Winkelbach, Anja, Schade, Rüdiger, Schulz, Carsten and Wuertz, Sven (2015) Comparison of oral, rectal and intraperitoneal administration of IgY antibodies in passive immunization of rainbow trout (Oncorhynchus mykiss). Aquaculture International, 23 (2). pp. 427-438. DOI 10.1007/s10499-014-9823-1.

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Abstract

IgY antibodies serve an interesting opportunity for drug administration and passive immunization. For routine application in aquaculture, oral delivery needs to be established. Two feeding trials with non-specific IgY antibodies were conducted in juvenile trout to assess IgY uptake through the intestinal wall and to identify target tissue of IgY. In experiment 1, a positive control that received the lowest effective dose by intraperitoneal injection (0.0076 mg IgY g BW−1 day−1) was compared with three groups fed a 10-, 50- and 75-fold dosage and a negative control. After 12, 24 and 36 h, plasma IgY concentrations of all treatments were below the detection threshold. In experiment 2, an excessive oral administration (200-fold) was compared with two groups that received IgY rectally at 75- and 150-fold dosage of the injected control. Blood samples taken 2, 4, 6, 12 and 24 h did not result in detectable IgY concentrations, suggesting that neither the increased oral dosage nor the bypassing of the stomach improved IgY uptake. In both experiments, only intraperitoneal injection resulted in IgY uptake, revealing a decrease from 40.33 ± 21.72 µg ml−1 after 12 h to 19.48 ± 12.67 µg ml−1 at 36 h in experiment 1 and a peak at 75.58 ± 23.75 µg ml−1 after 2 h in experiment 2. Immunohistochemistry was carried out to localize IgY in selected target tissues of IgY action. Staining revealed IgY in the liver but not in white muscle, pituitary and brain, irrespective from the time point measured.

Document Type:	Article
Keywords:	Growth IgY antibody Immunohistochemistry Passive immunization Oral vaccination Rainbow trout
Research affiliation:	Kiel University Kiel University > Kiel Marine Science OceanRep > The Future Ocean - Cluster of Excellence OceanRep > The Future Ocean - Cluster of Excellence > FO-R04
Refereed:	Yes
Open Access Journal?:	No
Publisher:	American Medical Association
Projects:	Future Ocean
Date Deposited:	30 Jan 2017 10:20
Last Modified:	23 Sep 2019 21:26
URI:	https://oceanrep.geomar.de/id/eprint/35765

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