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A Next-generation Tissue Microarray ngTMA Protocol for Biomarker Studies
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Canine Central Nervous System Neoplasm Phenotyping Using Tissue Microarray Technique.

I Spitzbarth1,2, F Heinrich1,2, V Herder1,2

  • 11 Department of Pathology, University of Veterinary Medicine Hannover Foundation, Hannover, Germany.

Veterinary Pathology
|January 7, 2017
PubMed
Summary
This summary is machine-generated.

Tissue microarrays enabled phenotyping of canine central nervous system (CNS) neoplasms. AQP4 and p75NTR show promise in distinguishing astrocytomas from oligodendrogliomas, aiding CNS tumor research.

Keywords:
aquaporin 4astrocytomacentral nervous systemdogshierarchical clusteringimmunohistochemistryneoplasiaoligodendrogliomap75 neurotrophin receptorperiaxinproteolipid proteintissue microarraytumor

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Area of Science:

  • Veterinary Pathology
  • Neuro-oncology
  • Immunohistochemistry

Background:

  • Tissue microarrays (TMAs) are efficient for high-throughput phenotyping.
  • Canine central nervous system (CNS) neoplasms require better diagnostic markers.
  • Understanding antigen expression aids in classifying canine brain tumors.

Purpose of the Study:

  • To evaluate antigen expression in canine CNS neoplasms using TMAs.
  • To identify novel diagnostic markers for canine gliomas.
  • To correlate marker expression with tumor type and grade.

Main Methods:

  • Investigated 97 canine CNS neoplasms using TMAs.
  • Phenotyped tumor cells with 28 antibodies.
  • Applied hierarchical clustering to analyze expression profiles.

Main Results:

  • Hierarchical clustering generally aligned with histologic diagnoses.
  • Astrocytomas and oligodendrogliomas showed differential expression of AQP4, p75NTR, GFAP, and S100 protein.
  • AQP4 and p75NTR emerged as potential discriminators between astrocytoma and oligodendroglioma.

Conclusions:

  • AQP4 and p75NTR are novel markers for differentiating canine astrocytomas and oligodendrogliomas.
  • p75NTR and proteolipid protein expression may correlate with malignant transformation in canine astrocytomas and oligodendrogliomas, respectively.
  • TMAs are valuable tools for rapid immunohistochemical characterization of canine CNS neoplasms.