RESUMO
Dentinogenesis imperfecta (DI) is the main orodental manifestation of osteogenesis imperfecta (OI) caused by COL1A1 or COL1A2 heterozygous pathogenic variants. Its prevalence varies according to the studied population. Here, we report the molecular analysis of 81 patients with OI followed at reference centers in Brazil and France presenting COL1A1 or COL1A2 variants. Patients were submitted to clinical and radiographic dental examinations to diagnose the presence of DI. In addition, a systematic literature search and a descriptive statistical analysis were performed to investigate OI/DI phenotype-genotype correlation in a worldwide sample. In our cohort, 50 patients had COL1A1 pathogenic variants, and 31 patients had COL1A2 variants. A total of 25 novel variants were identified. Overall, data from a total of 906 individuals with OI were assessed. Results show that DI was more frequent in severe and moderate OI cases. DI prevalence was also more often associated with COL1A2 (67.6%) than with COL1A1 variants (45.4%) because COL1A2 variants mainly lead to qualitative defects that predispose to DI more than quantitative defects. For the first time, 4 DI hotspots were identified. In addition, we showed that 1) glycine substitution by branched and charged amino acids in the α2(I) chain and 2) substitutions occurring in major ligand binding regions-MLRB2 in α1(I) and MLBR 3 in α2(I)-could significantly predict DI (P < 0.05). The accumulated variant data analysis in this study provides a further basis for increasing our comprehension to better predict the occurrence and severity of DI and appropriate OI patient management.
Assuntos
Cadeia alfa 1 do Colágeno Tipo I , Colágeno Tipo I , Dentinogênese Imperfeita , Osteogênese Imperfeita , Humanos , Colágeno Tipo I/genética , Dentinogênese Imperfeita/genética , Estudos de Associação Genética , Mutação , Osteogênese Imperfeita/diagnóstico por imagem , Osteogênese Imperfeita/genéticaRESUMO
BACKGROUND: Herpes simplex virus (HSV) and poliovirus (PV) are both agents of major concern in the public health system. It has been shown that Dimorphandra gardneriana galactomannans can be used as solubilizer vehicles in the manufacturing of medicine. Mangiferin is the major constituent of Mangifera indica and presents multiple medicinal and biological activities. OBJECTIVE: This study assayed the effect of D. gardneriana galactomannan combined with mangiferin (DgGmM) against HSV-1 and PV-1. METHODS: The DgGmM cytotoxicity was evaluated by the colorimetric MTT method and the antiviral activity by plaque reduction assay, immunofluorescence and polymerase chain reaction (PCR), in HEp-2 cells. RESULTS: The DgGmM showed a 50% cytotoxic concentration (CC50) > 2000 µg/mL. The 50% inhibitory concentrations (IC50) for HSV-1 and PV-1 were, respectively, 287.5 µg/mL and 206.2 µg/mL, with selectivity indexes (SI) > 6.95 for the former and > 9.69 for the latter. The DgGmM time-ofaddition protocol for HSV-1 showed a maximum inhibition at 500 µg/mL, when added concomitantly to infection and at the time 1 h post-infection (pi). While for PV-1, for the same protocol, the greatest inhibition, was also observed concomitantly to infection at 500 µg/mL and at the times 4 h and 8 h pi. The inhibition was also demonstrated by the decrease of fluorescent cells and/or the inhibition of specific viral genome. CONCLUSION: These results suggested that the DgGmM inhibited HSV-1 and PV-1 replication, with low cytotoxicity and high selectivity and, therefore, represents a potential candidate for further studies on the control of herpes and polio infections.
Assuntos
Antivirais/administração & dosagem , Herpesvirus Humano 1/efeitos dos fármacos , Mananas/administração & dosagem , Extratos Vegetais/administração & dosagem , Xantonas/administração & dosagem , Antivirais/isolamento & purificação , Relação Dose-Resposta a Droga , Quimioterapia Combinada , Galactose/análogos & derivados , Células Hep G2 , Herpes Simples/tratamento farmacológico , Herpesvirus Humano 1/fisiologia , Humanos , Mananas/isolamento & purificação , Extratos Vegetais/isolamento & purificação , Poliovirus/efeitos dos fármacos , Replicação Viral/efeitos dos fármacos , Replicação Viral/fisiologia , Xantonas/isolamento & purificaçãoRESUMO
RESUMO O objetivo deste trabalho foi apresentar, em ordem alfabética, uma relação de palavras-chave e key words dos trabalhos publicados na revista "Arquivos do Instituto Biológico", que datam de 2005. Estabeleceu-se, em média, 3 palavras-chave por trabalho, totalizando 364, com 435 citações bibliográficas.
ABSTRACT This is a list of the key words of the papers publiched in the "Arquivos do Instituto Biológico" in 2005. This publiched select 364 key words and 435 references.
RESUMO
PURPOSE: To evaluate 2 left ventricular mass index (LVMI) normality criteria for the prevalence of left ventricular geometric patterns in a hypertensive population ( HT ). METHODS: 544 essential hypertensive patients, were evaluated by echocardiography, and different left ventricular hypertrophy criteria were applied: 1 - classic : men - 134 g/m2 and women - 110 g/m2; 2- obtained from the 95th percentil of LVMI from a normotensive population (NT). RESULTS: The prevalence of 4 left ventricular geometric patterns, respectively for criteria 1 and 2, were: normal geometry - 47.7% and 39.3%; concentric remodelying - 25.4% and 14.3%; concentric hypertrophy - 18.4% and 27.7% and excentric hypertrophy - 8.8% and 16.7%, which confered abnormal geometry to 52.6% and 60.7% of hypertensive. The comparative analysis between NT and normal geometry hypertensive group according to criteria 1, detected significative stuctural differences,"( *p < 0.05):LVMI- 78.4 +/- 1.50 vs 85.9 +/-0.95 g/m2 *; posterior wall thickness -8.5 +/- 0.1 vs 8.9 +/- 0.05 mm*; left atrium - 33.3 +/- 0.41 vs 34.7 +/- 0.30 mm *. With criteria 2, significative structural differences between the 2 groups were not observed. CONCLUSION: The use of a reference population based criteria, increased the abnormal left ventricular geometry prevalence in hypertensive patients and seemed more appropriate for left ventricular hypertrophy detection and risk stratification.
Assuntos
Hipertensão/diagnóstico por imagem , Hipertrofia Ventricular Esquerda/diagnóstico por imagem , Análise de Variância , Estudos de Casos e Controles , Distribuição de Qui-Quadrado , Ecocardiografia Doppler , Feminino , Ventrículos do Coração/diagnóstico por imagem , Ventrículos do Coração/patologia , Humanos , Masculino , Seleção de Pacientes , Estudos Retrospectivos , Medição de RiscoRESUMO
Four Lentinula edodes strains (Le10, 46, K2, Assai) were assessed for their antagonistic effect on four filamentous fungus species of agricultural importance (Helminthosporium euphorbiae, Helminthosporium sp, Fusarium solani and Phomopsis sojae) and on Alagoas serotype of Vesicular Stomatitis Virus (VSA). The L. edodes strains studied had variable effects on the filamentous fungi and on VSA. The K2 and Le10 strains were antagonistic on the fungi assessed and the 46 and K2 strains were efficient on the Vesicular Stomatitis Virus. The results widened the list of beneficial effects of L. edodes on the control and prevention of animal pathogenic virus and filamentous fungi.
Assuntos
Fungos , Lentinula , Vírus da Estomatite Vesicular IndianaRESUMO
Authors present the case of a 37-year-old man admitted to the emergency room of Universidade Federal de São Paulo-Escola Paulista de Medicina, with hyperosmolar coma, following progressive muscle discomfort and loss of renal function, with further need of dialysis therapy. Initial laboratory evaluation showed marked hyperglycemia, hypernatremia, hyperosmolarity, and high levels of creatinine. In the evolution he presented an elevation of creatino-phosphokinase levels in parallel with increasing levels of urea and creatinine. Urinalyses showed progressive increase in proteinuria and hematuria. A muscle biopsy was performed and confirmed the presence of muscular necrosis. The purpose of this paper is to emphasize hyperosmolarity as a newly described cause of rhabdomyolysis. The authors point out its multifactorial physiopathology and also stress the relatively common occurrence of acute renal failure (ARF) following an episode of rhabdomyolysis, and the poor prognosis that this complication represents.
Assuntos
Injúria Renal Aguda/etiologia , Rabdomiólise/complicações , Desequilíbrio Hidroeletrolítico/complicações , Injúria Renal Aguda/diagnóstico , Injúria Renal Aguda/terapia , Adulto , Diagnóstico Diferencial , Intervalo Livre de Doença , Humanos , Masculino , Concentração Osmolar , Diálise Renal , Rabdomiólise/diagnóstico , Rabdomiólise/terapia , Desequilíbrio Hidroeletrolítico/diagnóstico , Desequilíbrio Hidroeletrolítico/terapiaRESUMO
Oxyygen free radicals are highly reactive species that damage several cellular macromolecules and organelles, including membrane lipid peroxidation and produce DNA lesions. We have discussed here; i) The mechanism of radiation-induced cellular damage in bacteria through the intermediation of active oxygen species; ii) the cellular inactivation and the role of bacterial SOS and OxyR systems in the repair of lesions induced by H2O2 under low iron condition; iii) the lethal interaction between H2O2 and o-phenanthroline in E. coli; iv) the biological response induced by near-UV radiation mediated by active oxygen species and finally v) the mutagenic potential of popular plant extracts like guaraná (Paullinia cupana), mate (Ilex paraguariensis) and saiao (Kalanchoe brasiliensis), whose effects are eventually mediated by active oxygen species.