Fluorescence detection of hyaluronidase.

Fluorescence detection of hyaluronidase.
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DOI:
10.1016/j.jphotobiol.2011.06.003
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发表时间:
2011-09-02
影响因子:
5.4
通讯作者:
Gryczynski, Lgnacy
Gryczynski, Lgnacy
中科院分区:
生物学2区
文献类型:
--
作者:
Fudala, Rafal;Mummert, Mark E.;Gryczynski, Zygmunt;Gryczynski, Lgnacy

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用荧光素胺和罗丹明B胺两种荧光团标记透明质酸(HA)。这两个荧光团适合于荧光(Foerster)共振能量转移(FRET),这会导致荧光素猝灭和罗丹明发射增强。这种标记的HA(HA-FRET)是一种潜在的HA降解传感器。我们研究了透明质酸酶(HA-ASE)存在和不存在的情况下HA-FRET的荧光性质。时间分辨荧光测量表明,在没有HA酶的情况下,FRET超过50%。在HA-ase存在下,FRET随着时间的延长而减少,荧光素和罗丹明的相对荧光强度向荧光素转移,表明FRET释放。HA酶消化HA的动力学依赖于酶的浓度。我们证明,同时测量HA-FRET的绿色和红色发射可以用于HA-ASE存在和活性的比率度量检测。这反过来又可用于构建坚固但可靠的HA-ASE传感设备。
We labeled hyaluronan (HA) with two fluorophores, fluorescein amine and rhodamine B amine. These two fluorophores are suitable for a fluorescence (Foerster) resonance energy transfer (FRET) which results in a fluorescein quenching and an enhanced rhodamine emission. Such labeled HA (HA-FRET) is a potential sensor for HA degradation. We studied fluorescence properties of HA-FRET in the absence and presence of hyaluronidase enzyme (HA-ase). The time-resolved fluorescence measurements indicate more than 50% of FRET in the absence of HA-ase. In the presence of HA-ase FRET decreases with time, and relative fluorescence intensities of fluorescein and rhodamine shifts to fluorescein indicating a release of FRET. The kinetics of the digestion process of HA by HA-ase depends on the concentration of the enzyme. We demonstrate that simultaneous measurements of green and red emission of HA-FRET can be used in ratio metric detection of the HA-ase presence and activity. This in turn, can be utilized for the construction of a robust but reliable HA-ase sensing device.
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