이배체 및 삼배체 전복(Haliotis discus hannai) 치패에서 주요 열충격 단백질 유전자들(heat shock protein genes)의 발현 특징
Expression Pattern of Major Heat Shock Protein Genes in Diploid and Triploid Abalone Haliotis discus hannai Juveniles
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초록
Basal and heat shock-induced mRNA expression patterns of major heat shock protein (HSP) genes, including those encoding heat shock protein (HSP) 90, HSP70, HSP70-12A, heat shock inducible protein 70 (HSIP70), heat shock binding protein 1 (HSPBP1), HSP60, and HSP40 were examined in the gill and hepatopancreas of 1-year-old diploid and triploid abalone Haliotis discus hannai juveniles. Under non-stimulated conditions at 19ºC, triploid abalones displayed, in general, higher mRNA levels of various HSPs (HSP70, HSIP70, HSPBP1, HSP70-12A, and HSP60 in the gill and HSIP70, HSPBP1, and HSP60 in the hepatopancreas) than did communally cultured diploids. Conversely, only the hepatopancreatic expression of HSP70-12A was higher in diploids than in triploids. However, the fold changes in gene expression in response to an acute thermal challenge (elevation from 19 to 30ºC) were generally greater in diploids than in triploids, such that the difference in basal expression was diminished, weakened, or even reversed after heat shock treatment. However, unlike other HSP genes, the basal expression of HSP60 (higher in 3N) was more pronounced after heat shock treatment. Collectively, the results of this study suggest that triploid abalones have different capacities for not only basal expression but also the heat-induced expression of HSPs in an HSP member-dependent manner.
Abstract
Basal and heat shock-induced mRNA expression patterns of major heat shock protein (HSP) genes, including those encoding heat shock protein (HSP) 90, HSP70, HSP70-12A, heat shock inducible protein 70 (HSIP70), heat shock binding protein 1 (HSPBP1), HSP60, and HSP40 were examined in the gill and hepatopancreas of 1-year-old diploid and triploid abalone Haliotis discus hannai juveniles. Under non-stimulated conditions at 19ºC, triploid abalones displayed, in general, higher mRNA levels of various HSPs (HSP70, HSIP70, HSPBP1, HSP70-12A, and HSP60 in the gill and HSIP70, HSPBP1, and HSP60 in the hepatopancreas) than did communally cultured diploids. Conversely, only the hepatopancreatic expression of HSP70-12A was higher in diploids than in triploids. However, the fold changes in gene expression in response to an acute thermal challenge (elevation from 19 to 30ºC) were generally greater in diploids than in triploids, such that the difference in basal expression was diminished, weakened, or even reversed after heat shock treatment. However, unlike other HSP genes, the basal expression of HSP60 (higher in 3N) was more pronounced after heat shock treatment. Collectively, the results of this study suggest that triploid abalones have different capacities for not only basal expression but also the heat-induced expression of HSPs in an HSP member-dependent manner.
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