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Registros recuperados: 9
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Bone morphogenetic proteins: from structure to clinical use BJMBR
Granjeiro,J.M.; Oliveira,R.C.; Bustos-Valenzuela,J.C.; Sogayar,M.C.; Taga,R..
Bone morphogenetic proteins (BMPs) are multi-functional growth factors belonging to the transforming growth factor ß superfamily. Family members are expressed during limb development, endochondral ossification, early fracture, and cartilage repair. The activity of BMPs was first identified in the 1960s but the proteins responsible for bone induction were unknown until the purification and cloning of human BMPs in the 1980s. To date, about 15 BMP family members have been identified and characterized. The signal triggered by BMPs is transduced through serine/threonine kinase receptors, type I and II subtypes. Three type I receptors have been shown to bind BMP ligands, namely: type IA and IB BMP receptors and type IA activin receptors. BMPs seem to be...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bone morphogenetic proteins; Osteogenic protein; Protein structure; Meta-analysis; Clinical trial.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005001000003
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Functional analysis of newly discovered growth control genes: experimental approaches BJMBR
Flatschart,R.B.; Sogayar,M.C..
A large number of DNA sequences corresponding to human and animal transcripts have been filed in data banks, as cDNAs or ESTs (expression sequence tags). However, the actual function of their corresponding gene products is still largely unknown. Several of these genes may play a role in regulation of important biological processes such as cell division, differentiation, malignant transformation and oncogenesis. Elucidation of gene function is based on 2 main approaches, namely, overexpression and expression interference, which respectively mimick or suppress a given phenotype. The currently available tools and experimental approaches to gene functional analysis and the most recent advances in mass cDNA screening by functional analysis are discussed.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gene function; Transgene overexpression; Expression interference; Antisense; Ribozymes; Transgenic cells and animals; Genetic knock-out.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000700011
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Hunting for differentially expressed genes BJMBR
Vedoy,C.G.; Bengtson,M.H.; Sogayar,M.C..
Differentially expressed genes are usually identified by comparing steady-state mRNA concentrations. Several methods have been used for this purpose, including differential hybridization, cDNA subtraction, differential display and, more recently, DNA chips. Subtractive hybridization has significantly improved after the polymerase chain reaction was incorporated into the original method and many new protocols have been established. Recently, the availability of the well-known coding sequences for some organisms has greatly facilitated gene expression analysis using high-density microarrays. Here, we describe some of these modifications and discuss the benefits and drawbacks of the various methods corresponding to the main advances in this field.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Differential gene expression; Differential hybridization; Differential display/DDRT; Subtraction hybridization; Suppressive PCR; DNA microarrays/chips.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000700012
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Mechanisms of cell transformation induced by polyomavirus BJMBR
Oliveira,M.L.S.; Brochado,S.M.; Sogayar,M.C..
Polyomavirus is a DNA tumor virus that induces a variety of tumors in mice. Its genome encodes three proteins, namely large T (LT), middle T (MT), and small T (ST) antigens, that have been implicated in cell transformation and tumorigenesis. LT is associated with cell immortalization, whereas MT plays an essential role in cell transformation by binding to and activating several cytoplasmic proteins that participate in growth factor-induced mitogenic signal transduction to the nucleus. The use of different MT mutants has led to the identification of MT-binding proteins as well as analysis of their importance during cell transformation. Studying the molecular mechanisms of cell transformation by MT has contributed to a better understanding of cell cycle...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Signal transduction; Malignant transformation; Polyomavirus T antigens; Polyomavirus-induced transcriptional control.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000700010
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Microencapsulation and tissue engineering as an alternative treatment of diabetes BJMBR
Maria-Engler,S.S.; Mares-Guia,M.; Correa,M.L.C.; Oliveira,E.M.C.; Aita,C.A.M.; Krogh,K.; Genzini,T.; Miranda,M.P.; Ribeiro,M.; Vilela,L.; Noronha,I.L.; Eliaschewitz,F.G.; Sogayar,M.C..
In the 70's, pancreatic islet transplantation arose as an attractive alternative to restore normoglycemia; however, the scarcity of donors and difficulties with allotransplants, even under immunosuppressive treatment, greatly hampered the use of this alternative. Several materials and devices have been developed to circumvent the problem of islet rejection by the recipient, but, so far, none has proved to be totally effective. A major barrier to transpose is the highly organized islet architecture and its physical and chemical setting in the pancreatic parenchyma. In order to tackle this problem, we assembled a multidisciplinary team that has been working towards setting up the Human Pancreatic Islets Unit at the Chemistry Institute of the University of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Human pancreatic islets; Pancreas; Extracellular matrix; Stem cells; Islet microencapsulation; Transplantation; Ductal cells.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000600001
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Oncogene-mediated downregulation of RECK, a novel transformation suppressor gene BJMBR
Sasahara,R.M.; Takahashi,C.; Sogayar,M.C.; Noda,M..
The RECK gene was initially isolated as a transformation suppressor gene encoding a novel membrane-anchored glycoprotein and later found to suppress tumor invasion and metastasis by regulating matrix metalloproteinase-9. Its expression is ubiquitous in normal tissues, but undetectable in many tumor cell lines and in fibroblastic lines transformed by various oncogenes. The RECK gene promoter has been cloned and characterized. One of the elements responsible for the oncogene-mediated downregulation of mouse RECK gene is the Sp1 site, where the Sp1 and Sp3 factors bind. Sp1 transcription factor family is involved in the basal level of promoter activity of many genes, as well as in dynamic regulation of gene expression; in a majority of cases as a positive...
Tipo: Info:eu-repo/semantics/article Palavras-chave: RECK transformation suppressor gene; Reversion; Transcriptional regulation; Sp1 family; Tumor suppressor genes.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000700014
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The GATO gene annotation tool for research laboratories BJMBR
Fujita,A.; Massirer,K.B.; Durham,A.M.; Ferreira,C.E.; Sogayar,M.C..
Large-scale genome projects have generated a rapidly increasing number of DNA sequences. Therefore, development of computational methods to rapidly analyze these sequences is essential for progress in genomic research. Here we present an automatic annotation system for preliminary analysis of DNA sequences. The gene annotation tool (GATO) is a Bioinformatics pipeline designed to facilitate routine functional annotation and easy access to annotated genes. It was designed in view of the frequent need of genomic researchers to access data pertaining to a common set of genes. In the GATO system, annotation is generated by querying some of the Web-accessible resources and the information is stored in a local database, which keeps a record of all previous...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Gene annotation tool; (GATO); Automatic annotation; Pipeline; Bioinformatics.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005001100002
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VP22 herpes simplex virus protein can transduce proteins into stem cells BJMBR
Gabanyi,I.; Lojudice,F.H.; Kossugue,P.M.; Rebelato,E.; Demasi,M.A.; Sogayar,M.C..
The type I herpes simplex virus VP22 tegument protein is abundant and well known for its ability to translocate proteins from one cell to the other. In spite of some reports questioning its ability to translocate proteins by attributing the results observed to fixation artifacts or simple attachment to the cell membrane, VP22 has been used to deliver several proteins into different cell types, triggering the expected cell response. However, the question of the ability of VP22 to enter stem cells has not been addressed. We investigated whether VP22 could be used as a tool to be applied in stem cell research and differentiation due to its capacity to internalize other proteins without altering the cell genome. We generated a VP22.eGFP construct to evaluate...
Tipo: Info:eu-repo/semantics/article Palavras-chave: VP22 protein delivery; Protein transducing domain; EGFP; Stem cells transduction; Cell differentiation.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000200121
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Where do we aspire to publish? A position paper on scientific communication in biochemistry and molecular biology BJMBR
Baptista,M.S.; Alves,M.J.M.; Arantes,G.M.; Armelin,H.A.; Augusto,O.; Baldini,R.L.; Basseres,D.S.; Bechara,E.J.H.; Bruni-Cardoso,A.; Chaimovich,H.; Colepicolo Neto,P.; Colli,W.; Cuccovia,I.M.; Da-Silva,A.M.; Di Mascio,P.; Farah,S.C.; Ferreira,C.; Forti,F.L.; Giordano,R.J.; Gomes,S.L.; Gueiros Filho,F.J.; Hoch,N.C.; Hotta,C.T.; Labriola,L.; Lameu,C.; Machini,M.T.; Malnic,B.; Marana,S.R.; Medeiros,M.H.G.; Meotti,F.C.; Miyamoto,S.; Oliveira,C.C.; Souza-Pinto,N.C.; Reis,E.M.; Ronsein,G.E.; Salinas,R.K.; Schechtman,D.; Schreier,S.; Setubal,J.C.; Sogayar,M.C.; Souza,G.M.; Terra,W.R.; Truzzi,D.R.; Ulrich,H.; Verjovski-Almeida,S.; Winck,F.V.; Zingales,B.; Kowaltowski,A.J..
The scientific publication landscape is changing quickly, with an enormous increase in options and models. Articles can be published in a complex variety of journals that differ in their presentation format (online-only or in-print), editorial organizations that maintain them (commercial and/or society-based), editorial handling (academic or professional editors), editorial board composition (academic or professional), payment options to cover editorial costs (open access or pay-to-read), indexation, visibility, branding, and other aspects. Additionally, online submissions of non-revised versions of manuscripts prior to seeking publication in a peer-reviewed journal (a practice known as pre-printing) are a growing trend in biological sciences. In this...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Scientific journals; Scientific editing; Pre-prints; Open access; Peer review.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2019000900401
Registros recuperados: 9
Primeira ... 1 ... Última
 

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