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MMP-2 expression and correlation with pathology and MRI of glioma
Hui Zhang1, Yunxia Ma2, Haibao Wang1
1Department of Radiology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, P.R. China.
Abstract:
The expression of matrix metalloproteinase-2 (MMP-2) in brain glioma and its correlation with patients' clinicopathological characteristics and magnetic resonance imaging (MRI) features were investigated. A total of 104 patients with brain glioma admitted and treated in the First Affiliated Hospital of Anhui Medical University from June 2010 to September 2014 were randomly enrolled. MRI examination was performed before operation. Immunohistochemistry (IHC) was used to detect the expression levels of MMP-2 in brain glioma tissues and paired normal brain tissues after operation and to analyze the associations of MMP-2 expression with the clinicopathological characteristics of brain glioma and survival time of patients. The relationship between MMP-2 expression and preoperative MRI features of glioma was analyzed. The positive rate of MMP-2 expression in brain glioma was 73.08% (76/104), while that in paired normal brain tissues was only 12.5% (13/104), obviously lower than that in brain glioma tissues (P<0.05). The MMP-2 expression in the body of glioma was not related to the patients' sex, age, tumor location and pathological type (P>0.05), but there was a significant correlation with the tumor diameter and pathological grade of the patients (P<0.05). Analysis by Cox model suggested that tumor diameter, pathological grade and MMP-2 were independent prognostic factors for glioma (P<0.05). The overall survival (OS) of patients in the positive MMP-2 expression group was 16.4 months, while the OS in the negative MMP-2 expression group was 20.16 months, and the difference between the two groups was statistically significant (P<0.05). The positive expression of MMP-2 in glioma was closely related to the uniformity of MRI signal for tumor, tumor diameter, severity of peritumoral edema, degree of enhancement and pathological grade of tumor (P<0.05). MMP-2 is highly expressed in brain glioma, and it is a negative factor for prognosis. Therefore, the MRI manifestations of glioma can reflect to some extent the intensity of MMP-2 expression.
Insights
Matrix metalloproteinase-2 (MMP-2) is highly expressed in brain glioma, indicating a poorer prognosis. Its expression correlates with tumor characteristics and MRI findings, suggesting MRI can help assess MMP-2 levels in glioma patients.
Area of Science:
- Oncology
- Neuroscience
- Biochemistry
Background:
- Brain gliomas are primary brain tumors with variable prognoses.
- Matrix metalloproteinase-2 (MMP-2) is implicated in tumor invasion and progression.
- Understanding MMP-2 expression in glioma is crucial for prognostic assessment.
Purpose of the Study:
- To investigate the expression of MMP-2 in brain glioma tissues.
- To correlate MMP-2 expression with clinicopathological characteristics and MRI features.
- To evaluate MMP-2 as a prognostic factor for glioma patients.
Main Methods:
- 104 glioma patients were enrolled.
- Immunohistochemistry (IHC) was used to detect MMP-2 expression.
- Correlation analysis with clinicopathological data and MRI features was performed.
Main Results:
- MMP-2 expression was significantly higher in glioma tissues compared to normal brain tissues (73.08% vs 12.5%).
- MMP-2 expression correlated with tumor diameter and pathological grade, but not sex, age, or location.
- Positive MMP-2 expression was associated with shorter overall survival (16.4 months vs 20.16 months) and specific MRI findings.
Conclusions:
- MMP-2 is overexpressed in brain glioma and serves as an independent negative prognostic factor.
- Tumor diameter, pathological grade, and MMP-2 expression are key prognostic indicators.
- Preoperative MRI features can partially reflect MMP-2 expression intensity in gliomas.
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