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Updated: May 3, 2026

In situ Subcellular Fractionation of Adherent and Non-adherent Mammalian Cells
Published on: July 23, 2010
The human papillomavirus (HPV) E6 oncoproteins promotes nuclear localization of active caspase 8
Joaquin Manzo-Merino1, Paola Massimi2, Marcela Lizano1
1Unidad de Investigación Biomédica en Cáncer, Instituto Nacional de Cancerología, México/Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México. Av. San Fernando No. 22, Col. Sección XVI, Tlalpan 14080, Mexico.
Abstract:
The HPV-16 E6 and E6(⁎) proteins have been shown previously to be capable of regulating caspase 8 activity. We now show that the capacity of E6 to interact with caspase 8 is common to diverse HPV types, being also seen with HPV-11 E6, HPV-18 E6 and HPV-18 E6(⁎). Unlike most E6-interacting partners, caspase 8 does not appear to be a major proteasomal target of E6, but instead E6 appears able to stimulate caspase 8 activation, without affecting the overall apoptotic activity. This would appear to be mediated in part by the ability of the HPV E6 oncoproteins to recruit active caspase 8 to the nucleus.
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