44 research outputs found
Microhardness and brittleness of solid solutions in the indium arsenide-gallium arsenide system
Microhardness testing procedure and effect of composition on the microhardness of brittle materials
A method of determining the rate of crystallization in zone melting with a temperature gradient
An Asymptotically Exact Analytical Solution for the Isotherm Based on the Gaussian Distribution on Adsorption Heat
Formation of atomically clean silicon surfaces in a low-energy low-pressure microwave plasma
Effect of Nature of Nonpolar Hydrocarbon Solvents on Adsorption Capacity of Synthetic Fatty Acids, Amines, and Amides
A method for the isolation and characterization of functional murine monoclonal antibodies by single B cell cloning
© 2017 Elsevier B.V. Monoclonal antibody technologies have enabled dramatic advances in immunology, the study of infectious disease, and modern medicine over the past 40 years. However, many monoclonal antibody discovery procedures are labor- and time-intensive, low efficiency, and expensive. Here we describe an optimized mAb discovery platform for the rapid and efficient isolation, cloning and characterization of monoclonal antibodies in murine systems. In this platform, antigen-binding splenic B cells from immunized mice are isolated by FACS and cocultured with CD40L positive cells to induce proliferation and mAb production. After 12 days of coculture, cell culture supernatants are screened for antigen, and IgG positivity and RNA is isolated for reverse-transcription. Positive-well cDNA is then amplified by PCR and the resulting amplicons can be cloned into ligation-independent expression vectors, which are then used directly to transfect HEK293 cells for recombinant antibody production. After 4 days of growth, conditioned medium can be screened using biolayer interferometry for antigen binding and affinity measurements. Using this method, we were able to isolate six unique, functional monoclonal antibodies against an antigen of the human malaria parasite Plasmodium falciparum. Importantly, this method incorporates several important advances that circumvent the need for single-cell PCR, restriction cloning, and large scale protein production, and can be applied to a wide array of protein antigens