Abstract
Jellyfish have an increasing impact on marine ecology. Cnidocysts bearing stinging cells afford, amongst others, prey capture and defence. Several different types of stinging capsules are found in one species and they are supposed to have specific functions, e.g. paralysing prey or adhering to it. Due to these assumed different roles of the capsules, it is suggested that toxins, which are contained in the capsules, differ in composition. Analysis of distinct types of nematocysts requires an appropriate method for the separation of the different types. Mixtures of types of nematocysts were obtained of two species of jellyfish, Aurelia aurita and Cyanea lamarckii, by maceration of the tissue. These mixtures were treated with a method called laser microdissection and pressure catapulting (LMPC). Optimized maceration methods, which were firstly introduced as a method for this purpose, in conjunction with optimized LMPC parameters lead to sufficient amounts of separated capsules of individual types for subsequent mass-spectrometric analyses. In case of A. aurita, the resulting mass spectra had some constituents in common, whereas in the overall pattern, the two distinct nematocyst types differed.
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Abbreviations
- a. u:
-
Arbitrary units
- CD:
-
Collection drop
- DAS:
-
Dishwashing agent solution
- DW:
-
Distilled water
- LE:
-
Laser energy
- LMPC:
-
Laser microdissection and pressure catapulting
- MALDI-TOF-MS:
-
Matrix-assisted laser desorption ionization time-of-flight mass spectrometry
- OG:
-
Octyl-β-d-glucopyranoside
- SA:
-
Sinapinic acid (4-Hydroxy-3.5-dimethoxy-cinnamic acid)
- SDS:
-
Sodium dodecyl sulphate
- TFA:
-
Trifluoroacetic acid
- U/mg:
-
Units per milligrams
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Acknowledgements
We thank PD Dr. Gerhard Jarms (University of Hamburg, Department for Biology, Section: Functional Morphology) for paper correction and his support with polyp cultivation and maintenance. We are grateful to Dr. Jürgen Gandraß (GKSS Research Centre Geesthacht, Institute for Costal Research, Department for Marine Bioanalytical Chemistry) for critically reading the manuscript.
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Wiebring, A., Helmholz, H., Sötje, I. et al. A New Method for the Separation of Different Types of Nematocysts from Scyphozoa and Investigation of Proteinaceous Toxins Utilizing Laser Catapulting and Subsequent Mass Spectrometry. Mar Biotechnol 12, 308–317 (2010). https://doi.org/10.1007/s10126-010-9261-7
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DOI: https://doi.org/10.1007/s10126-010-9261-7