Artículo
In vitro anti-melanoma activity of imiquimod in ultradeformable nanovesicles
Caimi, Ayelen Tatiana
; Ramirez, Cecilia; Perez, Ana Paula
; Romero, Eder Lilia
; Morilla, María José
Fecha de publicación:
11/2022
Editorial:
Taylor & Francis
Revista:
Drug Development and Industrial Pharmacy
ISSN:
0363-9045
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Background: The wide spectrum of antitumoral mechanisms of imiquimod (IMQ), made it a good candidate for topical therapy of melanoma. However, physicochemical properties make IMQ formulation a difficult task. Solubility and skin penetration of IMQ are increased when loaded into ultradeformable nanovesicles. Objective: Survey the in vitro anti-melanoma activity of IMQ loaded into two types of ultradeformable nanovesicles: archaeosomes (UDA-IMQ) (containing sn-2,3 ether-linked phytanyl saturated archaeolipids extracted from Halorubrum tebenquichense) and liposomes lacking archaeolipids (UDL-IMQ). Methods: We prepared and structurally characterized UDA-IMQ and UDL-IMQ. Cytotoxicity was determined on human melanoma cells (SK-Mel-28) and keratinocytes (HaCaT cells) by MTT assay and LDH release. The cellular uptake was determined by flow cytometry. Apoptosis/necrosis induction was determined by fluorescence microscopy after double staining with YO-PRO-1® and propidium iodide. Results: Neither IMQ nor IMQ-nanovesicles reduced the viability of HaCaT cells; but UDL-IMQ (371 nm, −24 mV ζ potential, 31 µg IMQ/mg lipids) and UDA-IMQ (216 nm, −32 mV ζ potential, 61 µg IMQ/mg lipids) showed time and concentration-dependent cytotoxicity on SK-Mel-28 that resulted between 4 and 33 folds higher than free IMQ, respectively. While both UDA-IMQ and UDL-IMQ retained 60% of IMQ against dilution, UDA-IMQ uptaken by SK-Mel-28 cells was nine-fold higher than UDL-IMQ. UDL-IMQ induced early apoptosis, but UDA-IMQ induced both apoptosis and necrosis on SK-Mel-28 cells. Conclusions: UDA-IMQ was innocuous to keratinocytes but was highly uptaken and induced apoptosis and necrosis on melanoma cells, being a candidate for future investigations as adjuvant topical anti-melanoma therapy.
Palabras clave:
APOPTOSIS
,
ARCHAEOLIPIDS
,
INTRACELLULAR DELIVERY
,
SK-MEL-28 CELLS
,
TOPICAL
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Identificadores
Colecciones
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Caimi, Ayelen Tatiana; Ramirez, Cecilia; Perez, Ana Paula; Romero, Eder Lilia; Morilla, María José; In vitro anti-melanoma activity of imiquimod in ultradeformable nanovesicles; Taylor & Francis; Drug Development and Industrial Pharmacy; 48; 11; 11-2022; 657-666
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