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Evaluation of invasiveness of astrocytoma using 1H-magnetic resonance spectroscopy: correlation with expression of matrix metalloproteinase-2

  • Diagnostic Neuroradiology
  • Published:
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Abstract

Introduction

Even low-grade astrocytomas infiltrate the entire brain, a feature that precludes their successful therapy. So to assess the invasive potential of astrocytoma is very important. The aim of this study was determine whether there is a significant correlation between the results of 1H-magnetic resonance spectroscopy (1H-MRS) and tumor invasive potential of astrocytoma, which is reflected by expression of matrix metalloproteinase-2 (MMP-2).

Methods

The 1H-MRS spectra of 41 histologically verified astrocytomas were obtained on a 3-T MR scanner. According to the World Health Organization classification criteria for central nervous system tumors, there were 16 low-grade astrocytomas (2 pilocytic astrocytomas, 14 grade II astrocytomas) and 25 high-grade astrocytomas (5 anaplastic astrocytomas, 20 glioblastomas).The choline/N-acetylaspartate (Cho/NAA) and choline/creatine (Cho/Cr) ratios were calculated. Of the 41 astrocytomas, 19 (8 low-grade and 11 high-grade) were analyzed immunohistochemically. Expression of MMP-2 was determined using streptavidin-peroxidase complex (SP) staining which was quantified by calculating its calibrated opacity density (COD) using an image analysis system. The correlations between metabolite ratios and the quantitative data from the immunohistochemical tests in the 19 astrocytomas were determined.

Results

The Cho/NAA and Cho/Cr ratios of high-grade astrocytoma were both significantly greater than those of low-grade astrocytoma (t = −6.222, P = 0.000; t = −6.533, P = 0.000, respectively). MMP-2 COD values of high-grade astrocytomas were also significantly greater than those of low-grade astrocytomas (t = −5.892, P = 0.000). There were strong positive correlations between Cho/NAA ratio and MMP-2 COD (r = 0.669, P = 0.002), and between Cho/Cr ratio and MMP-2 COD (r = 0.689, P = 0.001).

Conclusion

1H-MRS is helpful in evaluating the invasiveness of astrocytomas and predicting prognosis preoperatively by determining the Cho/NAA and Cho/Cr ratios.

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Conflict of interest statement

We declare that we have no conflict of interest.

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Authors and Affiliations

  1. Department of Radiology, Qilu Hospital, Shandong University, Wenhuaxilu 107, Jinan, 250012, China

    Kai Zhang, Chuanfu Li, Ying Liu, Xiangxing Ma, Xiangshui Meng & Dechao Feng

  2. Department of Pathology, Qilu Hospital, Shandong University, Wenhuaxilu 107, Jinan, 250012, China

    Li Li

  3. MRI Department, Anhui Provincial Hospital, Lujianglu 17, Hefei, 230001, China

    Ying Liu

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  1. Kai Zhang
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  2. Chuanfu Li
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  4. Li Li
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Correspondence to Chuanfu Li.

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Zhang, K., Li, C., Liu, Y. et al. Evaluation of invasiveness of astrocytoma using 1H-magnetic resonance spectroscopy: correlation with expression of matrix metalloproteinase-2. Neuroradiology 49, 913–919 (2007). https://doi.org/10.1007/s00234-007-0271-8

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  • DOI: https://doi.org/10.1007/s00234-007-0271-8

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