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Issue 5, 2013
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Folate-targeted PEGylated liposomes improve the selectivity of PDT with meta-tetra(hydroxyphenyl)chlorin (m-THPC)

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Abstract

The folate receptor (FR) is over-expressed in many human tumours and is being intensively studied also in the field of nanomedicine as a target to enhance the selectivity of drug delivery to cancer cells by using nanocarriers bearing folic acid (FA) on their surface. In this study we report the encapsulation of the photosensitizer (PS) meta-tetra(hydroxyphenyl)chlorin (m-THPC) in FA-targeted PEGylated liposomes used as a novel drug delivery system for photodynamic therapy (PDT) of cancer. Our in vitro investigations revealed that only a modest fraction of targeted liposomes were internalized by specific endocytosis in FR-positive KB cells. However, FA-liposomes doubled the uptake of the entrapped m-THPC with respect to un-targeted liposomes and enhanced the photo-induced cytotoxicity in KB cells. In contrast, in FR-negative A549 cells FA-targeted or un-targeted liposomes exhibited a very similar extent of internalization and as a consequence the same photo-killing efficiency.

Graphical abstract: Folate-targeted PEGylated liposomes improve the selectivity of PDT with meta-tetra(hydroxyphenyl)chlorin (m-THPC)

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Publication details

The article was received on 12 Nov 2012, accepted on 16 Jan 2013 and first published on 17 Jan 2013


Article type: Paper
DOI: 10.1039/C3PP25384H
Citation: Photochem. Photobiol. Sci., 2013,12, 823-834

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    Folate-targeted PEGylated liposomes improve the selectivity of PDT with meta-tetra(hydroxyphenyl)chlorin (m-THPC)

    F. Moret, D. Scheglmann and E. Reddi, Photochem. Photobiol. Sci., 2013, 12, 823
    DOI: 10.1039/C3PP25384H

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