High throughput screening of meningioma biomarkers using a tissue microarray.

Eriks A Lusis¹, Michael R Chicoine, Arie Perry

¹Division of Neuropathology, Washington University School of Medicine, Campus Box 8118, 660 South Euclid Ave, St. Louis, MO 63110, USA.

|June 28, 2005

Summary

Tissue microarray immunohistochemistry (TMA-IHC) efficiently assessed meningioma biomarkers. EMA, E-cadherin, and PDGFR-beta distinguish anaplastic meningiomas from hemangiopericytomas, aiding in meningioma diagnosis and understanding.

Area of Science:

Neuro-oncology
Pathology
Biomarker Discovery

Background:

Meningiomas exhibit diverse histology and clinical behavior.
Limited immunohistochemical markers exist for meningioma differentiation and progression.
Hemangiopericytomas (HPCs) share some features with meningiomas.

Purpose of the Study:

To evaluate a panel of potential meningioma biomarkers using high-throughput tissue microarray immunohistochemistry (TMA-IHC).
To identify markers that differentiate meningioma subtypes and correlate with clinical behavior.
To assess the utility of TMA-IHC for meningeal tumor biomarker analysis.

Main Methods:

Utilized a tissue microarray (TMA) with 41 meningiomas (all grades) and 9 HPCs.
Applied immunohistochemistry (IHC) for progesterone receptor (PR), EMA, cathepsin D, E-cadherin, PDGFR-beta, PDGF BB, survivin, EGFR, and VEGF.
Analyzed staining patterns and correlated them with tumor grade and clinical presentation.

Main Results:

EMA, E-cadherin, and PDGFR-beta staining differentiated anaplastic meningiomas from HPCs (P < 0.001, P = 0.02, P = 0.015).
PR and cathepsin D expression decreased with increasing tumor grade, consistent with prior studies.
PR and EGFR showed differential expression between symptomatic and incidental meningiomas.

Conclusions:

TMA-IHC is an accurate and efficient method for assessing meningeal tumor biomarkers.
EMA, E-cadherin, and PDGFR-beta are valuable for distinguishing anaplastic meningiomas from HPCs.
Incidental meningiomas exhibit slightly different expression patterns compared to surgically resected symptomatic counterparts.

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Area of Science:

Background:

Purpose of the Study:

Main Methods:

Main Results:

Conclusions:

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