Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 16 de 16
Filtrar
Mais filtros

Base de dados
Tipo de documento
Intervalo de ano de publicação
1.
Plant J ; 109(1): 196-214, 2022 01.
Artigo em Inglês | MEDLINE | ID: mdl-34741366

RESUMO

The importance of the alternative donation of electrons to the ubiquinol pool via the electron-transfer flavoprotein/electron-transfer flavoprotein:ubiquinone oxidoreductase (ETF/ETFQO) complex has been demonstrated. However, the functional significance of this pathway during seed development and germination remains to be elucidated. To assess the function of this pathway, we performed a detailed metabolic and transcriptomic analysis of Arabidopsis mutants to test the molecular consequences of a dysfunctional ETF/ETFQO pathway. We demonstrate that the disruption of this pathway compromises seed germination in the absence of an external carbon source and also impacts seed size and yield. Total protein and storage protein content is reduced in dry seeds, whilst sucrose levels remain invariant. Seeds of ETFQO and related mutants were also characterized by an altered fatty acid composition. During seed development, lower levels of fatty acids and proteins accumulated in the etfqo-1 mutant as well as in mutants in the alternative electron donors isovaleryl-CoA dehydrogenase (ivdh-1) and d-2-hydroxyglutarate dehydrogenase (d2hgdh1-2). Furthermore, the content of several amino acids was increased in etfqo-1 mutants during seed development, indicating that these mutants are not using such amino acids as alternative energy source for respiration. Transcriptome analysis revealed alterations in the expression levels of several genes involved in energy and hormonal metabolism. Our findings demonstrated that the alternative pathway of respiration mediated by the ETF/ETFQO complex affects seed germination and development by directly adjusting carbon storage during seed filling. These results indicate a role for the pathway in the normal plant life cycle to complement its previously defined roles in the response to abiotic stress.


Assuntos
Aminoácidos/metabolismo , Arabidopsis/genética , Carbono/metabolismo , Flavoproteínas Transferidoras de Elétrons/metabolismo , Proteínas Ferro-Enxofre/metabolismo , Oxirredutases atuantes sobre Doadores de Grupo CH-NH/metabolismo , Arabidopsis/enzimologia , Arabidopsis/crescimento & desenvolvimento , Proteínas de Arabidopsis/genética , Proteínas de Arabidopsis/metabolismo , Flavoproteínas Transferidoras de Elétrons/genética , Germinação , Proteínas Ferro-Enxofre/genética , Mutação , Oxirredutases atuantes sobre Doadores de Grupo CH-NH/genética , Sementes/enzimologia , Sementes/genética , Sementes/crescimento & desenvolvimento , Ubiquinona/análogos & derivados , Ubiquinona/metabolismo
2.
Rheumatol Int ; 39(4): 605-618, 2019 04.
Artigo em Inglês | MEDLINE | ID: mdl-30684041

RESUMO

Psoriatic arthritis (PsA) is associated with progressive joint destruction and reduced quality of life. The time until a drug treatment starts to show an effect (TOA) is important for preventing joint destruction. The objective was to assess the time until onset of action of drugs when treating PsA. A systematic review of PsA drug trials was performed. Outcomes were: time until 25% of patients (TOA) reached (1) ≥ 20%, (2) ≥ 50% improvement in modified American College of Rheumatology response criteria (ACR), (3) ≥ 75% reduction in Psoriasis Area and Severity Index (PASI75). 95% confidence intervals were calculated extracting data from graphs using a novel method. Meta-analysis was conducted. Two head-to-head trials show no difference between ixekizumab and adalimumab or adalimumab and tofacitinib for TOA-ACR outcomes. For PASI75, ixekizumab had a faster onset than adalimumab. Infliximab plus MTX was faster than MTX alone. Pooled results from 32 study arms for TOA-ACR20 (week [95% CI]) are: < 2 weeks: infliximab (1.18 [0.72-1.65]), ixekizumab (1.04 [0.80-1.28]), tofacitinib (10 mg 1.56 [1.14-1.98]); ≤ 4 weeks: adalimumab (1.95 [1.35-2.55]), secukinumab (75 mg 1.89 [0.16-3.62], 150 mg 2.13 [1.34-2.91], 300 mg 2.26 [1.75-2.76]), tofacitinib (5 mg 2.20 [1.41-2.99]); 4 + weeks: apremilast, ustekinumab. For TOA-ACR50, all pooled point estimates are > 4 weeks. For TOA-PASI75, the range is between 2.24 [1.65-2.84] for ixekizumab and 6.03 [3.76-8.29] for adalimumab. Indirect, mixed comparison suggest a faster onset of infliximab, ixekizumab and tofacitinib compared to apremilast, methotrexate and ustekinumab for ACR20, not ACR50. For PASI75, ixekizumab is faster than adalimumab.


Assuntos
Antirreumáticos/uso terapêutico , Artrite Psoriásica/tratamento farmacológico , Adalimumab/uso terapêutico , Anticorpos Monoclonais Humanizados/uso terapêutico , Intervalos de Confiança , Humanos , Infliximab/uso terapêutico , Metotrexato/uso terapêutico , Piperidinas/uso terapêutico , Pirimidinas/uso terapêutico , Pirróis/uso terapêutico , Talidomida/análogos & derivados , Talidomida/uso terapêutico , Fatores de Tempo , Resultado do Tratamento , Inibidores do Fator de Necrose Tumoral/uso terapêutico , Ustekinumab/uso terapêutico
3.
Plant Cell Environ ; 39(6): 1304-19, 2016 06.
Artigo em Inglês | MEDLINE | ID: mdl-26616144

RESUMO

During dark-induced senescence isovaleryl-CoA dehydrogenase (IVDH) and D-2-hydroxyglutarate dehydrogenase (D-2HGDH) act as alternate electron donors to the ubiquinol pool via the electron-transfer flavoprotein/electron-transfer flavoprotein:ubiquinone oxidoreductase (ETF/ETFQO) pathway. However, the role of this pathway in response to other stresses still remains unclear. Here, we demonstrated that this alternative pathway is associated with tolerance to drought in Arabidopsis. In comparison with wild type (WT) and lines overexpressing D-2GHDH, loss-of-function etfqo-1, d2hgdh-2 and ivdh-1 mutants displayed compromised respiration rates and were more sensitive to drought. Our results demonstrated that an operational ETF/ETFQO pathway is associated with plants' ability to withstand drought and to recover growth once water becomes replete. Drought-induced metabolic reprogramming resulted in an increase in tricarboxylic acid (TCA) cycle intermediates and total amino acid levels, as well as decreases in protein, starch and nitrate contents. The enhanced levels of the branched-chain amino acids in loss-of-function mutants appear to be related to their increased utilization as substrates for the TCA cycle under water stress. Our results thus show that mitochondrial metabolism is highly active during drought stress responses and provide support for a role of alternative respiratory pathways within this response.


Assuntos
Aminoácidos de Cadeia Ramificada/fisiologia , Arabidopsis/fisiologia , Aminoácidos de Cadeia Ramificada/metabolismo , Arabidopsis/metabolismo , Respiração Celular/fisiologia , Ciclo do Ácido Cítrico/fisiologia , Desidratação/metabolismo , Desidratação/fisiopatologia , Fotossíntese/fisiologia , Reação em Cadeia da Polimerase em Tempo Real , Ácidos Tricarboxílicos/metabolismo
4.
Plant Mol Biol ; 89(4-5): 319-38, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26428915

RESUMO

The enzyme poly(ADP-ribose)polymerase (PARP) has a dual function being involved both in the poly(ADP-ribosyl)ation and being a constituent of the NAD(+) salvage pathway. To date most studies, both in plant and non-plant systems, have focused on the signaling role of PARP in poly(ADP-ribosyl)ation rather than any role that can be ascribed to its metabolic function. In order to address this question we here used a combination of expression, transcript and protein localization studies of all three PARP isoforms of Arabidopsis alongside physiological analysis of the corresponding mutants. Our analyses indicated that whilst all isoforms of PARP were localized to the nucleus they are also present in non-nuclear locations with parp1 and parp3 also localised in the cytosol, and parp2 also present in the mitochondria. We next isolated and characterized insertional knockout mutants of all three isoforms confirming a complete knockout in the full length transcript levels of the target genes as well as a reduced total leaf NAD hydrolase activity in the two isoforms (PARP1, PARP2) that are highly expressed in leaves. Physiological evaluation of the mutant lines revealed that they displayed distinctive metabolic and root growth characteristics albeit unaltered leaf morphology under optimal growth conditions. We therefore conclude that the PARP isoforms play non-redundant non-nuclear metabolic roles and that their function is highly important in rapidly growing tissues such as the shoot apical meristem, roots and seeds.


Assuntos
Proteínas de Arabidopsis/genética , Proteínas de Arabidopsis/metabolismo , Arabidopsis/enzimologia , Arabidopsis/genética , Poli(ADP-Ribose) Polimerases/genética , Poli(ADP-Ribose) Polimerases/metabolismo , Arabidopsis/crescimento & desenvolvimento , DNA Bacteriano/genética , Perfilação da Expressão Gênica , Técnicas de Inativação de Genes , Genes de Plantas , Teste de Complementação Genética , Germinação , Isoenzimas/genética , Isoenzimas/metabolismo , Metaboloma , Mutação , NAD/metabolismo , Folhas de Planta/metabolismo , Raízes de Plantas/crescimento & desenvolvimento , Raízes de Plantas/metabolismo , Plantas Geneticamente Modificadas , Frações Subcelulares/enzimologia
5.
Plant Physiol ; 164(3): 1401-14, 2014 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-24424322

RESUMO

The posttranslational regulation of proteins by lysine (Lys) acetylation has recently emerged to occur not only on histones, but also on organellar proteins in plants and animals. In particular, the catalytic activities of metabolic enzymes have been shown to be regulated by Lys acetylation. The Arabidopsis (Arabidopsis thaliana) genome encodes two predicted sirtuin-type Lys deacetylases, of which only Silent Information Regulator2 homolog (SRT2) contains a predicted presequence for mitochondrial targeting. Here, we have investigated the function of SRT2 in Arabidopsis. We demonstrate that SRT2 functions as a Lys deacetylase in vitro and in vivo. We show that SRT2 resides predominantly at the inner mitochondrial membrane and interacts with a small number of protein complexes mainly involved in energy metabolism and metabolite transport. Several of these protein complexes, such as the ATP synthase and the ATP/ADP carriers, show an increase in Lys acetylation in srt2 loss-of-function mutants. The srt2 plants display no growth phenotype but rather a metabolic phenotype with altered levels in sugars, amino acids, and ADP contents. Furthermore, coupling of respiration to ATP synthesis is decreased in these lines, while the ADP uptake into mitochondria is significantly increased. Our results indicate that SRT2 is important in fine-tuning mitochondrial energy metabolism.


Assuntos
Proteínas de Arabidopsis/metabolismo , Arabidopsis/enzimologia , Metabolismo Energético , Histona Desacetilases/metabolismo , Lisina/metabolismo , Mitocôndrias/metabolismo , Sirtuínas/metabolismo , Acetilação , Difosfato de Adenosina/metabolismo , Trifosfato de Adenosina/metabolismo , Sequência de Aminoácidos , Isótopos de Carbono , Respiração Celular , Técnicas de Inativação de Genes , Membranas Mitocondriais/metabolismo , Proteínas Mitocondriais/química , Proteínas Mitocondriais/metabolismo , Dados de Sequência Molecular , NAD/metabolismo , Degradação do RNAm Mediada por Códon sem Sentido/genética , Fenótipo , Ligação Proteica , Transporte Proteico/genética , Splicing de RNA/genética , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Especificidade por Substrato
6.
Clin Exp Nephrol ; 19(3): 489-95, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-25150510

RESUMO

BACKGROUND: Osmotic demyelination syndrome (ODS) is a complication generally associated with overly rapid correction of hyponatremia. Traditionally, nephrologists have been trained to focus solely on limiting the correction rate. However, there is accumulating evidence to suggest that the prevention of ODS is beyond achieving slow correction rates. METHODS: We (1) reviewed the literature for glial intracellular protective alterations during hyperosmolar stress, a state presumed equivalent to the rapid correction of hyponatremia, and (2) analyzed all available hyponatremia-associated ODS cases from PubMed for possible contributing factors including correction rates and concurrent metabolic disturbances involving hypokalemia, hypophosphatemia, hypomagnesemia, and/or hypoglycemia. RESULTS: In response to acute hyperosmolar stress, glial cells undergo immediate extracellular free water shift, followed by active intracellular Na(+), K(+) and amino acid uptake, and eventual idiogenic osmoles synthesis. At minimum, protective mechanisms require K(+), Mg(2+), phosphate, amino acids, and glucose. There were 158 cases of hyponatremia-associated ODS where both correction rates and other metabolic factors were documented. Compared with the rapid correction group (>0.5 mmol/L/h), the slow correction group (≤0.5 mmol/L/h) had a greater number of cases with concurrent hypokalemia (49.4 vs. 33.3 %, p = 0.04), and a greater number of cases with any concurrent metabolic derangements (55.8 vs. 38.3 %, p = 0.03). CONCLUSION: Glial cell minimizes volume changes and injury in response to hyperosmolar stress via mobilization and/or utilization of various electrolytes and metabolic factors. The prevention of ODS likely requires both minimization of correction rate and optimization of intracellular response during the correction phase when a sufficient supply of various factors is necessary.


Assuntos
Doenças Desmielinizantes/metabolismo , Hiponatremia/metabolismo , Neuroglia/metabolismo , Sódio/metabolismo , Aminoácidos/metabolismo , Glucose/metabolismo , Humanos , Hipopotassemia/complicações , Hipopotassemia/metabolismo , Hiponatremia/complicações , Magnésio/metabolismo , Concentração Osmolar , Fosfatos/metabolismo , Potássio/metabolismo , Síndrome , Equilíbrio Hidroeletrolítico
7.
Plant Physiol ; 162(1): 239-53, 2013 May.
Artigo em Inglês | MEDLINE | ID: mdl-23487434

RESUMO

The transcriptional response to metabolites is an important mechanism by which plants integrate information about cellular energy and nutrient status. Although some carboxylic acids have been implicated in the regulation of gene expression for select transcripts, it is unclear whether all carboxylic acids have the same effect, how many transcripts are affected, and how carboxylic acid signaling is integrated with other metabolite signals. In this study, we demonstrate that perturbations in cellular concentrations of citrate, and to a lesser extent malate, have a major impact on nucleus-encoded transcript abundance. Functional categories of transcripts that were targeted by both organic acids included photosynthesis, cell wall, biotic stress, and protein synthesis. Specific functional categories that were only regulated by citrate included tricarboxylic acid cycle, nitrogen metabolism, sulfur metabolism, and DNA synthesis. Further quantitative real-time polymerase chain reaction analysis of specific citrate-responsive transcripts demonstrated that the transcript response to citrate is time and concentration dependent and distinct from other organic acids and sugars. Feeding of isocitrate as well as the nonmetabolizable citrate analog tricarballylate revealed that the abundance of selected marker transcripts is responsive to citrate and not downstream metabolites. Interestingly, the transcriptome response to citrate feeding was most similar to those observed after biotic stress treatments and the gibberellin biosynthesis inhibitor paclobutrazol. Feeding of citrate to mutants with defects in plant hormone signaling pathways did not completely abolish the transcript response but hinted at a link with jasmonic acid and gibberellin signaling pathways. Our results suggest that changes in carboxylic acid abundances can be perceived and signaled in Arabidopsis (Arabidopsis thaliana) by as yet unknown signaling pathways.


Assuntos
Arabidopsis/genética , Ácidos Carboxílicos/metabolismo , Regulação da Expressão Gênica de Plantas , Reguladores de Crescimento de Plantas/metabolismo , Transdução de Sinais , Transcriptoma , Arabidopsis/fisiologia , Proteínas de Arabidopsis/genética , Parede Celular/metabolismo , Ácido Cítrico/metabolismo , Ácido Cítrico/farmacologia , Ciclopentanos/metabolismo , Perfilação da Expressão Gênica , Giberelinas/metabolismo , Malatos/metabolismo , Malatos/farmacologia , Análise de Sequência com Séries de Oligonucleotídeos , Oxilipinas/metabolismo , Fotossíntese , Folhas de Planta/genética , Folhas de Planta/metabolismo , RNA Mensageiro/genética , RNA de Plantas/genética , Estresse Fisiológico , Fatores de Tempo
8.
Plant Physiol ; 157(3): 1026-42, 2011 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-21921115

RESUMO

In seeds, glutamate decarboxylase (GAD) operates at the metabolic nexus between carbon and nitrogen metabolism by catalyzing the unidirectional decarboxylation of glutamate to form γ-aminobutyric acid (GABA). To elucidate the regulatory role of GAD in seed development, we generated Arabidopsis (Arabidopsis thaliana) transgenic plants expressing a truncated GAD from Petunia hybrida missing the carboxyl-terminal regulatory Ca(2+)-calmodulin-binding domain under the transcriptional regulation of the seed maturation-specific phaseolin promoter. Dry seeds of the transgenic plants accumulated considerable amounts of GABA, and during desiccation the content of several amino acids increased, although not glutamate or proline. Dry transgenic seeds had higher protein content than wild-type seeds but lower amounts of the intermediates of glycolysis, glycerol and malate. The total fatty acid content of the transgenic seeds was 50% lower than in the wild type, while acyl-coenzyme A accumulated in the transgenic seeds. Labeling experiments revealed altered levels of respiration in the transgenic seeds, and fractionation studies indicated reduced incorporation of label in the sugar and lipid fractions extracted from transgenic seeds. Comparative transcript profiling of the dry seeds supported the metabolic data. Cellular processes up-regulated at the transcript level included the tricarboxylic acid cycle, fatty acid elongation, the shikimate pathway, tryptophan metabolism, nitrogen-carbon remobilization, and programmed cell death. Genes involved in the regulation of germination were similarly up-regulated. Taken together, these results indicate that the GAD-mediated conversion of glutamate to GABA during seed development plays an important role in balancing carbon and nitrogen metabolism and in storage reserve accumulation.


Assuntos
Arabidopsis/crescimento & desenvolvimento , Arabidopsis/metabolismo , Carbono/metabolismo , Ácido Glutâmico/metabolismo , Nitrogênio/metabolismo , Sementes/crescimento & desenvolvimento , Ácido gama-Aminobutírico/metabolismo , Arabidopsis/enzimologia , Arabidopsis/genética , Calmodulina/metabolismo , Isótopos de Carbono , Ciclo do Ácido Cítrico , Dessecação , Transporte de Elétrons , Ácidos Graxos/metabolismo , Regulação da Expressão Gênica de Plantas , Genes de Plantas/genética , Germinação , Glutamato Descarboxilase/metabolismo , Marcação por Isótopo , Mitocôndrias/metabolismo , Proteínas Mutantes/metabolismo , Petunia/enzimologia , Plantas Geneticamente Modificadas , Ligação Proteica , Estrutura Terciária de Proteína , Sementes/metabolismo , Regulação para Cima
9.
Semin Dial ; 23(6): 595-605, 2010.
Artigo em Inglês | MEDLINE | ID: mdl-21175834

RESUMO

Important advances in immunosuppressive therapy and refinement in surgical techniques have allowed renal transplantation to become the treatment of choice for virtually all suitable candidates with end-stage renal disease. Compared to dialysis, kidney transplantation improves both patient survival and quality of life and, over time, can reduce the total cost of medical care. It must be noted, however, that although the risk of death in the first year after transplantation is <5%, not all patients qualify for the surgery because of their unacceptable risks for complications. The transplant evaluation process requires a comprehensive assessment of each patient's medical, surgical, and psychosocial histories. Selection of the suitable transplant candidate remains a challenge for transplant physicians owing, predominantly, to the presence of complex medical issues in the potential candidates and nonstandardized criteria for acceptance or rejection among transplant centers. Furthermore, with the ever-increasing disparity between donor organ supply and demand and resultant increased wait-list times, the transplant physicians must further consider the optimal management and re-evaluation of wait-list patients during the waiting period. This article describes a systematic approach for the evaluation of a potential renal transplant candidate. Various medical issues that arise during the evaluation process are discussed.


Assuntos
Falência Renal Crônica/cirurgia , Transplante de Rim , Seleção de Pacientes , Doadores de Tecidos/provisão & distribuição , Listas de Espera , Adulto , Humanos
10.
Clin Kidney J ; 10(5): 688-697, 2017 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-28979781

RESUMO

The prevalence of pain has been reported to be >60-70% among patients with advanced and end-stage kidney disease. Although the underlying etiologies of pain may vary, pain per se has been linked to lower quality of life and depression. The latter is of great concern given its known association with reduced survival among patients with end-stage kidney disease. We herein discuss and update the management of pain in patients with chronic kidney disease with and without requirement for renal replacement therapy with the focus on optimizing pain control while minimizing therapy-induced complications.

11.
Int J Nephrol Renovasc Dis ; 7: 219-30, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-24966690

RESUMO

Although magnesium is involved in a wide spectrum of vital functions in normal human physiology, the significance of hypomagnesemia and necessity for its treatment are under-recognized and underappreciated in clinical practice. In the current review, we first present an overview of the clinical significance of hypomagnesemia and normal magnesium metabolism, with a focus on renal magnesium handling. Subsequently, we review the literature for both congenital and acquired hypomagnesemic conditions that affect the various steps in normal magnesium metabolism. Finally, we present an approach to the routine evaluation and suggested management of hypomagnesemia.

12.
Vasc Health Risk Manag ; 7: 551-67, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-21915172

RESUMO

The advent of potent antiplatelet and antithrombotic agents over the past decade has resulted in significant improvement in reducing ischemic events in acute coronary syndrome (ACS). However, the use of antiplatelet and antithrombotic combination therapy, often in the settings of percutaneous coronary intervention (PCI), has led to an increase in the risk of bleeding. In patients with non-ST elevation myocardial infarction treated with antithrombotic agents, bleeding has been reported to occur in 0.4%-10% of patients, whereas in patients undergoing PCI, periprocedural bleeding occurs in 2.2%-14% of cases. Until recently, bleeding was considered an intrinsic risk of antithrombotic therapy, and efforts to reduce bleeding have received little attention. There have been increasing data demonstrating that bleeding is associated with adverse outcomes, including myocardial infarction, stroke, and death. Therefore, it is imperative to optimize patient outcomes by adopting pharmacological and nonpharmacological strategies to minimize bleeding while maximizing treatment efficacy. In this paper, we present a review of the bleeding classifications used in large-scale clinical trials in patients with ACS and those undergoing PCI treated with antiplatelets and antithrombotic agents, adverse outcomes, particularly mortality associated with bleeding complications, and suggested predictive risk factors. Potential mechanisms of the association between bleeding and mortality and strategies to reduce bleeding complications are also discussed.


Assuntos
Síndrome Coronariana Aguda/terapia , Angioplastia Coronária com Balão/efeitos adversos , Fibrinolíticos/efeitos adversos , Hemorragia/etiologia , Inibidores da Agregação Plaquetária/efeitos adversos , Trombose/prevenção & controle , Síndrome Coronariana Aguda/sangue , Síndrome Coronariana Aguda/mortalidade , Angioplastia Coronária com Balão/mortalidade , Hemorragia/mortalidade , Humanos , Seleção de Pacientes , Medição de Risco , Fatores de Risco , Trombose/sangue , Trombose/etiologia , Trombose/mortalidade , Resultado do Tratamento
13.
Diabetes Metab Syndr Obes ; 4: 175-86, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-21760734

RESUMO

Although renal transplantation ameliorates cardiovascular risk factors by restoring renal function, it introduces new cardiovascular risks including impaired glucose tolerance or diabetes mellitus, hypertension, and dyslipidemia that are derived, in part, from immunosuppressive medications such as calcineurin inhibitors, corticosteroids, or mammalian target of rapamycin inhibitors. New onset diabetes mellitus after transplantation (NODAT) is a serious and common complication following solid organ transplantation. NODAT has been reported to occur in 2% to 53% of all solid organ transplants. Kidney transplant recipients who develop NODAT have variably been reported to be at increased risk of fatal and nonfatal cardiovascular events and other adverse outcomes including infection, reduced patient survival, graft rejection, and accelerated graft loss compared with those who do not develop diabetes. Identification of high-risk patients and implementation of measures to reduce the development of NODAT may improve long-term patient and graft outcome. The following article presents an overview of the literature on the current diagnostic criteria for NODAT, its incidence after solid organ transplantation, suggested risk factors and potential pathogenic mechanisms. The impact of NODAT on patient and allograft outcomes and suggested guidelines for early identification and management of NODAT will also be discussed.

14.
Drug Des Devel Ther ; 4: 203-20, 2010 Sep 07.
Artigo em Inglês | MEDLINE | ID: mdl-20856846

RESUMO

In patients undergoing percutaneous coronary intervention (PCI) for acute coronary syndrome (ACS), both periprocedural acute myocardial infarction and bleeding complications have been shown to be associated with early and late mortality. Current standard antithrombotic therapy after coronary stent implantation consists of lifelong aspirin and clopidogrel for a variable period depending in part on the stent type. Despite its well-established efficacy in reducing cardiac-related death, myocardial infarction, and stroke, dual antiplatelet therapy with aspirin and clopidogrel is not without shortcomings. While clopidogrel may be of little beneficial effect if administered immediately prior to PCI and may even increase major bleeding risk if coronary artery bypass grafting is anticipated, early discontinuation of the drug may result in insufficient antiplatelet coverage with thrombotic complications. Optimal and rapid inhibition of platelet activity to suppress ischemic and thrombotic events while minimizing bleeding complications is an important therapeutic goal in the management of patients undergoing percutaneous coronary intervention. In this article we present an overview of the literature on clinical trials evaluating the different aspects of antithrombotic therapy in patients undergoing PCI and discuss the emerging role of these agents in the contemporary era of early invasive coronary intervention. Clinical trial acronyms and their full names are provided in Table 1.


Assuntos
Síndrome Coronariana Aguda/terapia , Angioplastia Coronária com Balão/métodos , Fibrinolíticos/uso terapêutico , Aspirina/uso terapêutico , Ensaios Clínicos como Assunto , Clopidogrel , Humanos , Inibidores da Agregação Plaquetária/uso terapêutico , Stents , Ticlopidina/análogos & derivados , Ticlopidina/uso terapêutico
15.
NDT Plus ; 2(2): 111-8, 2009 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-25949305

RESUMO

Pain has been reported to be a common problem in the general population and end-stage renal disease (ESRD) patients. Although similar data for pre-ESRD patients are lacking, we recently reported that the prevalence of pain is also very high (>70%) among pre-ESRD patients at a Los Angeles County tertiary referral centre. The high prevalence of pain in the CKD population is particularly concerning because pain has been shown to be associated with poor quality of life. Of greater concern, poor quality of life, at least in dialysis patients, has been shown to be associated with poor survival. We herein discuss the pathophysiology of common pain conditions, review a commonly accepted approach to the management of pain in the general population, and discuss analgesic-induced renal complications and therapeutic issues specific for patients with reduced renal function.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA