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Title: Immunogenicity of iron-regulated outer membrane proteins of Pasteurella multocida B:2 in mice model
Authors: Kharb, Subhash
Charan, Shiv
Keywords: Iron-regulated proteins
Outer membrane proteins
Pasteurella multocida B:2
Issue Date: Dec-2010
Publisher: NISCAIR-CSIR, India
Abstract: The present study was conducted to investigate the role of iron-regulated outer membrane proteins (IROMP) of Pasteurella multocida B:2 in mice as potential immunogens. Outer membrane proteins extracted from P. multocida B:2 grown under normal (OMP) and iron-deficient (IROMP) conditions were subjected to discontinuous SDS-PAGE. Nine polypeptides of MW ranging from 85.1 to 16.7 kDa from OMP preparations and two additional polypeptides of MW 95.4 and 89.1 kDa from IROMP preparations were observed with bands of MW 37.2 and 34.7 kDa as major proteins. Mice were immunized twice with OMP, IROMP-enriched fractions and whole cell lysate (WCL) via subcutaneous route at day 0 and 21. Antibody titers were determined from sera collected at weekly interval and protection was studied against challenge using 102 cfu of P. multocida two weeks after secondary immunization via intranasal and subcutaneous routes. IROMP and OMP immunized mice provoked significant antibody responses and IROMP induced higher antibody responses. IROMP and OMP immunized mice showed protection (100%) upon intranasal challenge and a protection (84%) following subcutaneous challenge as compared to high mortality (84%) in control mice. These results indicate that OMP enriched with IROMP fractions can be superior means of immunization
Description: 1181-1187
ISSN: 0975-1009 (Online); 0019-5189 (Print)
Appears in Collections:IJEB Vol.48(12) [December 2010]

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