Molybdenum-Iodine Cluster Loaded Polymeric Nanoparticles Allowing a Coupled Therapeutic Action with Low Side Toxicity for Treatment of Ovarian Cancer.

The ability of cancer cells to develop resistance to anti-cancer drugs, known as multidrug resistance, remains a major cause of tumor recurrence and cancer metastasis. This work explores the double mechanism of toxicity of (D, L-lactide-co-glycolide) acid (PLGA) nanoparticles encapsulating a molybdenum cluster compound, namely Cs[{MoI}(OOCCF)] (CMIF). Hemocompatibility and biocompatibility assays show the safe potential of CMIF loaded nanoparticles (CNPs) as delivery systems intended for tumor targeting for PDT of ovarian cancer with a slight hemolytic activity and a lack of toxicity up to 50 µM CMIF concentration.

From molecules to nanovectors: Current state of the art and applications of photosensitizers in photodynamic therapy.

Photodynamic therapy (PDT) is a concept based on a selective activation by light of drugs called photosensitizers (PS) leading to reactive oxygen species production responsible for cell destruction. Mechanisms of photodynamic reaction and cell photo-destruction following direct or indirect mechanisms will be presented as well as PS classification, from first generation molecules developed in the 1960 s to third generation vectorized PS with improved affinity for tumor cells. Many clinical applications in dermatology, ophthalmology, urology, gastroenterology, gynecology, neurosurgery and pneumology reported encouraging results in human tumor management.

Molybdenum cluster loaded PLGA nanoparticles as efficient tools against epithelial ovarian cancer.

In this study, poly (lactic-co-glycolic) acid nanoparticles loading inorganic molybdenum octahedral cluster were used for photodynamic therapy (PDT) of ovarian cancer. Three cluster compounds, ((CH)N)[{MoBr}Br], Cs[{MoBr}Br] and Cs[{MoI}(OOCF)] denoted TMB, CMB and CMIF were studied following their incorporation in nanoparticles by a nanoprecipitation method. All resulting nanoparticles exhibited physico-chemical characteristics such as size and zeta potential compatible with cellular uptake.

PLGA nanoparticles embedding molybdenum cluster salts: Influence of chemical composition on physico-chemical properties, encapsulation efficiencies, colloidal stabilities and in vitro release.

We present a screening of poly (D,L-lactide-co-glycolide) (PLGA) nanoparticles embedding a series of inorganic molybdenum octahedral clusters intended for photodynamic therapy (PDT) of cancer. Three cluster compounds from 2 cluster units, [{MoBr}Br] and [{MoI}(OOCF)] were studied. [{MoBr}Br]cluster units are found in the soluble ternary salt Cs[{MoBr}Br] (CMB) prepared by solid state chemistry at high temperature.

Molybdenum cluster loaded PLGA nanoparticles: An innovative theranostic approach for the treatment of ovarian cancer.

We evaluate poly (d,l-lactide-co-glycolide) (PLGA) nanoparticles embedding inorganic molybdenum octahedral cluster for photodynamic therapy of cancer (PDT). Tetrabutyl ammonium salt of MoBr cluster unit, (TBA)MoBr, presents promising photosensitization activity in the destruction of targeted cancer cells. Stable cluster loaded nanoparticles (CNPs) were prepared by solvent displacement method showing spherical shapes, zeta potential values around -30 mV, polydispersity index lower than 0.