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- W2918185931 abstract "Hydrogen sulfide (H2S) is emerging as an important gasotransmitter in both physiological and pathological states. Rapid measurement of H2S remains a challenge. We report a microfluidic method for rapid measurement of sulphide in blood plasma using Dansyl-Azide, a fluorescence (FL) based probe. We have measured known quantities of externally added (exogenous) H2S to both buffer and human blood plasma. Surprisingly, a decrease in FL intensity with increase in exogenous sulphide concentration in plasma was observed which is attributed to the interaction between the proteins and sulphide present in plasma underpinning our observation. The effects of mixing and incubation time, pH, and dilution of plasma on the FL intensity is studied which revealed that the FL assay required a mixing time of 2 min, incubation time of 5 min, a pH of 7.1 and performing the test within 10 min of sampling; these together constitute the optimal parameters at room temperature. A linear correlation (with R2 ≥ 0.95) and an excellent match was obtained when a comparison was done between the proposed microfluidic and conventional spectrofluorometric methods for known concentrations of H2S (range 0-100 µM). We have measured the baseline level of endogenous H2S in healthy volunteers which was found to lie in the range of 70 μM - 125 μM. The proposed microfluidic device with DNS-Az probe enables rapid and accurate estimation of a key gasotransmitter H2S in plasma in conditions closely mimicking real time clinical setting. The availability of this device as at the point of care, will help in understanding the role of H2S in health and disease." @default.
- W2918185931 created "2019-03-11" @default.
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- W2918185931 date "2019-03-01" @default.
- W2918185931 modified "2023-10-16" @default.
- W2918185931 title "Rapid measurement of hydrogen sulphide in human blood plasma using a microfluidic method" @default.
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- W2918185931 doi "https://doi.org/10.1038/s41598-019-39389-7" @default.
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