Expression of c-Type Lysozyme from the Fleshy Shrimp Fenneropenaeus chinensis Is Upregulated Following Vibrio anguillarum and Lipopolysaccharide Injection
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Chicken-type lysozyme (c-lysozyme) is present in shrimp and is active against some bacteria. To further understand the regulation of c-lysozyme in the fleshy shrimp Fenneropenaeus chinensis, we determined the tissue-specific gene expression of c-lysozyme and the time-course of mRNA expression in response to Vibrio anguillarum and lipopolysaccharide (LPS) injection by quantitative reverse real-time polymerase chain reaction. The results showed that c-lysozyme was expressed in all tissues tested, including gill, eyestalk, eye, hemocytes, hepatopancreas, intestine, heart, and pleopod. It was most highly expressed in the intestine followed by the eyestalk, gill, hemocytes and hepatopancreas. The mRNA expression level began to decline in a short time after V. anguillarum challenge and was then upregulated by two fold or more at 24 h post injection (hpi) compared to that at 0 h. Expression was suppressed shortly after LPS injection and began to increase with higher levels of 5.8-, 5.2- and 8.4-fold at 24, 48, and 72 hpi, respectively. Higher expression was sustained and showed a gradual increasing trend until the end of the experiment (72 hpi). These results increase our understanding of the regulation of defense mechanisms and facilitate an evaluation of the effects of probiotics or immunostimulants in shrimp culture.
Abstract
Chicken-type lysozyme (c-lysozyme) is present in shrimp and is active against some bacteria. To further understand the regulation of c-lysozyme in the fleshy shrimp Fenneropenaeus chinensis, we determined the tissue-specific gene expression of c-lysozyme and the time-course of mRNA expression in response to Vibrio anguillarum and lipopolysaccharide (LPS) injection by quantitative reverse real-time polymerase chain reaction. The results showed that c-lysozyme was expressed in all tissues tested, including gill, eyestalk, eye, hemocytes, hepatopancreas, intestine, heart, and pleopod. It was most highly expressed in the intestine followed by the eyestalk, gill, hemocytes and hepatopancreas. The mRNA expression level began to decline in a short time after V. anguillarum challenge and was then upregulated by two fold or more at 24 h post injection (hpi) compared to that at 0 h. Expression was suppressed shortly after LPS injection and began to increase with higher levels of 5.8-, 5.2- and 8.4-fold at 24, 48, and 72 hpi, respectively. Higher expression was sustained and showed a gradual increasing trend until the end of the experiment (72 hpi). These results increase our understanding of the regulation of defense mechanisms and facilitate an evaluation of the effects of probiotics or immunostimulants in shrimp culture.
참고문헌 (36)
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