Dopamine induces transient modulation of the physiological responses of whiteleg shrimp,Litopenaeus vannamei |
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| Institution: | 1. School of Medicine, Walailak University, Thasala District, Nakhonsrithammarat 80161, Thailand;2. Research Center of Excellence on Shrimp, Walailak University, Thasala District, Nakhonsrithammarat 80161, Thailand;3. Nakhonsawan Campus, Mahidol University, Nakhonsawan 60130, Thailand;4. Center of Excellence for Shrimp Molecular Biology and Biotechnology, Mahidol University, Rama 6 Road, Phyathai, Bangkok 10400, Thailand;5. Department of Anatomy, Faculty of Science, Mahidol University, Rama 6 Road, Phyathai, Bangkok 10400, Thailand;1. Institute of Cell Biology, Zhejiang University, Hangzhou 310058, China;2. Key Laboratory of Conservation Biology for Endangered Wildlife of the Ministry of Education, Zhejiang University, Hangzhou 310058, China;3. Key Laboratory of Animal Virology of Ministry of Agriculture, Zhejiang University, Hangzhou 310058, China;4. Albert Einstein College of Medicine, Bronx, NY 10461, USA;5. The Ken & Ruth Davee Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, USA. |
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| Abstract: | Levels of glucose, lactate, Na+, K+, Cl?, protein, and oxyhemocyanin in the hemolymph and its osmolality were measured when the whiteleg shrimp (Litopenaeus vanammei; 20 ± 1.5 g), were individually injected with saline or dopamine at 10? 8, 10? 7, or 10? 6 mol shrimp? 1. Results showed that elevations of hemolymph glucose and lactate occurred at between 2 and 4 h, increases in hemolymph osmolality, Cl?, Na+, and total protein occurred at 2 h, and a reduction in hemolymph oxyhemocyanin occurred at 4 h after the dopamine injection. All physiological parameters except K+ had returned to the control values 8–16 h after receiving the dopamine. The injection of dopamine also significantly decreased the oxyhemocyanin/protein ratio of L. vannamei at 2 h as a result of the elevation of hemolymph protein. These results suggest that stress-inducing dopamine causes a transient period of modulation of energy metabolism, osmoregulation, and a respiratory response in L. vannamei in adapting to an environmental stress. |
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