In Blum's hands he remains a transient figure, shoehorned into the story, one suspects, to tie the McNamara trial to the sexy culture of Hollywood.
Optical mapping of intracellular calcium demonstrated a physiological calcium transient (Figure 7B, 8B, S8 and Movie S4).
A time course (8, 12, and 24 h time points) experiment in MCF 10A cells demonstrated that the induction of DDX3 mRNA was transient (Figure 1a).
Based on the frequency of specific amino acids in the pool of viral quasispecies, we distinguished minor (Figure 2B, position 186), dominant (Figure 2B, position 114), complete (Figure 2B, position 370), and transient (Figure 2B, position 419) amino acid substitutions.
This effect was displayed as a miniscule caffeine-induced [Ca2+]i transient (Figure 5C, middle panel), that was completely omitted in the subsequent caffeine puff (n = 7; Figure 5C, lower panel).
The localized post-fusion increase in [Ca2+]c was transient (Figure 1B and 2D), the median half-time of the decrease in Fluo-4 fluorescence experiments was 3.2 s (interquartile range 2.1 6.5 s; n = 19).
For functional evaluation, cell lines expressing each construct (as indicated by their acquired resistance to hygromycin treatment following transfection) were evaluated for NAD degradation and their ability to support a TRPM2 dependent Ca2+ transient (Figure 3B).
Similarly to what was observed under control conditions (Figure 3D, left), caffeine puffs applied in the absence of bath Ca2+ (n = 6) induced an instantaneous rapid caffeine-induced [Ca2+]i transient (Figure 3D, right) displaying an amplitude similar to that observed under control conditions.
Consistent with in vitro results suggesting that its activity is about 90% reduced from WT PARP-1, the PARP-Y986H mutant resulted in both a detectable but significantly delayed time course of NAD degradation, and an increased latency TRPM2-dependent Ca2+ transient (Figure 3C, left and right panels).
