کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2089291 1545786 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A high throughput electrochemiluminescent cell-binding assay for therapeutic anti-CD20 antibody selection
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیوتکنولوژی یا زیست‌فناوری
پیش نمایش صفحه اول مقاله
A high throughput electrochemiluminescent cell-binding assay for therapeutic anti-CD20 antibody selection
چکیده انگلیسی

A cell-based ELISA using suspension WIL2 cells in 96-well format was previously developed for measuring relative binding affinities of humanized anti-CD20 variants. We further developed a new cell-binding assay that uses high binding capacity carbon electrode plates for rapid attachment of suspension WIL2 cells and electrochemiluminescence for detection. Compared to the cell-based ELISA, which requires centrifugation for the manual wash steps, significant improvement in assay throughput was achieved by using a microplate washer. The assay can be performed on both 96- and 384-well plates with a standard curve range of 2.74–2000 ng/ml, which is wider than the range of 15.6–1000 ng/ml for the cell-based ELISA. Using CD20 expressing CHO cell clones, surface expression of ≥ 33,000 CD20 molecules was sufficient to obtain a dose–response curve in 384-well format. Relative affinities of 15 humanized variants correlated well (r2 = 0.94) between electrochemiluminescent cell-binding assay and cell-based ELISA. A competitive assay format, using mouse anti-CD20 antibody as the tracer, with a dose–response range of 27.4–20,000 ng/ml was also developed. The new cell-binding assay method can be used to efficiently support humanization process for selection of anti-CD20 antibody drug candidates and to characterize antibody binding to other cell surface proteins.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Immunological Methods - Volume 314, Issues 1–2, 31 July 2006, Pages 74–79
نویسندگان
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