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Article Publish Status: FREE
Abstract Title:

Antiviral activity of curcumin-nanoemulsion associated with photodynamic therapy in vulvar cell lines transducing different variants of HPV-16.

Abstract Source:

Artif Cells Nanomed Biotechnol. 2020 Dec ;48(1):515-524. PMID: 32048523

Abstract Author(s):

Caroline Measso do Bonfim, Letícia Figueiredo Monteleoni, Marília de Freitas Calmon, Natália Maria Cândido, Paola Jocelan Scarin Provazzi, Vanesca de Souza Lino, Tatiana Rabachini, Laura Sichero, Luisa Lina Villa, Silvana Maria Quintana, Patrícia Pereira Dos Santos Melli, Fernando Lucas Primo, Camila Fernanda Amantino, Antonio Claudio Tedesco, Enrique Boccardo, Paula Rahal

Article Affiliation:

Caroline Measso do Bonfim

Abstract:

Vulvar intraepithelial neoplasia (VIN) is associated with human papillomavirus (HPV) infection. Curcumin is a natural bioactive compound with antineoplastic properties. The use of nanoparticles containing curcumin could allow a better performance of this compound in therapies. So, VIN biopsies were collected and HPV DNA detection was performed by PCR, positive samples were genotyped by Restriction Fragment Length Polymorphism (RFLP) and HPV-16 variants were determined by sequencing. HPV-16 positive vulva carcinoma cells (A431) were transduced with E-P and E-350G HPV-16 E6 variants. The viability of the transduced cells treated with nanoemulsions was determined by MTT assay. Besides, apoptosis was evaluated by enzymatic activity of Caspase-3/7. The cell viability assay showed that both the empty nanoemulsion (NE-V) and the nanoemulsion of curcumin (NE-CUR) had little effect on cell viability as compared to control cells. Additionally, we observed that cells irradiated in the presence of NE-CUR presented 90% of cell death. The apoptosis assay further revealed a significant increase in the activity of caspases 3 and 7 in A431 cells expressing both HPV-16 E6 variants after treatment with NE-CUR. Finally, we submitted the HPV transduced A431 cells to organotypic cultures and observed that the combination of treatments affected tissue architecture with evident signals of tissue damage. We concluded that nanoemulsions attain good biocompatibility, since no cytotoxicity was observed and NE-CUR associated with photoactivation showed promising results, leading to death only in cells subjected to irradiation. This drug delivery system associated with photodynamic therapy may become promising in the treatment of vulva lesions.

Study Type : In Vitro Study

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Sayer Ji
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