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Animals (Basel)
2023 Jun 11;1312:. doi: 10.3390/ani13121954.
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Short-Term Thermal Stress Affects Immune Cell Features in the Sea Urchin Paracentrotus lividus.
Murano C
,
Gallo A
,
Nocerino A
,
Macina A
,
Cecchini Gualandi S
,
Boni R
.
Abstract
Due to global warming, animals are experiencing heat stress (HS), affecting many organic functions and species' survival. In this line, some characteristics of immune cells in sea urchins subjected to short-term HS were evaluated. Paracentrotus lividus adult females were randomly divided into three groups and housed in tanks at 17 °C. In two of these tanks, the temperatures were gradually increased up to 23 and 28 °C. Celomatic fluid was collected after 3 and 7 days. The coelomocytes were morphologically typed and evaluated for their mitochondrial membrane potential (MMP), lipoperoxidation extent (LPO), and hydrogen peroxide content (H2O2). Respiratory burst was induced by treatment with phorbol 12-myristate 13-acetate (PMA). HS caused a significant change in the coelomocytes' type distribution. MMP increased in the 23 °C-group and decreased in the 28 °C-group at both 3 and 7 days. LPO only increased in the 28 °C-group at 7 days. H2O2 progressively decreased together with the temperature increase. Respiratory burst was detected in all groups, but it was higher in the 17 °C group. In conclusion, the increase in temperature above the comfort zone for this animal species affects their immune cells with possible impairment of their functions.
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