Bovine monoclonal anti-idiotypes induce antibodies specific for a synthetic peptide bearing a neutralizing epitope of bovine herpesvirus 1 glycoprotein gI (gB)
1991
Hariharan, K. | Hariharan, M.J. | Zamb, T.J. | Krueger, R.J. | Srikumaran, S.
Bovine monoclonal anti-Id mimicking a neutralizing epitope of bovine herpesvirus-1 (BHV-1) glycoprotein gI were developed. An epitope present on the 74K subunit of gI identified by a murine mAb 1E11 was selected for this study. Bovine lymphocytes from the prefemoral lymph node of a heifer immunized with mAb 1E11 were fused with SP-2/0, a nonsecreting murine cell-line. Two bovine x murine hybridomas secreting bovine monoclonal anti- Id specific for the Id of 1E11 were stabilized. These anti-Id inhibited the binding of 1E11 to purified glycoprotein gI in a dose-dependent fashion. Naive mice immunized with the anti-Id produced anti-anti- Id (Ab3) that reacted with BHV-1 glycoprotein gI in a RIA, and neutralized BHV-1 infection in vitro. The Ab3 also showed reactivity to the 74K subunit of authentic gI glycoprotein in a Western blot analysis, and to the synthetic peptide bearing the 1E11 epitope in a RIA. These results substantiate the presence of the population of anti-Ab2 that functionally resemble antibodies specific for the immunizing Ag BHV-1 in Ab3, and demonstrate the ability of these anti-Id to elicit BHV-1-specific antibody response.
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