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Qiu Y, Wang M, Tan T, Yuan X, Ding Y. Effects of n-3 polyunsaturated fatty acids on hepatic tight junction after partial hepatectomy in rats. Transplant Proc 2011; 43:1480-3. [PMID: 21693221 DOI: 10.1016/j.transproceed.2011.02.060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2010] [Revised: 02/01/2011] [Accepted: 02/14/2011] [Indexed: 10/18/2022]
Abstract
OBJECTIVE To explore the effects of n-3 polyunsaturated fatty acid (PUFA) on the hepatic tight junction in rat liver after partial hepatectomy. MATERIALS AND METHODS Male Sprague-Dawley rats were divided into 4 groups: sham operation, 70% hepatectomy, 70% hepatectomy with administration of 1 mL/kg n-3 PUFA, and 70% hepatectomy with administration of 2 mL/kg n-3 PUFA. Morphologic features of the hepatic tight junction were observed at transmission electron microscopy, and expression of the tight junction proteins occludin, claudin-3, and ZO-1 was studied using Western blot analysis. RESULTS The hepatic tight junction structure became loosened 3 days after 70% hepatectomy. The levels of tight junction occludin decreased markedly, whereas claudin-3 and ZO-1 levels increased 2- or 3-fold over control levels. Supplementation of n-3 PUFA alleviated the changes in tight junction structure and occludin expression. CONCLUSION n-3 PUFA has protective effects on hepatic tight junction structure after 70% hepatectomy, which were attributed in part to modulation of occludin expression.
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Sun Z, Cao X, Jiang MM, Qiu Y, Zhou H, Chen L, Qin B, Wu H, Jiang F, Chen J, Liu J, Dai Y, Chen HF, Hu QY, Wu Z, Zeng JZ, Yao XS, Zhang XK. Inhibition of β-catenin signaling by nongenomic action of orphan nuclear receptor Nur77. Oncogene 2011; 31:2653-67. [PMID: 21986938 PMCID: PMC3257393 DOI: 10.1038/onc.2011.448] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Dysregulation of β-catenin turnover due to mutations of its regulatory proteins including adenomatous polyposis coli (APC) and p53 is implicated in the pathogenesis of cancer. Thus, intensive effort is being made to search for alternative approaches to reduce abnormally activated β-catenin in cancer cells. Nur77, an orphan member of the nuclear receptor superfamily, has a role in the growth and apoptosis of cancer cells. Here, we reported that Nur77 could inhibit transcriptional activity of β-catenin by inducing β-catenin degradation via proteasomal degradation pathway that is glycogen synthase kinase 3β and Siah-1 independent. Nur77 induction of β-catenin degradation required both the N-terminal region of Nur77, which was involved in Nur77 ubiquitination, and the C-terminal region, which was responsible for β-catenin binding. Nur77/ΔDBD, a Nur77 mutant lacking its DNA-binding domain, resided in the cytoplasm, interacted with β-catenin, and induced β-catenin degradation, demonstrating that Nur77-mediated β-catenin degradation was independent of its DNA binding and transactivation, and might occur in the cytoplasm. In addition, we reported our identification of two digitalis-like compounds (DLCs), H-9 and ATE-i2-b4, which potently induced Nur77 expression and β-catenin degradation in SW620 colon cancer cells expressing mutant APC protein in vitro and in animals. DLC-induced Nur77 protein was mainly found in the cytoplasm, and inhibition of Nur77 nuclear export by the CRM1-dependent nuclear export inhibitor leptomycin B or Jun N-terminal kinase inhibitor prevented the effect of DLC on inducing β-catenin degradation. Together, our results demonstrate that β-catenin can be degraded by cytoplasmic Nur77 through their interaction and identify H-9 and ATE-i2-b4 as potent activators of the Nur77-mediated pathway for β-catenin degradation.
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Sarte PM, Silverstein HJ, Van Wyk BTK, Gardner JS, Qiu Y, Zhou HD, Wiebe CR. Absence of long-range magnetic ordering in the pyrochlore compound Er2Sn2O7. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2011; 23:382201. [PMID: 21891830 DOI: 10.1088/0953-8984/23/38/382201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The low temperature behaviour of powder Er2Sn2O7 samples has been studied by magnetic susceptibility, heat capacity, and neutron scattering experiments. We report here the absence of magnetic ordering down to 100 mK. Anomalies in the heat capacity can be accounted for through an analysis of the crystal field spectrum observed by inelastic neutron scattering spectroscopy. These new measurements on Er2Sn2O7 suggest a new lower bound for the frustration index of f = |Θ(CW)|/T(N) = 14/0.1 = 140, placing this compound into a highly frustrated regime.
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Fu AZ, Qiu Y, Davies MJ, Radican L, Engel SS. Treatment intensification in patients with type 2 diabetes who failed metformin monotherapy. Diabetes Obes Metab 2011; 13:765-9. [PMID: 21457427 DOI: 10.1111/j.1463-1326.2011.01405.x] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
AIM To evaluate the time to and factors associated with treatment intensification in patients with type 2 diabetes who failed metformin monotherapy. METHODS In a retrospective analysis using a large US electronic medical record database, eligible patients included those with type 2 diabetes and an HbA(1c) of ≥7.0% or at least two fasting blood glucose levels of ≥126 mg/dl while on metformin monotherapy for at least 6 months within the period of 1 January 1997 to 31 December 2008. Time to treatment intensification was calculated as the time between index date (date on which HbA(1c) ≥ 7% after metformin monotherapy for at least 6 months) and first prescription for additional antihyperglycaemic agent during follow-up period. All patients were required to have data for at least 12 months prior to and following the index date. A Cox proportional hazards model was employed to determine patient baseline characteristics associated with time to treatment intensification. RESULTS Of the 12 566 patients identified, mean age at index date was 63 years and 51% were female. Mean index HbA(1c) was 8.0% overall, with 66, 19 and 15% of patients having an index HbA(1c) of 7 to <8%, 8 to <9% and ≥9%, respectively. Median time to treatment intensification was 14.0 months overall and 19.0, 8.7 and 4.5 months for patients with index HbA(1c) of 7 to <8%, 8 to <9% and ≥9%, respectively. Factors associated with treatment intensification included higher index HbA(1c) , younger age, higher Charlson co-morbidity index, metformin daily dose ≥ 1500 mg and later index date (all p < 0.05). CONCLUSIONS In US clinical practice, median time to receive additional antihyperglycaemic medication is more than 1 year for patients with type 2 diabetes who failed metformin monotherapy.
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Ghosh S, Zhou HD, Balicas L, Hill S, Gardner JS, Qiu Y, Wiebe CR. Short range ordering in the modified honeycomb lattice compound SrHo(2)O(4). JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2011; 23:164203. [PMID: 21471622 DOI: 10.1088/0953-8984/23/16/164203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The low temperature behaviour of single crystalline SrHo(2)O(4) has been characterized by dc magnetic susceptibility, heat capacity, and neutron scattering experiments. Our results show that despite the lack of magnetic long-ranged ordering in the presence of strong antiferromagnetic correlations, SrHo(2)O(4) does not order down to 1.8 K. Elastic neutron scattering experiments show prominent magnetic diffuse scattering correlated with a broad feature in the dc susceptibility at T = 4 K, indicative of magnetic short-ranged ordering of the Ho(3) spins. Inelastic neutron scattering shows the presence of five crystal field levels up to 80 K in energy, in agreement with the integration of the magnetic specific heat component yielding Rln5 entropy release. The magnetic short-ranged ordering is fitted to a nearest neighbour interaction model with good agreement.
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Zhou HD, Choi ES, Li G, Balicas L, Wiebe CR, Qiu Y, Copley JRD, Gardner JS. Spin liquid state in the S = 1/2 triangular lattice Ba3CuSb2O9. PHYSICAL REVIEW LETTERS 2011; 106:147204. [PMID: 21561219 DOI: 10.1103/physrevlett.106.147204] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Indexed: 05/30/2023]
Abstract
The synthesis and characterization of Ba3CuSb2O9, which has a layered array of Cu2+ spins in a triangular lattice, are reported. The magnetic susceptibility and neutron scattering experiments of this material show no magnetic ordering down to 0.2 K with a θ(CW) = -55 K. The magnetic specific heat reveals a T-linear dependence with a γ = 43.4 mJ K(-2) mol(-1) below 1.4 K. These observations suggest that Ba3CuSb2O9 is a new quantum spin liquid candidate with a S = 1/2 triangular lattice.
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Zhu M, Li Y, Xia Q, Wang S, Qiu Y, Che M, Dai H, Qian J, Ni Z, Axelsson J, Yan Y. Strong impact of acute kidney injury on survival after liver transplantation. Transplant Proc 2011; 42:3634-8. [PMID: 21094830 DOI: 10.1016/j.transproceed.2010.08.059] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2009] [Revised: 06/03/2010] [Accepted: 08/26/2010] [Indexed: 01/17/2023]
Abstract
Acute kidney injury (AKI) is a major complication in orthotopic liver transplantation (OLT). In an evaluation of Acute Kidney Injury Network (AKIN) criteria in liver transplanted patients, we retrospectively analyzed the usefulness of these criteria to predict survival of 193 consecutive patients at a single center who underwent primary OLT for clinical parameters and peak AKI. Postoperative AKI according to AKIN occurred in 60.1% of the patients, namely, stages 1, 2, and 3 in 30%, 13% and 17.1% respectively. Using multivariate logistic regression, AKIN stage 1 and 2 AKI were independently associated with the pre-OLT Model for End-Stage Liver Disease (MELD) score and age, while stage 3 AKI was independently associated with MELD and Acute Physiology and Chronic Health Evaluation (APACHE) II scores. The 28-day and 1-year mortality post-OLT of AKI patients were 15.5% and 25.9% respectively compared with 0% and 3.9% among non-AKI patients (P < .05 for both). The survival rates of non-AKI and stages 1, 2, and 3 AKI subjects were 96%, 85.5%, 84%, and 45.3%, respectively. Cox regression analysis showed independent risk factors for mortality during the first year after transplantation to include post-OLT AKI (12.1; P < .05), post-OLT infection (HR 4.7; P < .01), pre-OLT hypertension (HR 4.4; P < .01) hazard ratio [HR] and post-OLT APACHE II ≥10 (HR 3.6; P < .05). We concluded that AKI as defined by the AKIN criteria is a major complication of OLT linked to a poor outcomes. It remains to be evaluated whether aggressive perioperative therapy to prevent AKI can improve survival among OLT patients.
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Qiu Y, Popescu IA, Duzenli C, Moiseenko V. Mega-voltage versus kilo-voltage cone beam CT used in image guided radiation therapy: comparative study of microdosimetric properties. RADIATION PROTECTION DOSIMETRY 2011; 143:477-480. [PMID: 21148588 DOI: 10.1093/rpd/ncq482] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Mega-voltage computed tomography (MVCT) and kilo-voltage cone beam CT (CBCT) are routinely used in image-guided radiation therapy. In current practice, doses from MVCT and CBCT are reported with no correction for radiation quality. In this study, we compared microdosimetric properties as well as doses for MVCT and CBCT. Monte Carlo simulation codes BEAMnrc and DOSXYZnrc were used to simulate a Varian CBCT 125 kVp photon beam and primary electron spectra for CT sets of two patients. The revised Oak Ridge Electron transport Code (NOREC) was used to simulate electron tracks in liquid water. C++ code was developed to compute lineal energy in a sphere of 1 μm diameter. Dose-mean lineal energy-based quality factors were calculated for critical organs in-field. The estimated quality factor for CBCT is up to a factor of 1.3 times that of MV beams.
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Zheng B, Qiu Y, Jin H, Wang L, Chen X, Shi C, Zhao S. A predictive value of hyponatremia for poor outcome and cerebral infarction in high-grade aneurysmal subarachnoid haemorrhage patients. J Neurol Neurosurg Psychiatry 2011; 82:213-7. [PMID: 20667862 DOI: 10.1136/jnnp.2009.180349] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND The clinical significance of hyponatremia has not been investigated in high-grade aneurysmal subarachnoid haemorrhage (aSAH) patients. Thus, we assessed the predictive value of hyponatremia for poor outcome or cerebral infarction in high grade patients (the World Federation of Neurological Surgeons Scale (WFNS) grade 4 or 5) after aSAH. METHODS Patients with WFNS grade 4 or 5 after aSAH were selected into this study between January 2005 and January 2008. In the same period, patients with WFNS grade 1, 2 or 3 after aSAH (low grade) were also chosen into this study. Hyponatremia was determined with serum sodium measurements obtained within 9 days after aSAH. Prognosis of patients was estimated with Glasgow Outcome Scale at 3 months. The relationship between hyponatremia and poor outcome and association of hyponatremia and cerebral infarction were analysed, respectively. RESULTS A total of 124 high-grade patients were included in this study. Of those, 78 patients developed hyponatremia. Hyponatremia developed in 32.3% of cases between days 1 and 3 after aSAH, and 30.6% developed hyponatremia after 3 days post-aSAH. Multivariable analysis revealed that hyponatremia was not correlated with poor outcome in high-grade aSAH patients. Furthermore, only late-onset hyponatremia was correlated with cerebral infarction in these patients. Meanwhile, there was no significant correlation between hyponatremia and poor outcome or cerebral infarction in 259 low-grade aSAH patients. CONCLUSIONS Hyponatremia does not predict poor outcome in all-grade aSAH patients. However, late-onset hyponatremia in high-grade aSAH patients is associated with cerebral infarction. Therefore, the appropriate management of hyponatremia could be beneficial in those patients.
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Vaknin D, Garlea VO, Demmel F, Mamontov E, Nojiri H, Martin C, Chiorescu I, Qiu Y, Kögerler P, Fielden J, Engelhardt L, Rainey C, Luban M. Level crossings and zero-field splitting in the {Cr8}-cubane spin cluster studied using inelastic neutron scattering and magnetization. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:466001. [PMID: 21403379 DOI: 10.1088/0953-8984/22/46/466001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Inelastic neutron scattering (INS) in variable magnetic field and high-field magnetization measurements in the millikelvin temperature range were performed to gain insight into the low-energy magnetic excitation spectrum and the field-induced level crossings in the molecular spin cluster {Cr(8)}-cubane. These complementary techniques provide consistent estimates of the lowest level-crossing field. The overall features of the experimental data are explained using an isotropic Heisenberg model, based on three distinct exchange interactions linking the eight Cr(III) paramagnetic centers (spins s = 3/2), that is supplemented with a relatively large molecular magnetic anisotropy term for the lowest S = 1 multiplet. It is noted that the existence of the anisotropy is clearly evident from the magnetic field dependence of the excitations in the INS measurements, while the magnetization measurements are not sensitive to its effects.
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Han L, Qiu Y, Xie C, Zhang J, Lv X, Xiong W, Wang W, Zhang X, Wu P. Atypical teratoid/rhabdoid tumors in adult patients: CT and MR imaging features. AJNR Am J Neuroradiol 2010; 32:103-8. [PMID: 21051520 DOI: 10.3174/ajnr.a2361] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Primary AT/RT is a rare highly malignant tumor of the CNS, usually occurring in children younger than 5 years of age. The objective of this study was to characterize the CT and MR imaging findings in a series of 5 adult patients with pathologically proved AT/RT. All 5 AT/RTs were supratentorial. In 2 patients who underwent nonenhanced CT, the tumors appeared isoattenuated, and 1 of the 2 tumors contained calcifications. Solid portions of the tumors on MR imaging were isointense on T1-weighted, T2-weighted, and FLAIR images, and 1 case showed restricted diffusion on DWI. The tumors also demonstrated a bandlike rim of strong enhancement surrounding a central cystic area on contrast-enhanced T1-weighted imaging. One tumor was associated with destruction of the calvaria. Although AT/RTs can have nonspecific findings, the tumors in our series were large and isointense on T1-weighted, T2-weighted, and FLAIR images with central necrosis and prominent rim enhancement.
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Tassel C, Kang J, Lee C, Hernandez O, Qiu Y, Paulus W, Collet E, Lake B, Guidi T, Whangbo MH, Ritter C, Kageyama H, Lee SH. Ferromagnetically coupled Shastry-Sutherland quantum spin singlets in (CuCl)LaNb₂O₇. PHYSICAL REVIEW LETTERS 2010; 105:167205. [PMID: 21231006 DOI: 10.1103/physrevlett.105.167205] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2010] [Revised: 07/29/2010] [Indexed: 05/30/2023]
Abstract
A thorough crystal structure determination at very low temperature of (CuCl)LaNb₂O₇, originally proposed as a spin-1/2 square-lattice antiferromagnet, is reported thanks to the use of single-crystal x-ray diffraction and powder neutron diffraction. State-of-the-art calculations (maximum entropy method) reveal that (CuCl)LaNb₂O₇ is orthorhombic with Pbam symmetry. First-principles calculations demonstrate that the dominant magnetic interactions are antiferromagnetic between fourth nearest neighbors with a Cu-Cl-Cl-Cu exchange path, which lead to the formation of spin singlets. The two strongest interactions between the singlets are ferromagnetic, which makes (CuCl)LaNb₂O₇ the first system of ferromagnetically coupled Shastry-Sutherland quantum spin singlets.
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Qiu Y, Liu Y, Qi Z, Wang W, Kou Z, Zhang Q, Liu G, Liu T, Yang Y, Yang X, Xin Y, Li C, Cui B, Huang S, Liu H, Zeng L, Wang Z, Yang R, Wang H, Wang X. Comparison of Immunological Responses of Plague Vaccines F1 + rV270 and EV76 in Chinese-Origin Rhesus Macaque, Macaca mulatta. Scand J Immunol 2010; 72:425-33. [DOI: 10.1111/j.1365-3083.2010.02456.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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264
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Liu L, Guo H, Lv H, Xin Y, Qiu Y, Pen F, Yang B. e0363 Left anterior descending artery dissection and acute myocardial infarction after blunt chest trauma: Two case report. BRITISH HEART JOURNAL 2010. [DOI: 10.1136/hrt.2010.208967.363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Liu L, Guo H, Lv H, Xin Y, Qiu Y, Pen F, Yang B. e0715 Left anterior descending artery dissection and acute myocardial infarction after blunt chest trauma: two case report. BRITISH HEART JOURNAL 2010. [DOI: 10.1136/hrt.2010.208967.715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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266
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Qiu Y. P14-17 Subjective and objective assessment for evaluation of placebo effects on anticipation of pain and pain. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60775-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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267
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Chen L, Quan S, Li H, Chen S, Luo C, Qiu Y. Recurrent miscarriage associated with antiphospholipid antibodies: assessment of endometrial and subendometrial characteristics by three-dimensional ultrasonography and power doppler angiography. Fertil Steril 2010. [DOI: 10.1016/j.fertnstert.2010.07.182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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268
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Liu TJ, Hu J, Qian B, Fobes D, Mao ZQ, Bao W, Reehuis M, Kimber SAJ, Prokes K, Matas S, Argyriou DN, Hiess A, Rotaru A, Pham H, Spinu L, Qiu Y, Thampy V, Savici AT, Rodriguez JA, Broholm C. From (pi,0) magnetic order to superconductivity with (pi,pi) magnetic resonance in Fe(1.02)Te(1-x)Se(x). NATURE MATERIALS 2010; 9:716-20. [PMID: 20639892 DOI: 10.1038/nmat2800] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2010] [Accepted: 06/08/2010] [Indexed: 05/25/2023]
Abstract
The iron chalcogenide Fe(1+y)(Te(1-x)Se(x)) is structurally the simplest of the Fe-based superconductors. Although the Fermi surface is similar to iron pnictides, the parent compound Fe(1+y)Te exhibits antiferromagnetic order with an in-plane magnetic wave vector (pi,0) (ref. 6). This contrasts the pnictide parent compounds where the magnetic order has an in-plane magnetic wave vector (pi,pi) that connects hole and electron parts of the Fermi surface. Despite these differences, both the pnictide and chalcogenide Fe superconductors exhibit a superconducting spin resonance around (pi,pi) (refs 9, 10, 11). A central question in this burgeoning field is therefore how (pi,pi) superconductivity can emerge from a (pi,0) magnetic instability. Here, we report that the magnetic soft mode evolving from the (pi,0)-type magnetic long-range order is associated with weak charge carrier localization. Bulk superconductivity occurs as magnetic correlations at (pi,0) are suppressed and the mode at (pi, pi) becomes dominant for x>0.29. Our results suggest a common magnetic origin for superconductivity in iron chalcogenide and pnictide superconductors.
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Walther T, Qiu Y, Cullis AG. Measuring the contrast in annular dark field STEM images as a function of camera length. ACTA ACUST UNITED AC 2010. [DOI: 10.1088/1742-6596/241/1/012068] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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270
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Fu AZ, Qiu Y, Radican L, Yin DD, Mavros P. Impact of concurrent macrovascular co-morbidities on healthcare utilization in patients with type 2 diabetes in Europe: a matched study. Diabetes Obes Metab 2010; 12:631-7. [PMID: 20590738 DOI: 10.1111/j.1463-1326.2010.01200.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIM To examine and to quantify the impact of concurrent macrovascular co-morbidities (MVC) on healthcare resource utilization among patients with type 2 diabetes mellitus (T2DM) in Europe. METHODS This is a matched cohort study based on the Real-Life Effectiveness and Care Patterns of Diabetes Management study, a multicentre, observational study with retrospective medical chart reviews of T2DM patients in Spain, France, UK, Norway, Finland, Germany and Poland. Included patients were aged > or =30 years at time of diagnosis of T2DM who added a sulfonylurea or a PPARgamma agonist to failing metformin monotherapy (index date) and had concurrent MVC (cases). A control cohort with T2DM but without concurrent MVC was identified using 1:1 propensity score matching. Logit models were used to identify the relationship between concurrent MVC and the likelihood of emergency room admission, receiving medical/surgical procedures, and hospitalization during the study period after controlling for baseline demographics, clinical information and baseline treatment. Negative binomial models were used to predict the number of office visits and length of hospital stay per year attributable to the concurrent MVC. RESULTS Relative to controls, patients with MVC were significantly more likely to have emergency department admissions [odds ratio (OR) 2.69; 95% CI: 1.56-4.65], receiving medical/surgical procedures (OR 2.57; 95% CI: 1.56-4.21) and hospitalizations (OR 2.58; 95% CI: 1.64-4.07) after controlling for other predictors. Similarly, MVC were associated with 1.49 additional office visits per year (p = 0.036) and 0.32 days of hospital stay per year (p = 0.023). CONCLUSIONS Within a seven-country European sample, this study showed that T2DM patients with MVC were more likely to use healthcare resources compared with T2DM patients without MVC.
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Qiu Y, Bachand F, Moiseenko V, Lim P, Aquino-Parsons C, Duzenli C. Poster - Thur Eve - 26: Cinical Implimentation of kV CBCT for Gynecological IMRT. Med Phys 2010. [DOI: 10.1118/1.3476131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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272
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Qiu Y, Moiseenko V, Popescu IA, Duzenli C. TH-C-201B-05: Equivalent Doses and Secondary Malignancy Risk Estimates for Gynecological Patients Undergoing CBCT and IMRT. Med Phys 2010. [DOI: 10.1118/1.3469522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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273
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Qiu Y, Zhu X, Wang W, Xu Q, Ding Y. Nutrition support with glutamine dipeptide in patients undergoing liver transplantation. Transplant Proc 2010; 41:4232-7. [PMID: 20005375 DOI: 10.1016/j.transproceed.2009.08.076] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2008] [Revised: 03/30/2009] [Accepted: 08/04/2009] [Indexed: 11/19/2022]
Abstract
AIM The effect of total parenteral nutrition (TPN) support supplemented with alanyl-glutamine (Ala-Gln) dipeptide was investigated in a randomized, controlled clinical trial. METHODS Sixty-five patients with the diagnosis of end-stage liver disease or hepatic cellular carcinoma admitted for orthotopic liver transplantation were randomly divided into 3 groups: diet group (n = 21), TPN group (n = 22), and Gln group (n = 22). Patients in the TPN and Gln groups received isocaloric and isonitrogenous TPN for 7 days. Venous heparin blood samples were obtained for assay on days 2 and 9 after surgery; we performed routine pathologic tests. RESULTS Compared with the results on day 9 in the TPN group, there was a significant increase in the prognostic nutrition index and in prealbumin among the Gln group. Aspartate aminotransferase improved significantly by Gln treatment compared with traditional TPN support (P < .05). The pathologic results also showed Gln supplementation to reduce hepatic cell injury. A significant decrease in postoperative hospital stay was observed in the Gln group. CONCLUSIONS Posttransplant TPN support greatly improved protein metabolism and nutritional state of patients. TPN with Ala-Gln helped to improve synthetic function and to reduce the injury to a transplanted liver.
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Helton JS, Matan K, Shores MP, Nytko EA, Bartlett BM, Qiu Y, Nocera DG, Lee YS. Dynamic scaling in the susceptibility of the spin-1/2 kagome lattice antiferromagnet herbertsmithite. PHYSICAL REVIEW LETTERS 2010; 104:147201. [PMID: 20481955 DOI: 10.1103/physrevlett.104.147201] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2010] [Revised: 03/11/2010] [Indexed: 05/29/2023]
Abstract
The spin-1/2 kagome lattice antiferromagnet herbertsmithite, ZnCu(3)(OH)(6)Cl(2), is a candidate material for a quantum spin liquid ground state. We show that the magnetic response of this material displays an unusual scaling relation in both the bulk ac susceptibility and the low energy dynamic susceptibility as measured by inelastic neutron scattering. The quantity chiT(alpha) with alpha approximately 0.66 can be expressed as a universal function of H/T or omega/T. This scaling is discussed in relation to similar behavior seen in systems influenced by disorder or by the proximity to a quantum critical point.
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Liu Q, Basu S, Qiu Y, Tang F, Dong F. A role of Miz-1 in Gfi-1-mediated transcriptional repression of CDKN1A. Oncogene 2010; 29:2843-52. [PMID: 20190815 PMCID: PMC2869400 DOI: 10.1038/onc.2010.48] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Zinc-finger (ZF) transcriptional repressor Gfi-1 plays an important role in hematopoiesis and inner ear development, and also functions as an oncoprotein that cooperates with c-Myc in lymphomagenesis. Gfi-1 represses transcription by directly binding to conserved sequences in the promoters of its target genes. CDKN1A encoding p21Cip1 has been identified as a Gfi-1 target gene and shown to contain Gfi-1 binding sites in the upstream promoter region. We show here that Gfi-1 represses CDKN1A in a manner that is independent of its DNA binding activity. Gfi-1 interacts with POZ-ZF transcription factor Miz-1, originally shown to be a c-Myc interacting partner, and via Miz-1 binds to CDKN1A core promoter. Interestingly, Gfi-1 and c-Myc, through Miz-1, form a ternary complex on the CDKN1A promoter, and act in collaboration to repress CDKN1A. Gfi-1 knockdown results in enhanced levels of p21Cip1 and attenuated cell proliferation. Notably, similar to c-Myc, the expression of Gfi-1 is downregulated by TGFβ and the level of Gfi-1 influences the response of cell to the cytostatic effect of TGFβ. Our data reveal an important mechanism by which Gfi-1 regulates cell proliferation and may also have implications for understanding the role of Gfi-1 in lymphomagenesis.
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