CN111116534B - 一种小分子探针cmsh以及制备方法及应用 - Google Patents
一种小分子探针cmsh以及制备方法及应用 Download PDFInfo
- Publication number
- CN111116534B CN111116534B CN201911165605.5A CN201911165605A CN111116534B CN 111116534 B CN111116534 B CN 111116534B CN 201911165605 A CN201911165605 A CN 201911165605A CN 111116534 B CN111116534 B CN 111116534B
- Authority
- CN
- China
- Prior art keywords
- cmsh
- clo
- probe
- fluorescence
- cio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003068 molecular probe Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000000523 sample Substances 0.000 claims abstract description 54
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 150000003384 small molecules Chemical class 0.000 claims description 32
- 150000002500 ions Chemical class 0.000 claims description 13
- 241000252212 Danio rerio Species 0.000 claims description 12
- 238000000799 fluorescence microscopy Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 7
- 238000002835 absorbance Methods 0.000 claims description 6
- 238000002798 spectrophotometry method Methods 0.000 claims description 4
- 230000005284 excitation Effects 0.000 claims description 2
- 239000012472 biological sample Substances 0.000 claims 3
- 102000004127 Cytokines Human genes 0.000 claims 1
- 108090000695 Cytokines Proteins 0.000 claims 1
- 238000000691 measurement method Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 238000003786 synthesis reaction Methods 0.000 abstract description 5
- 238000001308 synthesis method Methods 0.000 abstract description 4
- 241000283070 Equus zebra Species 0.000 abstract description 2
- GOLORTLGFDVFDW-UHFFFAOYSA-N 3-(1h-benzimidazol-2-yl)-7-(diethylamino)chromen-2-one Chemical group C1=CC=C2NC(C3=CC4=CC=C(C=C4OC3=O)N(CC)CC)=NC2=C1 GOLORTLGFDVFDW-UHFFFAOYSA-N 0.000 abstract 1
- 239000011159 matrix material Substances 0.000 abstract 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 14
- 210000004027 cell Anatomy 0.000 description 14
- 239000000243 solution Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 9
- 241000588724 Escherichia coli Species 0.000 description 7
- 230000008859 change Effects 0.000 description 7
- 238000003384 imaging method Methods 0.000 description 7
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 6
- 230000004044 response Effects 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 5
- 238000002189 fluorescence spectrum Methods 0.000 description 5
- XSXYESVZDBAKKT-UHFFFAOYSA-N 2-hydroxybenzohydrazide Chemical compound NNC(=O)C1=CC=CC=C1O XSXYESVZDBAKKT-UHFFFAOYSA-N 0.000 description 4
- QXAMGWKESXGGNV-UHFFFAOYSA-N 7-(diethylamino)-1-benzopyran-2-one Chemical compound C1=CC(=O)OC2=CC(N(CC)CC)=CC=C21 QXAMGWKESXGGNV-UHFFFAOYSA-N 0.000 description 4
- 238000003775 Density Functional Theory Methods 0.000 description 4
- 239000007850 fluorescent dye Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 210000001519 tissue Anatomy 0.000 description 3
- -1 ClO ion Chemical class 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- ZYGHJZDHTFUPRJ-UHFFFAOYSA-N coumarin Chemical compound C1=CC=C2OC(=O)C=CC2=C1 ZYGHJZDHTFUPRJ-UHFFFAOYSA-N 0.000 description 2
- 125000000332 coumarinyl group Chemical group O1C(=O)C(=CC2=CC=CC=C12)* 0.000 description 2
- 231100000135 cytotoxicity Toxicity 0.000 description 2
- 230000003013 cytotoxicity Effects 0.000 description 2
- 230000005281 excited state Effects 0.000 description 2
- 238000012632 fluorescent imaging Methods 0.000 description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N formaldehyde Substances O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- 230000005283 ground state Effects 0.000 description 2
- 238000011534 incubation Methods 0.000 description 2
- 238000001819 mass spectrum Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000010200 validation analysis Methods 0.000 description 2
- 238000001644 13C nuclear magnetic resonance spectroscopy Methods 0.000 description 1
- 238000005160 1H NMR spectroscopy Methods 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 231100000002 MTT assay Toxicity 0.000 description 1
- 238000000134 MTT assay Methods 0.000 description 1
- 210000001015 abdomen Anatomy 0.000 description 1
- 230000003187 abdominal effect Effects 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 229960000956 coumarin Drugs 0.000 description 1
- 235000001671 coumarin Nutrition 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005274 electronic transitions Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000001506 fluorescence spectroscopy Methods 0.000 description 1
- 239000001963 growth medium Substances 0.000 description 1
- 238000004770 highest occupied molecular orbital Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 description 1
- 210000001161 mammalian embryo Anatomy 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004776 molecular orbital Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000005311 nuclear magnetism Effects 0.000 description 1
- 210000003463 organelle Anatomy 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000007903 penetration ability Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical group OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000012764 semi-quantitative analysis Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000820 toxicity test Toxicity 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6402—Atomic fluorescence; Laser induced fluorescence
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/10—Non-macromolecular compounds
- C09K2211/1018—Heterocyclic compounds
- C09K2211/1025—Heterocyclic compounds characterised by ligands
- C09K2211/1088—Heterocyclic compounds characterised by ligands containing oxygen as the only heteroatom
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Immunology (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Optics & Photonics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
Abstract
本发明公开了一种小分子探针CMSH以及制备方法及应用,该探针母体为香豆素,该小分子探针可实现紫外与荧光精确检测ClO‑,可以用于检测溶液、活细胞以及斑马鱼中外源性的ClO‑,本发明合成方法简单,操作方便,不需要苛刻的条件,而且合成产率和纯度都很高,因此在ClO‑检测方面具有良好的应用前景。
Description
技术领域
本发明涉及荧光成像分子探针领域,尤其是涉及一种基于香豆素荧光成像技术检测ClO-的探针,具体涉及一种分子探针CMSH、其制备方法及应用。
背景技术
在目前为止所设计的分析方法中,荧光成像是检测离子的重要方法。然而,这种方法对样品的要求和工作环境上都有一定的局限性。此外,大多数探针的选择性和灵敏度都存在一定的限制,开发一种高选择性和灵敏性的探针是一种技术的挑战。为了深入了解深层荧光成像的相关信息,开发ClO-荧光成像成为了一种选择。但是,由于荧光强度大小存在差异,使得荧光成像的最大成像效果不是很理想,这种成像效果难以满足对生物体内进行观察的效果。例如,过量ClO-也可能导致一些副作用,在少量ClO-存在下,通过荧光成像难以检测到 ClO-。因此,开发一种监测ClO-浓度变化的有效方法非常重要。
最近,已经设计和合成了许多能够特异性鉴定ClO-的荧光探针,包括一些可以靶向亚细胞器的探针。然而大多数构建的ClO-探针是荧光增强或淬灭。与这种单发射波长变化的探头相比,比率型探头具有双波长发射特性,受环境因素的影响较小,响应范围广,精度高,可以实现半定量分析,已得到广泛应用。但是由于水溶性差与固有的毒性,目前报道的比率型探针限制了它们在生物中的应用。鉴于此,探究一种新的ClO-识别的探针具有深远的意义。
发明内容
针对现有技术存在的不足,本发明的目的在于提供一种高选择性和高灵敏度的ClO-识别荧光探针。
为实现上述目的,本发明提供一种小分子探针CMSH,所述分子探针分子式为C40H30N4O4,其结构式为:
本发明还提供上述小分子探针CMSH的制备方法,具体包括如下步骤:
向含7-(二乙氨基)-2-氧代-2H-亚甲基-3-甲醛的无水乙醇溶液制备混合溶液的体积摩尔浓度为0.05-0.1mol/L,加入2-羟基苯甲酰肼,混合反应,过滤后用乙醇洗涤得到产物,所述7-(二乙氨基)-2-氧代-2H-亚甲基-3-甲醛和2-羟基苯甲酰肼的摩尔比为:1:1-2。
作为本发明的进一步改进,所述7-(二乙氨基)-2-氧代-2H-亚甲基-3-甲醛和2-羟基苯甲酰肼的摩尔比为1:1
本发明还提供上述小分子探针CMSH检测、识别环境中或生物样品中ClO-的应用。
作为本发明的一种应用范围,所述小分子探针CMSH利用荧光成像检测正常细胞和细菌中外源性的ClO-的应用。
作为本发明的一种应用范围,所述小分子探针CMSH利用荧光成像检测斑马鱼体内外源性的ClO-的应用。
作为本发明的一种应用方式,通过紫外分光光度法,在波长348nm、456nm 处测定ClO离子溶液的吸光度,通过计算A 348nm/A 535nm的吸光度比率来测定ClO-离子的浓度。
作为本发明的一种应用方式,通过荧光分光光度法,以350nm为激发波长,在470nm、532nm的波长处测定ClO-离子溶液的荧光强度,通过计算F470/F532 的荧光发射强度比率来测定ClO-离子的浓度。
本发明具有如下优点:本发明的小分子探针对ClO-的荧光反应具有特异性,以两个不同发射波长处荧光强度的比值F470/F532为信号参量,提高了检测的特异性与灵敏度,实现荧光技术精确检测ClO-,并且具有有良好的生物相容性,可以检测活细胞和斑马鱼体内ClO-。因此在ClO-检测方面具有良好的应用前景。同时,本发明的合成方法简单、操作方便,不需要苛刻的条件。
附图说明
图1a为小分子探针对ClO-的理论结合图,图1b为实施例1中合成小分子探针的路线图;
图2a为实施例2中小分子探针对ClO-识别的紫外光谱图,2b为小分子探针对ClO-识别的荧光光谱图;
图3a为实施例2中的小分子探针对不同浓度ClO-识别的紫外光谱图,3b 为小分子探针对不同浓度ClO-识别的荧光光谱图,3c为小分子探针A348/A456 比值随着不同浓度ClO-的变化,3d为小分子探针F470/F532比值随着不同浓度 ClO-的变化;
图4a为实施例3中小分子探针基于时间变化对ClO-识别的荧光光谱图,4b 为实施例3中小分子探针基于不同pH对ClO-识别的荧光光谱图;
图5为实施例3中验证小分子探针对ClO-选择性;
图6为实施例4中小分子探针在正常细胞中检测外源性的ClO-;
图7为实施例4中小分子探针在大肠杆菌中检测外源性的ClO-;
图8为实施例6中小分子探针在斑马鱼中检测外源性的ClO-;
图9为小分子探针结合ClO-前后的密度泛函理论计算图;
图10为小分子探针小分子探针的质谱图;
图11为小分子探针小分子探针的核磁氢谱图;
图12为小分子探针小分子探针的核磁碳谱图;
图13为实施例6中的CMSH的探针对MRC-5细胞的毒性测试结果图。
具体实施方式
下面将结合实施例和效果例对本发明做进一步的详述,而非限制本发明的范围。
实施例1合成小分子探针
向7-(二乙氨基)-2-氧代-2H-亚甲基-3-甲醛的(500mg,2.04mmol)的无水乙醇(EtOH,30mL)溶液中加入2-羟基苯甲酰肼(310mg,2.04mmol)。在室温下搅拌反应混合物20小时后,将反应混合物通过布氏漏斗过滤,并将滤饼用乙醇洗涤,得到657mg CMSH为橙色固体,产率:85%,通过质谱、核磁可以确定该产物即为目标小分子探针,如图10-12所示。
合成小分子探针的路线图和对ClO-结合模式图如图1所示,图1表示合成小分子探针的路线图,其中EtOH为乙醇。
1H NMR(600MHz,DMSO)δ11.96(s,2H),8.51(s,1H),8.39(s,1H),7.90(d, J=7.6Hz,1H),7.66(d,J=8.9Hz,1H),7.44(t,J=7.6Hz,1H),6.96(d,J=8.0Hz, 1H),6.94(d,J=7.5Hz,1H),6.77(d,J=7.6Hz,1H),6.58(s,1H),3.47(q,J=6.7 Hz,4H),1.14(t,J=6.7Hz,6H);
13C NMR(151MHz,DMSO)δ164.48,160.39,159.16,156.23,151.05,143.01,138.62,133.44,130.59,127.79,118.38,116.92,115.07,111.81,109.38,107.65, 95.99,43.85,11.94;
HRMS(ESI)m/z[M+1]+:Calcd for C21H22N3O4,380.1605,found,380.1603.
实施例2小分子探针对ClO-响应的紫外和荧光光谱
制备1mL小分子探针(10μM)的EtOH/H2O(v/v,1:19)溶液。1mM的ClO-溶液滴加到探针溶液中。
如图2(a)所示,加入ClO-(16当量)后,CMSH溶液的绿色立即变为无色,这可以通过肉眼用比色法将ClO-区分出来,荧光从绿色变为蓝色。为了检查 CMSH对ClO-的响应,进行了光谱滴定。如图3b所示,CMSH在456nm处显示明显的吸收带,在532nm处显示预期的发射带。随着ClO-浓度的增加,CMSH 在532nm处的荧光强度逐渐减弱,并在470nm处出现新的蓝移发射带。同时,当ClO-的浓度增加到16当量时,最大吸收波长从456nm变化到348nm,表明 CMSH的大π共轭物被ClO-破坏。此外,作用后的体系在(F470/F532)的比率值高达9.2倍,表明CMSH可用作ClO-的比率型荧光探针。
在相应系数的吸光度比(A348/A456)和ClO-浓度之间进行了线性校正,其测定范围为0-80μM,如图3c所示,通过绘制曲线,其计算公式为 y=0.011x+0.001(y表示ClO-浓度,x为读取的吸光度),校正系数较高(R2= 0.9728),表明CMSH可以用于定量检测ClO-浓度。此外,通过在0至80μM 的ClO-浓度下绘制相应的荧光强度比值(F470/F532)对ClO-浓度,如图3c所示,通过绘制曲线,其计算公式为y=0.031x-0.055(y表示ClO-浓度,x为读取的吸光度),可以获得良好的线性关系(R2=0.9716)。此外,CMSH可以响应低浓度的ClO-,检测限为128nM,与以前报道的ClO-比率式荧光探针相当。
实施例3验证小分子探针对ClO-响应的时间动力学研究和不同pH值条件下的荧光强度变化,
实验结果见图4(a、b)可以看出小分子探针对ClO-离子有很快的响应,且 CMSH结合ClO-离子荧光增强并达到值的时间在40s以内。在pH为2-8之间,探针以及探针与CMSH离子的复合物荧光都能够保持好现有的荧光强度。
实施例4验证小分子探针对ClO-选择性
将5μM CMSH用各种生物学相关的ROS处理,包括各种分析物(80μM)。如图5a所示,仅添加80μM ClO-会导致CMSH出现明显的颜色和荧光变化,这可以用肉眼观察到。但是,其他分析物(O2-,Cl-,NO2-,AcO-,CO3 2-,1O2, NO-,ONOO-,SO4 2-,OH-,S2O3 2-,Cys,GSH和H2O2)的荧光强度变化大小忽略不计。为了进一步了解CMSH对ClO-的选择性高于其他分析物,我们比较了CMSH对其他干扰物的荧光比率(F470/F532)差异。如图5b所示,该探针对ClO-的响应比其他分析物的荧光强得多。基于CMSH中C=N基团的裂解氧化,探针从溶液的颜色和对ClO-的荧光响应中表现出明显的色差,从而产生了蓝移发光的二乙氨基香豆素醛。在可见光和365nm紫外灯下,CMSH溶液的绿色仅在存在ClO-的情况下变为无色,荧光从绿色变为蓝色,通过裸眼和CMSH的荧光在存在其他分析物时可以很好地区分。其他分析物如图5c所示,在裸眼观察中并不能感受到荧光的明显差异。这些结果表明,CMSH可以识别ClO-,对其他生物分析物具有良好的选择性,在其他生物环境中具有潜在的检测ClO-的潜力。
实施例5中小分子探针识别ClO-理论计算研究
为了进一步了解探针的分子结构,荧光和吸收光谱的传感机理,对ClO-配位前后的CMSH的理论计算利用密度泛函理论(DFT)方法对离子进行了电子跃迁。如图9所示,提出了分子轨道图的CMSH和CMSH-ClO-配合物,CMSH 的基态电子云主要位于香豆素结构部分,当转移并分散到水杨酸结构部分时为激发态,表明探针结构中发生了分子内电荷转移(ICT)作用。如图9所示, CMSH的能级从HOMO(0.20102eV)到LUMO(0.08544eV)的水平为0.11558eV。然而,当ClO-离子与CMSH作用后,电子处于基态时电子云分布于整个香豆素结构中,而且处于激发态时电子云结构也是基本处于均匀分布,表明ClO-被阻断了分子探针中的ICT效应。此时反应后结构的能级为0.08992V。因此,与ClO-离子反应后整个分子结构的能量差降低了,从而导致从绿色到蓝色荧光信号的显着发射迁移。
实施例6小分子探针的在正常细胞中成像效果
通过MTT分析进行了CMSH的细胞毒性研究,结果显示,即使将80μM CMSH标准化24小时,仍有约80%的细胞仍然存活,结果如图13所示,这表明 CMSH具有较低的细胞毒性,可以进一步使用用于细胞成像实验。随后,为了证明该探针检测活细胞中外源性ClO-的能力,我们以对照组和治疗组进行了成像分析。如图6所示,在与5μM CMSH孵育20分钟后,MRC-5细胞呈现出清晰的细胞形态,其中绿色通道中的绿色荧光和蓝色通道中的非荧光。此外,将MRC-5细胞与5μM CMSH一起孵育,并分别用20μM,40μM和80μM ClO-进一步处理20 分钟,绿色荧光逐渐消失,蓝色荧光逐渐突出。随着ClO-浓度的增加,来自MRC-5 细胞的蓝色荧光变得更强,原始的绿色荧光逐渐消失。通过将蓝色通道图像与绿色通道图像介导,比例图像(蓝色/绿色)(图6d,6h,6l和6q)通过将蓝色通道图像(图6b,6f,6j和6o)与绿色通道图像(图6c,6g,6k和6p)来记录,这是加入ClO-后蓝色通道的突出运动。细胞成像结果表明,CMSH具有良好的细胞通透性,可以作为活细胞中ClO-的比例荧光成像。
实施例7小分子探针的在大肠杆菌中成像效果
采用CMSH通过荧光成像通过生物成像在大肠杆菌中检测ClO-。如图7所示,仅用5μM CMSH染色的大肠杆菌在大肠杆菌的绿色通道中显示出明显的荧光,而蓝色通道则没有荧光。分别添加20μM,40μM和80μM ClO-20分钟,绿色荧光中的大肠杆菌荧光逐渐消失,蓝色荧光逐渐突出,大肠杆菌的杆状形状从缩放区域中的荧光图案清晰可见。通过将蓝色通道图像(图7b,7f,7j和7o)与绿色通道图像(图7c,7g,7k和7p)来记录比例图像(F蓝色/F绿色)(图7d,7h,7l和7q),这是添加ClO-后蓝色通道的显着运动。这些结果证明CMSH可用于追踪大肠杆菌中的ClO-,这将是研究细菌中ClO-的生物转化的潜在工具。
实施例8小分子探针的在斑马鱼中成像效果
在图8中,斑马鱼在胚胎培养基中培养,并与游离探针CMSH(5μM)孵育20分钟以使CMSH渗透到斑马鱼的整个组织中,它们在斑马鱼腹部区域显示出可见的绿色荧光,这表明该探针能够穿透斑马鱼组织并发出荧光。用CMSH 预处理斑马鱼时,蓝色通道几乎没有发现荧光。此外,斑马鱼用CMSH预处理并用PBS洗涤三次,然后分别与20μM,40μM和80μM ClO-孵育20分钟,显示出明显的变化,绿色荧光逐渐消失,在斑马鱼的头和腹部蓝色荧光越来越突出。通过将蓝色通道图像(图8b,8f,8j和8o)与绿色通道图像(图8c,8g, 8k和8p)记录比例图像(F蓝色/F绿色)(图8d,8h,8l和8q)。其中加入 ClO-后蓝色通道有突出运动。这些结果表明CMSH具有较高的组织穿透能力,并且可以实现通过比例荧光显示斑马鱼中ClO-的可视化。
本发明所述的小分子探针可通过荧光光谱技术检测溶液中的ClO-。
本发明具有如下优点:通过本发明所述制备方法合成小分子探针,还可以实现紫外和荧光光谱法精确传感ClO-,并且可以快速、准确的检测细菌、正常细胞以及斑马鱼体内中外源性的ClO-。因此在ClO-检测方面具有良好的应用前景。同时,本发明的合成方法简单、操作方便,不需要苛刻的条件。
以上仅是本发明的优选实施方式,本发明的保护范围并不仅局限于上述实施例,凡属于本发明思路下的技术方案均属于本发明的保护范围。应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理前提下的若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (5)
2.根据权利要求1所述的小分子探针CMSH检测、识别环境中或生物样品中CIO-的应用,其特征在于,所述小分子探针CMSH利用荧光成像检测正常细胞和细菌中外源性的ClO-的应用。
3.根据权利要求2所述的小分子探针CMSH检测、识别环境中或生物样品中CIO-的应用,其特征在于,所述小分子探针CMSH利用荧光成像检测斑马鱼体内外源性的ClO-的应用。
4.根据权利要求1所述的小分子探针CMSH测定CIO-的检测方法,其特征在于,通过紫外分光光度法,在波长348nm、456nm处测定CIO离子溶液的吸光度,通过计算A348nm/A535nm的吸光度比率来测定CIO-离子的浓度。
5.根据权利要求1所述的小分子探针CMSH测定CIO-的检测方法,其特征在于,通过荧光分光光度法,以350nm为激发波长,在470nm、532nm的波长处测定C1O-离子溶液的荧光强度,通过计算F470/F532的荧光发射强度比率来测定CIO-离子的浓度。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201911165605.5A CN111116534B (zh) | 2019-11-25 | 2019-11-25 | 一种小分子探针cmsh以及制备方法及应用 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201911165605.5A CN111116534B (zh) | 2019-11-25 | 2019-11-25 | 一种小分子探针cmsh以及制备方法及应用 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN111116534A CN111116534A (zh) | 2020-05-08 |
CN111116534B true CN111116534B (zh) | 2022-05-24 |
Family
ID=70496636
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201911165605.5A Active CN111116534B (zh) | 2019-11-25 | 2019-11-25 | 一种小分子探针cmsh以及制备方法及应用 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN111116534B (zh) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113149974A (zh) * | 2021-03-18 | 2021-07-23 | 温州医科大学 | 一种小分子荧光探针、制备方法及其应用 |
CN113004238B (zh) * | 2021-03-19 | 2022-05-06 | 温州医科大学 | 一种多功能小分子荧光探针、制备方法及应用 |
CN113845503A (zh) * | 2021-11-08 | 2021-12-28 | 齐鲁工业大学 | 一种基于香豆素的铜离子荧光探针及其制备方法 |
CN114989146B (zh) * | 2022-04-05 | 2024-01-30 | 哈尔滨理工大学 | “开-关-开”型连续检测Cu(Ⅱ)和草甘膦的喹啉类荧光探针及其制备方法和应用 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110128388A (zh) * | 2019-05-29 | 2019-08-16 | 温州医科大学 | 一种以cs为荧光团的小分子荧光探针及其制备方法与应用 |
CN111233880A (zh) * | 2020-02-28 | 2020-06-05 | 江苏大学 | 一种极低背景荧光的高灵敏次氯酸根荧光探针的制备方法 |
CN112745287A (zh) * | 2020-12-30 | 2021-05-04 | 山西大学 | 一种荧光探针hm及其制备方法和应用 |
-
2019
- 2019-11-25 CN CN201911165605.5A patent/CN111116534B/zh active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110128388A (zh) * | 2019-05-29 | 2019-08-16 | 温州医科大学 | 一种以cs为荧光团的小分子荧光探针及其制备方法与应用 |
CN111233880A (zh) * | 2020-02-28 | 2020-06-05 | 江苏大学 | 一种极低背景荧光的高灵敏次氯酸根荧光探针的制备方法 |
CN112745287A (zh) * | 2020-12-30 | 2021-05-04 | 山西大学 | 一种荧光探针hm及其制备方法和应用 |
Non-Patent Citations (2)
Title |
---|
"Crystal structure of (E)-N"-((7-(diethylamino)-2-oxo-2H-chromen- 3-yl)methylene)-2-hydroxybenzohydrazide, C21H21N3O4";Lu Liang;《Zeitschrift fuer Kristallographie - New Crystal Structures》;20140211;第224卷(第3期);第413-414页 * |
"香豆素类OCl-/CN-/Cys比率荧光探针的合成及光谱性能研究";杨月婷;《湖南大学硕士学位论文》;20130215;第2章 * |
Also Published As
Publication number | Publication date |
---|---|
CN111116534A (zh) | 2020-05-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN111116534B (zh) | 一种小分子探针cmsh以及制备方法及应用 | |
Zhang et al. | Structurally characterized salamo-based mononuclear Cu (II) complex fluorogenic sensor with high selectivity for CN− and Cys-Cys | |
Wang et al. | A β-diketonate–europium (III) complex-based fluorescent probe for highly sensitive time-gated luminescence detection of copper and sulfide ions in living cells | |
Vanjare et al. | Novel rhodamine based chemosensor for detection of Hg2+: Nanomolar detection, real water sample analysis, and intracellular cell imaging | |
Zhang et al. | A ruthenium (II) complex–cyanine energy transfer scaffold based luminescence probe for ratiometric detection and imaging of mitochondrial peroxynitrite | |
Gao et al. | An ICT colorimetric chemosensor and a non-ICT fluorescent chemosensor for the detection copper ion | |
EP3096143B1 (en) | Iron(ii) ion detection agent and detection method using same | |
CN102746313A (zh) | 含1,2,4-三唑结构单元的罗丹明b酰肼衍生物及其制备方法与应用 | |
Liu et al. | Development of a mitochondria targetable ratiometric time-gated luminescence probe for biothiols based on lanthanide complexes | |
Li et al. | A reversible fluorescent chemosensor for selective and sequential detection of copper ion and sulfide | |
Hu et al. | A FRET approach for luminescence sensing Cr3+ in aqueous solution and living cells through functionalizing glutathione and glucose moieties | |
CN106243036A (zh) | 一种基于硫代碳酸酯快速高选择性识别汞离子的荧光探针 | |
CN110229165A (zh) | 上转换荧光探针罗丹明衍生物及其应用 | |
CN110818646B (zh) | 基于聚集诱导发光小分子荧光探针及其制备方法及应用 | |
Li et al. | “Turn-on” fluorescent probes based on Rhodamine B/amino acid derivatives for detection of Fe3+ in water | |
CN106146526B (zh) | 一种荧光探针化合物及其制备方法和用途 | |
CN107698557A (zh) | 基于吡啶联吡唑酰腙衍生物的荧光探针及其制备方法和应用 | |
Meng et al. | A novel glucosamine-linked fluorescent chemosensor for the detection of pyrophosphate in an aqueous medium and live cells | |
Karakuş et al. | A guanidinium modified rhodamine-based fluorescent probe for in vitro/vivo imaging of gold ions | |
CN113264954A (zh) | 一种用于检测过氧化氢的荧光探针分子及其制备方法 | |
Ma et al. | Design strategies and progress on xanthene-based fluorescent probe for metal ions | |
CN111518107B (zh) | pH比率型荧光探针SP-DCCH的制备方法及生物成像应用 | |
CN110950854A (zh) | 一种关-开型分子荧光探针cmtah及其制备方法与应用 | |
Liu et al. | A reversible rhodamine 6G-based fluorescence turn-on probe for Fe 3+ in water and its application in living cell imaging | |
Leng et al. | A highly sensitive and selective fluorescein-based Cu2+ probe and its bioimaging in cell |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |