beta-Adrenergic agonist activity of a monoclonal anti-idiotypic antibody.

Development of a Novel Inhibitory Chimeric Anti-HER2 Monoclonal Antibody

Anti-antibody activity of a monoclonal macroglobulin.

A monoclonal macroglobulin from a patient with Waldenström macroglobulinemia has been shown to have antiglobulin activity of a new type, namely, that of a true anti-antibody. The protein reacts with human, primate, and rabbit IgM and IgG, only when the target immunoglobulin is complexed to an antigen. The implications of the general findings of antiglobulin activity of monoclonal proteins is di...

Anti-alprenolol anti-idiotypic antibodies bind to beta-adrenergic receptors and modulate catecholamine-sensitive adenylate cyclase.

Rabbit antibodies induced against alprenolol, a potent beta-adrenergic antagonist, bind to other antagonists, and, with less avidity, to catecholamine agonists. Anti-idiotypic antibodies were raised against the anti-alprenolol immunoglobulins. The anti-idiotypic antibodies specifically bind and agglutinate turkey erythrocytes; this is not observed for human agglutinate turkey erythrocytes; this...

Induction of neutralizing antibody in mice against poliovirus type II with monoclonal anti-idiotypic antibody.

Syngeneic monoclonal anti-idiotope antibody Ab2,2-17C3SCC was raised against an idiotope on a protective monoclonal antibody with specificity for poliovirus type II. Ab2,2-17C3SCC detects a paratope-related interspecies IdX. Ab2,2-17C3SCC purified from supernatant fluids of hybridoma cells by protein A-Sepharose was injected into 4- to 6-wk-old BALB/c mice. The sera of the mice were screened fo...

From agonist to antagonist: Fab fragments of an agonist-like monoclonal anti-beta(2)-adrenoceptor antibody behave as antagonists.

We previously demonstrated that the monoclonal antibody Mab6H8 raised against the second extracellular loop of the beta(2)-adrenoceptor (beta(2)-AR) had an agonist-like activity, mediated by the activation of L-type Ca(2+) channels by protein kinase A through the adenylyl cyclase pathway. We suggested that this Mab acts by stabilizing an active dimeric conformation of the beta(2)-AR. To substan...