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T细胞条件性敲除Spi1基因小鼠的繁育及鉴定

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安徽医科大学学报 2024年第4期59卷 595-599页

作者：王卉卉朱向玲吴旭铭张慧茹周园园王安琪刘崇涂佳杰安徽医科大学临床药理研究所抗炎免疫药物教育部重点实验室抗炎免疫药物安徽协同创新中心合肥230032

目的繁育T细胞条件性敲除Spi1基因的小鼠并对其进行鉴定,为进一步探索Spi1编码蛋白PU.1的作用提供研究基础。方法将Lck-Cre小鼠与Spi1^(flox/flox)小鼠进行杂交繁育,通过聚合酶链式反应(PCR)和琼脂糖凝胶电泳鉴定小鼠基因型,筛选出基因... 详细信息

目的繁育T细胞条件性敲除Spi1基因的小鼠并对其进行鉴定,为进一步探索Spi1编码蛋白PU.1的作用提供研究基础。方法将Lck-Cre小鼠与Spi1^(flox/flox)小鼠进行杂交繁育,通过聚合酶链式反应(PCR)和琼脂糖凝胶电泳鉴定小鼠基因型,筛选出基因型为Lck-Cre×Spi1^(flox/flox)的小鼠即为T细胞条件性敲除Spi1基因的纯合子小鼠。使用磁珠分选脾脏T淋巴细胞,并应用Western blot、实时荧光定量PCR(qPCR)及流式细胞术检测PU.1在T细胞中的敲除效率。结果Lck-Cre×Spi1^(flox/flox)小鼠基因稳定遗传。与Spi1^(flox/flox)小鼠相比,Lck-Cre×Spi1^(flox/flox)小鼠脾脏T细胞中的PU.1表达水平显著降低。结论该研究应用Cre/LoxP系统和CRISPR/Cas9技术成功构建了T细胞条件性敲除Spi1基因小鼠,为后续研究PU.1在T细胞相关疾病中的具体作用提供了可靠的动物模型。

关键词： Spi1 Cre/LoxP系统 CRISPR/Cas9技术 T细胞 PU.1 条件性敲除

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白羽鸡致病性大肠杆菌、沙门氏菌的分离鉴定及抗生素耐受性分析

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微生物学通报 2024年第7期51卷 2563-2575页

作者：赵泰霞周圆圆田雯欣罗忠宝黄宝钦胥海霞华咏诗郑谦波陈兰明范俐上海海洋大学食品学院上海201499 武夷学院茶与食品学院福建武夷山354300 福建圣农发展股份有限公司福建光泽354100

【背景】大肠杆菌、沙门氏菌是肉鸡养殖中的主要致病菌,可造成巨大的经济损失,其耐药情况不容忽视。【目的】从病死鸡体内分离致病性大肠杆菌、沙门氏菌并对其进行鉴定,分析其耐药特性。【方法】常规方法分离纯化目标菌株,结合生化试验... 详细信息

【背景】大肠杆菌、沙门氏菌是肉鸡养殖中的主要致病菌,可造成巨大的经济损失,其耐药情况不容忽视。【目的】从病死鸡体内分离致病性大肠杆菌、沙门氏菌并对其进行鉴定,分析其耐药特性。【方法】常规方法分离纯化目标菌株,结合生化试验、16SrRNA基因序列分析、生长曲线验证进行鉴定,采用纸片扩散法进行药敏试验,分析其耐药率及多重耐药性。【结果】共分离得到10株大肠杆菌和10株沙门氏菌(包括4株肠道亚种、1株亚利桑那亚种和5株邦戈尔沙门氏菌种);大肠杆菌仅对碳青霉烯类药物敏感,对其他类药物耐药性较强;沙门氏菌对碳青霉烯类药物敏感,对其他类药物则呈现不同程度的耐药性;所有分离菌均为多重耐药菌。【结论】分离得到了病原菌并确定了其耐药特性,为白羽鸡养殖中大肠杆菌、沙门氏菌的防治提供了参考。

关键词：白羽鸡鸡源致病性大肠杆菌鸡源致病性沙门氏菌分离鉴定耐药性

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髓系特异性Spi1基因敲除小鼠的构建和基因鉴定

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安徽医科大学学报 2024年第3期59卷 413-417页

作者：吴旭铭王卉卉朱向玲周园园王安琪张慧茹刘崇涂佳杰安徽医科大学临床药理研究所合肥230032

目的构建髓系特异性Spi1基因敲除小鼠并分析其基因型,为疾病病理机制及药物靶点研究提供动物模型基础。方法根据CRISPR/Cas9技术原理和Cre/LoxP系统,设计并构建sgRNA和Donor载体,以第2号外显子(Exon 2)所在的转录本为敲除区域,在Exon 2... 详细信息

目的构建髓系特异性Spi1基因敲除小鼠并分析其基因型,为疾病病理机制及药物靶点研究提供动物模型基础。方法根据CRISPR/Cas9技术原理和Cre/LoxP系统,设计并构建sgRNA和Donor载体,以第2号外显子(Exon 2)所在的转录本为敲除区域,在Exon 2两侧各放置同向Loxp元件;将Cas9蛋白、sgRNA和Donor载体混合显微注射到C57BL/6J小鼠的受精卵中,移植受精卵到假孕的C57BL/6J母鼠的子宫中,19~20 d后获得F0代。将阳性F0代小鼠与C57BL/6J小鼠交配,得到稳定的F1代Spi1^(flox/+)小鼠。F1代Spi1^(flox/+)小鼠雌雄自交得到Spi1^(flox/flox)小鼠。Spi1^(flox/flox)与Lyz2-Cre^(+)小鼠交配得到Spi1^(flox/+)/Lyz2-Cre^(+)小鼠,再将其与Spi1^(flox/flox)交配,得到的Spi1^(flox/flox)/Lyz2-Cre^(+)小鼠为髓系特异性Spi1基因敲除(KO)小鼠;Spi1^(flox/flox)/Lyz2-Cre^(-)小鼠作为野生型(WT)小鼠。提取WT和KO小鼠DNA,PCR扩增后琼脂糖凝胶电泳鉴定基因型;Western blot检测WT和KO小鼠免疫细胞中脾病灶形成病毒前病毒整合癌基因-1/富含嘌呤盒1(PU.1)表达。结果PCR鉴定结果显示,采用flox引物鉴定时仅扩增出220 bp条带的小鼠,即基因型为Spi1^(flox/flox)纯合子,采用Lyz2-Cre引物鉴定时扩增出700 bp的小鼠,基因型为Lyz2-Cre^(+);Western blot结果显示,与WT组比较,KO组小鼠骨髓来源巨噬细胞(BMDMs)和腹腔原位巨噬细胞(PM)中的PU.1不表达(P<0.01);T细胞中KO小鼠PU.1表达水平与WT小鼠差异无统计学意义;PCR和Western blot结果均表明髓系特异性Spi1 KO小鼠构建成功。结论成功构建和鉴定髓系特异性Spi1 KO小鼠,为进一步揭示PU.1在免疫调节中的潜在机制研究提供动物模型基础。

关键词：髓系特异性 Spi1 基因敲除 CRISPR/Cas9 Cre/LoxP PCR Western blot

Yanggan Jiangmei Formula alleviates hepatic inflammation and lipid accumulation in non-alcoholic steatohepatitis by inhibiting the NF-κB/NLRP3 signaling pathway

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Chinese Journal of Natural Medicines 2024年第3期22卷 224-234页

作者： WU yuanyuan zhou Jingwen ZUO Xinchen KUANG Yufeng SUN Lixia ZHANG Xiaolong The First Clinical Medical College Nanjing University of Chinese MedicineNanjing 210023China The Affiliated Hospital of Nanjing University of Chinese Medicine Jiangsu Province Hospital of Chinese MedicineNanjing 210029China

The role of NF-κB and the NLRP3 inflammasome in the chronic inflammatory microenvironment of non-alcoholic steatohepatitis(NASH)has been posited as *** Yanggan Jiangmei Formula(YGJMF)has shown promise in ameliorating hepatic steatosis in NASH patients,yet its pharmacological mechanisms remain largely *** study was conducted to investigate the efficacy of YGJMF in NASH and to elucidate its pharmacological *** simulate NASH both in vivo and in vitro,high-fat-diet(HFD)rats and HepG2 cells stimulated with free fatty acids(FFAs)were *** severity of liver injury and lipid deposition was assessed using serum indicators,histopathological staining,micro-magnetic resonance imaging(MRI),and the liver-tomuscle signal intensity ratio(SIRL/M).Furthermore,a combination of enzyme-linked immunosorbent assay(ELISA),immunohistochemistry(IHC),immunofluorescence,real-time quantitative polymerase chain reaction(RT-qPCR),and Western blotting analyses was employed to investigate the NF-κB/NLRP3 signaling pathway and associated cytokine *** results from liver pathology,MRI assessments,and biochemical tests in rat models demonstrated YGJMF’s significant effectiveness in reducing liver damage and lipid ***,YGJMF markedly reduced hepatocyte inflammation by downregulating inflammatory cytokines in both liver tissue and ***,YGJMF was found to disrupt NF-κB activation,consequently inhibiting the assembly of the NLRP3 inflammasome in both the in vitro and in vivo *** preliminary findings of this study suggest that YGJMF may alleviate hepatic steatosis and inhibit the NF-κB/NLRP3 signaling pathway,thereby exerting anti-inflammatory effects in NASH.

关键词： Non-alcoholic steatohepatitis Nuclear factor kappa B NLRP3 inflammasome Yanggan Jiangmei Formula

High-member low-dimensional Sn-based perovskite solar cells

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Science China Chemistry 2023年第2期66卷 459-465页

作者： Hansheng Li Zihao Zang Qi Wei Xianyuan Jiang Mingyu Ma Zengshan Xing Jingtian Wang Danni Yu Fei Wang Wenjia zhou Kam Sing Wong Philip C.Y.Chow yuanyuan zhou Zhijun Ning School of Physical Science and Technology ShanghaiTech UniversityShanghai201210China Department of Physics Hong Kong University of Science and TechnologyHong Kong999077China Department of Mechanical Engineering The University of Hong KongHong Kong999077China Department of Physics Hong Kong Baptist UniversityHong Kong999077China

Sn-based perovskites are promising thin-film photovoltaic materials for their ideal bandgap and the eco-friendliness of Sn,but the performance of Sn-based perovskite solar cells is hindered by the short carrier diffusion length and large defect density in nominally-synthesized Sn-based perovskite *** we demonstrate that a long carrier diffusion length is achievable in quasi-2D Sn-based perovskite films consisting of high-member low-dimensional Ruddlesden-Popper(RP)phases with a preferred crystal orientation *** key to the film synthesis is the use of a molecular additive formed by phenylethylammonium cations and optimally mixed halide-pseudohalide anions,which favorably tailors the quasi-2D Sn-based perovskite crystallization *** high-member RP film structure effectively enhances device short-circuit current density,giving rise to an increased power conversion efficiency(PCE)of 14.6%.The resulting device demonstrates a near-unity shelf stability upon1,000 h in nitrogen.A high reproductivity is also achieved with a count of 50 devices showing PCEs within a narrow range from minimum 13.0%to maximum 14.6%.

关键词： Sn-based perovskite lead-free perovskite solar cells low-dimensional structure optoelectronics device

Impact of oxygen incorporation on interface optimization and defect suppression for efficiency enhancement in Cu_(2)ZnSn(S,Se)_(4)solar cells

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Journal of Energy Chemistry 2024年第8期95卷 77-85,I0003页

作者： Shicheng Deng Songfan Wang yuanyuan Wang Qian Xiao Yuena Meng Dongxing Kou Wenhui zhou Zhengji zhou Zhi Zheng Sixin Wu Key Laboratory for Special Functional Materials of MOE National&Local Joint Engineering Research Centre for High-efficiency Display and Lighting TechnologySchool of MaterialsHenan UniversityKaifeng 475004HenanChina Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province Institute of Surface Micro and Nano MaterialsCollege of Chemical and Materials EngineeringXuchang UniversityXuchang 461000HenanChina

Kesterite Cu_(2)ZnSn(S,Se)_(4)(CZTSSe)solar cells suffer from severe carrier recombination,limiting the photovoltaic *** energy band alignment at the p-n junction and defective front interface are two main ***,oxygen incorporation in CZTSSe via absorber air-annealing was developed as a strategy to optimize its surface photoelectric property and reduce the *** optimized oxygen incorporation conditions,the carrier separation and collection behavior at the front interface of the device is *** particular,it is found that oxygen incorporated absorber exhibits increased band bending,larger depletion region width,and suppressed absorber *** indicate the dynamic factors for carrier separation become ***,the increased potential difference between grain boundaries and intra grains combined with the decreased concentration of interface deep level defect in the absorber provide a better path for carrier *** a consequence,the champion efficiency of CZTSSe solar cells has been improved from 9.74%to 12.04%with significantly improved open-circuit voltage after optimized air-annealing *** work provides a new insight for interface engineering to improve the photoelectric conversion efficiency of CZTSSe devices.

关键词： Kesterite Thin film solar cell Interface optimization Surface oxidation Defect suppression

Numerical Study and Optimization of a Combined Thermoelectric Assisted Indirect Evaporative Cooling System

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Journal of Thermal Science 2020年第5期29卷 1345-1354页

作者： zhou yuanyuan ZHANG Tao WANG Fang YU Yanshun School of Energy and Power Engineering Nanjing University of Science and TechnologyNanjing 210094China

This paper numerically investigates the performance of a novel combined cross-regenerative cross flow(C-RC)thermoelectric assisted indirect evaporative cooling(TIEC)*** C-RC TIEC system combines the indirect evaporative cooling and thermoelectric cooling technologies.A heat and mass transfer model is developed to perform the performance analysis and optimization of this novel *** comparison between the novel C-RC TIEC system and a regenerative cross flow TIEC system is conducted under various operating *** is found that the novel system provides better performance with higher coefficient of performance(C O P)and higher dew point effectiveness than the regenerative cross flow TIEC system,especially under smaller working current and smaller number of thermoelectric cooling *** performance optimization of the novel system is also made by investigating the influences of primary air parameters,three different mass flow rate ratios,as well as the length ratio of the left wet channel to the whole wet *** results show that there exist optimal mass flow rate ratios and wet channel length ratio resulting in the maximum C O P.

关键词： indirect evaporative cooling thermoelectric regenerative cross flow heat and mass transfer optimization

南襄盆地泌阳凹陷古近系核桃园组页岩含油性及烃类赋存特征

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石油实验地质 2024年第2期46卷 354-365页

作者：金芸芸李楚雄王勇严永新罗曦黄帅博李志明周圆圆孙中良刘雅慧贾梦瑶冷筠滢中国石化河南油田分公司勘探开发研究院河南南阳473132 中国石化石油勘探开发研究院无锡石油地质研究所江苏无锡214126 页岩油气富集机理与高效开发全国重点实验室江苏无锡214126 中国石化河南油田分公司油气勘探管理部河南南阳473132

南襄盆地泌阳凹陷古近系核桃园组发育优质湖相页岩层系,页岩油资源潜力巨大。前人针对该层系页岩含油性及烃类赋存状态的研究相对薄弱,可能是制约泌阳凹陷页岩油勘探突破的重要因素之一。以泌阳凹陷南部Y1井核三段Ⅲ亚段页岩为研究对象... 详细信息

南襄盆地泌阳凹陷古近系核桃园组发育优质湖相页岩层系,页岩油资源潜力巨大。前人针对该层系页岩含油性及烃类赋存状态的研究相对薄弱,可能是制约泌阳凹陷页岩油勘探突破的重要因素之一。以泌阳凹陷南部Y1井核三段Ⅲ亚段页岩为研究对象,通过岩石热解、多温阶热解、X射线衍射等地球化学分析技术,系统开展了页岩含油性、烃类赋存特征及影响因素研究。研究结果显示:核三段Ⅲ亚段页岩岩相组合主要包括长英质页岩相、云灰质页岩相和混合质页岩相,纹层结构发育。烃源岩类型整体处于好—优质范围,热演化程度处于生油阶段。有机显微组分以腐泥型为主,有机质类型为Ⅰ—Ⅱ1型。页岩含油性随埋深增大呈递增趋势,烃类赋存特征由中上部以吸附烃为主,过渡至下部以游离烃为主。碎屑矿物及有机碳含量是控制游离烃和吸附烃含量的主要因素。总体认为,核桃园组下部页岩含油饱和度指数整体高于100 mg/g,游离烃含量平均高于3 mg/g,具备较好的页岩油勘探开发前景。

关键词：页岩油含油性烃类赋存状态核桃园组古近系泌阳凹陷南襄盆地

Machine Vision for Interpreting Perovskite Grain Characteristics

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Accounts of Materials Research 2023年第3期4卷 209-211页

作者： Yalan Zhang yuanyuan zhou Department of Physics Hong Kong Baptist UniversityKowloonHong Kong SAR 999077China

Metal halide perovskites(MHPs)are a new class of materials with general chemical formula of ABX3,where A is CH_(3)NH_(3)+(MA+),HC(NH_(2))_(2)+FA+),or Cs+;B is Pb^(2+)or Sn^(2+);X is a halide anion(I^(−),Br^(−),or Cl^(−)),as shown in Figure 1a.1 While the standard MHPs crystal exhibit 3D structures,an even larger subclass of 2D MHPs can be formed with numerous types of organic A-cations by leveraging its rich *** the past few years,MHPs have found promising applications in a range of optoelectronic devices including solar cells,light-emitting diodes,photodetectors and ***,perovskite-based solar cells(PSCs)have been considered as a dominating candidate in the future of the photovoltaic industry.

关键词： chemistry perovskite halide