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深海原位孔隙水采集系统设计改进和海试验证
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作者 刘广虎 陆程 +6 位作者 赵宏宇 刘纪勇 刘梓锐 何赵 白名岗 吴宣志 徐著华 《地球科学前沿(汉斯)》 2018年第1期141-151,共11页
针对原位孔隙水气密采集系统原理样机可能会受到少量海水混合的干扰问题,原位孔隙水气密采集系统生产样机在结构和总体设计等方面进行了多项防海水混合的改进措施。并在南海北部海域通过原位孔隙水气密采集系统生产样机开展了原位孔隙... 针对原位孔隙水气密采集系统原理样机可能会受到少量海水混合的干扰问题,原位孔隙水气密采集系统生产样机在结构和总体设计等方面进行了多项防海水混合的改进措施。并在南海北部海域通过原位孔隙水气密采集系统生产样机开展了原位孔隙水样品采集试验,通过对样品中CH4、PO43-、 NH4+、总碱度含量进行测试分析,证实了生产样机防海水混合设计方案的可行性、科学性和有效性。 展开更多
关键词 原位孔隙水 设计 改进 海试 有效
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Plant-derived nanovesicles: Further exploration of biomedical function and application potential
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作者 Aixue Li Dan Li +6 位作者 Yongwei Gu Rongmei liu Xiaomeng Tang Yunan Zhao Fu Qi Jifu Wei jiyong liu 《Acta Pharmaceutica Sinica B》 SCIE CAS CSCD 2023年第8期3300-3320,共21页
Extracellular vesicles(EVs)are phospholipid bilayer vesicles actively secreted by cells,that contain a variety of functional nucleic acids,proteins,and lipids,and are important mediums of intercellular communication.B... Extracellular vesicles(EVs)are phospholipid bilayer vesicles actively secreted by cells,that contain a variety of functional nucleic acids,proteins,and lipids,and are important mediums of intercellular communication.Based on their natural properties,EVs can not only retain the pharmacological effects of their source cells but also serve as natural delivery carriers.Among them,plant-derived nanovesicles(PNVs)are characterized as natural disease therapeutics with many advantages such as simplicity,safety,eco-friendliness,low cost,and low toxicity due to their abundant resources,large yield,and low risk of immunogenicity in vivo.This review systematically introduces the biogenesis,isolation methods,physical characterization,and components of PNVs,and describes their administration and cellular uptake as therapeutic agents.We highlight the therapeutic potential of PNVs as therapeutic agents and drug delivery carriers,including anti-inflammatory,anticancer,wound healing,regeneration,and antiaging properties as well as their potential use in the treatment of liver disease and COVID-19.Finally,the toxicity and immunogenicity,the current clinical application,and the possible challenges in the future development of PNVs were analyzed.We expect the functions of PNVs to be further explored to promote clinical translation,thereby facilitating the development of a new framework for the treatment of human diseases. 展开更多
关键词 Plant-derived nanovesicles Extracellular vesicles Therapeutic agents Drugdelivery systems Clinical application
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Efficient and Specific Modifications of the Drosophila Genome by Means of an Easy TALEN Strategy 被引量:44
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作者 jiyong liu Changqing Li +9 位作者 Zhongsheng Yu Peng Huang Honggang Wu Chuanxian Wei Nannan Zhu Yan Shen Yixu Chen Bo Zhang Wu-Min Deng Renjie Jiao 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2012年第5期209-215,共7页
Technology development has always been one of the forces driving breakthroughs in biomedical research. Since the time of Thomas Morgan, Drosophilists have, step by step, developed powerful genetic tools for manipulati... Technology development has always been one of the forces driving breakthroughs in biomedical research. Since the time of Thomas Morgan, Drosophilists have, step by step, developed powerful genetic tools for manipulating and functionally dissecting the Drosophila genome, but room for improving these technologies and developing new techniques is still large, especially today as biologists start to study systematically the functional genomics of different model organisms, including humans, in a high-throughput manner. Here, we report, for the first time in Drosophila, a rapid, easy, and highly specific method for modifying the Drosophila genome at a very high efficiency by means of an improved transcription activator-like effector nuclease (TALEN) strategy. We took advantage of the very recently developed "unit assembly" strategy to assemble two pairs of specific TALENs designed to modify the yellow gene (on the sex chromosome) and a novel autosomal gene. The mRNAs of TALENs were subsequently injected into Drosophila embryos. From 31.2% of the injected Fo fertile flies, we detected inheritable modification involving the yellow gene. The entire process from construction of specific TALENs to detection of inheritable modifications can be accomplished within one month. The potential applications of this TALEN-mediated genome modification method in Drosophila are discussed. 展开更多
关键词 TALEN DROSOPHILA Genomic modification Unit assembly Reverse genetics
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Drosophila sbo regulates lifespan through its function in the synthesis of coenzyme Q in vivo 被引量:4
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作者 jiyong liu QinghuaWu +5 位作者 Dianlu He Tengyu Ma Li Du Wen Dui Xiaoyan Guo Renjie Jia 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2011年第6期225-234,共10页
CoQ is an essential electron cartier in the mitochondrial respiratory chain of both eukaryotes and prokaryotes. It consists of a benzoquinone head group and a hydrophobic polyisoprenoid tail. The genes (COQ1-9) invo... CoQ is an essential electron cartier in the mitochondrial respiratory chain of both eukaryotes and prokaryotes. It consists of a benzoquinone head group and a hydrophobic polyisoprenoid tail. The genes (COQ1-9) involved in CoQ biosynthesis have been characterized in yeast. In this study, we generated and molecularly characterized a mutant allele of a novel Drosophila gene, sbo, which encodes a protein that is predicted to catalyze the prenylation of p-hydroxybenzoate with the isoprenoid chain during the process of CoQ synthesis. Expression of sbo in yeast rescues the lethality of ACOQ2 mutant cells, indicating that sbo is a functional homolog of COQ2. HPLC results show that the levels of CoQ9 and COQlo were significantly reduced in sbo heterozygous adult flies. Furthermore, the mean lifespans of males and females heterozygous for sbo are extended by 12.5% and 30.8%, respectively. Homozygous sbo animals exhibit reduced activities of the insulin/insulin-like growth factor signaling (IIS) pathway. Taken together, we conclude that sbo is an essential gene for Drosophila development, mutation of which leads to an extension of lifespan most likely by altering endogenous CoQ biosynthesis. 展开更多
关键词 DROSOPHILA sbo Coenzyme Q LIFESPAN Insulin signaling
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TALEN or Cas9-Rapid,Efficient and Specific Choices for Genome Modifications 被引量:52
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作者 Chuanxian Wei jiyong liu +3 位作者 Zhongsheng Yu Bo Zhang Guanjun Gao Renjie Jiao 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2013年第6期281-289,共9页
Precise modifications of complex genomes at the single nucleotide level have been one of the big goals for scientists working in basic and applied genetics,including biotechnology,drug development,gene therapy and syn... Precise modifications of complex genomes at the single nucleotide level have been one of the big goals for scientists working in basic and applied genetics,including biotechnology,drug development,gene therapy and synthetic biology.However,the relevant techniques for making these manipulations in model organisms and human cells have been lagging behind the rapid high throughput studies in the post-genomic era with a bottleneck of low efficiency,time consuming and laborious manipulation,and off-targeting problems.Recent discoveries of TALEs(transcription activator-like effectors) coding system and CRISPR(clusters of regularly interspaced short palindromic repeats) immune system in bacteria have enabled the development of customized TALENs(transcription activator-like effector nucleases) and CRISPR/Cas9 to rapidly edit genomic DNA in a variety of cell types,including human cells,and different model organisms at a very high efficiency and specificity.In this review,we first briefly summarize the development and applications of TALENs and CRISPR/Cas9-mediated genome editing technologies;compare the advantages and constraints of each method;particularly,discuss the expected applications of both techniques in the field of site-specific genome modification and stem cell based gene therapy;finally, propose the future directions and perspectives for readers to make the choices. 展开更多
关键词 Genome editing TALEN CRISPR/Cas9 Gene therapy Stem cells
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Shaggy regulates tissue growth through Hippo pathway in Drosophila
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作者 Honggang Wu Nannan Zhu +2 位作者 jiyong liu Jun Ma Renjie Jiao 《Science China(Life Sciences)》 SCIE CAS CSCD 2022年第11期2131-2144,共14页
The evolutionarily conserved Hippo pathway coordinates cell proliferation,differentiation and apoptosis to regulate organ growth and tumorigenesis.Hippo signaling activity is tightly controlled by various upstream sig... The evolutionarily conserved Hippo pathway coordinates cell proliferation,differentiation and apoptosis to regulate organ growth and tumorigenesis.Hippo signaling activity is tightly controlled by various upstream signals including growth factors and cell polarity,but the full extent to which the pathway is regulated during development remains to be resolved.Here,we report the identification of Shaggy,the homolog of mammalian Gsk3β,as a novel regulator of the Hippo pathway in Drosophila.Our results show that Shaggy promotes the expression of Hippo target genes in a manner that is dependent on its kinase activity.Loss of Shaggy leads to Yorkie inhibition and downregulation of Hippo pathway target genes.Mechanistically,Shaggy acts upstream of the Hippo pathway and negatively regulates the abundance of the FERM domain containing adaptor protein Expanded.Our results reveal that Shaggy is functionally required for Crumbs/Slmb-mediated downregulation of Expanded in vivo,providing a potential molecular link between cellular architecture and the Hippo signaling pathway. 展开更多
关键词 DROSOPHILA growth control Hippo pathway Shaggy/Gsk3β Expanded
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