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Related Experiment Video

Updated: Mar 24, 2026

Preparation of Formalin-fixed Paraffin-embedded Tissue Cores for both RNA and DNA Extraction
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Optimization of gene expression microarray protocol for formalin-fixed paraffin-embedded tissues.

Nevin Belder1, Öznur Coşkun2, Beyza Doğanay Erdoğan3

  • 1Ankara University, Biotechnology Institute, Ankara, Turkey.

Genomics Data
|March 17, 2016
PubMed
Summary
This summary is machine-generated.

This study evaluates standard protocols for microarray gene expression profiling using formalin-fixed paraffin-embedded (FFPE) tissues. It provides a detailed dataset to establish a robust method for analyzing FFPE samples, crucial for linking molecular and clinical data.

Keywords:
FFPEGene expressionMicroarrayOptimization

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Area of Science:

  • Molecular Biology
  • Genomics
  • Biotechnology

Background:

  • Formalin-fixed paraffin-embedded (FFPE) tissues are valuable for retrospective studies due to long-term clinical follow-up.
  • Challenges exist in gene expression profiling of FFPE samples due to nucleic acid degradation and chemical modifications from formalin fixation.
  • Existing microarray analysis protocols for FFPE samples lack standardization.

Purpose of the Study:

  • To describe and present detailed microarray data for a standard protocol for gene expression profiling using FFPE tissue samples.
  • To evaluate different combinations of RNA preparation, labeling protocols, and array platforms for optimal FFPE microarray analysis.
  • To provide a dataset for comparative analysis to establish a robust protocol.

Main Methods:

  • Deparaffinization of FFPE tissue sections and RNA extraction.
  • Evaluation of four combinations of two different cRNA/cDNA preparation and labeling protocols.
  • Analysis using two different array platforms: Affymetrix Human Genome U133 Plus 2.0 and U133_X3P.
  • Data deposited in the Gene Expression Omnibus (GEO) database under accession number GSE73883.

Main Results:

  • Comparative analysis of four protocol combinations across two array platforms was performed.
  • The percentage of present calls was used as a metric to determine the best performing combination.
  • Detailed data is available for further analysis and protocol development.

Conclusions:

  • The study presents a comprehensive dataset and evaluation of protocols for gene expression profiling using FFPE samples.
  • The findings aim to contribute to the development of a standardized and efficient protocol for FFPE microarray analysis.
  • This work supports the use of FFPE tissues for linking molecular information with clinical outcomes.