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Li Y, Yin S, Fang J, Hua Y, Wang C, Mu D, Zhou K. Neurodevelopmental delay with critical congenital heart disease is mainly from prenatal injury not infant cardiac surgery: current evidence based on a meta-analysis of functional magnetic resonance imaging. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2015; 45:639-648. [PMID: 24913334 DOI: 10.1002/uog.13436] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2014] [Revised: 05/11/2014] [Accepted: 05/30/2014] [Indexed: 06/03/2023]
Abstract
OBJECTIVE No consensus has been reached regarding whether brain injury related to congenital heart disease (CHD) is caused by infant cardiac surgery and/or prenatal injury resulting from the CHD. We performed this meta-analysis to identify the likely cause of neurodevelopmental delay in CHD patients. METHODS We carried out a literature search without language restriction in December 2013, retrieving records from PubMed, EMBASE, the Cochrane Library and the World Health Organization trials center, to identify studies applying functional magnetic resonance imaging (fMRI) evaluation of brain function before surgery and, in some cases, after surgery (both immediate term and short term postoperatively). The preoperative and postoperative fMRI results were extracted, and meta-analysis was performed using Revman 5.1.1 and STATA 11.0, according to the guidelines from the Cochrane review and MOOSE groups. RESULTS The electronic search yielded 937 citations. Full text was retrieved for 15 articles and eight articles (nine studies) were eligible for inclusion: six studies (n = 312 cases) with fMRI analysis before surgery and three (n = 36 cases) with complete perioperative fMRI analysis. The overall average diffusivity of CHD cases was significantly higher than that of controls, with a summarized standard (std) mean difference of 1.39 (95% CI, 0.70-2.08), and the fractional anisotropy was lower in CHD cases, with a summarized mean difference of -1.43 (95% CI, -1.95 to -0.91). N-acetylaspartate (NAA)/choline (Cho) for the whole brain was significantly lower in CHD cases compared with healthy ones, while lactate/Cho was significantly higher in CHD cases. Immediate term postoperatively, significant changes in NAA/creatine and NAA/Cho, relative to preoperative values, were found. However, the difference did not persist at the short-term follow-up. CONCLUSION This meta-analysis suggests that the delay in neurological development in newborns with CHD is due mainly to prenatal injury, and cardiac surgery might lead to mild brain injuries postoperatively, but fMRI shows recovery within a short period.
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Wang M, Li N, Zhang D, Zu F, Chang G, Zhou K. PP.09.11. J Hypertens 2015. [DOI: 10.1097/01.hjh.0000467988.07243.62] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Zhou K, Sauve L, Richardson S, Ford-Jones EL, Morris S. 127: Enteric Fever in a Multicultural Canadian Tertiary Care Pediatric Setting: A 28 Year Review. Paediatr Child Health 2015. [DOI: 10.1093/pch/20.5.e80] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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O'Neil IA, McConville M, Zhou K, Brooke C, Robertson CM, Berry NG. The synthesis and structure of chiral enamine N-oxides. Chem Commun (Camb) 2015; 50:7336-9. [PMID: 24869947 DOI: 10.1039/c3cc47928e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chiral enamine N-oxides have been synthesised by a diastereoselective intermolecular reverse-Cope cycloaddition reaction between chiral hydroxylamines and activated acetylenes. Their structures have been investigated by NMR, X-ray crystallography and computational methods.
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Mou Y, Li J, Zhou K, Yu R, Xu D, Luo H, Lai D, Zhou L. Enhanced Production of Palmarumycins C12 and C13 in Mycelial Liquid Culture of the Endophytic Fungus <i>Berkleasmium<?i> sp. Dzf12 with <i>In situ</i> Macroporous Resin Adsorption. TROP J PHARM RES 2015. [DOI: 10.4314/tjpr.v14i3.8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Mou Y, Zhou K, Xu D, Yu R, Li J, Yin C, Zhou L. Enhancement of Diosgenin Production in Plantlet and Cell Cultures of Dioscorea zingiberensis by Palmarumycin C 13 from the Endophytic fungus, Berkleasmium sp. Dzf12. TROP J PHARM RES 2015. [DOI: 10.4314/tjpr.v14i2.8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Zhou K, Kong L, Wang Y, Li S, Song L, Wang Z, Wu W, Chen J, Wang Y, Jin Z. Coronary artery fistula in adults: evaluation with dual-source CT coronary angiography. Br J Radiol 2015; 88:20140754. [PMID: 25784320 DOI: 10.1259/bjr.20140754] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE To evaluate the clinical value of dual-source CT (DSCT) coronary angiography in the diagnosis of coronary artery fistula (CAF) in adults. METHODS A large cohort of 17,548 patients, who underwent DSCT coronary angiography in our hospital between January 2008 and October 2013, were retrospectively reviewed for CAF. The origin, course and drainage site of CAF and coexisting abnormalities were analysed. The conventional angiography results, treatments and follow-up DSCT images were also evaluated. RESULTS A total of 33 CAFs from 17,548 patients were detected. The incidence of CAF was 0.19% by DSCT. CAF originating from the left coronary artery (LCA) was found in 14 (42.4%) patients, from right coronary artery (RCA) in 4 (12.1%) cases and from both LCA and RCA in 15 (45.5%) patients. The pulmonary artery was the most common site of drainage (28/33, 84.8%). 8 of the 33 (24.2%) cases were associated with aneurysms. Six cases were associated with coronary artery atherosclerosis. Four patients underwent conventional angiography. CONCLUSION Coronary-pulmonary artery fistula in adults was found more often than in previous studies. CAF commonly originates from LCA or both LCA and RCA in adults. DSCT is a robust tool for investigating the origin, course and drainage site of CAF and coexistent abnormalities. ADVANCES IN KNOWLEDGE A large adult patient cohort who underwent DSCT angiography was reviewed to assess CAFs. Coronary-pulmonary artery fistula in adults was found more often than in previous studies. CAF was observed to originate from the LCA or both coronary arteries in adults. DSCT could clearly depict the fistula origin, course, drainage site and coexisting abnormalities. Conventional angiography results, treatments and follow-up DSCT images were analysed.
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He Z, Zhou K, Xiao M, Wei F. Simulation of Soot Size Distribution in a Counterflow Flame. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2015. [DOI: 10.1515/ijcre-2014-0092] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Soot formed during the rich combustion of fossil fuels is an undesirable pollutant and health hazard. A newly developed Monte Carlo method is used to simulate the soot formation in a counterflow diffusion flame of ethylene. The simulation uses a new reaction mechanism available in literature, which focuses on modeling the formation of large polycyclic aromatic hydrocarbons (PAHs) up to coronene (C24H12). Nascent soot particles are assumed to form from the collision of eight different PAH molecules. Soot surface growth includes the hydrogen-abstraction-C2H2-addition mechanism and the condensation of the PAHs. Soot coagulation is in the free-molecular regime because particles are small (not more than a hundred nanometer). The coupling between vapor consumption and soot formation is handled by an interpolative moment method. Soot particle diffusion is found negligible throughout the counterflow flame, except for a very narrow region right around the stagnation plane. The soot particle size distribution (PSD) generally exhibits a bimodal shape. The first peak corresponds to a large number of nascent particles, while the second peak results from the competition between nucleation and coagulation. Surface growth affects the PSD quantitatively, but does not change the modality. A comparison with experimental data is also provided.
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Nijhuis RHT, Oueslati S, Zhou K, Bosboom RW, Rossen JWA, Naas T. OXY-2-15, a novel variant showing increased ceftazidime hydrolytic activity. J Antimicrob Chemother 2015; 70:1429-33. [DOI: 10.1093/jac/dkv002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Accepted: 12/31/2014] [Indexed: 11/14/2022] Open
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Zhou K, Ferdous M, de Boer RF, Kooistra-Smid AMD, Grundmann H, Friedrich AW, Rossen JWA. The mosaic genome structure and phylogeny of Shiga toxin-producing Escherichia coli O104:H4 is driven by short-term adaptation. Clin Microbiol Infect 2014; 21:468.e7-18. [PMID: 25656624 DOI: 10.1016/j.cmi.2014.12.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 12/17/2014] [Accepted: 12/17/2014] [Indexed: 01/23/2023]
Abstract
Shiga toxin-producing Escherichia coli (STEC) O104:H4 emerged as an important pathogen when it caused a large outbreak in Germany in 2011. Little is known about the evolutionary history and genomic diversity of the bacterium. The current communication describes a comprehensive analysis of STEC O104:H4 genomes from the 2011 outbreak and other non-outbreak-related isolates. Outbreak-related isolates formed a tight cluster that shared a monophyletic relation with two non-outbreak clusters, suggesting that all three clusters originated from a common ancestor. Eight single nucleotide polymorphisms, seven of which were non-synonymous, distinguished outbreak from non-outbreak isolates. Lineage-specific markers indicated that recent partitions were driven by selective pressures associated with niche adaptation. Based on the results, an evolutionary model for STEC O104:H4 is proposed. Our analysis provides the evolutionary context at population level and describes the emergence of clones with novel properties, which is necessary for developing comprehensive approaches to early warning and control.
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Andtbacka R, Curti B, Kaufman H, Daniels G, Nemunaitis J, Spitler L, Hallmeyer S, Lutzky J, Schultz S, Whitman E, Zhou K, Weisberg J, Shafren D. Calm Study: Secondary Endpoints of a Phase Ii Study of a Novel Oncolytic Immunotherapeutic Agent, Coxsackievirus A21, Delivered Intratumorally in Patients with Advanced Malignant Melanoma. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu344.19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Zhu J, Zhu H, Mei Z, Zhang L, Jin C, Ran L, Zhou K, Yang W. High-intensity focused ultrasound ablation: an effective and safe treatment for secondary hypersplenism. Br J Radiol 2014; 87:20140374. [PMID: 25141274 DOI: 10.1259/bjr.20140374] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
OBJECTIVE Hypersplenism is a common disease. The conventional treatment is splenectomy and partial splenic embolization; however, both of them have high complication rates and technical defects. Therefore, safer and more effective techniques should be considered for the treatment of hypersplenism. High-intensity focused ultrasound (HIFU) may provide an effective and safe way for treatment of hypersplenism. Therefore, we conducted this study to assess the safety and efficacy of HIFU in treatment of secondary hypersplenism. METHODS A total of 28 patients who suffered from secondary hypersplenism were treated with HIFU ablation. All patients who underwent HIFU were closely followed-up over a year. MRI scan was performed, and the spleens were observed. Blood counts and liver function tests were also carried out. RESULTS In the follow-up process, the levels of white blood cells and platelets in the blood after HIFU were significantly higher than those before HIFU, liver function also improved after HIFU treatment. In addition, the symptoms were ameliorated significantly or even disappeared. The MRI showed that the ablation area had turned into a non-perfused volume, and after 12 months of HIFU ablation, the ablated area shrank evidently; the sunken spleen formed a lobulated shape and the splenic volume decreased. CONCLUSION HIFU ablation is a safe, effective and non-invasive approach for secondary hypersplenism. ADVANCES IN KNOWLEDGE For the first time we used HIFU ablation to treat secondary hypersplenism. It not only expands indications of HIFU but also provides better choice for the treatment of secondary hypersplenism.
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McConville M, Bradley DF, Zhou K, Schiffrin DJ, O'Neil IA. Selective trioxolane based bifunctional molecular linkers for covalent heme surface functionalisation. Chem Commun (Camb) 2014; 50:186-8. [PMID: 24217350 DOI: 10.1039/c3cc46041j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A bifunctional molecular linker containing both aryl diazonium and trioxolane groups was synthesised and its ability to sequentially functionalise glassy carbon and covalently immobilise heme investigated. Functionalisation was demonstrated by electrochemical techniques.
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Kunheri B, Arjunan A, Krishnan P, Pillai B, Prasad S, Bernier-Chastagner V, Desandes E, Carrie C, Alapetite C, Hankinson T, Jones D, Handler M, Foreman N, Liu A, Smiley NP, Alden T, Hartsell W, Fangusaro J, Hill-Kayser CE, Lustig RA, Minturn JE, Both S, Waanders AJ, Belasco JB, Armstrong C, Phillips PC, Fisher MJ, Hill-Kayser CE, Paltin I, Lustig RA, Fisher MJ, Both S, Belasco JB, Cole KA, Waanders AJ, Phillips PC, Minturn JE, Wells E, Vezina G, Kilburn L, Rood B, Crozier F, Hwang E, Packer R, Janssens GO, van den Bosch S, van Kollenburg PG, Gidding CE, Schieving JH, Kaanders JH, van Lindert EJ, Kramer K, Pandit-Taskar N, Souweidane MM, Wolden S, DeSelm C, Cheung NKV, Lassen-Ramshad Y, Hansen J, Seiersen K, Petersen JBB, Mahajan A, Grosshans D, Ris D, Chintagumpala M, Okcu F, McAleer MF, Moore B, Stancel H, Minard C, Guffey D, Kahalley L, Blomgren K, Zhou K, Xie C, Zhu C, McAleer MF, Zhao Z, Weinberg J, Sandberg D, Hughes D, Mahajan A, Anderson P, Guha-Thakurta N, Muller K, Hoffmann M, Seidel C, Warmuth-Metz M, Pietsch T, Kordes U, Sander A, Rossler J, Graf N, Scheithauer H, Kortmann RD, Kramm CM, von Bueren AO, Gunther J, Sato M, Chintagumpala M, Jo E, Paulino A, Adesina A, Ketonen L, Jones J, Su J, Okcu F, Khatua S, Dauser R, Whitehead W, Weinberg J, Mahajan A, Gandola L, Pecori E, Biassoni V, Chiruzzi C, Schiavello E, Meroni S, Spreafico F, Pignoli E, Massimino M, Jalali R, Krishna U, Gupta T, Goswami S, Deodhar J, Dutta D, Kannan S, Goel A, Sarin R, Sastry J, Ronghe M, Murphy D, Forbes K, Jones R, Cowie F, Brown J, Indelicato D, Goksel EO, Tezcanli E, Bilge H, Yasemin, Yarar Y, Sato M, Gunther J, Mahajan A, Jo E, Paulino A, Adesina A, Jones J, Ketonen L, Su J, Okcu M, Khatua S, Dauser R, Whitehead W, Weinberg J, Chintagumpala M, Paulino A, Jo E, Sato M, Su J, Okcu MF, Mahajan A, Dauser R, Whitehead W, Adesina A, Chintagumpala M, Danielsson A, Tisell M, Rydenhag B, Caren H. RADIATION ONCOLOGY. Neuro Oncol 2014; 16:i117-i122. [PMCID: PMC4046296 DOI: 10.1093/neuonc/nou080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/10/2023] Open
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Min ST, Zhou K, Xue GL. Density functional theory on the pentaatomic planar tetracoordinate carbon molecules CGa3Ge and [CGa3Ge]−. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2014. [DOI: 10.1134/s0036024414050185] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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141
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Zhou K, Zhu XG, Li Y, Liu J. Fabrication of PDMS micro through-holes using micromolding in open capillaries. RSC Adv 2014. [DOI: 10.1039/c4ra02498b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Micromolding in open capillaries, a simpler method for PDMS through-holes fabrication, whose procedures are easy to handle and observe.
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142
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Zhou K, Wang Y, Peng W, Sun J, Qing Y, Mo X. Genetic variants of the endothelial NO synthase gene (eNOS) may confer increased risk of sporadic congenital heart disease. GENETICS AND MOLECULAR RESEARCH 2014; 13:3805-11. [DOI: 10.4238/2014.may.16.4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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143
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Zhou K, Yan Y, Zhao S, Li B. Clinical application and prognostic assessment of serum Tumor Associated Material (TAM) from esophageal cancer patients. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2014; 18:3870-3876. [PMID: 25555878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To explore the correlation between serum levels of Tumor Associated Materials (TAM) and clinicopathological parameters and prognosis in patients with esophageal cancer (EC). PATIENTS AND METHODS The levels of TAM were determined by chemical colorimetry in 100 EC patients and 100 healthy controls. RESULTS Serum TAM levels were significantly higher in patients with esophageal carcinoma than in the control group (p < 0.001). High levels of TAM were associated with tumor size (p = 0.004), tumor depth (p < 0.001), stage (p < 0.001), lymph node metastases (p < 0.001), tumor differentiation (p = 0.001), tumor respectability (p = 0.002) and disease progression (p < 0.001). The poor prognostic outcomes were correlated with an elevated level of TAM (p = 0.001). Kaplan-Meier analysis showed patients with increased levels of TAM after operation had an lower overall survival (p < 0.001) and disease-free survival (p < 0.001). In addition, multivariate Cox proportional hazard analyses revealed that TAM may be an independent factor affecting the overall survival and disease-free survival (p < 0.001). CONCLUSIONS The detection of TAM could be used to screen for tumor and assess unfavorable prognosis in patients with EC.
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Ilakovac V, Guarise M, Grioni M, Schmitt T, Zhou K, Braicovich L, Ghiringhelli G, Strocov VN, Berger H. Opening of a Peierls gap in BaVS3 probed by V L3 edge resonant inelastic x-ray scattering. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2013; 25:505602. [PMID: 24275702 DOI: 10.1088/0953-8984/25/50/505602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
V L3 edge resonant inelastic x-ray scattering measurements performed on high quality BaVS3 single crystals reveal that the intra-t2g dd excitations close to the elastic peak are suppressed below the metal-insulator transition induced by the Peierls instability. The depletion of electronic states close to the Fermi level represents a direct observation of the opening of a charge gap inside the t2g manifold.
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Bathoorn E, Friedrich AW, Zhou K, Arends JP, Borst DM, Grundmann H, Rossen JW. Latent introduction to the Netherlands of multiple antibiotic resistance including NDM-1 after hospitalisation in Egypt, August 2013. ACTA ACUST UNITED AC 2013; 18. [PMID: 24176580 DOI: 10.2807/1560-7917.es2013.18.42.20610] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We describe the introduction of various multi-drug resistant bacterial strains, including an NDM-1-producing Klebsiella pneumoniae, through a traveller returning from Egypt, where they had been admitted to a private hospital. All family members of the patient were colonised with one or more extended-spectrum beta-lactamase producing strains. These findings emphasise the importance of adherence to isolation precautions for returning patients and suggest the need for inclusion of Enterobacteriaceae in admission screening.
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Zhang J, Zhou K, Wang L, Gao M. Extremely low-frequency magnetic fields affect pigment production of Monascus purpureus in liquid-state fermentation. Eur Food Res Technol 2013. [DOI: 10.1007/s00217-013-2096-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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147
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Luo H, Song K, Zhang RH, Zhou K. Pulsed re-sampling of cued object during 'inhibition of return': new behavioral evidence. J Vis 2013. [DOI: 10.1167/13.9.943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Meng Q, Huang Y, Zhou K, Cui D, Ma Y, Chen L. Different neural processing of hole and no-hole stimuli in early stages of cortical and subcortical visual pathway. J Vis 2013. [DOI: 10.1167/13.9.1006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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149
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Chen Y, Xiao Y, Ge W, Zhou K, Wen J, Yan W, Wang Y, Wang B, Qu C, Wu J, Xu L, Cai W. miR-200b inhibits TGF-β1-induced epithelial-mesenchymal transition and promotes growth of intestinal epithelial cells. Cell Death Dis 2013; 4:e541. [PMID: 23492772 PMCID: PMC3613822 DOI: 10.1038/cddis.2013.22] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Inflammatory bowel disease (IBD), which consists of Crohn's disease (CD) and ulcerative colitis (UC), is a chronic, inflammatory disorder of the gastro-intestinal tract with unknown etiology. Current evidence suggests that intestinal epithelial cells (IECs) is prominently linked to the pathogenesis of IBD. Therefore, maintaining the intact of epithelium has potential roles in improving pathophysiology and clinical outcomes of IBD. MicroRNAs (miRNAs) act as post-transcriptional gene regulators and regulate many biological processes, including embryonal development, cell differentiation, apoptosis and proliferation. In this study, we found that miR-200b decreased significantly in inflamed mucosa of IBD, especially for UC, when compared with their adjacent normal tissue. Simultaneously, we also found that the genes of E-cadherin and cyclin D1 were reduced significantly and correlated positively to the miR-200b. In addition, the upregulation of transforming growth factor-beta 1 (TGF-β1) was inversely correlated to the miR-200b in IBD. To investigate the possible roles of miR-200b in IECs maintaining, we used TGF-β1 to induce epithelial-mesenchymal transition (EMT) in IEC-6 initially. After sustained over-expressing miR-200b in IEC-6, the EMT was inhibited significantly that was characterized by downregulation of vimentin and upregulation of E-cadherin. Furthermore, we found that miR-200b enhanced E-cadherin expression through targeting of ZEB1, which encode transcriptional repressors of E-cadherin. SMAD2 was found to act as a target of miR-200b with direct evidence that miR-200b binding to the 3′ UTR of SAMD2 and the ability of miR-200b to repress SMAD2 protein expression. With SMAD2 depletion, the expression of vimentin decreased correspondingly, which suggested miR-200b might reduce vimentin through regulating the SMAD2. With endogenous over-expression of miR-200b, the proliferation of IEC-6 cells increased significantly by increasing S-phase entry and promoting expression of the protein cyclin D1. Summarily, our study suggested a potential role for mir-200b in maintaining intact of intestinal epithelium through inhibiting EMT and promoting proliferation of IECs.
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Ding J, Ji J, Zhu W, Zhou K, Han J, Zhang Y, Yu C, Li T, Tao G, Ji F, Zhou X, Pan P. A retrospective study of different treatments of limited-stage small-cell esophageal carcinoma and associated prognostic factor analysis. Dis Esophagus 2013; 26:696-702. [PMID: 23317069 DOI: 10.1111/dote.12017] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Primary, small-cell esophageal carcinoma (SCEC) is a rare but highly malignant tumor. Due to lack of randomized, controlled, prospective studies, there are currently no unified treatment modalities for SCEC. This study retrospectively analyzed the outcomes of different treatments and prognostic factors that influence overall survival in patients with limited-stage SCEC. The study included 106 patients pathologically diagnosed with limited-stage SCEC at Huai'an First People's Hospital, Nanjing Medical University (Huai'an, China), between 1998 and 2007. There were 66 males and 40 females, with a median age of 58 years (range: 45-77 years). Fourteen patients received surgery alone, 42 received surgery and postoperative chemotherapy, 11 received radiotherapy alone, and 39 received concurrent chemoradiotherapy. Combined modality treatment with and without chemotherapy yielded 5-year survival rates (5YSRs) of 27.2% and 0%, respectively. Associated median survival times were 22 months and 11 months, respectively, with a hazard ratio (HR) of 2.30 (95% confidence interval [CI]: 1.42-3.73, P = 0.001). Among patients treated with surgery plus postoperative chemotherapy or with concurrent chemoradiotherapy, the 5YSRs were 31.0% and 23.1%, respectively. Median survival times were 26 months and 18 months, with an HR of 1.25 (95% CI: 0.75-2.09, P = 0.725). Multivariate survival analysis using Cox regression model showed that chemotherapy was a positive independent prognostic factor for SCEC (HR 2.92, 95% CI: 1.25-6.80). Chemotherapy-based combined modality treatment appears to increase the long-term survival of patients with limited-stage SCEC. Similar overall survival rates results are achieved with surgery combined with chemotherapy as with concurrent chemoradiotherapy, with chemotherapy being an independent prognostic factor. Randomized, controlled, prospective studies are needed to identify optimal chemotherapy regimens for treating SCEC.
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