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Mar. Drugs 2015, 13(6), 3732-3744; doi:10.3390/md13063732

Use of Natural Antimicrobial Peptides and Bacterial Biopolymers for Cultured Pearl Production

1
Ifremer, Centre de Brest, BP 70, 29280 Plouzané, France
2
Ifremer UMR 5244 IHPE, UPVD, CNRS, Université de Montpellier, CC 80, F-34095 Montpellier, France
3
Ifremer, UMR 241 EIO, UPF-ILM-IRD, Labex Corail, BP 7004, 98719 Taravao, French Polynesia
4
Faculty of Sciences, Biochemistry Department, Section III, Lebanese University, Tripoli, Lebanon
5
AiMB. 17 Rue d'Ouessant, 29280 Plouzané, France
*
Author to whom correspondence should be addressed.
Academic Editors: Peter Duggan and Kellie L. Tuck
Received: 5 March 2015 / Revised: 20 May 2015 / Accepted: 27 May 2015 / Published: 11 June 2015
(This article belongs to the Special Issue Marine Peptides and Their Mimetics)
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Abstract

Cultured pearls are the product of grafting and rearing of Pinctada margaritifera pearl oysters in their natural environment. Nucleus rejections and oyster mortality appear to result from bacterial infections or from an inappropriate grafting practice. To reduce the impact of bacterial infections, synthetic antibiotics have been applied during the grafting practice. However, the use of such antibiotics presents a number of problems associated with their incomplete biodegradability, limited efficacy in some cases, and an increased risk of selecting for antimicrobial resistant bacteria. We investigated the application of a marine antimicrobial peptide, tachyplesin, which is present in the Japanese horseshoe crab Tachypleus tridentatus, in combination with two marine bacterial exopolymers as alternative treatment agents. In field studies, the combination treatment resulted in a significant reduction in graft failures vs. untreated controls. The combination of tachyplesin (73 mg/L) with two bacterial exopolysaccharides (0.5% w/w) acting as filming agents, reduces graft-associated bacterial contamination. The survival data were similar to that reported for antibiotic treatments. These data suggest that non-antibiotic treatments of pearl oysters may provide an effective means of improving oyster survival following grafting procedures. View Full-Text
Keywords: pearl oyster; exopolysaccharide; tachyplesin; antimicrobial pearl oyster; exopolysaccharide; tachyplesin; antimicrobial
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Simon-Colin, C.; Gueguen, Y.; Bachere, E.; Kouzayha, A.; Saulnier, D.; Gayet, N.; Guezennec, J. Use of Natural Antimicrobial Peptides and Bacterial Biopolymers for Cultured Pearl Production. Mar. Drugs 2015, 13, 3732-3744.

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