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Title of Journal: Eur Food Res Technol

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Abbravation: European Food Research and Technology

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Springer-Verlag

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DOI

10.1007/bf02452620

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1438-2385

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Persistence and distribution of intravenously inje

Authors: Christer Røss Nielsen Arne HolstJensen Astrid Løvseth Knut G Berdal
Publish Date: 2005/09/17
Volume: 222, Issue: 3-4, Pages: 258-265
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Abstract

In a recent study it was reported that DNA could be taken up from the feed and transferred to the blood of Atlantic salmon Nielsen CR Berdal KG BakkeMcKellep AM HolstJensen A Eur Food Res Tech 2005 In the present study the transport in blood and accumulation in some organs of intravenously injected DNA was studied Intravenous injection was used as an alternative to feeding to ensure that the quantity of target DNA would permit a quantitative study of the distribution and degradation of the DNA in the fish Three DNA fragments of different length were administered by injection to 40 salmon each in a copy number of 1010 Blood and tissues were sampled at different time intervals after injection To ensure the use of a sensitive and reliable detection system realtime PCR methods with TaqMan chemistry were applied in this study Target DNA was observed in blood and all investigated tissues with peak levels observed at 05–1 h after injection Some tissue samples were positive for the target DNA up to 24 h after injection Results of the present study indicate that dietary DNA taken up in the blood may be transported to organs like liver and kidney as well as muscle and gonadsThis study was financially supported by a grant from the Research Council of Norway 142474/140 This is gratefully acknowledged We would also like to thank Marianne K Frøystad for invaluable assistance with intravenous injection on salmon and Einar Lilleeng for great assistance with tissue sampling

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