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Assessing glycation-mediated changes in human cortical bone with Raman spectroscopy
Mustafa Unal1,2,3, Sasidhar Uppuganti1,3, Calen J Leverant4
1Department of Orthopaedic Surgery & Rehabilitation, Vanderbilt University Medical Center, Nashville, Tennessee.
Journal of Biophotonics
|March 26, 2018
Summary
Raman spectroscopy detects advanced glycation end-products (AGEs) in bone. Amide I spectral changes indicate AGE accumulation, offering a non-destructive method to assess bone quality.
Area of Science:
- Biomaterials Science
- Spectroscopy
- Biochemistry
Background:
- Advanced glycation end-products (AGEs) impact bone quality.
- Non-destructive methods for AGE assessment are needed.
- Raman spectroscopy (RS) is a potential tool for bone analysis.
Purpose of the Study:
- To test if Raman spectroscopy's amide I band shape changes with AGE accumulation in bone.
- To establish a non-destructive method for assessing AGEs in bone matrix.
Main Methods:
- Cadaveric cortical bone incubated in ribose/glucose solutions.
- Raman spectroscopy (RS) analysis with 830 nm laser.
- Biochemical assays for pentosidine and fluorescent AGEs.
Main Results:
- RS detected AGE accumulation, confirmed biochemically.
- Hyp/Pro ratio increased with glycation.
- Amide I sub-peak ratios decreased with glycation, indicating collagen changes.
Conclusions:
- Raman spectroscopy can detect AGE accumulation in bone.
- Amide I spectral changes correlate with AGEs and collagen structure.
- RS offers a non-destructive approach to evaluate AGEs in bone quality.
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