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1.
Plant Biotechnol J ; 15(10): 1309-1321, 2017 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-28258966

RESUMO

Brassinosteroids (BRs) are essential hormones that play crucial roles in plant growth, reproduction and response to abiotic and biotic stress. In Arabidopsis, AtCYP85A2 works as a bifunctional cytochrome P450 monooxygenase to catalyse the conversion of castasterone to brassinolide, a final rate-limiting step in the BR-biosynthetic pathway. Here, we report the functional characterizations of PtCYP85A3, one of the three AtCYP85A2 homologous genes from Populus trichocarpa. PtCYP85A3 shares the highest similarity with AtCYP85A2 and can rescue the retarded-growth phenotype of the Arabidopsis cyp85a2-2 and tomato dx mutants. Constitutive expression of PtCYP85A3, driven by the cauliflower mosaic virus 35S promoter, increased the endogenous BR levels and significantly promoted the growth and biomass production in both transgenic tomato and poplar. Compared to the wild type, plant height, shoot fresh weight and fruit yield increased 50%, 56% and 43%, respectively, in transgenic tomato plants. Similarly, plant height and stem diameter increased 15% and 25%, respectively, in transgenic poplar plants. Further study revealed that overexpression of PtCYP85A3 enhanced xylem formation without affecting the composition of cellulose and lignin, as well as the cell wall thickness in transgenic poplar. Our finding suggests that PtCYP85A3 could be used as a potential candidate gene for engineering fast-growing trees with improved wood production.


Assuntos
Brassinosteroides/biossíntese , Sistema Enzimático do Citocromo P-450/metabolismo , Populus/enzimologia , Madeira/crescimento & desenvolvimento , Sequência de Aminoácidos , Biomassa , Sistema Enzimático do Citocromo P-450/genética , Lycopersicon esculentum , Proteínas de Plantas/metabolismo , Brotos de Planta/crescimento & desenvolvimento , Plantas Geneticamente Modificadas , Populus/genética , Populus/crescimento & desenvolvimento , Árvores/enzimologia , Árvores/crescimento & desenvolvimento , Madeira/citologia
2.
Knee Surg Sports Traumatol Arthrosc ; 22(7): 1517-28, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-23749215

RESUMO

PURPOSE: The purpose of this meta-analysis was to examine the efficacy and safety of single-dose intra-articular bupivacaine in the management of pain after knee arthroscopic surgery. METHOD: The comprehensive literature search, using MEDLINE, the Cochrane Central Register of Controlled Trials, and Embase databases, was conducted to identify randomized controlled trials that used single-dose intra-articular bupivacaine for postoperative pain. The relative risk (RR), weighted mean difference (WMD), and their corresponding 95 % confidence intervals (CIs) were calculated using RevMan(®) statistical software. RESULT: Twenty-three studies (n = 1287) were included (647 subjects in bupivacaine group and 640 subjects in the control group). Statistically significant differences were observed in the VAS values (WMD -1.1; 95 % CI -1.7 to -0.5), number of patients requiring supplementary analgesia (RR 0.83; 95 % CI 0.74-0.94), and time to first analgesic request (WMD 129.3; 95 % CI 15.4-243.1) among the bupivacaine group when compared to the control group. However, short-term side effects had no significant difference between these two groups (RR 0.73; 95 % CI 0.44-1.24). CONCLUSIONS: On the basis of the currently available literature, single-dose intra-articular bupivacaine was shown to be significantly better than placebo at relieving pain after knee arthroscopic surgery. More high-quality randomized controlled trials with long follow-up are highly required for examining the safety of single-dose intra-articular bupivacaine. Besides, routine use of single-dose intra-articular bupivacaine is still an effective way for pain management after knee arthroscopic surgery.


Assuntos
Anestésicos Locais/administração & dosagem , Artroscopia , Bupivacaína/administração & dosagem , Dor Pós-Operatória/tratamento farmacológico , Humanos , Injeções Intra-Articulares , Medição da Dor , Ensaios Clínicos Controlados Aleatórios como Assunto
3.
Surg Innov ; 21(2): 221-8, 2014 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-23965590

RESUMO

OBJECTIVES: To evaluate the learning curve for endoscopic thyroidectomy by the breast approach (ETBBA) based on the cumulative summation (CUSUM) technique. METHODS: The study included 110 consecutive patients who underwent ETBBA by a single surgeon between January 2009 and May 2012 at the Xiangya Hospital of Central South University, Changsha, China. The learning curve was evaluated using the CUSUM technique. The patients were chronologically arranged into 3 phases by the CUSUM analysis for operative time. Demographic data and operative parameters were also analyzed. RESULTS: The mean operative time (OT) was 125.3 minutes. The conversion rate for technical difficulties and the definitive complication rate were 6.4% and 10%, respectively. The learning curve was analyzed mainly by OT using the CUSUM technique. There was a significant improvement in the average OT (P < .05) after the first 27 patients and again after the first 67 patients (P < .05). A downward trend in OT was found up to the last patient. There were similarities in gender, tumor size, extent of surgery, blood loss, histology, hospital stay, conversion rate, and complications among the 3 phases. Comparison of 2 neighboring phases also showed no significant differences in age. CONCLUSIONS: ETBBA performed by surgeons has a remarkable learning curve. There were 27 cases in the early stage of the learning curve, whereas mastery level could be achieved with 67 cases.


Assuntos
Mama/cirurgia , Endoscopia/educação , Endoscopia/métodos , Curva de Aprendizado , Tireoidectomia/educação , Tireoidectomia/métodos , Adolescente , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias , Resultado do Tratamento , Adulto Jovem
4.
Clin J Pain ; 30(7): 630-8, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-24281279

RESUMO

OBJECTIVES: This meta-analysis compared the earliest clinical effects of intra-articular bupivacaine and morphine for pain management following arthroscopic knee surgery. MATERIALS AND METHODS: A comprehensive literature search was conducted using MEDLINE (1966 to 2013), the Cochrane Central Register of Controlled Trials (CENTRAL), Embase, and Google Scholar databases for identification of randomized-controlled trials that compared IA bupivacaine and morphine for postoperative pain. The relative risk, weighted mean difference (WMD), and their corresponding 95% confidence intervals (CI) were calculated using RevMan statistical software. RESULTS: Bupivacaine and morphine group had similar acute postoperative pain scores (WMD: 0.07; 95% CI, -0.18 to 0.32; P=0.60); number of patients requiring supplementary analgesia (relative risk: 0.74; 95% CI, 0.42 to 1.31; P=0.30) for the trials in this meta-analysis (n=13); and side effects (relative risk: 0.63; 95% CI, 0.39 to 1.02, P=0.06). Even though, the time to first analgesic request resulted in a significant difference (WMD: 66.59; 95% CI, 11.75 to 122.14, P=0.02), this result was not supported by the sensitivity analysis. CONCLUSIONS: On the basis of the currently available literature, this study failed to demonstrate a significant difference between single-dose intra-articular bupivacaine and morphine at the end of the arthroscopic knee surgery in terms of pain relief, need for supplementary analgesics, times interval before the first request for additional analgesic, and short-term side effects. LEVEL OF EVIDENCE: Level II-meta-analysis of Level I and II studies.


Assuntos
Anestésicos/uso terapêutico , Artroscopia/efeitos adversos , Bupivacaína/uso terapêutico , Morfina/uso terapêutico , Dor Pós-Operatória/tratamento farmacológico , Dor Pós-Operatória/etiologia , Adulto , Bases de Dados Factuais/estatística & dados numéricos , Feminino , Humanos , Joelho/cirurgia , Masculino , Metanálise como Assunto , Pessoa de Meia-Idade , Medição da Dor
5.
Patient Prefer Adherence ; 7: 1061-6, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-24204125

RESUMO

PURPOSE: The aim of our study was to assess, for the first time, the validity, reliability, and acceptability of the European Organization for Research and Treatment of Cancer (EORTC) Quality of Life questionnaire (QLQ) cervical cancer module (CX24) in Chinese cervical cancer patients. PATIENTS AND METHODS: One hundred fifteen outpatients with cervical cancer in the First Affiliated Hospital of Xinxiang Medical University from May 2013 to July 2013 were included in this study. All participants self-administered the EORTC QLQ-CX24 and the core questionnaire (EORTC QLQ-C30), and the Karnofsky Performance Scale was performed to evaluate scores. Data were analyzed with Cronbach's α coefficient, Pearson correlation test, multitrait scaling analysis, and Mann-Whitney U test. RESULTS: Scale reliability was confirmed by Cronbach's α coefficients for internal consistency, which ranged from 0.71 to 0.82. Convergent and discriminant validity were confirmed by multitrait scaling analysis, which revealed three (3.4%) scaling errors for symptom experience scales and zero (0%) for body image as well as sexual/vaginal functioning scales. Higher missing value rate occurred in sexuality-related items. The clinical validity of the Chinese version of the EORTC QLQ-CX24 was demonstrated by the ability to discriminate among patients in different International Federation of Gynecology and Obstetrics stages. CONCLUSION: The EORTC QLQ-CX24 was proved to be a reliable and valid instrument with which to measure the quality of life in cervical cancer patients in the People's Republic of China.

6.
J Int Med Res ; 41(2): 265-75, 2013 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-23569022

RESUMO

OBJECTIVES: A meta-analysis to compare complication rates following volar or dorsal surgical fixation of distal radius fracture. METHODS: A detailed search of PubMed®/MEDLINE® was undertaken to identify randomized and nonrandomized controlled trials published before 25 August 2012 that compared volar with dorsal fixation, in patients with distal radius fracture. RESULTS: A quantitative meta-analysis of 12 trials (952 patients) was performed. There was no between-group difference in the overall rate of complications. Volar fixation was associated with significant increases in neuropathy (relative risk [RR] 2.19; 95% confidence intervals [CI] 1.27, 3.76) and carpal tunnel syndrome (RR 4.56; 95% CI 1.02, 20.44), and a reduction in tendon irritation, compared with the dorsal approach (RR 0.38; 95% CI 0.17, 0.86). CONCLUSIONS: Dorsal fixation offers a lower risk of neuropathy and carpal tunnel syndrome than the volar approach, but a higher risk of tendon irritation. Patients with a distal radius fracture can expect similar outcomes after volar or dorsal surgery.


Assuntos
Fixação Interna de Fraturas/efeitos adversos , Placa Palmar/cirurgia , Complicações Pós-Operatórias/etiologia , Fraturas do Rádio/cirurgia , Síndrome do Túnel Carpal/etiologia , Humanos , Dor Pós-Operatória/etiologia , Viés de Publicação , Fatores de Risco , Tendões/patologia
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