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Reference gene validation for gene expression normalization in canine osteosarcoma: a geNorm algorithm approach.

Gayathri Thevi Selvarajah1,2, Floor A S Bonestroo3, Elpetra P M Timmermans Sprang3

  • 1Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, University of Utrecht, Yalelaan 104, 3584, CM, Utrecht, The Netherlands. gayathri@upm.edu.my.

BMC Veterinary Research
|November 28, 2017
PubMed
Summary
This summary is machine-generated.

This study validates reference genes for canine osteosarcoma (OS) research. RPS5 and RPS19 are recommended for primary tumors, ensuring reliable gene expression quantification in canine OS studies.

Keywords:
Bone tumorDogOsteosarcomaQuantitative real-time PCRReference genes

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Area of Science:

  • Veterinary Oncology
  • Molecular Biology
  • Gene Expression Analysis

Background:

  • Quantitative PCR (qPCR) requires stable reference genes for accurate mRNA quantification, especially in heterogeneous tumor tissues.
  • No reference genes have been validated for canine osteosarcoma (OS), a common bone cancer in dogs.
  • Previous canine OS studies used limited reference genes, potentially affecting data reliability.

Purpose of the Study:

  • To validate a panel of commonly used reference genes for normalizing gene expression data in canine osteosarcoma.
  • To identify the most stable reference genes and determine the optimal number for normalization in canine OS tumors and cell lines.
  • To establish standardized methods for reliable gene expression quantification in canine OS research.

Main Methods:

  • Quantitative PCR (qPCR) analysis of nine candidate canine reference genes.
  • Testing was performed on 40 snap-frozen primary canine osteosarcoma tumors and seven canine OS cell lines.
  • The geNorm algorithm was used to assess gene expression stability and determine optimal reference gene combinations.

Main Results:

  • RPS5 and HNRNPH demonstrated high stability in canine OS cell lines.
  • RPS5 and RPS19 were identified as the most stable combination for primary canine osteosarcoma tumors.
  • Pairwise variation analysis suggested four reference genes for primary tumors and two for cell lines for optimal normalization.

Conclusions:

  • Recommends specific reference gene combinations for normalizing mRNA levels in canine OS tumors and cell lines.
  • Standardized normalization is crucial for reliable quantification of target gene expression in canine OS.
  • Facilitates investigation of genes involved in canine OS metastasis and aids comparative biomarker discovery.