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Zou XF, Wu SH, Ma JG, Yin ZQ, Hu ZD, Wang YW, Yang J, Guo RD. 3-O-Methyl-D-Glucose Blunts Cold Ischemia Damage in Kidney via Inhibiting Ferroptosis. Biomed Pharmacother 2024; 173:116262. [PMID: 38394845 DOI: 10.1016/j.biopha.2024.116262] [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: 10/24/2023] [Revised: 01/20/2024] [Accepted: 02/06/2024] [Indexed: 02/25/2024] Open
Abstract
BACKGROUND The glucose derivative 3-O-methyl-D-glucose (OMG) is used as a cryoprotectant in freezing cells. However, its protective role and the related mechanism in static cold storage (CS) of organs are unknown. The present study aimed to investigate the effect of OMG on cod ischemia damage in cold preservation of donor kidney. METHODS Pretreatment of OMG on kidney was performed in an isolated renal cold storage model in rats. LDH activity in renal efflux was used to evaluate the cellular damage. Indicators including iron levels, mitochondrial damage, MDA level, and cellular apoptosis were measured. Kidney quality was assessed via a kidney transplantation (KTx) model in rats. The grafted animals were followed up for 7 days. Ischemia reperfusion (I/R) injury and inflammatory response were assessed by biochemical and histological analyses. RESULTS OMG pretreatment alleviated prolonged CS-induced renal damage as evidenced by reduced LDH activities and tubular apoptosis. Kidney with pCS has significantly increased iron, MDA, and TUNEL+ cells, implying the increased ferroptosis, which has been partly inhibited by OMG. OMG pretreatment has improved the renal function (p <0.05) and prolonged the 7-day survival of the grafting recipients after KTx, as compared to the control group. OMG has significantly decreased inflammation and tubular damage after KTx, as evidenced by CD3-positive cells and TUNEL-positive cells. CONCLUSION Our study demonstrated that OMG protected kidney against the prolonged cold ischemia-caused injuries through inhibiting ferroptosis. Our results suggested that OMG might have potential clinical application in cold preservation of donor kidney.
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Affiliation(s)
- Xun-Feng Zou
- Department of General Surgery, Tianjin First Central Hospital, School of Medicine, Nankai University, Tianjin 300192, China
| | - Shao-Hua Wu
- Clinical Laboratory, Tianjin First Central Hospital, School of Medicine, Nankai University, Tianjin 300192, China
| | - Jian-Gong Ma
- Department of Chemistry and Key Laboratory of Advanced Energy Materials Chemistry (MOE), College of Chemistry, Nankai University, Tianjin 300071, China
| | - Zhi-Qi Yin
- Department of Pathology, Tianjin First Central Hospital, School of Medicine, Nankai University, Tianjin 300192, China
| | - Zhan-Dong Hu
- Department of Pathology, Tianjin First Central Hospital, School of Medicine, Nankai University, Tianjin 300192, China
| | - Yi-Wei Wang
- Department of General Surgery, Tianjin First Central Hospital, School of Medicine, Nankai University, Tianjin 300192, China
| | - Jie Yang
- University hospital, Tianjin Normal University, Tianjin 300192, China
| | - Ren-De Guo
- Department of General Surgery, Tianjin First Central Hospital, School of Medicine, Nankai University, Tianjin 300192, China.
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Gao YM, Wu SH, Shang HX, Yang YL, Zhou BH, Yang X. [Feasibility study of expectant management of different degrees of vaginal fluid in pregnant women with premature rupture of membranes in the second trimester]. Zhonghua Fu Chan Ke Za Zhi 2024; 59:121-129. [PMID: 38389231 DOI: 10.3760/cma.j.cn112141-20230915-00100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
Objective: To investigate the feasibility of expectant management of different degrees of vaginal fluid in pregnant women with premature rupture of membranes in the second trimester. Methods: A retrospective cohort study was conducted to collect 103 pregnant women who were diagnosed with premature rupture of membranes in the second trimester of pregnancy and insisted on continuing the pregnancy in Shanxi Bethune Hospital from July 2012 to July 2022. According to the degree of vaginal fluid, pregnant women were divided into rupture group (with typical vaginal fluid, 48 cases) and leakage group (without typical vaginal fluid, 55 cases). The rupture latency (the time from rupture of membranes to termination of pregnancy), gestational weeks of termination, indications and methods of termination of pregnancy, maternal infection related indicators and perinatal outcomes were compared between the two groups. Univariate regression model was used to analyze the correlation between different degrees of vaginal fluid in pregnant women with premature rupture of membranes and maternal and neonatal outcomes. Results: (1) Obstetric indicators: there was no significant difference in the gestational age of rupture of membranes between the two groups (P>0.05). However, the proportion of rupture latency >28 days in the leakage group was significantly higher than that in the rupture group [42% (23/55) vs 13% (6/48); χ2=33.673, P<0.001], and the incidence of pregnancy termination ≥28 weeks was significantly higher [47% (26/55) vs 19% (9/48); χ2=9.295, P=0.002]. (2) Indications and methods of termination: the incidence of progressive reduction of amniotic fluid as the indication for termination in the leakage group was significantly lower than that in the rupture group [22% (12/55) vs 42% (20/48); χ2=4.715, P=0.030], and the incidence of full-term termination in the leakage group was significantly higher than that in the rupture group [31% (17/55) vs 12% (6/48); χ2=5.008, P=0.025], while there were no significant differences in the indications of termination of pregnancy, including amniotic cavity infection, uterine contraction failure and fetal distress between the two groups (all P>0.05). The incidence of induced labor or spontaneous contraction in the leakage group was significantly lower than that in the rupture group [53% (29/55) vs 81% (39/48); χ2=9.295, P=0.002], while the cesarean section rate and vaginal delivery rate were similar between the two groups (both P>0.05). (3) Infection related indicators: the incidence of amniotic cavity infection in the leakage group was significantly higher than that in the rupture group [31% (17/55) vs 13% (6/48); χ2=4.003, P=0.045]. However, there were no significant differences in the elevation of inflammatory indicators, the positive rate of cervical secretion bacterial culture and the incidence of tissue chorioamnionitis between the two groups (all P>0.05). (4) Perinatal outcomes: the live birth rate in the leakage group was significantly higher than that in the rupture group [51% (28/55) vs 27% (13/48); χ2=5.119, P=0.024]. The proportion of live births with 1-minute Apgar score >7 in the leakage group was significantly higher than that in the rupture group [38% (21/55) vs 17% (8/48); χ2=4.850, P=0.028]. However, there were no significant differences in the birth weight of live births and the incidence of neonatal complications between the two groups (all P>0.05). (5) Univariate regression analysis showed that compared with the rupture group, the leakage group had a higher risk of pregnancy termination at ≥28 gestational weeks (RR=2.521, 95%CI: 1.314-4.838; P=0.002), amniotic infection (RR=2.473, 95%CI: 1.061-5.764; P=0.025), perinatal survival (RR=1.880, 95%CI: 1.104-3.199; P=0.014). Conclusion: Compared with pregnant women with typical vaginal fluid in the second trimester of premature rupture of membranes, expectant treatment for pregnant women with atypical vaginal fluid is more feasible, which could effectively prolong the gestational weeks and improve the perinatal live birth rate.
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Affiliation(s)
- Y M Gao
- Department of Obstetrics and Gynecology, Shanxi Bethune Hospital, the Third Hospital of Shanxi Medical University, Taiyuan 030032, China
| | - S H Wu
- Department of Obstetrics and Gynecology, Shanxi Bethune Hospital, the Third Hospital of Shanxi Medical University, Taiyuan 030032, China
| | - H X Shang
- Department of Obstetrics and Gynecology, Shanxi Bethune Hospital, the Third Hospital of Shanxi Medical University, Taiyuan 030032, China
| | - Y L Yang
- Department of Obstetrics and Gynecology, Shanxi Bethune Hospital, the Third Hospital of Shanxi Medical University, Taiyuan 030032, China
| | - B H Zhou
- Department of Obstetrics and Gynecology, Shanxi Bethune Hospital, the Third Hospital of Shanxi Medical University, Taiyuan 030032, China
| | - X Yang
- Department of Obstetrics and Gynecology, Shanxi Bethune Hospital, the Third Hospital of Shanxi Medical University, Taiyuan 030032, China
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Mi ZZ, Hu HC, Sun JJ, Wu SH. Heating promoted super sensitive electrochemical detection of p53 gene based on alkaline phosphatase and nicking endonuclease Nt.BstNBI-assisted target recycling amplification strategy at heated gold disk electrode. Anal Chim Acta 2023; 1275:341583. [PMID: 37524467 DOI: 10.1016/j.aca.2023.341583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 06/28/2023] [Accepted: 06/30/2023] [Indexed: 08/02/2023]
Abstract
An ultrasensitive electrochemical biosensor for detecting p53 gene was fabricated based on heated gold disk electrode coupling with endonuclease Nt.BstNBI-assisted target recycle amplification and alkaline phosphatase (ALP)-based electrocatalytic signal amplification. For biosensor assembling, biotinylated ssDNA capture probes were first immobilized on heated Au disk electrode (HAuDE), then combined with streptavidin-alkaline phosphatase (SA-ALP) by biotin-SA interaction. ALP could catalyze the hydrolysis of ascorbic acid 2-phosphate (AAP) to produce ascorbic acid (AA). While AA could induce the redox cycling to generate electrocatalytic oxidation current in the presence of ferrocene methanol (FcM). When capture probes hybridized with p53, Nt.BstNBI would recognize and cleave the duplexes and p53 was released for recycling. Meanwhile, the biotin group dropt from the electrode surface and subsequently SA-ALP could not adhere to the electrode. The signal difference before and after cleavage was proportional to the p53 gene concentration. Furthermore, with electrode temperature elevated, the Nt.BstNBI and ALP activities could be increased, greatly improving the sensitivity and efficiency for p53 detection. A detection limit of 9.5 × 10-17 M could be obtained (S/N = 3) with an electrode temperature of 40 °C, ca. four magnitudes lower than that at 25 °C.
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Affiliation(s)
- Zhen-Zhen Mi
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Hao-Cheng Hu
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Jian-Jun Sun
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Shao-Hua Wu
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China.
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Lin CZ, Jiang LF, Zhang GY, Zhou FS, Wu SH, Cao J, Deng QH. Enantioselective synthesis of 3a-azido-pyrroloindolines by copper-catalyzed asymmetric dearomative azidation of tryptamines. Chem Commun (Camb) 2023. [PMID: 37272849 DOI: 10.1039/d3cc01438j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Copper-catalyzed asymmetric dearomative azidation of tryptamines using azidobenziodoxolone as an azidating reagent was developed, which affords a variety of 3a-azido-pyrroloindolines in good to high enantioselectivities under mild reaction conditions. The azides could be readily transformed into the corresponding 3a-amino-pyrroloindolines via reduction and 1,2,3-triazole derivatives via a click reaction.
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Affiliation(s)
- Cheng-Zhou Lin
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, P. R. China.
| | - Ling-Feng Jiang
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, P. R. China.
| | - Guang-Yi Zhang
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, P. R. China.
| | - Fang-Shuai Zhou
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, P. R. China.
| | - Shao-Hua Wu
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, P. R. China.
| | - Jing Cao
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, P. R. China.
| | - Qing-Hai Deng
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, P. R. China.
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Qiu LF, Zhu JX, Pan Y, Dang YX, Wu SH. [Distribution Characteristics, Ecological Risks, and Source Identification of Heavy Metals in Cultivated Land Under Non-grain Production]. Huan Jing Ke Xue 2023; 44:2829-2837. [PMID: 37177954 DOI: 10.13227/j.hjkx.202206190] [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: 05/15/2023]
Abstract
The purpose of this study was to explore the distribution characteristics and potential ecological risks of soil heavy metal pollution of cultivated land under non-grain production. Taking a typical area around Hangzhou Bay as an example, 254 topsoil samples (0-20 cm) of cultivated land were collected, and the content of eight soil heavy metals in four different cultivated land use types, including grain, seedlings, vegetables, and fruits, was analyzed. The ecological risk was assessed by the Nemerow pollution index and the potential ecological risk index, and the PMF model was used to identify the source of soil heavy metals in the study area. The results showed that the average contents of As, Cr, Cd, Cu, Hg, Ni, and Zn were all higher than the soil background value, except for Pb, but were lower than the national risk control standard for soil contamination of agricultural land. Non-grain production had a significant impact on the accumulation of heavy metals in soil. The content of heavy metals in nurseries and orchards was relatively high, followed by vegetable fields, and the lowest in grain fields. The Nemerow index showed that the cultivated land in the study area was in a light pollution level as a whole, and the single-factor pollution risks of Hg, Cd, and As were relatively high. The potential ecological risk levels of heavy metals in different cultivated land use types were:nurseries>orchards>vegetable fields>grain fields. The PMF results showed that the main sources of soil heavy metals in the study area were mixed sources of industrial emissions (36.8%), natural parent material sources (28.4%), atmospheric deposition sources (21.4%), and agricultural activity sources (13.4%). In conclusion, the increase in the application of chemical fertilizers and pesticides was the direct reason for the increase in soil heavy metal content caused by non-grain production of the cultivated land, whereas the industrial and mining emissions and atmospheric deposition accelerated the increase in soil heavy metal content in the study area.
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Affiliation(s)
- Le-Feng Qiu
- Institute of Land and Urban-Rural Development, Zhejiang University of Finance & Economics, Hangzhou 310018, China
- Zhejiang Institute of "Eight-Eight" Strategies, Hangzhou 310018, China
| | - Jin-Xia Zhu
- Institute of Land and Urban-Rural Development, Zhejiang University of Finance & Economics, Hangzhou 310018, China
- Zhejiang Institute of "Eight-Eight" Strategies, Hangzhou 310018, China
| | - Yi Pan
- Institute of Land and Urban-Rural Development, Zhejiang University of Finance & Economics, Hangzhou 310018, China
- Zhejiang Institute of "Eight-Eight" Strategies, Hangzhou 310018, China
| | - Yun-Xiao Dang
- Institute of Land and Urban-Rural Development, Zhejiang University of Finance & Economics, Hangzhou 310018, China
- Zhejiang Institute of "Eight-Eight" Strategies, Hangzhou 310018, China
| | - Shao-Hua Wu
- Institute of Land and Urban-Rural Development, Zhejiang University of Finance & Economics, Hangzhou 310018, China
- Zhejiang Institute of "Eight-Eight" Strategies, Hangzhou 310018, China
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Chuang YC, Chang YC, Tsai MT, Yang TW, Huang MT, Wu SH, Wang C. Electrospinning of Aqueous Solutions of Atactic Poly( N-isopropylacrylamide) with Physical Gelation. Gels 2022; 8:gels8110716. [PMID: 36354624 PMCID: PMC9689489 DOI: 10.3390/gels8110716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 10/27/2022] [Accepted: 11/01/2022] [Indexed: 11/09/2022] Open
Abstract
The phase diagram of a given polymer solution is used to determine the solution’s electrospinnability. We constructed a phase diagram of an aqueous solution of atactic poly(N-isopropylacrylamide) (a-PNIPAM) based on turbidity measurements and the rheological properties derived from linear viscoelasticity. Several important transition temperatures were obtained and discussed, including the onset temperature for concentration fluctuations T1, gel temperature Tgel, and binodal temperature Tb. On heating from 15 °C, the one-phase a-PNIPAM solution underwent pronounced concentration fluctuations at temperatures above T1. At higher temperatures, the thermal concentration fluctuations subsequently triggered the physical gelation process to develop a macroscopic-scale gel network at Tgel before the phase separation at Tb. Thus, the temperature sequence for the transition is: T1 < Tgel < Tb~31 °C for a given a-PNIPAM aqueous solution. Based on the phase diagram, a low-temperature electrospinning process was designed to successfully obtain uniform a-PNIPAM nanofibers by controlling the solution temperature below T1. In addition, the electrospinning of an a-PNIPAM hydrogel at Tgel < T < Tb was found to be feasible considering that the elastic modulus of the gel was shown to be very low (ca. 10−20 Pa); however, at the jet end, jet whipping was not seen, though the spitting out of the internal structures was observed with high-speed video. In this case, not only dried nanofibers but also some by-products were produced. At T > Tb, electrospinning became problematic for the phase-separated gel because the enhanced gel elasticity dramatically resisted the stretching forces induced by the electric field.
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Liu SS, Huang R, Zhang SP, Xu TC, Hu K, Wu SH. Antimicrobial secondary metabolites from an endophytic fungus Aspergillus polyporicola. Fitoterapia 2022; 162:105297. [PMID: 36096278 DOI: 10.1016/j.fitote.2022.105297] [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: 07/08/2022] [Revised: 09/02/2022] [Accepted: 09/03/2022] [Indexed: 11/19/2022]
Abstract
Two new nucleoside derivatives, kipukasins O (1) and P (2), one new cyclohexenone derivative, arthropsadiol D (5), and one new natural product, (+)-2,5-dimethyl-3(2H)-benzofuranone (6), together with eleven known compounds (3, 4, 7-15), were obtained from the culture broth of the endophytic fungus Aspergillus polyporicola R2 isolated from the roots of Synsepalum dulcificum. Among them, the absolute configuration of compound 5 was determined by quantum chemical calculations of NMR chemical shifts and ECD spectrum. The antimicrobial activities of these compounds were evaluated. Compound 11 exhibited obvious inhibitory activity against MRSA, Staphylococcus aureus, Salmonella typhimurium, Botrytis cinerea, and Fusarium graminearum with MIC values of 4, 4, 4, 32, and 16 μg/mL, respectively. Compound 12 exhibited antibacterial activity against S. typhimurium and MRSA with MIC values of 4 and 16 μg/mL. Compound 6 exhibited antifungal activity against F. graminearum with MIC value of 32 μg/mL.
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Affiliation(s)
- Si-Si Liu
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, and Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming 650091, China
| | - Rong Huang
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Shou-Peng Zhang
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, and Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming 650091, China
| | - Tang-Chang Xu
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, and Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming 650091, China
| | - Kun Hu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming 650201, China
| | - Shao-Hua Wu
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, and Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming 650091, China.
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Ling WJ, Rong WF, Wu SH, Guo GH, Chen J, Liu YM. [Research and development of an air sampling tube for chlorobenzene compounds and its supporting determination method]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2022; 40:613-619. [PMID: 36052594 DOI: 10.3760/cma.j.cn121094-20210607-00279] [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] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To establish a GDH-3 air sample tube for simultaneous determination of twelve kinds of chlorobenzene compounds (CBs) in workplace air by gas chromatography. And to established a matching determination method. Methods: In October 2020, the vapor and aerosol CBs in workplace air were collected by GDH-3 air sampling tube, and desorption and elution with 3.00 ml toluene for 15 min, then the solution separated by DB-23 capillary column, and finally detected with microcell electron capture detector. Results: The quantitative determination ranges of twelve isomers of CBs were 0.71×10(-3)-2000.00 mg/L, with the correlative coefficients were 0.99967-0.99998. The minimum detectable concentrations were 0.04-112.63 μg/m(3), and the minimum quantification concentrations were 0.14-375.42 μg/m(3) (15.00 L sample, 3.00 ml sample solution) . The average elution efficiencies were 96.00%-104.00%. The within-run relative standard deviations (RSDs) were 2.54%-6.12%, and the between-run RSDs were 3.85%-7.87%. Sealed samples could be stable at room temperature for at least 15 days. Conclusion: GDH-3 air sample tube can be used for simultaneous determination of twelve kinds of CBs in workplace air by gas chromatography. The established supporting measurement method meets the measurement requirements of the occupational health standard detection method, and the it's suitable for the simultaneous determination of 12 kinds of CBS in the air.
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Affiliation(s)
- W J Ling
- Guangzhou Twelfth People's Hospital (Guangzhou Occupational Disease Prevention and Treatment Hospital) Occupational Health Assessment and Monitoring Center, Guangzhou 510620, China
| | - W F Rong
- Guangdong Province Hospital for Occupational Disease Prevention and Treatment Poison Control Station, Guangzhou 510300, China
| | - S H Wu
- Guangzhou Twelfth People's Hospital (Guangzhou Occupational Disease Prevention and Treatment Hospital) Occupational Health Assessment and Monitoring Center, Guangzhou 510620, China
| | - G H Guo
- Guangzhou Twelfth People's Hospital (Guangzhou Occupational Disease Prevention and Treatment Hospital) Occupational Health Assessment and Monitoring Center, Guangzhou 510620, China
| | - J Chen
- Guangzhou Twelfth People's Hospital (Guangzhou Occupational Disease Prevention and Treatment Hospital) Occupational Health Assessment and Monitoring Center, Guangzhou 510620, China
| | - Y M Liu
- Guangzhou Twelfth People's Hospital (Guangzhou Occupational Disease Prevention and Treatment Hospital) Occupational Health Assessment and Monitoring Center, Guangzhou 510620, China
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Huang XH, Wu SH, Li P, Ke Q, Weng XT, Li L, Liu DX, Zhuang SW, Sun JH, Guo WH. [Percutaneous biliary stent combined with brachytherapy for malignant obstructive jaundice: a multicenter retrospective controlled study]. Zhonghua Gan Zang Bing Za Zhi 2022; 30:702-709. [PMID: 36038338 DOI: 10.3760/cma.j.cn501113-20220728-00399] [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] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To investigate the efficacy, safety and prognostic factors of percutaneous biliary stent combined with iodine-125 seed chain brachytherapy (radiotherapy) in the treatment of malignant obstructive jaundice. Methods: Data of 107 cases with malignant obstructive jaundice treated with percutaneous biliary stent implantation from January 2017 to December 2020 were retrospectively analyzed. Among them, 58 cases received biliary stent combined with iodne-125 seed chain brachytherapy (study group), and 49 cases received biliary stent implantation (control group). The changes of bilirubin, stent patency time, complications, overall survival (OS) and prognostic factors were analyzed in both groups. Results: The incidence of complications in the study group and the control group were 17.2% and 18.3% respectively, and the difference was not statistically significant (P=0.974). Serum total bilirubin levels were decreased significantly in both groups at one month after surgery (P<0.001). Postoperative stent patency time was significantly better in the study group (10.0±1.6 months) (95% CI: 8.2~12.5) than that in the control group (5.2±0.4 months) (95% CI: 4.1~6.0, P<0.001). The median OS was longer in the study group (11.2±1.8 months) (95% CI: 9.2~12.8) than that in the control group (8.0±1.1 months) (95% CI: 8.0~12.8, P<0.001). Multivariate analysis result showed that stent combined with brachytherapy (HR=0.08, 95% CI:0.04~0.15, P<0.001) and receiving further anti-tumor therapy after surgery (HR=0.27, 95% CI:0.15~0.49, P<0.001) were independent risk factors affecting the patency of biliary stents. Preoperative percutaneous transhepatic biliary drainage (HR=0.46, 95%CI:0.28~0.74, P=0.002), stent combined with brachytherapy (HR=0.23, 95%CI:0.14~0.39, P<0.001) and receiving further anti-tumor therapy after surgery (HR=0.37, 95%CI:0.22~0.61, P<0.001) were independent risk factors affecting OS. Conclusion: Percutaneous biliary stent combined with brachytherapy is safe and effective in the treatment of malignant obstructive jaundice, which can significantly prolong the patency time of biliary stent and the survival time of patients.
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Affiliation(s)
- X H Huang
- Department of Interventional Radiology, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou 350025,China
| | - S H Wu
- Department of Interventional Radiology, Zhangzhou Municipal Hospital, Zhangzhou 350025, China
| | - P Li
- Department of Radiology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou 350025, China
| | - Q Ke
- Department of Interventional Radiology, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou 350025,China
| | - X T Weng
- Department of Interventional Radiology, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou 350025,China
| | - L Li
- Department of Interventional Radiology, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou 350025,China
| | - D X Liu
- Department of Radiology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou 350025, China
| | - S W Zhuang
- Department of Interventional Radiology, Zhangzhou Municipal Hospital, Zhangzhou 350025, China
| | - J H Sun
- Hepatobiliary and Pancreatic Interventional Treatment Center, Division of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, China
| | - W H Guo
- Department of Interventional Radiology, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou 350025,China
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Wang JF, Huang R, Song ZQ, Yang QR, Li XP, Liu SS, Wu SH. Polyhydroxylated sesquiterpenes and ergostane glycosides produced by the endophytic fungus Xylaria sp. from Azadirachta indica. Phytochemistry 2022; 199:113188. [PMID: 35421432 DOI: 10.1016/j.phytochem.2022.113188] [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] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 04/02/2022] [Accepted: 04/03/2022] [Indexed: 06/14/2023]
Abstract
The investigation of the metabolites from the endophytic fungus Xylaria sp. YM 311647 in solid fermentation resulted in the isolation of six undescribed compounds, namely xylarioxides A-F, respectively. These included one eremophilane sesquiterpene, three guaiane sesquiterpene glycosides, and two ergostane glycosides. The structures of the compounds were determined by extensive analyses of spectroscopic data, including 1D and 2D NMR, as well as HRESIMS data. The stereochemistry of xylarioxide A was confirmed by X-ray crystallographic analysis. All of the isolated compounds were assayed for their antifungal activities against seven phytopathogenic fungi and two human pathogenic fungi. Among them, xylarioxides A, E and F showed potent activities against the tested phytopathogens. Particularly, xylarioxide E exhibited the highest activity against Gibberella saubinetii, Curvularia lunata, and Colletotrichum gloeosporioides with MIC values of 4, 4, and 8 μg/mL, respectively, which were comparable to the positive control of nystatin. Interestingly, guaiane sesquiterpene glycosides have been rarely reported from fungal sources. Additionally, xylarioxide E represented an unusual naturally occurring 3,4-seco-steroidal glycoside with a seven-membered lactone in ring A.
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Affiliation(s)
- Jun-Fei Wang
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming, 650091, China
| | - Rong Huang
- School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China
| | - Zhi-Qiang Song
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming, 650091, China
| | - Qing-Rong Yang
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming, 650091, China
| | - Xin-Peng Li
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming, 650091, China
| | - Si-Si Liu
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming, 650091, China
| | - Shao-Hua Wu
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming, 650091, China.
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11
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Huang HC, Zhong CL, Li WP, Mo JH, Wu SH, Zhang BP, Xi XJ. [A case report of gastric adenocarcinoma of fundic gland type as suspected gastric neuroendocrine tumor]. Zhonghua Nei Ke Za Zhi 2022; 61:685-687. [PMID: 35673751 DOI: 10.3760/cma.j.cn112138-20210714-00482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Affiliation(s)
- H C Huang
- The Second Clinical School, Guangzhou University of Chinese Medicine, Guangzhou 510405,China
| | - C L Zhong
- Department of Spleen and Stomach Diseases, Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510120,China
| | - W P Li
- Department of Pathology, Guangdong Provincial Hospital of Traditional Chinese Medicine, Guangzhou 510120, China
| | - J H Mo
- The Second Clinical School, Guangzhou University of Chinese Medicine, Guangzhou 510405,China
| | - S H Wu
- The Second Clinical School, Guangzhou University of Chinese Medicine, Guangzhou 510405,China
| | - B P Zhang
- Department of Spleen and Stomach Diseases, Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510120,China
| | - X J Xi
- Department of Spleen and Stomach Diseases, Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510120,China
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12
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Hu HC, Wu SH, Jin LX, Sun JJ. Plasmonic Au nanocube enhanced SERS biosensor based on heated electrode and strand displacement amplification for highly sensitive detection of Dam methyltransferase activity. Biosens Bioelectron 2022; 210:114283. [PMID: 35447396 DOI: 10.1016/j.bios.2022.114283] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 04/03/2022] [Accepted: 04/10/2022] [Indexed: 11/26/2022]
Abstract
In this work, a novel "turn-on" mode Au nanocubes (AuNCs) enhanced surface-enhanced Raman scattering (SERS) biosensing platform coupled with heated Au electrode (HAuE) and strand displacement amplification (SDA) strategy was proposed for highly sensitive detection of DNA adenine methylation (Dam) Methyltransferase (MTase) activity. The Dam MTase and DpnI enzyme activities were significantly increased by elevating the HAuE surface temperature, resulting in the rapid production of template DNA for later SDA. During the SDA process, the released single-stranded DNA (ssDNA) could be amplified exponentially, and its concentration was positively related to the Dam MTase activity. The plasmonic AuNCs in SERS tags could provide significant SERS enhancement due to their "lightning rod" effect resulting from the sharp feature of the edges and corners of AuNCs. Because of these factors, the proposed biosensors exhibited high sensitivity in detecting the Dam MTase activity. The limit of detection was estimated to be 8.65 × 10-5 U mL-1, which was lower than that in most of the sensors for detection of Dam MTase activity in the literature. This SERS biosensor could also be used to screen inhibitors of Dam MTase and had the potential for detecting Dam MTase activity in real biological samples.
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Affiliation(s)
- Hao-Cheng Hu
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Shao-Hua Wu
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China.
| | - Lei-Xin Jin
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Jian-Jun Sun
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
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13
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Wang JF, Huang R, Liu SS, Wu SH. Antimicrobial Cytochalasan Alkaloids from an Endophytic Fungus Chaetomium globosum. Chem Nat Compd 2021. [DOI: 10.1007/s10600-021-03579-5] [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]
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14
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Shen ZY, Mei QY, Liu Y, Zheng LC, Li CC, Liu JJ, Xiao YN, Wu SH, Zhang B. A Non-isocyanate Route to Poly(ester urethane) with High Molecular Weight: Synthesis and Effect of Chemical Structures of Polyester-diol. Chin J Polym Sci 2021. [DOI: 10.1007/s10118-021-2645-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Han YB, Bai W, Ding CX, Liang J, Wu SH, Tan RX. Intertwined Biosynthesis of Skyrin and Rugulosin A Underlies the Formation of Cage-Structured Bisanthraquinones. J Am Chem Soc 2021; 143:14218-14226. [PMID: 34432466 DOI: 10.1021/jacs.1c05421] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Skyrin and rugulosin A are bioactive bisanthraquinones found in many fungi, with the former suggested as a precursor of hypericin (a diversely bioactive phytochemical) and the latter characterized by its distinct cage-like structure. However, their biosynthetic pathways remain mysterious, although they have been characterized for over six decades. Here, we present the rug gene cluster that governs simultaneously the biosynthesis of skyrin and rugulosin A in Talaromyces sp. YE3016, a fungal endophyte residing in Aconitum carmichaeli. A combination of genome sequencing, gene inactivation, heterologous expression, and biotransformation tests allowed the identification of the gene function, biosynthetic precursor, and enzymatic sets involved in their molecular architecture constructions. In particular, skyrin was demonstrated to form from the 5,5'-dimerization of emodin radicals catalyzed by RugG, a cytochrome P450 monooxygenase evidenced to be potentially applicable for the (chemo)enzymatic synthesis of dimeric polyphenols. The fungal aldo-keto reductase RugH was shown to be capable of hijacking the closest skyrin precursor (CSP) immediately after the emodin radical coupling, catalyzing the ketone reduction of CSP to inactivate its tautomerization into skyrin and thus allowing for the spontaneous intramolecular Michael addition to cyclize the ketone-reduced form of CSP into rugulosin A, a representative of diverse cage-structured bisanthraquinones. Collectively, the work updates our understanding of bisanthraquinone biosynthesis and paves the way for synthetic biology accesses to skyrin, rugulosin A, and their siblings.
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Affiliation(s)
- Yun Bin Han
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Wei Bai
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China.,State Key Laboratory of Pharmaceutical Biotechnology, Institute of Functional Biomolecules, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Chun Xia Ding
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Jie Liang
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Shao-Hua Wu
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, and Key Laboratory for Southwest Microbial Diversity of the Ministry of Education, School of Life Sciences, Yunnan Institute of Microbiology, Yunnan University, Kunming 650091, China
| | - Ren Xiang Tan
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China.,State Key Laboratory of Pharmaceutical Biotechnology, Institute of Functional Biomolecules, School of Life Sciences, Nanjing University, Nanjing 210023, China
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16
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Xu QM, Fang F, Wu SH, Shi ZQ, Liu Z, Zhoa YJ, Zheng HW, Lu GX, Kong HR, Wang GJ, Ai L, Chen MX, Chen JX. Dendritic cell TLR4 induces Th1-type immune response against Cryptosporidium parvum infection. Trop Biomed 2021; 38:172-179. [PMID: 33797542 DOI: 10.47665/tb.38.1.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The objective of this study was to investigate the mechanism of Toll-like receptor (TLR4)- mediated dendritic cell (DC) immune against Cryptosporidium parvum infection. C. parvum sporozoites were labeled with 5,6-carboxyfluorescein diacetate succinimidyl ester. Murine bone marrow-derived DCs were isolated, and divided into TLR4 antibody blocking (TAB; infected with 2 × 105 labeled sporozoites and 0.5 μg TLR4 blocking antibody), TLR4 antibody unblocking (TAU; infected with 2 × 105 labeled sporozoites), and blank control (BC; with 1.5 mL Roswell Park Memorial Institute 1640 medium) groups. The adhesion of Cryptosporidium sporozoites to DCs and CD11c+ levels were examined by fluorescence microscopy and flow cytometry. Male KM mice were orally injected with C. parvum. The proliferation of T lymphocytes in spleen, expression of cytokines in peripheral blood, and TLR4 distribution features in different organs were further determined by immunohistochemistry. A significantly higher expression of CD11c+ and higher C. parvum sporozoite adhesion were found in the TAU group compared with other groups. The expression of CD4+CD8- /CD8+CD4- in the spleen were obviously differences between the TAB and TAU groups. The expression of TLR4, interleukin IL-4, IL-12, IL-18 and IFN-γ improved in the TAU group compared with TAB group. Higher expression of TLR4 was detected in the lymph nodes of mice in the TAU group, with pathological changes in the small intestine. Hence, TLR4 could mediate DCs to recognize C. parvum, inducing Th1 immune reaction to control C. parvum infection.
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Affiliation(s)
- Q M Xu
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, Anhui Province, 230036, PR China
| | - F Fang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, Anhui Province, 230036, PR China
| | - S H Wu
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, Anhui Province, 230036, PR China
| | - Z Q Shi
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, Anhui Province, 230036, PR China
| | - Z Liu
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, Anhui Province, 230036, PR China
| | - Y J Zhoa
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, Anhui Province, 230036, PR China
| | - H W Zheng
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, Anhui Province, 230036, PR China
| | - G X Lu
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, Anhui Province, 230036, PR China
| | - H R Kong
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, Anhui Province, 230036, PR China
| | - G J Wang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, Anhui Province, 230036, PR China
| | - L Ai
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, Anhui Province, 230036, PR China.,National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, National Center for Tropical Diseases Research, WHO Collaborating Center for Tropical Diseases, Key Laboratory of Parasite and Vector Biology, National Health and Family Planning Commission, Shanghai 200025, PR China
| | - M X Chen
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, Anhui Province, 230036, PR China.,National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, National Center for Tropical Diseases Research, WHO Collaborating Center for Tropical Diseases, Key Laboratory of Parasite and Vector Biology, National Health and Family Planning Commission, Shanghai 200025, PR China.,Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, PR China
| | - J X Chen
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, National Center for Tropical Diseases Research, WHO Collaborating Center for Tropical Diseases, Key Laboratory of Parasite and Vector Biology, National Health and Family Planning Commission, Shanghai 200025, PR China.,National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention-Shenzhen Center for Disease Control and Prevention Joint Laboratory for Imported Tropical Disease Control, Shanghai, 200025, PR China
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17
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Huang XL, Wu SH, Shi PF, Xu LH, Chen C, Xie YP, Gao DQ, Chen K, Tan JF, Liu LR, Xu Y, Yang F, Yu MX, Wang SY, Qian SX. [Active screening of intestinal carbapenem-resistant Enterobacteriaceae in high-risk patients admitted to the hematology wards and its effect evaluation]. Zhonghua Xue Ye Xue Za Zhi 2021; 41:932-936. [PMID: 33333697 PMCID: PMC7767815 DOI: 10.3760/cma.j.issn.0253-2727.2020.11.009] [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] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
目的 观察血液科肠道碳青霉烯类耐药的肠杆菌科细菌(CRE)主动筛查患者CRE定植、感染的特征,并评价主动筛查结合加强干预在血液科患者CRE感染预防控制中的效果。 方法 以2017年3月至2019年12月血液内科接受化疗或免疫抑制治疗且预期会出现粒细胞缺乏(粒缺)的患者为研究对象,进行至少3个时间点(治疗前、治疗后粒缺期、粒缺伴发热期)的肠道CRE筛查,以2016年12月至2017年2月血液内科未开展肠道CRE主动筛查的、接受化疗或免疫抑制治疗的115例患者为历史对照组,两组患者均进行CRE感染实时监测,CRE筛查阳性者均采取接触隔离措施,CRE筛查阳性者出现发热或者感染症状时启动针对CRE联合抗生素治疗。 结果 主动筛查患者CRE定植率为16.46%(66/401);病种分布上,以急性白血病定植率最高,为23.03%(26/113)。66例筛查阳性患者中,其中第1次筛查阳性患者为27例,占40.9%(27/66),第2次筛查阳性患者为15例,占22.7%(15/66),第3次及以后筛查阳性患者为24例,占36.4%(24/66)。CRE定植病原菌中耐碳青霉烯类肺炎克雷伯菌(CRKP)最多,占54.55%(36/66)。主动筛查患者CRE感染率(2.49%)及死亡率(50.00%)低于历史对照组的11.30%及69.23%;干预期间10例CRE血流感染患者病原菌种类与前期主动筛查病原菌完全相同,符合率为100.0%。 结论 血液科病房急性白血病患者CRE定植率最高,CRKP是CRE定植、感染的主要病原菌,提高筛查频率可以显著提高筛查阳性率,采取主动筛查并及早干预能有效降低血液科患者CRE发生率及死亡率,CRE筛查阳性病原菌与后续CRE感染病原菌符合率高。恶性血液病患者肠道CRE筛查可以对后期CRE血流感染起到预警以及优化抗菌药物使用的作用。
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Affiliation(s)
- X L Huang
- Department of Hematology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine Hangzhou, Zhejiang 310006, China
| | - S H Wu
- Department of Microbiology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine Hangzhou, Zhejiang 310006, China
| | - P F Shi
- Department of Hematology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine Hangzhou, Zhejiang 310006, China
| | - L H Xu
- Department of Microbiology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine Hangzhou, Zhejiang 310006, China
| | - C Chen
- Department of Hematology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine Hangzhou, Zhejiang 310006, China
| | - Y P Xie
- Department of Hematology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine Hangzhou, Zhejiang 310006, China
| | - D Q Gao
- Department of Hematology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine Hangzhou, Zhejiang 310006, China
| | - K Chen
- Department of Hematology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine Hangzhou, Zhejiang 310006, China
| | - J F Tan
- Department of Hematology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine Hangzhou, Zhejiang 310006, China
| | - L R Liu
- Department of Hematology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine Hangzhou, Zhejiang 310006, China
| | - Y Xu
- Department of Hematology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine Hangzhou, Zhejiang 310006, China
| | - F Yang
- Department of Hematology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine Hangzhou, Zhejiang 310006, China
| | - M X Yu
- Department of Hematology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine Hangzhou, Zhejiang 310006, China
| | - S Y Wang
- Department of Hospital Infection Prevention and Control, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine Hangzhou, Zhejiang 310006, China
| | - S X Qian
- Department of Hematology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine Hangzhou, Zhejiang 310006, China
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Xu TC, Lu YH, Wang JF, Song ZQ, Hou YG, Liu SS, Liu CS, Wu SH. Bioactive Secondary Metabolites of the Genus Diaporthe and Anamorph Phomopsis from Terrestrial and Marine Habitats and Endophytes: 2010-2019. Microorganisms 2021; 9:217. [PMID: 33494367 PMCID: PMC7912663 DOI: 10.3390/microorganisms9020217] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/17/2021] [Accepted: 01/18/2021] [Indexed: 02/07/2023] Open
Abstract
The genus Diaporthe and its anamorph Phomopsis are distributed worldwide in many ecosystems. They are regarded as potential sources for producing diverse bioactive metabolites. Most species are attributed to plant pathogens, non-pathogenic endophytes, or saprobes in terrestrial host plants. They colonize in the early parasitic tissue of plants, provide a variety of nutrients in the cycle of parasitism and saprophytism, and participate in the basic metabolic process of plants. In the past ten years, many studies have been focused on the discovery of new species and biological secondary metabolites from this genus. In this review, we summarize a total of 335 bioactive secondary metabolites isolated from 26 known species and various unidentified species of Diaporthe and Phomopsis during 2010-2019. Overall, there are 106 bioactive compounds derived from Diaporthe and 246 from Phomopsis, while 17 compounds are found in both of them. They are classified into polyketides, terpenoids, steroids, macrolides, ten-membered lactones, alkaloids, flavonoids, and fatty acids. Polyketides constitute the main chemical population, accounting for 64%. Meanwhile, their bioactivities mainly involve cytotoxic, antifungal, antibacterial, antiviral, antioxidant, anti-inflammatory, anti-algae, phytotoxic, and enzyme inhibitory activities. Diaporthe and Phomopsis exhibit their potent talents in the discovery of small molecules for drug candidates.
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Affiliation(s)
| | | | | | | | | | | | | | - Shao-Hua Wu
- Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming 650091, China; (T.-C.X.); (Y.-H.L.); (J.-F.W.); (Z.-Q.S.); (Y.-G.H.); (S.-S.L.); (C.-S.L.)
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19
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Yan DD, Yu HY, Bao YQ, Wu SH, Liu F. [X-linked congenital adrenal dysplasia with hypogonadotropic hypogonadism: a case report]. Zhonghua Nei Ke Za Zhi 2020; 59:905-908. [PMID: 33120497 DOI: 10.3760/cma.j.cn112138-20191226-00841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Affiliation(s)
- D D Yan
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated 6th People's Hospital, Shanghai Clinical Center for Diabetes, Shanghai Diabetes Institute, Shanghai 200233, China
| | - H Y Yu
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated 6th People's Hospital, Shanghai Clinical Center for Diabetes, Shanghai Diabetes Institute, Shanghai 200233, China
| | - Y Q Bao
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated 6th People's Hospital, Shanghai Clinical Center for Diabetes, Shanghai Diabetes Institute, Shanghai 200233, China
| | - S H Wu
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated 6th People's Hospital, Shanghai Clinical Center for Diabetes, Shanghai Diabetes Institute, Shanghai 200233, China
| | - F Liu
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated 6th People's Hospital, Shanghai Clinical Center for Diabetes, Shanghai Diabetes Institute, Shanghai 200233, China
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20
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Huang XB, Wu SH, Hu HC, Sun JJ. AuNanostar@4-MBA@Au Core-Shell Nanostructure Coupled with Exonuclease III-Assisted Cycling Amplification for Ultrasensitive SERS Detection of Ochratoxin A. ACS Sens 2020; 5:2636-2643. [PMID: 32786384 DOI: 10.1021/acssensors.0c01162] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The "turn-on" mode surface-enhanced Raman scattering (SERS) aptasensor for ultrasensitive ochratoxin A (OTA) detection was developed based on the SERS "hot spots" of AuNanostar@4-MBA@Au core-shell nanostructures (AuNS@4-MBA@Au) and exonuclease III (Exo III)-assisted target cycle amplification strategy. Compared with conventional gold nanoparticles, AuNS@4-MBA@Au provides a much higher SERS enhancement factor because AuNS exhibits a larger surface roughness and the lightning rod effect, as well as an excellent electromagnetic field between the AuNS core and the Au shell, which contribute to the superstrong SERS signal. Meanwhile, Exo III-assisted target cycle amplification can be used as an effective method for the further amplified detection of OTA. Additionally, the utilization of streptavidin magnesphere paramagnetic particles offers a green, economical, and facile technology for the accumulation and separation of the signal probe AuNS@4-MBA@Au from solution. All these factors lead to a significant enhancement of detectable signals and superhigh sensitivity. As a result, the limit of detection as low as 0.25 fg mL-1 could be achieved, which was lower than that in the other reported literatures on SERS methods for OTA detection as we know. The developed SERS aptasensor also provides a promising tool for foodstuff detection.
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Affiliation(s)
- Xiao-Bin Huang
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Shao-Hua Wu
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Hao-Cheng Hu
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Jian-Jun Sun
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
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Guo XN, Wu SH, Zhu KX. Effect of superheated steam treatment on quality characteristics of whole wheat flour and storage stability of semi-dried whole wheat noodle. Food Chem 2020; 322:126738. [DOI: 10.1016/j.foodchem.2020.126738] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 03/14/2020] [Accepted: 04/01/2020] [Indexed: 12/27/2022]
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Zhao YF, Feng XB, Zhang JY, Lu Y, Wu SH, Wang YQ, Wu K, Liu G, Sun J. Tailoring phase transformation strengthening and plasticity of nanostructured high entropy alloys. Nanoscale 2020; 12:14135-14149. [PMID: 32597912 DOI: 10.1039/d0nr02483j] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Metastable high entropy alloys (HEAs) have attracted extensive attention due to their excellent combination of high strength and great plasticity. In this work, we utilize constraining effects to tailor phase transformation strengthening and plasticity of nanostructured HEA ([double bond, length as m-dash]FeCoCrNi) thin films prepared by the magnetron sputtering technique via HEA/Cu and HEA/Ni nanotwinned nanolaminates (NTNLs). It is uncovered that the HEA/Cu NTNLs without phase transformation exhibit the fashion of "smaller is stronger" and HEA layers become more favorable to detwin at a smaller layer thickness (h). By contrast, the HEA/Ni NTNLs manifest an ultra-high peak hardness plateau accompanied by the FCC-to-HCP phase transformation in HEA layers at large h≥ 25 nm, whereas they manifest size-dependent hardness when detwinning occurs at smaller h. This unusual plastic deformation behavior of HEA/X (X = Cu, Ni) NTNLs was rationalized by partial-based mechanisms. These findings open a new avenue to achieve superior mechanical properties of HEAs particularly at the nanoscale.
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Affiliation(s)
- Y F Zhao
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
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Abstract
Objective: This study aimed to explore the prognostic factors for primary gastric diffuse large B-cell lymphoma (PG-DLBCL). Materials and Methods: This retrospective study analyzed 72 PG-DLBCL patients between January 2012 and December 2017 in the Shanxi Cancer Hospital of Shanxi Medical University to identify the different prognostic factors in PG-DLBCL. The clinical features, treatment, and follow-up information were analyzed. Results: The low CD4:CD8 ratio group (median subsequent overall survival [OS]: 36.06 months; 95% confidence interval [CI]: 25.73-46.40) showed a significant decrease in subsequent OS compared to the normal group among PG-DLBCL patients who were newly diagnosed and did not receive rituximab (median OS: 52.58 months; 95% CI: 44.18-60.97; p=0.029). Event-free survival status 24 months after the date of diagnosis (EFS24) also decreased significantly in the low CD4:CD8 group (median EFS24: 16.27 months; 95% CI: 13.09-19.45) compared to the normal group (median EFS24: 20.34 months; 95% CI: 17.05-23.63; p=0.014). Multivariate analysis showed that low CD4:CD8 at diagnosis was an independent poor prognostic factor for subsequent OS and EFS24. Conclusion: Our data suggest that identifying prognostic factors, especially host immunity, may provide useful information for assessing prognosis or clinical management.
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Affiliation(s)
- ZhiMin Bai
- Shanxi Medical University, Taiyuan, Shanxi, China
| | - ZhenHua Li
- Department of Hematology, Shanxi Tumor Hospital affiliated to Shanxi Medical University, Taiyuan, Shanxi, China
| | - Tao Guan
- Department of Hematology, Shanxi Tumor Hospital affiliated to Shanxi Medical University, Taiyuan, Shanxi, China
| | - LieYang Wang
- Department of Hematology, Shanxi Tumor Hospital affiliated to Shanxi Medical University, Taiyuan, Shanxi, China
| | - JingRong Wang
- Department of Hematology, Shanxi Tumor Hospital affiliated to Shanxi Medical University, Taiyuan, Shanxi, China
| | - ShaoHua Wu
- Department of Hematology, Shanxi Tumor Hospital affiliated to Shanxi Medical University, Taiyuan, Shanxi, China
| | - LiPing Su
- Department of Hematology, Shanxi Tumor Hospital affiliated to Shanxi Medical University, Taiyuan, Shanxi, China
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Wen FF, Li XY, Li YY, He S, Xu XY, Liu YH, Liu L, Wu SH. Expression of Raptor and Rictor and their relationships with angiogenesis in colorectal cancer. Neoplasma 2020; 67:501-508. [PMID: 32039630 DOI: 10.4149/neo_2020_190705n597] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 09/04/2019] [Indexed: 11/08/2022]
Abstract
Mammalian target of rapamycin (mTOR) has two subtypes, i.e., mTORC1 and mTORC2, which contain the Raptor and Rictor core molecules, respectively. The effect of Raptor and Rictor on hypoxia inducible factor (HIF)-1α, HIF-2α, and vascular endothelial growth factor (VEGF) in colorectal cancer (CRC) is unclear. In this work, we investigated the correlations among Raptor, Rictor, HIF-1α, HIF-2α, and VEGF expression in CRC. We subsequently analyzed the clinicopathological features of patients. Immunohistochemistry, western blot, and RT-PCR analyses were performed to detect the expression of Raptor, Rictor, HIF-1α, HIF-2α, and VEGF in 120 cases of CRC and 60 cases of normal colorectal mucosa. CD34 was used to label microvascular density (MVD), which was found to be higher in patients with positive Raptor or Rictor than in those with negative Raptor or Rictor. The positive rates of Raptor, Rictor, HIF-1α, HIF-2α, and VEGF in CRC were significantly higher than in normal colorectal mucosa. Raptor expression was positively correlated with HIF-1α and VEGF but not with HIF-2α expression. By contrast, Rictor expression was positively correlated with HIF-2α and VEGF but not with HIF-1α expression. Survival analysis further indicated that Raptor, Rictor, HIF-1α, HIF-2α, VEGF and lymph node metastasis were independent prognostic factors in CRC. To conclude, Raptor and Rictor expression was related to the initiation and development of CRC and angiogenesis in different ways. The combined detection of Raptor and Rictor is important for patients with colorectal carcinoma in prognosis and optimal therapy.
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Affiliation(s)
- F F Wen
- Department of Pathology, Binzhou Medical University, Binzhou, China
| | - X Y Li
- Department of Pathology, Binzhou Medical University, Binzhou, China
| | - Y Y Li
- Department of Pathology, Binzhou Medical University, Binzhou, China
| | - S He
- Department of Pathology, Binzhou Medical University, Binzhou, China
| | - X Y Xu
- Department of Pathology, Binzhou Medical University, Binzhou, China
| | - Y H Liu
- Department of Pathology, Binzhou Medical University, Binzhou, China
| | - L Liu
- Department of Pathology, Binzhou Medical University, Binzhou, China
| | - S H Wu
- Department of Pathology, Binzhou Medical University, Binzhou, China
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Zhao LC, Fan FL, Wang Y, Chen ZN, Sun JJ, Fang YM, Wu SH. Self-Reference Analysis Based on Temperature Difference Absorption Spectra. Anal Chem 2019; 91:15791-15797. [DOI: 10.1021/acs.analchem.9b04091] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Liu-Chuang Zhao
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Fei-Long Fan
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Yi Wang
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Zhen-Ni Chen
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Jian-Jun Sun
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Yi-Min Fang
- Key Laboratory of Cardiovascular & Cerebrovascular Medicine, School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211166, China
| | - Shao-Hua Wu
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
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Wu SH, Huang XB, Tang Y, Ma LM, Liu Y, Sun JJ. Temperature controllable electrochemical sensors based on horseradish peroxidase as electrocatalyst at heated Au disk electrode and its preliminary application for H 2O 2 detection. Anal Chim Acta 2019; 1096:44-52. [PMID: 31883590 DOI: 10.1016/j.aca.2019.10.052] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [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: 07/10/2019] [Revised: 10/19/2019] [Accepted: 10/22/2019] [Indexed: 01/08/2023]
Abstract
In this paper, horseradish peroxidase (HRP) was successfully immobilized on heated Au disk electrode (HAuDE) by biotin-streptavidin specific interaction through HS-ssDNA-biotin self-assembled on HAuDE for investigation the electrocatalytic activity of HRP. With elevated electrode temperature, the significant temperature effect of the electrocatalytic activity of HRP for H2O2 reduction was demonstrated by using this bio-sensing platform. With an electrode temperature of 40 °C, a detection limit of 1.5 × 10-6 mol L-1 for H2O2 reduction could be obtained, which was more than one magnitude lower than that with an electrode temperature of 0 °C. Because HRP can be widely used as an enzyme label for amplification detection, this sensing platform can be broadly applied to analytical chemistry such as nucleic acid detection, and aptamer-based biosensors.
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Affiliation(s)
- Shao-Hua Wu
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350116, China.
| | - Xiao-Bin Huang
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350116, China
| | - You Tang
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350116, China
| | - Li-Min Ma
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350116, China
| | - Yan Liu
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350116, China
| | - Jian-Jun Sun
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350116, China
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Zhu XH, Peng HS, Jiang YL, Wu SH, Tang SY, Liu YH. [Construction of mouse CCR3 gene RNAi lentivirus vector and its expression on mast cells]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 33:628-634. [PMID: 31327201 DOI: 10.13201/j.issn.1001-1781.2019.07.013] [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] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Indexed: 11/12/2022]
Abstract
Objective:The aim of this study is to screen the targeting chemokine receptor 3-RNA interference (CCR3-RNAi) lentiviral expression vector, infect mouse mast cells,observe the expression of this gene in mast cells and the interference efficiency of the virus vector.The pathogenesis of allergic rhinitis lays the foundation.Method:Three pairs of CCR3-shRNA sequences were constructed,and three pairs of double-stranded shRNA oligo were inserted into shRNA lentiviral vectors to construct three shRNA lentiviral recombinant plasmids.The recombinant vector and virus-packed auxiliary plasmids were co-transfected into 293T cells to obtain lentiviral plasmids.The lentiviral plasmids were then transfected into mouse bone marrow-derived mast cells in vitro and purified. The expression level of CCR3 mRNA in mast cells was verified by qRT-PCR,and the expression level of CCR3 protein in mast cells was detected by Western Blot.Result: It was confirmed by sequencing that the lentiviral vector of CCR3 shRNA was successfully constructed, transfected into 293T cells and packaged with virus. Finally the high purity PDSO19-PL-CCR3 lentiviral plasmid was obtained with a virus titer of 3.7×10⁸TU/ml.The lentiviral plasmid was used to infect mouse mast cells.RT-PCR and Western Blot detection assay showed that CCR3shRNA reduced the expression of CCR3 gene in mouse mast cells at the level of mRNA and protein.Conclusion: The CCR3 gene RNAi lentivirus expression vector was successfully constructed.It was found that it downregulated the expression level of CCR3 gene mRNA and protein in mouse mast cells,which laid the foundation for further research on its role in the pathogenesis of allergic rhinitis.
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Affiliation(s)
- X H Zhu
- Department of Otorhinolaryngology Head and Neck Surgery, Second Affiliated Hospital of Nanchang University, Nanchang, 330006, China
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Abstract
Electrically heated electrodes have been applied for various chemical and biological sensors. However, previous electrically heated electrodes, including microwires and microdiscs, are usually small and often suffer from the requirement of frequent calibrations of the electrode surface temperature ( Ts) at different environment temperatures. Here, we fabricate a temperature-controllable disk electrode (TCDE) with a conventional size (3-5 mm in diameter). A one-parameter temperature calibration is proposed using a temperature transfer coefficient α and a structural model ( Ts = Te + α ( Th - Te)) to estimate Ts ( Th and Te are the temperature of the heating element and environment, respectively). The value of α is unique for a TCDE and mainly dependent on the structure and materials of the electrodes and the solution in nature. Once α is experimentally determined, Ts can be calibrated and found to be applicable to wide fluctuations in room temperature (15.0-33.0 °C) with errors below 1.5% for three types of disk electrodes (gold, glassy carbon, and platinum). The required Ts can be obtained by just setting Th without thermal characterization between the heating power and Ts. A simple relationship for exploring the dependence of α on the height ( H) and radius ( R) of the electrode materials and other constants ( a, b, c, and R0), α = 1 - c - aH - b ( R - R0)2, is revealed by numerical simulations (COMSOL). The impact of the radii of both the insulating materials of the electrode and the electrochemical cells on Ts is also considered. The effect of the solution thermal conductivity on α is studied. TCDEs are expected to be used as a sensor platform with enhanced performance.
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Affiliation(s)
- Sen Yang
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Xing Chen
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Zhen-Zhen Mi
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Zhi-Min Chen
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Xiao-Dong Li
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Jian-Jun Sun
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Shao-Hua Wu
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
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Zheng KX, Jiang Y, Jiang JX, Huang R, He J, Wu SH. A new phthalazinone derivative and a new isoflavonoid glycoside from lichen-associated Amycolatopsis sp. Fitoterapia 2019; 135:85-89. [DOI: 10.1016/j.fitote.2019.04.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 04/23/2019] [Accepted: 04/23/2019] [Indexed: 02/02/2023]
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Liu XC, Wu SH, Wang WY, Hao Q, Guo ZD, Wang WZ. [Regulatory effect of exosomes secreted by vaginal wall fibroblasts on angiogenesis in patients with stress urinary incontinence]. Zhonghua Yi Xue Za Zhi 2019; 99:510-514. [PMID: 30786348 DOI: 10.3760/cma.j.issn.0376-2491.2019.07.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: Exosomes are considered to mediate intercellular communication by delivering biomolecules like mRNA, miRNA into recipient cells. The purpose of this study was to evaluate the effects of exosomes secreted by fibroblasts from women with stress urinary incontinence (SUI-EXO) on endothelial cells angiogenesis. Methods: Primary fibroblasts were acquired from periurethral vaginal wall tissues and exosomes were prepared by ultracentrifugation of fibroblasts cells conditioned medium. The expression levels of pro-angiogenic and anti-angiogenic genes were assessed using qRT-PCR analysis. Migration of endothelial cells was measured by transwell assay, and the effects of SUI-EXO on angiogenesis were evaluated by performing a tube formation assay in vitro. Results: SUI-EXO was successfully isolated from fibroblasts cells conditional medium and transferred to endothelial cells efficiently. When the endothelial cells were treated with SUI-EXO, the expression levels of pro-angiogenic genes in fibroblasts were downregulated, and the expression levels of anti-angiogenic genes were upregulated significantly (P<0.01). Endothelial cells exhibited a decreased migratory capacity after treatment with SUI-EXO compared to exosomes from health women (64.6±8.7 vs 114.5±14.2,P<0.01), and tube formation of endothelial cells was also significantly inhibited in the SUI-EXO treated group as determined by the increase of the tube length (87.6±13.3 vs 168.5±28.3,P<0.01). Conclusion: This study suggests that SUI-EXO plays related roles in regulating endothelial cells angiogenesis and SUI-EXO maybe involve in the pathogenesis of SUI.
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Affiliation(s)
- X C Liu
- Department of Obstetrics & Gynecology, Shanxi Academy of Medical Sciences & Shanxi Da Yi Hospital, Shanxi Da Yi Hospital Affiliated to Shanxi Medical University, Taiyuan 030032, China
| | - S H Wu
- Department of Obstetrics & Gynecology, Shanxi Academy of Medical Sciences & Shanxi Da Yi Hospital, Shanxi Da Yi Hospital Affiliated to Shanxi Medical University, Taiyuan 030032, China
| | - W Y Wang
- Department of Obstetrics & Gynecology, Second Affiliated Hospital of Anhui Medical University, Hefei 230601, China
| | - Q Hao
- Department of Obstetrics & Gynecology, Shanxi Academy of Medical Sciences & Shanxi Da Yi Hospital, Shanxi Da Yi Hospital Affiliated to Shanxi Medical University, Taiyuan 030032, China
| | - Z D Guo
- Department of Obstetrics & Gynecology, Shanxi Academy of Medical Sciences & Shanxi Da Yi Hospital, Shanxi Da Yi Hospital Affiliated to Shanxi Medical University, Taiyuan 030032, China
| | - W Z Wang
- Department of Obstetrics & Gynecology, Shanxi Academy of Medical Sciences & Shanxi Da Yi Hospital, Shanxi Da Yi Hospital Affiliated to Shanxi Medical University, Taiyuan 030032, China
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Zhang J, Hong LC, Wang XB, Wei YZ, Hu G, Wu SH, Cheng JQ. [A study on the burden and causes of hospitalization and deaths in Shenzhen, between 1995 and 2014]. Zhonghua Liu Xing Bing Xue Za Zhi 2019; 39:1309-1313. [PMID: 30453428 DOI: 10.3760/cma.j.issn.0254-6450.2018.10.004] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: Data from the surveillance program was collected, to analyze the situation of hospitalization and cases of death with recorded causes, in Shenzhen, from 1995 to 2014. Situation of hospitalization and causes of deaths were studied in Shenzhen which had been a fast-developing city with growing number of immigrants so as to provide reference for decision-making on related prevention and control strategies. Methods: Data on hospitalizations and deaths collected from the surveillance program, were classified by both International Classification of Diseases (ICD)- 9 and ICD-10. A database was constructed with methods on related descriptive and trend analysis. Results: Around 6.3 million inpatients were seen in the past two decades in Shenzhen. The top five diseases for hospitalization were pregnancy childbirth and puerperium complications, respiratory diseases, injury and poisoning, digestive system diseases and circulatory system diseases, that accounting for 68.4% of all the hospitalization burden. The number of inpatients increased annually, with an 11 times increase during the past two decades. Proportions for pregnancy childbirth and puerperium complications, circulatory system diseases and urinary system diseases all showed increasing (χ(2)=53 806.94, 6 893.95 and 15 383.14, P<0.01), while proportions for injuries and poisoning, respiratory diseases, digestive system diseases showed a declining trend (χ(2)=131 480.09,1 711.84 and 11 367.66, P<0.01). Number of cumulative inpatient deaths exceeded 60 000, with the top five causes as malignant tumor, circulatory system diseases, injury and poisoning, respiratory system diseases and digestive system diseases, that accounting for 82.28% of all the inpatient deaths. Deaths due to circulatory system diseases, injury and poisoning increased and then decreased. Malignant tumor and respiratory diseases-induced deaths showed an increasing trend (χ(2)=1 546.48, 309.55, P<0.01), while induced deaths from disease of the other systems showed slight changes. The overall case fatality rate showed an annual decline (χ(2)=4 378.63, P<0.01), from 2.23% in 1995 to 0.74% in 2014, with mortality attribute to tumor, circulatory system disease decreased significantly. Conclusions: Shenzhen had been under an ageing transition, with relatively young population living in the city. Chronic diseases such as tumor gradually had become the major causes for heavy hospitalization burden on the population of Shenzhen.
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Affiliation(s)
- J Zhang
- School of Public Health, Southern Medical University, Guangzhou 510515, China
| | - L C Hong
- School of Public Health, Southern Medical University, Guangzhou 510515, China
| | - X B Wang
- School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China
| | - Y Z Wei
- School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China
| | - G Hu
- School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China
| | - S H Wu
- School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China
| | - J Q Cheng
- Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China
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Wu SH, Zhu XH. [Research on the effect of RNA interference on mast cells in respiratory allergic diseases]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 31:1697-1700. [PMID: 29798133 DOI: 10.13201/j.issn.1001-1781.2017.21.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Indexed: 11/12/2022]
Abstract
Respiratory allergic disease has become a major health problem in the 21st century.Mast cells are key effector cells of the respiratory anaphylaxis, and can form a variety of features of allergic inflammation by producting large numbers of inflammatory mediators.RNAi can affect the disease process by silencing gene expression, and has made significant process in the study of many diseases, but the research of targeting mast cells for the treatment of respiratory allergic diseases is rare.This review focuses on recent advances of the application of RNA interference on mast cell in respiratory allergic diseases, aming to further understand its application in the respiratory allergic diseases and research status, and broaden new ideas of treating respiratory allergies.
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Krishnan A, Wu SH, Povinelli M. Tunable size selectivity and nanoparticle immobilization on a photonic crystal optical trap. Opt Lett 2018; 43:5399-5402. [PMID: 30383017 DOI: 10.1364/ol.43.005399] [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] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 10/07/2018] [Indexed: 06/08/2023]
Abstract
We harness residual thermal effects in a low-absorptivity system to manipulate parallel optical trapping of particles on the nanoscale. A photonic crystal is used to generate a 2D array of optical traps. We show that the size selectivity of the trap can be tuned by adding a non-ionic surfactant to the solution, altering the thermophoretic effect that delivers nanoparticles to trapping sites. We further show that particles can be permanently immobilized on the photonic crystal via photopolymerization of the trapping medium.
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Yang Y, Liu YH, Cheng Q, Cheng Z, Wu SH, Ding D, Xu SC. [Application of MDCT and post-processing in children with tracheal foreign body]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 31:1492-1495. [PMID: 29798101 DOI: 10.13201/j.issn.1001-1781.2017.19.007] [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] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Indexed: 11/12/2022]
Abstract
Objective:To explore the clinical value of MDCT and post-processing in children with suspected foreign body in trachea.Method:Two hundred patients with suspected tracheal foreign body were treated with 64-slice spiral CT (MDCT) and simulated endoscopic imaging,then compared with seen in bronchoscopy; Compare the results of MDCT and post-processing with the coincidence of intraoperative findings.Result:One hundred and eighty-four cases of positive children were examined by MDCT postprocessing technique and bronchoscopy,179 cases were obstructed by exogenous foreign body,5 cases were phlegm thrombosis (endogenous foreign body) obstruction; 16 cases of children with no foreign body diagnosed by MDCT post-processing technique were also examined by bronchoscopy. The results showed that there was a foreign body in 1 case,and the foreign body was located in the pharyngeal cleft (watermelon spermoderm),and the remaining 15 cases had no foreign body. MDCT and post-treatment techniques for children with tracheal foreign body diagnosis of 99.4% sensitivity,specificity of 75%.There was no significant difference in the detection rate of foreign body between the two techniques of MDCT and post-processing technique and bronchoscopy (P>0.05). Examed by MDCT and postprocessing,we can understand the specific location and size of foreign body,nature,shape preoperatively.Conclusion:Although MDCT and post-processing techniques can not be used to treat tracheal foreign bodies,but the diagnostic rate of bronchial foreign bodies is comparable to that of bronchoscopy. We could apply MDCT examination and post processing before the bronchoscopy,for foreign body inhalation history is not clear,or suspected airway foreign body. We can improve the level of diagnosis and treatment through guiding the operation of bronchoscopy focus.
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Affiliation(s)
- Y Yang
- Department of Otolaryngology Head and Neck Surgery,the First Affiliated Hospital of Medical University of Anhui,Hefei,230022,China
| | - Y H Liu
- Department of Otolaryngology Head and Neck Surgery,the First Affiliated Hospital of Medical University of Anhui,Hefei,230022,China
| | - Q Cheng
- Department of Otorhinolaryngology,Children's Hospital of Anhui Province
| | - Z Cheng
- Department of Otorhinolaryngology,Children's Hospital of Anhui Province
| | - S H Wu
- Department of Otorhinolaryngology,Children's Hospital of Anhui Province
| | - D Ding
- Department of Otorhinolaryngology,Children's Hospital of Anhui Province
| | - S C Xu
- Department of Otorhinolaryngology,Children's Hospital of Anhui Province
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Li X, Lan SM, Zhu ZP, Zhang C, Zeng GM, Liu YG, Cao WC, Song B, Yang H, Wang SF, Wu SH. The bioenergetics mechanisms and applications of sulfate-reducing bacteria in remediation of pollutants in drainage: A review. Ecotoxicol Environ Saf 2018; 158:162-170. [PMID: 29684746 DOI: 10.1016/j.ecoenv.2018.04.025] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [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: 12/29/2017] [Revised: 03/30/2018] [Accepted: 04/12/2018] [Indexed: 06/08/2023]
Abstract
Sulfate-reducing bacteria (SRB), a group of anaerobic prokaryotes, can use sulfur species as a terminal electron acceptor for the oxidation of organic compounds. They not only have significant ecological functions, but also play an important role in bioremediation of contaminated sites. Although numerous studies on metabolism and applications of SRB have been conducted, they still remain incompletely understood and even controversial. Fully understanding the metabolism of SRB paves the way for allowing the microorganisms to provide more beneficial services in bioremediation. Here we review progress in bioenergetics mechanisms and application of SRB including: (1) electron acceptors and donors for SRB; (2) pathway for sulfate reduction; (3) electron transfer in sulfate reduction; (4) application of SRB for economical and concomitant treatment of heavy metal, organic contaminants and sulfates. Moreover, current knowledge gaps and further research needs are identified.
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Affiliation(s)
- Xin Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Shi-Ming Lan
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Zhong-Ping Zhu
- School of Minerals processing and Bioengineering, Central South University, No. 932 South Lushan road, Changsha, Hunan 410083, PR China
| | - Chang Zhang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Guang-Ming Zeng
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Yun-Guo Liu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Wei-Cheng Cao
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Biao Song
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Hong Yang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Sheng-Fan Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Shao-Hua Wu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
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Jiang YL, Peng HS, Wu SH, Xie XH, Zhu XH, Liu YH. [Pharyngeal space carcinoma ex pleomorphic adenoma:a case report]. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 32:710-712. [PMID: 29771093 DOI: 10.13201/j.issn.1001-1781.2018.09.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Indexed: 06/08/2023]
Abstract
Carcinoma ex pleomorphic adenoma is an epithelial malignant tumor of pleomorphic adenoma. This may be due to the accumulation of genetic instability caused by long-term pleomorphic adenomas. There are few reports of parapharyngeal space carcinoma ex pleomorphic adenoma in the literature study both at home and abroad. This article retrospectively summarized the clinical data of 1 case of pharyngeal space carcinoma ex pleomorphic adenoma and reviewed the literature. We strengthened the understanding of parapharyngeal space carcinoma ex pleomorphic adenoma, improve the accuracy of diagnosis and reduce misdiagnosis and mistreatment.
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Wu SH, Zhang B, Wang FF, Mi ZZ, Sun JJ. Heating enhanced sensitive and selective electrochemical detection of Hg 2+ based on T-Hg 2+ -T structure and exonuclease III-assisted target recycling amplification strategy at heated gold disk electrode. Biosens Bioelectron 2018; 104:145-151. [DOI: 10.1016/j.bios.2018.01.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 12/15/2017] [Accepted: 01/03/2018] [Indexed: 10/18/2022]
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Huang R, Jiang BG, Li XN, Wang YT, Liu SS, Zheng KX, He J, Wu SH. Polyoxygenated Cyclohexenoids with Promising α-Glycosidase Inhibitory Activity Produced by Phomopsis sp. YE3250, an Endophytic Fungus Derived from Paeonia delavayi. J Agric Food Chem 2018; 66:1140-1146. [PMID: 29334729 DOI: 10.1021/acs.jafc.7b04998] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Seven new polyoxygenated cyclohexenoids, namely, phomopoxides A-G (1-7), were isolated from the fermentation broth extract of an endophytic fungal strain Phomopsis sp. YE3250 from the medicinal plant Paeonia delavayi Franch. The structures of these compounds were established by spectroscopic interpretation. The absolute configurations of compounds 1 and 4 were confirmed by X-ray crystallographic analysis and chemical derivative approach. All isolated compounds showed weak cytotoxic activities toward three human tumor cell lines (Hela, MCF-7, and NCI-H460) and weak antifungal activities against five pathogenic fungi (Candida albicans, Aspergillus niger, Pyricularia oryzae, Fusarium avenaceum, and Hormodendrum compactum). In addition, compounds 1-7 showed a promising α-glycosidase inhibitory activity with IC50 values of 1.47, 1.55, 1.83, 2.76, 2.88, 3.16, and 2.94 mM, respectively, as compared with a positive control of acarbose (IC50 = 1.22 mM).
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Affiliation(s)
- Rong Huang
- School of Chemical Science and Technology, Yunnan University , Kunming 650091, China
| | - Bo-Guang Jiang
- Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan Institute of Microbiology, Yunnan University , Kunming 650091, China
| | - Xiao-Nian Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201, China
| | - Ya-Ting Wang
- Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan Institute of Microbiology, Yunnan University , Kunming 650091, China
| | - Si-Si Liu
- Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan Institute of Microbiology, Yunnan University , Kunming 650091, China
| | - Kai-Xuan Zheng
- Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan Institute of Microbiology, Yunnan University , Kunming 650091, China
| | - Jian He
- Group of Peptides and Natural Products Research, School of Pharmaceutical Sciences, Southern Medical University , Guangzhou 510515, China
| | - Shao-Hua Wu
- Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan Institute of Microbiology, Yunnan University , Kunming 650091, China
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Zhu XH, Wang JL, Huang QL, Jiang YL, Peng HS, Wu SH, Liu YH. [Effect of CCR3 gene knockout on eosinophils in mice]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 31:1913-1918. [PMID: 29798315 DOI: 10.13201/j.issn.1001-1781.2017.24.011] [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] [Received: 10/18/2017] [Indexed: 11/12/2022]
Abstract
Objective:To investigate the effect of CCR3 gene knockout on the proliferation, maturation and apoptosis of eosinophils (EOS) in mice. Method:Bone marrow cells from CCR3 gene knockout mice (experimental group) and wild-type mice (control group) were cultured in vitro and induced differentiation into mature EOS. EOS proliferation was observed by cell counting.Expression of degranulation protein mRNA was detected by qRT-PCR. EOS apoptosis was detected by Annexin V-FITC/PI double staining method. Result:①The number of cells on the 0-14 day of EOS cultured in vitro showed that the number of cells in the experimental group was less than that in the control group at tenth, twelfth, fourteenth days, and the proliferation was slower, the difference was statistically significant (P<0.01). ②The test results of EOS cells apoptosis showed that, under the condition of containing 10 ng/ml IL-5 or no IL-5, the apoptosis rate of EOS cells in experimental group was higher than that in normal control group, the difference between both groups was statistically significant (P<0.01). ③The expression results of ECP, EPO, MBP mRNA in EOS showed that the expression levels of ECP, EPO, MBP mRNA in the experimental group compared with the normal control group were reduced in varying degrees, the difference between both groups was statistically significant (P<0.05). Conclusion:Knockout CCR3 gene can inhibit the proliferation and maturation of EOS and promote its apoptosis, which provides a theoretical basis for CCR3 as a target gene to treat allergic rhinitis.
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Affiliation(s)
- X H Zhu
- Department of Otorhinolaryngology Head and Neck Surgery, Second Affiliated Hospital of Nanchang University, Nanchang, 330006, China
| | - J L Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Second Affiliated Hospital of Nanchang University, Nanchang, 330006, China
| | - Q L Huang
- Department of Otorhinolaryngology Head and Neck Surgery, Second Affiliated Hospital of Nanchang University, Nanchang, 330006, China
| | - Y L Jiang
- Department of Otorhinolaryngology Head and Neck Surgery, Second Affiliated Hospital of Nanchang University, Nanchang, 330006, China
| | - H S Peng
- Department of Otorhinolaryngology Head and Neck Surgery, Second Affiliated Hospital of Nanchang University, Nanchang, 330006, China
| | - S H Wu
- Department of Otorhinolaryngology Head and Neck Surgery, Second Affiliated Hospital of Nanchang University, Nanchang, 330006, China
| | - Y H Liu
- Department of Otorhinolaryngology Head and Neck Surgery, Second Affiliated Hospital of Nanchang University, Nanchang, 330006, China
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Zhao LC, Guo MH, Li XD, Huang YP, Wu SH, Sun JJ. Molar Range Detection Based on Sideband Differential Absorption Spectroscopy with a Concentrated Reference. Anal Chem 2017; 89:13429-13433. [DOI: 10.1021/acs.analchem.7b03722] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Liu-Chuang Zhao
- Ministry of Education Key
Laboratory for Analytical Science of Food Safety and Biology, Fujian
Provincial Key Laboratory of Analysis and Detection Technology for
Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Mei-Hong Guo
- Ministry of Education Key
Laboratory for Analytical Science of Food Safety and Biology, Fujian
Provincial Key Laboratory of Analysis and Detection Technology for
Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Xiao-Dong Li
- Ministry of Education Key
Laboratory for Analytical Science of Food Safety and Biology, Fujian
Provincial Key Laboratory of Analysis and Detection Technology for
Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Yu-Ping Huang
- Ministry of Education Key
Laboratory for Analytical Science of Food Safety and Biology, Fujian
Provincial Key Laboratory of Analysis and Detection Technology for
Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Shao-Hua Wu
- Ministry of Education Key
Laboratory for Analytical Science of Food Safety and Biology, Fujian
Provincial Key Laboratory of Analysis and Detection Technology for
Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Jian-Jun Sun
- Ministry of Education Key
Laboratory for Analytical Science of Food Safety and Biology, Fujian
Provincial Key Laboratory of Analysis and Detection Technology for
Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
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Feng B, Shang J, Wu SH, Chen H, Han Y, Li YQ, Zhang DZ, Zhao LF, Wei SF, Mao Q, Yin CB, Han T, Wang MR, Chen SJ, Li J, Xie Q, Zhen Z, Gao ZL, Zhang YX, Gong GZ, Yang DL, Pan C, Sheng JF, Tang H, Ning Q, Shi GF, Niu JQ, Luo GH, Sun YT, You H, Wang GQ, Zhang LL, Peng J, Zhang Q, Liu JJ, Chen CW, Chen XY, Zhao W, Wang RH, Sun L, Wei L. [Efficacy and safety of pegylated interferon α-2b injection (Y shape, 40 kD) in treatment of patients with genotype 1/6 chronic hepatitis C]. Zhonghua Gan Zang Bing Za Zhi 2017; 25:187-194. [PMID: 28482405 DOI: 10.3760/cma.j.issn.1007-3418.2017.03.006] [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: 02/05/2023]
Abstract
Objective: To investigate the efficacy and safety of the new investigational drug pegylated interferon α-2b (Peg-IFN-α-2b) (Y shape, 40 kD) injection (180 µg/week) combined with ribavirin in the treatment of patients with genotype 1/6 chronic hepatitis C (CHC), with standard-dose Peg-IFN-α-2a combined with ribavirin as a positive control. Methods: A multicenter, randomized, open-label, and positive-controlled phase III clinical trial was performed. Eligible patients with genotype 1/6 CHC were screened out and randomly divided into Peg-IFN-α-2b(Y shape, 40kD) group and Peg-IFN-α-2a group at a ratio of 2:1. The patients in both groups were given oral ribavirin for 48 weeks in addition and then followed up for 24 weeks after drug withdrawal. Abbott Real Time HCV Genotype II was used to determine HCV genotype, and Cobas TaqMan quantitative real-time PCR was used to measure HCV RNA level at 0, 4, 12, 24, 48, and 72 weeks. Adverse events were recorded in detail. The primary efficacy endpoint was sustained virological response (SVR), and a non-inferiority test was also performed. Results: A total of 561 patients with genotype 1/6 CHC were enrolled, among whom 529 received treatment; 90.9% of these patients had genotype 1 CHC. The data of the full analysis set showed that SVR rate was 69.80% (95% CI 65.00%-74.60%) in the trial group and 74.16% (95% CI 67.73%-80.59%) in the control group (P = 0.297 0). The data of the per protocol set (PPS) showed that SVR rate was 80.63% (95% CI 76.04%-85.23%) in the trial group and 81.33% (95% CI 75.10%-87.57%) in the control group (P = 0.849 8), and the 95% CI of rate difference conformed to the non-inferiority standard. The analysis of the PPS population showed that of all subjects, 47.9% achieved rapid virologic response, with a positive predictive value of 93.8%. The incidence rate of adverse events was 96.30% in the trial group and 94.94% in the control group, and the incidence rate of serious adverse events was 5.13% in the trail group and 5.06% in the control group. Conclusion: In the regimen of Peg-IFN-α combined with ribavirin for the treatment of genotype 1/6 CHC, the new investigational drug Peg-IFN-α-2b(Y shape, 40 kD) has comparable clinical effect and safety to the control drug Peg-IFN-α-2a.
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Affiliation(s)
- B Feng
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing 100044, China
| | - J Shang
- Department of Infectious Diseases, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - S H Wu
- Department of Infectious Diseases, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - H Chen
- Department of Infectious Diseases, The First Affiliated Hospital of Lanzhou University, Lanzhou 730000, China
| | - Y Han
- Department of Gastroenterology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Y Q Li
- Department of Infectious Diseases, 302 Military Hospital, Beijing 100039, China
| | - D Z Zhang
- Department of Infectious Diseases, Institute for Viral Hepatitis, Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - L F Zhao
- Department of Infectious Diseases, The First Affiliated Hospital of Shanxi University, Taiyuan 030001, China
| | - S F Wei
- Department of Infectious Diseases, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - Q Mao
- Department of Infectious Disease, Southeast Hospital, Third Military Medical University, Chongqing 400038, China
| | - C B Yin
- Department of Infectious Diseases, Guangzhou Eighth People's Hospital, Guangzhou 510060, China
| | - T Han
- Department of Hepatology, Tianjin Third Central Hospital, Tianjin Medical University, Tianjin 300170, China
| | - M R Wang
- Institute of Liver Disease, Nanjing 81 Hospital, Nanjing 210002, China
| | - S J Chen
- Department of Hepatology, Jinan Infectious Disease Hospital, Jinan 250021, China
| | - J Li
- Department of Infectious Diseases, Jiangsu Provincial People's Hospital, Nanjing 210029, China
| | - Q Xie
- Department of Infectious Diseases, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Z Zhen
- Department of Infectious Diseases, The Third Affiliated Hospital of Hebei Medical University, Shijiazhuang 050051, China
| | - Z L Gao
- Department of Infectious Diseases, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510630, China
| | - Y X Zhang
- Department of Infectious Diseases, The First Affiliated Hospital of Xinjiang Medical University, Wulumuqi 830054, China
| | - G Z Gong
- Department of Infectious Diseases, The Second Xiangya Hospital of Central South University, Changsha 410011, China
| | - D L Yang
- Department of Infectious Disease, Institute of Infectious Disease, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - C Pan
- Department of Hepatology, Fuzhou Infectious Disease Hospital, Fuzhou, 350025, China
| | - J F Sheng
- The First Affiliated Hospital of Zhengjiang University, Hangzhou 310003, China
| | - H Tang
- Department of Infectious Diseases, Sichuan University West China Hospital, Chengdu 610041, China
| | - Q Ning
- Department of Infectious Disease, Institute of Infectious Disease, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - G F Shi
- Department of Infectious Diseases, Huashan Hospital, Shanghai 200040, China
| | - J Q Niu
- Department of Infectious Diseases, The First Affiliated Hospital of Jilin University, Changchun 130062, China
| | - G H Luo
- Department of Infectious Diseases, The First Affiliated Hospital of Guangxi Medical Universtiy, Nanning 530021, China
| | - Y T Sun
- Department of Infectious Diseases, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China
| | - H You
- Liver Research Center, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - G Q Wang
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034, China
| | - L L Zhang
- Department of Infectious Diseases, The First Affiliated Hospital of Nanchang University, Nanchang 360102, China
| | - J Peng
- Department of Infectious Diseases, Nangfang Hospital, Southern Medical University, Guangzhou 510510, China
| | - Q Zhang
- Shanghai Public Health Clinical Center, Fudan University, Shanghai 201508, China
| | - J J Liu
- Department of Infectious Diseases, The First Affiliated Hospital of Xiamen University, Xiamen 361003, China
| | - C W Chen
- Nanjing Military Command Liver Disease Research Center, Shanghai 200000, China
| | - X Y Chen
- Hepatology Department, Youan Hospital, Capital Medical University, Beijing 100069, China
| | - W Zhao
- Department of Hepatology, The Second Affiliated Hospital of the Southeast University, Nanjing 210003, China
| | - R H Wang
- Xiamen Amoytop Biotech Co., Ltd, Xiamen, 361022, China
| | - L Sun
- Xiamen Amoytop Biotech Co., Ltd, Xiamen, 361022, China
| | - L Wei
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing 100044, China
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Jiang M, Yin M, Wu S, Han X, Ji K, Wen M, Lu T. GdmRIII, a TetR Family Transcriptional Regulator, Controls Geldanamycin and Elaiophylin Biosynthesis in Streptomyces autolyticus CGMCC0516. Sci Rep 2017; 7:4803. [PMID: 28684749 PMCID: PMC5500506 DOI: 10.1038/s41598-017-05073-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [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] [Received: 11/07/2016] [Accepted: 05/24/2017] [Indexed: 11/13/2022] Open
Abstract
Geldanamycin and elaiophylin are co-produced in several Streptomyces strains. However, the regulation of their biosynthesis is not fully understood yet. Herein the function of a TetR family regulator GdmRIII, which is located in the biosynthetic gene cluster of geldanamycin, was studied to understand the regulatory mechanism of geldanamycin biosynthesis in Streptomyces autolyticus CGMCC0516. The production of geldanamycin decreased substantially in a ΔgdmRIII mutant and the yield of three compounds which were thought to be geldanamycin congeners greatly increased. Surprisingly, the structural elucidation of these compounds showed that they were elaiophylin and its analogues, which implied that GdmRIII not only played a positive regulatory role in the biosynthesis of geldanamycin, but also played a negative role in elaiophylin biosynthesis. GdmRIII affected the expression of multiple genes in both gene clusters, and directly regulated the expression of gdmM, gdmN, and elaF by binding to the promoter regions of these three genes. A conserved non-palindromic sequence was found among the binding sites of elaF. Our findings suggested that the biosynthetic pathways of geldanamycin and elaiophylin were connected through GdmRIII, which might provide a way for Streptomyces to coordinate the biosynthesis of these compounds for better adapting to environment changes.
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Affiliation(s)
- MingXing Jiang
- Yunnan Institute of Microbiology, Yunnan University, 2 North Cui Hu Road, Kunming, Yunnan, 650091, China
| | - Min Yin
- Yunnan Institute of Microbiology, Yunnan University, 2 North Cui Hu Road, Kunming, Yunnan, 650091, China
| | - ShaoHua Wu
- Yunnan Institute of Microbiology, Yunnan University, 2 North Cui Hu Road, Kunming, Yunnan, 650091, China
| | - XiuLin Han
- Yunnan Institute of Microbiology, Yunnan University, 2 North Cui Hu Road, Kunming, Yunnan, 650091, China
| | - KaiYan Ji
- Yunnan Institute of Microbiology, Yunnan University, 2 North Cui Hu Road, Kunming, Yunnan, 650091, China
| | - MengLiang Wen
- Yunnan Institute of Microbiology, Yunnan University, 2 North Cui Hu Road, Kunming, Yunnan, 650091, China.
| | - Tao Lu
- Yunnan Institute of Microbiology, Yunnan University, 2 North Cui Hu Road, Kunming, Yunnan, 650091, China.
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Zhang CM, Niu QR, Xu LM, Wang LM, Wang D, Wu SH. [Isolation, Identification and Characterization of the Filamentous Microorganisms from Bulking Sludge]. Huan Jing Ke Xue 2017; 38:2477-2485. [PMID: 29965368 DOI: 10.13227/j.hjkx.201610094] [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] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
To illustrate the species and characteristics of filamentous microorganisms in bulking sludge, culture method, microscopic examination and molecular biological analysis were conducted to isolate and identify the filamentous microorganisms existing in bulking sludge collected from municipal wastewater treatment plant. Filamentous microorganisms isolated by Gause's synthetic agar medium and starch agar fell into 18 genera, among which Streptomyces and Microbacterium belong to bacterial phylum Actinobacteria, all other isolates were classified into fungi. Penicillium, Cladosporium, Alternaria, Aspergillus and Trichosporon were the fungi with high occurrence frequency in culture medium. Trichosporon, Streptomyces, Penicillium and Alternaria could grow well at neutral pH or meta-acid condition. High concentration of NaCl could inhibit the growth of Trichosporon and Streptomyces, but had no obvious inhibitory effect on Penicillium and Alternaria. Except of Trichosporon, Streptomyces, Penicillium and Alternaria all could utilize saccharose, starch and cellulose. The increase of carbon source concentration could promote their growth. The results of high throughput sequencing of rDNA-ITS showed that a large number of unidentified fungi existed in bulking sludge.
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Affiliation(s)
- Chong-Miao Zhang
- Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Quan-Rui Niu
- Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Li-Mei Xu
- Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Long-Mei Wang
- Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Dai Wang
- Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Shao-Hua Wu
- Xi'an Water Group Company Limited, Xi'an 710061, China
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Shi YX, Wu SH, Zhou SL, Wang CH, Chen H. [Simulation of the Absorption, Migration and Accumulation Process of Heavy Metal Elements in Soil-crop System]. Huan Jing Ke Xue 2016; 37:3996-4003. [PMID: 29964437 DOI: 10.13227/j.hjkx.2016.10.043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Soil-crop system is an important way that heavy metals harm the ecological environment and human health. To research and understand the process of heavy metal absorption, migration and accumulation in soil-crop system is important for the prevention and control of heavy metal pollution and the health of human beings. In this paper, we established a model for crop uptake of heavy metals to calculate the heavy metals contents of wheat roots, stems, leaves and grains, and we analyzed the accumulation process of heavy metals in roots, stems, leaves and grains in the growth cycle of wheat. The predicted values were compared with the measured values to test the accuracy of the model. The results demonstrated that different parts of wheat had different heavy metal absorption capacity, the absorption of the roots was the strongest, followed by leaves, and the absorption capacity of stems and grains was weak. In addition, the contents of different heavy metals in each part of wheat were also significantly different. The content of Cu was the highest, followed by Ni, while the contents of Pb and Cd were small. In the process of wheat growth, the heavy metal accumulation rate of stem, leaf and grain began to slow down at 90, 60 and 100 days respectively, and the concentration of heavy metals reached the maximum gradually, while the accumulation rate of heavy metals in roots showed a growing trend. We studied the process of absorption, migration and accumulation of heavy metals in soil-crop system by using numerical simulation technology, which can provide scientific basis for preventing the ecological and health risks of heavy metal pollution.
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Affiliation(s)
- Ya-Xing Shi
- School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China
| | - Shao-Hua Wu
- School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China.,Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Sheng-Lu Zhou
- School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China
| | - Chun-Hui Wang
- School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China
| | - Hao Chen
- School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China
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Krishnan A, Huang N, Wu SH, Martínez LJ, Povinelli ML. Enhanced and selective optical trapping in a slot-graphite photonic crystal. Opt Express 2016; 24:23271-23279. [PMID: 27828391 DOI: 10.1364/oe.24.023271] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Applicability of optical trapping tools for nanomanipulation is limited by the available laser power and trap efficiency. We utilized the strong confinement of light in a slot-graphite photonic crystal to develop high-efficiency parallel trapping over a large area. The stiffness is 35 times higher than our previously demonstrated on-chip, near field traps. We demonstrate the ability to trap both dielectric and metallic particles of sub-micron size. We find that the growth kinetics of nanoparticle arrays on the slot-graphite template depends on particle size. This difference is exploited to selectively trap one type of particle out of a binary colloidal mixture, creating an efficient optical sieve. This technique has rich potential for analysis, diagnostics, and enrichment and sorting of microscopic entities.
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Abstract
Nanoparticles in aqueous solution are subject to collisions with solvent molecules, resulting in random, Brownian motion. By breaking the spatiotemporal symmetry of the system, the motion can be rectified. In nature, Brownian ratchets leverage thermal fluctuations to provide directional motion of proteins and enzymes. In man-made systems, Brownian ratchets have been used for nanoparticle sorting and manipulation. Implementations based on optical traps provide a high degree of tunability along with precise spatiotemporal control. Here, we demonstrate an optical Brownian ratchet based on the near-field traps of an asymmetrically patterned photonic crystal. The system yields over 25 times greater trap stiffness than conventional optical tweezers. Our technique opens up new possibilities for particle manipulation in a microfluidic, lab-on-chip environment.
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Affiliation(s)
- Shao-Hua Wu
- Ming Hsieh Department of Electrical Engineering, Viterbi School of Engineering, University of Southern California , Los Angeles, California 90089, United States
| | - Ningfeng Huang
- Ming Hsieh Department of Electrical Engineering, Viterbi School of Engineering, University of Southern California , Los Angeles, California 90089, United States
| | - Eric Jaquay
- Ming Hsieh Department of Electrical Engineering, Viterbi School of Engineering, University of Southern California , Los Angeles, California 90089, United States
| | - Michelle L Povinelli
- Ming Hsieh Department of Electrical Engineering, Viterbi School of Engineering, University of Southern California , Los Angeles, California 90089, United States
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Guo CW, Wu SH, Chen FL, Han ZY, Fu XH, Wan R. Synthesis, crystal structure, and insecticidal evaluation of novel aryl pyrazole compounds containing aminophosphonate moiety. PHOSPHORUS SULFUR 2016. [DOI: 10.1080/10426507.2016.1166365] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Chun-Wei Guo
- Department of Applied Chemistry, College of Chemical and Molecular Engineering, Nanjing Tech University, Nanjing, P. R. China
| | - Shao-Hua Wu
- Department of Applied Chemistry, College of Chemical and Molecular Engineering, Nanjing Tech University, Nanjing, P. R. China
| | - Fu-Li Chen
- Department of Applied Chemistry, College of Chemical and Molecular Engineering, Nanjing Tech University, Nanjing, P. R. China
| | - Zhen-Yu Han
- Department of Applied Chemistry, College of Chemical and Molecular Engineering, Nanjing Tech University, Nanjing, P. R. China
| | - Xiao-Huan Fu
- Department of Applied Chemistry, College of Chemical and Molecular Engineering, Nanjing Tech University, Nanjing, P. R. China
| | - Rong Wan
- Department of Applied Chemistry, College of Chemical and Molecular Engineering, Nanjing Tech University, Nanjing, P. R. China
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Zhang SP, Huang R, Li FF, Wei HX, Fang XW, Xie XS, Lin DG, Wu SH, He J. Antiviral anthraquinones and azaphilones produced by an endophytic fungus Nigrospora sp. from Aconitum carmichaeli. Fitoterapia 2016; 112:85-9. [DOI: 10.1016/j.fitote.2016.05.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Revised: 05/09/2016] [Accepted: 05/23/2016] [Indexed: 12/24/2022]
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Li SM, Wu SH. [Expression and clinical significance of epidermal growth factor receptor,HER2, PI3Kp110α and PI3Kp110β in gastric carcinoma]. Zhonghua Bing Li Xue Za Zhi 2016; 45:407-408. [PMID: 27256050 DOI: 10.3760/cma.j.issn.0529-5807.2016.06.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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Zeng WF, Wu SH, Wang Z, Liu YM. [Current status of occupational health and related countermeasures in Guangzhou, China]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2016; 34:148-150. [PMID: 27014900 DOI: 10.3760/cma.j.issn.1001-9391.2016.02.021] [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 To investigate the current status of occupational health and related countermeasures in Guangzhou, China. METHODS Related data were collected from occupational poisoning accident investigation, diagnosis and identification of occupational diseases, and the occupational disease hazard reporting system, and the statistical data of occupational health in Guangzhou were analyzed retrospectively. RESULTS The number of enterprises reporting for occupational disease hazards in Guangzhou was 20 890, and the total number of workers was 1 457 583. The number of workers exposed to occupational hazards was 284 233, and the cumulative number of workers with occupational diseases was 1 502. There were many risk factors for occupational diseases in enterprises, and there were a large number of workers with occupational diseases, as well as newly diagnosed cases. From 2001 to 2014, the total number of cases of occupational diseases was 958. CONCLUSION The situation for the prevention and control of occupational diseases is grim in Guangzhou. Occupational health supervision and law enforcement should be enhanced, the three-level supervision system should be established and perfected, and the occupational health supervision system with a combination of "prevention, treatment, and protection" should be established and promoted, so as to gradually establish a technical service support system for occupational health.
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Affiliation(s)
- W F Zeng
- The Hospital of Prevention and Treatment for Occupational Diseases, Guangzhou 510620, China
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