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Avaliação dos efeitos antiinflamatórios da proteína antagonista de receptor de interleucina - 1 (IRAP) por citometria de fluxo em líquido sinovial de eqüino; Evaluation of the anti-inflammatory effects of the interleukin-1 receptor antagonist protein in equine synovial fluid using flow cytometric techniques

Brossi, Patrícia Monaco
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 31/07/2007 Português
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A doença articular, especificamente a osteoartrite é uma das enfermidades mais prevalentes e mais debilitantes que acomete os cavalos, tendo um grande impacto econômico na indústria eqüina. Assim sendo, a investigação contínua e avanços na área terapêutica são de fundamental importância. A osteoartrite é uma doença degenerativa que pode ser deflagrada por uma série de fatores e onde, ultimamente, todos os tecidos articulares encontram-se comprometidos. Não obstante, é na degradação da matriz extracelular da cartilagem articular que ocorrem os eventos de maior expressão e repercussão. Na gênese da degradação da matriz extracelular encontra-se um desequilíbrio entre os processos anabólicos e catabólicos responsáveis pela homeostase normal da cartilagem articular e pela adaptação deste tecido às forças que sobre ele incidem. Estes processos são orquestrados por proteínas anabólicas, como, por exemplo o fator de crescimento tipo insulina 1 (IGF-l), e por citocinas inflamatórias que, de forma contrária, são responsáveis pela depleção de colágeno e de proteoglicanas da matriz, representando o grupo de proteínas catabólicas, cujo exemplo clássico é a interleucina-1. A interleucina-1 tem papel central nos processos fisiopatológicos da osteoartrite por desencadear vários eventos catabólicos nos sinoviócitos e condrócitos...

Localização e tráfego subcelular de aminopeptidases em adipócitos de ratos obesos e privados de alimento; Subcelular localization and trafficking of aminopeptidases in adipocytes of obese and food deprived rats

Vendrame, Rafaela Fadoni Alponti
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 03/04/2013 Português
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18.28%
A descoberta de aminopeptidase regulada por insulina (IRAP), a qual hidrolisa peptídeos como ocitocina e vasopressina e é receptora de angiotensina IV, destaca a importância do estudo do envolvimento de peptidases na função endócrina do adipócito. Estudos recentes detectaram alterações das atividades de aminopeptidase neutra e de dipeptidil peptidase IV (DPPIV) no plasma e no hipotálamo e hipocampo na obesidade induzida por glutamato monossódico (MSG). A presente tese propôs (i) a existência de atividades aminopeptidásicas ácida (APA), básica (APB), neutra insensível (APM) e sensível à puromicina (PSA), metionil (MetAP) e DPPIV, além da já conhecida (leucil (LAP)/cistil (CAP)/IRAP), nas frações de membrana plasmática (FM) e de alta (HDM) e baixa (LDM) densidade microssomal de adipócitos isolados do depósito de gordura retroperitoneal; (ii) que suas atividades catalíticas, expressões gênicas e tráfego subcelular seriam diferenciados entre obesos induzidos por MSG, submetidos ou não à privação alimentar e em animais controle sadios, submetidos ou não a privação alimentar; (iii) e influenciadas por insulina, angiotensina II, angiotensina IV e vasopressina. A existência de todas essas aminopeptidases no adipócito foi demonstrada...

Efficiency of IRAP and ITS-RFLP marker systems in accessing genetic variation of Pyrenophora graminea

Zein,Imad; Jawhar,Mohammed; Arabi,Mohammed Imad Eddin
Fonte: Sociedade Brasileira de Genética Publicador: Sociedade Brasileira de Genética
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2010 Português
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37.97%
The usefulness of IRAP (inter-retrotransposon amplified polymorphism) and ITS-RFLP (restriction of PCR-amplified internal transcribed spacers of the rDNA) markers in the analysis of 39 Pyrenophora graminea isolates was determined. Each marker system could discriminate between all of the isolates in detecting polymorphism, albeit with variable efficiency. IRAP and ITS-RFLP produced 85% and 77% polymorphic bands, respectively, with a corresponding mean polymorphic information content (PIC) of 0.38 and 0.36. The IRAP marker index ratio (2.41) was higher than ITS-RFLP (1.50). On one hand, the quality nature of data (QND) was higher for ITS-RFLP (0.169) than IRAP (0.093). However, correlation between both marker similarity matrices was significant (r = 0.34, p < 0.05). These findings suggest their combined use in phylogenetic analysis. To our knowledge, this is the first report of a comparison involving these two advanced DNA marker systems.

Genetic Diversity of Some Capparis L. Species Growing in Syria

Al- Safadi,Bassam; Faouri,Hussam; Elias,Rana
Fonte: Instituto de Tecnologia do Paraná - Tecpar Publicador: Instituto de Tecnologia do Paraná - Tecpar
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2014 Português
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This work investigated the genetic diversity and relationships among Capparis species growing in Syria using IRAP and ISSR techniques. Forty-seven samples of three Capparis species genotypes were collected from 21 different locations in Syria. The genotypes were morphologically identified based on the descriptions available in the literature. When IRAP technique was used, an average of 71.5% of the amplified fragments were polymorphic compared to 82.04% in ISSR. Morphological characterization along with the cluster and PCoA analyses of the data divided the studied genotypes into three groups. The groups included genotypes identified as Capparis spinosa L, C. sicula Duh., and C. aegyptia Lam. Based on the morphological description, molecular studies and statistical analyses of this study, C. aegyptia could be suggested as a separate species and not a varietal rank of C. spinosa (C. spinosa var. aegyptia (Lam.). Two samples (Alep1 and Idl) were not placed in any of the three distinctive groups, despite their closeness morphologically to C. spinosa. In PCoA analysis, sample Alep1 came between C. sicula and C. spinosa and Idl was placed between C. sicula and C. aegyptia. Although hybridization between Capparis species could occur, it was not clear from the present study if these two genotypes were hybrids.

p115 Interacts with the GLUT4 Vesicle Protein, IRAP, and Plays a Critical Role in Insulin-stimulated GLUT4 Translocation

Hosaka, Toshio; Brooks, Cydney C.; Presman, Eleonora; Kim, Suk-Kyeong; Zhang, Zidong; Breen, Michael; Gross, Danielle N.; Sztul, Elizabeth; Pilch, Paul F.
Fonte: The American Society for Cell Biology Publicador: The American Society for Cell Biology
Tipo: Artigo de Revista Científica
Publicado em /06/2005 Português
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Insulin-regulated aminopeptidase (IRAP) is an abundant cargo protein of Glut4 storage vesicles (GSVs) that traffics to and from the plasma membrane in response to insulin. We used the amino terminus cytoplasmic domain of IRAP, residues 1–109, as an affinity reagent to identify cytosolic proteins that might be involved in GSV trafficking. In this way, we identified p115, a peripheral membrane protein known to be involved in membrane trafficking. In murine adipocytes, we determined that p115 was localized to the perinuclear region by immunofluorescence and throughout the cell by fractionation. By immunofluorescence, p115 partially colocalizes with GLUT4 and IRAP in the perinuclear region of cultured fat cells. The amino terminus of p115 binds to IRAP and overexpression of a N-terminal construct results in its colocalization with GLUT4 throughout the cell. Insulin-stimulated GLUT4 translocation is completely inhibited under these conditions. Overexpression of p115 C-terminus has no significant effect on GLUT4 distribution and translocation. Finally, expression of the p115 N-terminus construct has no effect on the distribution and trafficking of GLUT1. These data suggest that p115 has an important and specific role in insulin-stimulated Glut4 translocation...

Tankyrase-2 oligomerizes with tankyrase-1 and binds to both TRF1 (telomere-repeat-binding factor 1) and IRAP (insulin-responsive aminopeptidase).

Sbodio, Juan I; Lodish, Harvey F; Chi, Nai-Wen
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em 01/02/2002 Português
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The poly(ADP-ribose) polymerase (PARP) tankyrase-1 contains an ankyrin-repeat domain that binds to various partners, including the telomeric protein TRF1 (telomere-repeat-binding factor 1) and the vesicular protein IRAP (insulin-responsive aminopeptidase). TRF1 binding recruits tankyrase-1 to telomeres and allows its PARP activity to regulate telomere homoeostasis. By contrast, IRAP binding and the Golgi co-localization of tankyrase-1 with IRAP might allow tankyrase-1 to affect the targeting of IRAP-containing vesicles. A closely related protein, tankyrase-2, has also been implicated in vesicular targeting. Unlike tankyrase-1, tankyrase-2 has not been shown to have PARP activity. In addition, it has not been implicated in telomere homoeostasis, because it did not interact with TRF1 in previous studies. Here we show that tankyrase-2 contains intrinsic PARP activity and, like tankryase-1, binds to both TRF1 and IRAP. Our analysis suggests that the ankyrin (ANK) domain of tankyrase-2 comprises five subdomains that provide redundant binding sites for IRAP. Moreover, tankyrase-2 associates and co-localizes with tankyrase-1, suggesting that both tankyrases might function as a complex. Taken together, our findings indicate that tankyrase-1 and tankyrase-2 interact with the same set of proteins and probably mediate overlapping functions...

Modulating RssB activity: IraP, a novel regulator of σS stability in Escherichia coli

Bougdour, Alexandre; Wickner, Sue; Gottesman, Susan
Fonte: Cold Spring Harbor Laboratory Press Publicador: Cold Spring Harbor Laboratory Press
Tipo: Artigo de Revista Científica
Publicado em 01/04/2006 Português
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The σS subunit of Escherichia coli RNA polymerase regulates the expression of stationary phase and stress response genes. σS is highly unstable in exponentially growing cells, whereas its stability increases dramatically upon starvation or under certain stress conditions. The degradation of σS is controlled by the phosphorylatable adaptor protein RssB and the ClpXP protease. RssB specifically directs σS to ClpXP. An unanswered question is how RssB-mediated degradation of σS is blocked by conditions such as glucose or phosphate starvation. We report here the identification and characterization of a new regulator of σS stability, IraP (inhibitor of RssB activity during phosphate starvation), that stabilizes σS both in vivo and in vitro. Deletion of iraP interferes with σS stabilization during phosphate starvation, but not during carbon starvation, and has a partial effect in stationary phase and nitrogen starvation. IraP interferes with RssB-dependent degradation of σS through a direct protein–protein interaction with RssB. A point mutant of IraP was isolated and found to be defective both for inhibition of σS degradation and interaction with RssB. Our results reveal a novel mechanism of regulation of σS stability through the regulation of RssB activity and identify IraP as a member of a new class of regulators...

Insulin-stimulated exocytosis of GLUT4 is enhanced by IRAP and its partner tankyrase

Yeh, Tsung-Yin J.; Sbodio, Juan I.; Tsun, Zhi-Yang; Luo, Biao; Chi, Nai-Wen
Fonte: Portland Press Ltd. Publicador: Portland Press Ltd.
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
28.14%
The glucose transporter GLUT4 and the aminopeptidase IRAP (insulin-responsive aminopeptidase) are the major cargo proteins of GSVs (GLUT4 storage vesicles) in adipocytes and myocytes. In the basal state, most GSVs are sequestered in perinuclear and other cytosolic compartments. Following insulin stimulation, GSVs undergo exocytic translocation to insert GLUT4 and IRAP into the plasma membrane. The mechanisms regulating GSV trafficking are not fully defined. In the present study, using 3T3-L1 adipocytes transfected with siRNAs (small interfering RNAs), we show that insulin-stimulated IRAP translocation remained intact despite substantial GLUT4 knockdown. By contrast, insulin-stimulated GLUT4 translocation was impaired upon IRAP knockdown, indicating that IRAP plays a role in GSV trafficking. We also show that knockdown of tankyrase, a Golgi-associated IRAP-binding protein that co-localizes with perinuclear GSVs, attenuated insulin-stimulated GSV translocation and glucose uptake without disrupting insulin-induced phosphorylation cascades. Moreover, iodixanol density gradient analyses revealed that tankyrase knockdown altered the basal-state partitioning of GLUT4 and IRAP within endosomal compartments, apparently by shifting both proteins toward less buoyant compartments. Importantly...

Immunohistochemical demonstration of interleukin-1 receptor antagonist protein and interleukin-1 in human lymphoid tissue and granulomas.

Chensue, S. W.; Warmington, K. S.; Berger, A. E.; Tracey, D. E.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /02/1992 Português
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18.14%
Human interleukin 1 receptor antagonist protein (IRAP) is a specific antagonist of interleukin 1 (IL-1) action in both in vitro and in vivo experimental models. Presently, the significance of this protein in human pathophysiology is unknown. In the present study, monoclonal antibodies against IRAP were prepared and used to demonstrate IRAP expression in human tissues, immunohistochemically. Specifically, this study focused on lymphoid tissues and granulomatous inflammatory reactions since IL-1 is believed to play roles in lymphocyte development and inflammation. In addition, these tissues were also stained for IL-1 beta to compare the expression of agonist and antagonist. These findings indicate that IRAP expression is largely limited to macrophages and their derivatives. Strong IRAP expression was observed in germinal center macrophages of lymph nodes, spleen, and tonsil. In contrast, IL-1 was marginally expressed in these organs. Granulomas associated with active M. tuberculosis infection, sarcoidosis and foreign bodies all contained strongly IRAP positive cells, which included macrophages, epithelioid cells and multinucleate giant cells. Unlike reactive lymphoid tissue, tuberculous and sarcoid granulomas also contained IL-1 positive cells which included macrophages and their derivatives...

ppGpp regulation of RpoS degradation via anti-adaptor protein IraP

Bougdour, Alexandre; Gottesman, Susan
Fonte: National Academy of Sciences Publicador: National Academy of Sciences
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
27.97%
IraP is a small protein that interferes with the delivery of σS (RpoS) to the ClpXP protease by blocking the action of RssB, an adaptor protein for σS degradation. IraP was previously shown to mediate stabilization of σS during phosphate starvation. Here, we show that iraP is transcribed in response to phosphate starvation; this response is mediated by ppGpp. The iraP promoter is positively regulated by ppGpp, dependent on the discriminator region of the iraP promoter. Sensing of phosphate starvation requires SpoT but not RelA. The results demonstrate a target for positive regulation by ppGpp and suggest that the cell use of ppGpp to mediate a variety of starvation responses operates in part by modulating σS levels.

Self-assembly of Glut4 Storage Vesicles during Differentiation of 3T3-L1 Adipocytes*

Shi, Jun; Huang, Guanrong; Kandror, Konstantin V.
Fonte: American Society for Biochemistry and Molecular Biology Publicador: American Society for Biochemistry and Molecular Biology
Tipo: Artigo de Revista Científica
Publicado em 31/10/2008 Português
Relevância na Pesquisa
18.14%
Glut4 storage vesicles (GSVs) represent translocation-competent vesicular carriers in fat and skeletal muscle cells that deliver Glut4 to the plasma membrane in response to insulin stimulation. GSVs include three major cargo proteins: Glut4, insulin-responsive aminopeptidase (IRAP), and sortilin. Previous work has suggested that the lumenal interaction between Glut4 and sortilin and the cytoplasmic interaction between sortilin and GGA adaptors play an important role in recruitment of Glut4 into the GSVs. However, the mechanism of IRAP targeting to this compartment remains unknown. To address this question, we show that in differentiating adipocytes IRAP enters the GSVs from the “donor” membranes on day 3 of differentiation. Forced expression of sortilin in undifferentiated cells does not recruit IRAP into the vesicles. However, double expression of sortilin and Glut4 reconstitutes functional GSVs that incorporate endogenous IRAP. To explain this process, we show by a yeast two-hybrid system and chemical cross-linking that the lumenal domain of IRAP can interact with the lumenal loop of Glut4. IRAP without the lumenal domain is faithfully targeted to the donor membranes but has significantly lower insulin responsiveness than full-length IRAP. We suggest that lumenal interactions between Glut4 and IRAP play an important role in the assembly of the GSVs.

Efficiency of IRAP and ITS-RFLP marker systems in accessing genetic variation of Pyrenophora graminea

Zein, Imad; Jawhar, Mohammed; Arabi, Mohammed Imad Eddin
Fonte: Sociedade Brasileira de Genética Publicador: Sociedade Brasileira de Genética
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
27.87%
The usefulness of IRAP (inter-retrotransposon amplified polymorphism) and ITS-RFLP (restriction of PCR-amplified internal transcribed spacers of the rDNA) markers in the analysis of 39 Pyrenophora graminea isolates was determined. Each marker system could discriminate between all of the isolates in detecting polymorphism, albeit with variable efficiency. IRAP and ITS-RFLP produced 85% and 77% polymorphic bands, respectively, with a corresponding mean polymorphic information content (PIC) of 0.38 and 0.36. The IRAP marker index ratio (2.41) was higher than ITS-RFLP (1.50). On one hand, the quality nature of data (QND) was higher for ITS-RFLP (0.169) than IRAP (0.093). However, correlation between both marker similarity matrices was significant (r = 0.34, p < 0.05). These findings suggest their combined use in phylogenetic analysis. To our knowledge, this is the first report of a comparison involving these two advanced DNA marker systems.

High glucose activates the alternative ACE2/Ang-(1-7)/Mas and APN/Ang IV/IRAP RAS axes in pancreatic β-cells

HÄRDTNER, CARMEN; MÖRKE, CAROLINE; WALTHER, REINHARD; WOLKE, CARMEN; LENDECKEL, UWE
Fonte: D.A. Spandidos Publicador: D.A. Spandidos
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
27.54%
The activation of the classical angiotensin (Ang)-converting enzyme (ACE)/Ang II/Ang II type 1 receptor (AT1R) axis of the renin-angiotensin system (RAS) has been associated with islet dysfunction and insulin resistance. Hyperglycaemia, hypertension and obesity, major components of metabolic syndrome, are all associated with increased systemic and tissue levels of Ang II. Whereas it is well established that Ang II, by binding to AT1R, impairs glucose-stimulated insulin secretion and insulin signaling, the contribution of alternative RAS axes to β-cell function remains to be fully elucidated. In this study, using the BRIN-BD11 rat insulinoma cell line, we i) examined the basal expression levels of components of classical and alternative RAS axes and ii) investigated the effects of normal (5.5 mM) and elevated (11, 15, 25 mM) glucose concentrations on their expression and/or enzymatic activity by means of reverse transcription quantitative PCR (RT-qPCR), immunoblot analysis and enzymatic activity assays. The results correlated with the insulin production and release. Essential components of all RAS axes were found to be expressed in the BRIN-BD11 cells. Components of the alternative RAS axes, ACE2, neutral endopeptidase 24.11, Mas receptor (Mas)...

Probing the S1 specificity pocket of the aminopeptidases that generate antigenic peptides: S1 specificity of ERAP1, ERAP2 and IRAP

Zervoudi, Efthalia; Papakyriakou, Athanasios; Georgiadou, Dimitra; Evnouchidou, Irini; Gajda, Anna; Poreba, Marcin; Salvesen, Guy S.; Drag, Marcin; Hattori, Akira; Swevers, Luc; Vourloumis, Dionisios; Stratikos, Efstratios
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em 15/04/2011 Português
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27.74%
ER aminopeptidase 1 (ERAP1), ER aminopeptidase 2 (ERAP2) and Insulin Regulated aminopeptidase (IRAP) are three homologous enzymes that play critical roles in the generation of antigenic peptides. These aminopeptidases excise amino acids from N-terminally extended precursors of antigenic peptides in order to generate the correct length epitopes for binding onto MHC class I molecules. The specificity of these peptidases can affect antigenic peptide selection, but has not yet been investigated in detail. In the present study we utilized a collection of 82 fluorogenic substrates to define a detailed selectivity profile for each of the three enzymes and to probe structural and functional features of the primary specificity (S1) pocket. Molecular modeling of the three S1 pockets reveals substrate-enzyme interactions that are critical determinants for specificity. The substrate selectivity profiles suggest that IRAP largely combines the S1 specificity of ERAP1 and ERAP2, consistent with its proposed biological function. IRAP however, does not achieve this dual specificity by simply combining structural features of ERAP1 and 2, but rather by a unique amino acid change at position 541. Our results provide insights on antigenic peptide selection and may prove valuable in designing selective inhibitors or activity markers for this class of enzymes.

Inhibition of Insulin-Regulated Aminopeptidase (IRAP) by Arylsulfonamides

Borhade, Sanjay R; Rosenström, Ulrika; Sävmarker, Jonas; Lundbäck, Thomas; Jenmalm-Jensen, Annika; Sigmundsson, Kristmundur; Axelsson, Hanna; Svensson, Fredrik; Konda, Vivek; Sköld, Christian; Larhed, Mats; Hallberg, Mathias
Fonte: Blackwell Publishing Ltd Publicador: Blackwell Publishing Ltd
Tipo: Artigo de Revista Científica
Português
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27.87%
The inhibition of insulin-regulated aminopeptidase (IRAP, EC 3.4.11.3) by angiotenesin IV is known to improve memory and learning in rats. Screening 10 500 low-molecular-weight compounds in an enzyme inhibition assay with IRAP from Chinese Hamster Ovary (CHO) cells provided an arylsulfonamide (N-(3-(1H-tetrazol-5-yl)phenyl)-4-bromo-5-chlorothiophene-2-sulfonamide), comprising a tetrazole in the meta position of the aromatic ring, as a hit. Analogues of this hit were synthesized, and their inhibitory capacities were determined. A small structure–activity relationship study revealed that the sulfonamide function and the tetrazole ring are crucial for IRAP inhibition. The inhibitors exhibited a moderate inhibitory potency with an IC50=1.1±0.5 μm for the best inhibitor in the series. Further optimization of this new class of IRAP inhibitors is required to make them attractive as research tools and as potential cognitive enhancers.

Recycling of IRAP from the plasma membrane back to the insulin-responsive compartment requires the Q-SNARE syntaxin 6 but not the GGA clathrin adaptors

Watson, Robert T.; Pessin, Jeffrey E.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em 15/04/2008 Português
Relevância na Pesquisa
28.1%
Insulin recruits two transmembrane proteins, GLUT4 and IRAP, to the plasma membrane of muscle cells and adipocytes. The subcellular trafficking and localization of GLUT4, and to a lesser extent IRAP, have been intensely studied, yet the molecular mechanisms responsible for their insulin-responsive compartmentalization remain unknown. Herein we have investigated the endocytosis and recycling of IRAP from the cell surface back to the insulin-responsive compartment (IRC). Our results show that a key dileucine motif at position 76,77 (LL76,77), although required for the initial biosynthetic entry of IRAP into the IRC, is dispensable for entry into the IRC via the endosomal system. Indeed, we found that an AA76,77 mutant of IRAP is fully capable of undergoing endocytosis and is correctly routed back to the IRC. To verify that the AA76,77 mutant enters the bona fide IRC, we show that the internalized IRAP-AA76,77 construct is sequestered in an IRC that is insensitive to brefeldin A yet sensitive to a dominant-interfering mutant of AS160 (AS160-4P). In addition, we show that the GGA clathrin adaptors are not required for the re-entry of IRAP from the cell surface back into the IRC, whereas the Q-SNARE syntaxin 6 is required for this process.

Desenvolvimento de "inter-retrotransposon amplified polymorphism" para análise de diversidade genética em germoplasma de mandioca.

SILVA, A. M. O. DA; SILVA, G. F. da; DIAS, M. C.; SOUZA, A.; CLEMENT, C. R.; SOUSA, N. R.
Fonte: In: CONGRESSO BRASILEIRO DE RECURSOS GENÉTICOS, 2., 2012. Anais. Belém, PA. 2012. Publicador: In: CONGRESSO BRASILEIRO DE RECURSOS GENÉTICOS, 2., 2012. Anais. Belém, PA. 2012.
Tipo: Artigo em anais de congresso (ALICE)
Português
Relevância na Pesquisa
27.74%
A mandioca, Manihot esculenta Crantz, possui importância econômica na maioria dos países tropicais e subtropicais. A variabilidade genética da espécie não foi totalmente explorada e novas informações podem ajudar a expandir seu uso. Os marcadores moleculares baseados em retrotransposons, devido a sua abundancia no genoma, permitem uma eficiente análise de diversidade genética. O IRAP (Inter-Retrotransposon Amplified Polymorphism) é baseado no polimorfismo entre retrotransposons, possui uma alta reprodutibilidade, elevado nível de polimorfismo e baixo custo. O objetivo deste trabalho foi desenvolver primers para IRAP em mandioca. Oito diferentes retrotransposons do tipo LTR foram selecionados para o desenvolvimento de IRAP e os primers baseados nestes elementos foram denominados de ME_1 a ME_8. Foram analisados 21 indivíduos (12 de Anori/AM, 6 Anamã/AM e 3 da Bahia) provenientes do banco de germoplasma de mandioca da Embrapa Amazônia Ocidental. O percentual de loci polimórficos, heterozigosidade esperada (*h) e o Índice de Shannon (*I) foram calculados usando o software PopGene 1.31. Dos oito primers desenvolvidos, dois deles (ME_1 e ME_3) produziram poucas e fracas bandas. Os demais primers produziram de 21 a 61 bandas com médias de 85% de polimorfismo (65...

Desenvolvimento de IRAP (Inter-Retrotransposon Amplified Polymorphism) para Mycosphaerella fijiensis.

QUEIROZ, C. B. de; GASPAROTTO, L.; SOUSA, N. R.; SILVA, G. F. da
Fonte: In: CONGRESSO BRASILEIRO DE RECURSOS GENÉTICOS; WORKSHOP EM BIOPROSPECÇÃO E CONSERVAÇÃO DE PLANTAS NATIVAS DO SEMI-ÁRIDO, 3.; WORKSHOP INTERNACIONAL SOBRE BIOENERGIA E MEIO AMBIENTE, 2010, Salvador. Bancos de germoplasma: descobrir a riqueza, garantir o futuro: anais. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2010. 1 CD-ROM. (Embrapa Recursos Genéticos e Biotecnologia. Documentos, 304). Publicador: In: CONGRESSO BRASILEIRO DE RECURSOS GENÉTICOS; WORKSHOP EM BIOPROSPECÇÃO E CONSERVAÇÃO DE PLANTAS NATIVAS DO SEMI-ÁRIDO, 3.; WORKSHOP INTERNACIONAL SOBRE BIOENERGIA E MEIO AMBIENTE, 2010, Salvador. Bancos de germoplasma: descobrir a riqueza, garantir o futuro: anais. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2010. 1 CD-ROM. (Embrapa Recursos Genéticos e Biotecnologia. Documentos, 304).
Tipo: Resumo em anais de congresso (ALICE)
Português
Relevância na Pesquisa
27.22%
Este trabalho teve como objetivo localizar regiões de LTR no genoma de M. fijiensis e padronizar a técnica de IRAP para este fitopatógeno.; 2010

O uso do soro autólogo condicionado -IRAP- no tratamento de lesões articulares em equinos : estudo preliminar

Oliveira, Rafaela Andreia Crespo de
Fonte: Universidade de Lisboa. Faculdade de Medicina Veterinária Publicador: Universidade de Lisboa. Faculdade de Medicina Veterinária
Tipo: Dissertação de Mestrado
Publicado em 28/09/2015 Português
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27.22%
Dissertação de Mestrado Integrado em Medicina Veterinária; Vários estudos têm mostrado o impacto das lesões articulares ao nível do desempenho desportivo dos equinos, bem como as suas repercussões a nível económico, associadas aos custos relacionados com tratamentos, mas também com o abandono precoce das competições. De entre as afecções articulares, a osteoartrite é a doença articular mais frequente em equinos de desporto. O objectivo principal desta dissertação é dar a conhecer a terapia regenerativa do soro autólogo condicionado, relatando três casos clínicos submetidos a este tratamento. O exame radiográfico, apesar de ser o método complementar imagiológico mais utilizado para a detecção de lesões a nível articular, mostrou ser uma ferramenta limitada, não revelando alterações significativas. Por outro lado, a realização das ressonâncias magnéticas em dois dos casos clínicos mostrou-se importante, possibilitando a observação de lesões não observadas nas radiografias. Os tratamentos realizados com o soro autólogo condicionado foram executados com sucesso, tendo sido obtidas melhorias significativas, que até então não tinham sido atingidas com os tratamentos anteriores. Apesar da reduzida casuísta...

Effectiveness of AFLPs and retrotransposon-based markers for the identification of portuguese grapevine cultivars and clones

Castro, Isaura; D'Onofrio, Claudio; Martín, Juan Pedro; Ortiz, Jesús María; De Lorenziz, Gabriella; Ferreira, Vanessa; Pinto-Carnide, Olinda
Fonte: Humana Press Inc. Publicador: Humana Press Inc.
Tipo: Artigo de Revista Científica
Português
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Grapevine germplasm, including 38 of the main Portuguese cultivars and three foreign cultivars, Pinot Noir, Pinot Blanc and Chasselas, used as a reference, and 37 true-to-type clones from the Alvarinho, Arinto, Loureiro, Moscatel Galego Branco, Trajadura and Vinhão cultivars were studied using AFLP and three retrotransposon-based molecular techniques, IRAP, REMAP and SSAP. To study the retrotransposon-based polymorphisms, 18 primers based on the LTR sequences of Tvv1, Gret1 and Vine-1 were used. In the analysis of 41 cultivars, 517 IRAP, REMAP, AFLP and SSAP fragments were obtained, 83% of which were polymorphic. For IRAP, only the Tvv1Fa primer amplified DNA fragments. In the REMAP analysis, the Tvv1Fa-Ms14 primer combination only produced polymorphic bands, and the Vine-1 primers produced mainly ISSR fragments. The highest number of polymorphic fragments was found for AFLP. Both AFLP and SSAP showed a greater capacity for identifying clones, resulting in 15 and 9 clones identified, respectively. Together, all of the techniques allowed for the identification of 54% of the studied clones, which is an important step in solving one of the challenges that viticulture currently faces.