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Related Concept Videos

Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

2.0K
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
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Raman Spectroscopy Instrumentation: Overview01:26

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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
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An Organotypic High Throughput System for Characterization of Drug Sensitivity of Primary Multiple Myeloma Cells
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Raman spectroscopy differentiates between sensitive and resistant multiple myeloma cell lines.

Domenico Franco1, Sebastiano Trusso2, Enza Fazio3

  • 1Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Italy.

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
|June 24, 2017
PubMed
Summary

Single-cell micro-Raman spectroscopy distinguishes drug-resistant multiple myeloma cells by analyzing biomolecular spectral signatures. This noninvasive technique offers a new tool for detecting cancer and assessing drug resistance in clinical settings.

Keywords:
Drug resistanceMultiple myeloma cell linePCA analysisRaman spectroscopyRapid identification

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Area of Science:

  • Biomedical Spectroscopy
  • Molecular Diagnostics
  • Cancer Research

Background:

  • Current methods for identifying neoplastic cells lack specificity and can be biologically disruptive.
  • Distinguishing between drug-sensitive and drug-resistant cancer cells is crucial for effective treatment strategies.

Purpose of the Study:

  • To evaluate single-cell micro-Raman spectroscopy as a noninvasive method for discriminating between sensitive and resistant multiple myeloma cell lines.
  • To identify specific biomolecular spectral signatures indicative of drug resistance.
  • To explore the potential of micro-Raman spectroscopy as a clinical tool for assessing myeloma drug resistance.

Main Methods:

  • Utilized single-cell micro-Raman spectroscopy to analyze two multiple myeloma cell lines (MM.1S, U266B1) and their drug-resistant counterparts (MM.1R, U266/BTZ-R).
  • Investigated biomolecular spectral signatures, including DNA/RNA ratios, nucleic acids, lipids, and protein concentrations.
  • Applied principal component analysis (PCA) for classification of sensitive and resistant cell populations.

Main Results:

  • Single-cell micro-Raman spectroscopy successfully discriminated between sensitive and resistant multiple myeloma cell lines based on reproducible spectral signatures.
  • Characteristic spectral peaks related to molecular composition (DNA/RNA, nucleic acids, lipids, proteins) enabled subtype differentiation.
  • Principal component analysis demonstrated distinct clustering of sensitive and resistant cells using two principal components.

Conclusions:

  • Micro-Raman spectroscopy provides an accurate, noninvasive method for cancer detection and characterization in research and clinical settings.
  • The technique can identify drug-resistant myeloma cells by analyzing their unique spectral fingerprints.
  • Confocal micro-Raman spectroscopy is proposed as a clinical tool to monitor the development of resistance to glucocorticoids and proteasome inhibitors in multiple myeloma.