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| 1 | Helicobacter pylori infection and endocrine disorders:Is there a link?显示文摘Helicobacter pylori(H pylori) infection is a leading world-wide infectious disease as it affects more than half of the world population and causes chronic gastritis,peptic ulcer disease and gastric malignancies.The infection elicits a chronic cellular inflammatory response in the gastric mucosa.However,the effects of this local inflammation may not be confi ned solely to the digestive tract but may spread to involve extraintestinal tissues and/or organs.Indeed,H pylori infection has been epidemiologically linked to extra-digestive conditions and diseases.In this context,it has been speculated that H pylori infection may be responsible for various endocrine disorders,such as autoimmune thyroid diseases,diabetes mellitus,dyslipidemia,obesity,osteoporosis and primary hyperparathyroidism.This is a review of the relationship between H pylori infection and these endocrine disorders. | Konstantinos X Papamichael Garyphallia Papaioannou Helen Karga Anastasios Roussos Gerassimos J Mantzaris | 2009 | World Journal of Gastroenterology2009，15，22： | 42 |
| 2 | 2016年国际抗癫痫联盟癫痫发作分类的更新及介绍显示文摘国际抗癫痫联盟(ILAE)提出了癫痫发作类型的操作性修订方案。此修订的目的包括认识到一些发作类型既可以是局灶起源亦可以为全面起源,允许临床在不能观察到发作起源的情况下进行发作分类,纳入某些尚不了解的发作类型,以及采用更加易懂的命名。由于现有知识不足以形成一个科学的分类方案,2016年的分类方案是在1981年和2010年分类的基础上进行的操作性(实用性)修订。新分类的变化包括:(1)'部分性'改为'局灶性';(2)起源未知的癫痫发作也可以归类;(3)知觉状态用作局灶性发作的区分因素;(4)删除'认知障碍性'、'简单部分性'、'复杂部分性'、'精神性'、'继发全面性'等术语;(5)认识到局灶性强直、阵挛、失张力、肌阵挛和癫痫性痉挛发作,这些发作也有双侧性类型;(6)增加了新的全面性发作类型:伴眼睑肌阵挛的失神发作,肌阵挛失神发作,肌阵挛-失张力发作,阵挛-强直-阵挛发作,癫痫性痉挛;癫痫性痉挛可以是局灶性、全面性或起源不明性;(7)双侧强直阵挛发作取代了继发全面性发作。新的分类方案并未进行根本性的改变,但可以使癫痫发作类型的命名有较大的灵活性和透明度。 | Robert S Fisher J Helen Cross 陈佳 王玉平 吴逊 | 2017 | 癫痫杂志2017，3，1： | 25 |
| 3 | 促进2型糖尿病患者行为的可持续性改变:澳大利亚美好生活俱乐部的自我健康管理计划的评价显示文摘本文分析了澳大利亚美好生活俱乐部18个月的监测数据。美好生活俱乐部是澳大利亚联邦政府资助的'分担卫生服务项目'的一个研究项目,旨在促进50岁及以上糖尿病患者的慢性病自我管理。该项目的干预措施是跨理论行为改变模型和通过电话的动机谈话技术。在患者参加项目的基线、第6个月、第18个月收集数据。数据包括人口学信息、慢性病种类、健康行为、对健康的认识、锻炼程度、功能状态、自我效能、情绪状态、服务利用,以及9个目标行为的改变阶段。本文报告了150名接受18个月监测的患者数据。结果表明,在8个自我评价的症状中,有6个症状明显改善,差异有统计学意义。接受干预的患者对自我健康管理的信心在短期内明显增强。患者的卫生服务利用呈现减少趋势,但无统计学差异。卫生服务利用没有减少的原因,归因于参加者之间卫生服务利用方式的差异较大。参加项目第6个月时,患者行走的活动量增加,但第18个月时回到基线水平。这些发现表明,动机谈话技术能够在行为改变的最初阶段发挥作用,不过如果要长期地维持行为改变,则需要确定个体化和结构性的策略。 | Colette Browning Shane Thomas Jane Sims Lindner Helen Kelly J | 2009 | 中国全科医学2009，12，23： | 18 |
| 4 | Role of soluble triggering receptor expressed on myeloid cells in inflammatory bowel disease显示文摘瞄准:为了调查可溶的被触发的可能的角色,受体在煽动性的肠疾病(IBD ) 的致病在骨髓的上表示了 cells-1 (sTREM-1 ) 。方法:58 个病人被注册;十九个健康志愿者用作控制;8 个病人与 Crohn 的疾病被诊断,并且 31 与 ulcerative。有 Crohn 的疾病和 ulcerative 的病人的临床、内视镜的活动索引分别地被估计。在承认之上,血被取样;sTREM-1 和 TNFalpha 被 thiobarbitourate 试金被免疫分析和 malondialdehyde (MDA ) 测量,在通过一个 HPLC 系统的经过以后。结果:控制,有 Crohn 的疾病的病人和有 ulcerative 的病人的 TNFalpha 的中部的 +/- SE 是 6.02 +/- 3.94, 7.98 +/- 5.08 (P = NS 对控制) ,并且 8.45 +/- 4.15 ng/L (P = 0.018 对控制) 分别地。sTREM-1 的各自的价值是 53.31 +/- 32.93, 735.10 +/- 197.17 (P = 0.008 对控制) 并且 435.82 +/- 279.71 ng/L (P = 0.049 对控制) 。sTREM-1 断然与 Crohn 的疾病活动索引和 ulcerative 的临床、内视镜的活动索引被相关(P = 0.002, 0.001 和 0.009,分别地) 。有 ulcerative 的病人的 sTREM-1 断然与 TNFalpha 被相关(P = 0.001 ) 。结论:sTREM-1 似乎在与肠粘膜的炎性反应的度的关联在 IBD 作为一个新奇调停人表现。 | Michalis Tzivras Vassilios Koussoulas Evangelos J Giamarellos-Bourboulis Dimitrios Tzivras Thomas Tsaganos Pantelis Koutoukas Helen Giamarellou Athanasios Archimandritis | 2006 | World Journal of Gastroenterology2006，12，21： | 17 |
| 5 | Monocytes in systematic inflammatory response syndrome:Differences between sepsis and acute pancreatitis显示文摘AIM: To unravel the differences between systematic in- flammatory response syndrome (SIRS) of acute pancre- atitis compared to the same syndrome in sepsis. METHODS: Twenty-five patients were enrolled, 12 with sepsis and 13 acute pancreatitis. After diagnosis 20 ml blood was sampled. Half were assayed for isolation of monocytes and 10 ml was centrifuged for serum test of tumor necrosis factor alpha (TNFα) and interleukin-6 (IL-6). Half of monocytes were incubated in the presence of patients’ serum and supernatants were collected. The other half was treated for estimation of optical photom- etry under caspase-3 inhibition. TNFα and IL-6 were es- timated by an enzyme immunoassay. RESULTS: median ± SE of serum IL-6 in septic patients and acute pancreatitis patients was 192.30 ± 35.40 ng/L and 21.00 ± 16.05 ng/L, respectively (P < 0.01). Re- spective values of caspase-3 were 0.94 ± 0.17 pmol/min 104 cells and 0.34 ± 0.09 pmol/min 104 cells (P < 0.05). IL-6 of monocyte supernatants of patients with sepsis was significantly increased after addition of patients’ serum, while that of patients with acute pancreatitis did not show significant difference. CONCLUSION: The data have shown that monocyte activity is different between acute pancreatitis and sepsis. This phenomenon might be explained as a different pathway to the pro-inflammatory cytokines release or could be a novel anti-inflammatory response in acute pancreatitis. | Vassilios Koussoulas Michalis Tzivras Vassiliki Karagianni Ekaterini Spyridaki Diamantis Plachouras Helen Giamarellou Evangelos J Giamarellos-Bourboulis | 2006 | World Journal of Gastroenterology2006，12，41： | 13 |
| 6 | Evidence for the role of gastric mucosa at the secretion of soluble triggering receptor expressed on myeloid cells(strem-1) in peptic ulcer disease显示文摘AIM: To investigate the role of gastric mucosa at the secretion of sTREM-1 in peptic ulcer. METHODS: Seventy two patients were enrolled; 35 with duodenal, 21 with gastric ulcer and 16 with chronic gastritis. Patients were endoscoped and gastric juice was aspirated. Patients with duodenal and gastric ulcer underwent a second endoscopy post-treatment. Biopsies were incubated in the absence/presence of endotoxins or gastric juice. Supernatants were collected and sTREM-1 and TNFα were measured by enzyme immunoabsorbent assays. Scoring of gastritis was performed before and after treatment according to updated Sydney score. RESULTS: Patients with duodenal and gastric ulcer and those with chronic gastritis had similar scores of gastritis. sTREM-1 was higher in supernatants of tissue samples of H pylori-positive than of H pylori-negative patients with gastric ulcer. Median (± SE) sTREM-1 was found increased in supernatants of patients with gastric ulcer before treatment (203.21 ± 88.91 pg/1000 cells) compared to supernatants either from the same patients post-treatment (8.23 ± 5.79 pg/1000 cells) or from patients with chronic gastritis (6.21 ± 0.71 pg/1000 cells) (P < 0.001 and < 0.001, respectively). Similar differences for sTREM-1 were recorded among LPS-stimulated tissue samples of patients (P = 0.001). Similar differences were not found for TNFα. Positive correlations were found between sTREM-1 of supernatants from patients withboth duodenal and gastric ulcer before treatment and the degree of infiltration of neutrophils and monocytes. CONCLUSION: sTREM-1 secreted by the gastric mucosa is an independent mechanism connected to the pathogenesis of peptic ulcer. sTREM-1 was released at the presence of H pylori from the inflamed gastric mucosa in the field of gastric ulcer. | Vassilios Koussoulas Spyridon Vassiliou Ekaterini Spyridaki Maria Demonakou Ilia Vaki Charalambos Barbatzas Helen Giamarellou Evangelos J Giamarellos-Bourboulis | 2007 | World Journal of Gastroenterology2007，13，34： | 11 |
| 7 | K-ras^G12V transformation leads to mitochondrial dysfunction and a metabolic switch from oxidative phosphorylation to glycolysis显示文摘增加的氧气的 glycolysis 和氧化应力是癌症房间新陈代谢的重要特征,但是内在的生物化学、分子的机制留下逃犯。用四圜素可诱导的模型,我们显示出 K 地岬 G12V 原因 mitochondrial 机能障碍,导致反应的氧的减少的呼吸,提高的 glycolysis,和增加的产生种类。K 地岬蛋白质与线粒体被联系,并且导致呼吸的链建筑群的快速的抑制 -- 我和在由影响 cyclosporin 敏感的渗透的 mitochondrial transmembrane 潜力的减少转移毛孔。而且, K 地岬 在 vitro 的 G12V 表示提高转变房间的能力允许新陈代谢的改编到高 glycolytic 新陈代谢在 vivo 形成肿瘤。我们的学习建议 mitochondrial 机能障碍的那正式就职是由 K 地岬 G12V 在癌症房间引起新陈代谢的变化和 ROS 应力,并且支持肿瘤开发。 | Yumin Hu Weiqin Lu Gang Chen Peng Wang Zhao Chen Yan Zhou Marcia Ogasawara Dunyaporn Trachootham Li Feng Helene Pelicano Paul J Chiao Michael J Keating Guillermo Garcia-Manero Peng Huang | 2012 | Cell Research2012，22，2： | 6 |
| 8 | Short-term endpoints of conventional versus laparoscopic-assisted surgery in patients with colorectal cancer (MRC CLASICC trial): multicentre, randomised controlled trial显示文摘 | Pierre J Guillou Philip Quirke Helen Thorpe Joanne Walker David G Jayne Adrian MH Smith Richard M Heath Julia M Brown | 2005 | The Lancet . 2005 (9472)2005，，9472： | 6 |
| 9 | Counter-regulatory phosphatases TNAP and NPP1 temporally regulate tooth root cementogenesis显示文摘Cementum is critical for anchoring the insertion of periodontal ligament fibers to the tooth root. Several aspects of cementogenesis remain unclear, including differences between acellular cementum and cellular cementum, and between cementum and bone.Biomineralization is regulated by the ratio of inorganic phosphate(Pi) to mineral inhibitor pyrophosphate(PPi), where local Piand PPi concentrations are controlled by phosphatases including tissue-nonspecific alkaline phosphatase(TNAP) and ectonucleotide pyrophosphatase/phosphodiesterase 1(NPP1). The focus of this study was to define the roles of these phosphatases in cementogenesis. TNAP was associated with earliest cementoblasts near forming acellular and cellular cementum. With loss of TNAP in the Alpl null mouse, acellular cementum was inhibited, while cellular cementum production increased, albeit as hypomineralized cementoid. In contrast, NPP1 was detected in cementoblasts after acellular cementum formation, and at low levels around cellular cementum. Loss of NPP1 in the Enpp1 null mouse increased acellular cementum, with little effect on cellular cementum.Developmental patterns were recapitulated in a mouse model for acellular cementum regeneration, with early TNAP expression and later NPP1 expression. In vitro, cementoblasts expressed Alpl gene/protein early, whereas Enpp1 gene/protein expression was significantly induced only under mineralization conditions. These patterns were confirmed in human teeth, including widespread TNAP, and NPP1 restricted to cementoblasts lining acellular cementum. These studies suggest that early TNAP expression creates a low PPienvironment promoting acellular cementum initiation, while later NPP1 expression increases PPi, restricting acellular cementum apposition. Alterations in PPihave little effect on cellular cementum formation, though matrix mineralization is affected. | Laura E Zweifler Mudita K Patel Francisco H Nociti Jr Helen F Wimer Jose L Milln Martha J Somerman Brian L Foster | 2015 | International Journal of Oral Science2015，7，1： | 5 |
| 10 | 缺血性间歇性阴茎异常勃起的药物治疗:当前的文献综述显示文摘阴茎异常勃起是指阴茎在没有受性刺激的情况下,发生的不自主的长时间勃起。目前,关于这种异常勃起的病理生理学信息很少,所以我们对此疾病也知之甚少。这种不可逆的勃起伤害以及导致的勃起功能障碍使这种疾病的并发症也很可怕。间歇性阴茎异常勃起尽管很少见,但在镰状细胞疾病(SCD)患者中发生率很高,而且也迫切需要制定指南来治疗这些病人的勃起功能问题。因为对这种疾病的发病机制不是很清楚,所以对泌尿外科医生来说,这种疾病的药物治疗也是一个极大的挑战。还需要更多的研究让我们可以有效确定这些病人的治疗方法,以预防作为最终目的。本综述主要介绍间歇性阴茎异常勃起疾病及其临床意义,尤其针对那些有SCD的病人。另外,还讨论该疾病可能的病理生理学机制,总结和讨论当前和将来的药物治疗策略。 | Helen R Levey Omer Kutlu Trinity J Bivalacqua | 2012 | Asian Journal of Andrology2012，14，1： | 5 |
| 11 | Short-term endpoints of conventional versus laparoscopic-assisted surgery in patients with colorectal cancer (MRC CLASICC trial): multicentre, randomised controlled trial显示文摘 | Pierre J Guillou Philip Quirke Helen Thorpe Joanne Walker David G Jayne Adrian MH Smith Richard M Heath Julia M Brown | 2005 | The Lancet2005，，9472： | 4 |
| 12 | Nat Genet:单基因突变导致过敏性皮炎的发生显示文摘最近,研究者们鉴定出了一类导致神经性皮炎发生的关键基因突变:CARDll。来自美国NIH过敏与传染病研究所的研究者们通过对四个没有血缘关系的患病家庭进行分析,发现了这一导致疾病产生的基因、 | Chi A Ma, Yuan Zhang, Michael A Weinreich, Jonathan J Lyons, Celeste G Nelson, Thomas DiMaggio, Kelly D Stone, Joshua D Milner Jeffrey R Stinson, Elisa Ruffo, Batsukh Dorjbal, Swadhinya Arjunaraja, Kelsey Voss, Andrew L Snow Jordan K Abbott, Pia J Hauk, Paul R Reynolds, Erwin W Gelfand Elisa Ruffo Salomé Glauzy, Natsuko Yamakawa, Eric Meffre Jennifer Stoddard, Julie Niemela, Sergio D Rosenzweig Yu Zhang, Helen F Matthews Joshua J McElwee Nina Jones Alejandro Palma, Matías Oleastro, Emma Prieto, Andrea R Bernasconi, Geronimo Dubra, Silvia Danielian, Jonathan Zaiat, Marcelo A Marti Brian Kim Megan A Cooper Neil Romberg | 2017 | 现代生物医学进展2017，17，27： | 3 |
| 13 | Dietary supplementation of Bacillus subtilis influenced intestinal health of weaned pigs experimentally infected with a pathogenic E. coli显示文摘Background: There is growing evidence to support the beneficial effects of supplementing direct-fed microbials(DFM) on performance, health status, and immune responses of weaned pigs. Therefore, the objective of this study was to investigate dietary supplementation of Bacillus subtilis(DSM 25841) on growth performance, diarrhea, gut permeability and immunity of weaned pigs experimentally infected with a pathogenic F-18 Escherichia coli(E. coli).Results: The F18 E. coli infection reduced(P < 0.05) growth performance and intestinal villi height, whereas increased(P < 0.05) diarrhea and transcellular and paracellular permeability in the jejunum compared with non-challenged control. Supplementation of Bacillus subtilis linearly enhanced average daily gain of E. coli infected pigs from d 0 to 5 post-inoculation(PI)(P < 0.05) and d 0 to 11 PI(P = 0.058). Supplementation of high dose of Bacillus subtilis reduced(P < 0.05) both transcellular and paracellular permeability on d 5 and d11 PI compared with the E. coli infected pigs fed with control diet. E. coli infection up-regulated(P < 0.05)the m RNA expression of SLC5 A10(soluble carrier family 5 member 10) and MUC2(mucin 2) on d 5 PI, but down-regulated(P < 0.05) expression of SLC5 A10, MUC2, and CLDN1 on d 11 PI in jejunal mucosa when pigs were fed with the control diet. Supplementation of Bacillus subtilis linearly up-regulated(P < 0.05) the m RNA expression of CFTR and ZO1 on d 5 PI and SLC5 A10 and MUC2 on d 11 PI in jejunal mucosa of E. coli infected pigs. In addition, E. coli infection increased(P < 0.05) the m RNA expression of several immune genes(IL1 A, IL1 B, and IL7 on d 5 PI, and IL1 B, IL6, IL7, and TNF on d 11 PI) in the ileal mucosa of weaned pigs. Inclusion of Bacillus subtilis to control diet linearly down-regulated gene expression of IL1 A on d 5 PI(P = 0.07) and IL6 on d 11 PI(P < 0.05) in ileal mucosa of E. coli infected pigs.Conclusions: Supplementation of Bacillus subtilis(DSM 25841) enhanced growth rate and improved gut barrier function of weaned pigs experimentally infected with a pathogenic E. coli. | Kwangwook Kim Yijie He Xia Xiong Amy Ehrlich Xunde Li Helen Raybould Edward R.Atwill Elizabeth A.Maga Jens JΦrgensen Yanhong Liu | 2019 | Journal of Animal Science and Biotechnology2019，10，4： | 3 |
| 14 | Macrophage secretory products induce an inflammatory phenotype in hepatocytes显示文摘AIM:To investigate the influence of macrophages on hepatocyte phenotype and function.METHODS:Macrophages were differentiated from THP-1 monocytes via phorbol myristate acetate stimulation and the effects of monocyte or macrophageconditioned medium on HepG2 mRNA and protein expression determined.The in vivo relevance of these findings was confirmed using liver biopsies from 147 patients with hepatitis C virus(HCV)infection.RESULTS:Conditioned media from macrophages,but not monocytes,induced a transient morphological change in hepatocytes associated with upregulation of vimentin(7.8±2.5-fold,P=0.045)and transforming growth factor(TGF)-β1(2.6±0.2-fold,P<0.001)and downregulation of epithelial cadherin(1.7±0.02-fold,P=0.017)mRNA expression.Microarray analysis revealed significant upregulation of lipocalin-2(17-fold,P <0.001)and pathways associated with inflammation,and substantial downregulation of pathways related to hepatocyte function.In patients with chronic HCV,realtime polymerase chain reaction and immunohistochemistry confirmed an increase in lipocalin-2 mRNA(F0 1.0 ±0.3,F1 2.2±0.2,F2 3.0±9.3,F3/4 4.0±0.8,P= 0.003)and protein expression(F1 1.0±0.5,F2 1.3± 0.4,F3/4 3.6±0.4,P=0.014)with increasing liver injury.High performance liquid chromatography-tandem mass spectrometry analysis identified elevated levels of matrix metalloproteinase(MMP)-9 in macrophageconditioned medium,and a chemical inhibitor of MMP-9 attenuated the change in morphology and mRNA expression of TGF-β1(2.9±0.2 vs 1.04±0.1,P<0.001) in macrophage-conditioned media treated HepG2 cells.In patients with chronic HCV infection,hepatic mRNA expression of CD163(F0 1.0±0.2,F1/2 2.8±0.3,F3/4 5.3±1.0,P=0.001)and MMP-9(F0 1.0±0.4,F1/2 2.8±0.3,F3/4 4.1±0.8,P=0.011)was significantly associated with increasing stage of fibrosis.CONCLUSION:Secreted macrophage products alter the phenotype and function of hepatocytes,with increased expression of inflammatory mediators,suggesting that hepatocytes actively participate in liver injury. | Michelle Melino Victoria L Gadd Gene V Walker Richard Skoien Helen D Barrie Dinesh Jothimani Leigh Horsfall Alun Jones Matthew J Sweet Gethin P Thomas Andrew D Clouston Julie R Jonsson Elizabeth E Powell | 2012 | World Journal of Gastroenterology2012，18，15： | 3 |
| 15 | Diagnostic accuracy of tests for Helicobacter pylori in an Alaska Native population显示文摘AIM:To evaluate the accuracy of two non-invasivetests in a population of Alaska Native persons. Highrates of Helico bacter pylori(H. pylori) infection,H. pylori treatment failure,and gastric cancer in this population necessitate documentation of infection status atmultiple time points over a patient's life.METHODS:In 280 patients undergoing endoscopy,H. pylori was diagnosed by culture,histology,rapidurease test,13C urea breath test(UBT) ,and immuno-globulin G antibodies to H. pylori in serum. The performances of 13C-UBT and antibody test were compared to a gold standard defined by a positive H. pylori testby culture or,in case of a negative culture result,bypositive histology and a positive rapid urease test.RESULTS:The sensitivity and specificity of the 13C-UBT were 93% and 88%,respectively,relative to thegold standard. The antibody test had an equivalents ensitivity of 93% with a reduced specificity of 68%.The false positive results for the antibody test were as-sociated with previous treatment for an H. pylori infection [relative risk(RR) = 2.8]. High levels of antibodiesto H. pylori were associated with chronic gastritis and male gender,while high scores in the 13C-UBT testwere associated with older age and with the H. pyloribacteria load on histological examination(RR = 4.4) .CONCLUSION:The 13C-UBT out performed the anti-body test for H. pylori and could be used when a non-invasive test is clinically necessary to document treatment out come or when monitoring for reinfection. | Dana L Bruden Michael G Bruce Karen M Miernyk Julie Morris Debby Hurlburt Thomas W Hennessy Helen Peters Frank Sacco Alan J Parkinson Brian J McMahon | 2011 | World Journal of Gastroenterology2011，17，42： | 3 |
| 16 | Short-term endpoints of conventional versus laparoscopic-assisted surgery in patients with colorectal cancer (MRC CLASICC trial): multicentre, randomised controlled trial显示文摘 | Pierre J Guillou Philip Quirke Helen Thorpe Joanne Walker David G Jayne Adrian MH Smith Richard M Heath Julia M Brown | 2005 | 2005 (9472)2005，，9472： | 2 |
| 17 | Causes of encephalitis and differences in their clinical presentations in England: a multicentre, population-based prospective study显示文摘 | Julia Granerod Helen E Ambrose Nicholas WS Davies Jonathan P Clewley Amanda L Walsh Dilys Morgan Richard Cunningham Mark Zuckerman Ken J Mutton Tom Solomon Katherine N Ward Michael PT Lunn Sarosh R Irani Angela Vincent David WG Brown Natasha S Crowcroft | 2010 | The Lancet Infectious Diseases2010，，12： | 2 |
| 18 | Short-term endpoints of conventional versus laparoscopic-assisted surgery in patients with colorectal cancer (MRC CLASICC trial): multicentre, randomised controlled trial显示文摘 | Pierre J Guillou Philip Quirke Helen Thorpe Joanne Walker David G Jayne Adrian MH Smith Richard M Heath Julia M Brown | 2005 | The Lancet2005，，9472： | 2 |
| 19 | The economic implications of using HACCP as a food safety regulatory standard显示文摘 | Laurian J Unnevehr Helen H Jensen | 1999 | Food Policy1999，，6： | 2 |
| 20 | Exogenous cytokinin application to Actinidia chinensis var. deliciosa ‘Hayward’ fruit promotes fruit expansion through water uptake显示文摘Exogenous application of a cytokinin-like compound forchlorfenuron(CPPU)can promote fruit growth,although often at the expense of dry matter(DM),an important indicator of fruit quality.Actinidia chinensis var.deliciosa‘Hayward’fruit are very responsive to CPPU treatments,but the mechanism underlying the significant fruit weight increase and associated decrease in DM is unclear.In this study,we hypothesised that CPPU-enhanced growth increases fruit carbohydrate demand,but limited carbohydrate supply resulted in decreased fruit DM.During fruit development,CPPU effects on physical parameters,metabolites,osmotic pressure and transcriptional changes were assessed under conditions of both standard and a high carbohydrate supply.We showed that CPPU increased fruit fresh weight but the dramatic DM decrease was not carbohydrate limited.Enhanced glucose and fructose concentrations contributed to an increase in soluble carbohydrate osmotic pressure,which was correlated with increased water accumulation in CPPU-treated fruit and up-regulation of water channel aquaporin gene PIP2.4 at 49 days after anthesis.Transcipt analysis suggested that the molecular mechanism contributing to increased glucose and fructose concentrations was altered by carbohydrate supply.At standard carbohydrate supply,the early glucose increase in CPPU fruit was associated with reduced starch synthesis and increased starch degradation.When carbohydrate supply was high,the early glucose increase in CPPU fruit was associated with a general decrease in starch synthesis but up-regulation of vacuolar invertase and fructokinase genes.We conclude that CPPU affected fruit expansion by increasing the osmotically-driven water uptake and its effect was not carbohydrate supply-limited. | Simona Nardozza Helen L Boldingh Mark W Wohlers Andrew P Gleave Zhiwei Luo Guglielmo Costa Elspeth A MacRae Michael J Clearwater Annette C Richardson | 2017 | Horticulture Research2017，4，1： | 2 |
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