To look for the association of tissue matrix metalloproteinase 9 (MMP-9) expression with dynamic contrast-enhanced magnetic resonance imaging and to see whether these can prognosticate patients with glioblastoma multiforme (GBM).
Forty-seven patients with GBM underwent dynamic contrast-enhanced magnetic resonance imaging to look for association of its indices with tissue MMP-9 expression using Pearson correlation. Kaplan-Meier survival analysis was performed to study the survival pattern for low-, medium-, and high-tissue MMP-9 expression and k ep values.
Among perfusion indices, k ep, k trans, and v e significantly correlated with MMP-9 expression. Matrix metalloproteinase 9 expression was found to be best estimated by k ep using a quadratic model. The 1-year survival in low-, medium-, and high-tissue MMP-9 and k ep groups were 59%, 45%, and 7%, and 59%, 33%, and 15%, respectively.
The association of k ep and MMP-9 expression with survival suggests that k ep may be used as imaging biomarker of GBM progression and its prognostication.
From the *Departments of Radiodiagnosis, and †Biostatistics, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow; ‡Department of Mathematics and Statistics, Indian Institute of Technology, Kanpur; §Departments of Neurosurgery, and ∥Radiotherapy, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow; and ¶Department of Pathology, Chhatrapati Sahuji Maharj Medical University, Lucknow, India.
Received for publication August 28, 2011; accepted October 25, 2011.
Reprints: Rakesh K. Gupta, MD, MR Section, Department of Radiodiagnosis, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, UP, India 226014 (e-mail: email@example.com; firstname.lastname@example.org).
Rishi Awasthi received financial assistance from Indian Council of Medical Research, New Delhi, India (No.3/1/3/JRF-2007/MPD).
The authors report no conflicts of interest.