基于MOD10A1 V6产品下青海省各片区积雪的分布气候特征

利用MOD10A1 V6版积雪产品获取青海省及省内各重要生态功能区的积雪信息,并对积雪变化与气候因子间的响应关系进行分析。结果表明:(1)16年来青海省内积雪覆盖面积变化存在空间差异性,可可西里积雪覆盖面积显著增加(p<0.05)而其他生态功能区变化不显著,从阶段变化来看青海省及各生态功能区在2016积雪季后积雪覆盖面积大幅增加,而在2016积雪季前仅柴达木盆地积雪覆盖面积显著减少(p<0.05),其余地区减少趋势不显著。(2)16年来青海省内积雪日数变化存在空间差异性,可可西里内26.8%的面积积雪日数显著增加(p<0.05),而三江源腹部、柴达木盆地东部和祁连山地区西部积雪日数显著减少(p<0.05)。(3)近16年来青海省及各生态功能区积雪覆盖面积与降水显著正相关(r>0.65,p<0.01),与气温显著负相关(r>0.5,p<0.05),其中在青海省、祁连山、可可西里和柴达木盆地的积雪覆盖面积变化主要受降水主导,而三江源和青海湖流域则是由气温和降水共同影响。

Crystal Structures and Luminescent Properties of Three Coordination Polymers Based on 2,5-Furandicarboxylic Acid Ligand and 1,10-Phenanthroline

Three new coordination polymers,namely [Zn（FDA）（phen）（H2O）·H2O]n（1）,[Cd（HFDA）（phen）2（NO3）]（2） and [Cd（FDA）（phen）]n（3）（H2FDA = 2,5-furandicarboxylic acid,phen = 1,10-phenanthroline） have been synthesized by the solvothermal method and characterized by elemental analysis,IR,powder X-ray diffraction,thermogravimetric analysis and X-ray single-crystal diffraction analysis.For 1,the neighboring Zn^2＋ ions are bridged by FDA2-as linkers to form one-dimensional（1D） chains,and phen ligands are as the terminal ligands.Furthermore,the 1D chains are packed into a three-dimensional（3D） supramolecular structure through hydrogen bonds and π-π interactions.For 2,the H2FDA ligand is partial deprotonation,which is a rare phenomenon among other coordination polymers based on H2FDA.Under the synergetic effect of phen ligands and the partial deprotonation of H2FDA,the structure of 2 is discrete.For 3,the Cd^2＋ ions are linked by two carboxylates of FDA^2-ligand to give rise to 1 D zig-zag chains,and phen ligands chelate the Cd^2＋ ions like 1.In addition,solid-state luminescent spectra of three coordination polymers were also studied at room temperature.

Preparation and Structural Analysis of Lanthanide Complexes with α-Hydroxyl-phenyl-acetic Acid and 1,10-Phenanthroline as Ligands

A series of ternary lanthanide complexes Ln （C6H5CHOHCOO）3（phen） （H2O） （Ln= La, Ce, Pr, Nd, Sm, Eu） were synthesized with α-hydroxyl-phenyl-acetic acid and 1, 10-phenanthroline （phen） as ligands. The sturcture and property of complexes were characterized by elemental analysis, IR, 1^H-NMR, UV and TGA, and the coordinate mede of both ligands was discussed. It was shown that the co-ordinate mode of 1, 10-phenanthroline was chelated, while α-hydraxyl-phenyl-acetate ion was monedentate or bridging. The mechanism of thermal determinde by thermogravimetry was indicated that the degree of co-ordinate ability of ligand was： α-hydroxyl-phenyl-acetate ion 〉 1, 10- phenanthroline（phen）.

The CBL-interacting protein kinase OsCIPK1 phosphorylated by SAPK10 positively regulates responses to ABA and osmotic stress in rice

SubclassⅢsucrose nonfermenting1-related protein kinase 2s(SnRK2s)function in ABA and abiotic stress responses by unknown mechanisms.We found that osmotic stress/ABA-activated protein kinase 10(SAPK10),a member of rice SnRK2s,physically interacted with CBL-interacting protein kinase 1(OsCIPK1).OsCIPK1 expression was up-regulated by ABA and PEG treatment,and overexpression increased the ABA sensitivity of seed germination and root growth and plant osmotic stress tolerance.Osmotic stress or ABA-induced activation of OsCIPK1 is dependent on SAPK10.SAPK10 phosphorylates Thr-24 of OsCIPK1 in vitro,and this phosphorylation increases the activity of OsCIPK1 and positively regulates the function of OsCIPK1 in ABA responses and plant osmotic stress tolerance.This study suggests that OsCIPK1 is a direct phosphorylated substrate of SAPK10,and SAPK10-mediated phosphorylation of OsCIPK1 functions in ABA signaling and increases rice osmotic stress tolerance.

Phase Ib study of anti-EGFR antibody(SCT200)in combination with anti-PD-1 antibody(SCT-I10A)for patients with RAS/BRAF wild-type metastatic colorectal cancer

Objective:This study evaluated the safety and efficacy of an anti-epidermal growth factor receptor(EGFR)antibody(SCT200)and an anti-programmed cell death 1(PD-1)antibody(SCT-I10A)as third-line or subsequent therapies in patients with rat sarcoma viral oncogene(RAS)/v-raf murine sarcoma viral oncogene homolog B(BRAF)wild-type(wt)metastatic colorectal cancer(mCRC).Methods:We conducted a multicenter,open-label,phase Ib clinical trial.Patients with histologically confirmed RAS/BRAF wt m CRC with more than two lines of treatment were enrolled and treated with SCT-I10A and SCT200.The primary endpoints were the objective response rate(ORR)and safety.The secondary endpoints included disease control rate(DCR),progression-free survival(PFS),and overall survival(OS).Results:Twenty-one patients were enrolled in the study through January 28,2023.The ORR was 28.57%and the DCR was 85.71%(18/21).The median PFS and OS were 4.14 and 12.84 months,respectively.The treatment-related adverse events(TRAEs)were tolerable.Moreover,compared with the monotherapy cohort from our previous phase I study evaluating SCT200 for RAS/BRAF wt m CRC in a third-line setting,no significant improvements in PFS and OS were observed in the combination group.Conclusions:SCT200 combined with SCT-I10A demonstrated promising efficacy in previously treated RAS/BRAF wt m CRC patients with an acceptable safety profile.Further head-to-head studies with larger sample sizes are needed to validate whether the efficacy and safety of combined anti-EGFR and anti-PD-1 therapy are superior to anti-EGFR monotherapy in the third-line setting.(Registration No.NCT04229537).

Shift in pKa of 1,10-Phenanthroline in TBAB and PEG-400 Micellar Media: A Potentiometric Study

The acid-base equilibrium of 1,10-phenanthroline (1,10-phen) in the presence of polyethylene glycol 400 (PEG-400, non-ionic) and tetrabutylammonium bromide (TBAB, ionic) micellar media has been studied by Calvin-Wilson titration technique at different mole fractions (0.5% - 2.5%) of PEG-400 and TBAB micellar solutions at an ionic strength of 0.16 mol dm-3 NaCl and at a temperature of 298 K. The pH metric data were subjected to SCPHD program to obtain correction factor and Kw which were given as initial inputs for MINIQUAD75 program to refine protonation constants. HySS program was then used to generate the species distribution diagrams versus pH using the results obtained from the MINIQUAD75 program and SIM run data. The difference in values of protonation constants in aqueous medium (logβ1 = 4.93 & logβ2 = 6.22) and in the micellar media (PEG-400, logβ1 = 4.89 & logβ2 = 5.91 and TBAB, logβ1 = 4.84 & logβ2 = 5.73) is attributed to different intrinsic solvent characteristics of micelles. In case of ionic surfactants, the electrostatic micellar surface is an additional contributing factor.

Synthesis of 5-Substituted 2, 9-Dimethyl-1,10-Phenanthroline Dialdehydes and Their Schiff Bases with Sulfur-Containing Amines

Eight new Schiff bases of 5-nitro and 5-bromo-substituted 1,10-phenanthroline-2,9-dicarboxaldehydes with sulfur-containing amines, thiosemicarbazide, S-alkyl/aryl dithiocarbazates and 2-mercaptoaniline have been synthesized and characterized by a variety of spectroscopic methods. The condensation reactions of the dialdehydes with the amines were carried out both in the presence and absence of conc. sulfuric acid. A significant increase in yield of the Schiff bases was observed when the reactions were carried out in the presence of sulfuric acid.

Antibacterial Activities of New Schiff Bases and Intermediate Silyl Compounds Synthesized from 5-Substituted-1,10-phenanthroline- 2,9-dialdehyde

Schiff bases are known to possess anticancer, antibacterial, antifungal, antitubercular, anti-inflammatory, antimicrobial and antimalarial properties. In this paper antibacterial studies against variety of plants and human pathogenic bacteria with eight newly synthesized Schiff bases and several intermediate silyl compounds have been reported. The antibacterial activities of the synthesized compounds were primarily determined by paper disc diffusion method. The minimum inhibitory concentration (MIC) of each compound was also determined by tube dilution process. Seven different human pathogenic bacteria and eighteen different plant pathogenic bacteria were used for the antibacterial activity studies. While all synthesized compounds have shown significant antibacterial activity, one intermediate silyl compound has shown remarkably high antibacterial property. 5-substituted derivatives have shown relatively higher activity than non-substituted compounds. Polar substituent which increases hydrophilicity may have a positive impact on the antibacterial property.

On the Rare Earth Chelates of(1'-Phenyl-3'-Methyl-5'-Pyrazolone-4')-Carbonylmethanoic Acid and 1,10-Phenanthroline

Some rare earth chelates of(1'-phenyl-3'-methyl-5'-phrazolone-4')-carbonylmethanoic acid and 1, 10-phenanthroline have been synthesized.The composition of the complexes were confirmed by elemental analy. sis.The molar conductance,IR,~4H-NMR,electronic spectra and thermogravimetric analysis of the chelates have been measured and discussed.

Synthesis and Crystal Structure of the Copper(Ⅱ) Complex with 1,10-Phenanthroline-5,6-dione

The complex Cu(phon)(NO3)2(CH3CN) (phon = 1,10-phenanthroline-5,6-dione) has been synthesized and characterized by elemental analysis, infrared and UV-Vis spectra. X-ray diffraction analysis at room temperature indicates that the complex crystallizes in orthorhombic system, space group P212121 with a = 8.353(1), b = 11.299(2), c = 17.764(2) A, V= 1676.5(4) A3, Z = 4, C14H9CuN5O8, Mr = 438.8, Dc = 1.739 g/cm3, F(000) = 884 and μ(MoKα) = 1.361 mm-1. The final R and wR factors for the observed reflections with I > 2σ(I) are 0.0353 and 0.0855, respectively. R = 0.0432 and wR = 0.0899 for all data. The structure of the title complex consists of a neutral mononuclear entity. The central Cu (II) atom is five-coordinated by two nitrogen donors of one ligand, two unidentate NO3- ions and one CH3CN molecule. The coordination geometry of Cu (II) can be considered as a distorted trigonal bipyramidal configuration. The complex ability of the NO3-ion has more effect than that of the ClO4- ion on the structure of the complex.

Synthesis and Crystal Structure of the Copper(II) Complex with Tris-(1,10-phenanthroline-5,6-dione)

The title complex [CuL3]（ClO4）2·2H2O·2CH3CN （L = 1,10-phenanthroline-5,6-dione） has been synthesized and characterized by elemental analysis, conductivity, infrared and UV-Vis spectra. X-ray diffraction analysis at room temperature indicates that the complex （C40H28Cl2CuN8O16, Mr = 1011.14） crystallizes in orthorhombic system, space group P212121 with a=13.983（1）, b=14.310（1）, c= 20\^890（2） , V = 4179.7（6） 3, Z = 4, Dc = 1.607 g/cm3, F（000） = 2026,μ（MoKα） = 0.736 mm-1. The final R and wR factors are 0.0446 and 0.1212 respectively with 8545 independent reflections. The title complex is composed of a discrete [CuL3]2+ cation, uncoordinated ClO4- anions, H2O and CH3CN molecules. The central Cu（II） atom is six-coordinated by six nitrogen donors of three ligands. The coordination geometry of Cu（II） could be considered as an approximately ideal octahedral configuration with little static Jahn-Teller distortion （the longest and shortest Cu-N bonds are 2.102 vs 2.139 with the mean length of 2.122 ）, which is very rare for a six-coordinated Cu（II） complex.

Syntheses, Structures and Properties of Two Mn(Ⅱ) Clusters Based on 1,10-Phenanthroline-2,9-dicarbaldehyde Dioxime Ligand

Two novel clusters [Mn~Ⅲ_3（μ_3-O）（phendox）3]X·13H_2O（X = Cl（1）, Br（2]） have been obtained from the solvothermal reactions of 1,10-phenanthroline-2,9-dicarbaldehyde dioxime（H_2phendox） with MnCl_2·4H_2O or anhydrous MnBr_2, and their structures were characterized by elemental analysis, FT-IR, XRD, TGA, MS and single-crystal X-ray diffraction. It crystallizes in trigonal, space group P3_1/c. X-ray analysis reveals that the neighbouring [Mn_3（μ_3-O）（phendox）_3]＋ cores are linked by C–H···Cl hydrogen bonds and form an infinite supramolecular chain along the c-axis. Neighbouring chains are packed with each other by off-set p-p interactions of the aromatic rings on phenox2-. A 3D supramolecular architecture in a honeycomb topology is formed with 1D hexagonal channel in the dimensions of 13？ × 13？ along the c-axis. The gas adsorption studies show that compound 1·13H_2O is stable upon the removal of guest molecules and the desolvated compound absorbed considerable amount of CO_2.

Hydrothermal Syntheses and Crystal Structures of Three Lanthanide(Ⅲ)Complexes Based on Carboxyl Derivatives of 1,10-Phenanthroline

Three lanthanide（III） complexes [Ln（4-NCP）（1,4-BDC）]n·xn H2O（Ln = Pr（1）, Sm（2）, Nd（3）. 4-HNCP = 2-（4-carboxyphenyl）imidazo（4,5-f）（1,10）phenanthroline, 1,4-H2 BDC = benzene-1,4-dicarboxylic acid） have been hydrothermally synthesized and characterized via elemental analysis, infrared spectrometry and single-crystal X-ray diffraction. Structural analyses revealed that complexes 1~3 possess similar porous three-dimensional frameworks with the point symbol {4^（12）·6~3}. Meanwhile, complexes 1~3 exhibit excellent thermal stabilities and complex 2 exhibits characteristic luminescent property.

Trinuclear Metal Complexes Based on 1,10-Phenanthroline Derivates as Catalysts for Cleavage of a RNA-Model Substrate

Two multidentate ligands 2,9-di[6＇-（2″-hydroxyl-3″-methoxyphenyl）-n-2＇,5＇-diazahexyl]-1,10-phenanthroline（LA）and 2,9-di（6＇-α-phenol-n-2＇,5＇-diazahexyl）-1,10-phenanthroline（LB）were synthesized and fully characterized.Protonation of the ligands and the stability of the complexes of the ligands with divalent metal ions were investigated.The trinuclear metal complexes [Cu（Ⅱ）and Zn（Ⅱ）] of the ligands were studied,as catalysts,for the transphosphorylation of the RNA-model substrate 2-hydroxypropyl-p-nitrophenyl phosphate（HPNP）.The second-order rate constants of HPNP-hydrolysis catalyzed by M3L and M3LH-1 were obtained,which indicated that Zn3LBH-1 was the most efficient catalyst among them.The proposed mechanisms included the activation of the substrate via binding to the metal ions and intramolecular nucleophilic attack by the deprotonated C2-hydroxyl of HPNP.

Long non-coding RNA DPP10-AS1 represses the proliferation and invasiveness of glioblastoma by regulating miR-24-3p/CHD5 signaling pathway

This investigation aimed to unveil new prospective diagnosis-related biomarkers together with treatment targets against glioblastoma.Methods:The expression levels of long non-coding RNA(lncRNA)DPP10-AS1 were assessed using real-time quantitative polymerase chain reaction(RT-qPCR)within both the patient tissue specimens and glioblastoma cell lines.The relationship between lncRNA DPP10-AS1 expression in glioblastoma and patient prognosis was investigated.Cell Counting Kit-8(CCK-8),transwell,and clonogenic experiments were utilized to assess tumor cells’proliferation,invasiveness,and migratory potentials after lncRNA DPP10-AS1 expression was up or down-regulated.Using an online bioinformatics prediction tool,the intracellular localization of lncRNA DPP10-AS1 and its target miRNA were predicted,and RNA-FISH verified results.A dual-luciferase reporter experiment validated the relationship across miR-24-3p together with lncRNA DPP10-AS1.MiR-24-3p expression within glioblastoma was identified through RT-qPCR,and potential link across miR-24-3p and lncRNA DPP10-AS1 was assessed using Pearson correlation analysis.Moreover,influence from lncRNA DPP10-AS1/miR-24-3p axis upon glioblastoma cell progression was assessed in vivo via a subcutaneous xenograft tumor model.Results:The expression of lncRNA DPP10-AS1 was notably reduced in both surgical specimens of glioblastoma and the equivalent cell lines.Low level of lncRNA DPP10-AS1 in glioblastoma is following poor prognosis.The downregulation of lncRNA DPP10-AS1 in glioblastoma cells resulted in enhanced cellular proliferation,migration,and invasion capabilities,accompanied by downregulated E-cadherin and upregulated vimentin and N-cadherin.Additionally,the observed upregulation of lncRNA DPP10-AS1 demonstrated a substantial inhibitory function upon proliferation,invasion,and migratory capabilities of LN229 cells.Subcellular localization disclosed that lncRNA DPP10-AS1 had a binding site that interacted with miR-24-3p.Upregulated miR-24-3p was detected in glioblastomas,displaying an inverse correlation with lncRNA DPP10-AS1 expression.MiR-24-3p downstream target has been determined as chromodomain helicase DNA binding protein 5(CHD5).LncRNA DPP10-AS1 affected the invasion and proliferation of glioblastoma by controlling the miR-24-3p/CHD5 axis.Conclusion:The present study demonstrated that lncRNA DPP10-AS1 can inhibit the invasive,migratory,and proliferative properties of glioblastoma by regulating the miR-24-3p/CHD5 signaling pathway.Consequently,lncRNA DPP10-AS1 has potential as a tumor suppressor and might be utilized for accurate diagnosis and targeted treatments of glioblastomas.

体外循环下瓣膜置换术后急性呼吸窘迫综合征患者血清IGF-1 IL-6 IL-10的表达及临床意义

目的:探讨体外循环下瓣膜置换术后急性呼吸窘迫综合征患者血清IGF-1、IL-6、IL-10浓度水平及其与预后的相关性分析。方法:选取我院2016年12月至2020年12月行体外循环下瓣膜置换手术患者211例,依据患者术后是否发生急性呼吸窘迫综合征分为ARDS组和非ARDS组。分别于麻醉诱导后体外循环前、体外循环后2h、6h、12h、24h(记为T1-T5)采集患者动脉血气分析,计算氧合指数(oxygenation index,OI);并于T1~T5时刻采集患者静脉血,应用ELISA法测定血清IGF-1、IL-6及IL-10浓度,分析术后患者血清IGF-1、IL-6及IL-10的变化趋势及对术后急性呼吸窘迫综合征的影响。结果:ARDS组体外循环下瓣膜置换术后患者IGF-1、IL-6、IL-10血清浓度明显高于术前水平,且于术后24h内呈上升趋势;ARDS组患者术后12h、24h时IGF-1、IL-6、IL-10血清浓度较非ARDS组均明显升高(P<0.05)。ARDS组,将CPB下瓣膜置换术后24h时细胞因子浓度水平与术后24h时OI进行Pearson相关性分析,结果发现CPB术后24h时IGF-1浓度与术后24h时OI有相关性(r=0.808,P<0.001);CPB术后24h时IL-6浓度与术后24h时OI有相关性(r=0.737,P=0.001)。结论:体外循环下瓣膜置换术后出现急性呼吸窘迫综合征患者IGF-1、IL-6、IL-10血清浓度水平较未出现者明显升高,IGF-1、IL-6、IL-10血清浓度与体外循环瓣膜置换术后急性呼吸窘迫综合征的发生发展有密切关系,对预测体外循环下瓣膜置换术后并发急性呼吸窘迫综合征有一定指导意义。

利用苏云金芽胞杆菌转座子Tn4430构建含cry1 Ac10基因的解离载体

将cry1Ac1 0基因和苏云金芽胞杆菌的复制起始区连接在一起 ,并在其两侧按相同方向各连接一个来自苏云金芽胞杆菌转座子Tn4430的解离位点 ,构成转移单位。再将革兰氏阳性细菌的抗性标记基因和大肠杆菌克隆载体 pUC1 9与之连接 ,获得含cry1Ac1 0基因的解离载体pBMB80 1。将其转化苏云金芽胞杆菌无晶体突变体 ,再导入含解离酶基因的辅助质粒 pBMB1 2 0 0。在解离酶作用下 ,两个解离位点间发生重组 ,消除基在操作中的抗性标记基因等非必需基因片段 ,获得仅保留有完整cry1Ac1 0基因和来自苏云金芽胞杆菌质粒复制起始区 ,在无抗生素选择压力下能稳定遗传的重组质粒pBMB80 1B。

MRL 小鼠 IL-10R1 对 B 淋巴细胞功能影响的研究

目的:研究MRL小鼠IL-10R1对B淋巴细胞功能的影响。方法:分别将克隆有MRL小鼠和C57BL/6小鼠IL-10R1基因的载体转染至Ba/F3细胞稳定表达,经IL-10刺激后,用MTT法检测细胞增殖情况,用流式细胞术检测CD16/32和LECAM-1的表达情况。结果:随着IL-10的浓度增加,表达MRL IL-10R1的B细胞的增殖能力递增,而表达C57BL/6 IL-10R1的B细胞递减;接受IL-10刺激后表达MRL IL-10R1的B细胞CD16/32表达水平较表达C57BL/6 IL-10R1的B细胞低,LECAM-1表达水平前者却较后者高。结论:MRL小鼠IL-10R1丧失了对B细胞活化、增殖及趋向性迁移的抑制作用,这可能与系统性红斑狼疮的发生及发展有关。

外源CC10基因对肺腺癌A549细胞细胞周期蛋白D1 mRNA表达的影响

目的:研究外源性CC10基因对肺腺癌A549细胞细胞周期蛋白D1(CyclinD1)及其mRNA表达的影响。方法:用脂质体法将抑癌基因CC10转染到人肺腺癌细胞A549中8、16、24、32、48h后,用Western blot法观察CC10蛋白表达,观察细胞生长细胞克隆形成,用流式细胞仪观察细胞周期变化,用RT-PCR检测周期蛋白CyclinD1 mRNA的影响。结果:转染外源CC10基因对A549细胞生长具有抑制作用,细胞生长阻止于G0/G1期,CyclinD1 mRNA表达明显降低。结论:转染外源CC10基因对肺癌细胞G0/G1周期的抑制作用可能与CyclinD1基因表达下调有关。

雷公藤多甙和IL-10对人DC内IL-12p40和DCCK1 mRNA转录的影响

目的 :研究雷公藤多甙和IL 10对DC内IL 12p40和DC CK1转录的影响。方法 :通过GM CSF、IL 4和TNFα体外培养体系 ,从人外周血单个核细胞中诱导DC ,IL 12p40和DC衍生的趋化因子 1(DC CK1)转录采用逆转录多聚酶链反应 (RT PCR)技术。结果 :通过GM CSF、IL 4和TNFα体外培养体系可以获得成熟功能性DC ,雷公藤多甙和IL 10能抑制DC内IL 12p40mRNA的转录 ,但对DC CK1mRNA的转录无明显影响。结论 :雷公藤多甙、IL 10可能通过抑制IL 12p40mR