Sample preparation method considerations for integrated transcriptomic and proteomic analysis of tumors.

Area of Science:

• Oncology
• Molecular Biology
• Biochemistry

Background:

• Integrated multiomics analysis of tumors requires compatible RNA and protein recovery protocols.
• Tumor heterogeneity can impact transcriptomic and proteomic data consistency.

Purpose of the Study:

• To compare two RNA and protein isolation methods for multiomics analysis of tumor tissues.
• To determine the optimal method for preserving transcriptomic and proteomic concordance.

Main Methods:

• Comparison of sequential (Method 1) versus parallel (Method 2) RNA and protein extraction from laryngopharyngeal tumor tissues.
• RNA sequencing (RNA-seq) and iTRAQ-based LC-MS/MS analysis of extracted samples.

Main Results:

• Method 1 yielded a higher number of concordant differentially expressed transcripts and proteins compared to Method 2.
• Sequential extraction from a single tissue section (Method 1) captured more concordant entities, highlighting tissue heterogeneity.

Conclusions:

• Method 1, involving sequential RNA and protein isolation from the same tissue section, is superior for integrated transcriptome and proteome analysis.
• This method enhances the reliability of multiomics data by accounting for molecular distribution heterogeneity.