An actin gene (CfACT1) was cloned by using RT-PCR, 3’and 5’RACE from hemocytes of the sea scallop Chlamys farreri. The full length of the transcript is 1 535 bp, which contains a long 3’ un-translated region of 436...An actin gene (CfACT1) was cloned by using RT-PCR, 3’and 5’RACE from hemocytes of the sea scallop Chlamys farreri. The full length of the transcript is 1 535 bp, which contains a long 3’ un-translated region of 436bp and 59bp of a 5’ un-translated sequence. The open reading frame encodes a polypeptide of 376 amino acids. Sequence comparisons indicated that CfACT1 is more closely related to vertebrate cytoplasmic actins than muscle types. Phylogenetic analysis showed that molluscan actins could be generally divided into two categories: muscle and cytoplasmic, although both are similar to vertebrate cytoplasmic actins. It was also inferred that different isotypes existed in muscle or cytoplasma in mollusks. The genomic sequence of CfACT1 was cloned and sequenced. Only one intron was detected: it was located between codons 42 and 43 and different from vertebrate actin genes.展开更多
目的了解KI多瘤病毒（karolinska institutet polyomavirus,KIPyV）在我国福州儿童呼吸道感染中的检出情况及与呼吸道疾病的关系,并对毒株进行全基因组序列测定和种系分析。方法收集2007年11月~2014年3月在福建省福州市妇幼保健院因呼...目的了解KI多瘤病毒（karolinska institutet polyomavirus,KIPyV）在我国福州儿童呼吸道感染中的检出情况及与呼吸道疾病的关系,并对毒株进行全基因组序列测定和种系分析。方法收集2007年11月~2014年3月在福建省福州市妇幼保健院因呼吸道感染住院的重症监护病房（PICU）的235例小儿鼻咽抽取物样本,通过巢式PCR扩增法用2对特异引物对KIPyV的VP1基因片段进行检测。对检测出的1株KIPyV（FZ52）用4对全基因序列引物进行扩增和拼接,获得该株病毒的全基因组序列,上传GenBank并与基因库中国外其他8株KIPyV的全基因组序列和氨基酸序列进行比对,并做种系分析。结果从中发现1例KIPyV感染阳性病例,检测阳性率为0.4%,没有检测出KIPyV与其他呼吸道病毒的混合感染,如甲、乙型流感病毒（influenza type A or B virus,Flu A or B）、呼吸道合胞病毒（respiratory syncytial virus,RSV）、人偏肺病毒（human metapnumovirus,HMPV）、人博卡病毒（human bocavirus,HBoV）、WU多瘤病毒（WU polyomavirus,WUPyV）等。与参考株斯德哥尔摩的S60相比,有8个核苷酸不同,推导出的氨基酸序列有3处不同。同时,也将该序列与国内毒株的部分核苷酸序列进行比对分析。FZ52株与斯德哥尔摩的S380株关系较近,FZ52株、S380株与聚成一簇的S350株和布里斯班的B003株关系较近。结论种系分析显示中国福建福州的FZ52株与瑞典的S380株关系最近。展开更多
Hubei Province is a major epidemic area of severe fever with thrombocytopenia syndrome bunyavirus(SFTSV) in China. However, to date, a few SFTSV strains have been isolated from Hubei Province, preventing effective stu...Hubei Province is a major epidemic area of severe fever with thrombocytopenia syndrome bunyavirus(SFTSV) in China. However, to date, a few SFTSV strains have been isolated from Hubei Province, preventing effective studies of epidemic outbreaks. Here, we report three confirmed patients(2015–2016) with typical symptoms of severe fever with thrombocytopenia syndrome disease(SFTS) who were farmers resident in different regions in Hubei Province. Three new SFTSV strains were isolated from the serum samples of each patient. Characterization of viral growth properties showed that there were no significant differences in virus production. All strains were completely sequenced, and phylogenetic analysis showed that unlike the other strains from Hubei province, which belonged to the SFTSV C3 genotype, one of the three strains belonged to the SFTSV C2 genotype. These results suggested that multiple SFTSV genotypes have been circulating in Hubei Province, providing insights into SFTSV evolution and improving our understanding of SFTSV prevalence in Hubei Province.展开更多
Crimean-Congo hemorrhagic fever virus(CCHFV) is a highly pathogenic tick-borne virus with a fatality rate of up to 50% in humans. CCHFV is widely distributed in countries around the world.Outbreaks of CCHFV infection ...Crimean-Congo hemorrhagic fever virus(CCHFV) is a highly pathogenic tick-borne virus with a fatality rate of up to 50% in humans. CCHFV is widely distributed in countries around the world.Outbreaks of CCHFV infection in humans have occurred in prior years in Xinjiang Province, China.Epidemiological surveys have detected CCHFV RNA in ticks and animals; however, few isolates were identified. In this study, we identified and isolated a new CCHFV strain from Hyalomma asiaticum asiaticum ticks collected from north of Tarim Basin in Xinjiang, China. A preliminary investigation of infection and antigens expression of CCHFV was performed in newborn mice. The target tissues for CCHFV replication in newborn mice were identified. The analysis of the phylogenetic relationships with other Chinese strains suggested that diverse genotypes of CCHFV have circulated in Xinjiang for years. These findings provide important insights into our understanding of CCHFV infection and evolution as well as disease prevention and control for local residents.展开更多
The dengue virus （DENV） is a vital global public health issue. The 2014 dengue epidemic in Guangzhou, China, caused approximately 40,000 cases of infection and five deaths. We carried out a comprehensive investigati...The dengue virus （DENV） is a vital global public health issue. The 2014 dengue epidemic in Guangzhou, China, caused approximately 40,000 cases of infection and five deaths. We carried out a comprehensive investigation aimed at identifying the transmission sources in this dengue epidemic. To analyze the phylogenetics of the 2014 dengue strains, the envelope （E） gene sequences from 17 viral strains isolated from 168 dengue patient serum samples were sequenced and a phylogenetic tree was reconstructed. All 17 strains were serotype I strains, including 8 genotype I and 9 genotype V strains. Additionally, 6 genotype I strains that were probably introduced to China from Thailand before 2009 were widely transmitted in the 2013 and 2014 epidemics, and they continued to circulate until 2015, with one affinis strain being found in Singapore. The other 2 genotype I strains were introduced from the Malaya Peninsula in 2014. The transmission source of the 9 genotype V strains was from Malaysia in 2014. DENVs of different serotypes and genotypes co-circulated in the 2014 dengue outbreak in Guangzhou. Moreover, not only had DENV been imported to Guangzhou, but it had also been gradually exported, as the viruses exhibited an enzootic transmission cycle in Guangzhou.展开更多
基金Supported by the National Basic Research Program of China (973 Program, No. G1999012012)the Key Laboratory of Mariculture, Ministry of Education (No. 2004024)
文摘An actin gene (CfACT1) was cloned by using RT-PCR, 3’and 5’RACE from hemocytes of the sea scallop Chlamys farreri. The full length of the transcript is 1 535 bp, which contains a long 3’ un-translated region of 436bp and 59bp of a 5’ un-translated sequence. The open reading frame encodes a polypeptide of 376 amino acids. Sequence comparisons indicated that CfACT1 is more closely related to vertebrate cytoplasmic actins than muscle types. Phylogenetic analysis showed that molluscan actins could be generally divided into two categories: muscle and cytoplasmic, although both are similar to vertebrate cytoplasmic actins. It was also inferred that different isotypes existed in muscle or cytoplasma in mollusks. The genomic sequence of CfACT1 was cloned and sequenced. Only one intron was detected: it was located between codons 42 and 43 and different from vertebrate actin genes.
文摘目的了解KI多瘤病毒（karolinska institutet polyomavirus,KIPyV）在我国福州儿童呼吸道感染中的检出情况及与呼吸道疾病的关系,并对毒株进行全基因组序列测定和种系分析。方法收集2007年11月~2014年3月在福建省福州市妇幼保健院因呼吸道感染住院的重症监护病房（PICU）的235例小儿鼻咽抽取物样本,通过巢式PCR扩增法用2对特异引物对KIPyV的VP1基因片段进行检测。对检测出的1株KIPyV（FZ52）用4对全基因序列引物进行扩增和拼接,获得该株病毒的全基因组序列,上传GenBank并与基因库中国外其他8株KIPyV的全基因组序列和氨基酸序列进行比对,并做种系分析。结果从中发现1例KIPyV感染阳性病例,检测阳性率为0.4%,没有检测出KIPyV与其他呼吸道病毒的混合感染,如甲、乙型流感病毒（influenza type A or B virus,Flu A or B）、呼吸道合胞病毒（respiratory syncytial virus,RSV）、人偏肺病毒（human metapnumovirus,HMPV）、人博卡病毒（human bocavirus,HBoV）、WU多瘤病毒（WU polyomavirus,WUPyV）等。与参考株斯德哥尔摩的S60相比,有8个核苷酸不同,推导出的氨基酸序列有3处不同。同时,也将该序列与国内毒株的部分核苷酸序列进行比对分析。FZ52株与斯德哥尔摩的S380株关系较近,FZ52株、S380株与聚成一簇的S350株和布里斯班的B003株关系较近。结论种系分析显示中国福建福州的FZ52株与瑞典的S380株关系最近。
基金supported by the Science and Technology Basic Work Program (2013FY113500)the National Key Research and Development Program (2016YFE 0113500) from the Ministry of Science and Technology of Chinathe European Union’s Horizon 2020 EVAg project (No 653316)
文摘Hubei Province is a major epidemic area of severe fever with thrombocytopenia syndrome bunyavirus(SFTSV) in China. However, to date, a few SFTSV strains have been isolated from Hubei Province, preventing effective studies of epidemic outbreaks. Here, we report three confirmed patients(2015–2016) with typical symptoms of severe fever with thrombocytopenia syndrome disease(SFTS) who were farmers resident in different regions in Hubei Province. Three new SFTSV strains were isolated from the serum samples of each patient. Characterization of viral growth properties showed that there were no significant differences in virus production. All strains were completely sequenced, and phylogenetic analysis showed that unlike the other strains from Hubei province, which belonged to the SFTSV C3 genotype, one of the three strains belonged to the SFTSV C2 genotype. These results suggested that multiple SFTSV genotypes have been circulating in Hubei Province, providing insights into SFTSV evolution and improving our understanding of SFTSV prevalence in Hubei Province.
基金supported by the Science and Technology Basic Work Program (2013FY113500) from the Ministry of Science and Technology of China
文摘Crimean-Congo hemorrhagic fever virus(CCHFV) is a highly pathogenic tick-borne virus with a fatality rate of up to 50% in humans. CCHFV is widely distributed in countries around the world.Outbreaks of CCHFV infection in humans have occurred in prior years in Xinjiang Province, China.Epidemiological surveys have detected CCHFV RNA in ticks and animals; however, few isolates were identified. In this study, we identified and isolated a new CCHFV strain from Hyalomma asiaticum asiaticum ticks collected from north of Tarim Basin in Xinjiang, China. A preliminary investigation of infection and antigens expression of CCHFV was performed in newborn mice. The target tissues for CCHFV replication in newborn mice were identified. The analysis of the phylogenetic relationships with other Chinese strains suggested that diverse genotypes of CCHFV have circulated in Xinjiang for years. These findings provide important insights into our understanding of CCHFV infection and evolution as well as disease prevention and control for local residents.
基金supported by the Guangdong Natural Science Foundation (No. S2012030006598)the Science & Technology Planning Project of Guangdong Province of China (No. 2013A020229007)the Innovative Program of the State Key Laboratory of Virology (No. 2016KF001)
文摘The dengue virus （DENV） is a vital global public health issue. The 2014 dengue epidemic in Guangzhou, China, caused approximately 40,000 cases of infection and five deaths. We carried out a comprehensive investigation aimed at identifying the transmission sources in this dengue epidemic. To analyze the phylogenetics of the 2014 dengue strains, the envelope （E） gene sequences from 17 viral strains isolated from 168 dengue patient serum samples were sequenced and a phylogenetic tree was reconstructed. All 17 strains were serotype I strains, including 8 genotype I and 9 genotype V strains. Additionally, 6 genotype I strains that were probably introduced to China from Thailand before 2009 were widely transmitted in the 2013 and 2014 epidemics, and they continued to circulate until 2015, with one affinis strain being found in Singapore. The other 2 genotype I strains were introduced from the Malaya Peninsula in 2014. The transmission source of the 9 genotype V strains was from Malaysia in 2014. DENVs of different serotypes and genotypes co-circulated in the 2014 dengue outbreak in Guangzhou. Moreover, not only had DENV been imported to Guangzhou, but it had also been gradually exported, as the viruses exhibited an enzootic transmission cycle in Guangzhou.
