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Xie N, Guo Q, Li H, Yuan G, Gui Q, Xiao Y, Liao M, Yang L. Correction: Integrated transcriptomic and WGCNA analyses reveal candidate genes regulating mainly flavonoid biosynthesis in Litsea coreana var. Sinensis. BMC Plant Biol 2024; 24:328. [PMID: 38664607 PMCID: PMC11044540 DOI: 10.1186/s12870-024-05013-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/29/2024]
Affiliation(s)
- Na Xie
- Institute for Forest Resources and Environment of Guizhou, College of Forestry, Guizhou University, Guiyang, 550025, China
| | - Qiqiang Guo
- Institute for Forest Resources and Environment of Guizhou, College of Forestry, Guizhou University, Guiyang, 550025, China.
| | - Huie Li
- College of Agriculture, Guizhou University, Guiyang, 550025, China
| | - Gangyi Yuan
- Institute for Forest Resources and Environment of Guizhou, College of Forestry, Guizhou University, Guiyang, 550025, China
| | - Qin Gui
- Institute for Forest Resources and Environment of Guizhou, College of Forestry, Guizhou University, Guiyang, 550025, China
| | - Yang Xiao
- Institute for Forest Resources and Environment of Guizhou, College of Forestry, Guizhou University, Guiyang, 550025, China
| | - Mengyun Liao
- Institute for Forest Resources and Environment of Guizhou, College of Forestry, Guizhou University, Guiyang, 550025, China
| | - Lan Yang
- Institute for Forest Resources and Environment of Guizhou, College of Forestry, Guizhou University, Guiyang, 550025, China
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Xiao Y, Guo Q, Xie N, Yuan G, Liao M, Gui Q, Ding G. Predicting the global potential distribution of Bursaphelenchus xylophilus using an ecological niche model: expansion trend and the main driving factors. BMC Ecol Evol 2024; 24:48. [PMID: 38632522 PMCID: PMC11022495 DOI: 10.1186/s12862-024-02234-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 04/01/2024] [Indexed: 04/19/2024] Open
Abstract
Bursaphelenchus xylophilus (Steiner&Buhrer) Nickle is a global quarantine pest that causes devastating mortality in pine species. The rapid and uncontrollable parasitic spread of this organism results in substantial economic losses to pine forests annually. In this study, we used the MaxEnt model and GIS software ArcGIS10.8 to predict the distribution of B. xylophilus based on collected distribution points and 19 environmental variables (with a correlation coefficient of|R| > 0.8) for the contemporary period (1970-2000), 2041-2060 (2050s), 2061-2080 (2070s), and 2081-2100 (2090s) under four shared socioeconomic pathways (SSPs). We conducted a comprehensive analysis of the key environmental factors affecting the geographical distribution of B. xylophilus and suitable distribution areas. Our results indicate that in current prediction maps B. xylophilus had potential suitable habitats in all continents except Antarctica, with East Asia being the region with the most highly suitable areas and the most serious epidemic area currently. Precipitation of the warmest quarter, temperature seasonality, precipitation of the wettest month, and maximum temperature of the warmest month were identified as key environmental variables that determine the distribution of B. xylophilus. Under future climatic conditions, the potential geographic distribution of B. xylophilus will expand relative to current conditions. In particular, under the SSP5-8.5 scenario in 2081-2100, suitable areas will expand to higher latitudes, and there will be significant changes in suitable areas in Europe, East Asia, and North America. These findings are crucial for future prevention and control management and monitoring.
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Affiliation(s)
- Yang Xiao
- Institute for Forest Resources & Environment of Guizhou, Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province, College of Forestry, Guizhou University, 550025, Guiyang, PR China
| | - Qiqiang Guo
- Institute for Forest Resources & Environment of Guizhou, Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province, College of Forestry, Guizhou University, 550025, Guiyang, PR China.
| | - Na Xie
- Institute for Forest Resources & Environment of Guizhou, Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province, College of Forestry, Guizhou University, 550025, Guiyang, PR China
| | - Gangyi Yuan
- Institute for Forest Resources & Environment of Guizhou, Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province, College of Forestry, Guizhou University, 550025, Guiyang, PR China
| | - Mengyun Liao
- Institute for Forest Resources & Environment of Guizhou, Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province, College of Forestry, Guizhou University, 550025, Guiyang, PR China
| | - Qin Gui
- Institute for Forest Resources & Environment of Guizhou, Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province, College of Forestry, Guizhou University, 550025, Guiyang, PR China
| | - Guijie Ding
- Institute for Forest Resources & Environment of Guizhou, Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province, College of Forestry, Guizhou University, 550025, Guiyang, PR China
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Xie N, Guo Q, Li H, Yuan G, Gui Q, Xiao Y, Liao M, Yang L. Integrated transcriptomic and WGCNA analyses reveal candidate genes regulating mainly flavonoid biosynthesis in Litsea coreana var. sinensis. BMC Plant Biol 2024; 24:231. [PMID: 38561656 PMCID: PMC10985888 DOI: 10.1186/s12870-024-04949-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 03/26/2024] [Indexed: 04/04/2024]
Abstract
Litsea coreana Levl. var. sinensis (Allen) Yang et P. H. Huang is a popular ethnic herb and beverage plant known for its high flavonoid content, which has been linked to a variety of pharmacological benefits and crucial health-promoting impacts in humans. The progress in understanding the molecular mechanisms of flavonoid accumulation in this plant has been hindered due to the deficiency of genomic and transcriptomic resources. We utilized a combination of Illumina and Oxford Nanopore Technology (ONT) sequencing to generate a de novo hybrid transcriptome assembly. In total, 126,977 unigenes were characterized, out of which 107,977 were successfully annotated in seven public databases. Within the annotated unigenes, 3,781 were categorized into 58 transcription factor families. Furthermore, we investigated the presence of four valuable flavonoids-quercetin-3-O-β-D-galactoside, quercetin-3-O-β-D-glucoside, kaempferol-3-O-β-D-galactoside, and kaempferol-3-O-β-D-glucoside in 98 samples, using high-performance liquid chromatography. A weighted gene co-expression network analysis identified two co-expression modules, MEpink and MEturquoise, that showed strong positive correlation with flavonoid content. Within these modules, four transcription factor genes (R2R3-MYB, NAC, WD40, and ARF) and four key enzyme-encoding genes (CHI, F3H, PAL, and C4H) emerged as potential hub genes. Among them, the R2R3-MYB (LcsMYB123) as a homologous gene to AtMYB123/TT2, was speculated to play a significant role in flavonol biosynthesis based on phylogenetic analysis. Our findings provided a theoretical foundation for further research into the molecular mechanisms of flavonoid biosynthesis. Additionally, The hybrid transcriptome sequences will serve as a valuable molecular resource for the transcriptional annotation of L. coreana var. sinensis, which will contribute to the improvement of high-flavonoid materials.
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Affiliation(s)
- Na Xie
- Institute for Forest Resources and Environment of Guizhou, College of Forestry, Guizhou University, Guiyang, 550025, China
| | - Qiqaing Guo
- Institute for Forest Resources and Environment of Guizhou, College of Forestry, Guizhou University, Guiyang, 550025, China.
| | - Huie Li
- College of Agriculture, Guizhou University, Guiyang, 550025, China
| | - Gangyi Yuan
- Institute for Forest Resources and Environment of Guizhou, College of Forestry, Guizhou University, Guiyang, 550025, China
| | - Qin Gui
- Institute for Forest Resources and Environment of Guizhou, College of Forestry, Guizhou University, Guiyang, 550025, China
| | - Yang Xiao
- Institute for Forest Resources and Environment of Guizhou, College of Forestry, Guizhou University, Guiyang, 550025, China
| | - Mengyun Liao
- Institute for Forest Resources and Environment of Guizhou, College of Forestry, Guizhou University, Guiyang, 550025, China
| | - Lan Yang
- Institute for Forest Resources and Environment of Guizhou, College of Forestry, Guizhou University, Guiyang, 550025, China
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Lewis JP, Gui Q. Iron Deficiency Modulates Metabolic Landscape of Bacteroidetes Promoting Its Resilience during Inflammation. Microbiol Spectr 2023; 11:e0473322. [PMID: 37314331 PMCID: PMC10434189 DOI: 10.1128/spectrum.04733-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 05/05/2023] [Indexed: 06/15/2023] Open
Abstract
Bacteria have to persist under low iron conditions in order to adapt to the nutritional immunity of a host. Since the knowledge of iron stimulon of Bacteroidetes is sparse, we examined oral (Porphyromonas gingivalis and Prevotella intermedia) and gut (Bacteroides thataiotaomicron) representatives for their ability to adapt to iron deplete and iron replete conditions. Our transcriptomics and comparative genomics analysis show that many iron-regulated mechanisms are conserved within the phylum. They include genes upregulated in low iron, as follows: fldA (flavodoxin), hmu (hemin uptake operon), and loci encoding ABC transporters. Downregulated genes were frd (ferredoxin), rbr (rubrerythrin), sdh (succinate dehydrogenase/fumarate reductase), vor (oxoglutarate oxidoreductase/dehydrogenase), and pfor (pyruvate:ferredoxin/flavodoxin oxidoreductase). Some genus-specific mechanisms, such as the sus of B. thetaiotaomicron coding for carbohydrate metabolism and the xusABC coding for xenosiderophore utilization were also identified. While all bacteria tested in our study had the nrfAH operon coding for nitrite reduction and were able to reduce nitrite levels present in culture media, the expression of the operon was iron dependent only in B. thetaiotaomicron. It is noteworthy that we identified a significant overlap between regulated genes found in our study and the B. thetaiotaomicron colitis study (W. Zhu, M. G. Winter, L. Spiga, E. R. Hughes et al., Cell Host Microbe 27:376-388, 2020, http://dx.doi.org/10.1016/j.chom.2020.01.010). Many of those commonly regulated genes were also iron regulated in the oral bacterial genera. Overall, this work points to iron being the master regulator enabling bacterial persistence in the host and paves the way for a more generalized investigation of the molecular mechanisms of iron homeostasis in Bacteroidetes. IMPORTANCE Bacteroidetes are an important group of anaerobic bacteria abundant both in the oral and gut microbiomes. Although iron is a required nutrient for most living organisms, the molecular mechanisms of adaptation to the changing levels of iron are not well known in this group of bacteria. We defined the iron stimulon of Bacteroidetes by examination of the transcriptomic response of Porphyromonas gingivalis and Prevotella intermedia (both belong to the oral microbiome) and Bacteroidetes thetaiotaomicron (belongs to the gut microbiome). Our results indicate that many of the iron-regulated operons are shared among the three genera. Furthermore, using bioinformatics analysis, we identified a significant overlap between our in vitro studies and transcriptomic data derived from a colitis study, thus underscoring the biological significance of our work. Defining the iron-dependent stimulon of Bacteroidetes can help to identify the molecular mechanisms of iron-dependent regulation as well as better understand the persistence of the anaerobes in the human host.
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Affiliation(s)
- Janina P. Lewis
- Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, USA
- Department of Microbiology and Immunology, Virginia Commonwealth University, Richmond, Virginia, USA
- Department of Biochemistry, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Qin Gui
- Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, USA
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Trotter VV, Shatsky M, Price MN, Juba TR, Zane GM, De León KB, Majumder ELW, Gui Q, Ali R, Wetmore KM, Kuehl JV, Arkin AP, Wall JD, Deutschbauer AM, Chandonia JM, Butland GP. Large-scale genetic characterization of the model sulfate-reducing bacterium, Desulfovibrio vulgaris Hildenborough. Front Microbiol 2023; 14:1095191. [PMID: 37065130 PMCID: PMC10102598 DOI: 10.3389/fmicb.2023.1095191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 03/10/2023] [Indexed: 04/03/2023] Open
Abstract
Sulfate-reducing bacteria (SRB) are obligate anaerobes that can couple their growth to the reduction of sulfate. Despite the importance of SRB to global nutrient cycles and their damage to the petroleum industry, our molecular understanding of their physiology remains limited. To systematically provide new insights into SRB biology, we generated a randomly barcoded transposon mutant library in the model SRB Desulfovibrio vulgaris Hildenborough (DvH) and used this genome-wide resource to assay the importance of its genes under a range of metabolic and stress conditions. In addition to defining the essential gene set of DvH, we identified a conditional phenotype for 1,137 non-essential genes. Through examination of these conditional phenotypes, we were able to make a number of novel insights into our molecular understanding of DvH, including how this bacterium synthesizes vitamins. For example, we identified DVU0867 as an atypical L-aspartate decarboxylase required for the synthesis of pantothenic acid, provided the first experimental evidence that biotin synthesis in DvH occurs via a specialized acyl carrier protein and without methyl esters, and demonstrated that the uncharacterized dehydrogenase DVU0826:DVU0827 is necessary for the synthesis of pyridoxal phosphate. In addition, we used the mutant fitness data to identify genes involved in the assimilation of diverse nitrogen sources and gained insights into the mechanism of inhibition of chlorate and molybdate. Our large-scale fitness dataset and RB-TnSeq mutant library are community-wide resources that can be used to generate further testable hypotheses into the gene functions of this environmentally and industrially important group of bacteria.
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Affiliation(s)
- Valentine V. Trotter
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
| | - Maxim Shatsky
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
| | - Morgan N. Price
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
| | - Thomas R. Juba
- Department of Biochemistry, University of Missouri, Columbia, MO, United States
| | - Grant M. Zane
- Department of Biochemistry, University of Missouri, Columbia, MO, United States
| | - Kara B. De León
- Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK, United States
| | - Erica L.-W. Majumder
- Department of Bacteriology, University of Wisconsin-Madison, Madison, WI, United States
| | - Qin Gui
- Department of Biochemistry, University of Missouri, Columbia, MO, United States
| | - Rida Ali
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
| | - Kelly M. Wetmore
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
| | - Jennifer V. Kuehl
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
| | - Adam P. Arkin
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
- Department of Bioengineering, University of California, Berkeley, Berkeley, CA, United States
| | - Judy D. Wall
- Department of Biochemistry, University of Missouri, Columbia, MO, United States
| | - Adam M. Deutschbauer
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
- Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA, United States
| | - John-Marc Chandonia
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
| | - Gareth P. Butland
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
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Graham JE, Niks D, Zane GM, Gui Q, Hom K, Hille R, Wall JD, Raman CS. How a Formate Dehydrogenase Responds to Oxygen: Unexpected O 2 Insensitivity of an Enzyme Harboring Tungstopterin, Selenocysteine, and [4Fe–4S] Clusters. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joel E. Graham
- Department of Pharmaceutical Sciences, University of Maryland, Baltimore, Maryland21201, United States
| | - Dimitri Niks
- Department of Biochemistry, University of California, Riverside, California92521, United States
| | - Grant M. Zane
- Department of Biochemistry, University of Missouri, Columbia, Missouri65211, United States
| | - Qin Gui
- Department of Biochemistry, University of Missouri, Columbia, Missouri65211, United States
| | - Kellie Hom
- Department of Pharmaceutical Sciences, University of Maryland, Baltimore, Maryland21201, United States
| | - Russ Hille
- Department of Biochemistry, University of California, Riverside, California92521, United States
| | - Judy D. Wall
- Department of Biochemistry, University of Missouri, Columbia, Missouri65211, United States
| | - C. S. Raman
- Department of Pharmaceutical Sciences, University of Maryland, Baltimore, Maryland21201, United States
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Gui Q, Lyons DJ, Deeb JG, Belvin BR, Hoffman PS, Lewis JP. Non-human Primate Macaca mulatta as an Animal Model for Testing Efficacy of Amixicile as a Targeted Anti-periodontitis Therapy. Front Oral Health 2022; 2:752929. [PMID: 35048063 PMCID: PMC8757802 DOI: 10.3389/froh.2021.752929] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 09/30/2021] [Indexed: 01/15/2023] Open
Abstract
Periodontitis is an inflammatory condition triggered by selected oral microbiota; thus treatment strategies should be aimed at reducing the abundance of the pathogenic bacteria. An obstacle to preclinical testing of such strategies is the availability of reliable animal models. Here, a non-human primate (NHP), Macaca mulatta, was used to examine the effectiveness of a novel antimicrobial, amixicile, which inhibits pyruvate–ferredoxin oxidoreductase (PFOR) present in anaerobic bacteria. Animals were assessed for their periodontal health, including radiography, clinical attachment loss (CAL), presence of plaque (PI), bleeding on probing (BOP) and pocket depth (PD), and sampled for saliva, gingival crevicular fluid (GCF), and subgingival plaque to determine their baseline clinical status. Amixicile was then administered for 2 weeks (40 mg/kg/day) and the animals were monitored for periodontal health immediately after the antibiotic treatment, then at 1 month-, 3 months-, and 6-months posttreatment. Microbial species present in plaque and saliva were determined through 16S rDNA sequencing. Baseline assessment of the microbiome has shown a significant proportion of bacteria belonging to the Streptococcus, Haemophilus, Porphyromonas, Gemella, and Fusobacterium genera. The abundance of Porphyromonas and Fusobacterium was reduced following treatment with amixicile, whereas that of Escherichia, Haemophilus, and Gemella were elevated. CAL, PD, and BOP were also significantly reduced following the treatment. In conclusion, the NHP model proves useful for preclinical studies of strategies targeting selected members of the oral microbiome. We show that amixicile reduces the levels of anaerobic bacteria under in vivo conditions, correlating with a reduction in CAL, PD, and BOP, thus validating its usefulness as an antimicrobial strategy.
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Affiliation(s)
- Qin Gui
- Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, VA, United States
| | - Denver J Lyons
- Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, VA, United States.,Department of Periodontics, Virginia Commonwealth University, Richmond, VA, United States
| | - Janina Golob Deeb
- Department of Periodontics, Virginia Commonwealth University, Richmond, VA, United States
| | - B Ross Belvin
- Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, VA, United States
| | - Paul S Hoffman
- Department of Medicine, Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, United States
| | - Janina P Lewis
- Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, VA, United States.,Department of Microbiology and Immunology, Virginia Commonwealth University, Richmond, VA, United States.,Department of Biochemistry, Virginia Commonwealth University, Richmond, VA, United States
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Wang J, Li B, Huang D, Norat P, Grannonico M, Cooper RC, Gui Q, Chow WN, Liu X, Yang H. Nano-in-Nano Dendrimer Gel Particles for Efficient Topical Delivery of Antiglaucoma Drugs into the Eye. Chem Eng J 2021; 425:130498. [PMID: 34121919 PMCID: PMC8194049 DOI: 10.1016/j.cej.2021.130498] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Low bioavailability of topically applied drugs remains a significant challenge for long-term glaucoma therapy. To enhance drug delivery efficiency, we developed dendrimer gel particles that collectively exhibit structural benefits of dendrimer, hydrogel, and particles, using the inverse emulsion method coupled with the highly efficient aza-Michael addition reaction (IEaMA). This hierarchical approach would maximize the utility of the structural features of existing ocular drug delivery systems. We have tested the delivery efficiency and efficacy of two first-line antiglaucoma drugs, brimonidine tartrate (BT) and timolol maleate (TM), which were loaded into dendrimer gel particles of various sizes, i.e., nDHP (nano-in-nano dendrimer hydrogel particles, ~200 nm), μDHP3 (3 μm), and μDHP10 (9 μm). We found that nDHP was superior to μDHP3 and μDHP10 in terms of cytocompatibility, degradability, drug release kinetics, and corneal permeability. The nDHPs increased drug corneal permeability by 17-fold compared to plain drug solution and enabled zero-order prolonged drug release kinetics. The nDHP-based formulation demonstrated pronounced IOP-lowering effects in both single-dose test and 7-day chronic daily dosing test in both Brown Norway rats and glaucoma mice. Taken together, we have developed nano-in-nano dendrimer gel particles for precise dosing and enabling sustained and synergistic efficacy of antiglaucoma drugs, which could be clinically impactful for improving glaucoma treatment.
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Affiliation(s)
- Juan Wang
- College of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Boxuan Li
- Tianjin Key Laboratory of Biomedical Materials, Key Laboratory of Biomaterials and Nanotechnology for Cancer Immunotherapy, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, China
| | - Da Huang
- Linda and Bipin Doshi Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology, Rolla, Missouri 65409, United States
| | - Pedro Norat
- Department of Biology, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Marta Grannonico
- Department of Biology, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Remy C. Cooper
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia 23298, United States
| | - Qin Gui
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, Virginia 23219, United States
| | - Woon Nam Chow
- Department of Pathology, Virginia Commonwealth University, Richmond, Virginia 23298, United States
- Department of Ophthalmology, Virginia Commonwealth University, Richmond, Virginia 23298, United States
| | - Xiaorong Liu
- Department of Biology, University of Virginia, Charlottesville, Virginia 22904, United States
- Department of Psychology, University of Virginia, Charlottesville, Virginia 22904, United States
- Corresponding authors: (XL), (HY)
| | - Hu Yang
- Linda and Bipin Doshi Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology, Rolla, Missouri 65409, United States
- Corresponding authors: (XL), (HY)
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Liu Z, He L, Gui Q, Yuan Y, Zhang H. Preparation, property manipulation and application of ɑ-cyanostilbene-containing photoresponsive liquid crystal elastomers with different alkoxy tail length. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Gui Q, Hoffman PS, Lewis JP. Erratum to 'Amixicile targets anaerobic bacteria within the oral microbiome' [J Oral BioSci vol 61 (2019) 226-235]. J Oral Biosci 2020; 62:297. [PMID: 32950129 DOI: 10.1016/j.job.2020.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Qin Gui
- Philips Institute of Oral Health Research, Richmond, VA, USA
| | - Paul S Hoffman
- Department of Medicine, Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA
| | - Janina P Lewis
- Philips Institute of Oral Health Research, Richmond, VA, USA; Department of Microbiology and Immunology, Virginia Commonwealth University, Richmond, VA, USA; Department of Biochemistry, Virginia Commonwealth University, Richmond, VA, USA.
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Li B, Wang J, Gui Q, Yang H. Drug-loaded chitosan film prepared via facile solution casting and air-drying of plain water-based chitosan solution for ocular drug delivery. Bioact Mater 2020; 5:577-583. [PMID: 32405573 PMCID: PMC7210375 DOI: 10.1016/j.bioactmat.2020.04.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 04/15/2020] [Accepted: 04/15/2020] [Indexed: 12/01/2022] Open
Abstract
Chitosan is a nature-based polymer with low toxicity, excellent biocompatibility and biodegradability. However, the intractable solubility of chitosan in water and most conventional solvents hampers its biomedical applications. Following the dissolution method for dissolving chitosan in plain water developed by us, chitosan was dissolved in ionic liquid followed by overnight freezing at -20 °C and subsequent solvent exchange with plain water at room temperature. In this study, we fabricated a drug-carrying chitosan film via solution casting and air-drying by using the plain water-based chitosan solution. Specifically, brimonidine tartrate (BT), an antiglaucoma drug, was dissolved in the plain-water based solution and used to prepare BT-loaded chitosan film, i.e., chitosan-BT film. The resulting film is transparent, structurally stable, and mucoadhesive. Micro-sized antiglaucoma BT drug crystals form and are well dispersed in the chitosan film. The chitosan-BT film enables BT to have a high corneal permeability with fast drug release kinetics for potential ocular drug delivery.
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Affiliation(s)
- Boxuan Li
- Tianjin Key Laboratory of Biomedical Materials, Key Laboratory of Biomaterials and Nanotechnology for Cancer Immunotherapy, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, China
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, VA, 23219, United States
| | - Juan Wang
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, VA, 23219, United States
- College of Materials Science and Engineering, Sichuan University, Chengdu, Sichuan, 610065, China
| | - Qin Gui
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, VA, 23219, United States
| | - Hu Yang
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, VA, 23219, United States
- Department of Pharmaceutics, Virginia Commonwealth University, Richmond, VA, 23298, United States
- Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, 23298, United States
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Gui Q, Ramsey KW, Hoffman PS, Lewis JP. Amixicile depletes the ex vivo periodontal microbiome of anaerobic bacteria. J Oral Biosci 2020; 62:195-204. [PMID: 32278683 DOI: 10.1016/j.job.2020.03.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 03/25/2020] [Accepted: 03/27/2020] [Indexed: 12/23/2022]
Abstract
OBJECTIVES Although periodontal diseases result from overgrowth of anaerobic bacteria, the effect of a specific knockdown of anaerobes on the disease outcome has yet to be examined. We have reported that amixicile, a non-toxic, readily bioavailable, and novel antimicrobial, specifically targets selected oral anaerobes through inhibition of the activity of pyruvate ferredoxin oxidoreductase (PFOR), a major enzyme mediating oxidative decarboxylation of pyruvate. METHODS Here, we generated an ex vivo microbiome derived from gingival pockets of human subjects with chronic periodontal disease and evaluated the efficacy of amixicile in generating a specific knockdown of anaerobic bacteria present in the microbiome. RESULTS Our bioinformatics analysis identified PFOR-like coding capacity in over 100 genomes available from the HOMD database. Many of those bacteria were present in our ex vivo microbiome. Significantly, the anaerobic pathogens relying on PFOR for energy generation were specifically reduced in abundance following treatment with amixicile while non-PFOR bacteria were spared. Specifically, Prevotella, Veillonella, Slackia, Porphyromonas, Treponema, Megasphera, and Atobium were reduced in abundance. Such treatment resulted in the conversion of a microbiome resembling a microbiome derived from sites with periodontal disease to one resembling a microbiome present at healthy sites. We also compared the inhibitory spectrum of amixicile to that of metronidazole and showed that the antibiotics have a similar inhibitory spectrum. CONCLUSIONS This work further demonstrates that amixicile has the potential to reverse and prevent the outgrowth of anaerobic pathogens observed in subjects with periodontal disease.
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Affiliation(s)
- Qin Gui
- Philips Institute for Oral Health Research, Virginia Commonwealth University, 521 North 11th Street, Richmond, VA, 23298, USA.
| | - Kane W Ramsey
- Philips Institute for Oral Health Research, Virginia Commonwealth University, 521 North 11th Street, Richmond, VA, 23298, USA; Department of Periodontics, Virginia Commonwealth University, 521 North 11th Street, Richmond, VA, 23298, USA.
| | - Paul S Hoffman
- Department of Medicine, Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA.
| | - Janina P Lewis
- Philips Institute for Oral Health Research, Virginia Commonwealth University, 521 North 11th Street, Richmond, VA, 23298, USA; Department of Microbiology and Immunology, Virginia Commonwealth University, 521 North 11th Street, Richmond, VA, 23298, USA; Department of Biochemistry Virginia Commonwealth University, Richmond, VA, USA.
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Wang J, Li B, Pu X, Wang X, Cooper RC, Gui Q, Yang H. Injectable Multicomponent Biomimetic Gel Composed of Inter-Crosslinked Dendrimeric and Mesoporous Silica Nanoparticles Exhibits Highly Tunable Elasticity and Dual Drug Release Capacity. ACS Appl Mater Interfaces 2020; 12:10202-10210. [PMID: 32023033 PMCID: PMC10983814 DOI: 10.1021/acsami.0c01395] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
There is a growing need for cartilage defect grafts that are structurally adaptable to possess multifaceted functions to promote bone regeneration, sustain medication efficacy, and preferably remain injectable but solidify quickly upon injection. In this work, we developed an injectable multicomponent biomimetic gel (MBG) by integrating polyamidoamine dendrimer G3 (G3), mesoporous silica nanoparticles (MSNs), and dendrimer-templated silver nanoparticles (G3-Ag) into a well-defined cross-linked network. MBGs composed of one particulate component (G3 alone), i.e., MBG-1, two particulate components (G3 and MSN-NH2), i.e., MBG-2, and three particulate components (G3, MSN-NH2, and G3-Ag), i.e., MBG-3, were prepared by inter-cross-linking dendrimeric and mesoporous silica nanoparticles with poly(ethylene glycol) diglycidyl ether (PEG-DGE, Mn = 2000 g/mol) via the facile amine-epoxy click reaction. The water-soluble antibiotic isoniazid was loaded to the cross-linked PEG network, whereas the hydrophobic antibiotic rifampicin was encapsulated into mesoporous MSNs. Our studies revealed that elasticity and mechanical strengths could be modulated and enhanced significantly with the inclusion of MSNs and silver nanoparticles. Isoniazid was released rapidly while rifampicin was released over an extended period of time. In addition, MBGs showed injectability, high swelling capacity, structural stability, and cytocompatibility. Taken together, MBGs have shown structural features that allow for the development of injectable gel grafts with the ability to promote cartilage defect repair and offer antibiotic medication benefits.
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Affiliation(s)
- Juan Wang
- College of Materials Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, China
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, Virginia 23219, United States
| | - Boxuan Li
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, Virginia 23219, United States
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China
| | - Ximing Pu
- College of Materials Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Xingming Wang
- College of Materials Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Remy C Cooper
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Qin Gui
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, Virginia 23219, United States
| | - Hu Yang
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, Virginia 23219, United States
- Department of Pharmaceutics, Virginia Commonwealth University, Richmond, Virginia 23298, United States
- Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia 23298, United States
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Li B, Wang J, Gui Q, Yang H. Continuous production of uniform chitosan beads as hemostatic dressings by a facile flow injection method. J Mater Chem B 2020; 8:7941-7946. [DOI: 10.1039/d0tb01462a] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, we developed a facile flow injection method to fabricate chitosan beads of uniform size in a continuous manner and assessed their properties as hemostatic dressings.
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Affiliation(s)
- Boxuan Li
- Tianjin Key Laboratory of Biomedical Materials
- Key Laboratory of Biomaterials and Nanotechnology for Cancer Immunotherapy
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Tianjin 300192
| | - Juan Wang
- Department of Chemical and Life Science Engineering
- Virginia Commonwealth University
- Richmond
- USA
- College of Biomedical Engineering
| | - Qin Gui
- Department of Chemical and Life Science Engineering
- Virginia Commonwealth University
- Richmond
- USA
| | - Hu Yang
- Department of Chemical and Life Science Engineering
- Virginia Commonwealth University
- Richmond
- USA
- Department of Pharmaceutics
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15
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Liu Z, Liao J, He L, Gui Q, Yuan Y, Zhang H. Preparation, photo-induced deformation behavior and application of hydrogen-bonded crosslinked liquid crystalline elastomers based on α-cyanostilbene. Polym Chem 2020. [DOI: 10.1039/d0py01060j] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of high-performance α-cyanostilbene-based photoresponsive LCEs were prepared, and their application in information encryption materials was also explored.
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Affiliation(s)
- Zui Liu
- Key Laboratory of Polymeric Materials and Application Technology of Hunan Province
- Key Laboratory of Advanced Functional Polymer Materials of Colleges and Universities of Hunan Province
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| | - Junqiu Liao
- Key Laboratory of Polymeric Materials and Application Technology of Hunan Province
- Key Laboratory of Advanced Functional Polymer Materials of Colleges and Universities of Hunan Province
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| | - Lifang He
- Key Laboratory of Polymeric Materials and Application Technology of Hunan Province
- Key Laboratory of Advanced Functional Polymer Materials of Colleges and Universities of Hunan Province
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| | - Qin Gui
- Key Laboratory of Polymeric Materials and Application Technology of Hunan Province
- Key Laboratory of Advanced Functional Polymer Materials of Colleges and Universities of Hunan Province
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| | - Yongjie Yuan
- Key Laboratory of Polymeric Materials and Application Technology of Hunan Province
- Key Laboratory of Advanced Functional Polymer Materials of Colleges and Universities of Hunan Province
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| | - Hailiang Zhang
- Key Laboratory of Polymeric Materials and Application Technology of Hunan Province
- Key Laboratory of Advanced Functional Polymer Materials of Colleges and Universities of Hunan Province
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
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Gui Q, Hoffman PS, Lewis JP. Amixicile targets anaerobic bacteria within the oral microbiome. J Oral Biosci 2019; 61:226-235. [PMID: 31706024 PMCID: PMC7550198 DOI: 10.1016/j.job.2019.10.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 10/13/2019] [Accepted: 10/21/2019] [Indexed: 10/25/2022]
Abstract
OBJECTIVES Anaerobic bacteria are the major causative agents of periodontal disease. However, so far, targeted therapy aimed at reducing those pathogens has not been widely implemented. We have previously reported on a novel antimicrobial, amixicile, that targets anaerobic bacteria through inhibition of the function of the major anaerobic metabolic enzyme pyruvate ferredoxin oxidoreductase (PFOR), while not affecting aerotolerant organisms. It effectively inhibited the growth of oral anaerobes both in monocultures as well as in mixed in vitro mixed cultured however, amixicile's activity in in vivo-like conditions remained to be established. METHODS Here, we expand our study using an ex vivo oral microbiome combined with metagenomic sequencing to determine the effect of amixicile treatment on the composition of the microbiome and compare it to that of metronidazole. RESULTS Our results show that in the complex microbiomes, anaerobic bacteria are selectively inhibited, while the growth of aerotolerant ones, such as Streptococcus, Klebsiella, Neisseria, and Rothia is unaffected. Veillonella was the most abundant anaerobic genus in our ex vivo microbiome, and we observed complete inhibition of its growth. In addition, growth of other anaerobes, Fusobacterium and Prevotella, was significantly inhibited. It is noteworthy that a change in abundance of bacteriophages, such as Siphoviridae and Myoviridae, associated with the oral microbiome was observed. CONCLUSIONS Collectively, our data expand on the so far reported inhibitory spectrum of amixicile and demonstrates that it inhibits anaerobic bacteria, including both clinical isolates and laboratory strains.
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Affiliation(s)
- Qin Gui
- Philips Institute of Oral Health Research, Richmond, VA, USA
| | - Paul S Hoffman
- Department of Medicine, Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA
| | - Janina P Lewis
- Philips Institute of Oral Health Research, Richmond, VA, USA; Department of Microbiology and Immunology, Virginia Commonwealth University, Richmond, VA, USA; Department of Biochemistry, Virginia Commonwealth University, Richmond, VA, USA.
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Abstract
In this study, the anticancer drug, camptothecin (CPT), was covalently grafted onto polyamidoamine (PAMAM) dendrimer surface and then reacted with polyethylene glycol diacrylate (PEG-DA) to form dendrimer hydrogel (DH-G3-CPT) with low cross-linking density. In this novel drug delivery system, CPT was cleaved from dendrimer via the ammonolysis of ester bonds and then diffused out of the hydrogel network, thus leading to significantly prolonged drug release. The self-cleaving release kinetics of camptothecin can be further tuned by pH. This DH-G3-CPT drug delivery system has both injectability and sustained drug release. It showed an excellent tumor inhibition effect following intratumoral injection in a head and neck cancer model of mouse.
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Affiliation(s)
- Juan Wang
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, Virginia 23219, United States
| | - Hongliang He
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, Virginia 23219, United States
| | - Remy C Cooper
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Qin Gui
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, Virginia 23219, United States
| | - Hu Yang
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, Virginia 23219, United States
- Department of Pharmaceutics, Virginia Commonwealth University, Richmond, Virginia 23298, United States
- Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia 23298, United States
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Hutcherson JA, Sinclair KM, Belvin BR, Gui Q, Hoffman PS, Lewis JP. Amixicile, a novel strategy for targeting oral anaerobic pathogens. Sci Rep 2017; 7:10474. [PMID: 28874750 PMCID: PMC5585216 DOI: 10.1038/s41598-017-09616-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 07/24/2017] [Indexed: 01/27/2023] Open
Abstract
The oral microflora is composed of both health-promoting as well as disease-initiating bacteria. Many of the disease-initiating bacteria are anaerobic and include organisms such as Porphyromonas gingivalis, Prevotella intermedia, Fusobacterium nucleatum, and Tannerella forsythia. Here we investigated a novel therapeutic, amixicile, that targets pyruvate:ferredoxin oxidoreductase (PFOR), a major metabolic enzyme involved in energy generation through oxidative decarboxylation of pyruvate. PFOR is present in these anaerobic pathogenic bacteria and thus we hypothesized that amixicile would effectively inhibit their growth. In general, PFOR is present in all obligate anaerobic bacteria, while oral commensal aerobes, including aerotolerant ones, such as Streptococcus gordonii, use pyruvate dehydrogenase to decarboxylate pyruvate. Accordingly, we observed that growth of the PFOR-containing anaerobic periodontal pathogens, grown in both monospecies as well as multispecies broth cultures was inhibited in a dose-dependent manner while that of S. gordonii was unaffected. Furthermore, we also show that amixicile is effective against these pathogens grown as monospecies and multispecies biofilms. Finally, amixicile is the first selective therapeutic agent active against bacteria internalized by host cells. Together, the results show that amixicile is an effective inhibitor of oral anaerobic bacteria and as such, is a good candidate for treatment of periodontal diseases.
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Affiliation(s)
- Justin A Hutcherson
- Philips Institute of Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Kathryn M Sinclair
- Philips Institute of Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, USA
- Department of Microbiology and Immunology, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Benjamin R Belvin
- Philips Institute of Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, USA
- Department of Biochemistry, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Qin Gui
- Philips Institute of Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Paul S Hoffman
- Department of Medicine, Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, Virginia, USA
| | - Janina P Lewis
- Philips Institute of Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, USA.
- Department of Microbiology and Immunology, Virginia Commonwealth University, Richmond, Virginia, USA.
- Department of Biochemistry, Virginia Commonwealth University, Richmond, Virginia, USA.
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Ma XT, Sun XY, Yu K, Gui BS, Gui Q, Ouyang JM. Effect of Content of Sulfate Groups in Seaweed Polysaccharides on Antioxidant Activity and Repair Effect of Subcellular Organelles in Injured HK-2 Cells. Oxid Med Cell Longev 2017; 2017:2542950. [PMID: 28785372 PMCID: PMC5529655 DOI: 10.1155/2017/2542950] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 04/30/2017] [Indexed: 12/24/2022]
Abstract
This study aims to investigate the repair effect of subcellular structure injuries of the HK-2 cells of four degraded seaweed polysaccharides (DSPs), namely, the degraded Porphyra yezoensis, Gracilaria lemaneiformis, Sargassum fusiform, and Undaria pinnatifida polysaccharides. The four DSPs have similar molecular weight, but with different content of sulfate groups (i.e., 17.9%, 13.3%, 8.2%, and 5.5%, resp.). The damaged model was established using 2.8 mmol/L oxalate to injure HK-2 cells, and 60 μg/mL of various DSPs was used to repair the damaged cells. With the increase of sulfate group content in DSPs, the scavenging activity of radicals and their reducing power were all improved. Four kinds of DSPs have repair effect on the subcellular organelles of damaged HK-2 cells. After being repaired by DSPs, the release amount of lactate dehydrogenase was decreased, the integrity of cell membrane and lysosome increased, the Δψm increased, the cell of G1 phase arrest was inhibited, the proportion of S phase increased, and cell apoptotic and necrosis rates were significantly reduced. The greater the content of sulfate group is, the stronger is the repair ability of the polysaccharide. These DSPs, particularly the polysaccharide with higher sulfate group content, may be a potential drug for the prevention and cure of kidney stones.
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Affiliation(s)
- Xiao-Tao Ma
- Department of Nephrology, The Second Hospital of Xi'an Jiaotong University, Xi'an 710004, China
| | - Xin-Yuan Sun
- Institute of Biomineralization and Lithiasis Research, Jinan University, Guangzhou 510632, China
| | - Kai Yu
- Institute of Biomineralization and Lithiasis Research, Jinan University, Guangzhou 510632, China
| | - Bao-Song Gui
- Department of Nephrology, The Second Hospital of Xi'an Jiaotong University, Xi'an 710004, China
| | - Qin Gui
- Institute of Biomineralization and Lithiasis Research, Jinan University, Guangzhou 510632, China
| | - Jian-Ming Ouyang
- Institute of Biomineralization and Lithiasis Research, Jinan University, Guangzhou 510632, China
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Huang LS, Sun XY, Gui Q, Ouyang JM. Effects of plant polysaccharides with different carboxyl group contents on calcium oxalate crystal growth. CrystEngComm 2017. [DOI: 10.1039/c7ce00983f] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effects of five plant polysaccharides (PPSs) with molecular weights of ∼4000 Da and different carboxylic group (–COOH) contents on the crystal growth of calcium oxalate (CaOx) were comparatively studied.
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Affiliation(s)
- Li-Shan Huang
- Institute of Biomineralization and Lithiasis Research
- Jinan University
- Guangzhou 510632
- China
| | - Xin-Yuan Sun
- Institute of Biomineralization and Lithiasis Research
- Jinan University
- Guangzhou 510632
- China
| | - Qin Gui
- Institute of Biomineralization and Lithiasis Research
- Jinan University
- Guangzhou 510632
- China
| | - Jian-Ming Ouyang
- Institute of Biomineralization and Lithiasis Research
- Jinan University
- Guangzhou 510632
- China
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Sun XY, Ouyang JM, Bhadja P, Gui Q, Peng H, Liu J. Protective Effects of Degraded Soybean Polysaccharides on Renal Epithelial Cells Exposed to Oxidative Damage. J Agric Food Chem 2016; 64:7911-7920. [PMID: 27701856 DOI: 10.1021/acs.jafc.6b03323] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This study aimed to investigate the protective effects of degraded soybean polysaccharides (DSP) on oxidatively damaged African green monkey kidney epithelial (Vero) cells. Low DSP concentration (10 μg/mL) elicited an evident protective effect on H2O2-induced cell injury (0.3 mmol/L). The cell viabilities of the H2O2-treated group and the DSP-protected group were 57.3 and 93.1%, respectively. The cell viability decreased to 88.3% when the dosage was increased to 100 μg/mL. DSP protected Vero cells from H2O2-mediated oxidative damage by enhancing cellular superoxide dismutase activity and total antioxidant capacity and by decreasing malonaldehyde content and lactate dehydrogenase release. The H2O2-treated cells stimulated the aggregation of calcium oxalate monohydrate crystals. DSP could also reduce the crystal size, decrease the attached crystal content, and prevent the cell aggregation by alleviating oxidative injury and lipid peroxidation, enhancing antioxidant capacity, and decreasing hyaluronan expression on cellular surfaces. The internalization ability of the injured cells was improved after these cells were exposed to DSP solution. The regulation ability of DSP-repaired cells on calcium oxalate dihydrate formation, crystal attachment, aggregation, and internalization was lower than that of normal cells but was higher than that of the injured cells. DSP may be a potential green drug to prevent calcium oxalate (CaOx) stone formation because DSP could protect cells from oxidative damage and inhibit CaOx crystal formation.
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Affiliation(s)
- Xin-Yuan Sun
- Department of Chemistry and ‡Institute of Biomineralization and Lithiasis Research, Jinan University , Guangzhou 510632, China
| | - Jian-Ming Ouyang
- Department of Chemistry and ‡Institute of Biomineralization and Lithiasis Research, Jinan University , Guangzhou 510632, China
| | - Poonam Bhadja
- Department of Chemistry and ‡Institute of Biomineralization and Lithiasis Research, Jinan University , Guangzhou 510632, China
| | - Qin Gui
- Department of Chemistry and ‡Institute of Biomineralization and Lithiasis Research, Jinan University , Guangzhou 510632, China
| | - Hua Peng
- Department of Chemistry and ‡Institute of Biomineralization and Lithiasis Research, Jinan University , Guangzhou 510632, China
| | - Jie Liu
- Department of Chemistry and ‡Institute of Biomineralization and Lithiasis Research, Jinan University , Guangzhou 510632, China
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Liu TY, Li J, Wen XH, Zhang H, Gui Q. The efficacy of open nephron-sparing surgery in the treatment of complex renal cell carcinoma. Eur Rev Med Pharmacol Sci 2016; 20:3959-3964. [PMID: 27775806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
OBJECTIVE To analyze the efficacy of open nephron-sparing surgery (NSS) in the treatment of complex renal cell carcinoma. PATIENTS AND METHODS A total of 118 patients with complex renal cell carcinoma (T1N0M0, clear cell carcinoma) were included in this study, and assigned into open radical nephrectomy (RN) group (35 patients), open NSS group (45 patients) and laparoscopic NSS group (38 patients). After 3 years of follow-up, the clinical efficacy was analyzed. RESULTS Both the mean surgery time and ischemia blocking time in the open NSS group were comparable to those in the RN group, and significantly shorter than the laparoscopic NSS group, p < 0.05. The rate of positive margin in the open NSS group was significantly lower than the laparoscopic NSS group. The occurrence of total complications in the open NSS group was comparable to that in the laparoscopic NSS group and significantly lower than the RN group. The successful rate of surgery in the open NSS group was significantly higher than the laparoscopic NSS group, p < 0.05. The 75% survival was 30.0 months in the RN group, > 35.0 months in the open NSS group and 34.0 months in the laparoscopic NSS group, the difference was significant (p < 0.001). The mortality was similar in the open NSS group and the laparoscopic NSS group, and significantly smaller than the RN group, p < 0.05. CONCLUSIONS Open NSS was more safe and effective in the treatment of complex renal cell carcinoma than RN and laparoscopic NSS.
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Affiliation(s)
- T-Y Liu
- Department of Urology, Zhumadian Central Hospital, Zhumadian, Henan, China.
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Guo X, Yang M, Jiang J, Li H, Zhu C, Gui Q, Bu L, Zhou H. [Molecular characteristics of dengue virus outbreak in China-Myanmar border region, Yunnan province, 2015]. Zhonghua Liu Xing Bing Xue Za Zhi 2016; 37:398-401. [PMID: 27005545 DOI: 10.3760/cma.j.issn.0254-6450.2016.03.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To understand the molecular characteristics of a dengue virus outbreak in China-Myanmar border region, Yunnan province, 2015 and provide etiological evidence for the disease control and prevention. METHODS Semi-nested RTPCR was conducted to detect the capsid premembrane (CprM) gene of RNA of dengue virus by using dengue virus NS1 positive serum samples collected in Mengdin township, Gengma county, Yunnan province in July, 2015. Some positive samples were then detected by using PCR with specific primers to amplify the full E gene. The positive PCR products were directly sequenced. Then sequences generated in this study were BLAST in NCBI website and aligned in Megalign in DNAstar program. Multiple sequence alignments were carried out by using Mega 5.05 software based on the sequences generated in this study and sequences downloaded from GenBank, including the representative strains from different countries and regions. Phylogenetic trees were constructed by using Neighbor-Joining tree methods with Mega 5.05 software. RESULTS Twenty one of 25 local cases and 10 of 14 imported cases from Myanmar were positive for DENV-1. Eight serum samples were negative for dengue virus. A total of 13 strains with E gene (1485 bp), including 8 local strains and 5 imported strains, were sequenced, which shared 100% nucleotide sequence identities. Twelve strains with CprM gene (406 bp) from 9 local cases and 3 imported cases shared 100% nucleotide sequence identities. Phylogenetic analyses based on E gene showed that the new 13 strains clustered in genotype I of dengue virus and formed a distinct lineage. CONCLUSIONS This outbreak was caused by genotype I of DENV-1, which had the closest phylogenetic relationships with dengue virus from neighboring Burma area. Comprehensive measures of prevention and control of dengue fever should be strengthened to prevent the spread of dengue virus.
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Affiliation(s)
- Xiaofang Guo
- Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research and Yunnan Provincial Center of Arborvirus Research of Yunnan Institute of Parasitic Diseases, Pu'er 665000, China
| | - Mingdong Yang
- Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research and Yunnan Provincial Center of Arborvirus Research of Yunnan Institute of Parasitic Diseases, Pu'er 665000, China
| | - Jinyong Jiang
- Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research and Yunnan Provincial Center of Arborvirus Research of Yunnan Institute of Parasitic Diseases, Pu'er 665000, China
| | - Huachang Li
- Lincang County Center for Disease Control and Prevention, Lincang 677000, China
| | - Chongge Zhu
- Gengma County Center for Disease Control and Prevention, Gengma 677500, China
| | - Qin Gui
- Gengma County Center for Disease Control and Prevention, Gengma 677500, China
| | - Liqun Bu
- Gengma County Center for Disease Control and Prevention, Gengma 677500, China
| | - Hongning Zhou
- Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research and Yunnan Provincial Center of Arborvirus Research of Yunnan Institute of Parasitic Diseases, Pu'er 665000, China
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Bhoopathi P, Quinn BA, Gui Q, Shen XN, Grossman SR, Das SK, Sarkar D, Fisher PB, Emdad L. Pancreatic cancer-specific cell death induced in vivo by cytoplasmic-delivered polyinosine-polycytidylic acid. Cancer Res 2014; 74:6224-35. [PMID: 25205107 DOI: 10.1158/0008-5472.can-14-0819] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Polyinosine-polycytidylic acid [pIC] is a synthetic dsRNA that acts as an immune agonist of TLR3 and RLR to activate dendritic and natural killer cells that can kill tumor cells. pIC can also trigger apoptosis in pancreatic ductal adenocarcinoma cells (PDAC) but its mechanism of action is obscure. In this study, we investigated the potential therapeutic activity of a formulation of pIC with polyethylenimine ([pIC](PEI)) in PDAC and investigated its mechanism of action. [pIC](PEI) stimulated apoptosis in PDAC cells without affecting normal pancreatic epithelial cells. Mechanistically, [pIC](PEI) repressed XIAP and survivin expression and activated an immune response by inducing MDA-5, RIG-I, and NOXA. Phosphorylation of AKT was inhibited by [pIC](PEI) in PDAC, and this event was critical for stimulating apoptosis through XIAP and survivin degradation. In vivo administration of [pIC](PEI) inhibited tumor growth via AKT-mediated XIAP degradation in both subcutaneous and quasi-orthotopic models of PDAC. Taken together, these results offer a preclinical proof-of-concept for the evaluation of [pIC](PEI) as an immunochemotherapy to treat pancreatic cancer.
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Affiliation(s)
- Praveen Bhoopathi
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, Virginia
| | - Bridget A Quinn
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, Virginia
| | - Qin Gui
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, Virginia
| | - Xue-Ning Shen
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, Virginia
| | - Steven R Grossman
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, Virginia. Department of Internal Medicine, Virginia Commonwealth University, School of Medicine, Richmond, Virginia. VCU Massey Cancer Center, Virginia Commonwealth University, School of Medicine, Richmond, Virginia
| | - Swadesh K Das
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, Virginia. VCU Institute of Molecular Medicine, Virginia Commonwealth University, School of Medicine, Richmond, Virginia
| | - Devanand Sarkar
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, Virginia. VCU Massey Cancer Center, Virginia Commonwealth University, School of Medicine, Richmond, Virginia. VCU Institute of Molecular Medicine, Virginia Commonwealth University, School of Medicine, Richmond, Virginia
| | - Paul B Fisher
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, Virginia. VCU Massey Cancer Center, Virginia Commonwealth University, School of Medicine, Richmond, Virginia. VCU Institute of Molecular Medicine, Virginia Commonwealth University, School of Medicine, Richmond, Virginia.
| | - Luni Emdad
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, Virginia. VCU Massey Cancer Center, Virginia Commonwealth University, School of Medicine, Richmond, Virginia. VCU Institute of Molecular Medicine, Virginia Commonwealth University, School of Medicine, Richmond, Virginia.
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Wang Y, Zhu YD, Gui Q, Wang XD, Zhu YX. Glucagon-induced angiogenesis and tumor growth through the HIF-1-VEGF-dependent pathway in hyperglycemic nude mice. Genet Mol Res 2014; 13:7173-83. [PMID: 25222223 DOI: 10.4238/2014.september.5.3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
In this study, we examined the effect glucagon-induced hyperglycemia on tumor growth as well as the role of the hypoxia-inducible factor 1 (HIF-1)-vascular endothelial growth factor (VEGF) pathway in this condition. A high concentration of glucose (HG) was utilized to treat HeLa cells under hypoxic or normoxic conditions, and transcriptional levels of HIF-1, VEGF, and basic fibroblast growth factor (bFGF) were evaluated. Moreover, the ability of an HIF-1 inhibitor to block the effect induced by HG was examined. By contrast, hyperglycemia was induced in nude mice by glucagon released from an osmotic pump, and microvessel density was determined with CD31 staining. Thus, the relationship among hyperglycemia, microvessel density, tumor growth, and the HIF-1 inhibitor were analyzed. We found that HG increased transcription of the VEGF gene, which is downstream of HIF-1. Moreover, HG impaired the function of HIF-1 inhibitors [HIF-1 small interfering RNA (siRNA) and berberine] to affect the VEGF transcription level in tumor cells. By contrast, hyperglycemia increased tumor microvessel density and promoted tumor growth, which was inhibited by the HIF-1 inhibitor. However, hyperglycemia attenuated the effect of the HIF-1 inhibitor. Glucagon-induced hyperglycemia influenced tumor microenvironments through the HIF-1-VEGF-dependent pathway and promoted tumor growth and resistance to HIF-1 inhibition treatments.
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Affiliation(s)
- Y Wang
- Pediatric Department, Southwest Hospital of The Third Military Medical University, Chongqing, China
| | - Y D Zhu
- Department of Pharmacy, Children's Hospital of Chongqing Medical University, Chongqing, China
| | - Q Gui
- Pediatric Department, Southwest Hospital of The Third Military Medical University, Chongqing, China
| | - X D Wang
- Department of Clinical Laboratory, The Fifth People's Hospital of Wuxi, The Affiliated Hospital of Nanjing Medical University, Wuxi, Jiangsu, China
| | - Y X Zhu
- Department of Oncology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
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26
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Chen JP, Zhao WL, He NH, Gui Q, Xiong JP, Zhou HM, Wang Y, Chen S, Zhou P. Association of Hepatitis A exposure and TIM-1 with childhood allergic asthma. J Asthma 2012; 49:697-702. [PMID: 22857392 DOI: 10.3109/02770903.2012.694539] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND Hepatitis A virus (HAV) receptor (TIM-1) polymorphism plays an important role in asthma and autoimmune diseases. Objective. To analyze the association of TIM-1 polymorphism and HAV infection with childhood allergic asthma in Southwest China. METHODS TIM-1 exon 4 (157insMTTTVP) and two polymorphism loci, -416G>C and -1454G>A, in the HAV receptor promoter region were studied. Polymerase chain reaction (PCR) was used to test the genotypes of three polymorphism loci among 579 cases of asthma and 524 controls. The HAV infection status was determined in a case-control study with stratified analysis. RESULTS HAV exposure associated with childhood allergic asthma in the study population was compared with controls (odds ratio (OR) = 0.181, 95% confidence interval (CI) 0.126-0.260, p < .001). The -416G>C polymorphism was associated with asthma (OR = 1.384, 95% CI 1.148-1.669, p < .001), but the insertion variant 157delMTTTVP of exon 4 and the -1454G>A polymorphism were not. CONCLUSION Our results indicated that the -416G>C polymorphism of the TIM-1 gene is associated with childhood allergic asthma, providing a better understanding of the pathogenesis of the allergic asthma among children aged below 15 years in Southwest China.
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Affiliation(s)
- Jian-Ping Chen
- Department of Pediatrics, Southwest Hospital, The Third Military Medical University, Chongqing 400038, China
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Gui Q, Wang J, Xu Y, Wang J. [Expression changes of duplicated genes in allotetraploids of brassica detected by SRAP-cDNA technique]. Mol Biol (Mosk) 2009; 43:3-9. [PMID: 19334520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Polyploidization plays an important role in plant evolution, and it may trigger changes in genome structure and gene expression. The purpose of this study was to detect the extent of gene expression alterations in natural Brassica allotetraploids. Sequence-related amplified polymorphism (SRAP)-cDNA display was carried out on six species (13 accessions), three allotetraploids and their three ancestral diploids. Total of 1496 transcripts were screened, finding that 92 (6.1%) transcripts were subjected to silencing in allopolyploids, while 19 (1.3%) transcripts were activated. The results indicated that a significant fraction of duplicated genes have shown expression alterations in the natural allotetraploids compared with their diploid parents.
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Zhou G, He W, Chen D, Gui Q. [Application of T1-weighted images by contrast-enhanced frequency-selective presaturation in magnetic resonance imaging]. Hunan Yi Ke Da Xue Xue Bao 1998; 22:265-7. [PMID: 9868132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
In this study contrast-enhanced frequency-selective presaturation T1-weighted images and contrast-enhanced spin echo T1-weighted images in 32 cases were detected and analysed comparatively regarding enhancing lesions and the signal intensity of enhancing lesions. The results showed that in the signal intensity of enhancing lesion, the contrast enhanced frequency-selective presaturation T1-weighted images showing high sign were greater than contrast-enhanced spin echo T1-weighted images. The former was better than the later in accurate evaluation of the margin, size and the differential diagnosis of enhancing lesion, especially in the regions containing more fat and bone marrow.
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Affiliation(s)
- G Zhou
- Department of Radiology, Xiangya Hospital, Hunan Medical University, Changsha
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31
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Lu X, Chen J, Wang L, Liang Y, Gui Q. Correlative studies of MR findings with neuropathology in Shy-Drager syndrome and striatonigral degeneration. Chin Med J (Engl) 1997; 110:628-31. [PMID: 9594269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVE To determine the pathologic bases of the abnormal signal intensities detected on magnetic resonance imaging (MRI) in Shy-Drager syndrome (SDS) and striatonigral degeneration (SND). METHODS The correlation of MRI and pathological findings was prospectively evaluated by postmortem scanning of the brain in a case of SDS and another of SND. MRI was performed by using a 1.0 T superconductive magnetic unit, with spin echo (SE) pulse sequences. The brain sections were prepared parallel to the MRI planes. The gross and microscopic pathological studies were conducted according to the corresponding abnormal signal intensities on MRI. RESULTS In SDS, abnormal hypointense signals on T2 weighted MR images were symmetrically demonstrated in bilateral putamen, where a remarkable positive Prussian blue stain reaction was revealed on pathological examinations. In SND, MRI showed isointense signals on T1 weighted images and hyperintense signals on T2 weighted images in bilateral putamen, and the microscopic findings included necrosis, abundant reactive fibrillary astrocytes and prominence of capillary vascular networks, as well as marked lipofuscin. The number of neurons decreased in both cases. CONCLUSIONS The demonstration of the abnormal signals in the putamen on MRI is of important value in establishing an antemortem diagnosis of SDS and SND.
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Affiliation(s)
- X Lu
- Department of MRI, Air Force General Hospital of PLA, Beijing, China
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