Document Detail


Dynamic contrast-enhanced (DCE) derived transfer coefficient (ktrans) is a surrogate marker of matrix metalloproteinase 9 (MMP-9) expression in brain tuberculomas.
MedLine Citation:
PMID:  18777539     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: To correlate dynamic contrast-enhanced (DCE) MRI derived perfusion indices with immunohistochemically obtained vascular endothelial growth factor (VEGF) and matrix metalloproteinase-9 (MMP-9) in a cellular fraction of brain tuberculomas (BT). MATERIALS AND METHODS: Thirteen BT patients underwent DCE MRI. Perfusion indices (cerebral blood volume [CBV], transfer coefficient [ktrans] and leakage [ve]) maps were generated for the quantitative analysis. The CBV was corrected for the leaky blood-brain barrier (BBB). The relative CBV (rCBV), ktrans, and ve were calculated by placing 10 regions of interest (ROIs) showing the highest values in the lesion. The percentage area of VEGF and percentage area of MMP-9 and microvessel density (MVD) were quantified from 10 fields per lesion with maximal expression of the excised BT. Pearson correlation analysis between physiological indices and quantitative VEGF, MMP-9, and MVD was performed for each ROI. RESULTS: The average value of rCBV, ktrans, ve, VEGF, MMP-9, and MVD were 3.53+/-0.37, 2.04+/-0.40 min(-1), 0.71+/-0.09, 12.51+/-2.56, 18.09+/-2.06, 10.87+/-1.99, respectively. The ktrans (r=0.918, P<0.001) and ve (r=0.899, P<0.001) showed significant correlation with MMP-9, while rCBV correlated significantly with MVD (r=0.962, P<0.001) and VEGF (r=0.868, P<0.001). CONCLUSION: We conclude that the expression of MMP-9, a marker of BBB disruption and disease activity in BT correlates with DCE-derived ktrans and thus has the potential to be used as its surrogate marker.
Authors:
Mohammad Haris; Nuzhat Husain; Anup Singh; Rishi Awasthi; Ram Kishore Singh Rathore; Mazhar Husain; Rakesh K Gupta
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of magnetic resonance imaging : JMRI     Volume:  28     ISSN:  1053-1807     ISO Abbreviation:  J Magn Reson Imaging     Publication Date:  2008 Sep 
Date Detail:
Created Date:  2008-09-15     Completed Date:  2008-12-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9105850     Medline TA:  J Magn Reson Imaging     Country:  United States    
Other Details:
Languages:  eng     Pagination:  588-97     Citation Subset:  IM    
Copyright Information:
Copyright (c) 2008 Wiley-Liss, Inc.
Affiliation:
Department of Radiodiagnosis, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India.
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Biological Markers / analysis
Child
Child, Preschool
Contrast Media
Encephalitis / diagnosis*,  metabolism*
Female
Gadolinium DTPA / diagnostic use*
Humans
Image Interpretation, Computer-Assisted / methods*
Magnetic Resonance Imaging / methods*
Male
Matrix Metalloproteinase 9 / analysis*
Reproducibility of Results
Sensitivity and Specificity
Tuberculoma, Intracranial / diagnosis*,  metabolism*
Vascular Endothelial Growth Factor A / analysis*
Young Adult
Chemical
Reg. No./Substance:
0/Biological Markers; 0/Contrast Media; 0/Vascular Endothelial Growth Factor A; 80529-93-7/Gadolinium DTPA; EC 3.4.24.35/Matrix Metalloproteinase 9

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