The herpes simplex virus-induced demise of keratinocytes is associated with a dysregulated pattern of p63 expression.
p63 plays a pivotal role in the development and maintenance of stratified epithelial tissues. In an effort to gain insight into the pathogenic mechanisms of skin infections caused by HSV-1 and HSV-2, we determined the patterns of p63 expression in primary keratinocytes and in the HaCaT cell line. The levels of DeltaNp63alpha and a 50kDa p73 isoform were decreased, Bax-alpha remained unaffected, while the expressions of the Bax-beta, TAp63gamma and a 44.5kDa p73 isoform were highly increased in both HSV-1-infected HaCaT cells and primary keratinocytes. In contrast, in response to HSV-2 infection the levels of DeltaNp63alpha, a 50kDa p73 isoform and a 44.5kDa p73 protein were decreased, Bax-alpha and TAp63gamma remained unaffected, while the expression of Bax-beta was slightly increased. The knockdown of TAp63 expression enhanced the viability of HSV-1-infected cells. Thus, HSV-1 and HSV-2 modulate the patterns of p63 and Bax expression in a serotype-specific manner. The dysregulated pattern of p63 expression observed in HSV-infected keratinocytes may comprise part of a mechanism by which these viruses perturb the functions of keratinocytes and lead to their demise.
Department of Medical Microbiology and Immunobiology, University of Szeged, Dóm tér 10, H-6720 Szeged, Hungary. megyeri@comser.szote.u-szeged.hu
Klára
K
Megyeri
László
L
Orosz
Bernadett
B
Kormos
Katalin
K
Pásztor
György
G
Seprényi
Imre
I
Ocsovszki
Yvette
Y
Mándi
Zsuzsanna
Z
Bata-Csörgo
Lajos
L
Kemény
D017209:Apoptosis; D002460:Cell Line; D002470:Cell Survival; D004268:DNA-Binding Proteins / Q000378:metabolism; D018259:Herpesvirus 1, Human / Q000378:metabolism / Q000502:physiology*; D018258:Herpesvirus 2, Human / Q000378:metabolism / Q000502:physiology*; D006801:Humans; D015603:Keratinocytes / Q000378:metabolism / Q000821:virology*; D008565:Membrane Proteins / Q000235:genetics* / Q000378:metabolism; D009687:Nuclear Proteins / Q000378:metabolism; D015534:Trans-Activators / Q000235:genetics / Q000378:metabolism; D014157:Transcription Factors; D000072160:Tumor Protein p73; D025521:Tumor Suppressor Proteins / Q000235:genetics / Q000378:metabolism; D014779:Virus Replication; D051028:bcl-2-Associated X Protein / Q000378:metabolism
C494826:BAX protein, human; C081876:CKAP4 protein, human; D004268:DNA-Binding Proteins; D008565:Membrane Proteins; D009687:Nuclear Proteins; C115051:TP63 protein, human; C000606460:TP73 protein, human; D015534:Trans-Activators; D014157:Transcription Factors; D000072160:Tumor Protein p73; D025521:Tumor Suppressor Proteins; D051028:bcl-2-Associated X Protein