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Simultaneous metabolite MALDI-MSI, whole exome and transcriptome analysis from formalin-fixed paraffin-embedded tissue sections.
Lab. Invest. 102, 1400-1405 (2022)
Publ. Version/Full Text
Research data
DOI
PMC
Matrix-assisted laser desorption ionization mass spectrometry imaging (MALDI-MSI) allows spatial analysis of proteins, metabolites, or small molecules from tissue sections. Here, we present the simultaneous generation and analysis of MALDI-MSI, whole-exome sequencing (WES), and RNA-sequencing data from the same formalin-fixed paraffin-embedded (FFPE) tissue sections. Genomic DNA and total RNA were extracted from (i) untreated, (ii) hematoxylin-eosin (HE) stained, and (iii) MALDI-MSI-analyzed FFPE tissue sections from three head and neck squamous cell carcinomas. MALDI-MSI data were generated by a time-of-flight analyzer prior to preprocessing and visualization. WES data were generated using a low-input protocol followed by detection of single-nucleotide variants (SNVs), tumor mutational burden, and mutational signatures. The transcriptome was determined using 3’-RNA sequencing and was examined for similarities and differences between processing stages. All data met the commonly accepted quality criteria. Besides SNVs commonly identified between differently processed tissues, FFPE-typical artifactual variants were detected. Tumor mutational burden was in the same range for tissues from the same patient and mutational signatures were highly overlapping. Transcriptome profiles showed high levels of correlation. Our data demonstrate that simultaneous molecular profiling of MALDI-MSI-processed FFPE tissue sections at the transcriptome and exome levels is feasible and reliable.
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Publication type
Article: Journal article
Document type
Scientific Article
ISSN (print) / ISBN
0023-6837
e-ISSN
1530-0307
Journal
Laboratory Investigation
Quellenangaben
Volume: 102,
Issue: 12,
Pages: 1400-1405
Publisher
Nature Publishing Group
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Translational Metabolic Oncology (TMO)
CCG Personalized Radiotherapy in Head and Neck Cancer (KKG-KRT)
Research Unit Analytical Pathology (AAP)
CCG Personalized Radiotherapy in Head and Neck Cancer (KKG-KRT)
Research Unit Analytical Pathology (AAP)
Grants
Projekt DEAL