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Lactate based optical screening of dengue virus infection in human sera using Raman spectroscopy

机译:拉曼光谱法基于乳酸的人血清中登革病毒感染的光学筛选

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摘要

This study presents the screening of dengue virus (DENV) infection in human blood sera based on lactate concentration using Raman spectroscopy. A total of 70 samples, 50 from confirmed DENV infected patients and 20 from healthy volunteers have been used in this study. Raman spectra of all these samples have been acquired in the spectral range from 600 cm−1 to 1800 cm−1 using a 532 nm laser as an excitation source. Spectra of all these samples have been analyzed for assessing the biochemical changes resulting from infection. In DENV infected samples three prominent Raman peaks have been found at 750, 830 and 1450 cm−1. These peaks are most probably attributed to an elevated level of lactate due to an impaired function of different body organs in dengue infected patients. This has been proven by an addition of lactic acid solution to the healthy serum in a controlled manner. By the addition of lactic acid solution, the intense Raman bands at 1003, 1156 and 1516 cm−1 found in the spectrum of healthy serum got suppressed when the new peaks appeared around 750, 830, 925, 950, 1123, 1333, 1450, 1580 and 1730 cm−1. The current study predicts that lactate may possibly be a potential biomarker for the diagnosis of DENV infection.
机译:这项研究提出了基于拉曼光谱的乳酸浓度对人血血清中登革病毒(DENV)感染的筛选。这项研究共使用了70个样本,其中50个来自确诊的DENV感染患者,20个来自健康志愿者。使用532 nm激光作为激发源,在600 cm -1 至1800 cm -1 的光谱范围内获得了所有这些样品的拉曼光谱。已分析所有这些样品的光谱,以评估感染引起的生化变化。在受DENV感染的样品中,在750、830和1450 cm -1 处发现了三个突出的拉曼峰。这些峰值最可能归因于登革热感染患者不同身体器官功能受损导致的乳酸水平升高。通过以受控方式向健康血清中添加乳酸溶液已证明了这一点。通过添加乳酸溶液,当新峰出现在750、830、925、950附近时,在健康血清光谱中发现的1003、1156和1516 cm -1 的拉曼光谱带被抑制。 ,1123、1333、1450、1580和1730厘米 -1 。目前的研究预测,乳酸可能是诊断DENV感染的潜在生物标记。

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