title: Identification of systemic immune response markers through metabolomic profiling of plasma from calves given an intra-nasally delivered respiratory vaccine.
abstract: Vaccination procedures within the cattle industry are important disease control tools to minimize economic and welfare burdens associated with respiratory pathogens. However, new vaccine, antigen and carrier technologies are required to combat emerging viral strains and enhance the efficacy of respiratory vaccines, particularly at the point of pathogen entry. New technologies, specifically metabolomic profiling, could be applied to identify metabolite immune-correlates representative of immune protection following vaccination aiding in the design and screening of vaccine candidates. This study for the first time demonstrates the ability of untargeted UPLC-MS metabolomic profiling to identify metabolite immune correlates characteristic of immune responses following mucosal vaccination in calves. Male Holstein Friesian calves were vaccinated with Pfizer Rispoval® PI3 + RSV intranasal vaccine and metabolomic profiling of post-vaccination plasma revealed 12 metabolites whose peak intensities differed significantly from controls. Plasma levels of glycocholic acid, N-[(3α,5β,12α)-3,12-Dihydroxy-7,24-dioxocholan-24-yl]glycine, uric acid and biliverdin were found to be significantly elevated in vaccinated animals following secondary vaccine administration, whereas hippuric acid significantly decreased. In contrast, significant upregulation of taurodeoxycholic acid and propionylcarnitine levels were confined to primary vaccine administration. Assessment of such metabolite markers may provide greater information on the immune pathways stimulated from vaccine formulations and benchmarking early metabolomic responses to highly immunogenic vaccine formulations could provide a means for rapidly assessing new vaccine formulations. Furthermore, the identification of metabolic systemic immune response markers which relate to specific cell signaling pathways of the immune system could allow for targeted vaccine design to stimulate key pathways which can be assessed at the metabolic level.
authors.forename: Darren W
authors.initials: DW
authors.lastname: Gray
authors.forename: Michael D
authors.initials: MD
authors.lastname: Welsh
authors.forename: Simon
authors.initials: S
authors.lastname: Doherty
authors.forename: Fawad
authors.initials: F
authors.lastname: Mansoor
authors.forename: Olivier P
authors.initials: OP
authors.lastname: Chevallier
authors.forename: Christopher T
authors.initials: CT
authors.lastname: Elliott
authors.forename: Mark H
authors.initials: MH
authors.lastname: Mooney
mesh_terms: D000281:Administration, Intranasal / Q000662:veterinary; D000818:Animals; D000914:Antibodies, Viral / Q000097:blood; D015415:Biomarkers / Q000097:blood; D002417:Cattle; D002418:Cattle Diseases / Q000276:immunology* / Q000821:virology; D002853:Chromatography, Liquid / Q000662:veterinary; D007113:Immunity, Innate; D008297:Male; D013058:Mass Spectrometry / Q000662:veterinary; D055442:Metabolome; D029101:Parainfluenza Virus 3, Bovine / Q000276:immunology*; D018357:Respiratory Syncytial Virus Infections / Q000276:immunology / Q000662:veterinary* / Q000821:virology; D018112:Respiratory Syncytial Virus, Bovine / Q000276:immunology*; D010253:Respirovirus Infections / Q000276:immunology / Q000662:veterinary* / Q000821:virology; D014765:Viral Vaccines / Q000276:immunology*
chemical_list: D000914:Antibodies, Viral; D015415:Biomarkers; D014765:Viral Vaccines
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