title: Biochemical fingerprints of human papillomavirus infection and cervical dysplasia using cervical fluids: Spectral pattern investigation.
abstract: The Pap smear is the primary screening tool for invasive cervical cancer resulting from a persistent infection with oncogenic human papillomavirus (HPV); however, there are the problems such as the inability to distinguish between HPV infection and cervical dysplasia and a low sensitivity remain. We present preliminary findings of a label-free method to detect and classify HPV infection and cervical dysplasia using human cervical fluids. Three experimental groups, defined as normal, HPV-positive, and cervical dysplasia, were evaluated through their Raman spectral patterns for noise-independence, high reproducibility, and uniformity. Clinical diagnosis was performed through liquid-based cervical cytology, HPV test, and cervical histologic examination. Healthy cervical fluids showed a strong Raman intensity at 877 cm-1(symmetric C-C stretching), and at 963 cm-1(phosphate), compared to a reference Raman peak at 1003 cm-1(phenylalanine symmetric ring breath). The HPV-positive cervical fluids showed a strong intensity of a Raman peak at 1448 cm-1corresponding to C-H deformation vibration mode and the highest similarity between the central and ring zones among the three groups. The cervical dysplasia fluids showed the presence of strong peaks compared to the control and HPV-positive groups. In addition, different Raman spectra were acquired according to HPV type. Therefore, all ranges of cervical fluid-induced Raman spectra could be used to detect the presence of cervical pre-cancer. Raman peak-gated assessment provides a label-free and nondestructive tool for the clinical diagnosis of HPV infection and cervical precancerous changes.
authors.affiliation: Department of Obstetrics and Gynecology, The Catholic University of Korea, Kyonggi-do, 11765, Korea.
authors.forename: Yeon-Hee
authors.initials: YH
authors.lastname: Kim
authors.affiliation: Department of Pulmonary and Critical Care Medicine, Kyung Hee University, Seoul, 02447, Korea.
authors.forename: Boksoon
authors.initials: B
authors.lastname: Chang
authors.affiliation: Department of Anesthesiology and Pain Medicine, Kyung Hee University, Seoul, 02447, Korea.
authors.forename: Jeong-Hyun
authors.initials: JH
authors.lastname: Choi
authors.affiliation: Department of Biomedical Engineering, College of Medicine, Kyung Hee University, Seoul, 02447, Korea. sigmoidus@khu.ac.kr.
authors.forename: Hun-Kuk
authors.initials: HK
authors.lastname: Park
authors.affiliation: Department of Biomedical Engineering, College of Medicine, Kyung Hee University, Seoul, 02447, Korea. medchoi@khu.ac.kr.
authors.forename: Samjin
authors.initials: S
authors.lastname: Choi
mesh_terms: D001826:Body Fluids / Q000737:chemistry / Q000821:virology; D002584:Cervix Uteri / Q000821:virology*; D005260:Female; D006801:Humans; D027383:Papillomaviridae / Q000737:chemistry / Q000648:ultrastructure; D030361:Papillomavirus Infections / Q000821:virology*; D013059:Spectrum Analysis, Raman; D002578:Uterine Cervical Dysplasia / Q000821:virology*
keywords: Raman spectroscopy; cervical dysplasia; cervical fluid; human HPV; vibrational mode