【目的】探究黑龙江林蛙(Rana amurensis)热休克蛋白90α家族B类成员1(heat shock protein 90 alpha class B member 1,HSP90AB1)基因的序列特征,了解其组织表达特性和脂多糖(LPS)诱导下的表达变化。【方法】以黑龙江林蛙脾脏组织cDNA...【目的】探究黑龙江林蛙(Rana amurensis)热休克蛋白90α家族B类成员1(heat shock protein 90 alpha class B member 1,HSP90AB1)基因的序列特征,了解其组织表达特性和脂多糖(LPS)诱导下的表达变化。【方法】以黑龙江林蛙脾脏组织cDNA为模板,通过PCR扩增HSP90AB1基因完整编码区(CDS)序列,使用在线软件对其编码蛋白进行生物信息学分析;利用实时荧光定量PCR和Western blotting检测生理状态下HSP90AB1基因在黑龙江林蛙皮肤、肌肉、心脏、肝脏、脾脏、肺脏、肾脏和胃等组织器官中的表达量,同时对LPS诱导下不同时间点HSP90AB1基因在不同组织器官的转录水平进行检测。【结果】黑龙江林蛙HSP90AB1基因CDS长2178 bp,共编码725个氨基酸。生物信息学分析显示,HSP90AB1蛋白不存在信号肽且无跨膜信号,属于非跨膜蛋白,存在62个潜在磷酸化位点(含33个丝氨酸、19个苏氨酸及10个酪氨酸位点),其二级结构以α-螺旋为主(占47.03%),其次为无规则卷曲(占39.59%)和延伸链(占13.38%)。系统进化树结果显示,黑龙江林蛙与欧洲林蛙亲缘关系最近。在生理状态下,HSP90AB1基因在黑龙江林蛙胃中表达量最高,且显著高于其他组织(P<0.05);在肌肉组织中表达量最低,且显著低于其他组织(P<0.05)。Western blotting结果显示,HSP90AB1蛋白在黑龙江林蛙胃中表达量最高;在心脏中表达量最低,且显著低于其他组织(P<0.05)。LPS诱导后,黑龙江林蛙各组织中HSP90AB1基因表达量随诱导时间延长而呈降低趋势,其中诱导72和96 h表达量均显著低于其他时间点(P<0.05);诱导12、72 h时脾脏中HSP90AB1基因表达量显著高于其他组织(P<0.05);24 h时肌肉和脾脏中HSP90AB1基因表达量显著高于其他组织(P<0.05)。【结论】本研究成功克隆了黑龙江林蛙HSP90AB1基因CDS区序列,并明确了其在不同组织中的表达规律,其中在胃中表达量最高,肌肉组织中表达量最低。LPS诱导可明显抑制HSP90AB1基因在黑龙江林蛙不同组织中的转录水平。本试验结果为深入探究HSP90AB1基因在林蛙生理及应激过程中的功能机制提供了理论依据。展开更多
Since 1995,three viral isolates named RGV9506,RGV9807 and RGV9808 associated with frog mortality were isolated from farm-raised frogs (Rana grylio virus,RGV) in China.Both ultrastructural morphology and serological ch...Since 1995,three viral isolates named RGV9506,RGV9807 and RGV9808 associated with frog mortality were isolated from farm-raised frogs (Rana grylio virus,RGV) in China.Both ultrastructural morphology and serological characterisitics had shown that the RGV isolates belong to genus Ranavirus. The DNA sequence analysis of the 5′end of the major capsid protein(MCP) gene of RGV isolates by PCR amplification produced a 531bp fragment.DNA templates were prepared from cells infected with different RGV isolates and the specific primers designed were based on highly conserved region at the 5′ of the gene encoding Frog virus 3(FV3) MCP, which is the typical species of the genus Ranavirus.The PCR products indicate that the nucleotide sequence of MCP gene of the RGV9506,RGV9807 and RGV9808 showed 99.6%, 99.8% and 98.4% homology respectively with the corresponding region of the MCP gene of FV3.展开更多
[目的]分离并鉴定棘胸蛙歪头病病原。[方法]从患歪头病棘胸蛙(Quasipaa spinosa)体内分离到致病菌,分别采用4种不同方式进行人工感染试验,通过形态观察、生理生化试验、16S r DNA测序等方法进行鉴定,并采用抑菌圈研究该菌株对12种抗生...[目的]分离并鉴定棘胸蛙歪头病病原。[方法]从患歪头病棘胸蛙(Quasipaa spinosa)体内分离到致病菌,分别采用4种不同方式进行人工感染试验,通过形态观察、生理生化试验、16S r DNA测序等方法进行鉴定,并采用抑菌圈研究该菌株对12种抗生素的敏感性。[结果]除口服方式外,肌肉注射、皮肤损伤浸泡、皮肤不损伤浸泡感染途径均能使棘胸蛙发病并导致死亡,且对蛙有较强的致病性。通过生理生化试验和16S r DNA测序等方法鉴定致病菌为脑膜炎败血金黄杆菌(Chryseobacterium meningosepticum)。药敏试验结果表明:该致病菌对万古霉素、头孢哌酮、庆大霉素和红霉素高度敏感,而对吡哌酸、链霉素、四环素、诺氟沙星、青霉素、新霉素、林可霉素、先锋霉素不敏感。[结论]棘胸蛙歪头病病原为脑膜炎败血金黄杆菌。展开更多
Three bacteria strains were isolated from the skin tissue of Rana grylio with "necrotic skin disease".After artificial infection by the bacteria strain skin 1-3 was determined to be the pathogen of the "...Three bacteria strains were isolated from the skin tissue of Rana grylio with "necrotic skin disease".After artificial infection by the bacteria strain skin 1-3 was determined to be the pathogen of the "necrotic skin disease".It was identified to be Acinetobacter lwoffii by VITEK-AMS-60 automatic identification system.The bacteria were rod shaped with a size of (0 75～0 93 ) μm×(1 5～2) μm, Gram-negative, and non-mobile. It was sensitive to 17 species of drugs and resistant to 5 drugs.展开更多
文摘【目的】探究黑龙江林蛙(Rana amurensis)热休克蛋白90α家族B类成员1(heat shock protein 90 alpha class B member 1,HSP90AB1)基因的序列特征,了解其组织表达特性和脂多糖(LPS)诱导下的表达变化。【方法】以黑龙江林蛙脾脏组织cDNA为模板,通过PCR扩增HSP90AB1基因完整编码区(CDS)序列,使用在线软件对其编码蛋白进行生物信息学分析;利用实时荧光定量PCR和Western blotting检测生理状态下HSP90AB1基因在黑龙江林蛙皮肤、肌肉、心脏、肝脏、脾脏、肺脏、肾脏和胃等组织器官中的表达量,同时对LPS诱导下不同时间点HSP90AB1基因在不同组织器官的转录水平进行检测。【结果】黑龙江林蛙HSP90AB1基因CDS长2178 bp,共编码725个氨基酸。生物信息学分析显示,HSP90AB1蛋白不存在信号肽且无跨膜信号,属于非跨膜蛋白,存在62个潜在磷酸化位点(含33个丝氨酸、19个苏氨酸及10个酪氨酸位点),其二级结构以α-螺旋为主(占47.03%),其次为无规则卷曲(占39.59%)和延伸链(占13.38%)。系统进化树结果显示,黑龙江林蛙与欧洲林蛙亲缘关系最近。在生理状态下,HSP90AB1基因在黑龙江林蛙胃中表达量最高,且显著高于其他组织(P<0.05);在肌肉组织中表达量最低,且显著低于其他组织(P<0.05)。Western blotting结果显示,HSP90AB1蛋白在黑龙江林蛙胃中表达量最高;在心脏中表达量最低,且显著低于其他组织(P<0.05)。LPS诱导后,黑龙江林蛙各组织中HSP90AB1基因表达量随诱导时间延长而呈降低趋势,其中诱导72和96 h表达量均显著低于其他时间点(P<0.05);诱导12、72 h时脾脏中HSP90AB1基因表达量显著高于其他组织(P<0.05);24 h时肌肉和脾脏中HSP90AB1基因表达量显著高于其他组织(P<0.05)。【结论】本研究成功克隆了黑龙江林蛙HSP90AB1基因CDS区序列,并明确了其在不同组织中的表达规律,其中在胃中表达量最高,肌肉组织中表达量最低。LPS诱导可明显抑制HSP90AB1基因在黑龙江林蛙不同组织中的转录水平。本试验结果为深入探究HSP90AB1基因在林蛙生理及应激过程中的功能机制提供了理论依据。
文摘Since 1995,three viral isolates named RGV9506,RGV9807 and RGV9808 associated with frog mortality were isolated from farm-raised frogs (Rana grylio virus,RGV) in China.Both ultrastructural morphology and serological characterisitics had shown that the RGV isolates belong to genus Ranavirus. The DNA sequence analysis of the 5′end of the major capsid protein(MCP) gene of RGV isolates by PCR amplification produced a 531bp fragment.DNA templates were prepared from cells infected with different RGV isolates and the specific primers designed were based on highly conserved region at the 5′ of the gene encoding Frog virus 3(FV3) MCP, which is the typical species of the genus Ranavirus.The PCR products indicate that the nucleotide sequence of MCP gene of the RGV9506,RGV9807 and RGV9808 showed 99.6%, 99.8% and 98.4% homology respectively with the corresponding region of the MCP gene of FV3.
文摘[目的]分离并鉴定棘胸蛙歪头病病原。[方法]从患歪头病棘胸蛙(Quasipaa spinosa)体内分离到致病菌,分别采用4种不同方式进行人工感染试验,通过形态观察、生理生化试验、16S r DNA测序等方法进行鉴定,并采用抑菌圈研究该菌株对12种抗生素的敏感性。[结果]除口服方式外,肌肉注射、皮肤损伤浸泡、皮肤不损伤浸泡感染途径均能使棘胸蛙发病并导致死亡,且对蛙有较强的致病性。通过生理生化试验和16S r DNA测序等方法鉴定致病菌为脑膜炎败血金黄杆菌(Chryseobacterium meningosepticum)。药敏试验结果表明:该致病菌对万古霉素、头孢哌酮、庆大霉素和红霉素高度敏感,而对吡哌酸、链霉素、四环素、诺氟沙星、青霉素、新霉素、林可霉素、先锋霉素不敏感。[结论]棘胸蛙歪头病病原为脑膜炎败血金黄杆菌。
文摘Three bacteria strains were isolated from the skin tissue of Rana grylio with "necrotic skin disease".After artificial infection by the bacteria strain skin 1-3 was determined to be the pathogen of the "necrotic skin disease".It was identified to be Acinetobacter lwoffii by VITEK-AMS-60 automatic identification system.The bacteria were rod shaped with a size of (0 75～0 93 ) μm×(1 5～2) μm, Gram-negative, and non-mobile. It was sensitive to 17 species of drugs and resistant to 5 drugs.
