Cupá, ou cipó-babão, alimento de alguns índios amazônicos

INPA is developing studies concerning the agricultural plants of the Brazilian Indians. a collection was made among the Kayapó Indians of the Cupa vine (Cissus gongylodes Burch. ex Baker, Vitaceae). This note provides botanical information on this plant, its uses by the seringueiros (rubber collectors) and by the indians, and agronomical and chemical data

Alcalóides de Peschiera affinis (Muell. Arg) Miers (Apocynaceae)

The methanolic extracts of bark and woody roots from three especimens of Peschiera affinis (Apocynaceae) collected at different geographical sites (Fortaleza , Ubajara-CE e Cical-PI) afforded, after chromatographical separation, the following alkaloids: coronanidine, epiheyneanine, affinisine, vobasine, olivacine, voacangine, voacristine, iboxygaine and l9-hidroxi-ibogamine. The latter four substances were found previously in the genus Tabernanthe and Voacanga and are registered here for Peschiera affinis for the first time.A vista da discordância dos dados registrados na literatura (Cava, 1964, 1968 ; Jerry, 1963 e Matos, 1976) quanto aos alcalóides de Peschierra affinis, retomou-se seu estudo com o objetivo desta espécie. Foram analisados amostras das cascas e do lenho das raízes de material coletado em locais diferentes em altitude, longitude e latitude. Foram identificados além de substâncias de natureza alifática (sitosterol,β-amirina e lupenol). os seguintes alcalóides indólicoscoronaridina, voacangina, 20-epiheyneanina, voacristina, affinisina, vobasina, olivacina e uma mistura de 19-hidroxi-ibogamina e iboxigaína). Dentre estes, quatro são inéditos na espécie (voacangina, voacristina, 19-hidroxi-ibogaina e eboxigaína). Apenas pequenas diferenças foram observadas nos três materiais estudados, observando-se porém, acentuada diferença quando comparadas com os resultados obtidos no primeiro trabalho químico sobre os alcalóides desta espécie (Jerry, 1963)

Alcalóides De Tabernaemontana Heterophylla Vahl. (Apocynaceae)

Six indole alkaloids (coronaridine, voacangine, epiheyneanine, vobasine, affinisine and olivacine) as well as lupeol, 3-0- acetyllupeol and sitosterol were isolated from the roots of Tabernaemontana heterophylla Vahl.Dos extratos metanólicos da casca e do lenho da raíz da Tabernaemontana heterophylla Vahl. (Apocynaceae) foram isolados, além de sitosterol, lupeol e 3-O-acetil-lupeol, seis alcalóides indólicoscoronaridina, vobasina, affinisina, olivacina, voacangina e epiheyneanina

Alcalóides De Tabernaemontana Heterophylla Vahl. (Apocynaceae)

Six indole alkaloids (coronaridine, voacangine, epiheyneanine, vobasine, affinisine and olivacine) as well as lupeol, 3-0- acetyllupeol and sitosterol were isolated from the roots of Tabernaemontana heterophylla Vahl.Dos extratos metanólicos da casca e do lenho da raíz da Tabernaemontana heterophylla Vahl. (Apocynaceae) foram isolados, além de sitosterol, lupeol e 3-O-acetil-lupeol, seis alcalóides indólicoscoronaridina, vobasina, affinisina, olivacina, voacangina e epiheyneanina

Presença de alcalóides β-carbolínicos no Rami ou Hami (Bebida de índio)

From a drink widely utilized by the Indian nations of western Amazonia, hallucinogenic, two β-carbolinic alkaloids have been isolated

Determinação de ácidos orgânicos em plantas e alimentos da Amazônia. I - Ácidos orgânicos do Tucupi

Three types of Tucupi were analyzed by gas-Phase Chromatography. The following acids wore found: acetic, propionic, palmitic and oleic, in the yellow, white and macaxeira types; butiric and valeric in yellow type; and succinic in the yellow and white types.Três tipos de Tucupi foram analisados por Cromatografia em fase gasosa. Constatou-se a presença dos ácidosacético, propiônico, palmítico e oléico nos tipos amarelo, branco e de macaxeira; dos ácidos butírico e valérico no tipo amarelo, enquanto que o ácido succínico foi detectado nos tipos amarelo e branco

Biological Activity of a New Triterpen Isolated from Guarea carinata (Meliaceae)

From the bark of Guarea carinata was isolated as main constituent a diacetilated triterpen (I) of protolimonoids type, derived from apo-tirucalol, that showed antifeedant activity in biological control of Urbanus acawoios(Lepidoptera,Hesperiidae).Do cerne de Guarea carinata foi isolado como principal constituinte um triterpeno di-acetilado (I). do grupo dos protolimonóides, derivado do apo-tirucalol e que mostrou atividade no controle biológico das larvas de Urbanus acawoioa(WILLIAMS, R. C, 1926) (Lepidoptera Hesperiidac)

Estudo químico de óleos essenciais, oleaginosas e látices da Amazônia. I. Composição e oxidação do óleo de uma espécie de Copaifera (Nota prévia).

Preliminar note on a study of the resta oil (from the trunk) and the seed oil from a species of Copaifera was done, using the analytical methods known as GC/MS and HPLC and the volumetric method. This work was developed at the Divisão de Química of the INPA in collaboration with the Departamento de Química of the UPCe with the purpose to identify the chemical components and to establish the kinetic control of auto oxidation with and without the addition of antioxidants and synergistic agents

Pan-Cancer Analysis of lncRNA Regulation Supports Their Targeting of Cancer Genes in Each Tumor Context

Long noncoding RNAs (lncRNAs) are commonly dys-regulated in tumors, but only a handful are known toplay pathophysiological roles in cancer. We inferredlncRNAs that dysregulate cancer pathways, onco-genes, and tumor suppressors (cancer genes) bymodeling their effects on the activity of transcriptionfactors, RNA-binding proteins, and microRNAs in5,185 TCGA tumors and 1,019 ENCODE assays.Our predictions included hundreds of candidateonco- and tumor-suppressor lncRNAs (cancerlncRNAs) whose somatic alterations account for thedysregulation of dozens of cancer genes and path-ways in each of 14 tumor contexts. To demonstrateproof of concept, we showed that perturbations tar-geting OIP5-AS1 (an inferred tumor suppressor) andTUG1 and WT1-AS (inferred onco-lncRNAs) dysre-gulated cancer genes and altered proliferation ofbreast and gynecologic cancer cells. Our analysis in-dicates that, although most lncRNAs are dysregu-lated in a tumor-specific manner, some, includingOIP5-AS1, TUG1, NEAT1, MEG3, and TSIX, synergis-tically dysregulate cancer pathways in multiple tumorcontexts

Pan-cancer Alterations of the MYC Oncogene and Its Proximal Network across the Cancer Genome Atlas

Although theMYConcogene has been implicated incancer, a systematic assessment of alterations ofMYC, related transcription factors, and co-regulatoryproteins, forming the proximal MYC network (PMN),across human cancers is lacking. Using computa-tional approaches, we define genomic and proteo-mic features associated with MYC and the PMNacross the 33 cancers of The Cancer Genome Atlas.Pan-cancer, 28% of all samples had at least one ofthe MYC paralogs amplified. In contrast, the MYCantagonists MGA and MNT were the most frequentlymutated or deleted members, proposing a roleas tumor suppressors.MYCalterations were mutu-ally exclusive withPIK3CA,PTEN,APC,orBRAFalterations, suggesting that MYC is a distinct onco-genic driver. Expression analysis revealed MYC-associated pathways in tumor subtypes, such asimmune response and growth factor signaling; chro-matin, translation, and DNA replication/repair wereconserved pan-cancer. This analysis reveals insightsinto MYC biology and is a reference for biomarkersand therapeutics for cancers with alterations ofMYC or the PMN