The study of viruses necessarily involves dissecting the intimate
details of cellular pathways. Viruses have often been employed as tools
in studying cellular pathways, as was done by early retrovirologists
such as Peyton Rous in attempting to understand the mechanism of
cellular transformation and oncogenesis. On the other side of the coin,
virologists seek to de?ne those cellular elements interacting
intimatelywiththeir virus ofinterestinorder to better understand viral
replication itself, and in some cases to develop antiviral strategies.
It is in the intersection of virology and cell biology that many of us
?nd the most rewarding aspects of our research. When a new discovery
yields insights into basic cellular mechanisms and presents new targets
for int- vention to ?ght a serious pathogen, the impact can be high and
the excitement intense. HIV has been no exception to the rule that
viruses reveal many basic aspects of cellular biology. In recent years,
in part because of the importance of HIV as a major cause of human
suffering, numerous cellular processes have been elucidated through work
on processes or proteins of this human retrovirus. The excitement in
this ?eld is especially well illustrated by the discovery of new innate
means of resisting viral replication, such as the work on APOBEC3G,
TRIM5a, and BST-2/ tetherin presented in this volume.