The opioid growth factor, [Met5]-enkephalin, is an inhibitory agent of cell proliferation and maturation that interacts with the zeta (zeta) opioid receptor to modulate growth. In order to learn more about this receptor, polyclonal and monoclonal antibodies were raised against binding subunits identified on two-dimensional gels by ligand blotting. Using Western blotting, the polyclonal antibodi...

Monoclonal antibodies to the capsular polysaccharide of Cryptococcus neoformans produce distinct capsular reactions and have biological activities that are determined by serotype specificity. In the present study, polyclonal rabbit anticapsular antibodies were cross-absorbed to produce serotype specificities similar to those of monoclonal antibodies. The results showed that polyclonal and monoc...

Antibodies bind other molecules strongly and specifically and are therefore useful as reagents in research, diagnosis and therapy. Antibodies taken from the blood of immunised animals are a mixture of different antibodies produced by different cells (they are described as polyclonal). Monoclonal antibodies are antibodies with a unique specificity, generally made by cloning cells containing a pa...

A recent study demonstrated that polyclonal antibodies to Rickettsia conorii and monoclonal antibodies to outer membrane proteins A (OmpA) and B (OmpB) provided effective, Fc-dependent, passive immunity, even in severe combined immunodeficient mice with an established infection. In order to determine the mechanism of protection, mouse endothelial and macrophage-like cell lines were infected wit...

Background: Lassa virus (LASV) can cause severe acute systemic infection in humans. No approved antiviral drugs or vaccines are currently available. Antibody-based therapeutics considered a promising treatment strategy the management of LASV disease. Methods: We used chimeric Ifnar−/− C57BL/6 (Ifnar−/− Bl6) mice, lethal mouse model, to evaluate protective efficacy polyclonal antibodies purified...

The performance of MabSelect SuRe and IgSelect affinity chromatography resins designed for process-scale purification of antibodies was investigated. Various antibodies (4 human monoclonal, 1 human polyclonal and 1 bovine polyclonal antibody and 1 Fc-fusion protein) were used to evaluate the elution pH and dynamic binding capacity of the resins. The elution pH for each human antibody was simila...