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Updated: Jul 30, 2025
08:06
Addressing Practical Issues in Atomic Force Microscopy-Based Micro-Indentation on Human Articular Cartilage Explants
Published on: October 28, 2022
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Express Analysis of Cartilage Tissue Using Multivariate Analysis of IR Spectra
N Yu Ignatieva1, O L Zakharkina2, A P Sviridov3
1Associate Professor, Department of Physical Chemistry; Lomonosov Moscow State University, 1 Leninskie Gory, Moscow, 119991, Russia.
Sovremennye Tekhnologii V Meditsine
|May 14, 2023
Summary
This study developed a quantitative method using IR spectroscopy to determine collagen and chondroitin sulfate in cartilage. The technique offers a rapid, accurate analysis for diagnosing cartilage composition changes.
Area of Science:
- Biochemistry
- Spectroscopy
- Biomaterials Science
Background:
- Cartilage composition analysis is crucial for diagnosing diseases.
- Current methods for determining collagen and chondroitin sulfate are time-consuming and labor-intensive.
Purpose of the Study:
- To develop a diagnostic method for quantitative determination of main cartilage components.
- To utilize multivariate IR spectral analysis and classical chemical analysis for verification.
Main Methods:
- Infrared (IR) spectra of various cartilage types were obtained using attenuated total reflectance.
- Principal component regression (PCR) calibration technique was employed for spectral analysis.
- The ratio of collagen to chondroitin sulfate (Ksp) was determined and compared with chemical analysis (Kchem).
Main Results:
- IR spectra qualitatively reflect cartilage composition, with significant changes detectable after trypsinization.
- PCR analysis revealed compositional differences in degraded versus intact articular cartilage.
- Degraded cartilage showed a statistically significant decrease in chondroitin sulfate content.
Conclusions:
- IR spectrometric analysis with PCR accurately determines the ratio of collagen and glycosaminoglycans in cartilage.
- The proposed method is rapid, requires minimal sample preparation, and is suitable for analyzing numerous samples.
- This approach holds potential for non-invasive diagnostics of cartilage tissue.
Keywords:
IR spectroscopy with attenuated total reflectioncartilage tissuecollagenglycosaminoglycansprincipal component regression methodMore Related Videos
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