Immunisation with a plasmid DNA vaccine encoding gonadotrophin releasing hormone (GnRH-I) and T-helper epitopes in saline suppresses rodent fertility

Muhammad A.H. Khan, Kazuhide Ogita, V.A. Ferro, Keiichi Kumasawa, Takeki Tsutsui, Tadashi Kimura

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Research into active immunisation against gonadotrophin releasing hormone (GnRH-I) has gained widespread acceptance as a means of controlling reproduction and behaviour of farm, companion and wild animals. Many studies describe the use of multiple copies of the self-peptide in linear alignment and conjugation with a large carrier protein to increase the immune response to the peptide. However, problems resulting from carrier protein epitope suppression have seen a diversion of interest into the use of genetic materials to elicit an optimum immune response. In this study, a 533-bp long DNA vaccine was constructed in pcDNAV5-HisB coding for 18.871 kDa GnRH-I-T-helper-V5 epitopes fusion protein. COS1 cells transfected with the vaccine construct were found to release fusion protein into culture supernatant. The vaccine construct (100 μg/mice) in saline solution administered into the anterior quadriceps muscle of ICR male and female mice stimulated antigen-specific IgG antibody responses. Testosterone levels in the vaccinated male mice were significantly (p = 0.021) reduced. A significant reduction in uterine implants were noted following mating between immunised males and control females (p = 0.028), as well as between immunised females and control males (p = 0.004). Histological examination of both the male and female gonads in study week 13 showed atrophy of the seminiferous epithelium and suppression of folliculogenesis.
LanguageEnglish
Pages1365-1374
Number of pages10
JournalVaccine
Volume26
Issue number10
DOIs
Publication statusPublished - 4 Mar 2008

Fingerprint

DNA Vaccines
recombinant vaccines
gonadotropin-releasing hormone
Gonadotropin-Releasing Hormone
epitopes
Fertility
Epitopes
Rodentia
Immunization
plasmids
immunization
Plasmids
rodents
transport proteins
mice
Carrier Proteins
Vaccines
immune response
peptides
vaccines

Keywords

  • GnRH-I vaccine
  • saline-mediated immunisation
  • in vivo fertility
  • pharmacology

Cite this

Khan, Muhammad A.H. ; Ogita, Kazuhide ; Ferro, V.A. ; Kumasawa, Keiichi ; Tsutsui, Takeki ; Kimura, Tadashi. / Immunisation with a plasmid DNA vaccine encoding gonadotrophin releasing hormone (GnRH-I) and T-helper epitopes in saline suppresses rodent fertility. In: Vaccine. 2008 ; Vol. 26, No. 10. pp. 1365-1374.
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Immunisation with a plasmid DNA vaccine encoding gonadotrophin releasing hormone (GnRH-I) and T-helper epitopes in saline suppresses rodent fertility. / Khan, Muhammad A.H.; Ogita, Kazuhide; Ferro, V.A.; Kumasawa, Keiichi; Tsutsui, Takeki; Kimura, Tadashi.

In: Vaccine, Vol. 26, No. 10, 04.03.2008, p. 1365-1374.

Research output: Contribution to journalArticle

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