25 The data were reported as fold increase in binding of the specific Ab over binding to nonspecific Ig.
Indeed, viral infections can deregulate immune response by subverting antibody (Ab) gene usage, leading to the overexpression of specific Ab subfamilies.
The supernatants were incubated with 2 μg/mL of specific Ab with constant agitation (overnight, 4 °C).
We showed recently that the increase of SNA binding to TF-specific Abs in cancer patients was not dependent on the stage of disease, histological type of tumor growth (diffuse, intestinal), or gender [ 36].
Indeed, our ELISA binding assay illustrated that even a 1-aa variation could impact the binding avidity of M2e-specific Abs with synthesized peptides.
Table 1 Estimates of the K i values determined in competitive real-time cell-binding experiments Displacement of specific [125I]-AB-MECA binding on CHO-K1-hA3R cells at ambient temperature in presence of different A3R antagonists with corresponding HPLClogD7.4 parameters.
To avoid non-specific binding of Abs to FcRγ ((fragment, crystallizable) receptor gamma), FACS buffer containing anti-mouse CD16/32 mAb (Mouse BD Fc Block™; 2.4G2, BD Biosciences) was added to all primary stains.
The value of the SNA binding to all TF-specific Abs and the ratio of SNA binding to TF-specific IgG, IgM, and IgA level (SNA/Ig index) were determined.
Membranes were blocked by adding 1 μg ml−1 anti-FcR Ab (R&D Systems) to prevent non-specific binding of the primary Ab, and further incubated with 1 μg ml−1 pure mouse anti-human VEGFR-2 Ab (R&D Systems) overnight at 4 °C.
A549 and A431 cells: Cellular immunofluorescence representing the binding of the respective phospho-specific Abs as well as the blue emission of DAPI stained DNA was measured with an LSC (iCys; CompuCyte, Westwood, MA) utilizing standard filter settings; fluorescence was excited with 488-nm argon, helium-neon (633 nm) and violet (405 nm) lasers [ 76].
