“…Using this strategy, more than 100 individual CD38+ cells were rapidly isolated from sections of an SSPE brain and analyzed for individually expressed IgG antibodies (Burgoon et al, PNAS, in press). Immunostaining protocols before LCM must be conducted quickly to preserve RNA (Fend et al, 1999;Burgess and McParland, 2002;Mojsilovic-Petrovic et al, 2004). However, since LCM was first described, few studies have examined RNA expression in individual cells from human post-mortem CNS (Bahn et al, 2001;Lu et al, 2004), likely reflecting the challenge of isolating single cells from a complex tissue and the subsequent purification of 10-20 pg of total RNA from each cell for analysis (Michel et al, 2003;Parlato et al, 2002).…”