IMMUNE RESPONSES AGAINST CHIMERIC DNA AND PROTEIN VACCINES COMPOSED OF PLPEN-OMPH AND PLPEC-OMPH FROM PASTEURELLA MULTOCIDA A:3 IN MICE


Okay S., Ozcengiz E., ÖZCENGİZ G.

ACTA MICROBIOLOGICA ET IMMUNOLOGICA HUNGARICA, vol.59, no.4, pp.485-498, 2012 (Peer-Reviewed Journal) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 59 Issue: 4
  • Publication Date: 2012
  • Doi Number: 10.1556/amicr.59.2012.4.6
  • Journal Name: ACTA MICROBIOLOGICA ET IMMUNOLOGICA HUNGARICA
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.485-498

Abstract

Pasteurella multocida is a pathogenic bacterium causing many diseases that are of significant economic importance to livestock industries. Outer membrane protein H (ompH) gene and two fragments of Pasteurella lipoprotein E (plpE) gene, namely plpEN and plpEC, were cloned from P. multocida A:3. Three DNA vaccine formulations, namely pCMV-ompH, pCMV-plpEN-ompH and pCMV-plpEC-ompH and two protein-based prototype vaccines, alum adjuvanted PlpEN-OmpH and PlpEC-OmpH, were generated. Antibody levels were induced in mice vaccinated with chimeric DNA or protein vaccines. A significant (p<0.05) increase in serum IFN-gamma titer was obtained by vaccination with 100 mu g of pCMV-ompH, pCMV-plpEC-ompH and PlpEC-OmpH. DNA vaccines did not provide protection upon intraperitoneal challenge with 10 LD50 of live P. multocida A: 3. However, 40% protection was conferred by 100 mu g of PlpEC-OmpH which was not statistically significant. These results showed that plpEN-ompH and plpEC-ompH chimeric DNA vaccines and alum adjuvanted PlpEN-OmpH or PlpEC-OmpH protein vaccines were immunogenic but not protective against P. multocida A: 3 in mice. Prime-boost strategies, i.e. priming with DNA vaccines and boost with protein formulations or different adjuvants can be utilized to obtain significant protection.