CN105969337A - 一种罗丹明类衍生物的gsh荧光传感器、制备方法及应用 - Google Patents

一种罗丹明类衍生物的gsh荧光传感器、制备方法及应用 Download PDF

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CN105969337A
CN105969337A CN201610320134.0A CN201610320134A CN105969337A CN 105969337 A CN105969337 A CN 105969337A CN 201610320134 A CN201610320134 A CN 201610320134A CN 105969337 A CN105969337 A CN 105969337A
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包晓峰
陈海浪
舒海
吴小磊
李峰
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Abstract

本发明公开了一种罗丹明类衍生物的GSH荧光传感器、制备方法及应用,以罗丹明B为前体,通过两步反应合成目标产物1‑(2‑(3’,6’‑双(二乙氨基)‑3‑异吲哚啉‑1,9’‑[呫吨]‑2‑基)乙基‑1H‑吡咯‑2,5‑二酮。本发明通过将目标产物对GSH进行检测,发现其对GSH具有很好的检测效果,同时,本发明采用的原料易得,合成步骤简单,后处理亦很方便,较易实现大规模生产。

Description

一种罗丹明类衍生物的GSH荧光传感器、制备方法及应用
技术领域
本发明属于生物化学领域,具体涉及一种基于罗丹明B的GSH荧光传感器的制备及应用。
背景技术
谷光胱甘肽(GSH)是一种由三种氨基酸缩合而成的小分子肽,在调节细胞的各种功能方面发挥着至关重要的作用。它的主要生理作用是能够清除掉人体内的自由基,作为体内一种重要的抗氧化剂,保护许多蛋白质和酶等分子中的巯基。当GSH的含量异常时,则会带来许多健康方面的问题。例如:当体内GSH的含量偏低时,可能会引起肝损伤、艾滋病等疾病。另一方面,当GSH的含量高于正常值时,则会引起心血管疾病与阿尔茨海默病。鉴于GSH对人体如此至关重要,研究一种能够快速方便检测GSH的方法具有十分重要的意义。
目前,检测GSH的方法主要有:分光光度法、荧光法、高效液相色谱(HPLC)法、高效毛细管电泳法(HPCE)、流式细胞仪法等,然而这些方法存在很多缺点,如所需仪器价格较为昂贵费时,携带不便,敏感性差,所测定的GSH浓度范围不大,对于含GSH量较小的细胞中测量则更是困难等。与此相反,由于化学发光不需要任何光源,因而在对荧光探针进行化学发光成像检测时,不存在荧光检测或者荧光成像时不可避免的光学背景的干扰,从而可以获得更低的检出限。
罗丹明类染料由于其摩尔吸光系数较大,荧光量子产率高、光谱性能优越、结构简单、易于修饰、吸收波长范围广等优势,已经被广泛应用与分子探针设计,目前,罗丹明类分子探针多用于检测Al3+,Cr3+,GSH等。
文献1(Liu X,Zhang W,Li C,et al.Nanomolar detection of Hcy,GSH and Cys inaqueous solution,test paper and living cells[J].Rsc Advances,2014,7:4941-4946.)报道了一种利用萘酰亚胺类衍生物和磺酰氯进行缩合,合成出一种新型的GSH传感器的方法,产率54.8%,但是,其选择性不是特别好,对Hcy、Cys也有响应,而且效果和GSH相当。
文献2(Kim G J,Lee K,Kwon H,et al.Ratiometric Fluorescence Imaging of CellularGlutathione[J].Organic Letters,2011,13(11):2799-2801.)报道了一种1,1’-联萘衍生物和马来酸酐进行缩合,合成出一种新型的GSH传感器的方法,产率39%,由于缓冲溶液浓度过低,只有0.1mM,很难保在中性条件下进行测试。
发明内容
本发明目的是提供一种罗丹明类衍生物的GSH荧光传感器、制备方法及应用。
实现本发明目的的技术解决方案是:
一种基于罗丹明B的GSH荧光传感器,该荧光传感器的结构如下:
本发明中基于罗丹明B的GSH荧光传感器的制备方法,包括以下步骤:
第一步,将马来酸酐加入到含有化合物1的三氯甲烷体系中,回流反应,反应结束后,冷却至于室温,减压除去溶剂,萃取,硅胶柱分离、真空干燥得到化合物2;其中,化合物1的结构如下:
第二步,将化合物2加入到含有乙酸钠的乙酸酐体系中,升温至100±10℃反应,反应结束后冷却至室温,减压除去溶剂,萃取,硅胶柱分离最后得到所述GSH荧光传感器;其中,化合物2的结构如下:
进一步的,第一步中,化合物1是将罗丹明B与过量的乙二胺在无水乙醇中加热回流过夜,反应结束后,减压除去溶剂,萃取,硅胶柱分离后得到。
进一步的,第一步中,化合物1与马来酸酐的摩尔比为1:1.5-2.5,反应时间为10h以上。
进一步的,第一步中,硅胶柱分离中的洗脱液为MeOH:CH2Cl2=1:100。
进一步的,第二步中,乙酸钠的添加量为化合物2的0.3-1eq.。
进一步的,第二步中,硅胶柱分离中的洗脱液为MeOH:CH2Cl2=1:49。
本发明中所述的基于罗丹明B的荧光传感器用于检测细胞的谷光胱甘肽。
本发明与现有技术相比,其显著优点是:(1)本发明以罗丹明为主体合成了一种新型GSH荧光传感器,具有良好的光稳定性,长波长发射以及量子产率高等优点。(2)本发明所选用原料成本低,合成步骤简单,后处理亦很方便,较易实现大规模生产。(3)本发明采用酸酐与伯胺缩合反应方式,合成方法简单,反应条件温和,且产率较高。(4)本发明所涉及传感器能选择性检测GSH,且敏感度较高,在检测细胞内的GSH方面具有很大的应用前景。
附图说明
图1为本发明的化合物11H NMR。
图2为本发明的化合物113C NMR。
图3为本发明的化合物21H NMR。
图4为本发明的化合物213C NMR。
图5为本发明的目标化合物1H NMR。
图6为本发明的目标化合物13C NMR。
图7为本发明的目标化合物的紫外选择性测试图。
图8为本发明的目标化合物的荧光选择性测试图。
具体实施方式
(一)传感器化合物的合成
本发明提供了目标产物在GSH检测中的应用,发现其对GSH有很好的检测效果。本发明合成路线如下:
(二)荧光性能测试
将GSH、Cys、Hcy、Lys,Gly等不同氨基酸加入目标化合物的溶液中,进行荧光响应测试。
(三)紫外性能测试
将GSH、Cys、Hcy、Lys,Gly等不同氨基酸加入目标化合物的溶液中,吸光度光响应测试。
下面结合附图和具体实施例对本发明作进一步详细说明。
实施例1 荧光化学传感器的合成
1.化合物1的合成
将罗丹明B(960mg,2mmol)与乙二胺(1.3ml,20mmol)在无水乙醇(40ml)中,控制反应温度在80℃,反应时间为12h,反应完成之后,减压除去溶剂,萃取,经硅胶柱分离得到淡黄色固体即化合物1(880mg,92%)。化合物11H NMR,13C NMR分别如图1,图2所示。
2.化合物2的合成
将97.02mg(0.99mmol)的马来酸酐加入到3mL含有319.62mg(0.66mmol)化合物1的三氯甲烷体系中,回流反应20h,反应结束后,冷却至于室温,减压除去溶剂,萃取,经硅胶柱分离得到淡黄色固体即化合物1得到淡黄色的固体即化合物2(365mg,95%)。化合物11H NMR,13C NMR分别如图3,图4所示。
3.目标化合物的合成
将化合物2再次加入到溶有21.73mmg(0.26mmol)乙酸钠的乙酸酐体系中,升温至100℃反应2h,反应结束后冷却至室温,真空旋干溶剂。产物通过柱层析提纯得到293.28mg(78.79%)淡黄色产物即目标化合物。目标化合物1H NMR,13C NMR分别如图5,图6所示。
实施例2 紫外选择性能测试
目标化合物在甲醇中具有很好的溶解性,经验证,目标化合物可以溶解在MeOH:HEPES(1mM,pH=7.4)=1:2混合液中,配制500ml该溶液作为储备液(pH=7.2)。
精确配置目标化合物为1×10-3mol/LMeOH-H2O混合液(1/2,V/V),氨基酸GSH、Cys、Hcy、Lys、Gly等浓度为5×10-3mol/L水溶液,以及用MeOH:HEPES(1mM,pH=7.4,1/2,V/V)溶液。
紫外选择性实验如图7所示,取3ml储备液置于液体池中,加入30uL目标化合物,测其初始吸光度,然后分别加入配置好的各种氨基酸30uL,测量其稳定时的吸光度。观察图7可知,目标化合物对GSH有明显响应效果,在562nm处出现一个新峰,也即目标化合物对GSH有很好的选择性。
实施例3 荧光选择性能测试
目标化合物在甲醇中具有很好的溶解性,经验证,目标化合物可以溶解在MeOH:HEPES(1mM,pH=7.4)=1:2混合液中,配制500ml该溶液作为储备液(pH=7.2)。
精确配置目标化合物为1×10-3mol/LMeOH-H2O混合液(1/2,V/V),氨基酸GSH、Cys、Hcy、Lys、Gly等浓度为5×10-3mol/L水溶液,以及用MeOH:HEPES(1mM,pH=7.4,1/2,V/V)溶液。
荧光选择性实验如图8所示,取3ml储备液置于液体池中,加入30uL目标化合物,测其初始荧光强度值,然后分别加入配置好的各种氨基酸30uL,测量其稳定时的荧光强度。观察图8可知,目标化合物对GSH有明显响应效果,并且在580nm处荧光强度达到最大值,也即目标化合物对GSH有很好的选择性。

Claims (8)

1.一种基于罗丹明B的GSH荧光传感器,其特征在于,该荧光传感器的结构如下:
2.如权利要求1所述的基于罗丹明B的GSH荧光传感器的制备方法,其特征在于,包括以下步骤:
第一步,将马来酸酐加入到含有化合物1的三氯甲烷体系中,回流反应,反应结束后,冷却至于室温,减压除去溶剂,萃取,硅胶柱分离、真空干燥得到化合物2;其中,化合物1的结构如下:
第二步,将化合物2加入到含有乙酸钠的乙酸酐体系中,升温至100±10℃反应,反应结束后冷却至室温,减压除去溶剂,萃取,硅胶柱分离最后得到所述GSH荧光传感器;其中,化合物2的结构如下:
3.如权利要求2所述的制备方法,其特征在于,第一步中,化合物1是将罗丹明B与过量的乙二胺在无水乙醇中加热回流过夜,反应结束后,减压除去溶剂,萃取,硅胶柱分离后得到。
4.如权利要求2所述的制备方法,其特征在于,第一步中,化合物1与马来酸酐的摩尔比为1:1.5-2.5,反应时间为10h以上。
5.如权利要求2所述的制备方法,其特征在于,第一步中,硅胶柱分离中的洗脱液为MeOH:CH2Cl2=1:100。
6.如权利要求2所述的制备方法,其特征在于,第二步中,乙酸钠的添加量为化合物2的0.3-1eq.。
7.如权利要求2所述的制备方法,其特征在于,第二步中,硅胶柱分离中的洗脱液为MeOH:CH2Cl2=1:49。
8.如权利要求1-7任一所述的荧光传感器在检测谷光胱甘肽上的应用。
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