:RNA, Long Noncoding; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D022661:RNA, Untranslated / Q000235:genetics*; D046509:Tissue Culture Techniques
D017931:DNA Primers; C468762:IFI6 protein, human; D008222:Lymphokines; D024101:Mitochondrial Proteins; C504070:PRINS RNA, human; D062085:RNA, Long Noncoding; D012333:RNA, Messenger; D022661:RNA, Untranslated