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1.
JAMA Psychiatry ; 81(4): 357-365, 2024 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-38231522

RESUMO

Importance: Chronic insomnia disorder is highly prevalent, disabling, and costly. Cognitive behavioral therapy for insomnia (CBT-I), comprising various educational, cognitive, and behavioral strategies delivered in various formats, is the recommended first-line treatment, but the effect of each component and delivery method remains unclear. Objective: To examine the association of each component and delivery format of CBT-I with outcomes. Data Sources: PubMed, Cochrane Central Register of Controlled Trials, PsycInfo, and International Clinical Trials Registry Platform from database inception to July 21, 2023. Study Selection: Published randomized clinical trials comparing any form of CBT-I against another or a control condition for chronic insomnia disorder in adults aged 18 years and older. Insomnia both with and without comorbidities was included. Concomitant treatments were allowed if equally distributed among arms. Data Extraction and Synthesis: Two independent reviewers identified components, extracted data, and assessed trial quality. Random-effects component network meta-analyses were performed. Main Outcomes and Measures: The primary outcome was treatment efficacy (remission defined as reaching a satisfactory state) posttreatment. Secondary outcomes included all-cause dropout, self-reported sleep continuity, and long-term remission. Results: A total of 241 trials were identified including 31 452 participants (mean [SD] age, 45.4 [16.6] years; 21 048 of 31 452 [67%] women). Results suggested that critical components of CBT-I are cognitive restructuring (remission incremental odds ratio [iOR], 1.68; 95% CI, 1.28-2.20) third-wave components (iOR, 1.49; 95% CI, 1.10-2.03), sleep restriction (iOR, 1.49; 95% CI, 1.04-2.13), and stimulus control (iOR, 1.43; 95% CI, 1.00-2.05). Sleep hygiene education was not essential (iOR, 1.01; 95% CI, 0.77-1.32), and relaxation procedures were found to be potentially counterproductive(iOR, 0.81; 95% CI, 0.64-1.02). In-person therapist-led programs were most beneficial (iOR, 1.83; 95% CI, 1.19-2.81). Cognitive restructuring, third-wave components, and in-person delivery were mainly associated with improved subjective sleep quality. Sleep restriction was associated with improved subjective sleep quality, sleep efficiency, and wake after sleep onset, and stimulus control with improved subjective sleep quality, sleep efficiency, and sleep latency. The most efficacious combination-consisting of cognitive restructuring, third wave, sleep restriction, and stimulus control in the in-person format-compared with in-person psychoeducation, was associated with an increase in the remission rate by a risk difference of 0.33 (95% CI, 0.23-0.43) and a number needed to treat of 3.0 (95% CI, 2.3-4.3), given the median observed control event rate of 0.14. Conclusions and Relevance: The findings suggest that beneficial CBT-I packages may include cognitive restructuring, third-wave components, sleep restriction, stimulus control, and in-person delivery but not relaxation. However, potential undetected interactions could undermine the conclusions. Further large-scale, well-designed trials are warranted to confirm the contribution of different treatment components in CBT-I.


Assuntos
Terapia Cognitivo-Comportamental , Distúrbios do Início e da Manutenção do Sono , Adulto , Humanos , Feminino , Pessoa de Meia-Idade , Masculino , Distúrbios do Início e da Manutenção do Sono/terapia , Metanálise em Rede , Terapia Cognitivo-Comportamental/métodos , Sono , Resultado do Tratamento
2.
Behav Sleep Med ; : 1-11, 2023 Aug 06.
Artigo em Inglês | MEDLINE | ID: mdl-37545146

RESUMO

OBJECTIVES: To develop the Parenting Behavior Checklist to Promote Preschoolers' sleep (PCPP), quantify sleep-promoting parenting behaviors for children, and examine the scale's reliability and validity. METHODS: The PCPP was developed based on the recommendations of the ABCs of SLEEPING for children's sleep, which is strongly supported by research evidence. Its validity and reliability were evaluated using data from 140 participants. Structural validity was estimated using exploratory factor analysis (EFA) and confirmatory factor analysis (CFA), and internal consistency was evaluated by Cronbach's α. Hypothesis testing was evaluated by analyzing the correlations between each factor of the Japanese Sleep Questionnaire for Preschoolers (JSQ-P) and the PCPP. RESULTS: Regarding structural validity, EFA was conducted because CFA showed a poor model fit. The PCPP comprised one factor and six items. The JSQ-P subfactors of insomnia or circadian rhythm sleep-wake disorders, undesirable morning symptoms and behaviors, and insufficient sleep were moderately negatively correlated with the PCPP; the subfactor of undesirable daytime behaviors related to sleep problems was weakly negatively correlated with the PCPP. Thus, the sleep-promoting parenting behaviors listed in the PCPP were associated with better sleep in children. CONCLUSIONS: The PCPP showed sufficient reliability and validity. Future studies should use the scale to examine more effective interventions regarding sleep-promoting parental behaviors for children.

3.
Cancers (Basel) ; 14(15)2022 Aug 05.
Artigo em Inglês | MEDLINE | ID: mdl-35954478

RESUMO

Variations in dose prescription methods in stereotactic body radiotherapy (SBRT) for early stage non-small-cell lung cancer (ES-NSCLC) make it difficult to properly compare the outcomes of published studies. We conducted a comprehensive search of the published literature to summarize the outcomes by discerning the relationship between local control (LC) and dose prescription sites. We systematically searched PubMed to identify observational studies reporting LC after SBRT for peripheral ES-NSCLC. The correlations between LC and four types of biologically effective doses (BED) were evaluated, which were calculated from nominal, central, and peripheral prescription points and, from those, the average BED. To evaluate information on SBRT for peripheral ES-NSCLC, 188 studies were analyzed. The number of relevant articles increased over time. The use of an inhomogeneity correction was mentioned in less than half of the articles, even among the most recent. To evaluate the relationship between the four BEDs and LC, 33 studies were analyzed. Univariate meta-regression revealed that only the central BED significantly correlated with the 3-year LC of SBRT for ES-NSCLC (p = 0.03). As a limitation, tumor volume, which might affect the results of this study, could not be considered due to a lack of data. In conclusion, the central dose prescription is appropriate for evaluating the correlation between the dose and LC of SBRT for ES-NSCLC. The standardization of SBRT dose prescriptions is desirable.

4.
Sci Rep ; 10(1): 17378, 2020 10 15.
Artigo em Inglês | MEDLINE | ID: mdl-33060675

RESUMO

High temperature during grain filling considerably reduces yield and quality in rice (Oryza sativa L.); however, how high temperature affects seed germination of the next generation is not yet well understood. Here, we report that seeds from plants exposed to high temperature during the grain filling stage germinated significantly later than seeds from unstressed plants. This delay remained even after dormancy release treatments, suggesting that it was not due to primary seed dormancy determined during grain filling. In imbibed embryos of heat-stressed seeds, expression of abscisic acid (ABA) biosynthesis genes (OsNCEDs) was higher than in those of control seeds, whereas that of ABA catabolism genes (OsABA8'OHs) was lower. In the aleurone layer, despite no change in GA signaling as evidenced by no effect of heat stress on OsGAMYB gene expression, the transcripts of α-amylase genes OsAmy1C, OsAmy3B, and OsAmy3E were significantly down-regulated in heat-stressed seeds in comparison with controls. Changes in promoter methylation levels were consistent with transcriptional changes of ABA catabolism-related and α-amylase genes. These data suggest that high temperature during grain filling results in DNA methylation of ABA catabolism-related and α-amylase gene promoters, delaying germination of heat-stressed seeds.


Assuntos
Germinação , Temperatura Alta , Oryza/embriologia , Sementes/crescimento & desenvolvimento , Ácido Abscísico/metabolismo , Metilação de DNA , Regulação da Expressão Gênica de Plantas , Genes de Plantas , Giberelinas/metabolismo , Oryza/genética , Oryza/metabolismo , Regiões Promotoras Genéticas , Estresse Fisiológico
5.
Respirol Case Rep ; 8(7): e00656, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32884816

RESUMO

The case of a heavy ex-smoking man in his early 70s who presented with haemoptysis and died following rapid progression is presented. The tumour excised by surgery was mostly composed of monotonous large rhabdoid cells showing prominent nucleoli and eosinophilic cytoplasm. On immunohistochemistry with SMARCA4 (BRG-1), the tumour cells showed significant loss of expression. The tumour was diagnosed as a SMARCA4-deficient thoracic sarcoma. This is a disease that progresses rapidly and has a poor prognosis. However, the search for specific treatments using synthetic lethality is underway. Clinical and pathological characteristics can be identified with examination of more cases, and when the tumour is suspected, it is necessary to actively perform immunohistochemical examination.

6.
Plants (Basel) ; 9(7)2020 Jul 07.
Artigo em Inglês | MEDLINE | ID: mdl-32646051

RESUMO

Nitrogen (N) deficiency is one of the most common problems in soils, limiting crop growth and production. However, the effects of N limitation in seedlings on vegetative growth remain poorly understood. Here, we show that N limitation in rice seedlings restricted vegetative growth but not yield. Aboveground parts were affected mainly during the period of tillering, but belowground parts were sensitive throughout vegetative growth, especially during panicle development. At the tillering stage, N-limited plants had a significantly lower N content in shoots, but not in roots. On the other hand, N content in roots during the panicle development stage was significantly lower in N-limited plants. This distinct response was driven by significant changes in expression of N transporter genes during growth. Under N limitation, N translocation from roots to shoots was greatly sped up by systemic expression of N transporter genes to obtain balanced growth. N limitation during the seedling stage did not reduce any yield components. We conclude that the N condition during the seedling stage affects physiological responses such as N translocation through the expression of N transporter genes.

7.
Adv Exp Med Biol ; 1081: 233-257, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30288713

RESUMO

Environmental stresses can reduce crop yield and quality considerably. Plants protect cell metabolism in response to abiotic stresses at all stages of their life cycle, including seed production. As the production of vigorous seeds is important to both yield and crop growth, we analyzed causes of yield loss and reduced grain quality in staple crops exposed to environmental stresses such as drought and temperature extremes, with a focus on the remobilization of nutrients and water status during seed filling. Because water is one of the factors that limit seed development, seeds must have mechanisms that allow them to withstand water loss during seed maturation. In addition, analysis of the effects of reactive oxygen species (ROS) on transcription regulation and signaling should help to elucidate the regulation of seed dormancy and germination. In this review, we focus on nutrient remobilization, water mobility, plant hormones (gibberellins, abscisic acid, and ethylene), and ROS in sink and source organs and describe how rice, wheat, barley, soybean, and cowpea plants control seed maturation and germination under environmental stresses.


Assuntos
Produtos Agrícolas/metabolismo , Secas , Metabolismo Energético , Meio Ambiente , Germinação , Estresse Oxidativo , Espécies Reativas de Oxigênio/metabolismo , Sementes/metabolismo , Água/metabolismo , Produtos Agrícolas/genética , Produtos Agrícolas/crescimento & desenvolvimento , Desidratação , Regulação da Expressão Gênica de Plantas , Estado de Hidratação do Organismo , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Sementes/genética , Sementes/crescimento & desenvolvimento , Transdução de Sinais
8.
Sci Rep ; 8(1): 7784, 2018 05 17.
Artigo em Inglês | MEDLINE | ID: mdl-29773895

RESUMO

The CRISPR/Cas9 system provides a novel and promising tool for editing the HIV-1 proviral genome. We designed RNA-guided CRISPR/Cas9 targeting the HIV-1 regulatory genes tat and rev with guide RNAs (gRNA) selected from each gene based on CRISPR specificity and sequence conservation across six major HIV-1 subtypes. Each gRNA was cloned into lentiCRISPRv2 before co-transfection to create a lentiviral vector and transduction into target cells. CRISPR/Cas9 transduction into 293 T and HeLa cells stably expressing Tat and Rev proteins successfully abolished the expression of each protein relative to that in non-transduced and gRNA-absent vector-transduced cells. Tat functional assays showed significantly reduced HIV-1 promoter-driven luciferase expression after tat-CRISPR transduction, while Rev functional assays revealed abolished gp120 expression after rev-CRISPR transduction. The target gene was mutated at the Cas9 cleavage site with high frequency and various indel mutations. Conversely, no mutations were detected at off-target sites and Cas9 expression had no effect on cell viability. CRISPR/Cas9 was further tested in persistently and latently HIV-1-infected T-cell lines, in which p24 levels were significantly suppressed even after cytokine reactivation, and multiplexing all six gRNAs further increased efficiency. Thus, the CRISPR/Cas9 system targeting HIV-1 regulatory genes may serve as a favorable means to achieve functional cures.


Assuntos
Sistemas CRISPR-Cas , HIV-1/genética , Replicação Viral/genética , Linhagem Celular , Genes rev , Genes tat , Terapia Genética , Humanos , Linfócitos T/virologia
9.
J Med Ultrason (2001) ; 45(2): 331-335, 2018 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-29027063

RESUMO

We encountered a case of inflammatory myofibroblastic tumor (IMT) of the breast with simultaneous intracranial, lung, and pancreas involvement. Here, we present the clinical imaging results and report the significance of sonographic findings of breast IMT along with a review of the literature. A 16-year-old girl with a history of subarachnoidal hemorrhage was admitted to our hospital due to tonic-clonic seizure. Computed tomography (CT) and magnetic resonance imaging (MRI) showed multiple intracranial, lung, and pancreas mass lesions and a solitary mass lesion in the right breast. Breast ultrasonography showed a circumscribed oval-shaped hypoechoic mass with a central hyperechoic region. Power Doppler sonography revealed an unusual spiral-shaped flow signal. Breast tumorectomy was performed for definitive diagnosis, and pathological analysis indicated IMT. A literature review indicated that ultrasonographic findings of IMT of the breast are nonspecific, as in other systems or organs. It would be difficult to make a diagnosis of IMT of the breast preoperatively due to its rarity and the lack of specificity of clinical imaging findings. In addition, it is better to consider the possibility of IMT of the breast especially in younger patients without an obvious family history of hereditary breast cancer.


Assuntos
Neoplasias Encefálicas/diagnóstico por imagem , Neoplasias da Mama/diagnóstico por imagem , Neoplasias da Mama/patologia , Neoplasias Pulmonares/diagnóstico por imagem , Neoplasias Pancreáticas/diagnóstico por imagem , Adolescente , Neoplasias Encefálicas/secundário , Feminino , Humanos , Neoplasias Pulmonares/secundário , Imagem Multimodal , Neoplasias Pancreáticas/secundário , Ultrassonografia Mamária
10.
AIDS Res Hum Retroviruses ; 33(12): 1248-1257, 2017 12.
Artigo em Inglês | MEDLINE | ID: mdl-28903577

RESUMO

The envelope glycoprotein (Env) gp120 of human immunodeficiency virus type 1 (HIV-1) plays a critical role in viral entry into host cells. The broadly neutralizing human monoclonal antibody VRC01, which recognizes the CD4 binding site on gp120, neutralizes more than 90% of HIV-1 isolates. However, some of the CRF01_AE viruses prevalent in Southeast Asia are resistant to VRC01-mediated neutralization. We previously reported that 3 amino acid residues at positions 185, 186, and 197 of gp120 played an important role in the VRC01 resistance of CRF01_AE Env (AE-Env) clones isolated from HIV-infected Thai individuals. However, the VRC01 susceptibility of AE-Env clones was not fully explained by mutations at these 3 residues. In the present study, we examined other factors involved in the acquisition of viral VRC01 resistance. Neutralization tests using lentiviral vectors expressing a series of mutant AE-Env clones revealed that the deletion of 2-4 amino acid residues on the loop structure in the V5 region of gp120 conferred VRC01 resistance to several AE-Env clones. Our results provide novel insights into the mechanisms underlying viral VRC01 resistance.


Assuntos
Fármacos Anti-HIV/uso terapêutico , Anticorpos Monoclonais/uso terapêutico , Anticorpos Neutralizantes/uso terapêutico , Farmacorresistência Viral/genética , Anticorpos Anti-HIV/uso terapêutico , Proteína gp120 do Envelope de HIV/genética , Infecções por HIV/tratamento farmacológico , Sequência de Aminoácidos , Fármacos Anti-HIV/imunologia , Anticorpos Monoclonais/imunologia , Anticorpos Neutralizantes/imunologia , Sítios de Ligação/genética , Anticorpos Amplamente Neutralizantes , Linhagem Celular , Anticorpos Anti-HIV/imunologia , Infecções por HIV/virologia , HIV-1/genética , HIV-1/imunologia , Humanos , Testes de Neutralização , Deleção de Sequência/genética , Tailândia , Internalização do Vírus
11.
J Plant Physiol ; 216: 52-57, 2017 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-28575747

RESUMO

Heat stress during grain filling increases rice grain chalkiness due to increased activity of α-amylase, which hydrolyzes starch. In rice and barley seeds, reactive oxygen species (ROS) produced after imbibition induce α-amylase activity via regulation of gibberellin (GA) and abscisic acid (ABA) levels during seed germination. Here, we examined whether ROS is involved in induction of grain chalkiness by α-amylase in developing rice grains under heat stress. To elucidate the role of ROS in grain chalkiness, we grew post-anthesis rice plants (Oryza sativa L. cv. Koshihikari) under control (25°C) or heat stress (30°C) conditions with or without antioxidant (dithiothreitol) treatment. The developing grains were analyzed for expression of NADPH oxidases, GA biosynthesis genes (OsGA3ox1, OsGA20ox1), ABA catabolism genes (OsABA8'OH1, OsABA8'OH2) and an α-amylase gene (OsAmy3E), endogenous H2O2 content and the grain quality. In grains exposed to heat stress, the expression of NADPH oxidase genes (especially, OsRbohB, OsRbohD, OsRbohF and OsRbohI) and the ROS content increased. Heat stress also increased the expression of OsGA3ox1, OsGA20ox1, OsABA8'OH1, OsABA8'OH2 and OsAmy3E. On the other hand, dithiothreitol treatment reduced the effects of heat stress on the expression of these genes and significantly reduced grain chalkiness induced by heat stress. These results suggest that, similar to cereal seed germination mechanism, ROS produced under heat stress is involved in α-amylase induction in maturating rice grains through GA/ABA metabolism, and consequently caused grain chalkiness.


Assuntos
Resposta ao Choque Térmico , Oryza/fisiologia , Espécies Reativas de Oxigênio/metabolismo , Sementes/fisiologia , Ácido Abscísico/metabolismo , Antioxidantes/farmacologia , Ditiotreitol/farmacologia , Regulação da Expressão Gênica de Plantas/efeitos dos fármacos , Giberelinas/metabolismo , Resposta ao Choque Térmico/efeitos dos fármacos , Resposta ao Choque Térmico/genética , Peróxido de Hidrogênio/metabolismo , Oryza/efeitos dos fármacos , Oryza/genética , Sementes/efeitos dos fármacos , Sementes/genética , Amido/metabolismo
12.
Plant Signal Behav ; 12(6): e1327495, 2017 06 03.
Artigo em Inglês | MEDLINE | ID: mdl-28532320

RESUMO

Soybean pods are located at the nodes, where they are in the shadow, whereas cowpea pods are located outside of the leaves and are exposed to sunlight. To compare the effects of light quality on pod growth in soybean and cowpea, we measured the length of pods treated with white, blue, red or far-red light. In both species, pods elongated faster during the dark period than during the light period in all light treatments except red light treatment in cowpea. Red light significantly suppressed pod elongation in soybean during the dark and light periods. On the other hand, the elongation of cowpea pods treated with red light markedly promoted during the light period. These results suggested that the difference in the pod set sites between soybean and cowpea might account for the difference in their red light responses for pod growth.


Assuntos
Glycine max/crescimento & desenvolvimento , Glycine max/efeitos da radiação , Luz , Sementes/crescimento & desenvolvimento , Sementes/efeitos da radiação , Vigna/crescimento & desenvolvimento , Vigna/efeitos da radiação
13.
Front Plant Sci ; 8: 275, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28377774

RESUMO

Seed dormancy is one of the adaptive responses in the plant life cycle and an important agronomic trait. Reactive oxygen species (ROS) release seed dormancy and promote seed germination in several cereal crops; however, the key regulatory mechanism of ROS-mediated seed dormancy and germination remains controversial. Here, we focused on the relationship between hydrogen peroxide (a ROS) and abscisic acid (ABA) in dormant and non-dormant barley seeds. The hydrogen peroxide (H2O2) level produced in barley seed embryos after imbibition was higher in non-dormant seeds than in dormant seeds. H2O2 regulated the ABA content in the embryos through ABA-8'-hydroxylase, an ABA catabolic enzyme. Moreover, compared with non-dormant seeds, in dormant seeds the activity of NADPH oxidase, which produces ROS, was lower, whereas the activity of catalase, which is a H2O2 scavenging enzyme, was higher, as was the expression of HvCAT2. Furthermore, precocious germination of isolated immature embryos was suppressed by the transient introduction of HvCAT2 driven by the maize (Zea mays) ubiquitin promoter. HvCAT2 expression was regulated through an ABA-responsive transcription factor (HvABI5) induced by ABA. These results suggest that the changing of balance between ABA and ROS is active in barley seed embryos after imbibition and regulates barley seed dormancy and germination.

14.
J Diabetes Investig ; 8(4): 489-495, 2017 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-28084015

RESUMO

AIMS/INTRODUCTION: Mannose is a monosaccharide constituent of glycoproteins and glycolipids. Experiments in rats have shown previously that the plasma mannose level decreases after glucose load, but does not decrease in diabetic rats, and that hepatic glycogenolysis is a source of this plasma mannose; however, these results are not fully elucidated in humans. Plasma mannose levels before/after glucose loading in humans with various degrees of glucose intolerance were examined to analyze their association with clinical factors. MATERIALS AND METHODS: The 75-g oral glucose tolerance test was carried out in Japanese individuals not taking diabetes medications. Participants were classified into normal glucose tolerance, impaired glucose metabolism and diabetes mellitus groups. Insulinogenic index as an index of insulin secretion, and Matsuda Index as an index of insulin sensitivity were calculated. Mannose was assayed by the established method using high-performance liquid chromatography after labeling. RESULTS: After glucose load, the plasma mannose level decreased gradually in the normal glucose tolerance group, but did not decrease in the diabetes mellitus group. Plasma mannose changes during 120 min from baseline (M120 -M0 ) were significantly different among the three groups (normal glucose tolerance: -16.7 ± 1.7; impaired glucose metabolism: -9.0 ± 1.9; diabetes mellitus: -1.4 ± 1.8 µmol/L [n = 25 in each group], P < 0.0001). Plasma glucose 120 min after glucose loading (R2  = 0.412) or loge -insulinogenic index, loge -Matsuda Index and age (R2  = 0.230) were determinants of M120 -M0 in multiple regression analyses. CONCLUSIONS: We clarified the relationship between plasma mannose level and glucose tolerance in humans. The present results are compatible with those using rats, in which mannose derived from glycogenolysis plays an important role in the alteration of mannose levels after glucose loading.


Assuntos
Intolerância à Glucose , Glicogenólise , Manose/sangue , Idoso , Feminino , Teste de Tolerância a Glucose , Humanos , Masculino , Pessoa de Meia-Idade , Análise de Regressão
15.
FEBS Open Bio ; 7(1): 88-95, 2017 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-28097091

RESUMO

HIV disease became a manageable chronic disease since combination antiretroviral therapy (cART) was introduced as the standard treatment regimen. However, the emergence of drug-resistant viruses is a major problem associated with cART. A phenotypic drug susceptibility test using a lentiviral vector was established and applied to evaluate new protease inhibitors (PIs). Lentiviral vectors representing a wild-type (WT-lentivector) and darunavir (DRV)-resistant HIV type 1 (HIV-1) (DRV r-lentivector) were generated. Nine clinically approved protease inhibitors (PIs) inhibited the transduction ability of WT-lentivector similar to their inhibitory effects on the replication of WT HIV-1. Three new PIs reduced the transduction ability of WT- and DRV r-lentivector, suggesting that these PIs may be the candidates as novel antiretroviral drugs against drug-resistant variants of HIV-1.

16.
Plant Signal Behav ; 11(5): e1180492, 2016 05 03.
Artigo em Inglês | MEDLINE | ID: mdl-27110861

RESUMO

NADPH oxidase catalyzes the production of the superoxide anion (O2(-)), a reactive oxygen species (ROS), and regulates the germination of barley (Hordeum vulgare L.). Diphenyleneiodonium (DPI) chloride, an NADPH oxidase inhibitor, delayed barley germination, and exogenous H2O2 (an ROS) partially rescued it. Six enzymes, ent-copalyl diphosphate synthase (CPS), ent-kaurene synthase (KS), ent-kaurene oxidase (KO), ent-kaurenoic acid oxidase (KAO), GA20-oxidase (GA20ox) and GA3-oxidase (GA3ox), catalyze the transformation of trans-geranylgeranyl diphosphate to active gibberellin, which promotes germination. Exogenous H2O2 promoted the expressions of HvKAO1 and HvGA3ox1 in barley embryos. These results suggest that ROS produced by NADPH oxidase are involved in gibberellin biosynthesis through the regulation of HvKAO1 and HvGA3ox1.


Assuntos
Germinação , Giberelinas/biossíntese , Hordeum/enzimologia , Hordeum/crescimento & desenvolvimento , NADPH Oxidases/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Sementes/crescimento & desenvolvimento , Sementes/metabolismo , Regulação da Expressão Gênica no Desenvolvimento/efeitos dos fármacos , Regulação da Expressão Gênica de Plantas/efeitos dos fármacos , Germinação/efeitos dos fármacos , Germinação/genética , Hordeum/efeitos dos fármacos , Hordeum/genética , Oniocompostos/farmacologia , Plântula/efeitos dos fármacos , Plântula/crescimento & desenvolvimento
17.
J Plant Physiol ; 192: 71-4, 2016 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-26871505

RESUMO

It is well known that some nitrogen in the vegetative organs is redistributed to the seeds during seed filling in soybean (Glycine max [L.] Merrill). This redistribution is considered to affect the seed yield of soybean. However, it is still not clear when the nitrogen moves from the vegetative part to the seeds, and the relationship between nitrogen redistribution and leaf senescence has not been clarified. The soybean variety Fukuyutaka was grown in the experimental field of Saga University, Japan from 22 July to 31 October, 2014. After the first flower stage (R1), the plant samples were collected weekly and were separated into leaf, petiole, stem, podshell and seed. The nitrogen concentrations in each plant part were determined. Fresh leaf samples were provided for the determination of soluble protein and autophagy gene GmATG8c expression. The nitrogen that accumulated in the vegetative parts reached its highest level at 60days after sowing (DAS), then began to decrease at 73DAS (R6). This decrease is considered to be the consequence of nitrogen redistribution from the vegetative parts to the seeds. The movement of nitrogen from the vegetative parts to the seeds was estimated to occur at around 73DAS (R6). At this stage, leaf SPAD values, leaf nitrogen, and soluble protein concentrations began to decrease simultaneously, suggesting the onset of leaf senescence. Furthermore, the expression of the autophagy gene GmATG8c in the leaves increased dramatically from 73 to 85DAS, which is the duration of nitrogen redistribution. The results suggest that the nitrogen redistribution from the vegetative parts to the seeds could be one of the initiating factors of leaf senescence, and the autophagy gene GmATG8c was associated with this process.


Assuntos
Regulação da Expressão Gênica de Plantas , Glycine max/genética , Nitrogênio/metabolismo , Família da Proteína 8 Relacionada à Autofagia/genética , Família da Proteína 8 Relacionada à Autofagia/metabolismo , Biomassa , Folhas de Planta/genética , Folhas de Planta/metabolismo , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Caules de Planta/genética , Caules de Planta/metabolismo , Plantas Geneticamente Modificadas , Sementes/genética , Sementes/metabolismo , Glycine max/metabolismo
18.
PLoS One ; 10(11): e0143173, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26579718

RESUMO

Reactive oxygen species (ROS) promote the germination of several seeds, and antioxidants suppress it. However, questions remain regarding the role and production mechanism of ROS in seed germination. Here, we focused on NADPH oxidases, which produce ROS. After imbibition, NADPH oxidase mRNAs were expressed in the embryo and in aleurone cells of barley seed; these expression sites were consistent with the sites of ROS production in the seed after imbibition. To clarify the role of NADPH oxidases in barley seed germination, we examined gibberellic acid (GA) / abscisic acid (ABA) metabolism and signaling in barley seeds treated with diphenylene iodonium chloride (DPI), an NADPH oxidase inhibitor. DPI significantly suppressed germination, and suppressed GA biosynthesis and ABA catabolism in embryos. GA, but not ABA, induced NADPH oxidase activity in aleurone cells. Additionally, DPI suppressed the early induction of α-amylase by GA in aleurone cells. These results suggest that ROS produced by NADPH oxidases promote GA biosynthesis in embryos, that GA induces and activates NADPH oxidases in aleurone cells, and that ROS produced by NADPH oxidases induce α-amylase in aleurone cells. We conclude that the ROS generated by NADPH oxidases regulate barley seed germination through GA / ABA metabolism and signaling in embryo and aleurone cells.


Assuntos
Germinação , Hordeum/citologia , Hordeum/embriologia , NADPH Oxidases/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Sementes/citologia , Sementes/enzimologia , Ácido Abscísico/metabolismo , Cálcio/farmacologia , Inibidores Enzimáticos/farmacologia , Regulação Enzimológica da Expressão Gênica/efeitos dos fármacos , Regulação da Expressão Gênica de Plantas/efeitos dos fármacos , Germinação/efeitos dos fármacos , Giberelinas/biossíntese , Hordeum/enzimologia , Hordeum/genética , Peróxido de Hidrogênio/metabolismo , Íons , NADPH Oxidases/antagonistas & inibidores , NADPH Oxidases/genética , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Sementes/efeitos dos fármacos , Superóxidos/metabolismo , alfa-Amilases/metabolismo
19.
Int J Surg ; 12(9): 936-9, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25091399

RESUMO

BACKGROUND: Appropriate postoperative analgesia is crucial in fast-track surgery, which is a multimodal therapeutic strategy that aims toward enhanced postoperative recovery and shortened hospital stay. Paravertebral block (PVB) has been reported to be as effective as thoracic epidural blockade (TEB), but PVB is not often employed for video-assisted thoracoscopic surgery (VATS) for 2 reasons. First, TEB is still the gold standard for thoracic surgery, and second, thoracoscopic insertion of a PVB catheter is challenging. METHODS: In this retrospective observational study, 185 patients who underwent VATS and thoracoscopic paravertebral catheterization were analyzed. Postoperatively, the patients were continuously administered a local anesthetic (0.5% bupivacaine hydrochloride or 0.2% ropivacaine hydrochloride). Additionally, they were given an oral non-steroidal anti-inflammatory drug (NSAID) as needed. Intramuscular/intravenous pentazocine was administered as a rescue medication. The effect of pain control was measured in terms of the frequency of NSAID taken orally and the necessity for a rescue drug on postoperative days (POD) 0, 1, 2, and 3. RESULTS: The mean age of the 185 patients included in the study was 67 years (Confidence Interval: 66-69). The mean frequency of NSAID use was 0.67 (0-3), 1.59 (0-4), 1.43 (0-4), and 1.33 (0-4) on POD 0, 1, 2, and 3, respectively. 32 (17.3%) and 3 patients (1.6%) were administered a rescue medication on POD 0 and 1, respectively. The most common postoperative complication was nausea/vomiting, which occurred in 17 patients (9.1%). CONCLUSIONS: PVB may greatly contribute to enhanced recovery after thoracic surgery owing to effective analgesia and fewer side effects.


Assuntos
Amidas/administração & dosagem , Anestésicos Locais/administração & dosagem , Bupivacaína/administração & dosagem , Bloqueio Nervoso/métodos , Dor Pós-Operatória/prevenção & controle , Cirurgia Torácica Vídeoassistida , Idoso , Anti-Inflamatórios não Esteroides/uso terapêutico , Feminino , Humanos , Tempo de Internação , Masculino , Medição da Dor , Estudos Retrospectivos , Ropivacaina
20.
J Plant Physiol ; 171(8): 615-8, 2014 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-24709153

RESUMO

The cereal aleurone layer is a secretory tissue that produces enzymes to hydrolyze the starchy endosperm during germination. We recently demonstrated that reactive oxygen species (ROS), produced in response to gibberellins (GA), promoted GAMyb expression, which induces α-amylase expression in barley aleurone cells. On the other hand, ROS levels increase during programmed cell death (PCD) in barley aleurone cells, and GAMyb is involved in PCD of these cells. In this study, we investigated whether the ROS produced in response to GA regulate PCD directly by using mutants of Slender1 (SLN1), a DELLA protein that negatively regulates GA signaling. The wild-type, the sln1c mutant (which exhibits gibberellin-type signaling even in the absence of GA), and the Sln1d mutant (which is gibberellin-insensitive with respect to α-amylase production) all produced ROS in response to GA, suggesting that ROS production in aleurone cells in response to GA is independent of GA signaling through this DELLA protein. Exogenous GA promoted PCD in the wild-type. PCD in sln1c was induced even without exogenous GA (and so without induction of ROS), whereas PCD in Sln1d was not induced in the presence of exogenous GA, even though the ROS content increased significantly in response to GA. These results suggest that PCD in barley aleurone cells is not directly stimulated by ROS produced in response to GA but is regulated by GA signaling through DELLA protein.


Assuntos
Apoptose/fisiologia , Giberelinas/farmacologia , Hordeum/efeitos dos fármacos , Hordeum/fisiologia , Espécies Reativas de Oxigênio/metabolismo , Endosperma/citologia , Endosperma/metabolismo , Germinação/efeitos dos fármacos , Hordeum/citologia , Hordeum/genética , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Transdução de Sinais
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