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Nanoemulsão contendo 7-cetocolesterol (LDE/7KC) promove inibição do crescimento de malanoma em camundongos e aumento de sobrevida / A 7-ketocholesterol containing-nanoemulsion (LDE/7KC) inhibits growth of melanoma tumor in mice and increases survival rate
São Paulo; s.n; 2007. 100 p. ilus, tab, graf.
Thesis in Portuguese | LILACS | ID: lil-456644
RESUMO
7-cetocoleterol (7KC) é um oxisterol conhecido por inibir a proliferação celular e por ser citotóxico. Uma nanoemulsão contendo 7KC (LDE/7KC) demonstrou efeito anti-proliferativo sobre as linhagens RPMI 8226 (mieloma) e melanoma (B16F10), in vitro. Sendo preferencialmente captada via receptores de LDL. No presente trabalho, avaliamos, in vivo, a cinética plasmática, biodistribuição e ação anti-tumoral em camundongos portadores de melanoma. A nanoemulsão dirigiu-se principalmente no fígado e ao tumor, demonstrando direcionamento a tecidos com alta expressão de receptores para LDL. LDE/7KC promoveu uma redução superior a cinqüenta por cento do tamanho do tumor, que apresentou maior área de necrose e menor quantidade de vasos e aumentou a sobrevida dos camundongos, sem causar toxicidade.
ABSTRACT
7-ketocholesterol (7KC) is an oxysterol known to inhibit cell proliferation and to be cytotoxic. A nanoemulsion containing-7KC (LDE/7KC) was shown to had antiproliferative effects on RPMI 8226 myeloma cell line and melanoma (B16F10), in vitro. This particle is taken up mainly by LDL receptors. Here we have evaluated the plasma kinetic, biodistribution and the anti-tumoral action of LDE/7KC in melanoma bearing mice. The nanoemulsion accumulated in the liver and tumor, tissues with a high expression of LDL receptors. LDE/7KC promoted a tumor size reduction over fifty percent. A increased necrosis area and a decreased amount of blood vessels was found. A increased survival rate was observed, together with a lack of toxicicity.
Subject(s)
Full text: Available Index: LILACS (Americas) Main subject: Skin Neoplasms / Emulsions / Ketocholesterols Language: Portuguese Year: 2007 Type: Thesis

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Full text: Available Index: LILACS (Americas) Main subject: Skin Neoplasms / Emulsions / Ketocholesterols Language: Portuguese Year: 2007 Type: Thesis