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Original Article
- Protein Phosphatase Magnesium-Dependent 1δ (PPM1D) Expression as a Prognostic Marker in Adult Supratentorial Diffuse Astrocytic and Oligodendroglial Tumors
- Hui Jeong Jeong, Chang Gok Woo, Bora Lee, Shin Kwang Khang, Soo Jeong Nam, Jene Choi
- J Pathol Transl Med. 2018;52(2):71-78. Published online October 18, 2017
- DOI: https://doi.org/10.4132/jptm.2017.10.21
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- 2 Web of Science
- 2 Crossref
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Abstract
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Supplementary Material - Background
Protein phosphatase magnesium-dependent 1δ (PPM1D) is a p53-induced serine/ threonine phosphatase, which is overexpressed in various human cancers. A recent study reported that a mutation in the PPM1D gene is associated with poor prognosis in brainstem gliomas. In this study, we evaluated the utility of PPM1D as a prognostic biomarker of adult supratentorial diffuse astrocytic and oligodendroglial tumors.
Methods
To investigate PPM1D protein expression, mRNA expression, and copy number changes, immunohistochemistry, RNAscope in situ hybridization, and fluorescence in situ hybridization were performed in 84 adult supratentorial diffuse gliomas. We further analyzed clinical characteristics and overall survival (OS) according to PPM1D protein expression, and examined its correlation with other glioma biomarkers such as isocitrate dehydrogenase (IDH) mutation, and p53 expression.
Results
Forty-six cases (54.8%) were PPM1D-positive. PPM1D expression levels were significantly correlated with PPM1D transcript levels (p= .035), but marginally with PPM1D gene amplification (p=.079). Patients with high-grade gliomas showed a higher frequency of PPM1D expression than those with low-grade gliomas (p <.001). Multivariate analysis demonstrated that PPM1D expression (hazard ratio [HR], 2.58; p=.032), age over 60 years (HR, 2.55; p=.018), and IDH1 mutation (HR, 0.18; p=.002) were significantly independent prognostic factors; p53 expression had no prognostic significance (p=.986). The patients with tumor expressing PPM1D showed a shorter OS (p=.003). Moreover, patients with tumor harboring wild-type IDH1 and PPM1D expression had the worst OS (p<.001).
Conclusions
Our data suggest that a subset of gliomas express PPM1D; PPM1D expression is a significant marker of poor prognosis in adult supratentorial diffuse astrocytic and oligodendroglial tumors. -
Citations
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Yaning Wang, Junlin Li, Yaning Cao, Wenlin Chen, Hao Xing, Xiaopeng Guo, Yixin Shi, Yuekun Wang, Tingyu Liang, Liguo Ye, Delin Liu, Tianrui Yang, Yu Wang, Wenbin Ma
Frontiers in Neuroscience.2023;[Epub] CrossRef - Metal-dependent Ser/Thr protein phosphatase PPM family: Evolution, structures, diseases and inhibitors
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Pharmacology & Therapeutics.2020; 215: 107622. CrossRef
- Characteristic analysis and identification of novel molecular biomarkers in elderly glioblastoma patients using the 2021 WHO Classification of Central Nervous System Tumors
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