Journal
TOXICON
Volume 104, Issue -, Pages 46-51Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.toxicon.2015.07.335
Keywords
Yongeichthys criniger; TTX-producing bacteria; Tetrodotoxin; Enterobacter cloaca; Rahnella aquatilis; Goby
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Funding
- National Science Founding of China [41176108]
- Shanghai Municipal Education Commission [14ZZ145]
- Pujiang Foundation from Science and Technology Commission of Shanghai Municipality [11PJ1404400]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
- Shanghai Universities First-class Disciplines Project of Fisheries from Shanghai Municipal Education Commission
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Toxic goby fish (Yongeichthys criniger) containing tetrodotoxin (TTX), from Zhanjiang, Guangdong province, China, were screened for TTX-producing bacteria. Two toxic bacterial strains were isolated from the liver of Y. criniger and respectively denoted XC-3 and XL-1. TTX production by the strains was confirmed by mouse bioassay, enzyme-linked immunosorbent assay and high performance liquid chromatography coupled with mass spectrometry. Based on morphological, physiological and biochemical characteristics and 16S rDNA phylogenetic analysis, strain XL-3 was identified as Enterobacter cloaca and XL-1 was closely related to Rahnella aquatilis. These findings show for the first time that TTX-producing bacteria are symbiotic bacteria in goby and suggest that bacterial strains are at least partially responsible for TTX accumulation in Y. criniger. (C) 2015 Elsevier Ltd. All rights reserved.
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