Paola HI, Martinetti MJA, Escobar RP

Language: Spanish
References: 30
Page: 370-385
PDF size: 511.39 Kb.

ABSTRACT

Introduction: miltefosine ultradeformable liposomes (MIL-LUD) are an option for the topical treatment of cutaneous leishmaniasis penetrating the skin layers to the dermis where the parasite inhabits.
Objective: to design MIL-LUD and determine their in vitro activity against L. (Viannia) panamensis and L. (V.) braziliensis and to determine human skin permeation.
Methods: MIL-LUD, phosphatidylcholine liposomes (MIL-LConv) and fluorescent MIL-LUD (MIL-LUD-Fluo) were prepared by lipid film rehydration method. They were physicochemically characterized to determine drug release in semisynthetic membrane, retention in skin layers and permeation on human skin membranes. Cytotoxicity in THP-1 was determined by the MTT colorimetric test and activity in promastigotes and intracellular amastigotes by microscopic counting.
Results: the size, the polydispersion index, the Zeta potential and phospholipid content were 100.7 nm, 0.147, -12.0mV and 53.24mM, respectively for MIL-LUD. MIL flow through the semisynthetic membrane was greater with MIL-LUD than MILfree treatment. MIL-LUD treatment induced lower MIL accumulation in the stratum corneum and increased permeation than MIL free treatment. The MIL-LUD and MILConv maintained MIL activity in parasites and cells. The MIL-LUD was more toxic to cells than MIL-Conv and more active against intracellular amastigotes of L. (V.) braziliensis.
Conclusion: prepared LUD -MIL retained the anti-leishmanial activity of the MIL and allowed the compound release in human skin and membranes. Testing of experimental cutaneous leishmaniasis models to evaluate the activity of these formulations are urgently needed.

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