简介:AbstractLeucine-rich repeats containing 4 (LRRC4, also named netrin-G ligand 2 [NGL-2]) is a member of the NetrinGs ligands (NGLs) family. As a gene with relatively high and specific expression in brain, it is a member of the leucine-rich repeat superfamily and has been proven to be a suppressor gene for gliomas, thus being involved in gliomagenesis. LRRC4 is the core of microRNA-dependent multi-phase regulatory loops that inhibit the proliferation and invasion of glioblastoma (GB) cells, including LRRC4/NGL2-activator protein 2 (AP2)-microRNA (miR) 182-LRRC4 and LRRC4-miR185-DNA methyltransferase 1 (DNMT1)-LRRC4/specific protein 1 (SP1)-DNMT1-LRRC4. In this review, we demonstrated LRRC4 as a new member of the partitioning-defective protein (PAR) polarity complex that promotes axon differentiation, mediates the formation and plasticity of synapses, and assists information input to the hippocampus and storage of memory. As an important synapse regulator, aberrant expression of LRRC4 has been detected in autism, spinal injury and GBs. LRRC4 is a candidate susceptibility gene for autism and a neuro-protective factor in spinal nerve damage. In GBs, LRRC4 is a novel inhibitor of autophagy, and an inhibitor of protein-protein interactions involving in temozolomide resistance, tumor immune microenvironment, and formation of circular RNA.
简介:Emissionquenchingof[Ru(bpy)2(4,4’-dcbpy)](PF6)2(1)bybenzenamine,4-[2-[5-[4-[4-dimethylamino]phenyl]-4,5-di-hydro-1-phenyl-1H-pyrazol-3-yl]-ethenyl]-N,N-dimetyl(2)or1,5-diphenyl-3-(2-phenothiazine)-2-pyrazoline(3)wasobserved.Measurementsoftheemissiondecayof1beforeandafteradditionof2or3bysinglephotoncountingtechniquecon-finnedtheobservations.Theemissionquenchingof1by2or3wassubmittedtoStern-Volmerequation.Itwascalculatedthatthequenchingrateconstants(kq)are5.5×109(mol/L)-1s-1for2and4.0×109(mol/L)-1s-1for3,respectively.Theseresultsindicatedacharacterofdynamicquenchingprocess.Thesinglet-stateof2or3wasalsoquenchedby1.ThequenchingbehaviorsdidnotconformtotheStern-Volmerequationandinvolvedbothstaticanddynamicquenchingprocesses.Theapparentquenchingrateconstant(kapp)wascalculatedtobe3×109(mol/L)-1fortheinteractionofexcited2with1,and1.2×109(mol/L)-1forthatofexcited3wit
简介:本周,余姚中国塑料城塑料原料市场出现剧烈震荡。周初,基本上是延接上周的迅猛涨势,把市场价格进一步推高,特别是ABS树脂等性塑料,市场气氛上升到近年来的最高峰。周二,市场上刮起一阵冷风,传出降价的消息,造成市场一阵恐慌,在个别小销售商中即出现在压价抛售现象。实际上这是空穴来风,因为由于前期的塑料原料价格上涨的速度太快,涨幅过大,作适当回调这在市场运营中是正常现象。而且目前市场基本面的形势仍然太好,尽管下游市场的支持力度相对较弱,但得到上游市场强有力的支撑,外盘坚挺,国际油价还在继续攀高,国内石化生产厂家并没有出台下调出厂价格的举措。因此,经过短暂的骚动后,下半周的市场已趋平稳。
简介:Therearemoreandmorecountriestoakeanefforttothestudiesofvanadiumalloyforfusionapplication.NIFSinJapanhasrecentlydevelopedan80kgheatV4Cr4Tialloy(NIFS-heat2)aftertheproductionofa500kgscaleV4Cr4TiinU.S.severalyearsago.PropertyevaluationofthealloyhasbeenputintoaninternationalcollaborationprogramunderthecoordinationofIEA(InternationalEnergyAgency).SWIPhasjoinedthecollabrationonthehydrogenembrittlementresistanceevaluationofthealloyt.
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简介:ThesinglecrystalgrowthofstoichiometrichostluminescentcrystalNa5Eu(WO4)4hasbeeninvestigated.UsingNa2WO4asaflux,theoptimumconditionstogrowapuresinglecrystalbyflux-slow-coolingmethodhavebeendetermined.Ahighopticalqualitysinglecrystalofdimention4.5mmhasbeengrown,whichisthelargestoneasweknowsofar.Themicro-hardnessofNa5Eu(WO4)4singlecrystalis3.46×103MPa.Itsrefractiveindexis1.81inwhitelightwavelengthregionandthespecificgravityis5.65g/cm3.Thefluorescentandexcitationspectrahavebeendeterminedandthereasonofthefluorescentquenchof5D2and5D1to7FjofEu3+canbeexplainedasmulti-phononnon-radiationtransition.
简介:摘要目的研究生理及尿毒症状态下剪切力对静脉内皮细胞中,KLF2和eNOS表达的影响,探讨导致静脉内皮细胞功能紊乱的机制。方法分别在生理状态和尿毒症状态下,在平行板流动腔内模拟不同剪切力,用剪切力作用各组静脉内皮细胞4、12、24 h。采用免疫组化荧光染色技术和实时荧光定量PCR技术检测KLF2及eNOS的表达情况。结果在生理状态下,KLF2明显受剪切力作用调节,高强度剪切力和生理强度剪切力会上调KLF2的表达,而低强度剪切力和振荡剪切力会下调KLF2的表达,但随作用时间的延长,KLF2的表达也会有所上调。在尿毒症状态下,KLF2表达明显被抑制,即使再给予高剪切力作用,KLF2水平也不及正常生理状态;在低剪切力及振荡剪切力作用下,KLF2表达更明显地被抑制。KLF2主要在细胞核内表达,随着剪切力的作用,KLF2也在细胞质中表达,而eNOS主要在细胞质和细胞核内呈颗粒样表达。结论动静脉内瘘术后在尿毒症环境及振荡剪切力的多重因素作用下,KLF2和eNOS的表达受到抑制,可能是导致静脉内皮细胞功能紊乱、内膜增生、自体动静脉内瘘失功发生和发展的主要机制。