1
|
Wan F, Chen ZW, Xu TT, Guan JJ, Cui XM, Kang CZ, Zhou T, Wang CX, Guo LP, Yang Y. Selection and application of aptamers for p-hydroxybenzyl hydrogen sulfite after Gastrodia elata Bl. fumigated with sulfur. Talanta 2024; 269:125461. [PMID: 38056416 DOI: 10.1016/j.talanta.2023.125461] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 10/01/2023] [Accepted: 11/20/2023] [Indexed: 12/08/2023]
Abstract
Gastrodia elata Bl. is a widely used traditional Chinese medicine known for its medicinal properties. However, during the drying process, G. elata is often fumigated with sulfur to prevent corrosion and improve its appearance. Sulfur-fumigation can result in a reduction in the effective components of the herb and can also be hazardous to human health due to the remaining sulfur dioxide. Sulfur-fumigation of G. elata poses a significant challenge to both end-users and researchers. The detection of p-hydroxybenzyl hydrogen sulfite (p-HS) is a useful tool in determining whether G. elata has been fumigated with sulfur. Unfortunately, the current method for detecting p-HS is costly and requires sophisticated instruments. Therefore, there is a need to develop a more cost-effective and user-friendly method for the detection of p-HS. This study utilized the Capture-SELEX technique to screen high-affinity aptamers for p-HS, which were subsequently characterized by isothermal titration calorimetry (ITC). An aptamer sequence (seq 6) with a high affinity of Kd = 26.5 μM was obtained following 8 rounds of selection against p-HS. With the aptamer serving as the recognition element and gold nanoparticles as the colorimetric indicator, a simple and efficient colorimetric sensor was developed for the specific detection of p-HS. This detection method exhibited a limit of detection of 1 μg/ml, while the p-HS recoveries demonstrated a range of between 88.5 % and 105 % for samples of G. elata obtained in the market. In summary, the aptamer exhibited a high affinity for p-HS, and the sensor developed through the use of a colloidal gold detector based on nucleic acid aptamer can be utilized for rapid detection of sulfur-fumigated G. elata. With these findings, this research paper provides valuable scientific insights and highlights significant potential for future studies in this area.
Collapse
Affiliation(s)
- Fen Wan
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China
| | - Zhuo-Wen Chen
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China
| | - Ting-Ting Xu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China
| | - Jin-Jie Guan
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China
| | - Xiu-Ming Cui
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China; Yunnan Provincial Key Laboratory of Panax Notoginseng, Kunming, 650500, China
| | - Chuan-Zhi Kang
- China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Tao Zhou
- Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
| | - Cheng-Xiao Wang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China; Yunnan Provincial Key Laboratory of Panax Notoginseng, Kunming, 650500, China
| | - Lan-Ping Guo
- China Academy of Chinese Medical Sciences, Beijing, 100700, China.
| | - Ye Yang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China; Yunnan Provincial Key Laboratory of Panax Notoginseng, Kunming, 650500, China.
| |
Collapse
|
2
|
Kwon J, Rochester J, Wan F, Rindfleisch MA, Tomsic MJ, Sumption MD, Collings EW. CRITICAL CURRENT DENSITIES AND N-VALUES OF MGB 2 CONDUCTORS FOR SMES, MRI, AND LOW AC LOSS APPLICATIONS. IEEE Trans Appl Supercond 2023; 33:6200204. [PMID: 37997585 PMCID: PMC10665032 DOI: 10.1109/tasc.2023.3247375] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
Multifilamentary MgB 2 strands (filament numbers 36 to 114) prepared by the in-situ power-in-tube (PIT) route with carbon doping contents of 0, 2, and 3.2% were wound on barrels for transport J c and n -value measurement at 4.2 K in fields of up to 12 T. The strand and gauge lengths were 1 m and 0.5 m. Heat treatments at 675 °C and 650 °C centered around the melting point of Mg (650 °C) and both utilized the liquid-solid reaction. A pair of strands, with and without 2% C doping exhibited the J c (B) crossover effect. Studied were the dependencies of J c on field strength, dopant concentration, and cabling and the dependence of n -value on field strength.
Collapse
Affiliation(s)
- J Kwon
- Center for Superconducting and Magnetic Materials, The Ohio State University, Columbus, OH 43210
| | - J Rochester
- Center for Superconducting and Magnetic Materials, The Ohio State University, Columbus, OH 43210
| | - F Wan
- Center for Superconducting and Magnetic Materials, The Ohio State University, Columbus, OH 43210
- Now employed at Fermilab, Batavia, IL 60510
| | | | | | - M D Sumption
- Center for Superconducting and Magnetic Materials, The Ohio State University, Columbus, OH 43210
| | - E W Collings
- Center for Superconducting and Magnetic Materials, The Ohio State University, Columbus, OH 43210
| |
Collapse
|
3
|
Chen J, Li G, Wan F, Liu P, Du F, Shao Y, Zhang Q, Cheng Z, Liu Y. Virulence Characteristics and Drug Resistance of the Prevalent Capsule Types in Acinetobacter baumannii. Microb Drug Resist 2023. [PMID: 37074067 DOI: 10.1089/mdr.2022.0310] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2023] Open
Abstract
Acinetobacter baumannii is a highly antibiotic-resistant pathogen causing nosocomial severe life-threatening infections, especially in critically ill patients. Capsular polysaccharide is a major virulence factor of A. baumannii both in vitro and in vivo. In this study, 220 isolates were collected in the hospital. The prevalent capsular types of A. baumannii were determined using polymerase chain reaction, and the clinical characteristics of infections were analyzed. The virulence of these strains was determined by serum-killing resistance, biofilm formation, and Galleria mellonella survival assays. Twenty-eight isolates (12.7%) carried KL2, and 22 isolates (10%) carried the types KL10, KL14, KL22, and KL52. Compared with non-KL2 (KL10, KL14, KL22, and KL52) isolates, KL2 isolates had significantly higher resistance to all antimicrobials except tigecycline, cefoperazone-sulbactam, or colistin. Seventy-five percent of KL2 A. baumannii and 72.7% of non-KL2 were highly virulent using a G. mellonella model. Biofilm formation was significantly different between the KL2 and non-KL2 groups. The biofilm production of non-KL2 A. baumannii was significantly stronger than that of KL2 A. baumannii. These findings highlight the role of KL2 as a powerful factor for drug resistance and virulence of A. baumannii.
Collapse
Affiliation(s)
- Jiao Chen
- School of Laboratory Medicine, Nan Chang Medical College, Nanchang, China
- Jiang Xi Health Vocational College, Nanchang, China
| | - Guanghui Li
- School of Information Engineering, East China Jiao Tong University, Nanchang, China
| | - Fen Wan
- School of Laboratory Medicine, Nan Chang Medical College, Nanchang, China
| | - Peng Liu
- Department of Clinical Microbiology, The First Affiliated hospital of Nan Chang University, Nanchang, China
| | - Fangling Du
- Department of Clinical Microbiology, The First Affiliated hospital of Nan Chang University, Nanchang, China
| | - Yanting Shao
- School of Laboratory Medicine, Nan Chang Medical College, Nanchang, China
| | - Qi Zhang
- School of Laboratory Medicine, Nan Chang Medical College, Nanchang, China
| | - Zhibin Cheng
- School of Laboratory Medicine, Nan Chang Medical College, Nanchang, China
| | - Yang Liu
- Department of Clinical Microbiology, The First Affiliated hospital of Nan Chang University, Nanchang, China
| |
Collapse
|
4
|
Bonura E, Mehegan M, Wan F, Hahn LRG, Mokshagundam D, Scheel J, Ybarra A, Gazit A, Miller J, Nath D, Eghtesady P, Canter C. Ventricular Assist Device (VAD) Support Leads to Different Outcomes in Infants with Single Ventricle (SVAD) vs Two Ventricle (2VAD) Anatomy with Severe Heart Failure. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
|
5
|
Wan F, Sumption MD, Collings EW. Mechanism of enhanced critical fields and critical current densities of MgB 2 wires with C/Dy 2O 3 co-additions. J Appl Phys 2023; 133:023905. [PMID: 36643867 PMCID: PMC9836725 DOI: 10.1063/5.0130589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
A series of monofilamentary powder-in-tube MgB2 wires were fabricated with 2 mol. % C doping and co-additions of 0-3 wt. % Dy2O3. Irreversibility fields (μ 0 Hirr ), upper critical fields (μ 0 Hc 2), and transport critical currents were measured, and from these quantities, anisotropies ( γ ) and electronic diffusivities ( D π , σ ) were estimated. The addition of 1 wt. % Dy2O3 to already optimally C-doped MgB2 wires produced higher Hc 2//ab , Hc 2//c , and Hirr values at 4.2 K. In addition, the critical current density, Jc , increased with Dy2O3 concentration up to 1 wt. % where non-barrier Jc reached 4.35 × 104 A/cm2 at 4.2 K, 10 T. At higher temperatures, for example, 20 K and 5 T, co-additions of 2 mol. % C and 2 wt. % Dy2O3 improved non-barrier Jc by 40% and 93% compared to 2 and 3 mol. % C doping, respectively. On the other hand, measurements of Tc showed that C/Dy2O3 co-additions increase interband scattering rates at a lower rate than C doping does (assuming C doping levels giving similar levels of low-T μ 0 Hc 2 increase as co-addition). Comparisons to a two-band model for μ 0 Hc 2 in MgB2 allowed us to conclude that the increases in Hc 2//ab , Hc 2//c , and Hirr (as well as concomitant increases in high-field Jc ) with Dy2O3 addition are consistent with increases primarily in intraband scattering. This suggests C/Dy2O3 co-addition to be a more promising candidate for improving non-barrier Jc of MgB2 at temperatures above 20 K.
Collapse
Affiliation(s)
- F. Wan
- Author to whom correspondence should be addressed:
| | - M. D. Sumption
- Center for Superconducting and Magnetic Materials, Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210, USA
| | - E. W. Collings
- Center for Superconducting and Magnetic Materials, Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210, USA
| |
Collapse
|
6
|
Guan J, Chen Z, Guo L, Cui X, Xu T, Wan F, Zhou T, Wang C, Yang Y. Evaluate how steaming and sulfur fumigation change the microstructure, physicochemical properties and in vitro digestibility of Gastrodia elata Bl. starch. Front Nutr 2023; 9:1087453. [PMID: 36687729 PMCID: PMC9849879 DOI: 10.3389/fnut.2022.1087453] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 12/09/2022] [Indexed: 01/07/2023] Open
Abstract
The sulfur dioxide gas (SO2) generated by sulfur burning can improve the appearance quality of food and enhance the storage time. However, excessive sulfur dioxide will pollute the environment and cause deterioration of food quality, and even the high residual levels can increase the risk of cancer. As Gastrodia elata Blume is prone to corruption during processing, sulfur fumigation is often used for preservation. In this study, spectral analysis and Texture Profile Analysis (TPA) were used to investigate the effects of traditional sulfur fumigation processing on the morphology quality, edible quality and structural characteristics of G. elata. The results showed that compared with direct drying, the pH decreased by 0.399 of the sulfur fumigated after steamed treatment G. elata, and the morphology quality, pasting ability and gel edible quality of the starch were significantly improved. In addition, it was suggested that sulfur fumigation after steaming could promote the release of molecular chains from starch granules and thus enhance the cross-linking between molecules, which explained the reason for the improve of starch edible quality. This study can provide technical and theoretical support for improving the quality of starch rich foods, replacing sulfur fumigation and reducing potential environmental hazards.
Collapse
Affiliation(s)
- Jinjie Guan
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan, China,Yunnan Provincial Key Laboratory of Panax Notoginseng, Kunming, China
| | - Zhuowen Chen
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan, China,Yunnan Provincial Key Laboratory of Panax Notoginseng, Kunming, China
| | - Lanping Guo
- China Academy of Chinese Medical Sciences, Beijing, China
| | - Xiuming Cui
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan, China,Yunnan Provincial Key Laboratory of Panax Notoginseng, Kunming, China
| | - Tingting Xu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan, China,Yunnan Provincial Key Laboratory of Panax Notoginseng, Kunming, China
| | - Fen Wan
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan, China,Yunnan Provincial Key Laboratory of Panax Notoginseng, Kunming, China
| | - Tao Zhou
- Resource Institute for Chinese and Ethnic Materia Medica, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Chengxiao Wang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan, China,Yunnan Provincial Key Laboratory of Panax Notoginseng, Kunming, China,Chengxiao Wang,
| | - Ye Yang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan, China,Yunnan Provincial Key Laboratory of Panax Notoginseng, Kunming, China,*Correspondence: Ye Yang,
| |
Collapse
|
7
|
Yang Y, Li D, Wan F, Chen B, Wu G, Li F, Ren Y, Liang P, Wan J, Songyang Z. Identification and Analysis of Small Molecule Inhibitors of CRISPR-Cas9 in Human Cells. Cells 2022; 11:3574. [PMID: 36429003 PMCID: PMC9688475 DOI: 10.3390/cells11223574] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 11/07/2022] [Accepted: 11/09/2022] [Indexed: 11/16/2022] Open
Abstract
Genome editing tools based on CRISPR-Cas systems can repair genetic mutations in situ; however, off-target effects and DNA damage lesions that result from genome editing remain major roadblocks to its full clinical implementation. Protein and chemical inhibitors of CRISPR-Cas systems may reduce off-target effects and DNA damage. Here we describe the identification of several lead chemical inhibitors that could specifically inhibit the activity of Streptococcus pyogenes Cas9 (SpCas9). In addition, we obtained derivatives of lead inhibitors that could penetrate the cell membrane and inhibit SpCas9 in cellulo. Two of these compounds, SP2 and SP24, were able to improve the specificity of SpCas9 in cellulo at low-micromolar concentration. Furthermore, microscale thermophoresis (MST) assays showed that SP24 might inhibit SpCas9 activity by interacting with both the SpCas9 protein and the SpCas9-gRNA ribonucleoprotein complex. Taken together, SP24 is a novel chemical inhibitor of SpCas9 which has the potential to enhance therapies that utilize SpCas9.
Collapse
Affiliation(s)
- Yue Yang
- MOE Key Laboratory of Gene Function and Regulation and Guangzhou Key Laboratory of Healthy Aging Research, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Donghua Li
- MOE Key Laboratory of Gene Function and Regulation and Guangzhou Key Laboratory of Healthy Aging Research, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Fen Wan
- International Cooperation Base of Pesticide and Green Synthesis (Hubei), Key Laboratory of Pesticide & Chemical Biology (CCNU), Ministry of Education, Department of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Bohong Chen
- MOE Key Laboratory of Gene Function and Regulation and Guangzhou Key Laboratory of Healthy Aging Research, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Guanglan Wu
- MOE Key Laboratory of Gene Function and Regulation and Guangzhou Key Laboratory of Healthy Aging Research, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Feng Li
- MOE Key Laboratory of Gene Function and Regulation and Guangzhou Key Laboratory of Healthy Aging Research, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Yanliang Ren
- International Cooperation Base of Pesticide and Green Synthesis (Hubei), Key Laboratory of Pesticide & Chemical Biology (CCNU), Ministry of Education, Department of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Puping Liang
- MOE Key Laboratory of Gene Function and Regulation and Guangzhou Key Laboratory of Healthy Aging Research, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
- Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| | - Jian Wan
- International Cooperation Base of Pesticide and Green Synthesis (Hubei), Key Laboratory of Pesticide & Chemical Biology (CCNU), Ministry of Education, Department of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Zhou Songyang
- MOE Key Laboratory of Gene Function and Regulation and Guangzhou Key Laboratory of Healthy Aging Research, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
- Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| |
Collapse
|
8
|
Xu L, Fan J, Fu H, Yang Y, Luo Q, Wan F. The variants of polymyxin susceptibility in different species of genus Aeromonas. Front Microbiol 2022; 13:1030564. [DOI: 10.3389/fmicb.2022.1030564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 10/07/2022] [Indexed: 11/13/2022] Open
Abstract
The aquatic environment is an important medium for the accumulation and dissemination of antibiotic-resistant bacteria as it is often closely related to human activities. Previous studies paid little attention to the prevalence and mechanism of polymyxin-resistant bacteria in the aquatic environment. As a Gram-negative opportunistic pathogen widely distributed in aquatic ecosystems, the antibiotic-resistant profile of Aeromonas spp. deserves much attention. In this study, we identified 61 Aeromonas spp. isolates from water samples in the section of the Yangtze River. The total polymyxin B (PMB) resistance rate of these strains was 49.18% (30/61), showing a high level of polymyxin resistance in Aeromonas spp. The MIC50 and MIC90 for PMB exhibited a significant discrepancy among different species (p < 0.001). The MIC50 and MIC90 for PMB in the Aeromonas hydrophila were 128 mg/L and above 128 mg/L while in Aeromonas caviae and Aeromonas veronii, the MIC50 and MIC90 value were both 2 mg/L. Only two A. veronii strains (MIC = 2 mg/L) and one A. caviae strain (MIC = 0.5 mg/L) were identified as carrying mobilized polymyxin resistant gene mcr-3.42, and mcr-3.16. All mcr genes were located in the chromosome. This is the first report that the downstream region of mcr-3.42 was the truncated mcr-3-like gene separated by the insertion sequences of ISAs20 (1,674 bp) and ISAs2 (1,084 bp). Analysis of epidemiology of mcr-positive Aeromonas genomes from GenBank database showed that the genus Aeromonas and the aquatic environment might be the potential container and reservoir of mcr-3. By the whole-genome sequencing and qRT-PCR, we inferred that the sequence differences in the AAA domain of MlaF protein and its expression level among these three species might be involved in the development of polymyxin resistance. Our study provided evidences of the possible mechanism for the variety of polymyxin susceptibility in different species of the genus Aeromonas and a theoretical basis for the surveillance of the aquatic environment.
Collapse
|
9
|
Dong ZC, Wang Y, Yang F, Wan F. A brief introduction to chemical proteomics for target deconvolution. Eur Rev Med Pharmacol Sci 2022; 26:6014-6026. [PMID: 36111901 DOI: 10.26355/eurrev_202209_29616] [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: 06/15/2023]
Abstract
OBJECTIVE Drug-target relationships provide the basis for network-based polypharmacology, and target deconvolution is a key step in phenotypic-screening based drug discovery. Due to the complexity of the mammalian proteomics and the often-limited affinity of the lead compound, it is challenging to identify the drug targets, especially when the goal is to identify all targets. This paper attempts to provide a brief and comprehensive introduction to the various methods in chemical proteomics for target deconvolution by categorizing them into two groups: the biochemical enrichment and the proteomics-screening methods. Moreover, a brief introduction of related Mass Spectrometry techniques is also provided, together with recent progress. MATERIALS AND METHODS The data for this review were queried from Web of Science and PubMed, the keywords used were Drug targets, Target deconvolution, and Chemical Proteomics. A total of over 500 relevant articles, with a time limit from 1953 to 2022, were identified according to search strategy. Duplicate records and review articles were excluded by their titles and abstracts. Finally, we found about 120 articles matching our inclusion criteria, which covered representative research and reviews of various target discovery methods. RESULTS Existing target discovery methods can be grouped into either biochemical enrichment or the proteomics-screening methods, with the recent emergence of a hybrid method combining these two such as lysine reactivity profiling. The advantage of the biochemical enrichment method is the ease of operation and the comprehensive target coverage. However, most biochemical enrichment methods require a high-affinity binding of the drug to the target proteins and cannot differentiate direct/indirect targets. The proteomics-screening methods do not require drug modification but have limited protein coverage, and most of them cannot differentiate direct/indirect targets. CONCLUSIONS Although existing target discovery methods have greatly facilitated pharmacological research, each of these methods has advantages and disadvantages. New strategies/methods are needed to further improve both the coverage of the proteosome and the specificity.
Collapse
Affiliation(s)
- Z-C Dong
- College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, China.
| | | | | | | |
Collapse
|
10
|
Majoros M, Sumption MD, Parizh M, Wan F, Rindfleisch MA, Doll D, Tomsic M, Collings EW. Magnetic, Mechanical and Thermal Modeling of Superconducting, Whole-body, Actively Shielded, 3 T MRI Magnets Wound Using MgB 2 Strands for Liquid Cryogen Free Operation. IEEE Trans Appl Supercond 2022; 32:4400104. [PMID: 36245846 PMCID: PMC9563318 DOI: 10.1109/tasc.2022.3147137] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
we present magnetic, mechanical and thermal modeling results for a 3 Tesla actively shielded whole body MRI (Magnetic Resonance Imaging) magnet consisting of coils with a square cross section of their windings. The magnet design was a segmented coil type optimized to minimize conductor length while hitting the standard field quality and DSV (Diameter of Spherical Volume) specifications as well as a standard, compact size 3 T system. It had an overall magnet length and conductor length which can lead to conduction cooled designs comparable to NbTi helium bath cooled 3 T MRI magnets. The design had a magnetic field homogeneity better than 10 ppm (part-per-million) within a DSV (Diameter of Spherical Volume) of 48 cm and the total magnet winding length of 1.37 m. A new class of MgB2 strand especially designed for MRI applications was considered as a possible candidate for winding such magnets. This work represents the first magnetic, mechanical and thermal design for a whole-body 3 T MgB2 short (1.37 m length) MRI magnet based on the performance parameters of existing MgB2 wire. 3 Tesla MRI magnet can operate at 20 K at 67 % of its critical current.
Collapse
Affiliation(s)
- M Majoros
- Ohio State University, Columbus, OH 43210, USA
| | | | - M Parizh
- General Electric Global Reseach, Niskayuna, NY, USA
| | - F Wan
- FermiLab, Batavia, IL, USA
| | | | - D Doll
- Hyper Tech Research, Inc., Columbus, OH, USA
| | - M Tomsic
- Hyper Tech Research, Inc., Columbus, OH, USA
| | | |
Collapse
|
11
|
Li Q, Wan F, Zhao M. Distinct soil microbial communities under Ageratina adenophora invasions. Plant Biol (Stuttg) 2022; 24:430-439. [PMID: 35050505 DOI: 10.1111/plb.13387] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 12/19/2021] [Indexed: 06/14/2023]
Abstract
Ageratina adenophora is one of the most hazardous invasive weeds in China. It can form a single species community quickly and cause extensive ecological harm. The belowground microbial community can participate in nutrient transformation in soil and plays an important role in the invasiveness of exotic plant species. We selected sampling sites with different invasion levels of A. adenophora. The soil property and soil biogeochemical activity were measured in both bulk and rhizosphere soil under the aggressive weed A. adenophora and under adjacent native plants. The composition of bacterial communities was investigated using high-throughput 16S rRNA gene sequencing. We found that the rhizosphere habitat selectively accumulated Sphingomonas and Steroidobacter and reduced the abundance of Gaiella and Gp6 regardless of plant host. The presence of A. adenophora caused a switch in microbial composition from Aeromicrobium and Marmoricola to Reyranella and Bradyrhizobium in the bulk soil, and from Gp4, Pirellula, Lysobacter and Aridibacterrae to Reyranella and Streptomyces in the rhizosphere soil. We also revealed specific microbes that closely related with N-cycling processes. In addition, soil pH was the main factor affecting microbial communities in both bulk and rhizosphere soil. Our study confirmed that the rhizosphere environment imposed homogenous microbial communities. The invasion of A. adenophora selected specialized bacterial communities in soils and specific microbes that potentially mediated soil nutrition cycling. Our findings provide ecological explanation to explain how the underground microbes help A. adenophora invasive.
Collapse
Affiliation(s)
- Q Li
- College of Plant Protection, Hunan Agricultural University, Changsha, Hunan, China
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - F Wan
- College of Plant Protection, Hunan Agricultural University, Changsha, Hunan, China
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, China
| | - M Zhao
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| |
Collapse
|
12
|
Wan F, Xu L, Ruan Z, Luo Q. Genomic and Transcriptomic Analysis of Colistin-Susceptible and Colistin-Resistant Isolates Identify Two-Component System EvgS/EvgA Associated with Colistin Resistance in Escherichia coli. Infect Drug Resist 2021; 14:2437-2447. [PMID: 34234474 PMCID: PMC8254184 DOI: 10.2147/idr.s316963] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 06/15/2021] [Indexed: 12/02/2022] Open
Abstract
Purpose Colistin is one of the last-resort antimicrobial agents that combat the increasing threat of multi-drug resistant (MDR) gram-negative bacteria. Based on the known mechanism of colistin resistance which contributes to chromosomal mutations involved in the synthesis and modification of lipopolysaccharide (LPS), we explored the regulatory genes mediate colistin resistance, by whole genome sequencing and transcriptome analysis. Materials and Methods In this study, a colistin-resistant (Colr) strain Escherichia coli ATCC 25922-R was generated from colistin-sensible (Cols) strain E. coli ATCC 25922 by colistin induction. We compared the genome and transcriptome sequencing result from Cols and Colr strain. MALDI-TOF mass spectrometry was used to detect LPS. Results Genomic analysis and complementation experiment demonstrated the PmrB amino acid substitution in ATCC 25922-R (L14R) conferred the colistin resistance phenotype. Results of RNA sequencing (RNA-Seq) and comparative transcriptome analysis indicated that the two-component system EvgS/EvgA is highly involved in the global regulation of colistin resistance. Conclusion This study demonstrated that PmrB L14R amino acid substitution resulted in colistin resistance, and two-component system EvgS/EvgA might participate in colistin resistance in E. coli.
Collapse
Affiliation(s)
- Fen Wan
- School of Laboratory Medicine, Hangzhou Medical College, Hangzhou, Zhejiang, People's Republic of China
| | - Linna Xu
- School of Laboratory Medicine, Hangzhou Medical College, Hangzhou, Zhejiang, People's Republic of China
| | - Zhi Ruan
- Department of Clinical Laboratory, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, 310016, People's Republic of China
| | - Qixia Luo
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital of Medical School, College of medicine, Zhejiang University, Hangzhou, 310003, People's Republic of China
| |
Collapse
|
13
|
Meagher M, Hakimi K, Soliman S, Yuan J, Patil D, Saito K, Javier-Desolges J, Yasuda Y, Wan F, Fujii Y, Master V, Derweesh I. Impact of post-operative proteinuria on development of CKD: Analysis of functional outcomes post nephrectomy. Eur Urol 2021. [DOI: 10.1016/s0302-2838(21)00999-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
14
|
Wan F, Feng X, Yin J, Gao H. Distinct H 2O 2-Scavenging System in Yersinia pseudotuberculosis: KatG and AhpC Act Together to Scavenge Endogenous Hydrogen Peroxide. Front Microbiol 2021; 12:626874. [PMID: 34025596 PMCID: PMC8139631 DOI: 10.3389/fmicb.2021.626874] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 11/07/2020] [Accepted: 03/22/2021] [Indexed: 01/09/2023] Open
Abstract
To colonize in the digestive tract of animals and humans, Yersinia pseudotuberculosis has to deal with reactive oxygen species (ROS) produced by host cells and microbiota. However, an understanding of the ROS-scavenging systems and their regulation in this bacterium remains largely elusive. In this study, we identified OxyR as the master transcriptional regulator mediating cellular responses to hydrogen peroxide (H2O2) in Y. pseudotuberculosis through genomics and transcriptomics analyses. OxyR activates transcription of diverse genes, especially the core members of its regulon, including those encoding catalases, peroxidases, and thiol reductases. The data also suggest that sulfur species and manganese may play a particular role in the oxidative stress response of Y. pseudotuberculosis. Among the three H2O2-scavenging systems in Y. pseudotuberculosis, catalase/peroxidase KatE functions as the primary scavenger for high levels of H2O2; NADH peroxidase alkyl hydroperoxide reductase (AhpR) and catalase KatG together are responsible for removing low levels of H2O2. The simultaneous loss of both AhpC (the peroxidatic component of AhpR) and KatG results in activation of OxyR. Moreover, we found that AhpC, unlike its well-characterized Escherichia coli counterpart, has little effect on protecting cells against toxicity of organic peroxides. These findings provide not only novel insights into the structural and functional diversity of bacterial H2O2-scavenging systems but also a basic understanding of how Y. pseudotuberculosis copes with oxidative stress.
Collapse
Affiliation(s)
- Fen Wan
- College of Laboratory Medicine, Hangzhou Medical College, Hangzhou, China
| | - Xue Feng
- Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Jianhua Yin
- College of Biotechnology and Bioengineering, Zhenjiang University of Technology, Hangzhou, China
| | - Haichun Gao
- Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, China
| |
Collapse
|
15
|
Luo Q, Wan F, Yu X, Zheng B, Chen Y, Gong C, Fu H, Xiao Y, Li L. MDR Salmonella enterica serovar Typhimurium ST34 carrying mcr-1 isolated from cases of bloodstream and intestinal infection in children in China. J Antimicrob Chemother 2021; 75:92-95. [PMID: 31580437 DOI: 10.1093/jac/dkz415] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 05/20/2019] [Accepted: 09/05/2019] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES Children are vulnerable to Salmonella infection due to their immature immune system. Cases of infection with mcr-1-harbouring Salmonella in child inpatients have not been reported in China before. METHODS Salmonella isolates from gastroenteritis and bacteraemia were screened using primers targeting mcr-1. Complete genome sequences of mcr-1-harbouring isolates were determined using the PacBio RS II platform. The transferability of mcr-1-harbouring plasmids was verified by conjugation. RESULTS We investigated two mcr-1-carrying polymyxin-resistant Salmonella enterica serovar Typhimurium ST34 isolates, S61394 and S44712, from bloodstream and intestinal Salmonella infection of two child inpatients, respectively. Both isolates were non-susceptible to commonly used antibiotics for children that compromised the success of clinical treatment and infection control. The mcr-1-harbouring plasmids pLS61394-MCR and pLS44712-MCR (from S61394 and S44712, respectively) were both conjugative pHNSHP45-2-like IncHI2-type epidemic plasmids carrying multiple resistance genes. Compared with pHNSHP45-2, a ∼33 kb insertion region encoding Tn7 transposition protein and heavy metal resistance proteins was identified in pLS61394-MCR, which might enhance adaptation of bacteria carrying this plasmid to various ecological niches. The phylogenetic tree of worldwide mcr-harbouring Salmonella indicated a host preference of mcr and a worldwide and cross-sectoral prevalence of the mcr-positive Salmonella ST34 clone. CONCLUSIONS To our knowledge, for the first time we report completed whole genomes of mcr-1-positive MDR Salmonella Typhimurium ST34 isolated from infected children in China, suggesting that improved surveillance is imperative for tackling the dissemination of mcr-harbouring MDR Salmonella Typhimurium ST34.
Collapse
Affiliation(s)
- Qixia Luo
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Fen Wan
- College of Laboratory Medicine, Hangzhou Medical College, Hangzhou, China
| | - Xiao Yu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Beiwen Zheng
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Yunbo Chen
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Chenhui Gong
- Bingjiang College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Hao Fu
- Bingjiang College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yonghong Xiao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Lanjuan Li
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| |
Collapse
|
16
|
Wan F, Ge Z. [Textual research on lost ancient Chinese medical books in Bencao Tujing]. Zhonghua Yi Shi Za Zhi 2021; 51:24-27. [PMID: 33794580 DOI: 10.3760/cma.j.cn112155-20201229-00204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Bencao Tujing(, Illustration Classics for Materia Medica) occupies an irreplaceable academic position in the academic history of Chinese Materia Medica. It was written in the early Song Dynasty. The contents of Chinese medical books before Song Dynasty have not been revised by Song Dynasty officials, and the original appearance of earlier documents have been preserved. Domestic and foreign scholars mainly focus on the textual research of Chinese Materia medica patterns, and academic value research. The special research on the Lost ancient Chinese medical books were relatively rare. According to the names of"XX Fang"or"Someone Fang"in Bencao Tujing, about 46 kinds of Lost ancient Chinese medical books have been found. Taking Wei Zhou's Du Xing Fang, Liu Yuxi's Chuan Xin Fang, Tian Bao Dan Fang Tu (Tian Bao Dan Xing Fang) as examples, it is found that Lost ancient Chinese medical books recorded in Bencao Tujing have abundant materials and clear clues, which have further exploration space for the research and collection of Chinese medical books.
Collapse
Affiliation(s)
- F Wan
- China Institute for History of Medicine and Medical Literature, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Z Ge
- Institute of Information on Traditional Chinese Medicine, China Academy of Chinese Medical Sciences, Beijing 100700, China
| |
Collapse
|
17
|
Huang F, Wang Q, Yan T, Tang J, Hou X, Shu Z, Wan F, Yang Y, Qu J, Zhou X. The Role of the Dopamine D2 Receptor in Form-Deprivation Myopia in Mice: Studies With Full and Partial D2 Receptor Agonists and Knockouts. Invest Ophthalmol Vis Sci 2021; 61:47. [PMID: 32572456 PMCID: PMC7415310 DOI: 10.1167/iovs.61.6.47] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Purpose The purpose of this study was to explore the role and mechanism of D2 receptor (D2R) involvement in myopia development and the effects of the full D2R agonist quinpirole and partial D2R agonist aripiprazole on postnatal refractive development and form-deprivation myopia (FDM). Methods C57BL/6 (“B6”) mice, raised either in a visually normal or unilateral form-deprivation environment, were divided into three subgroups, including an intraperitoneally injected (IP) vehicle group and two quinpirole (1 and 10 µg/g body weight) treatment groups. The effects of quinpirole on FDM were further verified in D2R-knockout (KO) mice and corresponding wild-type littermates. Then, the modulation of normal vision development and FDM by aripiprazole (1 and 10 µg/g body weight, IP) was assessed in C57BL/6 mice. All biometric parameters were measured before and after treatments, and retinal cyclic adenosine phosphate (cAMP) and phosphorylated ERK (pERK) levels were analyzed to assess D2R-mediated signal transduction. Results Neither quinpirole nor aripiprazole affected normal refractive development. FDM development was inhibited by quinpirole at low dose but enhanced at high dose, and these bidirectional effects were validated by D2R-specificity. FDM development was attenuated by the partial D2R agonist aripiprazole, at high dose but not at low dose. Quinpirole caused a dose-dependent reduction in cAMP levels, but had no effect on pERK. Aripiprazole reduced cAMP levels at both doses, but caused a dose-dependent increase of pERK in the form-deprived eyes. Conclusions Reduction of D2R-mediated signaling contributes to myopia development, which can be selectively attenuated by partial D2R agonists that activate D2Rs under the low dopamine levels that occur with FDM.
Collapse
|
18
|
Wang Y, Xie Y, Dong ZC, Jiang XJ, Gong P, Lu J, Wan F. Levels of sgRNA as a Major Factor Affecting CRISPRi Knockdown Efficiency in K562 Cells. Mol Biol 2021. [DOI: 10.1134/s0026893321010143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
19
|
Wang Y, Xie Y, Dong ZC, Jiang XJ, Gong P, Lu J, Wan F. [Levels of sgRNA as a Major Factor Affecting CRISPRi Knockdown Efficiency in K562 Cells]. Mol Biol (Mosk) 2021; 55:86-95. [PMID: 33566028 DOI: 10.31857/s0026898421010146] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 04/27/2020] [Indexed: 11/24/2022]
Abstract
To determine how nuclease deactivated Cas9 (dCas9) or single-guide RNA (sgRNA) expression levels affect the knockdown efficiency of CRISPRi, we created K562 cell clones expressing KRAB-dCas9 protein either with the inducible Tet-on system or with the constitutive SFFV promotor. Single clones were selected by fluorescence-activated cell sorting (FACS) for further study. Six genes with various expression levels were targeted using lentiviral sgRNA from two libraries in four cell clones with various KRAB-dCas9 expression levels. The expression level of dCas9 protein/sgRNA levels and the knockdown efficiency were determined by flow cytometry. The cell clone with the highest KRAB-dCas9 expression level achieved effective CRISPRi knockdown. The data describing this clone were statistically different from that on other clones, indicating the strong KRAB-dCas9 expression might be a prerequisite for CRISPRi. By adopting different multiplicity of infection (MOI) in lentiviral transduction of this clone, we modified the expression level of sgRNA and found that the knockdown efficiency was neither affected by the target gene expression level nor correlated with KRAB-dCas9 levels, which remained relatively constant across all knockdown experiments (coefficient of variation = 2.2%). As an example, the following levels of the knockdowns: 74.72, 72.28 and 39.08% for mmadhc, rpia and znf148 genes, respectively, were achieved. These knockdown efficiencies correlated well with the respective sgRNA expression levels. Linear regression models built using this data indicate that the knockdown efficiency may be significantly affected by the levels of both KRAB-dCas9 and sgRNA. Notably, the sgRNA levels have greater impact, being a major factor affecting CRISPRi efficiency.
Collapse
Affiliation(s)
- Y Wang
- College of Life Sciences, Inner Mongolia Agricultural University, Inner Mongolia, 010010 China
| | - Y Xie
- College of Science, Inner Mongolia Agricultural University, Inner Mongolia, 010010 China
| | - Z C Dong
- College of Life Sciences, Inner Mongolia Agricultural University, Inner Mongolia, 010010 China
| | - X J Jiang
- College of Life Sciences, Inner Mongolia Agricultural University, Inner Mongolia, 010010 China
| | - P Gong
- College of Life Sciences, Inner Mongolia Agricultural University, Inner Mongolia, 010010 China
| | - J Lu
- College of Life Sciences, Inner Mongolia Agricultural University, Inner Mongolia, 010010 China
| | - F Wan
- College of Life Sciences, Inner Mongolia Agricultural University, Inner Mongolia, 010010 China
| |
Collapse
|
20
|
Dutt R, Meagher M, Patil D, Saito K, Patel D, Ghali F, Keiner C, Miller N, Bradshaw A, Wan F, Yasuda Y, Fujii Y, Master V, Derweesh I. Impact of diabetes mellitus on functional and survival outcomes in renal cell carcinoma: An international multicenter study. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)32709-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
|
21
|
Wan F, Sumption MD, Rindfleisch MA, Collings EW. The Role of CHPD and AIMI processing on enhancing J C and transverse connectivity of in-situ MgB 2 strand. IOP Conf Ser Mater Sci Eng 2020; 756:012018. [PMID: 34584538 PMCID: PMC8475811 DOI: 10.1088/1757-899x/756/1/012018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Research into in-situ MgB2 strand has been focused on improvements in J C through reduction of porosity. Both of cold-high-pressure-densification (CHPD) and advanced-internal-magnesium-infiltration (AIMI) techniques can effectively remove the voids in in-situ MgB2 strands. This study shows the nature of the reduced porosity for in-situ MgB2 strands lies on increases in transverse grain connectivity as well as longitudinal connectivity. The CHPD method bi-axially applying 1.0 GPa and 1.5 GPa yielded 4.2 K J CM∥s of 9.6 × 104 A/cm2 and 8.5 × 104 A/cm2 at 5 T, respectively, with compared with 6.0 × 104 A/cm2 for typical powder-in-tube (PIT) in-situ strand. Moreover, AIMI-processed monofilamentary MgB2 strand obtained even higher J Cs and transverse grain connectivity than the CHPD strands.
Collapse
Affiliation(s)
- F Wan
- Center for Superconductor and Magnetic Materials, Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA
| | - M D Sumption
- Center for Superconductor and Magnetic Materials, Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA
| | | | - E W Collings
- Center for Superconductor and Magnetic Materials, Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA
| |
Collapse
|
22
|
Guan Z, Guan X, Gu K, Lin X, Lin J, Zhou W, Xu M, Wan F, Zhang Z, Song C. Short-term outcomes of on- vs off-pump coronary artery bypass grafting in patients with left ventricular dysfunction: a systematic review and meta-analysis. J Cardiothorac Surg 2020; 15:84. [PMID: 32393284 PMCID: PMC7216614 DOI: 10.1186/s13019-020-01115-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 12/19/2019] [Accepted: 04/27/2020] [Indexed: 11/16/2022] Open
Abstract
Objectives Does the manipulation of the off-pump CABG (OPCAB) in patient with depressed left ventricular function is better than on-pump CABG (ONCAB) approach in in-hospital mortality and morbidities? Here we undertook a meta-analysis of the best evidence available on the comparison of primary and second clinical outcomes of the off-pump and on-pump CABG. Design Systematic literature reviewer and meta-analysis. Data sources PubMed, EMBASE, Web of science and Cochrane Center Registry of Controlled Trials were searched the studies which comparing the use of the off-pump CABG(OPCAB) and on-pump CABG (ONCAB) for patients with LVD during January 1990.1 to January 2018. Eligibility criteria All observation studies and randomized controlled trials comparing on-pump and off-pump as main technique for multi-vessel coronary artery disease (defined as severe stenosis (>70%) in at least 2 major diseased coronary arteries) with left ventricular dysfunction(defined as ejection fraction (EF) 40% or less) were included. Data extraction and synthesis Authors will screen and select the studies extract the following data, first author, year of publication, trial characters, study design, inclusion and exclusion criteria, graft type, clinical outcome, assess the risk of bias and heterogeneity. Study-specific estimates will pool through the modification of the Newcastle-Ottawa scale for the quality of study and while leave-one-out analysis will be used to detect the impact of individual studies on the robustness of outcomes. Results Among the 987 screened articles, a total of 16 studies (32,354 patients) were included. A significant relationship between patient risk profile and benefits from OPCAB was found in terms of the 30-day mortality (odds ratio [OR], 0.84; 95% confidence interval [CI], 0.73–0.97; P = 0.02), stroke (OR, 0.69; 95% CI, 0.55–0.86; P = 0.00), myocardial infarction (MI) (OR, 0.71; 95% CI, 0.53–0.96; P = 0.02), renal failure (OR, 0.71; 95% CI, 0.55–0.93; P = 0.01), pulmonary complication (OR, 0.68; 95% CI, 0.52–0.90; P = 0.01), infection (OR, 0.67; 95% CI, 0.49–0.91; P = 0.00),postoperative transfusion (OR, 0.25; 95% CI, 0.08–0.84; P = 0.02) and reoperation for bleeding (OR, 0.56; 95% CI, 0.41–0.75; P = 0.00). There was no significant difference in atrial fibrillation (AF) (OR, 0.96;95%; CI, 0.78–1.41; P = 0.56) and neurological dysfunction (OR, 0.88; 95% CI, 0.49–1.57; P = 0.65). Conclusions Compared with the on-pump CABG with LVD, using the off-pump CABG is a better choice for patients with lower mortality, stroke, MI, RF, pulmonary complication, infection, postoperative transfusion and reoperation for bleeding. Further randomized studies are warranted to corroborate these observational data.
Collapse
Affiliation(s)
- Zhiyuan Guan
- Department of Cardiology surgery, Peking University Third Hospital, 49 North Garden Rd., Haidian District, Beijing, 100191, China
| | | | - Kaiyun Gu
- Department of Cardiology surgery, Peking University Third Hospital, 49 North Garden Rd., Haidian District, Beijing, 100191, China
| | - Xuanqi Lin
- Beijing University of Technology, Beijing, 100124, China
| | - Jin Lin
- Department of Cardiology surgery, Peking University Third Hospital, 49 North Garden Rd., Haidian District, Beijing, 100191, China
| | - Wenjun Zhou
- Department of Cardiology surgery, Peking University Third Hospital, 49 North Garden Rd., Haidian District, Beijing, 100191, China
| | - Ming Xu
- Department of Cardiology, Peking University Third Hospital, NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Beijing, 100191, China
| | - Fen Wan
- Shanghai East Hospital, Tongji University, 150 Jimo Rd., Pudong District, Shanghai, 100124, China
| | - Zhe Zhang
- Department of Cardiology surgery, Peking University Third Hospital, 49 North Garden Rd., Haidian District, Beijing, 100191, China.
| | - Chunli Song
- Department of Orthopedics, Peking University Third Hospital, 49 North Garden Rd., Haidian District, Beijing, 100191, China.
| |
Collapse
|
23
|
Tao L, Wu Q, Wang J, Xu K, Yu G, Wan F, Qian H, Tang J. A patient with cerebral venous sinus thrombosis induced by facial hyaluronic acid injection. Ann Hematol 2020; 100:2403-2405. [PMID: 32388609 DOI: 10.1007/s00277-020-04038-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 04/10/2020] [Indexed: 11/30/2022]
Affiliation(s)
- Liyuan Tao
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, Jiangsu, China
| | - Qian Wu
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, Jiangsu, China
| | - Jun Wang
- Key Lab of Modern Toxicology (NJMU), Ministry of Education; Department of Toxicology, School of Public Health, Nanjing Medical University, 818 Tianyuan East Road, Nanjing, 211166, Jiangsu, China
| | - Kangjing Xu
- Department of General Surgical, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, Jiangsu, China
| | - Guoqin Yu
- Department of Neurology, Nanjing Jiangbei People's Hospital, 552 Geguan Road, Jiangbei New District, Nanjing, 210000, Jiangsu, China
| | - Fen Wan
- Department of Emergency, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, Jiangsu, China
| | - Huiming Qian
- Department of Ophthalmology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, Jiangsu, China
| | - Jinrong Tang
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, Jiangsu, China.
| |
Collapse
|
24
|
Wei C, Tan X, Liu G, Wan F, Zhao H, Zhang C, You W, Liu X, Zhang X, Jin Q. β-carotene as a dietary factor affecting expression of genes connected with carotenoid, vitamin A and lipid metabolism in the subcutaneous and omental adipose tissue of beef cattle. J Anim Feed Sci 2020. [DOI: 10.22358/jafs/117866/2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
25
|
Ge Z, Wan F. [Textual research on lost articles in Mei Shi Fang]. Zhonghua Yi Shi Za Zhi 2020; 50:33-38. [PMID: 32564535 DOI: 10.3760/cma.j.issn.0255-7053.2020.01.006] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Mei Shi fang() is a lost medical prescription book. Its title came from the "book of classics and history" , a chapter of Zhenglei Bencao (, Collected Classified Materia Medica). 117 pieces of lost articles were preserved in the book. In addition to Zhenglei Bencao, a total of 50 kinds of medical books explicitly quoted some of the lost articles in Mei Shi Fang. Among them, 38 kinds of medical books did not exceed the scope of the articles of Mei Shi Fang cited in Zhenglei Bencao, 12 kinds of medical books contained the articles of Mei Shi Fang which did not quoted in Zhenglei Bencao. It is speculated that Mei Shi Fang may still exist in the Yangtze River basin from 1552 to 1578. In terms of the existing articles of Mei Shi Fang, it has academic origin with Zhouhou Beiji Fang (, Handbook of Prescriptions for Emergency).
Collapse
Affiliation(s)
- Z Ge
- China Institute for History of Medicine and Medical Literature, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - F Wan
- China Institute for History of Medicine and Medical Literature, China Academy of Chinese Medical Sciences, Beijing 100700, China
| |
Collapse
|
26
|
Luo Q, Niu T, Wang Y, Yin J, Wan F, Yao M, Lu H, Xiao Y, Li L. In vitro reduction of colistin susceptibility and comparative genomics reveals multiple differences between MCR-positive and MCR-negative colistin-resistant Escherichia coli. Infect Drug Resist 2019; 12:1665-1674. [PMID: 31354315 PMCID: PMC6580138 DOI: 10.2147/idr.s210245] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 03/30/2019] [Accepted: 05/13/2019] [Indexed: 11/23/2022] Open
Abstract
Objectives: Although resistance to colistin is increasingly reported from clinical settings, the genetic mechanisms that lead to colistin resistance in Escherichia coli have not been fully characterized. Here, we assess the evolution of colistin resistance in clinical isolates of mobilized colistin resistance (MCR)-negative and MCR-positive Escherichia coli. Methods: Spontaneously mutated colistin-resistant progeny were evolved using a step-wise reduction of colistin susceptibility. Resistance phenotypes were confirmed by minimum inhibitory concentration (MIC) determination, and the probable resistance mechanisms were investigated using PCR and reverse transcription-quantitative PCR. Mutated genes of the laboratory-evolved mutants were identified by whole-genome sequencing and comparative genomics. Fitness costs and serum resistance of the mutants were also compared to the corresponding wild types. Results: MCR-negative isolates displayed higher increases in MICs than did MCR-positive isolates following colistin exposure. Upregulation of pmrAB and associated genes was evident among MCR-negative isolates but not MCR-positive isolates. Comparative genomic analysis of mutants and their corresponding wild-types (WTs) revealed numerous mutations in genes encoding membrane transporters and two-component systems. Additionally, MCR-negative mutants exhibited higher fitness costs than MCR-positive mutants compared with their corresponding WTs but displayed similar serum resistance. Conclusion: Our findings reveal multiple differences between MCR-positive and MCR-negative E. coli strains following colistin exposure, which provide reference values for clinical medication.
Collapse
Affiliation(s)
- Qixia Luo
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases , Hangzhou, The First Affiliated Hospital, College of Medicine, Zhejiang University, People's Republic of China
| | - Tianshui Niu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases , Hangzhou, The First Affiliated Hospital, College of Medicine, Zhejiang University, People's Republic of China
| | - Yuan Wang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases , Hangzhou, The First Affiliated Hospital, College of Medicine, Zhejiang University, People's Republic of China
| | - Jianhua Yin
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, People's Republic of China
| | - Fen Wan
- College of Laboratory Medicine, Hangzhou Medical College, Hangzhou, People's Republic of China
| | - Mingfei Yao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases , Hangzhou, The First Affiliated Hospital, College of Medicine, Zhejiang University, People's Republic of China
| | - Haifeng Lu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases , Hangzhou, The First Affiliated Hospital, College of Medicine, Zhejiang University, People's Republic of China
| | - Yonghong Xiao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases , Hangzhou, The First Affiliated Hospital, College of Medicine, Zhejiang University, People's Republic of China
| | - Lanjuan Li
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases , Hangzhou, The First Affiliated Hospital, College of Medicine, Zhejiang University, People's Republic of China
| |
Collapse
|
27
|
Wan F, Yin J, Sun W, Gao H. Oxidized OxyR Up-Regulates ahpCF Expression to Suppress Plating Defects of oxyR- and Catalase-Deficient Strains. Front Microbiol 2019; 10:439. [PMID: 30899252 PMCID: PMC6416212 DOI: 10.3389/fmicb.2019.00439] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 12/17/2018] [Accepted: 02/20/2019] [Indexed: 11/13/2022] Open
Abstract
It is well established that in bacteria, such as Escherichia coli, OxyR is a transcriptional regulator that mediates the response to H2O2 by activating the OxyR regulon, which consists of many genes that play vital roles in oxidative stress resistance. In Shewanella, OxyR regulates, however, in both reduced and oxidized states, the production of H2O2 scavengers, including major catalase KatB and NADH peroxidase AhpCF. Here we showed that the oxyR mutant carried a plating defect manifested as division arresting, a phenotype that can be completely suppressed by an OxyR variant constitutively existing in oxidized form (OxyRL197P). This effect of OxyRL197P could not be solely attributed to the increment in KatB production, since the suppression was also observed in the absence of KatB. Although expression of peroxidase CcpA was greatly activated by OxyRL197P, the contribution of the protein in alleviating plating defect was negligible. We eventually identified AhpCF as the critical factor, when produced at substantially elevated levels by OxyRL197P, to protect the cell from H2O2 attack. Our data indicate that AhpCF is a particularly important peroxidase in oxidative stress resistance in Shewanella, not only playing a compensatory role for catalase, but also by itself providing sufficient protection from killing of H2O2 generated abiotically.
Collapse
Affiliation(s)
- Fen Wan
- College of Laboratory Medicine, Hangzhou Medical College, Hangzhou, China
| | - Jianhua Yin
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China
| | - Weining Sun
- Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Haichun Gao
- Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, China
| |
Collapse
|
28
|
Peng HS, Xie BW, Wan F. [Shang Zhijun, a famous contemporary philogist in herbal literature research]. Zhonghua Yi Shi Za Zhi 2019; 49:34-37. [PMID: 30970423 DOI: 10.3760/cma.j.issn.0255-7053.2019.01.007] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Mr. Shang is a famous herbalist in contemporary China and he devoted his life to the research of herbal literatures. During his lifetime, he has compiled and published a total 19 herbal literatures, 33 works of herbal literature, 268 academic papers, and more than 20 million words of handwritten herbal transcripts. In the field of herbal literature research, he has achieved fruitful results that are highly recognized by the academic communities. The research results can be roughly summarized as four aspects: the establishment of a two-line research network of herbal formulae, the research and collection of lost herbal works, the collation of the survived ancient herbal works and the textual research of famous herbal works. Many of his research results on herbal literature have been included in the modern higher education professional textbooks, and his outstanding academic achievements have opened the door for later scholars, influencing many scholars both home and abroad.
Collapse
Affiliation(s)
- H S Peng
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China
| | - B W Xie
- China Institute for History of Medicine and Medical Literature, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - F Wan
- China Institute for History of Medicine and Medical Literature, China Academy of Chinese Medical Sciences, Beijing 100700, China
| |
Collapse
|
29
|
Zhang ZD, Li H, Wan F, Su XY, Lu Y, Chen DF, Zhang YY. Polysaccharides extracted from the roots of Bupleurum chinense DC modulates macrophage functions. Chin J Nat Med 2018; 15:889-898. [PMID: 29329645 DOI: 10.1016/s1875-5364(18)30004-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Indexed: 01/03/2023]
Abstract
The present study aimed to investigate the effects of polysaccharides extracted from Bupleurum chinense DC (BCPs) on macrophage functions. In the in vivo experiment, 1 mL of 5% sodium thioglycollate was injected into the abdomen of the mice on Day 0 and macrophages were harvested on Day 4. The macrophages were cultured in plates and treated with different concentrations of BCPs and stimulus. Effects of BCPs on macrophage functions were assessed by chemotaxis assay, phagocytosis assay and Enzyme-Linked Immunosorbent Assay (ELISA). Our results showed the enhanced chemotaxis, phagocytosis and secretion of nitric oxide (NO) and inflammatory cytokines by macrophages when treated with BCPs. However, when chemotaxis and phagocytosis were up-regulated by complement components or opsonized particles, BCPs inhibited these effects. Also, the NO production induced by lipopolysaccharides (LPS) was suppressed by BCPs mildly. Moreover, BCPs had an inhibitory effect on the [Ca2+]i elevation of macrophages. These results suggested that BCPs exerted modulatory effects on macrophage functions, which may contribute to developing novel approaches to treating inflammatory diseases.
Collapse
Affiliation(s)
- Zhi-De Zhang
- Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Hong Li
- Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Fen Wan
- Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Xiao-Yu Su
- Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Yan Lu
- Department of Pharmacognosy, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Dao-Feng Chen
- Department of Pharmacognosy, School of Pharmacy, Fudan University, Shanghai 201203, China.
| | - Yun-Yi Zhang
- Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai 201203, China.
| |
Collapse
|
30
|
Zheng DX, Wan F. [Probe of the compiling stylistic rules and layout of Youyou Xin Shu]. Zhonghua Yi Shi Za Zhi 2018; 48:300-303. [PMID: 30646669 DOI: 10.3760/cma.j.issn.0255-7053.2018.05.007] [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] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Youyou Xin Shu(The New Book on Juveniles)《》is a great book of pediatrics in the Southern Song Dynasty. The book quotes a lot of literature.This paper makes an overall arrangement of the citation, sums up the features of the books cited, corrects some wrong compilations from different texts in various existing versions. Therefore, we can infer the publishing ages and time of some literature related.
Collapse
Affiliation(s)
- D X Zheng
- China Institute for History of Medicine and Medical Literature, China Academy of Chinese Medical Sciences, 100700, China
| | | |
Collapse
|
31
|
Su M, Tan X, Yang Q, Zhao C, Wan F, Zhou H. Laboratory comparison of two Aphelinus mali clades for control of woolly apple aphid from Hebei Province, China. Bull Entomol Res 2018; 108:400-405. [PMID: 28958217 DOI: 10.1017/s0007485317000906] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Aphelinus mali (Haldeman) is an effective natural enemy of woolly apple aphid (WAA), Eriosoma lanigerum (Hausmann). Previous studies have found that, with WAA from Shandong Province (Qingdao) as the host, there are significant differences in various biological characteristics between a Shandong clade and Liaoning clade of A. mali. The ability of the Shandong clade to control this aphid was significantly higher than that of the Liaoning clade in Shandong Province. In order to determine whether differences were caused by better adaptation of the Shandong parasitoid clade to the population of the host in that province or if it represents a more general fitness of this clade to control the host regardless of location, we compared the same parasitoid clades with hosts from Hebei Province. We found no significant differences in the developmental threshold temperature, effective accumulated temperature, fecundity, longevity, and oviposition period of the two clades, but the duration of host searching of the Shandong clade was significantly longer than that of the Liaoning clade. The instantaneous attack rate, the control ability (a/Th), the search parameter (Q) of the Shandong clade (0.0946, 0.543, 0.0725) of A. mali were higher than that of the Liaoning clade (0.0713, 0.382, 0.0381), and therefore, with WAA from Hebei Province as the host, the host adaptability of the Shandong clade of A. mali was not worse than that of the Liaoning clade, while the pest control ability of the Shandong clade was still greater than that of the Liaoning clade.
Collapse
Affiliation(s)
- M Su
- College of Agronomy and Plant Protection, Key Lab of Integrated Crop Pest Management of Shandong Province, Qingdao Agricultural University,Qingdao 266109,China
| | - X Tan
- College of Agronomy and Plant Protection, Key Lab of Integrated Crop Pest Management of Shandong Province, Qingdao Agricultural University,Qingdao 266109,China
| | - Q Yang
- General Station of Plant Protection of Shandong Province,Jinan 250100,China
| | - C Zhao
- College of Life Science, Hebei Normal University of Science and Technology,Qinhuangdao 066004,China
| | - F Wan
- College of Agronomy and Plant Protection, Key Lab of Integrated Crop Pest Management of Shandong Province, Qingdao Agricultural University,Qingdao 266109,China
| | - H Zhou
- College of Agronomy and Plant Protection, Key Lab of Integrated Crop Pest Management of Shandong Province, Qingdao Agricultural University,Qingdao 266109,China
| |
Collapse
|
32
|
Deleuze P, Loisance D, Shiiya N, Wan F, Hillion M, Benvenuti C, Heurtematte Y, Cachera J. Irreversible Drop of Systemic Vascular Resistances in Patients Implanted with a Jarvik Total Artificial Heart. Int J Artif Organs 2018. [DOI: 10.1177/039139889101400508] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- P. Deleuze
- Service de Chirurgie Cardiothoracique, Centre de Recherches Chirurgicales (CNRS URA 1431), Hôpital Henri Mondor, Creteil - France
| | - D.Y. Loisance
- Service de Chirurgie Cardiothoracique, Centre de Recherches Chirurgicales (CNRS URA 1431), Hôpital Henri Mondor, Creteil - France
| | - N. Shiiya
- Service de Chirurgie Cardiothoracique, Centre de Recherches Chirurgicales (CNRS URA 1431), Hôpital Henri Mondor, Creteil - France
| | - F. Wan
- Service de Chirurgie Cardiothoracique, Centre de Recherches Chirurgicales (CNRS URA 1431), Hôpital Henri Mondor, Creteil - France
| | - M.L. Hillion
- Service de Chirurgie Cardiothoracique, Centre de Recherches Chirurgicales (CNRS URA 1431), Hôpital Henri Mondor, Creteil - France
| | - C. Benvenuti
- Service de Chirurgie Cardiothoracique, Centre de Recherches Chirurgicales (CNRS URA 1431), Hôpital Henri Mondor, Creteil - France
| | - Y. Heurtematte
- Service de Chirurgie Cardiothoracique, Centre de Recherches Chirurgicales (CNRS URA 1431), Hôpital Henri Mondor, Creteil - France
| | - J.P. Cachera
- Service de Chirurgie Cardiothoracique, Centre de Recherches Chirurgicales (CNRS URA 1431), Hôpital Henri Mondor, Creteil - France
| |
Collapse
|
33
|
Wan F, Kong L, Gao H. Defining the binding determinants of Shewanella oneidensis OxyR: Implications for the link between the contracted OxyR regulon and adaptation. J Biol Chem 2018; 293:4085-4096. [PMID: 29367341 DOI: 10.1074/jbc.ra117.001530] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [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: 12/17/2017] [Revised: 01/16/2018] [Indexed: 01/06/2023] Open
Abstract
It is well-established that OxyR functions as a transcriptional activator of the peroxide stress response in bacteria, primarily based on studies on Escherichia coli Recent investigations have revealed that OxyRs of some other bacteria can regulate gene expression through both repression and activation or repression only; however, the underlying mechanisms remain largely unknown. Here, we demonstrated in γ-proteobacteriumShewanella oneidensis regulation of OxyR on expression of major catalase gene katB in a dual-control manner through interaction with a single site in the promoter region. Under non-stress conditions, katB expression was repressed by reduced OxyR (OxyRred), whereas when oxidized, OxyR (OxyRoxi) outcompeted OxyRred for the site because of substantially enhanced affinity, resulting in a graded response to oxidative stress, from repression to derepression to activation. The OxyR-binding motif is characterized as a combination of the E. coli motif (tetranucleotides spaced by heptanucleotide) and palindromic structure. We provided evidence to suggest that the S. oneidensis OxyR regulon is significantly contracted compared with those reported, probably containing only five members that are exclusively involved in oxygen reactive species scavenging and iron sequestering. These characteristics probably reflect the adapting strategy of the bacteria that S. oneidensis represents to thrive in redox-stratified microaerobic and anaerobic environments.
Collapse
Affiliation(s)
- Fen Wan
- From the Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Linggen Kong
- From the Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Haichun Gao
- From the Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| |
Collapse
|
34
|
Zhang LF, Ling YP, Yang H, Gong YC, Song ZM, Wan F. [Comparison of outcomes of two minimally invasive approaches for multi-vessel coronary revascularization]. Beijing Da Xue Xue Bao Yi Xue Ban 2017; 49:1066-1070. [PMID: 29263483] [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: 06/07/2023]
Abstract
OBJECTIVE To compare the safety and effectiveness of two minimally invasive approaches for multi-vessel coronary revascularization. METHODS From August 2014 to February 2017, 70 consecutive patients who underwent minimally invasive coronary artery bypass grafting in Peking University Third Hospital were randomly divided into two groups. In one group, 40 patients underwent staged-hybrid coronary revascularization (staged-HCR) treatment; in the other group, 30 patients underwent minimally invasive total arterial revascularization with bilateral internal thoracic artery (BITA). In staged -HCR group, the patients underwent minimally invasive direct coronary artery bypass grafting (MIDCAB) and percutaneous coronary intervention (PCI) procedure for treatment of multi-vessel disease. In BITA group, the patients underwent total arterial coronary artery bypass grafting with composite "Y" BITA graft. Preoperative and postoperative data of the two groups, including postoperative blood usage, mechanical ventilation time, domiciling duration in intensive care unit (ICU), major adverse cerebral and cardiovascular event (MACCE), and postoperative coronary angiography results were compared, in order to evaluate the safety and effectiveness of these surgical approaches. RESULTS The preoperative characteristics of 70 patients in the two groups showed no significant difference. All the patients underwent successfully, elective minimally invasive multi-vessel coronary artery bypass grafting as scheduled preoperatively. Postoperative result showed the patients in staged-HCR group took advantages in less postoperative mechanical ventilation time [Staged-HCR group (11.2±8.7) h vs. BITA group (18.3±9.1) h, P=0.013], shorter domiciling duration in ICU [Staged-HCR group (26.29±4.05) h vs. BITA group (44.74±28.75) h, P=0.022], and less total drainage [Staged-HCR group (695.57±250.46) mL vs. BITA group (1 103.26±547.44) mL, P=0.03] than the patients in the group of minimally invasive total arterial revascularization with BITA. Postoperative in hospital coronary angiography showed satisfactory graft patency rates in both groups [97.5% in Staged-HCR group vs. 97.8% in BITA group]. No MACCE occurred in both groups during hospitalization. CONCLUSION Staged-HCR is a feasible method for the treatment of multi-vessel revascularization involving right coronary artery. Minimally coronary revascularization with BITA is associated with superior long-term graft patency and it's recommended for patients who could not tolerate dual-antiplatelet therapy. This study shows that both minimally invasive surgical approaches are safe and effective for treatment of patients with multi-vessel coronary artery disease.
Collapse
Affiliation(s)
- L F Zhang
- Department of Cardiac Surgery, Peking University Third Hospital, Beijing 100191, China
| | - Y P Ling
- Department of Cardiac Surgery, Peking University Third Hospital, Beijing 100191, China
| | - H Yang
- Department of Cardiac Surgery, Peking University Third Hospital, Beijing 100191, China
| | - Y C Gong
- Department of Cardiac Surgery, Peking University Third Hospital, Beijing 100191, China
| | - Z M Song
- Department of Cardiac Surgery, Peking University Third Hospital, Beijing 100191, China
| | - F Wan
- Department of Cardiac Surgery, Peking University Third Hospital, Beijing 100191, China
| |
Collapse
|
35
|
Chen S, Zhi Z, Ruan Q, Liu Q, Li F, Wan F, Reinach PS, Chen J, Qu J, Zhou X. Bright Light Suppresses Form-Deprivation Myopia Development With Activation of Dopamine D1 Receptor Signaling in the ON Pathway in Retina. Invest Ophthalmol Vis Sci 2017; 58:2306-2316. [PMID: 28431434 DOI: 10.1167/iovs.16-20402] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose To determine whether dopamine receptor D1 (D1R) signaling pathway activation by bright light (BL) in specific retinal neuronal cell types contributes to inhibiting form-deprivation myopia (FDM) in mice. Methods Mice (3-weeks old) were raised under either normal light (NL: 100-200 lux) or BL (2500-5000 lux) conditions with or without form deprivation. Refraction changes were evaluated with an eccentric infrared photorefractor, and ocular axial components with optical coherence tomography. The D1R antagonist, SCH39166, was intraperitoneally injected daily to evaluate if BL mediates declines in FDM development through D1R activation. Six different biomarkers of retinal neuronal types delineated differential distribution of D1R expression. c-Fos and phosphorylated tyrosine hydroxylase (p-TH) immunofluorescent staining evaluated D1R receptor activation and dopamine synthesis, respectively. Results Bright light exposure for 4 weeks (6 hours per day) inhibited FDM development by reducing ocular elongation and shifting refraction toward hyperopia compared with changes occurring in NL. SCH39166 injections completely reversed the inhibitory effects of BL on both refraction and ocular elongation. Bright light increased the number of cells expressing p-TH and c-fos. Increases in c-fos+ cells occurred mainly in D1R+ bipolar cells (BCs), especially D1R+ ON-BCs. Conclusions Bright light increases D1R activity in the BCs of the ON pathway, which is associated with less myopic shift and ocular elongation than those occurring in NL. These declines suggest that increased D1R activity in the ON pathway contributes to the BL suppression of FDM development in mice.
Collapse
Affiliation(s)
- Si Chen
- School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China 2State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health P. R. China and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China
| | - Zhina Zhi
- School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China 2State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health P. R. China and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China
| | - Qingqing Ruan
- School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China 2State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health P. R. China and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China
| | - Qingxia Liu
- School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China 2State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health P. R. China and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China
| | - Fen Li
- School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China 2State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health P. R. China and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China
| | - Fen Wan
- School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China 2State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health P. R. China and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China
| | - Peter S Reinach
- School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China 2State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health P. R. China and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China
| | - Jiangfan Chen
- School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China 2State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health P. R. China and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China
| | - Jia Qu
- School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China 2State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health P. R. China and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China
| | - Xiangtian Zhou
- School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China 2State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health P. R. China and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China
| |
Collapse
|
36
|
Yang J, Su J, Wan F, Yang N, Jiang H, Fang M, Xiao H, Wang J, Tang J. Tissue kallikrein protects against ischemic stroke by suppressing TLR4/NF-κB and activating Nrf2 signaling pathway in rats. Exp Ther Med 2017; 14:1163-1170. [PMID: 28810574 DOI: 10.3892/etm.2017.4614] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [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: 03/17/2016] [Accepted: 03/24/2017] [Indexed: 01/04/2023] Open
Abstract
Brain damage following cerebral ischemia-reperfusion (I/R) is a complicated pathophysiological course, in which inflammation and oxidative stress have been suggested to serve an important role. Toll-like receptor 4 (TLR4) has been suggested to be involved in secondary inflammatory process in cerebral ischemia. Nuclear factor erythroid 2-related factor 2 (Nrf2), an important regulator of the antioxidant host defense, maintains the cellular redox homeostasis. Tissue kallikrein (TK) has been proven to elicit a variety of biological effects in ischemic stroke through its anti-inflammatory and anti-oxidant properties. However, the mechanisms underlying its beneficial effects remain poorly defined. The present study examined the hypothesis that TK attenuates ischemic cerebral injury via the TLR4/nuclear factor-κB (NF-κB) and Nrf2 signaling pathways. Using a transient rat middle cerebral artery occlusion (MCAO) model, the effects of immediate and delayed TK treatment subsequent to reperfusion were investigated. The neurological deficits, infarct size, and the expression of TLR4/NF-κB and Nrf2 pathway in ischemic brain tissues were measured at 24 following MCAO. The results indicated that TK immediate treatment significantly improved neurological deficits and reduced the infarct size, accompanied by the inhibition of TLR4 and NF-κB levels, and the activation of Nrf2 pathway. Furthermore, TK delayed treatment also exerted neuroprotection against I/R injury. However, the neuroprotective effect of TK immediate treatment was better compared with that of TK delayed treatment. In conclusion, the results indicated that TK protected the brain against ischemic injury in rats after MCAO through its anti-oxidative and anti-inflammatory effects. Suppression of TLR4/NF-κB and activation of the Nrf2 pathway contributed to the neuroprotective effects induced by TK in cerebral ischemia. Therefore, TK may provide an effective intervention with a wider therapeutic window for ischemic stroke.
Collapse
Affiliation(s)
- Jiawei Yang
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China.,Department of Neurology, The Second Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, P.R. China
| | - Jianhua Su
- Department of Neurology, The Affiliated Jintan Hospital of Medical College of Jiangsu University, Jintan, Jiangsu 213200, P.R. China
| | - Fen Wan
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Nan Yang
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Haibo Jiang
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Mingming Fang
- Department of Neurology, Jiangsu Hospital of Chinese Traditional and Western Medicine, Nanjing, Jiangsu 210028, P.R. China
| | - Hang Xiao
- Department of Neurotoxicology, Nanjing Medical University, Nanjing, Jiangsu 211199, P.R. China
| | - Jun Wang
- Department of Neurotoxicology, Nanjing Medical University, Nanjing, Jiangsu 211199, P.R. China
| | - Jinrong Tang
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| |
Collapse
|
37
|
Wan F, Sumption MD, Rindfleisch MA, Tomsic MJ, Collings EW. Architecture and Transport Properties of Multifilamentary MgB 2 Strands for MRI and Low AC Loss Applications. IEEE Trans Appl Supercond 2017; 27:6200105. [PMID: 28827975 PMCID: PMC5562374 DOI: 10.1109/tasc.2016.2632419] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Standard in-situ type MgB2 strands manufactured by Hyper Tech Inc have 19 - 36 subelements, a monel outer sheath, and a Cu interfilamentary matrix. Typical transport Jc s of the strands are 2×105 A/cm2 with n-values of 20 - 30 at 4.2 K and 5 T. This work introduces two new MgB2 conductor designs. First, a new class of MgB2 strand is designed for magnetic resonance imaging applications. This type has a higher Cu content designed to enhance protection of a magnet wound with it, and a larger diameter to increase the critical current. Second, a new class of low AC loss MgB2 strand with high filament count and a high resistance matrix is discussed. Transport properties at 4.2 K and fields up to 10 T are reported. Optical techniques are used to study the macro- and micro-structures of these MgB2 strands.
Collapse
Affiliation(s)
- F Wan
- Center for Superconducting and Magnetic Materials (CSMM), Dept. of Materials Science and Engineering, The Ohio State University, Columbus, OH, USA
| | - M D Sumption
- Center for Superconducting and Magnetic Materials (CSMM), Dept. of Materials Science and Engineering, The Ohio State University, Columbus, OH, USA
| | | | | | - E W Collings
- Center for Superconducting and Magnetic Materials (CSMM), Dept. of Materials Science and Engineering, The Ohio State University, Columbus, OH, USA
| |
Collapse
|
38
|
Han X, Zhu X, Hong Z, Wei L, Ren Y, Wan F, Zhu S, Peng H, Guo L, Rao L, Feng L, Wan J. Structure-Based Rational Design of Novel Inhibitors Against Fructose-1,6-Bisphosphate Aldolase from Candida albicans. J Chem Inf Model 2017; 57:1426-1438. [DOI: 10.1021/acs.jcim.6b00763] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Xinya Han
- International Cooperation Base of Pesticide and Green Synthesis (Hubei), Key Laboratory of Pesticide & Chemical Biology (CCNU), Ministry of Education, Department of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Xiuyun Zhu
- International Cooperation Base of Pesticide and Green Synthesis (Hubei), Key Laboratory of Pesticide & Chemical Biology (CCNU), Ministry of Education, Department of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Zongqin Hong
- International Cooperation Base of Pesticide and Green Synthesis (Hubei), Key Laboratory of Pesticide & Chemical Biology (CCNU), Ministry of Education, Department of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Lin Wei
- International Cooperation Base of Pesticide and Green Synthesis (Hubei), Key Laboratory of Pesticide & Chemical Biology (CCNU), Ministry of Education, Department of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Yanliang Ren
- International Cooperation Base of Pesticide and Green Synthesis (Hubei), Key Laboratory of Pesticide & Chemical Biology (CCNU), Ministry of Education, Department of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Fen Wan
- International Cooperation Base of Pesticide and Green Synthesis (Hubei), Key Laboratory of Pesticide & Chemical Biology (CCNU), Ministry of Education, Department of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Shuaihua Zhu
- International Cooperation Base of Pesticide and Green Synthesis (Hubei), Key Laboratory of Pesticide & Chemical Biology (CCNU), Ministry of Education, Department of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Hao Peng
- International Cooperation Base of Pesticide and Green Synthesis (Hubei), Key Laboratory of Pesticide & Chemical Biology (CCNU), Ministry of Education, Department of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Li Guo
- Hubei Environmental
Monitoring Central Station, Wuhan 430072, Hubei China
| | - Li Rao
- International Cooperation Base of Pesticide and Green Synthesis (Hubei), Key Laboratory of Pesticide & Chemical Biology (CCNU), Ministry of Education, Department of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Lingling Feng
- International Cooperation Base of Pesticide and Green Synthesis (Hubei), Key Laboratory of Pesticide & Chemical Biology (CCNU), Ministry of Education, Department of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Jian Wan
- International Cooperation Base of Pesticide and Green Synthesis (Hubei), Key Laboratory of Pesticide & Chemical Biology (CCNU), Ministry of Education, Department of Chemistry, Central China Normal University, Wuhan 430079, China
| |
Collapse
|
39
|
Ma T, Xu L, Wang H, Guo X, Li Z, Wan F, Chen J, Liu L, Liu X, Chang G, Chen G. Identification of the crucial genes in the elimination and survival process of Salmonella enterica ser. Pullorum in the chicken spleen. Anim Genet 2017; 48:303-314. [PMID: 28176342 DOI: 10.1111/age.12533] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/08/2016] [Indexed: 12/11/2022]
Abstract
Salmonella enterica ser. Pullorum is one of the most easily re-infecting pathogens in poultry production because of its mechanism of escaping from immune elimination. We used the transcriptome method to investigate the variation in gene expression in chicken spleen resulting from the interaction between hosts and S. Pullorum in the survival process. The expression of various genes related to the maturation and activation of B cells was activated before S. Pullorum was eliminated, which might help S. Pullorum escape from the elimination process. The suppression of some genes involved in the fusion of autophagosomes and lysosomes, such as MYO6, was identified and may be regulated by the secretion systems of S. Pullorum. In addition, a large proportion of these differentially expressed genes could be localized in the identified quantitative trait loci regions associated with the antibody response to bacteria. Collectively, these identified genes provided an outline for further understanding the interaction between chicken immune cells and S. Pullorum in chicken spleen.
Collapse
Affiliation(s)
- T Ma
- Animal Genetic Resources Laboratory, College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - L Xu
- Animal Genetic Resources Laboratory, College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - H Wang
- Animal Genetic Resources Laboratory, College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - X Guo
- Animal Genetic Resources Laboratory, College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - Z Li
- Animal Genetic Resources Laboratory, College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - F Wan
- Animal Genetic Resources Laboratory, College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - J Chen
- Animal Genetic Resources Laboratory, College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - L Liu
- Animal Genetic Resources Laboratory, College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - X Liu
- Poultry Institute, Chinese Academy of Agricultural Sciences, Yangzhou, Jiangsu, 225125, China
| | - G Chang
- Animal Genetic Resources Laboratory, College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - G Chen
- Animal Genetic Resources Laboratory, College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| |
Collapse
|
40
|
Affiliation(s)
- W. Liu
- University of Southampton; UK
| | | | - F. Bretz
- Novartis Pharma; Basel Switzerland
- Shanghai University of Finance and Economics; People's Republic of China
| | | | - P. Yang
- Chinese University of Hong Kong; People's Republic of China
| |
Collapse
|
41
|
Gong X, Liu Y, Yao S, Zheng J, Wan F, Xiang X, Chai X. Correlation between adiponectin and hemorrhagic shock in mice. Genet Mol Res 2016; 15:gmr7037. [DOI: 10.4238/gmr.15017037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
42
|
Long JP, Wan F, Zhang F, Zhou J, Don LF. DTC chemotherapy regimen is associated with higher incidence of premature ovarian failure in women of reproductive age with breast cancer. Eur Rev Med Pharmacol Sci 2016; 20:1087-1092. [PMID: 27049261] [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: 06/05/2023]
Abstract
OBJECTIVE Different chemotherapy regimens may contribute differently to the development of Premature Ovarian Failure (POF) in women of reproductive age with breast cancer. Here we evaluated how two different chemotherapy regimens, CAF (tegafur + pirarubicin + ifosfamide) and DTC (docetaxel + pirarubicin + ifosfamide), affect the development of POF. PATIENTS AND METHODS We enrolled 164 women of reproductive age with breast cancer (mean ± SD age of 34.56 ± 9.48 years). The patients were divided into two groups, which were respectively treated with CAF (n = 89) or DTC (n = 75) chemotherapy regimen. Both study groups were comparable in all analyzed characteristics at baseline. Patients were treated with respective chemotherapy regimen for 6 months and followed up for over 12 months after completion of chemotherapy. Study outcomes were occurrence rates of POF, menstrual status and recovery after completion of chemotherapy, and serum levels of follicle stimulating hormone (FSH), luteinizing hormone (LH), and oestradiol (E2). RESULTS At 6 months after completion of chemotherapy, POF incidence rates were significantly lower in the CAF group. Furthermore, the proportion of patients with eumenorrhea, menstrual disorders or chemotherapy-induced amenorrhea in this study group was also significantly different from the DTC group. Similarly, adverse changes of serum levels of FSH, LH and E2 were less pronounced in the CAF group. CONCLUSIONS Both tested chemotherapy regimens can cause POF; however, adverse effects of DCT chemotherapy regimen on ovarian function are more pronounced than those by CAF chemotherapy regimen.
Collapse
Affiliation(s)
- J-P Long
- Department of General Surgery, The Women's Hospital, School of Medicine, Zhejiang University, HangZhou, Zhejiang Province, China.
| | | | | | | | | |
Collapse
|
43
|
Qiu L, Xu L, Guo X, Li Z, Wan F, Liu X, Chen G, Chang G. Gene expression changes in chicken NLRC5 signal pathway associated with in vitro avian leukosis virus subgroup J infection. Genet Mol Res 2016; 15:gmr7640. [DOI: 10.4238/gmr.15017640] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
44
|
Wang HZ, Ma T, Chang GB, Wan F, Liu XP, Lu L, Xu L, Chen J, Chen GH. Single nucleotide polymorphism screening, molecular characterization, and evolutionary aspects of chicken Piwi genes. Genet Mol Res 2015; 14:14802-10. [PMID: 26600541 DOI: 10.4238/2015.november.18.45] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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
The P-element-induced wimpy testis (Piwi) gene is involved in germline stem cell self-renewal, meiosis, RNA silencing, and transcriptional regulation. Piwi genes are relatively well conserved in many species, but their function in poultry species is unclear. In this study, Piwi genes were sequenced using a target-sequence capture assay in quail and 28 breeds of chicken. Single nucleotide polymorphisms (SNPs) and evolutionary aspects of these chicken breeds were then analyzed. We found that SNP sites existed mainly in the introns of a few chicken breeds, and we selected an SNP on intron 4 for further verification by Sanger sequencing, the results of which were similar to those obtained by the target-capture sequencing assay. The evolutionary analysis revealed that there were more mutations in the Chahua and Leghorn breeds than in the other breeds, and that the phylogenetic tree was divided into four main categories that suggested that Piwi is evolutionarily conserved, and mutations in the introns might be associated with gametogenesis. The screened SNPs can be used as candidate markers for Piwi, and our results provide basic information for the further study of Piwi function in poultry.
Collapse
Affiliation(s)
- H Z Wang
- Department of Endodontics and Operative Dentistry, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - T Ma
- Department of Endodontics and Operative Dentistry, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - G B Chang
- Department of Endodontics and Operative Dentistry, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - F Wan
- Department of Endodontics and Operative Dentistry, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - X P Liu
- Department of Endodontics and Operative Dentistry, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - L Lu
- Department of Endodontics and Operative Dentistry, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - L Xu
- Department of Endodontics and Operative Dentistry, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - J Chen
- Department of Endodontics and Operative Dentistry, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - G H Chen
- Department of Endodontics and Operative Dentistry, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| |
Collapse
|
45
|
Shi M, Wan F, Mao Y, Gao H. Unraveling the Mechanism for the Viability Deficiency of Shewanella oneidensis oxyR Null Mutant. J Bacteriol 2015; 197:2179-2189. [PMID: 25897035 PMCID: PMC4455265 DOI: 10.1128/jb.00154-15] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2015] [Accepted: 04/16/2015] [Indexed: 01/22/2023] Open
Abstract
UNLABELLED Oxidative stresses triggered by reactive oxygen species (ROS) that damage various cellular components are unavoidable for virtually all living organisms. In defense, microorganisms have evolved sophisticated mechanisms to sense, respond to, and battle against ROS. Shewanella oneidensis, an important research model for applied and environmental microbes, employs OxyR to mediate the response to H2O2 by derepressing the production of the major H2O2 scavenger KatB as a major means toward these goals. Surprisingly, despite enhanced H2O2 degradation, the oxyR mutant carries a viability deficiency phenotype (plating defect), which can be suppressed by the addition of exogenous iron species. Experiments showed that the defect was not due to iron starvation. Rather, multiple lines of evidence suggested that H2O2 generated abiotically in lysogeny broth (LB) is responsible for the defect by quickly killing mutant cells. We then showed that the iron species suppressed the plating defect by two distinct mechanisms, either as an H2O2 scavenger without involving living cells or as an environmental cue to stimulate an OxyR-independent response to help cells cope with oxidative stress. Based on the suppression of the plating defect by overproduction of H2O2 scavengers in vivo, we propose that cellular components that are vulnerable to H2O2 and responsible for the defect may reside outside the cytoplasm. IMPORTANCE In bacteria, OxyR is the major regulator controlling the cellular response to H2O2. The loss of OxyR results in reduced viability in many species, but the underlying mechanism is unknown. We showed in S. oneidensis that this defect was due to H2O2 generated abiotically in LB. We then showed that this defect could be corrected by the addition of Fe(2+) or catalase to the LB or increased intracellular production of catalase. Further analyses revealed that Fe(2+) was able not only to decompose H2O2 directly but also to stimulate the activity of OxyR-independent H2O2-scavenging enzymes. Our data indicate that iron species play a previously underappreciated role in protecting cells from H2O2 in environments.
Collapse
Affiliation(s)
- Miaomiao Shi
- Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China
- Key Laboratory for Agro-Microbial Research and Utilization, Zhejiang Province, Hangzhou, Zhejiang, China
| | - Fen Wan
- Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China
- Key Laboratory for Agro-Microbial Research and Utilization, Zhejiang Province, Hangzhou, Zhejiang, China
| | - Yinting Mao
- Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China
- Key Laboratory for Agro-Microbial Research and Utilization, Zhejiang Province, Hangzhou, Zhejiang, China
| | - Haichun Gao
- Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China
- Key Laboratory for Agro-Microbial Research and Utilization, Zhejiang Province, Hangzhou, Zhejiang, China
| |
Collapse
|
46
|
Wan F, Mao Y, Dong Y, Ju L, Wu G, Gao H. Impaired cell envelope resulting from arcA mutation largely accounts for enhanced sensitivity to hydrogen peroxide in Shewanella oneidensis. Sci Rep 2015; 5:10228. [PMID: 25975178 PMCID: PMC4432559 DOI: 10.1038/srep10228] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Accepted: 04/07/2015] [Indexed: 01/06/2023] Open
Abstract
Oxidative stress is one of the major challenges that Shewanella encounter routinely because they thrive in redox-stratified environments prone to reactive oxygen species (ROS) formation, letting alone that ROS can be generated endogenously. As respiration is the predominant process for endogenous ROS, regulators mediating respiration have been demonstrated and/or implicated to play a role in oxidative stress response. In our efforts to unveil the involvement of global regulators for respiration in the oxidative stress response, we found that loss of the Arc system increases S. oneidensis sensitivity to H2O2 whereas neither Fnr nor Crp has a significant role. A comparison of transcriptomic profiles of the wild-type and its isogenic arcA mutant revealed that the OxyR regulon is independent of the Arc system. We then provided evidence that the enhanced H2O2 sensitivity of the arcA mutant is due to an increased H2O2 uptake rate, a result of a cell envelope defect. Although one of three proteases of the ArcA regulon when in excess is partially accountable for the envelope defect, the major contributors remain elusive. Overall, our data indicate that the Arc system influences the bacterial cell envelope biosynthesis, a physiological aspect that has not been associated with the regulator before.
Collapse
Affiliation(s)
- Fen Wan
- Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Yinting Mao
- Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Yangyang Dong
- Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Lili Ju
- Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Genfu Wu
- Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Haichun Gao
- Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| |
Collapse
|
47
|
Abid S, Boiron E, Tissot C, Houssaini A, Czibik G, Sawaki D, Marcos E, Wan F, Dubois-Randé J, Hamon M, Derumeaux G, Adnot S. The role of 5-HT2B receptors in development of valvulopathy, cardiomyopathy, and pulmonary hypertension in Fawn-Hooded rats. Rev Mal Respir 2015. [DOI: 10.1016/j.rmr.2015.02.059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
48
|
Wan F, Houssaini A, Abid S, Mouraret N, Rideau D, Gellen B, Marcos E, Amsellem V, Derumeaux G, Dubois-Rande J, Letavernier E, Baud L, Adnot S. Extracellular calpastatin protects against hypoxia-induced pulmonary hypertension (PH) in mice and is elevated in human PH. Rev Mal Respir 2015. [DOI: 10.1016/j.rmr.2015.02.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
49
|
Parpaleix A, Houssaini A, Latiri M, Abid S, Wan F, Amsellem V, Ryffel B, Marcos E, Couillin I, Adnot S. Involvement of interleukin-1 receptor (IL1R1) and myeloid differentiation primary response gene 88 (MyD88) signaling in pulmonary hypertension (PH). Rev Mal Respir 2015. [DOI: 10.1016/j.rmr.2015.02.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
50
|
Houssaini A, Abid S, Wan F, Rideau D, Mouraret N, Breau M, Marcos E, Dubois-Rande J, Derumeaux G, Pende M, Adnot S. Selective TSC1 deletion in smooth muscle results in mTOR signaling activation and development of pulmonary hypertension that can be reversed by rapamycin. Rev Mal Respir 2015. [DOI: 10.1016/j.rmr.2015.02.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|