Document Detail

A 99mTc-MAG3-aptamer for imaging human tumours associated with high level of matrix metalloproteinase-9.
MedLine Citation:
PMID:  23043415     Owner:  NLM     Status:  Publisher    
The human matrix metalloprotease 9 (hMMP-9) is involved in many physiological processes such as tissue remodeling. Its overexpression in tumors promotes the release of cancer cells thus contributing to tumor metastasis. It is a relevant marker of malignant tumors. We selected an RNA aptamer containing 2'fluoro, pyrimidine ribonucleosides, that exhibits a strong affinity for hMMP-9 (Kd = 20 nM) and that discriminates other human MMPs: no binding was detected to either hMMP-2 or -7. Investigating the binding properties of different MMP-9 aptamer variants by surface plasmon resonance allowed the determination of recognition elements. As a result, a truncated aptamer, 36 nucleotide long was made fully resistant to nuclease following the substitution of every purine ribonucleoside residue by 2'-O-methyl analogues and was conjugated to S-acetylmercaptoacetyltriglycine for imaging purposes. The resulting modified aptamer retained the binding properties of the originally selected sequence. Following 99mTc labelling this aptamer was used for ex vivo imaging slices of human brain tumors. We were able to specifically detect the presence of hMMP-9 in such tissues.
Sonia Da Rocha Gomes; Julie Miguel; Laurent Azéma; Sandrine Eimer; Colette Ries; Eric Dausse; Hugues Loiseau; Michele Allard; Jean-Jacques Toulme
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-8
Journal Detail:
Title:  Bioconjugate chemistry     Volume:  -     ISSN:  1520-4812     ISO Abbreviation:  Bioconjug. Chem.     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-9     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9010319     Medline TA:  Bioconjug Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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