Co-staining of Qβ particles with either rhodamine-phalloidin or an anti-Lamp1 antibody showed the integrin-targeted T93 PEG cRGD@init particles largely colocalized with endolysosomal compartments, consistent with the expected receptor-mediated mechanism.
Interestingly, we observed gradient detection in the 0 to 1000 nM gradient even at the high end (close to 1 µM) where we expect receptors at both the front and back of the cell to be almost completely bound with ligand.
As expected, P2X7 receptor but not P2X4 receptor, was fully required for Nlrp3 activation in response to high ATP concentrations.
RT-PCR for the D4 receptor in rat thoracic aorta and A10 cells showed the expected D4 receptor size of 367 bp.
As expected, anchored receptor blocked signalling but to our surprise we found that the anchored ligand also blocked receptor signalling and internalization.
Both complexes efficiently internalized in A431-CCK-2R A431-CCK-2R A431-CCK-2Rion at 37 °cellsowing afteror, 4% portion of radioactivity bound on the cell membrane, as expected for receptor agonists, with high internalization (over 70%) (Table 1).
As expected, ALX receptor (or FPR2) was up-regulated, showing a fold change of 1.55.
As expected, insulin receptor phosphorylation was significantly decreased in the cells over-expressing human ENPP1 (Figure 4, Panel A).
The extracellular sequence of CD81 lacks the consensus N-glycosylation motif, Asn-xxx-Ser/Thr, thus as expected, the receptor expressed in the HEK293S-TetR stable cell line did not appear N-glycosylated because its migration on SDS-PAGE was unaltered even after treatment with N-glycanase PNGaseF (Fig 2B).
As would be expected, DOP receptor agonist-induced trafficking was absent when DELT and SNC80 were co-administered with SDM-25N.
