A Study on Preparation and Use of Nano Poly Pyrrole and Nano Poly (3,4-Ethylenedioxythiophene) Coated Glassy Carbon Electrode For The Determination of Antihistamine in Pharmaceutical and Urine Sample

Pheniramine maleate (PA), an antihistamine, was determined by Differential Pulse Stripping voltammetry using nano polypyrrole (Ppy) and nano poly(3,4-ethylenedioxythiophene) (PEDOT) modified glassy carbon electrodes. The cyclic voltammetric behavior of pheniramine was studied in aqueous acidic, neutral and alkaline conditions. One well-defined oxidation peak was observed in the cyclic voltammograms at all pHs. The influence of pH, scan rate and concentration revealed irreversible electron transfer and the oxidation was diffusion controlled adsorption. The SEM analysis confirmed good accumulation of PA on the electrode surface. A systematic study of influence of various experimental parameters that affect the stripping voltammetric response was carried out and the maximum peak current conditions were arrived at. Calibration was made under maximum peak current conditions. The range of study was 0.05 to 0.4 μg/mL on Ppy/GCE and 0.025 to 0.4μg/mL on PEDOT/GCE and the lower limit of determination were 0.035μg/mL on Ppy/GCE and 0.016μg/mL on PEDOT/GCE. The suitability of the method for the determination of PA in pharmaceutical preparations and urine samples was also ascertained.

Overoxidized poly(3,4-ethylenedioxythiophene)-gold nanoparticles-graphene-modified electrode for the simultaneous detection of dopamine and uric acid in the presence of ascorbic acid

An innovative,ternary nanocomposite composed of overoxidized poly(3,4-ethylenedioxythiophene)(OPEDOT),gold nanoparticles(Au NPs),and electrochemically reduced graphene oxide(ERGO)was prepared on a glassy carbon electrode(GCE)(OPEDOT-Au NPs-ERGO/GCE)through homogeneous chemical reactions and heterogeneous electrochemical methods.The morphology,composition,and structure of this nanocomposite were characterized by transmission electron microscopy,scanning electron microscopy,X-ray diffraction,and X-ray photoelectron spectroscopy.The electrochemical properties of the OPEDOT-Au NPs-ERGO/GCE were investigated by cyclic voltammetry using potassium ferricyanide and hexaammineruthenium(III)chloride redox probe systems.This modified electrode shows excellent electro-catalytic activity for dopamine(DA)and uric acid(UA)under physiological p H conditions,but inhibits the oxidation of ascorbic acid(AA).Linear voltammetric responses were obtained when DA concentrations of approximately 4.0-100μM and UA concentrations of approximately 20-100μM were used.The detection limits(S/N=3)for DA and UA were 1.0 and 5.0μM,respectively,under physiological conditions and in the presence of 1.0 m M of AA.This developed method was applied to the simultaneous detection of DA and UA in human urine,where satisfactory recoveries from 96.7%to 105.0%were observed.This work demonstrates that the developed OPEDOT-Au NPs-ERGO ternary nanocomposite,with its excellent ion-selectivity and electro-catalytic activity,is a promising candidate for the simultaneous detection of DA and UA in the presence of AA in physiological and pathological studies.

Synthesis and Bio-activities of Poly(3,4-ethylenedioxythiophene)(PEDOT)/Poly(styrene sulfonate)(PSS)/Gelatin Layer on Indium Tin Oxide(ITO)-coated Glass

Poly （3, 4-ethylenedioxythiophene） （PEDOT）, together with its dopes, such as poly （styrene sulfonate） （PSS）, has been acknowledged to have a wide range of biomedical applications as an important conducting polymer. In this study, gelatin can be polymerized into PEDOT/PSS polymers on indium tin oxide （ITO）-coated glass. PEDOT/PSS/gelatin layer on ITO-coated glass significantly decreases electrochemical impedance spectroscopy （EIS） and increases charge delivery capacity relative to the gelatin layer and bare ITO- coated glass, comparable to the PEDOT/PSS layer on ITO-coated glass. PEDOT/PSS/gelatin layer on ITO- coated glass enhances pheochromocytoma （PC 12） cell affinity, possesses a high biocompatibility and promotes PC 12 cell growth by delivery of electrical stimulation. These results suggest that gelatin can be incorporated into the PEDOT/PSS polymers through electrochemical polymerization and the PEDOT/PSS/gelatin layer on ITO-coated glass possesses high electrochemical and biological activities.

Preparation and Characterization of Clay (Maghnite-H)/Poly(3,4-Ethylenedioxythiophene) Composites

Composites of Maghnite-H, a Montmorillonite sheet silicate clay, exchanged with protons, and Poly(3,4-ethylenedioxythiophene) (PEDOT) were prepared by in situ chemical polymerization of the 3,4-ethylenedioxythiophene, without the use of solvent or oxidant. The effect of changing monomer/clay ratio was studied and the resultant composite structures were characterized by Inferred spectroscopy, 27Al and 13CSolid-State NMR spectroscopy, scanning electron microscopy and powder X-ray diffraction. All analyses are consistent with a structure were the polymer is (partially) intercalated into the clay structure, which in favourable cases lead to exfoliation. The presence of the clay in the polymer leads to a desired increase in thermal stability as witnessed by thermogravimetry.

Utilizing 3,4-ethylenedioxythiophene(EDOT)-bridged non-fullerene acceptors for efficient organic solar cells

A rational design of efficient low-band-gap non-fullerene acceptors(NFAs)for high-performance organic solar cells(OSCs)remains challenging;the main constraint being the decrease in the energy level of the lowest unoccupied molecular orbitals(LUMOs)as the bandgap of A-D-A-type NFAs decrease.Therefore,the short current density(J_(sc))and open-circuit voltage(V_(oc))result in a trade-off relationship,making it difficult to obtain efficient OSCs.Herein,three NFAs(IFL-ED-4 F,IDT-ED-4 F,and IDTT-ED-2 F)were synthesized to address the above-mentioned issue by introducing 3,4-ethylenedioxythiophene(EDOT)as aπ-bridge.These NFAs exhibit relatively low bandgaps(1.67,1.42,and 1.49 eV,respectively)and upshifted LUMO levels(-3.88,-3.84,and-3.81 eV,respectively)compared with most reported low-band-gap NFAs.Consequently,the photovoltaic devices based on IDT-ED-4 F blended with a PBDB-T donor polymer showed the best power conversion efficiency(PCE)of 10.4%with a high J_(sc) of 22.1 mA cm^(-2) and Voc of 0.884 V among the examined NFAs.In contrast,IDTT-ED-4 F,which was designed with an asymmetric structure of the D-p-A type,showed the lowest efficiency of 1.5%owing to the poor morphology and charge transport properties of the binary blend.However,when this was introduced as the third component of the PM6:BTP-BO-4 Cl,complementary absorption and cascade energy-level alignment between the two substances could be achieved.Surprisingly,the IDTT-ED-4 F-based ternary blend device not only improved the Jscand Voc,but also achieved a PCE of 15.2%,which is approximately 5.3%higher than that of the reference device with a minimized energy loss of 0.488 eV.In addition,the universality of IDTT-ED-2 F as a third component was effectively demonstrated in other photoactive systems,specifically,PM6:BTPe C9 and PTB7-Th:IEICO-4 F.This work facilitates a better understanding of the structure–property relationship for utilizing efficient EDOT-bridged NFAs in high-performance OSC applications.

Chemical Oxidative Synthesis and Conductivity of Poly(3,4-ethylenedioxythiophene)

[Objective] This paper was to introduce the chemical oxidative synthesis process, properties and test methods of 3,4-ethylenedioxythiophene(EDOT). [Method] The poor water solubility of EDOT was solved by using polyethylene glycol 20000(PEG) as the surfactant. The monomer was polymerized by chemical oxidative synthesis. The product was analyzed and verified by infrared spectrum, X-ray diffraction, ultraviolet-visible absorption spectra.[Result] The conductivity of the product was the best when the mass ratio of PEG and EDOT was 1∶1. The effects of oxidant dose and reaction time on the conductivity and yield of the product showed certain regularity. [Conclusion] EDOT could be polymerized by PEG and FeCl3, and the polymerization product was PEDOT.

Improvement of the Cycle Performance of LiNi_0.5Mn_1.5O₄Cathode Active Materials by In-Situ Coating with Poly(3,4-Ethylenedioxythiophene)

LiNi0.5Mn1.5O4 (LNMO)/poly(3,4-ethylenedioxythiophene) (PEDOT) composite cathode materials were prepared through in-situ polymerization of thiophene monomer (EDOT), with ammonium persulphate (APS) as oxidizing agent, p-toluenesulfonic acid (PTSA) as dopant. The morphology, amount of PEDOT coating, electrochemical properties of LNMO/PEDOT were characterized by scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and galvanostatic charge and discharge tests. The results show that the composite materials show better cycle performance than bare LNMO.

Overoxidized poly(3,4-ethylenedioxythiophene)-overoxidized polypyrrole composite films with enhanced electrocatalytic ability for rutin and luteolin determination

In this study, a simple and effective method was proposed to improve the electrocatalytic ability of overoxidized poly(3,4-ethylenedioxythiophene)-overoxidized polypyrrole composite films modified on glassy carbon electrode for rutin and luteolin determination. The composite electrode was prepared by cyclic voltammetry copolymerization with LiClO_(4)-water as the supporting electrolyte. The peak current of rutin and luteolin on the composite electrode gradually decreased or even disappeared with the increase in the positive potential limit. After incubation in NaOH–ethanol solution with a volume ratio of 1:1, the composite electrodes prepared at positive potential limit greater than 1.5 V exhibited enhanced differential pulse voltammetry peak currents, reduced charge transfer resistance, larger effective specific surface area and higher electron transfer rate constant. The composite electrode prepared in the potential range of 0–1.7 V showed optimal electrocatalytic performance. The X-ray photoelectron spectroscopy results indicated that the content of –SO_(2)/–SO and –C=N– groups in the composite film increased significantly after incubation. Further, the Raman spectra and Fourier transform infrared spectra revealed that the thiophene ring structure changed from benzene-type to quinone-type, and the quinone-type pyrrole ring was formed. The electrocatalytic mechanism of the composite film was proposed based on the experimental results and further verified by Density Functional Theory calculation.

Structural characteristics and the label-free detection of poly(3,4-ethylenedioxythiophene/cucurbit[7]uril)pseudorotaxane at single molecule level

A multi-technique approach to prove the preparation of poly(3,4-ethylenedioxythiophene/cucurbit[7]uril)pseudorotaxanes(PEDOT∙CB7-PPs)is reported.Molecular docking simulation and matrix-assisted laser desorption/ionization mass spectrometry(MALDI MS)validate the complexation ability of the CB7 molecule towards 3,4-ethylenedioxythiophene(EDOT),which leads to the EDOT∙CB7 inclusion complex.Oxidative polymerization of EDOT∙CB7 enabled the synthesis of PEDOT∙CB7-PPs.The water-soluble part of PEDOT∙CB7-PPs was selected,freeze-dried,and chemically characterized.Furthermore,dynamic light scattering(DLS)has been used to study the particle size and z-potential(ZP-ζ)of PEDOT∙CB7-PPs.The ZP-ζvalue(35 mV)evidenced that the PEDOT∙CB7-PPs formed stable water dispersion.By combining the emerging nanopore resistive pulse sensing technique(Np-RPS)and computational modeling,we identified strong interactions of PEDOT∙CB7-PPs with the aerolysin(Ael)nanopore.PEDOT∙CB7-PPs behave as positive charged species,and thus trans negative bias promotes its interactions with the Ael nanopore.The computational modeling results are fully consistent with the Np-RPS detection,which also reveals strong interactions between PEDOT∙CB7-PPs and the Ael nanopore.With this study,we hope to provide new insights and a better understanding of the interactions between supramolecular complexes based on CB7 and biological entities,which is instrumental for future applications in the field of nanobiotechnology.

血清PCT、CRP及IL-4水平预测小儿支原体肺炎病情严重程度的价值

目的:探讨血清降钙素原(PCT)、C反应蛋白(CRP)及白细胞介素-4(IL-4)水平预测支原体肺炎患儿病情严重程度的价值。方法:选取2019年1月—2023年1月淮安市第二人民医院儿科收治的102例支原体肺炎患儿作为研究对象,根据病情将患儿分为轻症组59例和重症组43例。比较两组临床资料及基质细胞衍生因子(CXCL12)、γ干扰素(IFN-γ)、硫化氢(H_(2)S)、超氧化物歧化酶(SOD)、基质金属蛋白酶-9(MMP-9)、PCT、CRP及IL-4水平,多因素分析采取非条件logistic逐步回归分析,采用ROC曲线分析PCT、CRP及IL-4水平对重症支原体肺炎的预测价值。结果:两组性别、年龄、病程及CXCL12、IFN-γ、H_(2)S、SOD、MMP-9水平比较,差异无统计学意义(P>0.05);重症组PCT、CRP、IL-4水平显著高于轻症组,差异有统计学意义(P<0.05)。logistic逐步回归分析结果显示,PCT、CRP及IL-4为重症支原体肺炎独立危险因素(P<0.05)。ROC分析显示,PCT、CRP及IL-4预测重症支原体肺炎的曲线下面积分别为0.896、0.851、0.787。结论:血清PCT、CRP及IL-4水平均参与支气管肺炎患儿的病情进展,且可作为重症支气管肺炎的诊断指标。

POLY(3,4-ETHYLENEDIOXYTHIOPHENE METHANOL)/ASCORBATE OXIDASE/NAFION-SINGLE-WALLED CARBON NANOTUBES BIOSENSOR FOR VOLTAMMETRIC DETECTION OF VITAMIN C

Vitamin C （VC） content in commercial juices was voltammetrically determined using a highly selective and sensitive poly（3,4-ethylenedioxythiophene methanol）/ascorbate oxidase/Nafion-single-walled carbon nanotubes （PEDOTM/AO/Nation-SWCNT） biosensor. The biocompatible PEDOTM matrix was prepared facilely by the one-step electrochemical deposition technique in lithium perehlorate aqueous solutions. AO was dip-coated on the surface of the biocompatible PEDOTM matrix. The mixture of Nafion-SWCNT was dip-cast onto the surface of AO layer when it was obtained by blending Nation solution and SWCNT dispersion together in a volume ratio of 1：1. The prepared PEDOTM/AO/Nafion-SWCNT biosensor was used for the voltammetric determination of VC, which exhibited the good linear range （4.0 ~ 10-s-3 x 10-s mol/L）, low detection limit （13 I^mol/L）, pronounced sensitivity （1.4072 mA （mmol/L） i cm 2）, high bioaftinity （low apparent Michaelis-Menten constant）, good stability （good repeatability）, high specificity （good anti-interference ability） coupled with the good reliability and feasibility （the determination of VC in commercial juices）. Meanwhile, the good aqueous solubility and the low onset oxidation potential of EDOTM will be more beneficial to the application in biosensor field compared to 3,4-ethylenedioxythiophene. Moreover, the good biocompatibility of PEDOTM matrix and high selectivity of Nation-SWCNT films also provide a promising platform for the development of biosensing devices.

Ⅰ群4型禽腺病毒Y17215-1株体外增殖规律及免疫原性研究

为探讨禽腺病毒4型分离株Y17215-1的体外增殖特性和免疫原性,本研究以LMH细胞为模型,摸索Y17215-1株最佳接种剂量和收获时间;通过活毒滴鼻接种和灭活疫苗肌肉注射的方式免疫SPF鸡,测定其免疫原性。结果显示:Y17215-1株0.1 MOI接种LMH细胞,培养48~72 h病毒滴度达到峰值108.625 TCID_(50)/mL。该病毒经肌肉注射对42日龄SPF鸡具有较强致病性,LD_(50)为103.000 TCID_(50)/0.2 mL。以10^(7.676) TCID_(50)的Y17215-1株滴鼻免疫21日龄SPF鸡,免疫后7 d 100%试验鸡产生中和抗体,14 d达到高峰。以Y17215-1株制备灭活疫苗肌肉注射免疫21日龄SPF鸡(10^(7.676) TCID_(50)/羽),免疫后7 d 70%试验鸡产生中和抗体,21 d达到高峰。在免疫后21 d用1000LD_(50)的Y17215-1株进行攻毒,活毒和灭活疫苗的保护率均为100%。以上结果表明:Y17215-1株具有很好的体外增殖特性和免疫原性,可以作为候选疫苗毒株。

胶质瘤组织中TRIP4和DDIT4水平表达及其与临床病理特征和预后的关系

目的研究胶质瘤组织中甲状腺激素受体结合蛋白4(thyroid hormone receptor interacting protein 4,TRIP4)和DNA损伤诱导转录因子4(DNA damage inducing transcription factor 4,DDIT4)水平表达及其与临床病理特征和预后的关系。方法选取2018年2月~2019年2月河北医科大学第一医院收治的94例胶质瘤患者为研究对象。应用免疫组织化学法检测组织中TRIP4和DDIT4蛋白表达。比较不同临床病理特征脑胶质瘤组织中TRIP4和DDIT4蛋白表达。采用Kaplan-Meier生存曲线分析不同TRIP4和DDIT4蛋白表达胶质瘤患者生存预后的差异。单因素和多因素COX回归分析影响胶质瘤患者生存预后的因素。结果胶质瘤组织中TRIP4(68.09%)和DDIT4(65.96%)蛋白阳性率高于瘤旁组织(13.83%,10.64%),差异具有统计学意义(χ^(2)=57.212,60.866,均P<0.05)。胶质瘤组织中TRIP4与DDIT4蛋白表达呈显著正相关性(r=0.722,P<0.05)。WHO分级Ⅲ级、肿瘤直径≥3cm胶质瘤组织中TRIP4和DDIT4蛋白阳性率均高于WHO分级Ⅰ~Ⅱ级、肿瘤直径<3cm胶质瘤组织,差异具有统计学意义(χ^(2)=6.393~14.754,均P<0.05)。TRIP4阳性表达组和阴性表达组三年总体生存率分别为37.50%(24/64),66.67%(20/30),TRIP4阳性表达组三年累积生存率低于阴性表达组,差异具有统计学意义(Log-rankχ^(2)=5.949,P=0.015)。DDIT4阳性表达组和阴性表达组三年总体生存率分别为37.10%(23/62),70.00%(21/30),DDIT4阳性表达组三年累积生存率低于阴性表达组,差异具有统计学意义(Log-rankχ^(2)=7.642,P=0.006)。肿瘤直径≥3cm(HR=1.614,P=0.000),WHO分级Ⅲ级(HR=1.790,P=0.000),TRIP4阳性表达(HR=1.665,P=0.000),DDIT4阳性表达(HR=1.476,P=0.000)是影响胶质瘤患者生存预后的独立危险因素。结论胶质瘤组织中TRIP4和DDIT4蛋白表达升高,两者与肿瘤直径及WHO分级相关,是潜在的评估胶质瘤预后的肿瘤标志物。

婆罗双树样基因4、嗅素结构域家族蛋白4及激活素A表达水平与类风湿性关节炎患者临床特征的相关性及其对合并关节畸形的预测价值

目的探讨血清婆罗双树样基因4(SALL4)mRNA、嗅素结构域家族蛋白4(OLFM4)mRNA和激活素A(Activin-A)表达水平与类风湿性关节炎(RA)患者临床特征的相关性及其对合并关节畸形的预测价值。方法选择2021年1月至2023年4月河南中医药大学第三附属医院收治的130例RA患者为RA组,另选择同期于门诊体检的102例健康志愿者为对照组。RA组患者于入院第2天、对照组受试者于体检当日,采用酶联免疫吸附试验检测血清Activin-A水平,反转录-聚合酶链反应检测2组受试者血清SALL4、OLFM4 mRNA相对表达量。比较RA组与对照组受试者及不同临床特征RA患者血清SALL4 mRNA、OLFM4 mRNA、Activin-A水平,采用单因素和多因素logistic回归分析RA合并关节畸形的影响因素,采用受试者操作特征曲线分析SALL4 mRNA、OLFM4 mRNA、Activin-A预测RA合并关节畸形的价值。结果RA组患者血清SALL4 mRNA、OLFM4 mRNA相对表达量及Activin-A水平显著高于对照组(P<0.05)。疾病活动度重度患者血清SALL4 mRNA、OLFM4 mRNA相对表达量及Activin-A水平显著高于中度和轻度患者,疾病活动度中度患者血清SALL4 mRNA、OLFM4 mRNA相对表达量及Activin-A水平显著高于轻度患者(P<0.05)。受累关节数目≥10个、滑膜炎持续时间≥6周、关节畸形患者血清SALL4 mRNA、OLFM4 mRNA相对表达量及Activin-A水平分别高于受累关节数目<10个、滑膜炎持续时间<6周、无关节畸形患者(P<0.05)。不同年龄、性别患者血清SALL4 mRNA、OLFM4 mRNA相对表达量及Activin-A水平比较差异无统计学意义(P>0.05)。多因素logistic回归分析结果显示,疾病活动重度及SALL4 mRNA、OLFM4 mRNA、Activin-A水平升高是RA合并关节畸形的危险因素(P<0.05)。Activin-A、SALL4 mRNA、OLFM4 mRNA预测RA合并关节畸形的截断值分别为15.06 pg·L^(-1)、3.412、3.802,曲线下面积分别为0.699、0.693、0.756,SALL4 mRNA、OLFM4 mRNA、Activin-A联合预测RA合并关节畸形的曲线下面积为0.892,联合预测的曲线下面积显著高于单独预测(Z=4.171、2.785、3.626,P<0.05)。结论RA患者血清SALL4 mRNA、OLFM4 mRNA及Activin-A水平增高与RA疾病活动度、受累关节数目、滑膜炎持续时间、关节畸形有关。血清SALL4 mRNA、OLFM4 mRNA、Activin-A联合预测RA合并关节畸形的效能高于三者单独预测。

BOWL-SHAPED POLY(3,4-ETHYLENEDIOXYTHIOPHENE)/γ-Fe_2O_3 COMPOSITES WITH ELECROMAGNETIC FUNCTION

In this paper, electromagnetic poly（3,4-ethylenedioxythiophene）/γ-Fe2O3 （PEDOT/γ-Fe2O3 ） micro-bowls, 1-2 gm in diameter, were prepared by a simple environment-friendly process. In this method, the aqueous solution of cetyltrimethylammonium bromide （CTAB） instead of any organic solvent was used. FeC13 acted as a source of FeIII for the formation of γ-Fe2O3 and as an oxidant for the polymerization of 3,4-ethylenedioxythiophene （EDOT）. The bowl-shaped morphology of PEDOT/γ-Fe2O3 composites was strongly influenced by the concentration of CTAB, FeCl2, ammonia solution and the reaction temperature. The saturation magnetization of PEDOT/γ-Fe2O3 micro-bowls increased with the increase of FeC12 concentration and reached 6.20 AmE/kg at the FeCl2 concentration of 0.30 mol/L. The conductivity of the PEDOT/γ-Fe2O3 composites was in the range of 101 S/cm. The electrical and magnetic sources of PEDOT/γ-Fe2O3 micro-bowls were confirmed by SEM-EDX, TEM, XRD and XPS spectra. And the possible formation mechanism of PEDOT//7：Fe203 was proposed.

基于Penton蛋白禽腺病毒血清4型间接ELISA抗体检测方法的建立

Penton蛋白是构成禽腺病毒血清4型(Fowl adenovirus serotype 4,FAdV-4)衣壳的主要结构蛋白,具备高度保守性与良好的免疫原性。以纯化的Penton蛋白为包被抗原,建立一种基于禽腺病毒血清4型Penton蛋白的间接ELISA抗体检测方法。结果显示,Penton蛋白最佳包被质量浓度为2μg/mL,血清稀释倍数为200倍,酶标抗体稀释倍数为1∶5000,阳性临界值为0.222,敏感性可达到1∶6400,与鸡传染性支气管炎病毒、鸡传染性法氏囊病病毒、鸡传染性喉气管炎病毒均无交叉反应,特异性良好,批间批内重复性变异系数均<10%,在100份临床血清中阳性检出率为77%,与商品化试剂盒检出符合率可达98%。综上,建立的ELISA抗体检测方法可以用于禽腺病毒4型临床抗体检测。

2型糖尿病伴干眼症病人血清和泪液分泌型卷曲相关蛋白5、脂肪酸结合蛋白4水平与病情严重程度的相关性

目的分析分泌型卷曲相关蛋白5(SFRP-5)、脂肪酸结合蛋白4(FABP4)在2型糖尿病(T2DM)伴干眼症病人血清和泪液中的表达及其与病情严重程度的相关性。方法选取2020年12月至2021年12月唐山市眼科医院收治的T2DM病人145例,其中单纯T2DM病人84例168眼(T2DM组),伴干眼症病人61例122眼(T2DM伴干眼症组),另选取同期该院体检健康者50例100眼作为对照组。T2DM伴干眼症病人又分为轻度组(29例)、中度组(17例)、重度组(15例)。利用酶联免疫吸附法测定所有受试者血清和泪液中SFRP-5、FABP4水平;相关性分析采用Pearson法或Spearman法;logistic回归分析影响T2DM病人干眼症发生的因素。结果T2DM伴干眼症组、T2DM组血清和泪液SFRP-5水平均低于对照组(106.09±8.37、135.72±9.26比158.34±9.45,28.85±5.13、58.27±6.14比45.18±5.92),T2DM伴干眼症组低于T2DM组(P<0.05);T2DM伴干眼症组、T2DM组血清和泪液FABP4水平均高于对照组(70.63±6.59、58.27±6.14比45.18±5.92,15.91±3.76、10.28±3.58比7.72±3.29),T2DM伴干眼症组高于T2DM组(P<0.05)。重度组、中度组血清和泪液SFRP-5水平(68.29±7.15、95.54±8.34比131.82±9.02,12.83±4.62、24.72±5.49比39.56±5.18)、泪膜破裂时间(BUT)、泪液分泌试验(SIT)低于轻度组,重度组低于中度组(P<0.05);重度组、中度组血清和泪液FABP4水平(84.56±6.83、73.18±6.94比61.93±6.27,25.64±4.19、17.15±3.86比10.16±3.47)及眼表疾病指数量表(OSDI)积分高于轻度组,重度组高于中度组(P<0.05)。T2DM伴干眼症病人血清与泪液SFRP-5水平呈正相关,血清与泪液FABP4水平也呈正相关(P<0.05)。T2DM伴干眼症病人血清和泪液SFRP-5水平与OSDI积分均呈负相关,与BUT、SIT均呈正相关(P<0.05);血清和泪液FABP4水平与OSDI积分均呈正相关,与BUT、SIT均呈负相关(P<0.05)。血清和泪液SFRP-5水平是影响T2DM病人干眼症发生的独立保护因素,而血清和泪液FABP4水平是独立危险因素(P<0.05)。结论SFRP-5在T2DM伴干眼症病人血清和泪液中均低表达,FABP4均高表达,二者与病情严重程度密切相关。

香蕉枯萎病菌内源报告基因Foc4carS的鉴定及其应用

香蕉枯萎病是由尖孢镰刀菌古巴转化型(Fusarium oxysporum f. sp. cubense, Foc)引起的香蕉毁灭性土传病害,其中4号生理小种(Foc4)能感染几乎所有的香蕉品系,危害最严重。carS基因通过调控下游car结构基因参与调控镰刀菌类胡萝卜素的生物合成,本研究克隆鉴定了Foc4carS基因(FOIG_05085),Foc4carS蛋白具有典型的RING-finger蛋白结构域。利用分割标记法(Split-marker PCR)获得Foc4carS基因的融合片段,同时构建含有Foc4carS基因sgRNA591序列的pUC-fFuCas9-HTBNLS-hph-Foc4carS基因编辑载体,通过PEG介导的原生质体转化获得该基因的敲除突变体、回补突变体以及基因编辑敲除体,并对敲除和回补突变体的生物学特性和致病力进行分析。结果显示:ΔFoc4carS突变体的菌落直径、产孢量和致病力等生物学表型与野生菌株Foc4无显著差异,而ΔFoc4carS突变体菌落颜色呈深橙色,Foc4carS基因的缺失影响了次生代谢产物类胡萝卜素的生物合成;基因编辑的ΔFoc4carS(HDR)突变体不论是再生筛选板还是继代后的PDA平板,其菌落均出现典型的深橙色,表明Foc4carS可作为内源报告基因,在香蕉枯萎菌Foc4中进行基因质粒型CRISPR/Cas9编辑可行。

猪细小病毒4型单克隆抗体制备及抗原表位鉴定

为了制备猪细小病毒(PPV)4型Cap蛋白单克隆抗体(mAb)并鉴定其抗原表位,试验采用原核表达的Cap重组蛋白免疫BALB/c小鼠,将其脾细胞与SP2/0细胞进行融合,通过酶联免疫吸附测定(ELISA)、血凝抑制(HI)和免疫过氧化物酶单层细胞试验(IPMA)筛选阳性克隆,最终获得2E7、4D6和5C9这3株特异性杂交瘤细胞株;然后用mAb对Cap蛋白多肽进行ELISA检测,鉴定分析其抗原表位。结果显示:4D6和5C9 mAb识别表位为线性表位,分别为387RRQDN^(391)和578QRKE^(581),而2E7 mAb识别的表位为构象表位;通过对Cap蛋白3D结构定位分析,387RRQDN^(391)和578QRKE^(581)抗原表位位于蛋白表面,且在PPV4亚型中高度保守,而与猪瘟病毒(CSFV)、猪伪狂犬病病毒(PRV)、猪圆环病毒2型(PCV-2)、猪繁殖与呼吸综合征病毒(PRRSV)、猪乙型脑炎病毒(JEV)和猪博卡病毒(PBoV)基因序列同源性低。本研究为PPV4诊断试剂的开发和新型疫苗的研制提供了参考。

全雌型工业大麻杂交新品种云麻杂4号的选育与应用前景

云麻杂4号是云南省农业科学院经济作物研究所以雌雄异株品种云麻8号近交系为母本,雌雄同株2017M5近交系为父本,利用杂种优势组配而成的工业大麻全雌型晚熟杂交种。2020—2021年多点区域试验中花叶平均产量3012.45 kg/hm^(2),比对照云麻8号增产34.82%。该品种雌株比例大于95%,全生育期约167 d,THC平均含量为0.07%,CBD平均含量3.06%,籽粒含油量31.8%,蛋白质含量23.0%。适合云南省大部分地区种植,最适宜海拔范围为1500~2300 m。2023年通过云南省品种鉴定和登记。