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Published in: BMC Cancer 1/2021

Open Access 01-12-2021 | Photodynamic Therapy | Research article

Novel meso-substituted porphyrin derivatives and its potential use in photodynamic therapy of cancer

Authors: Pablo Vallecorsa, Gabriela Di Venosa, M. Belén Ballatore, Dario Ferreyra, Leandro Mamone, Daniel Sáenz, Gustavo Calvo, Edgardo Durantini, Adriana Casas

Published in: BMC Cancer | Issue 1/2021

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Abstract

Background

Photodynamic therapy (PDT) is an anticancer treatment that utilizes the interaction of light and a photosensitiser (PS), promoting tumour cell death mediated by generation of reactive oxygen species. In this study, we evaluated the in vitro photoactivity of four meso-substituted porphyrins and a porphyrin coupled to a fullerene.

Methods

The cell line employed was the LM3 mammary adenocarcinoma, and the PS with the best photokilling activity was administered to mice bearing the LM3 subcutaneously implanted adenocarcinoma. The TEMCP4+ porphyrin and its analogue TEMCC4+ chlorine contain four identical carbazoyl substituents at the meso positions of the tetrapyrrolic macrocycle and have A4 symmetry. The TAPP derivative also has A4 symmetry, and it is substituted at the meso positions by aminopropoxy groups. The DAPP molecule has ABAB symmetry with aminopropoxy and the trifluoromethyl substituents in trans positions. The TCP-C604+ dyad is formed by a porphyrin unit covalently attached to the fullerene C60.

Results

The PSs are taken up by the cells with the following efficiency: TAPP> TEMCP4+ = TEMCC4+ > DAPP >TCP-C604+, and the amount of intracellular PS correlates fairly with the photodamage degree, but also the quantum yields of singlet oxygen influence the PDT outcome. TAPP, DAPP, TEMCC4+ and TEMCP4+ exhibit high photoactivity against LM3 mammary carcinoma cells, being TAPP the most active. After topical application of TAPP on the skin of mice bearing LM3 tumours, the molecule is localized mainly in the stratum corneum, and at a lower extent in hair follicles and sebaceous glands. Systemic administration of TAPP produces a tumour: normal skin ratio of 31.4, and high accumulation in intestine and lung.

Conclusion

The results suggest a potential use of topical TAPP for the treatment of actinic keratosis and skin adnexal neoplasms. In addition, selectivity for tumour tissue after systemic administration highlights the selectivity of and potentiality of TAPP as a new PS.
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Metadata
Title
Novel meso-substituted porphyrin derivatives and its potential use in photodynamic therapy of cancer
Authors
Pablo Vallecorsa
Gabriela Di Venosa
M. Belén Ballatore
Dario Ferreyra
Leandro Mamone
Daniel Sáenz
Gustavo Calvo
Edgardo Durantini
Adriana Casas
Publication date
01-12-2021
Publisher
BioMed Central
Published in
BMC Cancer / Issue 1/2021
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/s12885-021-08286-6

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