Consulta: creatorFacets:"Carvalho,H.F."
Registros recuperados: 4
Data/hora: 11/06/2024 16:36:33

Aggrecan structure in amphibian cartilage
Provedor de dados: 56
Autores: Covizi,D.Z.; Carvalho,H.F.
The structure of the large proteoglycan present in the bullfrog epiphyseal cartilage was studied by immunochemical and biochemical methods. The isolated monomer showed a polydisperse behavior on Sepharose CL2B, with a peak at Kav = 0.14. Chondroitin sulfate chains were identified by HPLC analysis of the products formed by chondroitinase digestion and mercuric acetate treatment. These chains have approximately 38 disaccharides, a Di45:Di68 ratio of 1.6 and GalNAc4S + GalNAc4,6S are the main non-reducing terminals. Keratan sulfate was identified by the use of two monoclonal antibodies in Western blots after chondroitinase ABC treatment. A keratan sulfate-rich region (~110 kDa) was isolated by sequential treatment with chondroitinase ABC and proteases. We...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aggrecan; Bullfrog; Cartilage; Chondroitin sulfate; Epiphyseal cartilage.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000001200002

Early effects of estrogen on the rat ventral prostate
Provedor de dados: 56
Autores: García-Flórez,M.; Oliveira,C.A.; Carvalho,H.F.
Complex interactions between androgen and estrogen (E2) regulate prostatic development and physiology. We analyzed the early effects of a high single dose of E2 (25 mg/kg body weight) and castration (separately or combined) on the adult 90-day-old male Wistar rat ventral prostate. Androgen levels, prostate weight, and the variation in the relative and absolute volume of tissue compartments and apoptotic indices were determined for 7 days. Castration and exogenous E2 markedly reduced ventral prostate weight (about 50% of the control), with a significant reduction in the epithelial compartment and increased stroma. The final volume of the epithelium was identical at day 7 for all treatments (58.5% of the control). However, E2 had an immediate effect, causing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apoptosis; Estrogen; Prostate; Stereology; Tissue kinetics.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000400002

Death switch for gene therapy: application to erythropoietin transgene expression
Provedor de dados: 56
Autores: Souza,D.S.; Spencer,D.M.; Salles,T.S.I.; Salomão,M.A.; Payen,E.; Beuzard,Y.; Carvalho,H.F.; Costa,F.F.; Saad,S.T.Olalla.
The effectiveness of the caspase-9-based artificial "death switch" as a safety measure for gene therapy based on the erythropoietin (Epo) hormone was tested in vitro and in vivo using the chemical inducer of dimerization, AP20187. Plasmids encoding the dimeric murine Epo, the tetracycline-controlled transactivator and inducible caspase 9 (ptet-mEpoD, ptet-tTAk and pSH1/Sn-E-Fv’-Fvls-casp9-E, respectively) were used in this study. AP20187 induced apoptosis of iCasp9-modified C2C12 myoblasts. In vivo, two groups of male C57BI/6 mice, 8-12 weeks old, were injected intramuscularly with 5 µg/50 g ptet-mEpoD and 0.5 µg/50 g ptet-tTAk. There were 20 animals in group 1 and 36 animals in group 2. Animals from group 2 were also injected with the 6 µg/50 g iCasp9...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gene therapy; Erythropoietin; Death switch; Caspase 9; AP20187; Anemia.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010000700005

The prima donna of epigenetics: the regulation of gene expression by DNA methylation
Provedor de dados: 56
Autores: Santos,K.F.; Mazzola,T.N.; Carvalho,H.F.
This review focuses on the mechanisms of DNA methylation, DNA methylation pattern formation and their involvement in gene regulation. Association of DNA methylation with imprinting, embryonic development and human diseases is discussed. Furthermore, besides considering changes in DNA methylation as mechanisms of disease, the role of epigenetics in general and DNA methylation in particular in transgenerational carcinogenesis, in memory formation and behavior establishment are brought about as mechanisms based on the cellular memory of gene expression patterns.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Epigenetics; DNA methylation; Inheritable changes in gene expression; Transgenerational carcinogenesis; Environmental influence on memory formation.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005001000010