Vol 28 No 3

Asian Journal of Physics Vol. 28 No 3, 2019, 153-157

Clinical prospect of vibrational spectroscopy for
detection of Oesophageal Cancer

Alex Dudgeon, Saleem Noor Mohamed, Max L Almond, Leanne Fullwood,

Oliver J Old, Nicholas Stone, Catherine Kendall, Hugh Barr

Biophotonics Research Unit, Gloucestershire Hospital Foundation, Gloucester, United Kingdom,

University of Exeter Exeter, Queen Elizabeth Hospital Birmingham

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The improvement in the outcome of oesophageal cancer requires early detection and accurate assessment of the stage of the cancer. Real time optical imaging using both Raman and infrared spectroscopy offer an important prospect for this to occur. This report discussess our studies for the early identification of early cancer and dysplasia (pervasive cancer)using these techniques. In addition, we have used Raman spectroscopy to identify involvement of the local lymph nodes that may contain metastatic cancer. In order to provide real time assessment optical probes have been built and are being tested. © Anita Publications. All rights reserved.

Keywords: Raman Spectroscopy, Infrared Spectroscopy, Oesophagus. Metastatic cancer

Total Refs : 5

1. Fitzgerald R C, Di Pietro M, Ragunath K, Ang Y, Kang J Y, Watson P, Trudgill N, Patel P, Kaye P V, Sanders S, O'Donovan M, Bird-Lieberman E, Bhandari

P, Jankowski J A, Attwood S, Parsons S L, Loft D, Lagergren J, Moayyedi P, Georgios L, de Caestecker John, British Society of Gastroenterology guideline

on the diagnosis and management of Barrett’s oesophagus, Gut, 63(2014)7; doi.org/10.1136/gutjnl-2013-305372

2. Bhat S, Coleman Helen G. Yousef F, Johnston Brian T, McManus Damian T, Gavin A T, Murray L J, Risk of Malignant Progression in Barrett’s Esophagus

Patients: Results from a Large Population- J Natl Cancer Inst,103(2011)1049-1057; doi.org/10.1093/jnci/djr203

3. Day J C C, Bennett R, Smith B, Kendall C, Hutchings J, Meaden G M, Born C, Yu S, Stone N, A miniature confocal Raman probe for endoscopic use,

Physics in Medicine & Biology, 54 (2009)7077-7087.

4. Almond L M, Hutchings J, Lloyd G, Barr H, Shepherd N, Day J, Stevens O, Sanders S, Wadley M, Stone N, Kendall C, Endoscopic Raman spectroscopy

enables objective diagnosis of dysplasia in Barrett’s Oesophagus, Gastrointestinal Endoscopy, 79(2014)37-45

5. Fullwood L, Ph D Thesis University of Exeter, Vibrational Spectroscopy for the Investigation of Cancerous Lymph Nodes, 2017

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Asian Journal of Physics Vol. 28 No 3, 2019, 159-175

Quantum chemical and molecular docking studies on biomolecule 5-Aminouracil

R Premkumar¹, S Christopher Jeyaseelan¹, W Kiefer², M A Palafox ³,
A Milton Franklin Benial¹ and V K Rastogi⁴

¹PG and Research Department of Physics, N M S S V N College, Madurai-625 019, Tamil Nadu, India.

² Institute for Physical and Theoretical Chemistry, University of Würzburg, Germany, and Eisingen Laboratory for Applied Raman Spectroscopy, Eisingen, Germany

³Departamento de Química-Física I, Facultad de Ciencias Químicas, Universidad Complutense,
Ciudad Universitaria, Madrid-28040, Spain.

⁴Indian Spectroscopy Society, KC 68/1, Old Kavinagar, Ghaziabad-201 002, India.

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The quantum chemical studies of 5-aminouracil (5-AU) molecule were performed by density functional theory calculations using Gaussian 09 program. In addition, molecular docking analysis of the molecule was carried out to evaluate the inhibitory nature of the molecule. In the present study, the molecular structure of the molecule was optimized by DFT/B3LYP method with 6-311++G (d,p) basis set using Gaussian 09 program. The frontier molecular orbitals and their related molecular properties were computed, which reveal that the molecule has higher chemical reactivity and stability. The density of states spectrum of the molecule was simulated to validate the FMOs results. The solvent effects on UV-Visible absorption spectra of the molecule were studied. The bathochromic shift and hyperchromic shift were observed going from the gas phase to solvent in the UV-Vis spectra. The first order hyperpolarizability of molecule was calculated, which is 4.51 times greater than the value of urea. The molecular electrostatic potential surface and local reactivity descriptors analysis predict the possible reactive sites of the molecule. The natural bond orbital analysis confirms the bioactive nature of the molecule. The molecular docking analysis shows that the good inhibitory nature of the 5-AU molecule against the human carbonic anhydrase I (hCA I) enzyme, which causes the glaucoma. These results pave the way for developing the effective therapies in the treatment of glaucoma. © Anita Publications. All rights reserved.

Keywords: 5-Aminouracil, DFT, FMOs, UV-Visible, NLO, MEP, Fukui functions, Molecular Docking; Glaucoma.

Total Refs : 46

ASIAN JOURNAL OF PHYSICS