Polymeric micelles of pluronic F127 reduce hemolytic potential of amphiphilic drugs

Autor(es)

Feitosa, Valker Araujo ^{[1, 2]} ; de Almeida, Vinicius Cordeiro ^[1] ; Malheiros, Barbara ^[3] ; de Castro, Raphael Dias ^[3] ; Souza Barbosa, Leandro Ramos ^[3] ; Pereira Cerize, Natalia Neto ^[2] ; Rangel-Yagui, Carlota de Oliveira ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sch Pharmaceut Sci, Dept Biochem & Pharmaceut Technol, Sao Paulo - Brazil

^[2] Inst Technol Res IPT, Bionanomfg Ctr, Sao Paulo - Brazil

^[3] Univ Sao Paulo, Inst Phys, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: COLLOIDS AND SURFACES B-BIOINTERFACES; v. 180, p. 177-185, AUG 1 2019.
• Citações Web of Science: 0

Resumo

One of the main toxicities associated to intravenous administration of amphiphilic drugs is pronounced hemolytic activity. To overcome this limitation, we investigated the anti-hemolytic properties of polymeric micelles of Pluronics, triblock copolymers of poly(ethylene oxide) and poly(propylene oxide). We studied the encapsulation of the amphiphilic compound miltefosine (HePC) into polymeric micelles of Pluronics F108, F68, F127, L44, and L64. In vitro hemolysis indicated that, among the five copolymers studied, only F127 completely inhibited hemolytic effect of HePC at 50 mu g/mL, this effect was also observed for other two amphiphilic molecules (cetyltrimethylammonium bromide and cethylpyridinium chloride). To better understand this interaction, we analyzed the HC50 (concentration causing 50% of hemolysis) for HePC free and loaded into F127 micelles. Copolymer concentration influenced the hemolytic profile of encapsulated HePC; for F127 the HC50 increased relative to free HePC (40 mu g/mL) up to 184, 441, 736 and 964 mu g/mL, for 1, 3, 6 and 9% F127, respectively. Interestingly, a linear relationship was found between HC50-HePC and F127 concentration. At 3% of F127, it is possible to load up to 300 mu g/mL of HePC with no hemolytic effect, By achieving this level of hemolysis protection, a promising application is on the view, bringing the parenteral use of HePC and other amphiphilic drugs. Additionally, small-angle X-ray scattering (SAXS) was used to asses structural information on the interactions between HePC and F127 micelles. (AU)

• Processo FAPESP: 15/15822-1 - Estudo das propriedades físico-químicas e estruturais de fármacos e líquidos iônicos com sistemas de relevância biológica
• Beneficiário: Leandro Ramos Souza Barbosa
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/01983-0 - Síntese e desenvolvimento nanotecnológico de análogos homocolínicos da miltefosina
• Beneficiário: Carlota de Oliveira Rangel Yagui
• Modalidade de apoio: Auxílio à Pesquisa - Regular