Zhu, Jingyi and Lee, Wai Hin and Yip, Ki Chun and Wu, Zhen and Wu, Jiajun and Leaw, Chui Pin and Lim, Po Teen and Lu, Chung Kuang and Chan, Leo Lai (2023) Regional comparison on ciguatoxicity, hemolytic activity, and toxin profile of the dinoflagellate Gambierdiscus from Kiribati and Malaysia. SCIENCE OF THE TOTAL ENVIRONMENT, 872.
Full text not available from this repository.Abstract
The dinoflagellates Gambierdiscus and Fukuyoa can produce Ciguatoxins (CTXs) and Maitotoxins (MTXs) that lead to ciguatera poisoning (CP). The CP hotspots, however, do not directly relate to the occurrence of the ciguatoxic Gambierdiscus and Fukuyoa. Species-wide investigations often showed no association between CTX level and the molecular identity of the dinoflagellates. In the Pacific region, Kiribati is known as a CP hotspot, while Malaysia has only three CP outbreaks reported thus far. Although ciguatoxic strains of Gambierdiscus were isolated from both Kiribati and Malaysia, no solid evidence on the contribution of ciguatoxic strains to the incidence of CP outbreak was recorded. The present study aims to investigate the regional differences in CP risks through region-specific toxicological assessment of Gambierdiscus and Fukuyoa. A total of 19 strains of Gambierdiscus and a strain of Fukuyoa were analyzed by cytotoxicity assay of the neuro-2a cell line, hemolytic assay of fish erythrocytes, and high-resolution mass spectrometry. Gambierdiscus from both Kiribati and Malaysia showed detectable ciguatoxicity; however, the Kiribati strains were more hemolytic. Putative 44-methylgambierone was identified as part of the contributors to the hemolytic activity, and other unknown hydrophilic toxins produced can be potentially linked to higher CP incidence in Kiribati.
| Item Type: | Article |
|---|---|
| Funders: | UNSPECIFIED |
| Uncontrolled Keywords: | Gambierdiscus; Ciguatoxins; Kiribati; Malaysia; 44-Methylgambierone |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 11 Jun 2024 01:58 |
| Last Modified: | 11 Jun 2024 01:58 |
| URI: | http://eprints.um.edu.my/id/eprint/38610 |
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