کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2006539 | 1066345 | 2011 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Enhancement of the cancer targeting specificity of buforin IIb by fusion with an anionic peptide via a matrix metalloproteinases-cleavable linker Enhancement of the cancer targeting specificity of buforin IIb by fusion with an anionic peptide via a matrix metalloproteinases-cleavable linker](/preview/png/2006539.png)
Buforin IIb is a novel cell-penetrating anticancer peptide derived from histone H2A. In this study, we enhanced the cancer targeting specificity of buforin IIb using a tumor-associated enzyme-controlled activation strategy. Buforin IIb was fused with an anionic peptide (modified magainin intervening sequence, MMIS), which neutralizes the positive charge of buforin IIb and thus renders it inactive, via a matrix metalloproteinases (MMPs)-cleavable linker. The resulting MMIS:buforin IIb fusion peptide was completely inactive against MMPs-nonproducing cells. However, when the fusion peptide was administrated to MMPs-producing cancer cells, it regained the killing activity by releasing free buforin IIb through MMPs-mediated cleavage. Moreover, the activity of the fusion peptide toward MMPs-producing cancer cells was significantly decreased when the cells were pretreated with a MMP inhibitor. Taken together, these data indicate that the cancer targeting specificity of MMIS:buforin IIb is enhanced compared to the parent peptide by reactivation at the specialized areas where MMPs are pathologically produced.
Research highlights
► Buforin IIb is fused with an anionic peptide MMIS via a MMPs-cleavable linker.
► MMIS:buforin IIb is completely inactive against MMPs-nonproducing cells.
► MMIS:buforin IIb regains the killing activity against MMPs-producing cancer cells by releasing free buforin IIb through MMPs-mediated cleavage.
► The fusion peptide design strategy used in this study may be applied to increase the cancer targeting specificity of other cationic anticancer peptides.
Journal: Peptides - Volume 32, Issue 5, May 2011, Pages 895–899