Abstract:
:Integrin αvβ3 is a cell adhesion molecule involved in the progression and invasion of glioblastoma, making it an attractive target for the diagnosis of glioblastoma. Although some integrin αvβ3 specific ligands, such as RGD and its mimetic peptides (Cilengitide), have been devoted in detecting glioblastoma, their clinical practices have been limited due to low specificity and affinity. Herein, we have identified a linear peptide RWrNK, containing an unnatural d-arginine (r), as the integrin αvβ3-specific ligand. RWrNK shows high binding affinity to integrin αvβ3 with a Kd value of 1.6 nM, which is 2-fold higher than Cilengitide (3.2 nM), a well-established integrin αvβ3 ligand. In addition, RWrNK can not only rapidly transport in human glioblastoma U87MG cells but effectively label U87MG tumor spheroids, compared to Cilengitide, indicating that it possesses an ability to sensitively detect glioblastoma. Importantly, RWrNK can pass through blood-brain tumor barrier (BBTB) and selectively accumulate in orthotopic U87MG tumor within 2 h, allowing for imaging glioblastoma in vivo with high sensitivity and specificity. Overall, RWrNK has the great potential in theranostic applications for glioblastoma, in consideration of its high specificity and affinity for integrin αvβ3.
journal_name
Mol Pharmjournal_title
Molecular pharmaceuticsauthors
Zhang L,Shan X,Meng X,Gu T,Guo L,An X,Jiang Q,Ge H,Ning Xdoi
10.1021/acs.molpharmaceut.9b00602subject
Has Abstractpub_date
2019-09-03 00:00:00pages
3977-3984issue
9eissn
1543-8384issn
1543-8392journal_volume
16pub_type
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