Raman Spectroscopy: An Exploratory Study to Identify Post-Radiation Cell Survival.

Area of Science:

• Biophysics
• Cancer Biology
• Spectroscopy

Background:

• Radiotherapy resistance is a major challenge in cancer treatment.
• Early detection of radiosensitivity is crucial for effective cancer therapy.

Purpose of the Study:

• To evaluate Raman spectroscopy as a rapid assay for predicting cancer cell radiosensitivity.
• To compare Raman spectroscopy with conventional assays like MTT and clonogenic assays.

Main Methods:

• Cancer cell lines (MCF7, ITOC-03, HEK293) were irradiated.
• Cell viability was assessed using MTT assay.
• Raman spectroscopy and principal component linear discriminant analysis (PC-LDA) were used to analyze spectral changes.
• Colony-forming capability was evaluated by clonogenic assay.

Main Results:

• MTT assay showed limited differentiation in cell viability 24 hours post-irradiation.
• Clonogenic assay and PC-LDA analysis of Raman spectra demonstrated correlating patterns of radiosensitivity.
• Raman spectra of irradiated cells showed altered nucleic acid features and enhanced cytochrome peaks.
• PC-LDA classified MCF7 as radioresistant and ITOC-03/HEK293 as radiosensitive.

Conclusions:

• Raman spectroscopy is a feasible and rapid alternative assay for identifying cancer cell radiosensitivity.
• The technique offers a faster prediction compared to the gold standard clonogenic assay.
• Spectral changes in irradiated cells provide insights into cellular response to radiation.