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Du LM, Hu SJ, Chen XM, Deng YY, Yong HL, Shi RC, Liu JG, Cao ZZ, You YJ, Liu YX, Ma SC, Ma LK, Li XF, Li XM, Hou JB, Ye ZC, Sang T, Cao Y, Liu H, Wei XX, Hu AL, Li YL, Gao HJ. [Survey of Helicobacter pylori levofloxacin and clarithromycin resistance rates and drug resistance genes in Ningxia, 2020-2022]. Zhonghua Yi Xue Za Zhi 2023; 103:2163-2167. [PMID: 37482728 DOI: 10.3760/cma.j.cn112137-20230214-00206] [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] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
Objective: To explore the rate of Helicobacter pylori (Hp) resistance to levofloxacin and clarithromycin and the common mutation patterns of resistance genes in Ningxia, and to assess the concordance between phenotypic resistance and genotypic resistance. Methods: Cross-sectional study. Patients diagnosed with Hp infection in 14 hospitals in Ningxia region from February 2020 to May 2022 were retrospectively selected. Hp strains were isolated from gastric biopsy specimens of Hp-infected patients and subjected to phenotypic drug sensitivity testing and detection of resistance genes to analyze the rate of Hp resistance to levofloxacin and clarithromycin and the common mutation patterns of resistance genes in Ningxia region; and the concordance rate and Kappa concordance test were used to assess the concordance between phenotypic resistance and genotypic resistance. Results: A total of 1 942 Hp strains were isolated and cultured, and among the infections, 1 069 cases (55.0%) were male and 873 cases (45.0%) were female, aged (50.0±12.5) years (15-86 years). The rates of Hp resistance to levofloxacin and clarithromycin in Ningxia were 42.1% (818/1 942) and 40.1% (779/1 942), respectively, and the rate of dual resistance to both was 22.8% (443/1 942). The rate of resistance to levofloxacin and clarithromycin of Hp strains from female patients was higher than in male patients (levofloxacin: 50.4%(440/873) vs 35.4%(378/1 069); clarithromycin: 44.4%(388/873) vs 36.6%(391/1 069), both P<0.001). Among the GyrA gene mutations associated with levofloxacin resistance, the differences in mutation rate of amino acid at positions 87 and 91 were statistically significant in both drug-resistant and sensitive strains(both P<0.001), except for Asn87Thr. Hp strains were statistically significant for levofloxacin (Kappa=0.834, P<0.001) and clarithromycin (Kappa=0.829, P<0.001) had good concordance in resistance at the phenotypic and genotypic levels. Conclusion: The resistance of Hp to levofloxacin and clarithromycin in Ningxia region is severe, and there is good consistency between genotypic and phenotypic resistance.
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Affiliation(s)
- L M Du
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - S J Hu
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - X M Chen
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - Y Y Deng
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - H L Yong
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - R C Shi
- Department of Gastroenterology, Wuzhong People's Hospital, Wuzhong 751199, China
| | - J G Liu
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - Z Z Cao
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - Y J You
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - Y X Liu
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - S C Ma
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - L K Ma
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - X F Li
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - X M Li
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - J B Hou
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - Z C Ye
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - T Sang
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - Y Cao
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - H Liu
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - X X Wei
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - A L Hu
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - Y L Li
- Department of Gastroenterology, the Third Clinical Medical College of Ningxia Medical University, Ningxia Hui Autonomous Region People's Hospital, Yinchuan 750002, China
| | - H J Gao
- Department of Gastroenterology, Tongji Hospital, Tongji University, Institute of Digestive Disease, School of Medicine, Tongji University, Shanghai 200120, China
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Fang J, Nurden P, North P, Nurden AT, Du LM, Valentin N, Wilcox DA. C560Rβ3 caused platelet integrin αII b β3 to bind fibrinogen continuously, but resulted in a severe bleeding syndrome and increased murine mortality. J Thromb Haemost 2013; 11:1163-71. [PMID: 23551977 PMCID: PMC3702628 DOI: 10.1111/jth.12209] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Accepted: 03/13/2013] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND OBJECTIVES β(3)-Deficient megakaryocytes were modified by human β(3)-lentivirus transduction and transplantation to express sufficient levels of a C560Rβ(3) amino acid substitution, for investigation of how an activated αII b β(3) conformation affects platelets in vivo in mice. PATIENT/METHODS As in our previous report of an R560β(3) mutation in a patient with Glanzmann thrombasthenia, R560β(3) murine platelets spontaneously bound antibody that only recognizes activated αII b β3 bound to its ligand, fibrinogen. RESULTS With this murine model, we showed that αII b -R560β3 mutation-mediated continuous binding of fibrinogen occurred in the absence of P-selectin surface expression, indicating that the integrin was in an active conformation, although the platelets circulated in a quiescent manner. Remarkably, only 35% of R560β(3) 'mutant' mice survived for 6 months after transplantation, whereas 87% of C560β(3) 'wild-type' mice remained alive. Pathologic examination revealed that R560β(3) mice had enlarged spleens with extramedullary hematopoiesis and increased hemosiderin, indicating hemorrhage. R560β(3) megakaryocytes and platelets showed abnormal morphology and irregular granule distribution. Interestingly, R560β(3) washed platelets could aggregate upon simultaneous addition of fibrinogen and physiologic agonists, but aggregation failed when platelets were exposed to fibrinogen before activation in vitro and in vivo. CONCLUSIONS The results demonstrate that continuous occupancy of αIIb β3 with fibrinogen disrupts platelet structure and function, leading to hemorrhagic death consistent with Glanzmann thrombasthenia rather than a thrombotic state.
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Affiliation(s)
- J Fang
- Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI 53226, USA
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Chang YX, Qiu YQ, Du LM, Li CF, Wu H. SIMULTANEOUS DETERMINATION OF PALMATINE AND BERBERINE USING CUCURBIT[7]URIL AS MOBILE PHASE ADDITIVE BY HPLC. J LIQ CHROMATOGR R T 2011. [DOI: 10.1080/10826076.2011.593073] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- Y. X. Chang
- a Analytical and Testing Center, Shanxi Normal University , Shanxi Linfen , P.R. China
- b School of Chemistry and Materials Science, Shanxi Normal University , Linfen , P.R. China
| | - Y. Q. Qiu
- a Analytical and Testing Center, Shanxi Normal University , Shanxi Linfen , P.R. China
| | - L. M. Du
- a Analytical and Testing Center, Shanxi Normal University , Shanxi Linfen , P.R. China
| | - C. F. Li
- a Analytical and Testing Center, Shanxi Normal University , Shanxi Linfen , P.R. China
- b School of Chemistry and Materials Science, Shanxi Normal University , Linfen , P.R. China
| | - H. Wu
- a Analytical and Testing Center, Shanxi Normal University , Shanxi Linfen , P.R. China
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Qiao JL, Gong QJ, Du LM, Jin WJ. Spectroscopic study on the photoinduced reaction of fullerene C60 with aliphatic amines and its dynamics--strong short wavelength fluorescence from the adducts. Spectrochim Acta A Mol Biomol Spectrosc 2001; 57:17-25. [PMID: 11209859 DOI: 10.1016/s1386-1425(00)00324-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The photoinduced electron donor acceptor interactions of C60 with eight kinds of aliphatic amines, namely dicthylamine (DEA), triethylamine (TEA), tri-n-amylamine (TAA), propylethylamine (PPA), n-butylamine (BTA), n-heptylamine (HPA) and dodecylamine (DDA) and ethylenediamine (EDA) are reported by a comprehensive spectroscopic study. Experiments show that there is a good discipline with different structure and the length of n-alkyl group both in their ground and excited states. At the same time, a slow reaction takes place between C60 and various amines with a gradual increase in the concentration of various aliphatic amines or the standing of solution, which can be dramatically catalyzed by UV-radiation. The final products can all emit a strong fluorescence at the relatively shorter wavelength around 519 nm. On this basis, the dynamic properties of C60/aphaliticamines including the enthalpy of activation (deltaH++et) and entropy activation (deltaS++et), together with all sorts of influence factors are firstly investigated in this work. The possible reaction mechanisms are explored, also.
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Affiliation(s)
- J L Qiao
- Department of Chemistry, Shanxi University, Taiyuan, PR China
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Du LM, Xu QQ. [Study on the direct determination of auxins by gas chromatography]. Se Pu 2000; 18:160-1. [PMID: 12541597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023] Open
Abstract
A method for the direct determination of auxins, indole acetic acid (IAA), indole-butyric acid (IBA) and naphthylacetic acid (NAA), by gas chromatography with wide-bore capillary column is described. The gas chromatographic conditions were as follows: HP-1 capillary column, 5 m x 0.53 mm i.d., 2.65 microns film, the column temperature 180 degrees C, the temperature of injector 250 degrees C, the temperature of FID detector 260 degrees C, carrier gas: N2 20 mL/min and dibutyl phthalate was used as internal standard. All components and internal standard were separated in 3 min. The relative standard deviations were from 0.61% to 1.14%. The method is simple, rapid, sensitive, good reproducible and satisfactory.
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Affiliation(s)
- L M Du
- Center of Analysis and Test, Shanxi Teacher's University, Linfen 041004, China.
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Du LM, Xu QQ. [Separation and determination of three plant internal hormones by gas chromatography]. Se Pu 2000; 18:67-9. [PMID: 12541461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023] Open
Abstract
A method for the simultaneous separation and determination of three plant internal hormones indole acetic acid (IAA), abscisic acid(ABA) and gibberellic acid(GA) in plant by gas chromatography with wide-bore capillary column is described. The gas chromatographic conditions were as follows: FID detector; HP-1 capillary column, 5 m x 0.53 mm x 2.65 microns film; the column temperature, 220 degrees C; the injector temperature, 250 degrees C; the detector temperature, 280 degrees C, carrier gas, 3.5 mL/min N2; internal standard n-docosane. All components and internal standard were separated in 8 min. The detection limit of IAA, ABA and GA were 0.16, 0.08 and 0.48 mg/L respectively. The relative standard deviations were 2.2%, 1.7% and 2.8% respectively. The linear range were 0.16-80 mg/L(r = 0.9986), 0.08-40 mg/L (r = 0.9993) and 0.48-240 mg/L (r = 0.9991) respectively. The average recoveries were (88.4 +/- 2.4%)%, (92.2 +/- 1.2)% and (91.8 +/- 1.8)% respectively. The method is simple, rapid, sensitive and reproducible.
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Affiliation(s)
- L M Du
- Center of Analysis and Test, Shanxi Teacher's University, Linfen 041000, China
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Du LM, Xu QQ, Wu XL. [Determination of alkaloids in pericarpium papaveris by gas chromatography with wide bore capillary column]. Se Pu 1999; 17:578-9. [PMID: 12552697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023] Open
Abstract
A method for the simultaneous determination of codeine, morphine, thebaine, papaverine and narcotine in pericarpium papaveris by gas chromatography with wide bore capillary column is described. The major components in pericarpium papaveris were extracted with methanol and chloroform by supersonic extraction and evaporation. The residue was dissolved in methanol. The resulting solution was used for analysis. The conditions for determination were: FID detector, HP-1 capillary column, 5 m x 0.53 mm x 2.65 microns film, column temperature 260 degrees C, The method requires 10 minutes for the whole analysis. The average recoveries of codeine, morphine, thebaine, papaverine and narcotine in the sample were 94.0%, 96.5%, 93.8%, 91.0% and 91.4% respectively. The relative standard deviations were from 0.92% to 2.75%. The advantages of this method are simple, rapid, accurate and sensitive.
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Affiliation(s)
- L M Du
- Analytical and Testing Center of Shanxi Teacher's University, Linfen 041000, China
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