Atlantic salmon (Salmo salar L.) serum vitellogenin neutralises infectivity of infectious pancreatic necrosis virus (IPNV).
Vitellogenin is a phosphoglycoprotein which represents the main precursor of the egg yolk in teleost fish. This reproductive protein was also demonstrated to play an important role in innate immunity by acting as a pattern recognition molecule capable of binding to bacteria, fungi and enhancing macrophage phagocytosis. The presented results demonstrate that, egg homogenate, ovarian fluid and serum of mature female Atlantic salmon have high neutralising ability for infectious pancreatic necrosis virus (IPNV). Vitellogenin from mature female Atlantic salmon serum, purified by immuno-affinity on a column matrix coated with monoclonal anti-Atlantic salmon vitellogenin antibody, was able to neutralise between 9.1 x 10(4) and 3.09 x 10(5) TCID(50) IPNV mg(-1) of protein. To the author's knowledge, this is the first time that the neutralising activity of vitellogenin on a teleost virus has been demonstrated. The results may explain why IPNV is difficult to detect by culture methods in ovarian fluid and egg homogenates from carrier mature females and suggest a possible means of vertical transmission via the egg.
Garcia
Jose
J
Facultad de Veterinaria, Universidad Complutense de Madrid, Avda. Puerta de Hierro s/n, 28040-Madrid, Spain.
Munro
Eann S
ES
Monte
Milena M
MM
Fourrier
Mickael C S
MC
Whitelaw
Jason
J
Smail
David A
DA
Ellis
Anthony E
AE
D000818:Animals; D000998:Antiviral Agents / Q000302:isolation & purification / Q000494:pharmacology; D018175:Birnaviridae Infections / Q000662:veterinary / Q000821:virology; D002460:Cell Line; D005260:Female; D005393:Fish Diseases / Q000821:virology; D018061:Infectious pancreatic necrosis virus / Q000187:drug effects*; D020317:Salmo salar; D014819:Vitellogenins / Q000302:isolation & purification / Q000494:pharmacology*
D000998:Antiviral Agents; D014819:Vitellogenins