engleski

Hormetic effects of cerium, lanthanum and their combination at sub-micromolar concentrations in sea urchin sperm

Rare earth elements (REEs) cerium and lanthanum and their combination were tested across a concentration range, from toxic (10-4 to 10-5 M) to lower concentrations (10-6 to 10-8 M) for their effects on sea urchin (Sphaerechinus granularis) sperm. A significantly decreased fertilization rate (FR) was found for sperm exposed to 10-5 M Ce, La and their combination, opposed to a significant increase of FR following 10-7 and 10-8 M REE sperm exposure. The offspring of REE-exposed sperm showed significantly increased developmental defects following sperm exposure to 10-5 M REEs vs. untreated controls, while sperm exposure to 10-7 and 10-8 M REEs resulted in significantly decreased rates of developmental defects.

Rare earth elements ; Fertilization ; Developmental defects ; Transmissible effects ; Hormesis

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