Efficacy of inverso isomer of CendR peptide on tumor tissue penetration
Acta Pharmaceutica Sinica B
;
(6): 825-832, 2018.
Artigo
em Inglês
| WPRIM
| ID: wpr-690860
ABSTRACT
The dense extracellular matrix and high interstitial fluid pressure of tumor tissues prevent the ability of anti-tumor agents to penetrate deep into the tumor parenchyma for treatment effects. C-end rule (CendR) peptides can enhance the permeability of tumor blood vessels and tumor tissues binding to neuropilin-1 (NRP-1), thus aiding in drug delivery. In this study, we selected one of the CendR peptides (sequence RGERPPR) as the parent l-peptide and substituted d-amino acids for the l-amino acids to synthesize its inverso peptide (RGERPPR). We investigated the NRP-1 binding activity and tumor-penetrating ability of (RGERPPR). We found that the binding affinity of (RGERPPR) with NRP-1 and the cellular uptake was significantly higher than that of RGERPPR. Evans Blue tests revealed that (RGERPPR) exhibited improved tumor-penetrating ability in C6, U87 and A549 tumor-bearing nude mice. Using nude mice bearing A549 xenograft tumors as a model, we found that the rate of tumor growth in the group co-administered with (RGERPPR) and gemcitabine (Gem) was significantly lower than the gemcitabine-treated group with a tumor suppression rate (TSR%) of 55.4%. Together, our results demonstrate that (RGERPPR) is a potential tumor-penetrating peptide.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Idioma:
Inglês
Revista:
Acta Pharmaceutica Sinica B
Ano de publicação:
2018
Tipo de documento:
Artigo
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