Abstract
There has been an explosion in the number of papillomaviruses that have
been identified and fully sequenced. Yet only a minute fraction of these
has been studied in any detail. Most of our research efforts have
focused on the E6 and E7 proteins of “high-risk”, cancer-associated
human papillomaviruses (HPVs). Interactions of the high-risk HPV E6 and
E7 proteins with cellular targets, the p53 and the retinoblastoma tumor
suppressors have been investigated in minute detail. Some have thus
questioned if research on papillomaviruses remains an exciting and
worthwhile area of investigation. However, fundamentally new insights on
the biological activities and cellular targets of the high-risk HPV E6
and E7 proteins have been discovered and previously unstudied HPVs have
been associated with human diseases. HPV infections continue to be an
important cause of human morbidity and mortality and since there are no
antivirals to combat HPV infections, research on HPVs should remain
attractive to new investigators and biomedical funding agencies, alike.