当前位置： SCI文献检索 > JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS期刊下所有文献 > Preparation of fluorescent labeled gentamicin as biological tracer and its characterization by liquid chromatography and high resolution mass spectrometry.

Preparation of fluorescent labeled gentamicin as biological tracer and its characterization by liquid chromatography and high resolution mass spectrometry.

Abstract：

:This work deals with the preparation of single-labeled bioconjugates of the antibiotic Gentamicin (GT) with the sulforhodamine-derived fluorescence dye Texas Red(®)-X (TR), its purification by high-performance liquid chromatography (HPLC) and its characterization by high-resolution mass spectrometry. Aminoglycosides such as GT are efficient antibiotics, but also problematic due to severe side effects such as nephro- and ototoxicity. Fluorescent labeled GT is used to visualize cellular uptake and distribution of the antibiotic to finally understand the mechanisms of serious adverse drug reactions. Pharmaceutically administered GT is a mixture of mainly four different components, which exhibit three (GT(C1)) or four (GT(C1a), GT(C2), GT(C2a)) primary amino functional groups which can be coupled with the labeling reagent TR. Thus, multiple labeling could be envisaged which was assumed to be detrimental for uptake studies by fluorescence imaging. The proposed synthesis aimed at preparation of single labeled product and together with the employed purification strategy indeed yielded single labeled GT as product. Analytical control of the reaction product was carried out by means of mass spectrometry (UHPLC-ESI-QTOF-MS/MS) to rule out over-labeling of GT, which would alter the physicochemical characteristics of GT and its cellular uptake significantly. Moreover, LC-MS/MS analysis gave valuable insights into structural diversity of single labeled products. Further, high-resolution MS and MS/MS spectra of underivatized GT are provided as well. The analytical information on preparation strategy and structure diversity is valuable for studies with a clinical focus on research of aminoglycoside toxicity. Furthermore, it is deemed to be useful for the development of LC-MS/MS assays for the determination of aminoglycosides or the fast screening of synthetic biology samples from biotechnological drug discovery.

journal_name

J Pharm Biomed Anal

journal_title

Journal of pharmaceutical and biomedical analysis

authors

Woiwode U,Sievers-Engler A,Lämmerhofer M

doi

10.1016/j.jpba.2015.12.053

subject

Has Abstract

pub_date

2016-03-20 00:00:00

pages

307-315

eissn

0731-7085

issn

1873-264X

pii

S0731-7085(15)30318-6

journal_volume

121

pub_type

杂志文章

在线工具

Preparation of fluorescent labeled gentamicin as biological tracer and its characterization by liquid chromatography and high resolution mass spectrometry.