pHLIP-FIRE, a cell insertion-triggered fluorescent probe for imaging tumors demonstrates targeted cargo delivery in vivo.
pHLIP-FIRE, a cell insertion-triggered fluorescent probe for imaging tumors demonstrates targeted cargo delivery in vivo.
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DOI:
10.1021/cb500388m
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发表时间:
2014-11-21
影响因子:
4
通讯作者:
Engelman, Donald M.
中科院分区:
文献类型:
--
作者:
Katabadzhak, Alexander G.;An, Ming;Yao, Lan;Langenbacher, Rachel;Moshnikova, Anna;Adochite, Ramona-Cosmina;Andreev, Oleg A.;Reshetnyak, Yana K.;Engelman, Donald M.
We have developed an improved tool for imaging acidic tumors by reporting the insertion of a transmembrane helix: the pHLIP-Fluorescence Insertion REporter (pHLIP-FIRE). In acidic tissues, such as tumors, peptides in the pHLIP family insert as α-helices across cell membranes. The cell-inserting end of the pHLIP-FIRE peptide has a fluorophore–fluorophore or fluorophore–quencher pair. A pair member is released by disulfide cleavage after insertion into the reducing environment inside a cell, resulting in dequenching of the probe. Thus, the fluorescence of the pHLIP-FIRE probe is enhanced upon cell-insertion in the targeted tissues but is suppressed elsewhere due to quenching. Targeting studies in mice bearing breast tumors show strong signaling by pHLIP-FIRE, with a contrast index of ∼17, demonstrating (i) direct imaging of pHLIP insertion and (ii) cargo translocation in vivo. Imaging and targeted cargo delivery should each have clinical applications.
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DOI:
10.1038/nrc3566
发表时间:
2013-09
期刊:
Nature reviews. Cancer
影响因子:
--
作者:
通讯作者:
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DOI:
10.1073/pnas.0601463103
发表时间:
2006-04-25
影响因子:
11.1
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DOI:
10.1073/pnas.1405240111
发表时间:
2014-05-20
影响因子:
11.1
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影响因子:
5.6
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11.2
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Gillies RJ