Journal
JOURNAL OF ADVANCED RESEARCH
Volume 27, Issue -, Pages 137-153Publisher
ELSEVIER
DOI: 10.1016/j.jare.2020.05.018
Keywords
Hydrogen sulfide H2S; in vivo detection; Fluorescent probes; Colorimetric probes; Chemiluminescent probes; Chromatographic bioanalysis; Chromatographic methods; Electrochemical sensors
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Funding
- Academy of Scientific Research and Technology, ASRT, Egypt [30]
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This article focuses on several analytical technologies used to determine H2S, including spectroscopic, chromatographic, and electrochemical methods. The advantages and limitations of each technique are highlighted, with special emphasis on their application for in vivo measurement of H2S (e.g., biofluids and tissues).
Background: Hydrogen sulfide (H2S) is currently considered among the endogenously produced gaseous molecules that exert various signaling effects in mammalian species. It is the third physiological gasotransmitter discovered so far after NO and CO. H2S was originally ranked among the toxic gases at elevated levels to humans. Currently, it is well-known that, in the cardiovascular system, H2S exerts several cardioprotective effects including vasodilation, antioxidant regulation, inhibition of inflammation, and activation of anti-apoptosis. With an increasing interest in monitoring H2S, the development of analysis methods should now follow. Aim of review: This review stages special emphasis on the several analytical technologies used for its determination including spectroscopic, chromatographic, and electrochemical methods. Advantages and limitations with regards to the application of each technique are highlighted with special emphasis on its employment for H2S in vivo measurement i.e., biofluids, tissues. Key Scientific Concepts and important findings of Review: Fluorescence methods applied for H2S measurement offer an attractive non-invasive and promising approach in addition to its selectivity, however they cannot be considered as H2S-specific probes. On the other hand, colorimetric assays are among the most common methods used for in vitro H2S detection, albeit their employment in vivo H2S measurement has not yet been possible. Separation techniques such as gas or liquid chromatography offer higher selectivity compared to direct spectrophotometric or fluorescence methods especially for suitable for endpoint H2S measurements i.e. plasma or tissue samples. Despite all the developed analytical procedures used for H2S determination, the need for highly selective, much work should be devoted to resolve all the pitfalls of the current methods. (C) 2020 The Authors. Published by Elsevier B.V. on behalf of Cairo University.
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