19 research outputs found

    Synthesis and biological evaluation of new salicylate macrolactones from anacardic acids

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    No âmbito de uma linha de pesquisa que visa a obtenção de novas substâncias bioativas, a partir de lipídeos fenólicos não-isoprenóides de Anacardium occidentale, descrevemos a síntese e avaliação citotóxica de novas macrolactonas salicílicas, preparadas a partir da mistura de ácidos anacárdicos, principal constituinte do líquido da casca da castanha de caju (LCC) in natura.In connection with our ongoing investigation in the search for new bioactive compounds using non-isoprenoid phenolic lipids from Anacardium occidentale as starting material, we describe the synthesis and cytotoxicity screening of some novel salicylate macrolactones prepared from anacardic acids, the major constitutents of natural cashew nut-shell liquid (CNSL)

    ADME studies and preliminary safety pharmacology of LDT5, a lead compound for the treatment of benign prostatic hyperplasia

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    This study aimed to estimate the absorption, distribution, metabolism and excretion (ADME) properties and safety of LDT5, a lead compound for oral treatment of benign prostatic hyperplasia that has previously been characterized as a multi-target antagonist of α1A-, α1D-adrenoceptors and 5-HT1A receptors. The preclinical characterization of this compound comprised the evaluation of its in vitro properties, including plasma, microsomal and hepatocytes stability, cytochrome P450 metabolism and inhibition, plasma protein binding, and permeability using MDCK-MDR1 cells. De-risking and preliminary safety pharmacology assays were performed through screening of 44 off-target receptors and in vivo tests in mice (rota-rod and single dose toxicity). LDT5 is stable in rat and human plasma, human liver microsomes and hepatocytes, but unstable in rat liver microsomes and hepatocytes (half-life of 11 min). LDT5 is highly permeable across the MDCK-MDR1 monolayer (Papp ∼32×10-6 cm/s), indicating good intestinal absorption and putative brain penetration. LDT5 is not extensively protein-bound and is a substrate of human CYP2D6 and CYP2C19 but not of CYP3A4 (half-life >60 min), and did not significantly influence the activities of any of the human cytochrome P450 isoforms screened. LDT5 was considered safe albeit new studies are necessary to rule out putative central adverse effects through D2, 5-HT1A and 5-HT2B receptors, after chronic use. This work highlights the drug-likeness properties of LDT5 and supports its further preclinical development

    ADME studies and preliminary safety pharmacology of LDT5, a lead compound for the treatment of benign prostatic hyperplasia

    Get PDF
    This study aimed to estimate the absorption, distribution, metabolism and excretion (ADME) properties and safety of LDT5, a lead compound for oral treatment of benign prostatic hyperplasia that has previously been characterized as a multi-target antagonist of α1A-, α1D-adrenoceptors and 5-HT1A receptors. The preclinical characterization of this compound comprised the evaluation of its in vitro properties, including plasma, microsomal and hepatocytes stability, cytochrome P450 metabolism and inhibition, plasma protein binding, and permeability using MDCK-MDR1 cells. De-risking and preliminary safety pharmacology assays were performed through screening of 44 off-target receptors and in vivo tests in mice (rota-rod and single dose toxicity). LDT5 is stable in rat and human plasma, human liver microsomes and hepatocytes, but unstable in rat liver microsomes and hepatocytes (half-life of 11 min). LDT5 is highly permeable across the MDCK-MDR1 monolayer (Papp ∼32×10-6 cm/s), indicating good intestinal absorption and putative brain penetration. LDT5 is not extensively protein-bound and is a substrate of human CYP2D6 and CYP2C19 but not of CYP3A4 (half-life >60 min), and did not significantly influence the activities of any of the human cytochrome P450 isoforms screened. LDT5 was considered safe albeit new studies are necessary to rule out putative central adverse effects through D2, 5-HT1A and 5-HT2B receptors, after chronic use. This work highlights the drug-likeness properties of LDT5 and supports its further preclinical development

    Uso de novos compostos capazes de absorver radiação ultravioleta, composições contendo os mesmos e processos para sua preparação

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    Em 11/04/2006: Publicação do Pedido Arquivado Definitivamente - Art. 216 § 2º e Art. 17 § 2º da LPI. Publicação de pedido definitivamente arquivado devido a não apresentação de procuração ou devido à apresentação de um pedido posterior. Encerrada a instância administrativa.Não concedidaA presente invenção trata de novas moléculas capazes de absorver radiação ultravioleta obtidas a partir de modificações no líquido da castanha de caju; são também descritas composições destinadas à proteção de superfícies e processos químicos para a produção das referidas moléculas

    Derivados N-fenilpiperazínicos antagonistas de adrenoceptores a1A, a1D e de receptores 5-HT1A no tratamento de Hiperplasia Prostática Benigna, composições farmacêuticas contendo os mesmos

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    DepositadaA presente invenção proporciona derivados N-fenilpiperazínicos como ligantes e/ou antagonistas múltiplos de adrenoceptores a1A, adrenoceptores a1D e receptores serotoninérgicos 5-HTIA. Tais substâncias são candidatos a protótipos para tratamento da hiperplasia prostática benigna e sintomas do trato urinário inferior, sendo úteis em composições farmacêuticas

    Compostos capazes de absorver radiação ultravioleta, composições contendo os mesmos e processos para sua preparação

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    Em 04/11/2016: Restauração de pedido, patente ou certificado de adição de invençãoDepositadaA presente invenção trata de moléculas capazes de absorver radiação ultravioleta obtidas a partir de modificações no líquido da castanha de caju; são também descritas composições destinadas à proteção de superfícies e processos químicos para a produção das referidas moléculas

    O Uso Próprio de Sementes Salvas e suas Relações com o Direito de Propriedade Intelectual dos Obtentores Vegetais Brasileiros

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    In Brazil, intellectual property rights of new plant varieties are regulated by the Cultivation Protection Act (LPC). After more than 20 years in enforcement, revisions in this law are necessary, especially the legal provision regarding the use of saved seeds, which, due to misinterpretations, have led to the diversion of the use of this institute, favoring seed piracy and consequent violation of the intellectual property rights of breeders. This paper analyzes the aspects related to the legal contents of saved seeds in Brazilian legislation and which deviations can occur in this institute that violate the rights of breeders. Results presents data on protected cultivars, seed market, saved seeds, inspection carried out in the country. Finally, in the final remarks, a proposal for amendment of the legislation.No Brasil os direitos de propriedade intelectual vegetal são regulados pela Lei n. 9.456/97, conhecida como Lei de Proteção de Cultivares (LPC). Após mais de 20 anos em vigência, revisões desta norma são necessárias, entre elas o dispositivo legal referente ao uso próprio de sementes salvas, que devido a interpretações equivocadas, tem provocado desvio de finalidade deste instituto, favorecendo a pirataria de sementes e consequentes violações de direitos de propriedade intelectual dos obtentores. A finalidade desta pesquisa é analisar os aspectos relacionados ao uso próprio de sementes salvas na legislação nacional e quais os desvios que ocorrem neste instituto e que violam os direitos dos obtentores. São apresentados os dados de cultivares protegidas, do mercado de sementes, bem como as informações sobre sementes salvas e a fiscalização realizada no país. Por fim, nas considerações finais é feita uma proposta de alteração na legislação

    Novas estratégias terapêuticas para o tratamento da depressão: uma visão da química medicinal

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    Depression is a widespread humor disturbance promoted mainly by depletion of biogenic neurotransmitter amines involved in the CNS synapses. Effective drug treatments for depression have been available for more than forty years. Despite its remarkable structural diversity, this paper discuss under the medicinal chemistry point of view, all different classes of "monoamine based" antidepressant drugs, emphasizing the rational design, structure-activity relationships (SAR), biotransformation and physico-chemical properties related with antidepressant activity and molecular mechanism of action
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