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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 105, No. 3, 2010, pp. 269-277
Bioline Code: oc10046
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 105, No. 3, 2010, pp. 269-277

 en Vaccinia virus regulates expression of p21WAF1/Cip1 in A431 cells
Andrade, Anderson A.; Brasil, Bruno S.A.F.; Pereira, Anna C.T.C.; Ferreira, Paulo C.P.; Kroon, Erna G. & Bonjardim, Cláudio A.


In this paper, we provide evidence that both the mRNA and protein levels of the cyclin-dependent kinase (CDK) inhibitor p21WAF1/CDK-interacting protein 1 (Cip1) increase upon infection of A431 cells with Vaccinia virus (VACV). In addition, the VACV growth factor (VGF) seems to be required for the gene expression because infection carried out with the mutant virus VACV-VGF- revealed that this strain was unable to stimulate its transcription. Our findings are also consistent with the notion that the VGF-mediated change in p21WAF1/Cip1 expression is dependent on tyrosine kinase pathway(s) and is partially dependent on mitogen-activated protein kinase/extracellular-signal regulated kinase 1/2. We believe that these pathways are biologically significant because VACV replication and dissemination was drastically affected when the infection was carried out in the presence of the relevant pharmacological inhibitors.

Vaccinia virus, virus-host cell interaction, p21WAF1/Cip1, MEK/ERK1/2, signal transduction

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