Comment by Hyoung-gon Lee, Xiongwei Zhu, Xinglong Wang,
Rudy J. Castellani, George Perry, and Mark A. Smith
Cancer, Alzheimer Disease, and Cardiovascular Disease:
Associations and Disassociations—Clues to Etiology?
There are numerous pathological similarities between cancer and Alzheimer disease (AD), including, but not limited to, loss of cell cycle control (McShea et al., 1997), DNA instability/replication (Bajic et al., 2008; Spremo-Potparevic et al., 2008; Zhu et al., 2008; Bajic et al., 2009), abnormal proliferative signal transduction pathways (McShea et al., 1999; Perry et al., 1999), and avoidance of apoptosis (Raina et al., 2001; Zhu et al., 2006). Additionally, it is notable that numerous features of AD follow the oncogenic stimulation of neurons either in vitro (McShea et al., 2007) or in vivo (Lee et al., 2009a). Given such striking similarities, it is perhaps surprising that AD is associated with a reduced risk of cancer and, likewise, that cancer was associated with a reduced risk of AD (Roe et al., 2010). However, since it is clear that the...