4576
|
Salamone SJ, Zhang H, Harney RL, Lundell GD, Cline DJ, Raiz H, Li Y, Courtney JB. Quantification of docetaxel plasma concentrations using a novel nanoparticle-based immunoassay. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e11545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
4577
|
Shroff RT, Javle MM, Li D, Wolff RA, Mauro DJ, Naumov G, Nebozhyn M, Zhang T, Li Y, Sathyanarayanan S. Comprehensive analysis of potential predictive biomarkers for insulin-like growth factor type-1 receptor (IGF-1R) targeted therapy in pancreatic cancer. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.4052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
4578
|
Li Y, Yang X, Yang G, Zhou Y, Yonrmura Y. An evaluation of cytoreductive surgery plus hyperthermic intraperitoneal chemotherapy on patients with peritoneal carcinomatosis: Final results of a phase II prospective and randomized clinical trial. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.4051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
4579
|
Korpanty G, Timms K, Abkevich V, Carey M, Gutin A, Li Y, Li J, Markman M, Broaddus R, Lanchbury JS, Lu KH, Mills GB, Hennessy B. Loss of heterozygosity (LOH) as a measure of whole-genome instability in ovarian cancer correlates with clinical outcomes. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.5027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
4580
|
Gong J, Zhang X, Shen L, Li J, Li Y, Li J, Zhang X, Zhou J, Dong K. Paclitaxel and cisplatin in patients with advanced squamous cell carcinoma of the esophagus. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e14568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
4581
|
Huang M, Luo D, Zhang X, Yu M, Zou B, Li Y, Long J, Wang J, Peng F, Xu Y, Li L, Ren L, Hou M, Lu Y. The effect of erlotinib after gefitinib failure in advanced non-small cell lung cancer (NSCLC) patients with poor performance status (PS): A matched-pair case-control study. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e18057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
4582
|
Cline DJ, Lundell GD, Harney RL, Zhang H, Raiz H, Li Y, Courtney JB, Bertino JR, Salamone SJ. A novel immunoassay to quantify paclitaxel in plasma using monoclonal antibody–coated nanoparticles. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e11544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
4583
|
Yang P, Li Y, Sun Z, Cunningham JM, Aubry M, Wampfler JA, Croghan G, Johnson C, Wu D, Aakre J, Molina JR, Wang L, Pankratz VS. Genetic variations in multiple drug action pathways and survival in advanced-stage non-small cell lung cancer treated with chemotherapy. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.7009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
4584
|
Mu XF, Jin XL, Farnham MMJ, Li Y, O'Neill C. DNA damage-sensing kinases mediate the mouse 2-cell embryo's response to genotoxic stress. Biol Reprod 2011; 85:524-35. [PMID: 21593482 DOI: 10.1095/biolreprod.110.089334] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
A critical function of cells is the maintenance of their genomic integrity. A family of phosphoinositide-3-kinase-related protein kinases, which includes ataxia telangiectasia mutated (ATM) and ataxia telangiectasia and Rad3 related (ATR) kinases, play key roles in sensing DNA damage. ATM and ATR were demonstrated in the cleavage stages of mouse embryo development. Genotoxic stress was imposed by exposure to ultraviolet (UV) radiation (causes DNA strand breaks) or cisplatin (causes strand cross-links). UV irradiation or cisplatin treatment of 2-cell embryos in the G(2) phase of the cell cycle caused DNA damage as defined by increased phosphorylation of the H2A histone family, member X (H2AFX; previously H2AX) variant. UV irradiation caused a stable G(2)-M arrest, and cisplatin treatment allowed progression through mitosis followed by activation of a G(1)-S checkpoint. Both checkpoints were transformation-related protein 53-independent. Caffeine (inhibits both ATM and ATR), but not KU55933 (ATM-selective inhibitor), reversed the G(2)-M block induced by UV, inferring a primary role for ATR in sensing this form of DNA damage. Caffeine and KU55933 were equally effective in reversing the cisplatin-induced G(1)-S block, implicating ATM as the primary sensing enzyme. Breaching of either checkpoint by treatment with caffeine or KU55933 allowed embryos to progress through several further cell cycles, yet none developed to blastocysts. The results show, to our knowledge for the first time, that the G(2)-M and G(1)-S cell-cycle checkpoints in the early embryo are differentially regulated by ATM and ATR in response to genotoxic stress and that they act as an initial point for containment of genomic damage. Under conditions of extensive or persistent DNA damage, the demise of the embryo is the ultimate method of protecting genomic integrity.
Collapse
|
4585
|
Luo L, Ye Y, Liu Z, Zuo L, Li Y, Han Y, Qiu Z, Li L, Zeng Y, Li TS. Assessment of cardiac diastolic dysfunction in HIV-infected people without cardiovascular symptoms in China. Int J STD AIDS 2011; 21:814-8. [PMID: 21297089 DOI: 10.1258/ijsa.2010.010168] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This study assessed cardiac diastolic dysfunction (DD) in HIV-infected subjects without cardiovascular symptoms in China. Eighty-four HIV-infected patients without cardiovascular symptoms were recruited and compared with 30 HIV-negative control subjects. Cardiac DD was evaluated using echocardiography including tissue Doppler imaging. DD was detected in 47.6% of AIDS patients and 42.8% of HIV-positive patients, which was significantly higher than in HIV-negative controls. After logistic regression analysis, HIV infection was independently correlated with cardiac DD (P < 0.05). Among HIV-positive subjects, logistic regression analysis showed that zidovudine exposure was associated with higher prevalence of DD (P < 0.05). Asymptomatic cardiac DD was observed frequently in HIV-infected subjects. HIV infection itself and zidovudine exposure were correlated with a higher prevalence of cardiac DD.
Collapse
|
4586
|
Li Y, Zhao C, Ren Q. Thermodynamic Simulation of CO2 Capture for an IGCC Power Plant using the Calcium Looping Cycle. Chem Eng Technol 2011. [DOI: 10.1002/ceat.201000384] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
4587
|
Pier DB, Levine D, Kataoka ML, Estroff JA, Werdich XQ, Ware J, Beeghly M, Poussaint TY, DuPlessis A A, Li Y, Feldman HA. Magnetic resonance volumetric assessments of brains in fetuses with ventriculomegaly correlated to outcomes. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2011; 30:595-603. [PMID: 21527607 PMCID: PMC3683412 DOI: 10.7863/jum.2011.30.5.595] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
OBJECTIVES The purpose of this study was to correlate 2-dimensional magnetic resonance (MR) measurements of lateral ventricular width and 3-dimensional measurements of lateral ventricular and supratentorial parenchymal volumes to postnatal outcomes in fetuses with ventriculomegaly. METHODS A total of 307 fetuses (mean gestational age, 26.0 weeks; range, 15.7-39.4 weeks) had MR volumetry after referral for ventriculomegaly. Fetuses were grouped into those with (n = 114) and without (n = 193) other central nervous system (CNS) anomalies. Pregnancy and postnatal neurodevelopmental outcomes up to 3 years of age were obtained. A subgroup analysis was performed excluding fetuses with other CNS anomalies. Logistic regression analysis was performed to assess which measurement was most predictive of outcomes. RESULTS There were 50 terminations, 2 stillbirths, and 255 live births. Seventy-five cases were lost to follow-up. Among 180 live-born neonates with follow-up, 140 had abnormal and 40 had normal outcomes. Atrial diameter (P < .0001), frontal horn diameter (P < .0001), and ventricular volume (P = .04) were predictive of live birth, with 92% specificity at 60% sensitivity. Among fetuses without other CNS anomalies, 180 of 193 pregnancies (93%) resulted in live deliveries, with atrial diameter (P < .0001), frontal horn diameter (P = .003), and ventricular volume (P = .008) associated with live birth and atrial diameter having the highest specificity (>99% at 60% sensitivity). Parenchymal volume was not associated with normal or abnormal outcomes (either live birth versus death or normal versus abnormal neurodevelopmental outcome). Among live-born neonates, no age-adjusted threshold for any of the measurements reliably distinguished between normal and abnormal neurodevelopmental outcomes. CONCLUSIONS Ventricular volume and diameter, but not parenchymal volume, correlate with live birth in fetuses with ventriculomegaly. However, once live born, neither 2- nor 3-dimensional measurements can distinguish a fetus that will have a normal outcome.
Collapse
|
4588
|
Geng S, Du X, Weng J, Li Y, Huang X, Li Y, Lai P. 196 Analysis of the T-cell receptor Vδ and Vγ repertoire in the study of immunological abnormalities in myelodysplastic syndromes. Leuk Res 2011. [DOI: 10.1016/s0145-2126(11)70198-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
4589
|
Liu Y, Huang X, Li Y, Li C, Hu X, Xue C, Meng F, Zhou P. Ursolic acid promotes robust tolerance to cardiac allografts in mice. Clin Exp Immunol 2011; 164:282-8. [PMID: 21391985 PMCID: PMC3087921 DOI: 10.1111/j.1365-2249.2011.04333.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/13/2011] [Indexed: 12/13/2022] Open
Abstract
Nuclear factor (NF)-κB is an important molecule in T cell activation. Our previous work has found that T cell-restricted NF-κB super-repressor (IκBαΔN-Tg) mice, expressing an inhibitor of NF-κB restricted to the T cell compartment, can permanently accept fully allogeneic cardiac grafts and secondary donor skin grafts. In this study, we explore if transient NF-κB inhibition by a small molecular inhibitor could induce permanent graft survival. Ursolic acid, a small molecular compound, dose-dependently inhibited T cell receptor (TCR)-triggered NF-κB nuclear translocation and T cell activation in vitro. In vivo, ursolic acid monotherapy prolonged significantly the survival of cardiac allograft in mice. Assisted with donor-specific transfusion (DST) on day 0, ursolic acid promoted 84·6% of first cardiac grafts to survive for more than 150 days. While the mice with long-term surviving grafts (LTS) did not reject the second donor strain hearts for more than 100 days without any treatment, they all promptly rejected the third-party strain hearts within 14 days. Interestingly, this protocol did not result in an increased proportion of CD4(+) CD25(+) forkhead box P3(+) regulatory T cells in splenocytes. That adoptive transfer experiments also did not support regulation was the main mechanism in this model. Splenocytes from LTS showed reduced alloreactivity to donor antigen. However, depletion of CD4(+) CD25(+) regulatory T cells did not alter the donor-reactivity of LTS splenocytes. These data suggest that depletion of donor-reactive T cells may play an important role in this protocol.
Collapse
|
4590
|
Li Y, Yang Z. Quantifying the sustainability of water use systems: Calculating the balance between network efficiency and resilience. Ecol Modell 2011. [DOI: 10.1016/j.ecolmodel.2011.03.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
4591
|
Wang Y, Du X, Geng S, Weng J, Lu Z, Zhong L, Deng C, Lai P, Li Y, Huang X. 237 Detection and analysis of the DNA methylation in patients with myelodysplastic syndrome. Leuk Res 2011. [DOI: 10.1016/s0145-2126(11)70239-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
4592
|
Wang Y, Xu N, Luo Q, Li Y, Sun L, Wang H, Xu K, Wang B, Zhen Y. In vivo assessment of chitosan/β-glycerophosphate as a new liquid embolic agent. Interv Neuroradiol 2011; 17:87-92. [PMID: 21561564 DOI: 10.1177/159101991101700114] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2010] [Accepted: 01/13/2011] [Indexed: 11/15/2022] Open
Abstract
We sought to assess the feasibility of using thermosensitive chitosan/β-glycerophosphate forembolotherapy. The renal arteries in nine rabbits were embolized with chitosan/β-glycero-phosphate. The animals were studied angiographically and sacrificed at one week (n = 3), four weeks (n = 3), and eight weeks (n = 3) after embolotherapy. Histology was obtained at these three time points. Delivery of chitosan/β-glycerophosphate was successful in all cases. Complete occlusion was achieved in all cases. No recanalization was observed in the follow-up angiograms. No untoward inflammatory reactions were observed in the target renal arteries and infarcted kidneys during the histological examinations. Our preliminary feasibility evaluation in rabbit renal arteries indicates that C/GP is a satisfactory embolization agent.
Collapse
|
4593
|
Li Y, Ye D. Cancer therapy by targeting hypoxia-inducible factor-1. Curr Cancer Drug Targets 2011; 10:782-96. [PMID: 20578983 DOI: 10.2174/156800910793605857] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2010] [Accepted: 05/18/2010] [Indexed: 11/22/2022]
Abstract
Tumors are invariably less well-oxygenated than the normal tissues from which they arose. Hypoxia-inducible factor-1 (HIF-1), a key transcriptional regulator, plays a central role in the adaptation of tumor cells to hypoxia by activating the transcription of genes, which regulate several biological processes including angiogenesis, cell proliferation, survival, glucose metabolism and migration. The expression, activity and stability of HIF-1 is not only induced in response to reduced oxygen availability but also modulated through PI-3K, MAPK, autocrine signaling pathways, E3 ubiquitin ligases, and other regulators. The regulators and effects of HIF-1 in cancer have intensively provided us a new clue for the HIF-1 targeting anticancer therapy. This review evaluates the HIF-1 structure, the regulation mechanisms, the functions in cancer and corresponding anticancer strategies.
Collapse
|
4594
|
Li Y, Mederacke I, Scheumann G, Baraki H, Wedemeyer H, Kutschka I. Simultaneous Mitral Valve Replacement and Liver Transplantation. Thorac Cardiovasc Surg 2011; 59:506-8. [DOI: 10.1055/s-0030-1270997] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
4595
|
Li Y, Nishino N. Monitoring the bacterial community of maize silage stored in a bunker silo inoculated with Enterococcus faecium, Lactobacillus plantarum and Lactobacillus buchneri. J Appl Microbiol 2011; 110:1561-70. [DOI: 10.1111/j.1365-2672.2011.05010.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
4596
|
Guo XL, Li XL, Li Y, Gu ZL, Zheng CS, Wei ZH, Wang JS, Zhou RY, Li LH, Zheng HQ. Genetic variation of chicken MC1R gene in different plumage colour populations. Br Poult Sci 2011; 51:734-9. [PMID: 21161779 DOI: 10.1080/00071668.2010.518408] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
1. Genetic variation in the chicken MC1R gene was analysed through bioinformatic methods after polymerase chain reaction (PCR) amplification and sequencing of the coding region of MC1R gene from 5 different populations with 4 plumage colours (black, grey plumage with black spots, yellow plumage with black spots, red). 2. A total of 11 novel variations were detected in Hebei chickens, of which 8 were non-synonymous. Allele distribution analysis showed that the wild-type e(+) (Brown Leghorn) allele was mainly found in Hy-Line Brown and Lohmann Brown, the dominant Extended black E(AY220304) allele was mainly found in Hebei chicken with black plumage, whereas the Buttercup (e(bc)) allele was rare. 3. Nucleotide diversity (π) within each colour strain of Hebei chickens (0·0047-0·0052) was significantly greater than that of Hy-Line Brown (0·0024) or Lohmann Brown (0·0043). 4. The results indicate that there is abundant polymorphism in the MC1R gene, especially in Hebei chicken, which was associated with its rich plumage colour diversity.
Collapse
|
4597
|
Zhao HF, Li Q, Li Y. Long-term ginsenoside administration prevents memory loss in aged female C57BL/6J mice by modulating the redox status and up-regulating the plasticity-related proteins in hippocampus. Neuroscience 2011; 183:189-202. [PMID: 21463662 DOI: 10.1016/j.neuroscience.2011.03.048] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Revised: 03/22/2011] [Accepted: 03/22/2011] [Indexed: 12/13/2022]
Abstract
Memory impairment is considered to be one of the most prominent consequences of aging. Deterioration of memory begins in advance of old age in animals, including humans. The generation of reactive oxygen species (ROS) and/or free radicals-induced oxidative stress which is the major age-related changes, can lead to hippocampus damage and increase vulnerability to impaired learning and memory. Ginsenoside, the effective ingredient of ginseng, has been reported to have a neuron beneficial effect. In the present study, C57BL/6J mice aged 12 months were chronically treated with ginsenoside (three dose groups were given ginsenoside in drinking water for 8 months, the concentration of ginsenoside in drinking water was 0.028%, 0.056%, and 0.112% (w/v), respectively). Placebo-treated aged mice and young ones (4 months old) were used as controls. The efficacious effect of ginsenoside was manifested in the amelioration of memory impairment in aged mice by Morris water maze and step-down tests. Total superoxide dismutase (T-SOD), glutathione peroxidase (GSH-Px), and thiobarbituric acid reactive substances (TBARS) have been used as the biomarkers of oxidative stress. In ginsenoside treated groups, the activities of T-SOD and GSH-Px markedly increased, and the levels of TBARS and the content of protein carbonyl decreased significantly in serum and in hippocampus. The activation of lipofuscin formation, disruption or loss of cristae in mitochondria, the irregular nucleus and condensed chromatin laid against the nuclear membrane in pyramidal cells of hippocampal CA1 region, which are all related to oxidative stress, were also reduced after ginsenoside treatment. Processes of memory formation and functional plasticity are associated with postsynaptic density-95 (PSD-95), protein kinase Cγ subunit (PKCγ) and brain derived neurotrophic factor (BDNF). In the present study, we found that long-term ginsenoside treatment prevented age-related reductions of PSD-95, PKCγ, and BDNF in the hippocampus. These results demonstrated that long-term ginsenoside administration may prevent memory loss in aged C57BL/6J mice by modulating the redox status and up-regulating the plasticity-related proteins in hippocampus.
Collapse
|
4598
|
Meziane M, Brash EJ, Gilman R, Jones MK, Luo W, Pentchev L, Perdrisat CF, Puckett AJR, Punjabi V, Wesselmann FR, Ahmidouch A, Albayrak I, Aniol KA, Arrington J, Asaturyan A, Ates O, Baghdasaryan H, Benmokhtar F, Bertozzi W, Bimbot L, Bosted P, Boeglin W, Butuceanu C, Carter P, Chernenko S, Christy E, Commisso M, Cornejo JC, Covrig S, Danagoulian S, Daniel A, Davidenko A, Day D, Dhamija S, Dutta D, Ent R, Frullani S, Fenker H, Frlez E, Garibaldi F, Gaskell D, Gilad S, Goncharenko Y, Hafidi K, Hamilton D, Higinbotham DW, Hinton W, Horn T, Hu B, Huang J, Huber GM, Jensen E, Kang H, Keppel C, Khandaker M, King P, Kirillov D, Kohl M, Kravtsov V, Kumbartzki G, Li Y, Mamyan V, Margaziotis DJ, Markowitz P, Marsh A, Matulenko Y, Maxwell J, Mbianda G, Meekins D, Melnik Y, Miller J, Mkrtchyan A, Mkrtchyan H, Moffit B, Moreno O, Mulholland J, Narayan A, Nedev S, Piasetzky E, Pierce W, Piskunov NM, Prok Y, Ransome RD, Razin DS, Reimer PE, Reinhold J, Rondon O, Shabestari M, Shahinyan A, Shestermanov K, Širca S, Sitnik I, Smykov L, Smith G, Solovyev L, Solvignon P, Subedi R, Suleiman R, Tomasi-Gustafsson E, Vasiliev A, Vanderhaeghen M, Veilleux M, Wojtsekhowski BB, Wood S, Ye Z, Zanevsky Y, Zhang X, Zhang Y, Zheng X, Zhu L. Search for effects beyond the born approximation in polarization transfer observables in e(over→)p elastic scattering. PHYSICAL REVIEW LETTERS 2011; 106:132501. [PMID: 21520982 DOI: 10.1103/physrevlett.106.132501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2010] [Indexed: 05/30/2023]
Abstract
Intensive theoretical and experimental efforts over the past decade have aimed at explaining the discrepancy between data for the proton electric to magnetic form factor ratio, G(E)/G(M), obtained separately from cross section and polarization transfer measurements. One possible explanation for this difference is a two-photon-exchange contribution. In an effort to search for effects beyond the one-photon-exchange or Born approximation, we report measurements of polarization transfer observables in the elastic H(e[over →],e(')p[over →]) reaction for three different beam energies at a Q(2)=2.5 GeV(2), spanning a wide range of the kinematic parameter ε. The ratio R, which equals μ(p)G(E)/G(M) in the Born approximation, is found to be independent of ε at the 1.5% level. The ε dependence of the longitudinal polarization transfer component P(ℓ) shows an enhancement of (2.3±0.6)% relative to the Born approximation at large ε.
Collapse
|
4599
|
Domen J, Sun L, Trapp K, Li Y, Gandy K. 551 Early Tolerance Induction with Hematopoietic Stem Cells and Myeloid Progenitor Cells. J Heart Lung Transplant 2011. [DOI: 10.1016/j.healun.2011.01.563] [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] Open
|
4600
|
Li X, Zhang N, Li Y, Shi Y, Li D, Xie Y, Xie Y, Ming J. Effects of Metformin and Rosiglitazone on Peripheral Insulin Resistance and β-Cell Function in Obesity: A Double-Blind, Randomized, Controlled Study. J Int Med Res 2011; 39:358-65. [PMID: 21672339 DOI: 10.1177/147323001103900203] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Metformin and rosiglitazone combination therapy is known to improve insulin resistance and postpone diabetes mellitus development in subjects with impaired glucose tolerance. This double-blind, randomized, controlled study assessed this combination therapy for preventing type 2 diabetes in obese subjects with hyperinsulinaemia. Subjects received metformin (500 mg three times daily, orally) plus either rosiglitazone (4 mg once daily, orally; n = 94) or placebo ( n = 95) and were followed for 6 months. Blood pressure, body fat, body mass index (BMI), lipid and insulin levels were recorded pre-and post-treatment. Metformin plus rosiglitazone significantly decreased blood pressure, lipids, BMI, and fasting and postmeal insulin levels. Metformin plus placebo led to a significant decrease in blood pressure, BMI and lipid levels, but fasting and postmeal insulin levels were unchanged. Adverse events were similar between the two groups. The metformin and rosiglitazone combination increased insulin sensitivity and β-cell function recovered. This approach may represent a therapeutic option for preventing development of type 2 diabetes in obese subjects with hyperinsulinaemia.
Collapse
|