Echinoderm toxins—II. Animalizing action in sea urchin development
| Autor: | George D. Ruggieri |
|---|---|
| Rok vydání: | 1965 |
| Předmět: |
Male
Zoology Pisaster brevispinus Asterias forbesi In Vitro Techniques Toxicology chemistry.chemical_compound Arbacia punctulata biology.animal Sea urchin Ovum Toxins Biological biology Tissue Extracts urogenital system Pisaster Holothurin Saponins biology.organism_classification Spermatozoa Fishery chemistry Echinoderm embryonic structures Female Tube feet Echinodermata |
| Zdroj: | Toxicon. 3:157-160 |
| ISSN: | 0041-0101 |
| DOI: | 10.1016/0041-0101(65)90009-7 |
| Popis: | Lyophilized extracts of the whole sea stars, Pisaster ochraceous , Pisaster brevispinus , and Asterias forbesi , and extracts of the tube feet of Asterias forbesi , were tested for their effects on sperm motility, and unfertilized and fertilized eggs of the sea urchin, Arbacia punctulata . The effects of these toxins were compared with those previously reported for holothurin, from the Bahamian sea cucumber, Actinopyga agassizi , for the extracts of the Pacific sunburst sea star, Pycnopodia helianthoides , and for the red webbed sea star, Patiria miniata . Sperms were immobilized and unfertilized eggs severely cytolyzed at relatively weak concentrations. Developmental modifications, characterized as animalization (ectodermization) were obtained with all of the toxins tested. The high surface activities, structural configuration, and the presence of sugars and sulfate in these toxins contribute to their solubility, penetrability, and affinity for cellular constituents. These properties undoubtedly play important roles in provoking animalization in the developing sea urchin. |
| Databáze: | OpenAIRE |
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