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首页> 外文期刊>Journal of Fish Biology >Identification of multiple genes and their expression profiles in four strains of Oreochromis spp. in response to Streptococcus iniae
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Identification of multiple genes and their expression profiles in four strains of Oreochromis spp. in response to Streptococcus iniae

机译:在四个Oreochromis spp菌株中鉴定多个基因及其表达谱。对猪链球菌的反应

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摘要

Two subtractive complementary DNA libraries were constructed from Nile tilapia Oreochromis niloticus vaccinated with formalin-killed Streptococcus iniae cells, and a further two constructed from O. niloticus infected with S. iniae. Of the 68 distinct expressed sequence tag (EST) contigs and singletons, 45 and 13 EST shared high similarities with genes of known and unknown functions, respectively. Ten EST contigs and singletons had no significant similarity to any sequences. Five putative immune-relevant genes, 2m, -ha, mmp9, pgrn and cxcr4, were selected for quantitative reverse-transcription polymerase chain reaction in four strains of Oreochromis spp.: genetically improved farmed tilapia (O. niloticus), Oreochromis aureus, O. niloticus and O. niloticusxO. aureus, with different disease resistance following infection with S. iniae. pgrn was up-regulated more significantly in disease-resistant strains than in the susceptible. -ha was markedly down-regulated, and no significant differences in the expression level of 2m were detected. A negative correlation was observed between the expression of mmp9 and that of cxcr4. The results provide insight into the molecular response of O. niloticus to S. iniae infection.
机译:从用福尔马林杀死的链球菌接种的尼罗罗非鱼尼罗罗非鱼中构建两个减性互补DNA文库,从感染链球菌的尼罗罗非鱼中构建另外两个文库。在68个不同的表达序列标签(EST)重叠群和单例中,分别有45个和13个EST与已知功能和未知功能的基因具有高度相似性。十个EST重叠群和单例与任何序列均无显着相似性。选择了五个推定的免疫相关基因2m,-ha,mmp9,pgrn和cxcr4,用于四个Oreochromis spp。菌株中的定量逆转录聚合酶链反应:基因改良养殖罗非鱼(O. niloticus),Oreochromis aureus,O 。niloticus和O. niloticusxO。金黄色葡萄球菌,感染金黄色葡萄球菌后具有不同的抗病性。抗药性菌株中的pgrn上调比易感菌株中的上调更多。 -ha明显下调,并且在2m的表达水平中未检测到显着差异。在mmp9和cxcr4的表达之间观察到负相关。该结果提供了对尼罗罗非鱼对海豚链球菌感染的分子反应的深入了解。

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