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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Anal+Biochem 2010 ; 401 (2): 173-81 Nephropedia Template TP
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A Differential Cell Capture Assay for Evaluating Antibody Interactions with Cell Surface Targets #MMPMID20178770
Sherman DJ; Kenanova VE; Lepin EJ; McCabe KE; Kamei Ki; Ohashi M; Wang S; Tseng HR; Wu AM; Behrenbruch CP
Anal Biochem 2010[Jun]; 401 (2): 173-81 PMID20178770show ga
Many biological and biomedical laboratory assays require the use of antibodies and antibody fragments that strongly bind to their cell-surface targets. Conventional binding assays such as the enzyme-linked immunosorbent assay (ELISA) and flow cytometry have many challenges, including capital equipment requirements, labor intensiveness, and large reagent and sample consumption. Although these techniques are successful in mainstream biology, there is an unmet need for a tool to quickly ascertain the relative binding capabilities of antibodies/antibody fragments to cell-surface targets on the bench top at low cost. We describe a novel cell capture assay that enables several candidate antibodies to be evaluated quickly as to their relative binding efficacies to their cell-surface targets. We used chimeric rituximab and murine anti-CD20 monoclonal antibodies as cell capture agents on a functionalized microscope slide surface to assess their relative binding affinities based on how well they capture CD20-expressing mammalian cells. We found that these antibodies? concentration-dependent cell capture profiles correlate with their relative binding affinities. A key observation of this assay involved understanding how differences in capture surfaces affect the assay results. This approach can find utility when an antibody or antibody fragment against a known cell line needs to be selected for targeting studies.