Miltefosine-loaded lipid nanoparticles: Improving miltefosine stability and reducing its hemolytic potential toward erythtocytes and its cytotoxic effect on macrophages
| Autor: | Claudete J. Valduga, Marcia M Dos Santos, José Jardes da Gama Bitencourt, Carolline de Paula Pinto, Thales Henrique Santos Guimarães, Marina Berardi Barioni, Wallance Moreira Pazin, Maria Aparecida Gonçalves dos Santos, Amando Siuiti Ito |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Erythrocytes Gastrointestinal Diseases Phosphorylcholine 030106 microbiology Antiprotozoal Agents Biophysics Phospholipid Pharmacology Hemolysis Biochemistry Mice 03 medical and health sciences chemistry.chemical_compound Drug Stability medicine Animals Humans FÁRMACOS Particle Size Cytotoxicity Amastigote Cells Cultured Drug Carriers Mice Inbred BALB C Miltefosine Cell Death biology Chemistry Macrophages Organic Chemistry Leishmaniasis medicine.disease Leishmania biology.organism_classification Lipids RAW 264.7 Cells 030104 developmental biology Nanoparticles Drug carrier medicine.drug |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 0301-4622 |
| DOI: | 10.1016/j.bpc.2016.07.005 |
| Popis: | The toxic effects of miltefosine on the epithelial cells of the gastrointestinal tract and its hemolytic action on erythrocytes have limited its use as an antileishmanial agent. As part of our search for new strategies to overcome the side effects of miltefosine during the treatment of leishmaniasis, we have developed stable miltefosine-loaded lipid nanoparticles in an attempt to reduce the toxic effects of the drug. We have evaluated lipid nanoparticles containing varying amounts of miltefosine and cholesterol, prepared by sonication, in terms of their physicochemical properties, preliminary stability, hemolytic potential toward erythrocytes, and cytotoxicity to macrophages and to promastigote and amastigote forms of Leishmania (L.) chagasi. Miltefosine loading into lipid nanoparticles was 100% for low drug concentrations (7.0 to 20.0mg/mL). Particle size decreased from 143nm (control) to between 43 and 69nm. From fluorescence studies, it was observed that the presence of miltefosine and cholesterol (below 103μM) promoted ordering effects in the phospholipid region of the nanoparticles. The formulation containing 15mg/mL miltefosine was stable for at least six months at 4°C and in simulated gastrointestinal fluids, and did not promote epithelial gastrointestinal irritability in Balb/C mice. When loaded into lipid nanoparticles, the hemolytic potential of miltefosine and its cytotoxicity to macrophages diminished, while its antiparasitic activity remained unaltered. The results suggested that miltefosine-loaded lipid nanoparticles may be promising for the treatment of leishmaniasis and might be suitable for oral and parenteral use. |
| Databáze: | OpenAIRE |
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