Abstract:
:Cyclic RGD (cRGD) peptide-conjugated boronated albumin was developed to direct toward integrin αvβ3, which overexpresses on many cancer cells. A stepwise conjugation of c[RGDfK(Mal)] and maleimide-conjugated closo-dodecaborate (MID) to bovine serum albumin (BSA) afforded cRGD-MID-BSA, which was noncytotoxic toward both U87MG and A549 cells. As compared with l-BPA, selective antitumor activity of cRGD-MID-BSA toward U87MG cells overexpressing integrin αvβ3 was identified after thermal neutron irradiation. In vivo fluorescence live imaging of Cy5-conjugated cRGD-MID-BSA and MID-BSA revealed that both cRGD-MID-BSA and MID-BSA similarly reached the maximum accumulation during 8-12 h after injection. The selective accumulation and retention of Cy5-cRGD-MID-BSA was more pronounced than Cy5-MID-BSA after 24 h. An in vivo boron neutron capture therapy (BNCT) study revealed that the cRGD peptide ligand combination enhanced accumulation of MID-BSA into tumor cells in U87MG xenograft models. The significant tumor growth suppression was observed in U87MG xenograft models at a dose of 7.5 mg [10B]/kg after neutron irradiation.
journal_name
Mol Pharmjournal_title
Molecular pharmaceuticsauthors
Kawai K,Nishimura K,Okada S,Sato S,Suzuki M,Takata T,Nakamura Hdoi
10.1021/acs.molpharmaceut.0c00478subject
Has Abstractpub_date
2020-10-05 00:00:00pages
3740-3747issue
10eissn
1543-8384issn
1543-8392journal_volume
17pub_type
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