Variability of the conserved V3 loop tip motif in HIV-1 subtype B isolates collected from Brazilian and French patients

The diversity of the V3 loop tip motif sequences of HIV-1 subtype B was analyzed in patients from Botucatu (Brazil) and Montpellier (France). Overall, 37 tetrameric tip motifs were identified, 28 and 17 of them being recognized in Brazilian and French patients, respectively. The GPGR (P) motif was predominant in French but not in Brazilian patients (53.5% vs 31.0%), whereas the GWGR (W) motif was frequent in Brazilian patients (23.0%) and absent in French patients. Three tip motif groups were considered: P, W, and non-P non-W groups. The distribution of HIV-1 isolates into the three groups was significantly different between isolates from Botucatu and from Montpellier (P < 0.001). A higher proportion of CXCR4-using HIV-1 (X4 variants) was observed in the non-P non-W group as compared with the P group (37.5% vs 19.1%), and no X4 variant was identified in the W group (P < 0.001). The higher proportion of X4 variants in the non-P non-W group was essentially observed among the patients from Montpellier, who have been infected with HIV-1 for a longer period of time than those from Botucatu. Among patients from Montpellier, CD4+ cell counts were lower in patients belonging to the non-P non-W group than in those belonging to the P group (24 cells/µL vs 197 cells/µL; P = 0.005). Taken together, the results suggest that variability of the V3 loop tip motif may be related to HIV-1 coreceptor usage and to disease progression. However, as analyzed by a bioinformatic method, the substitution of the V3 loop tip motif of the subtype B consensus sequence with the different tip motifs identified in the present study was not sufficient to induce a change in HIV-1 coreceptor usage.

Polymorphic Sites at the 3 ' Untranslated Region of the HLA-G Gene Are Associated with Differential hla-g Soluble Levels in the Brazilian and French Population

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Checklist of helminths from lizards and amphisbaenians (Reptilia, Squamata) of South America

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Microsatellite analysis supports clonal propagation and reduced divergence of Trypanosoma vivax from asymptomatic to fatally infected livestock in South America compared to West Africa

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Profile of IL-2, IL-4, IL-10, IFN- ? , TNF- ? and KC-like cytokines in pregnant bitches

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Assessing the above-ground biomass of a complex tropical rainforest using a canopy crane

Current estimates of the total biomass in tropical rainforests vary considerably; this is due in large part to the different approaches that are used to calculate biomass. In this study we have used a canopy crane to measure the tree architectures in a 1 ha plot of complex mesophyll vine forest at Cape Tribulation, Australia. Methods were developed to measure and calculate the crown and stem biomass of six major species of tree and palm (Alstonia scholaris (Apocynaceae), Cleistanthus myrianthus (Euphorbiaceae), Endiandra microneura (Lauraceae), Myristica insipida (Myristicaceae), Acmena graveolens (Myrtaceae), Normanbya normanbyi (Arecaceae)) using the unique access provided by the crane. This has allowed the first non-destructive biomass estimate to be carried out for a forest of this type. Allometric equations which relate tree biomass to the measured variable 'diameter at breast height' were developed for the six species, and a general equation was also developed for trees on the plot. The general equation was similar in form to equations developed for tropical rainforests in Brazil and New Guinea. The species equations were applied at the level of families, the generalized equation was applied to the remaining species which allowed the biomass of a total of 680 trees to be calculated. This has provided a current estimate of 270 t ha-1 above-ground biomass at the Australian Canopy Crane site; a value comparable to lowland rainforests in Panama and French Guiana. Using the same tree database seven alternative allometric equations (literature equations for tropical rainforests) were used to calculate the site biomass, the range was large (252-446 t ha-1) with only three equations providing estimates within 34 t ha-1 (12.5%) of the site value. Our use of multiple species-specific allometric equations has provided a site estimate only slightly larger (1%) than that obtained using allometric equations developed specifically for tropical wet rainforests. We have demonstrated that it is possible to non-destructively measure the biomass in a complex forest using an on-site canopy crane. In conjunction the development of crown maps and a detailed tree architecture database allows changes in forest structure to be followed quantitatively. © 2007 Ecological Society of Australia.

Fraseologismos zoônimos: elaboração de base de dados Português-Francês

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Proposta de modelo de dicionário bilíngue português-francês/francês-português de termos de estatutos sociais: uma colaboração para tradudores juramentados

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Descrições portuguesas e francesas acerca dos nativos da costa brasileira entre 1549 e 1615: aproximações e distanciamentos desses olhares

Pós-graduação em História - FCHS

A concepção de arte em Lima Barreto e Leon Tolstói: divergências e convergências

Pós-graduação em Letras - FCLAS

A França nas crônicas de Mário de Andrade: o nacional e o estrangeiro no periódico Diário Nacional (1929-1932)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A vulnerabilidade no esporte e a exposição às novas mídias: um estudo sobre o twitter

Pós-graduação em Desenvolvimento Humano e Tecnologias - IBRC

Segredos do sotão: feminismo e escritura na obra de Kate Chopin

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Uma análise discursiva do vocabulário jurídico em ações cíveis públicas por improbidade administrativa

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Antonio Candido, leitor de poesia fin-de-siècle

Este artigo objetiva, a partir de estudos de Antonio Candido voltados para a poesia lírica fin-de-siècle, brasileira e francesa, rastrear o modo pelo qual o autor articula Simbolismo e Modernismo. Tal veio do pensamento estético e crítico-teórico de Candido (com a respectiva prática analítica de textos poéticos) não foi tão valorizado quanto os eixos “árcade/romântico” e “modernista” que fundamentam sua vasta obra. No entanto, revela-se da maior importância na medida em que confi gura um “eixo intermediário” propício a uma nova apreciação do Simbolismo no Brasil.