14 results on '"Yufang Sun"'
Search Results
2. Pretreating poplar cuttings with low nitrogen ameliorates salt stress responses by increasing stored carbohydrates and priming stress signaling pathways
- Author
-
Xinhua Zheng, Hao Zhang, Yufang Sun, Jie Luo, Yinan Yao, Víctor Resco de Dios, Yang Fei, Yongbin Ou, Yongfeng Gao, and Qian Feng
- Subjects
Antioxidant ,Soil salinity ,Nitrogen ,Health, Toxicology and Mutagenesis ,ATPase ,medicine.medical_treatment ,Salt stress ,Biocompatibilitat ,Carbohydrates ,Arbres--Creixement ,Environmental pollution ,Lipid peroxidation ,chemistry.chemical_compound ,Carbon/nitrogen ratio ,medicine ,Populus russikki ,GE1-350 ,Carboni ,Ion transporter ,Arbres--Protecció ,Cross tolerance ,biology ,Chemistry ,fungi ,Public Health, Environmental and Occupational Health ,General Medicine ,Salt Tolerance ,Pollution ,Arbres ,Cross-tolerance ,Environmental sciences ,Horticulture ,Transcriptome profile change ,Populus ,TD172-193.5 ,Osmolyte ,Toxicity ,biology.protein ,K+/Na+ ratio - Abstract
Soil salinity is a widespread stress in semi-arid forests worldwide, but how to manage nitrogen (N) nutrition to improve plant saline tolerance remains unclear. Here, the cuttings of a widely distributed poplar from central Asia, Populus russikki Jabl., were exposed to either normal or low nitrogen (LN) concentrations for two weeks in semi-controlled greenhouse, and then they were added with moderate salt solution or not for another two weeks to evaluate their physiological, biochemical, metabolites and transcriptomic profile changes. LN-pretreating alleviated the toxicity caused by the subsequent salt stress in the poplar plants, demonstrated by a significant reduction in the influx of Na+ and Cl- and improvement of the K+/Na+ ratio. The other salt-stressed traits were also ameliarated, indicated by the variations of chlorophyll content, PSII photochemical activity and lipid peroxidation. Stress alleviation resulted from two different processes. First, LN pretreatment caused a significant increase of non-structural carbohydrates (NSC), allowed for an increased production of osmolytes and a higher potential fueling ion transport under subsequent salt condition, along with increased transcript levels of the cation/H+ ATPase. Second, LN pretreatment enhanced the transcript levels of stress signaling components and phytohormones pathway as well as antioxidant enzyme activities. The results indicate that early restrictions of N supply could enhance posterior survival under saline stress in poplar plants, which is important for plantation programs and restoration activities in semi-arid areas. This research was supported by Natural Science Foundation of China ( 31770644 and 31270660 ), Project of Innovation research team in Sichuan Education Administration in China (No. 13TD0023 ).
- Published
- 2021
3. Homeobox B4 inhibits breast cancer cell migration by directly binding to StAR-related lipid transfer domain protein 13
- Author
-
Bin Xiong, Guangqi Zhou, Xinmei Liu, and Yufang Sun
- Subjects
0301 basic medicine ,Cancer Research ,cell migration ,Biology ,medicine.disease_cause ,doxorubicin ,03 medical and health sciences ,0302 clinical medicine ,Breast cancer ,breast cancer ,medicine ,E2F1 ,Oncogene ,STARD13 ,Cancer ,Articles ,Cell cycle ,medicine.disease ,Molecular biology ,HOXB4 ,030104 developmental biology ,Oncology ,030220 oncology & carcinogenesis ,Cancer research ,Signal transduction ,Carcinogenesis ,Chromatin immunoprecipitation - Abstract
The present study aimed to investigate the role of homeobox B4 (HOXB4) in breast cancer. Analysis of The Cancer Genome Atlas data revealed that HOXB4 expression was positively associated with expression of the StAR-related lipid transfer domain protein 13 (STARD13), and the overall survival of patients with breast cancer. Immunohistochemistry and quantitative polymerase chain reaction assays demonstrated that HOXB4 expression was downregulated in breast cancer tissues compared with adjacent normal tissues and was additionally positively associated with STARD13 expression. HOXB4 promoted STARD13 expression in breast cancer cells. Chromatin immunoprecipitation and luciferase reporter assays confirmed that HOXB4 directly bound to the STARD13 promoter. Additionally, HOXB4 inhibited breast cancer cell migration and the epithelial-mesenchymal transition through the STARD13/Ras homolog (Rho) family member A/Rho associated protein kinase signaling pathway. HOXB4 overexpression enhanced the sensitivity of breast cancer cells to doxorubicin and reversed resistance in doxorubicin-resistant cells. Overall, the results indicated that HOXB4 inhibited breast cancer cell migration and enhanced the sensitivity of breast cancer cells to doxorubicin by targeting STARD13.
- Published
- 2017
4. Absence of phosphatidylcholine in bacterial membranes facilitates translocation of Sec-dependent β-lactamase AmpC from cytoplasm to periplasm in two Pseudomonas strains
- Author
-
Min Xiong, Xin Liu, Yadong Li, Sheng Yang, Fang Cao, Xingguo Wang, Xuejing Yu, Yufang Sun, and Yang Li
- Subjects
DNA, Bacterial ,0301 basic medicine ,Cytoplasm ,030106 microbiology ,Mutant ,Microbiology ,beta-Lactamases ,Inhibitory Concentration 50 ,03 medical and health sciences ,chemistry.chemical_compound ,Bacterial Proteins ,Amp resistance ,Pseudomonas ,Phosphatidylcholine ,Drug Resistance, Bacterial ,Pseudomonas syringae ,Animals ,Amino Acid Sequence ,Cloning, Molecular ,Phospholipids ,Enzyme Assays ,Base Sequence ,biology ,Reverse Transcriptase Polymerase Chain Reaction ,Immune Sera ,Wild type ,Biological Transport ,Gene Expression Regulation, Bacterial ,Periplasmic space ,biology.organism_classification ,humanities ,030104 developmental biology ,Infectious Diseases ,chemistry ,Mutation ,Periplasm ,Phosphatidylcholines ,Rabbits ,Ampicillin Resistance ,Bacteria ,Bacterial Outer Membrane Proteins - Abstract
Phosphatidylcholine (PC) is a rare membrane lipid in bacteria but crucial for virulence of various plant and animal pathogens. The pcs- mutant lacking PC in bacterial membranes of Pseudomonas syringae pv. syringae van Hall 1336 displayed more ampicillin resistance. Ampicillin susceptibility tests gave an IC50 (half maximal inhibitory concentration) of 52 mg/ml for Pseudomonas syringae pv. syringae van Hall 1336, 53 mg/ml for the complemented strain 1336 RM (pcs-/+) and 90 mg/ml for the 1336 pcs- mutant. Activity assay of β-lactamase in periplasmic extracts gave 0.050 U/mg for the 1336 wild type, 0.052 U/mg for the 1336RM (pcs-/+), 0.086 U/mg for the 1336 pcs- mutant. Analysis by western blotting showed that the content of AmpC enzyme was markedly different in periplasmic extracts between the wild-type and pcs- mutant strains. Reverse transcriptase PCR also showed that the presence or absence of PC in bacterial membranes did not affect the transcription of ampC gene. The phenotype of the pcs- mutant was able to be recovered to the wild type by introducing a wild-type pcs gene into the pcs- mutant. Similar results were also obtained from the soil-dwelling bacterium Pseudomonas sp. 593. Our results demonstrate that the absence of PC in bacterial membranes facilitates the translocation of Sec-dependent β-lactamase AmpC from cytoplasm to periplasm, and the enhanced ampicillin-resistance in the pcs- strains mainly comes from effective translocation of AmpC via Sec-pathway.
- Published
- 2017
5. Sinopotamon baokangense sp. nov., a new freshwater crab with spoon-tipped cheliped fingers from Hubei Province, P.R. China (Decapoda, Brachyura, Potamidae)
- Author
-
Yufang Sun, Kelin Chu, and Hongying Sun
- Subjects
0106 biological sciences ,Potamidae ,biology ,Decapoda ,Ecology ,010607 zoology ,Zoology ,P r china ,Aquatic Science ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,Carcinology ,Genus ,GENERAL MORPHOLOGY ,Gonopod ,Animal Science and Zoology ,Freshwater crab - Abstract
A new freshwater crab of the genus Sinopotamon Bott, 1967, S. baokangense sp. nov. (Potamidae), is described from Baokang County, Hubei Province, P.R. China. The new species closely resembles two other Chinese species: S. cochlearidigitum Dai, Chen, Zhang & Lin, 1986, from Fang and Zhushan Counties; and S. introdigitum Dai, Chen, Zhang & Lin, 1986, from Fang and Yun Counties and Shennongjia, in general morphology and their distinctive spoon-tipped cheliped fingers. The new species, however, can easily be distinguished by a number of cheliped, male abdominal, and male first gonopod characters.
- Published
- 2017
6. Out of the Sichuan Basin: Rapid species diversification of the freshwater crabs in Sinopotamon (Decapoda: Brachyura: Potamidae) endemic to China
- Author
-
Ruicong Wang, Hongying Sun, Kelin Chu, Wei Gao, Yufang Sun, Yongkun Ji, and Qiang Zhao
- Subjects
0106 biological sciences ,0301 basic medicine ,Most recent common ancestor ,China ,Time Factors ,Brachyura ,Range (biology) ,Fresh Water ,010603 evolutionary biology ,01 natural sciences ,03 medical and health sciences ,Species Specificity ,Genus ,Genetics ,Animals ,Clade ,Molecular Biology ,Phylogeny ,Ecology, Evolution, Behavior and Systematics ,Cell Nucleus ,Potamidae ,Likelihood Functions ,Geography ,biology ,Ecology ,Genetic Variation ,biology.organism_classification ,Mitochondria ,Phylogeography ,030104 developmental biology ,Taxon ,Freshwater crab - Abstract
Sinopotamon Bott, 1967 is the most speciose and widely distributed freshwater crab genus in East Asia. Our extensive sampling includes about 76% of the known Sinopotamon taxa, and nearly covers its entire distribution area. Based on mitochondrial cytochrome oxidase I (COI) and 16S rRNA, as well as nuclear 28S rRNA and histone H3, we reconstructed the Sinopotamon phylogeny using maximum likelihood and Bayesian approaches. The divergence time was estimated and multiple methods were used to conduct diversification analyses. The ancestral geographic distribution and character state were reconstructed. Three main clades (Clades I, II and III) that roughly correspond to their main geographic distribution ranges were recovered. Our results challenge the current view of the four major species groups based on the morphological differences in the male first gonopod (G1). The most recent common ancestor of Sinopotamon most likely originated from the Sichuan Basin and surrounding mountains (SBSM) and subsequently dispersed throughout central and eastern China. The exceptionally rapid, recent diversification was detected in Clade II. The high incidence of species-level non-monophyly found in Clade II can be explained by recent rapid radiation. Climatic changes, morphological innovations, range expansion and geographical heterogeneity may all contribute to the diversification in Sinopotamon. This study contributes to our knowledge on diversification of freshwater benthic macro-invertebrates in the East Asian inland ecosystem.
- Published
- 2016
7. Different responses of soil microbial metabolic activity to silver and iron oxide nanoparticles
- Author
-
Yufang Sun, Shiying He, Xiangui Lin, Yanfang Feng, Jun Ni, Lihong Xue, Yingliang Yu, Youzhi Feng, and Linzhang Yang
- Subjects
China ,Silver ,Environmental Engineering ,Health, Toxicology and Mutagenesis ,Soil biology ,Microorganism ,Microbial metabolism ,Metal Nanoparticles ,010501 environmental sciences ,Biology ,Real-Time Polymerase Chain Reaction ,Ferric Compounds ,complex mixtures ,01 natural sciences ,Soil Pollutants ,Environmental Chemistry ,Soil ecology ,Soil Microbiology ,0105 earth and related environmental sciences ,Bacteria ,Ecology ,Soil organic matter ,Public Health, Environmental and Occupational Health ,04 agricultural and veterinary sciences ,General Medicine ,General Chemistry ,Nitrification ,Pollution ,Environmental chemistry ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Soil microbiology - Abstract
The knowledge regarding the effects of metal or metal oxide nanoparticles on soil microbial metabolic activity and key ecological functions is limited, relative to the information about their species diversity. For this reason, the responses of soil microbial metabolic activity to silver (AgNPs) and iron oxide (FeONPs) nanoparticles, along concentration gradients of each, were evaluated by microcalorimetry and soil nitrification potential. The changes in abundances of bacteria, eukaryotes and ammonia-oxidizing bacteria were measured by real time quantitative PCR. It was found that AgNP (at 0.1, 1 and 10 mg kg(-1) soil) amendments decreased soil microbial metabolic activity, nitrification potential and the abundances of bacteria and ammonia-oxidizing bacteria; on the contrary, FeONPs had the positive effects on soil microbial metabolic activity (at 1 and 10 mg kg(-1) soil) and soil nitrification potential (at 0.1 and 1 mg kg(-1) soil). Specific microbial metabolic activity and specific nitrification potential further revealed that metal or metal oxide nanoparticles could change the C and N cycles of the agricultural soil through influencing soil microbial metabolism. These findings could deepen the understanding of the influence of NPs on soil microorganisms and their driven soil ecology process.
- Published
- 2016
8. Increased high-sensitivity C-reactive protein, erythrocyte sedimentation rate and lactic acid in stroke patients with internal carotid artery occlusion
- Author
-
Dan Xie, Yong-bo Zhang, Jimei Li, Qin Zhang, Di Hu, and Yufang Sun
- Subjects
medicine.medical_specialty ,Pathology ,Blood lipids ,Disease ,Logistic regression ,Gastroenterology ,Pathogenesis ,03 medical and health sciences ,chemistry.chemical_compound ,inflammatory factors ,0302 clinical medicine ,Clinical Research ,Internal medicine ,medicine ,030212 general & internal medicine ,medicine.diagnostic_test ,biology ,Cholesterol ,business.industry ,C-reactive protein ,lactic acid ,General Medicine ,internal carotid artery occlusion ,Lactic acid ,chemistry ,Erythrocyte sedimentation rate ,biology.protein ,high-sensitivity C-reactive protein ,erythrocyte sedimentation rate ,business ,030217 neurology & neurosurgery - Abstract
Introduction: Internal carotid artery occlusion (ICAO) causes high annual rates of mortality and morbidity. It has been established that atherosclerosis is the normal cause of ICAO. As the pathogenesis of atherosclerosis may involve blood lipids, inflammatory factors and other biomarkers, the aim of this study was to assess the changes in these biomarkers and investigate the relationship between these biomarkers and the development of ICAO in stroke patients. Material and methods: A total of 89 ischaemic stroke inpatients with ICAO (ICAO group) and 89 without ICAO (control group) were studied, retrospectively. The serum was collected from each patient on the 3 rd day of admission, to measure the lipid parameters and biomarkers, e.g. high-sensitivity C-reactive protein (hs-CRP), erythrocyte sedimentation rate (ESR), and lactic acid (LA). Histories were taken including age, gender, smoking history, and disease history. Additional analysis was carried out to compare between the genders and evaluate the association between certain biomarkers and ICAO. Results: Among the 89 ICAO cases in this study, the serum levels of hs-CRP, ESR and LA were significantly higher than those in the control group (p ≤ 0.001). No significant differences were found in the mean levels of total cholesterol, triacylglycerol, HDL cholesterol or glucose, or the known risk factors. Gender also had no influence on these biomarkers. Logistic regression analysis indicated that hs-CRP, ESR and LA were significantly associated with ICAO (p ≤ 0.05). Conclusions: These results suggest that hs-CRP, ESR and LA are associated with ICAO in ischaemic stroke patients, but gender has no effect. Therefore, Hs-CRP, ESR and LA may be useful in the early detection of patients with ICAO.
- Published
- 2016
9. Large-scale de novo transcriptome analysis reveals specific gene expression and novel simple sequence repeats markers in salinized roots of the euhalophyte Salicornia europaea
- Author
-
Xinlong Xiao, Changyan Tian, Gang Huang, Albino Maggio, Yinan Yao, Dayong Zhang, Yufang Sun, Li Li, Michael James Van Oosten, Osama Abdalla Mohamad, Jinbiao Ma, Ma, Jinbiao, Xiao, Xinlong, Li, Li, Maggio, Albino, Zhang, Dayong, Abdelshafy Mohamad, Osama Abdalla, Van Oosten, Michael, Huang, Gang, Sun, Yufang, Tian, Changyan, and Yao, Yinan
- Subjects
0106 biological sciences ,0301 basic medicine ,Genetics ,Rhizosphere ,Salicornia europaea ,biology ,Physiology ,Salicornia europaea root ,Plant physiology ,UniGene ,qRT-PCR ,Context (language use) ,Plant Science ,biology.organism_classification ,01 natural sciences ,Transcriptome ,Illumina/Solexa sequencing ,03 medical and health sciences ,Abiotic stre ,030104 developmental biology ,KEGG ,Agronomy and Crop Science ,Illumina dye sequencing ,010606 plant biology & botany - Abstract
Glycophytic plants suffer from severe stress and injury when roots are exposed to high salinity in the rhizosphere. In contrast, the euhalophyte Salicornia europaea grows well at 200 mM NaCl and can withstand up to 1000 mM NaCl in the root zone. Analysis of gene expression profiles and the underlying molecular mechanisms responsible for this tolerance have been largely overlooked. Using the Illumina sequencing platform and the short-reads assembly programme Trinity, we generated a total of 40 and 39 million clean reads and further 140,086 and 122,728 unigenes from the 200 mM NaCl and 0 mM NaCl treated tissues of S. europaea roots, respectively. All unigenes in this study were functionally annotated within context of the COG, GO and KEGG pathways. Unigene functional annotation analysis allowed us to identify hundreds of ion transporters related to homeostasis and osmotic adaptation as well as a variety of proteins related to cation, amino acid, lipid and sugar transport. We found significant enrichment in response to stress including the functional categories of “antioxidant activity”, “catalytic activity” and “response to stimuli”. These findings represent for a useful resource for the scientific community working on salt tolerance mechanisms. Conversely, a total of 8639 EST-SSRs from 131,594 unigenes were identified and 4539 non-redundant SSRs primers pairs were developed. These data provide a good foundation for future studies on molecular adaptation mechanisms of euhalophytes roots under saline environments and will likely facilitate the identification of critical salt tolerance traits to be transferred in economically important crops.
- Published
- 2018
10. The comparative mitogenomics and phylogenetics of the two grouse-grasshoppers (Insecta, Orthoptera, Tetrigoidea)
- Author
-
Dianfeng Liu, Guofang Jiang, Bo Xiao, and Yufang Sun
- Subjects
0106 biological sciences ,0301 basic medicine ,Orthoptera ,Zoology ,Grasshoppers ,010603 evolutionary biology ,01 natural sciences ,Evolution, Molecular ,03 medical and health sciences ,Phylogenetic ,Orthoptera Tetrigoidea ,Phylogenetics ,Animals ,Acridoidea ,lcsh:QH301-705.5 ,Phylogeny ,Genomic organization ,biology ,Phylogenetic tree ,Orthopteroid ,Base Sequence ,Sequence Analysis, DNA ,biology.organism_classification ,Tetrigoidea ,Mitogenome ,030104 developmental biology ,Sister group ,lcsh:Biology (General) ,Genome, Mitochondrial ,Ensifera ,Research Article - Abstract
Objective This study aimed to reveal the mitochondrial genomes (mtgenomes) of Tetrix japonica and Alulatettix yunnanensis, and the phylogenetics of Orthoptera species. Methods The mtgenomes of A. yunnanensis and T. japonica were firstly sequenced and assembled through partial sequences amplification, and then the genome organization and gene arrangement were analyzed. Based on nucleotide/amino acid sequences of 13 protein-coding genes and whole mtgenomes, phylogenetic trees were established on 37 Orthoptera species and 5 outgroups, respectively. Results Except for a regulation region (A+T rich region), a total of 37 genes were found in mtgenomes of T. japonica and A. yunnanensis, including 13 protein-coding genes, 2 ribosomal RNA genes, and 22 transfer RNA genes, which exhibited similar characters with other Orthoptera species. Phylogenetic tree based on 13 concatenated protein-coding nucleotide sequences were considered to be more suitable for phylogenetic reconstruction of Orthoptera species than amino acid sequences and mtgenomes. The phylogenetic relationships of Caelifera species were Acridoidea and Pamphagoidea > Pyrgomorphoidea > Pneumoroidea > Eumastacoidea > Tetrigoidea > Tridactyloidea. Besides, a sister-group relationship between Tettigonioidea and Rhaphidophoroidea was revealed in Ensifera. Conclusion Concatenated protein-coding nucleotide sequences of 13 genes were suitable for reconstruction of phylogenetic relationship in orthopteroid species. Tridactyloidea was a sister group of Tetrigoidea in Caelifera, and Rhaphidophoroidea was a sister group of Tettigonioidea in Ensifera. Electronic supplementary material The online version of this article (doi:10.1186/s40659-017-0132-9) contains supplementary material, which is available to authorized users.
- Published
- 2017
11. Isolation and Characterization of Microsatellite Loci in the Freshwater Crab Sinopotamon Yangtsekiense and Cross-Species Amplification in Related Taxa (Decapoda: Brachyura)
- Author
-
Qiang Zhao, Naifa Liu, Yue Zhao, Yufang Sun, Hongying Sun, and Guanghui Qian
- Subjects
Potamidae ,Genetics ,education.field_of_study ,biology ,Population ,Locus (genetics) ,Aquatic Science ,biology.organism_classification ,Loss of heterozygosity ,Evolutionary biology ,Microsatellite ,Allele ,education ,Genotyping ,Freshwater crab - Abstract
A total of twenty microsatellite loci included dinucleotide, trinucleotide, and tetranucleotide microsatellite loci were isolated for Sinopotamon yangtsekiense using the FIASCO protocol. Genotyping of 30 individuals showed that the number of alleles ranged from 2 to 22, with observed heterozygosity ranging from 0.103 to 0.900 and expected heterozygosity ranging from 0.100 to 0.957. The polymorphism information content per locus ranged from 0.093 to 0.932. Cross-species amplification was investigated in seven related taxa. The results suggested that the developed microsatellite loci are specific to Sinopotamon and have potential for limited use in cross-genus amplification within Potamidae. These microsatellite markers should prove valuable tools for population genetic studies of the species Sinopotamon.
- Published
- 2009
12. Patterns of diversity, areas of endemism, and multiple glacial refuges for freshwater crabs of the genus Sinopotamon in China (Decapoda: Brachyura: Potamidae)
- Author
-
Congtian Lin, Qiang Zhao, Naifa Liu, Junying Zhou, Feng Ge, Yufang Sun, Hongying Sun, Juanjuan Xu, Wei Gao, and Fang Fang
- Subjects
China ,Pleistocene ,Range (biology) ,Brachyura ,Climate ,lcsh:Medicine ,Biology ,Models, Biological ,Animals ,Glacial period ,Endemism ,lcsh:Science ,Ecosystem ,Ecological niche ,Potamidae ,Freshwater Ecology ,Multidisciplinary ,Ecology ,lcsh:R ,Species diversity ,Biodiversity ,biology.organism_classification ,Phylogeography ,Biogeography ,Regression Analysis ,lcsh:Q ,Research Article ,Ecological Environments ,Freshwater Environments - Abstract
Previous research has shown that the geographical distribution patterns of freshwater fishes and amphibians have been influenced by past climatic oscillations in China resulting from Pleistocene glacial activity. However, it remains unknown how these past changes have impacted the present-day distribution of Chinese freshwater crabs. This work describes the diversity and endemism of freshwater crabs belonging to Sinopotamon, a highly speciose genus endemic to China, and evaluates its distribution in terms of topography and past climatic fluctuations. Species diversity within Sinopotamon was found to be concentrated in an area from the northeastern edge of the Yunnan-Guizhou Plateau to the Jiangnan Hills, and three areas of endemism were identified. Multiple regression analysis between current climatic variables and Sinopotamon diversity suggested that regional annual precipitation, minimum temperature in the coldest month, and annual temperature range significantly influenced species diversity and may explain the diversity patterns of Sinopotamon. A comparison of ecological niche models (ENMs) between current conditions and the last glacial maximum (LGM) showed that suitable habitat for Sinopotamon in China severely contracted during the LGM. The coincidence of ENMs and the areas of endemism indicated that southeast of the Daba Mountains, and central and southeastern China, are potential Pleistocene refuges for Sinopotamon. The presence of multiple Pleistocene refuges within the range of this genus could further promote inter- and intraspecific differentiations, and may have led to high Sinopotamon species diversity, a high endemism rate and widespread distribution.
- Published
- 2012
13. Enhanced Muscle Growth by Plasmid-Mediated Delivery of Myostatin Propeptide
- Author
-
Xudong Cao, Jingliang Sheng, Chuangfu Chen, Jun Qiao, Shengwei Hu, and Yufang Sun
- Subjects
Male ,medicine.medical_specialty ,Article Subject ,lcsh:Biotechnology ,Health, Toxicology and Mutagenesis ,lcsh:Medicine ,Myostatin ,lcsh:Chemical technology ,lcsh:Technology ,Muscle hypertrophy ,Mice ,lcsh:TP248.13-248.65 ,Internal medicine ,Myokine ,Genetics ,medicine ,Animals ,Myocyte ,lcsh:TP1-1185 ,Muscle, Skeletal ,Molecular Biology ,biology ,lcsh:T ,lcsh:R ,Skeletal muscle ,Organ Size ,General Medicine ,musculoskeletal system ,Genetic Enhancement ,Cardiac muscle hypertrophy ,medicine.anatomical_structure ,Endocrinology ,GDF11 ,biology.protein ,Molecular Medicine ,Plasmids ,Research Article ,Biotechnology ,Transforming growth factor - Abstract
Myostatin is a member of the transforming growth factor beta (TGF-β) superfamily that functions as a negative regulator of skeletal muscle development and growth. Myostatin blockade therefore offers a strategy for promoting muscle growth in livestock production without resorting to genetic manipulation. In this report, we examined the effect of myostatin inhibition by plasmid-mediated delivery of a mutant myostatin propeptide (MProD76A), a natural inhibitor of myostatin, on the growth performance of mice. A significant increase in skeletal muscle mass was observed after a single intramuscular injection of naked plasmid DNA encoding MProD76A into mice. Enhanced muscle growth occurred because of myofiber hypertrophy, but no cardiac muscle hypertrophy and organomegaly was observed in the mice after myostatin inhibition by plasmid-mediated MProD76A delivery. These results demonstrate a promising approach to enhancing muscle growth that warrants further investigation in domestic animals.
- Published
- 2010
- Full Text
- View/download PDF
14. Secretory expression of nattokinase from Bacillus subtilis YF38 in Escherichia coli
- Author
-
Xiuzhu Chen, Xiaobo Liang, Jin Zhong, Shifang Jia, Liandong Huan, Meiling Chen, and Yufang Sun
- Subjects
Signal peptide ,Gene Expression ,Bioengineering ,Bacillus subtilis ,medicine.disease_cause ,Applied Microbiology and Biotechnology ,Biochemistry ,Models, Biological ,law.invention ,chemistry.chemical_compound ,law ,medicine ,Escherichia coli ,Protease Inhibitors ,Subtilisins ,Cloning, Molecular ,Molecular Biology ,chemistry.chemical_classification ,biology ,Fibrinolysis ,Secretory Vesicles ,Subtilisin ,Temperature ,Periplasmic space ,Gene Expression Regulation, Bacterial ,Sequence Analysis, DNA ,Hydrogen-Ion Concentration ,biology.organism_classification ,Molecular biology ,Enzyme ,chemistry ,Recombinant DNA ,Nattokinase ,Biotechnology - Abstract
Nattokinase producing bacterium, B. subtilis YF38, was isolated from douchi, using the fibrin plate method. The gene encoding this enzyme was cloned by polymerase chain reaction (PCR). Cytoplasmic expression of this enzyme in E. coli resulted in inactive inclusion bodies. But with the help of two different signal peptides, the native signal peptide of nattokinase and the signal peptide of PelB, active nattokinase was successfully expressed in E. coli with periplasmic secretion, and the nattokinase in culture medium displayed high fibrinolytic activity. The fibrinolytic activity of the expressed enzyme in the culture was determined to reach 260 urokinase units per micro-liter when the recombinant strain was induced by 0.7 mmol l(-1) isopropyl-beta-D- thiogalactopyranoside (IPTG) at 20 degrees C for 20 h, resulting 49.3 mg active enzyme per liter culture. The characteristic of this recombinant nattokinase is comparable to the native nattokinase from B. subtilis YF38. Secretory expression of nattokinase in E. coli would facilitate the development of this enzyme into a therapeutic product for the control and prevention of thrombosis diseases.
- Published
- 2007
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.