Integrated Metabolomics and Transcriptomics Using an Optimised Dual Extraction Process to Study Human Brain Cancer...

Area of Science:

• Biochemistry
• Molecular Biology
• Cancer Research

Background:

• Untargeted metabolomics and transcriptomics integration improves pathway identification.
• Simultaneous extraction of metabolites and RNA from the same sample enhances data reliability.
• Ependymoma research requires efficient methods for multi-omics analysis.

Purpose of the Study:

• To optimize a simultaneous extraction method for metabolites/lipids and RNA from ependymoma cells.
• To compare the efficiency of four dual-extraction techniques against single-extraction methods.
• To validate the optimized method for biological applications in cell lines and tumor tissues.

Main Methods:

• Evaluated four dual-extraction techniques (cryomill/mirVana, cryomill-wash/Econospin, rotation/phenol-chloroform, Sequential/mirVana) using methanol:water:chloroform ratios.
• Compared RNA and metabolite/lipid recovery against established single-extraction kits (mirVana) and methods.
• Applied the optimized Sequential/mirVana method to serum-starved ependymoma cells and primary ependymoma tumor tissue.

Main Results:

• All tested methods extracted similar metabolites, but rotation/phenol-chloroform failed to extract lipids.
• Cryomill/mirVana and Sequential/mirVana yielded the highest RNA amounts (70% and 68% of mirVana kit alone).
• The Sequential/mirVana method proved most efficient overall, enabling detection of metabolites, lipids, and sufficient RNA from 10 mg of tumor tissue.

Conclusions:

• The optimized Sequential/mirVana method enables efficient simultaneous extraction of metabolites, lipids, and RNA.
• This dual-extraction approach enhances the study of gene-metabolite interactions in ependymoma.
• The method is applicable to both cell lines and limited amounts of primary tumor tissue for multi-omics analysis.