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国家重点基础研究发展计划(2010CB945401)

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相关作者:萨初拉吴应积罗奋华黄军就更多>>
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牛精原干细胞体外分化潜能的分析被引量:1
2014年
家畜精原干细胞操作的核心技术是精原干细胞(spermatogonial stem cells,SSCs)的长期培养。至今家畜精原干细胞的长期培养方法还没有完善。其中的一个原因是缺乏简便有效的家畜精原干细胞生物活性鉴定手段。该研究的目的是建立一种牛精原干细胞生理潜能的体外分析方法,用于体外培养的牛精原干细胞的生物活性鉴定。首先培养牛精原干细胞,进而用干细胞因子(stem cell factor,SCF)对体外长期培养的牛精原干细胞进行诱导分化。在诱导分化过程中对细胞进行显微观察,并且用免疫荧光染色法鉴定分化的细胞。观察结果显示,经过诱导培养8 d后,牛精原干细胞形态发生了明显改变;细胞的运动行为显示出精母细胞特有的特征。免疫荧光染色结果显示,分化的细胞表达精母细胞的标记基因Scp3。上述结果例证了体外培养的牛精原干细胞具有分化为精母细胞的潜能。该研究建立了牛SSCs体外诱导分化的分析方法,用于鉴定体外培养的牛SSCs的生理潜能。但是体外诱导培养条件不能满足牛SSCs减数分裂的全部要求,导致出现一些不完全符合精母细胞特征的现象。诱导分化培养液尚需改进。
罗奋华萨初拉黄军就吴应积
关键词:精原干细胞体外分化干细胞因子
Comparative study of de novo assembly and genome-guided assembly strategies for transcriptome reconstruction based on RNA-Seq被引量:2
2013年
Transcriptome reconstruction is an important application of RNA-Seq,providing critical information for further analysis of transcriptome.Although RNA-Seq offers the potential to identify the whole picture of transcriptome,it still presents special challenges.To handle these difficulties and reconstruct transcriptome as completely as possible,current computational approaches mainly employ two strategies:de novo assembly and genome-guided assembly.In order to find the similarities and differences between them,we firstly chose five representative assemblers belonging to the two classes respectively,and then investigated and compared their algorithm features in theory and real performances in practice.We found that all the methods can be reduced to graph reduction problems,yet they have different conceptual and practical implementations,thus each assembly method has its specific advantages and disadvantages,performing worse than others in certain aspects while outperforming others in anther aspects at the same time.Finally we merged assemblies of the five assemblers and obtained a much better assembly.Additionally we evaluated an assembler using genome-guided de novo assembly approach,and achieved good performance.Based on these results,we suggest that to obtain a comprehensive set of recovered transcripts,it is better to use a combination of de novo assembly and genome-guided assembly.
LU BingXinZENG ZhenBingSHI TieLiu
关键词:RNA-SEQ
Next-generation sequencing technologies for personalized medicine:promising but challenging被引量:4
2013年
In the past several years, next-generation sequencing (NGS) technologies have greatly revolutionized our approaches to explore and depict the characteristics and functions of the genomes for various species. The NGS technologies have been broadly used in diverse fields including genomics (genome sequencing and exome sequencing) ,
CHEN GengSHI TieLiu
关键词:测序技术基因组测序基因组学
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