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A Sphingolipidomic Profiling Approach for Comparing X-ray-Exposed and Unexposed HepG2 Cells.

Martina Moggio¹, Bahar Faramarzi², Marianna Portaccio¹

¹Department of Experimental Medicine, University of Campania "Luigi Vanvitelli", 80138 Naples, Italy.

International Journal of Molecular Sciences

|August 12, 2023

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This summary is machine-generated.

This study introduces a mass spectrometry method to analyze sphingolipids in liver cancer cells. It reveals how X-ray therapy impacts these lipids, offering insights into cancer treatment and lipidomics.

Area of Science:

Biochemistry
Analytical Chemistry
Cancer Research

Background:

Sphingolipids play crucial roles in cellular processes, including cancer growth.
Understanding lipid changes during cancer therapy is vital for treatment optimization.
Hepatocellular carcinoma (HCC) is a common liver cancer with complex lipid profiles.

Purpose of the Study:

To develop and validate an analytical method for sphingolipidomic profiling of hepatocellular carcinoma (HCC) cells.
To compare different lipid extraction protocols for optimal sample preparation.
To investigate the impact of X-ray irradiation on sphingolipid profiles in HCC cells.

Main Methods:

Lipid extraction protocols were compared for efficiency, specificity, and reproducibility using Fourier-transform infrared spectroscopy.

Keywords:

HepG2 cells X-ray extraction methods mass spectrometry sphingolipidomics

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Electrospray ionization tandem mass spectrometry (ESI-MS/MS) was used to analyze lipid extracts.

Mass spectrometry-based shotgun sphingolipidomics was employed for detailed lipid profiling.

Main Results:

A chloroform/methanol/water extraction protocol was identified as optimal for sphingolipid analysis.
Significant changes in sphingolipid profiles were observed in X-ray-irradiated HCC cells compared to unexposed cells.
The study demonstrated the utility of lipidomics in evaluating cellular responses to radiotherapy.

Conclusions:

The proposed mass spectrometry-based shotgun sphingolipidomics method is effective for characterizing lipid extracts from HCC cells.
X-ray irradiation induces alterations in sphingolipid metabolism within HCC cells.
Lipidomic technologies provide valuable insights into the role of sphingolipids in cancer progression and response to radiotherapy.