Surface-enhanced Raman spectroscopic analysis of centrifugally filtered blood serum samples of hepatitis C patients

Author：Samra Shakeel a , Haq Nawaz a,* , Muhammad Irfan Majeed a,* , Nosheen Rashid b,* , Muhammad Rizwan Javed c , Ayesha Tariq a , Beenish Majeed a , Aafia Sehar a , Sania Murtaza a , Nimra Sadaf a , Gull Rimsha a , Imran Amin

ABSTRACT：Background: Raman spectroscopy is able to analyze non-invasively, disease related to body fluids. Objectives: For the qualitative and quantitative analysis of HCV serum samples surface-enhanced Raman spectroscopy (SERS) based method is developed. Method: Surface-enhanced Raman spectroscopy (SERS) technique is employed for analysis of filtrate portions of blood serum samples of hepatitis C virus (HCV) infected patients and healthy ones by using 50 kDa centrifugal filter device. The filtrate portions of the serum obtained in this way contain proteins smaller than 50 kDa and removal of bigger size protein which allows to acquire SERS spectral features of smaller proteins more effectively which are probably associated with Hepatitis C infection. Moreover, SERS spectral features of the filtrates of different level of viral load including low, medium and high viral loads are compared with SERS spectral features of the filtrate portions of healthy/control serum samples. SERS spectral data sets of different samples are further analyzed by using multivariate data analysis techniques such as principal component analysis (PCA) and partial least square regression (PLSR). Some SERS spectral features are solely observed in the filtrate portions of the serum samples of hepatitis C and their intensities are increased as the level of viral load increases and might be used for HCV diagnosis. Results: PCA was found helpful for differentiation of SERS spectral data sets of filtrate portions of the serum samples of hepatitis C and healthy persons. The PLSR model helped for the quantification of viral loads in the unknown serum samples with 99% accuracy.

Keywords：Surface-enhanced Raman spectroscopy Centrifugal filters of 50 kda Blood serum Hepatitis C Principal component analysis Partial least square regression analysis

关联产品：ATR8300-全自动对焦激光显微拉曼光谱扫描成像仪