TY - JOUR
T1 - Cadmium affects the expression of metallothionein (MT) and glutathione peroxidase (GPX) mRNA in goldfish, Carassius auratus
AU - Choi, Cheol Young
AU - An, Kwang Wook
AU - Nelson, Erik R.
AU - Habibi, Hamid R.
N1 - Funding Information:
This work was supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MOST) (No. F01-2006-000-10066-0).
PY - 2007/5
Y1 - 2007/5
N2 - Cadmium (Cd) is a widespread non-essential heavy metal that enters the aquatic environment as a result of natural and human-caused activities, including industrial effluent, mining, and agricultural runoff. In the present study, we investigated time and dose-related effect of CdCl2 on metallothionein (MT) and glutathione peroxidase (GPX) mRNA levels in a number of goldfish tissues, in vivo. Basal MT and GPX mRNA levels remained unchanged in the tissues tested throughout the experiment. Injection with CdCl2 significantly increased MT mRNA levels in the brain, liver, kidney and intestine in a dose-dependant manner at all time tested (6, 12, 24 and 36 h). We isolated the full length GPX cDNA from goldfish kidneys, and found it to contain 785 nucleotides, including an open reading frame, predicted to encode a protein of 142 amino acids. In contrast, injection with CdCl2 significantly decreased GPX mRNA levels in the liver and kidney in a time-, and dose-, dependant, and became undetectable after 12, 24 and 36 h. The findings provide molecular characterization of MT and GPX in goldfish and suggest that exposure to Cd results in significant physiological changes in goldfish.
AB - Cadmium (Cd) is a widespread non-essential heavy metal that enters the aquatic environment as a result of natural and human-caused activities, including industrial effluent, mining, and agricultural runoff. In the present study, we investigated time and dose-related effect of CdCl2 on metallothionein (MT) and glutathione peroxidase (GPX) mRNA levels in a number of goldfish tissues, in vivo. Basal MT and GPX mRNA levels remained unchanged in the tissues tested throughout the experiment. Injection with CdCl2 significantly increased MT mRNA levels in the brain, liver, kidney and intestine in a dose-dependant manner at all time tested (6, 12, 24 and 36 h). We isolated the full length GPX cDNA from goldfish kidneys, and found it to contain 785 nucleotides, including an open reading frame, predicted to encode a protein of 142 amino acids. In contrast, injection with CdCl2 significantly decreased GPX mRNA levels in the liver and kidney in a time-, and dose-, dependant, and became undetectable after 12, 24 and 36 h. The findings provide molecular characterization of MT and GPX in goldfish and suggest that exposure to Cd results in significant physiological changes in goldfish.
KW - Cadmium
KW - Carassius auratus
KW - Gene expression
KW - Glutathione peroxidase
KW - Metallothionein
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U2 - 10.1016/j.cbpc.2007.02.007
DO - 10.1016/j.cbpc.2007.02.007
M3 - Article
C2 - 17369103
AN - SCOPUS:34247491092
SN - 1532-0456
VL - 145
SP - 595
EP - 600
JO - Comparative Biochemistry and Physiology - C Toxicology and Pharmacology
JF - Comparative Biochemistry and Physiology - C Toxicology and Pharmacology
IS - 4
ER -