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Ultimobranchial gland of a freshwater teleost, Heteropneustes fossilis, in response to cadmium treatment
10.1002/tox.20460.abs
Heteropneustes fossilis were subjected to 288 mg/L (0.8 of 96 h LC50) and 72 mg/L (0.2 of 96 h LC50) of cadmium chloride for short‐term and long‐term experiments, respectively. After sacrificing the fish, the blood was collected on 24, 48, 72, and 96 h in short‐term and after 7, 14, 21, and 28 days in long‐term experiment and analyzed for plasma calcium levels. Also, ultimobranchial glands were fixed on these intervals. The plasma calcium levels of short‐term cadmium‐exposed fish remain unchanged after 24 h. The levels exhibit a progressive decrease from 48 h onwards. The fish exposed to cadmium for 7 days exhibit a decrease in the plasma calcium level. Thereafter, the levels progressively decrease till the end of the experiment (28 days). Up to 72 h exposure of the fish to cadmium, the ultimobranchial gland exhibits no histological change. After 96 h, a decrease in the staining response of the cytoplasm of ultimobranchial cells has been noticed. The nuclear volume of these cells records a slight decrease. Up to 14 days of cadmium exposure, there is no change in the histological structure of ultimobranchial gland. After 21 days following the exposure, the ultimobranchial cells exhibit a slight decrease in the staining response of the cytoplasm and the nuclear volume of these cells records a decrease. Following 28 days cadmium exposure the nuclear volume exhibits a further decrease, and degeneration and vacuolization sets in. © 2008 Wiley Periodicals, Inc. Environ Toxicol, 2009.
Ultimobranchial gland of a freshwater teleost, Heteropneustes fossilis, in response to cadmium treatment
10.1002/tox.20460.abs
Heteropneustes fossilis were subjected to 288 mg/L (0.8 of 96 h LC50) and 72 mg/L (0.2 of 96 h LC50) of cadmium chloride for short‐term and long‐term experiments, respectively. After sacrificing the fish, the blood was collected on 24, 48, 72, and 96 h in short‐term and after 7, 14, 21, and 28 days in long‐term experiment and analyzed for plasma calcium levels. Also, ultimobranchial glands were fixed on these intervals. The plasma calcium levels of short‐term cadmium‐exposed fish remain unchanged after 24 h. The levels exhibit a progressive decrease from 48 h onwards. The fish exposed to cadmium for 7 days exhibit a decrease in the plasma calcium level. Thereafter, the levels progressively decrease till the end of the experiment (28 days). Up to 72 h exposure of the fish to cadmium, the ultimobranchial gland exhibits no histological change. After 96 h, a decrease in the staining response of the cytoplasm of ultimobranchial cells has been noticed. The nuclear volume of these cells records a slight decrease. Up to 14 days of cadmium exposure, there is no change in the histological structure of ultimobranchial gland. After 21 days following the exposure, the ultimobranchial cells exhibit a slight decrease in the staining response of the cytoplasm and the nuclear volume of these cells records a decrease. Following 28 days cadmium exposure the nuclear volume exhibits a further decrease, and degeneration and vacuolization sets in. © 2008 Wiley Periodicals, Inc. Environ Toxicol, 2009.
Ultimobranchial gland of a freshwater teleost, Heteropneustes fossilis, in response to cadmium treatment
Rai, Rubi (author) / Mishra, Diwakar (author) / Srivastav, Sunil Kumar (author) / Srivastav, Ajai Kumar (author)
Environmental Toxicology ; 24 ; 589-593
2009-12-01
5 pages
Article (Journal)
Electronic Resource
English