title: Effect of sphingosine and phorbol-12-myristate-13-acetate on the growth and dimethylsulfoxide-induced differentiation in the insect trypanosomatid Herpetomonas samuelpessoai.
abstract: We investigated the effect of two modulators of protein kinase C, sphingosine and phorbol-12-myristate-13-acetate (PMA), on the growth and dimethylsulfoxide (DMSO)-induced differentiation in Herpetomonas samuelpessoai. Sphingosine did not stimulate the transformation of undifferentiated-promastigotes in differentiated-paramastigotes. PMA alone or in association with DMSO increased the number of paramastigotes in comparison to control cells. DMSO inhibited the parasite growth (35%) and several unusual morphological features resembling aberrant cell division were observed. Sphingosine did not significantly reduce the growth in contrast to PMA. Collectively, our results demonstrated that the reduction of the proliferation translates in an increase of the differentiation rate in the insect trypanosomatid H. samuelpessoai.
authors: Laboratório de Estudos Integrados em Bioquímica Microbiana, Universidade Federal do Rio de Janeiro, RJ, Fiocruz, Rio de Janeiro, RJ, Brasil. andre@micro.ufrj.br
authors: André Luis Souza dos
authors: AL
authors: Santos
authors: Rosangela Maria de Araújo
authors: RM
authors: Soares
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000187:drug effects; D004121:Dimethyl Sulfoxide / Q000494:pharmacology*; D004789:Enzyme Activation / Q000187:drug effects; D011493:Protein Kinase C / Q000187:drug effects*; D013110:Sphingosine / Q000494:pharmacology*; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology*; D014351:Trypanosomatina / Q000187:drug effects* / Q000201:enzymology / Q000254:growth & development
chemical_list: D011493:Protein Kinase C; D013110:Sphingosine; D013755:Tetradecanoylphorbol Acetate; D004121:Dimethyl Sulfoxide