BODIPY-attached zinc(II) complexes of curcumin drug for visible light assisted photo-sensitization, cellular imaging and targeted PDT.

Autor: Bhattacharyya A; Department of Inorganic and Physical Chemistry, Indian Institute of Science, Sir C.V. Raman Avenue, Bangalore, 560012, India., Jameei A; Department of Biochemistry, Indian Institute of Science, Sir C.V. Raman Avenue, Bangalore, 560012, India., Karande AA; Department of Biochemistry, Indian Institute of Science, Sir C.V. Raman Avenue, Bangalore, 560012, India. Electronic address: anjali@alum.iisc.ac.in., Chakravarty AR; Department of Inorganic and Physical Chemistry, Indian Institute of Science, Sir C.V. Raman Avenue, Bangalore, 560012, India. Electronic address: arc@iisc.ac.in.
Jazyk: angličtina
Zdroj: European journal of medicinal chemistry [Eur J Med Chem] 2021 Aug 05; Vol. 220, pp. 113438. Date of Electronic Publication: 2021 Apr 20.
DOI: 10.1016/j.ejmech.2021.113438
Abstrakt: Boron-dipyrromethene (BODIPY) based photosensitizers as porphyrinoids and curcumin as natural product possess exciting photophysical features suitable for theranostic applications, namely, imaging and photodynamic therapy (PDT). Limited aqueous solubility and insufficient physiological stability, however, reduce their efficacy significantly. We have designed a novel strategy to deliver these two unusable cytotoxins simultaneously in cancer cells and herein, report the synthesis, characterization and imaging-assisted photocytotoxicity of three zinc(II) complexes containing N 3 -donor dipicolylamine (dpa) ligands (L 1-3 ) and O,O-donor curcumin (Hcur) viz. [Zn(L 1 )(cur)]Cl (1), [Zn(L 2 )(cur)]Cl (2) and [Zn(L 3 )(cur)]Cl (3), where L 2 and L 3 have pendant fluorescent BODIPY and non-emissive di-iodo-BODIPY moieties. Metal chelation imparted remarkable biological stability (pH ∼7.4) to the respective ligands and induces significant aqueous solubility. These ternary complexes could act as replacements of the existing metalloporphyrin-based PDT photosensitizers as their visible-light photosensitizing ability is reinforced by the dual presence of blue light absorbing curcumin and green light harvesting BODIPY units. Complex 2 having emissive BODIPY unit L 2 and curcumin, showed mitochondria selective localization in HeLa, MCF-7 cancer cells and complex 3, the di-iodinated analogue of complex 2, exhibited type-I/II PDT activity via inducing apoptosis through mitochondrial membrane disruption in cancer cells while being significantly nontoxic in dark and to the healthy cells.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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Databáze: MEDLINE
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