2011
DOI: 10.1016/j.jim.2010.12.016
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A robust, high-throughput assay to determine the phagocytic activity of clinical antibody samples

Abstract: Phagocytosis can be induced via the engagement of Fcγ receptors by antibody-opsonized material. Furthermore, the efficiency of antibody-induced effector functions has been shown to be dramatically modulated by changes in antibody glycosylation. Because infection can modulate antibody glycans, which in turn modulate antibody functions, assays capable of determining the induction of effector functions rather than neutralization or titer provide a valuable opportunity to more fully characterize the quality of the… Show more

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Cited by 398 publications
(442 citation statements)
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“…To reduce inhibition due to NK cells alone, only KIR3DS1 -donor cells were used (31). A subset of antibody samples were treated with PNGaseF (New England Biolabs) to remove N-linked glycans, as previously described (32). The presence of inactivated PNGaseF did not affect the ADCVI assay results.…”
Section: Methodsmentioning
confidence: 99%
“…To reduce inhibition due to NK cells alone, only KIR3DS1 -donor cells were used (31). A subset of antibody samples were treated with PNGaseF (New England Biolabs) to remove N-linked glycans, as previously described (32). The presence of inactivated PNGaseF did not affect the ADCVI assay results.…”
Section: Methodsmentioning
confidence: 99%
“…ADCP activity was determined using a flow cytometric assay that measures the uptake of fluorescent gp120-coated beads by monocytic THP-1 cells in the presence of subject antibody. The antibodydependent phagocytosis assay was performed as previously described, with subject antibodies tested at a concentration of 6.25 g/ml (29,30). ADCC activity was characterized using the rapid fluorometric ADCC (RFADCC) assay with NK cells as effectors, as previously described (31).…”
Section: Methodsmentioning
confidence: 99%
“…Cells containing small concentrated fluorescent spots have positive scores, whereas cells showing little and diffuse fluorescence have negative scores. For the analysis of the proteins' nuclear internalization, we used an IDEAS software feature, the similarity score (SS) (22), to compare the similarity of the nuclear (DRAQ5/CyTRAK) and labeled-protein staining patterns. All events showing a positive SS were considered with high similarity between proteins and DRAQ5/CyTRAK, thus indicating a nuclear localization of the proteins.…”
Section: Methodsmentioning
confidence: 99%