Global proteome and phospho-proteome analysis of Merlin-deficient meningioma and schwannoma identifies PDLIM2 as a novel therapeutic target.

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Title: Global proteome and phospho-proteome analysis of Merlin-deficient meningioma and schwannoma identifies PDLIM2 as a novel therapeutic target.
Author(s): Bassiri, K
Ferluga, S
Sharma, V
Syed, N
Adams, CL
Lasonder, E
Hanemann, CO
Item Type: Journal Article
Abstract: Loss or mutation of the tumour suppressor Merlin predisposes individuals to develop multiple nervous system tumours, including schwannomas and meningiomas, sporadically or as part of the autosomal dominant inherited condition Neurofibromatosis 2 (NF2). These tumours display largely low grade features but their presence can lead to significant morbidity. Surgery and radiotherapy remain the only treatment options despite years of research, therefore an effective therapeutic is required. Unbiased omics studies have become pivotal in the identification of differentially expressed genes and proteins that may act as drug targets or biomarkers. Here we analysed the proteome and phospho-proteome of these genetically defined tumours using primary human tumour cells to identify upregulated/activated proteins and/or pathways. We identified over 2000 proteins in comparative experiments between Merlin-deficient schwannoma and meningioma compared to human Schwann and meningeal cells respectively. Using functional enrichment analysis we highlighted several dysregulated pathways and Gene Ontology terms. We identified several proteins and phospho-proteins that are more highly expressed in tumours compared to controls. Among proteins jointly dysregulated in both tumours we focused in particular on PDZ and LIM domain protein 2 (PDLIM2) and validated its overexpression in several tumour samples, while not detecting it in normal cells. We showed that shRNA mediated knockdown of PDLIM2 in both primary meningioma and schwannoma leads to significant reductions in cellular proliferation. To our knowledge, this is the first comprehensive assessment of the NF2-related meningioma and schwannoma proteome and phospho-proteome. Taken together, our data highlight several commonly deregulated factors, and indicate that PDLIM2 may represent a novel, common target for meningioma and schwannoma.
Publication Date: 18-Jan-2017
Date of Acceptance: 13-Jan-2017
ISSN: 2352-3964
Publisher: Elsevier
Start Page: 76
End Page: 86
Journal / Book Title: EBioMedicine
Volume: 16
Copyright Statement: © 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (
Keywords: Meningioma
Blotting, Western
Cell Line, Tumor
Cell Proliferation
Cells, Cultured
Chromatography, Liquid
LIM Domain Proteins
Microfilament Proteins
Microscopy, Confocal
Neurofibromin 2
Protein Interaction Maps
RNA Interference
Tandem Mass Spectrometry
Publication Status: Published
Conference Place: Netherlands
Open Access location:
Appears in Collections:Department of Medicine

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