Journal
JOURNAL OF BIOPHOTONICS
Volume 11, Issue 3, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jbio.201700057
Keywords
anti-TNF alpha; ATR-FTIR; colitis; secondary structure; sera
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Funding
- Army Research Office [W911 NF-15-1-0018]
- Air Force Office of Scientific Research [55655-EL-DURIP]
- U.S. Department of Veterans Affairs [BX002526]
- National Institute of Diabetes and Digestive and Kidney Diseases [RO1DK071594]
- Crohn's and Colitis Foundation of America
- Molecular Basis of Diseases (MBD) program at Georgia State University
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There remains a great need for diagnosis of inflammatory bowel disease, for which the current technique, colonoscopy, is costly and also has risks for complications. Attenuated total reflectance Fourier transform infrared spectroscopy is a new screening technique to evaluate colitis. Using second derivative spectral deconvolution of the absorbance spectra, a full set of spectral markers were identified based on statistical analysis. Using this method, Amide I group frequencies, (specifically, alpha-helix to beta-sheet ratio of the protein secondary structure) were identified in addition to the previously reported glucose and mannose signatures in sera of chronic and acute mice models of colitis. We also used the same technique to demonstrate that these spectral markers (alpha-helix/beta-sheet ratio, glucose and mannose) are recovering to basal levels upon anti-TNF alpha therapy. Hence, this technique will be able to identify changes in the sera due to diseases.
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