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Title: | One-pot synthesis of a cyclic antimicrobial peptide-conjugated phthalocyanine for synergistic chemo-photodynamic killing of multidrug-resistant bacteria | Authors: | Chu, JCH Chin, ML Wong, CTT Hui, M Lo, PC Ng, DKP |
Issue Date: | Mar-2021 | Source: | Advanced Therapeutics, Mar. 2021, v. 4, no. 3, 2000204 | Abstract: | Multidrug-resistant (MDR) bacteria pose a serious threat to public health globally. Among the various antimicrobial modalities that have recently emerged, photodynamic therapy has received considerable attention because of its various potential advantages, including the unlikelihood of inducing drug resistance. A facile synthetic approach is reported to prepare a phthalocyanine-based photosensitizer conjugated with a cyclic bactenecin peptide. This one-pot procedure that involves site-selective alkylation of the two cysteine residues of a linear bactenecin peptide followed by Diels–Alder reaction leads to the formation of the conjugate labeled as cBac-Pc in 27% isolated yield. As shown by confocal fluorescence microscopy, this conjugate shows selective affinity toward bacterial over mammalian cells. It can also induce synergistic cytotoxic effects due to the cyclic peptide and phthalocyanine against a spectrum of Gram-positive and Gram-negative bacterial strains, including two ATCC-type strains and two clinical isolates of MDR bacterial strains. It is believed that the inhibition mechanism is based on the physical destruction of the cell membrane due to the cyclic peptide followed by photodynamic action induced by the phthalocyanine unit. | Keywords: | Antimicrobials Cyclization Peptides Photodynamic therapy Phthalocyanines |
Publisher: | Wiley-VCH Verlag GmbH & Co. KGaA | Journal: | Advanced Therapeutics | EISSN: | 2366-3987 | DOI: | 10.1002/adtp.202000204 | Description: | Dr. Clarence T. T. Wong, affiliated with the Hong Kong Polytechnic University at the time of final publication. | Rights: | © 2020 Wiley-VCH GmbH This is the peer reviewed version of the following article: Chu, J.C.H., Chin, M.L., Wong, C.T.T., Hui, M., Lo, P.-C. and Ng, D.K.P. (2021), One-Pot Synthesis of a Cyclic Antimicrobial Peptide-Conjugated Phthalocyanine for Synergistic Chemo-Photodynamic Killing of Multidrug-Resistant Bacteria. Adv. Therap., 4: 2000204, which has been published in final form at https://doi.org/10.1002/adtp.202000204. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited. |
Appears in Collections: | Journal/Magazine Article |
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Chu_One‐Pot_Synthesis_Cyclic.pdf | Pre-Published version | 2.12 MB | Adobe PDF | View/Open |
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