151
|
Zhou Y, Qiu X, Luo Y, Yuan J, Li Y, Zhong Q, Zhao M, Lu Q. Histone modifications and methyl-CpG-binding domain protein levels at the TNFSF7 (CD70) promoter in SLE CD4+ T cells. Lupus 2011; 20:1365-71. [PMID: 21865261 DOI: 10.1177/0961203311413412] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Abstract: In systemic lupus erythematosus (SLE), T lymphocytes overexpress CD70 ( TNFSF7 gene), leading to the synthesis of autoreactive IgGs. CD70 upregulation in SLE CD4+ T cells is associated with hypomethylation of TNFSF7 promoter. In this study, we explored histone modifications in the TNFSF7 promoter region in SLE CD4+ T cells, and characterized the effects of a DNA methyltransferase inhibitor (5-azaC) and a histone deacetylase inhibitor (TSA) on CD70 expression. We found that CD70 mRNA was significantly increased in active lupus CD4+ T cells, and in control cells treated with 5-azaC, TSA, or both. Histone H3 acetylation and dimethylated H3 lysine 4 (H3K4me2) levels were significantly elevated in patients with lupus, and both factors correlated positively with disease activity. MeCP2 protein levels within the TNFSF7 promoter decreased in patients with active lupus. Treatment of CD4+ T cells with 5-azaC alone significantly raised H3K4 dimethyl levels at the TNFSF7 locus. TSA treatment significantly increased H3 and H4 acetylation levels, as well as levels of H3K4 dimethylation at the TNFSF7 locus. Treatment with 5-azaC plus TSA enhanced H3 acetylation levels. These findings indicate that aberrant histone modifications within the TNFSF7 promoter may contribute to the development of lupus by increasing CD70 expression in CD4+ T cells.
Collapse
|
152
|
Lin G, Qiu X, Fandel T, Banie L, Wang G, Lue TF, Lin CS. Tracking intracavernously injected adipose-derived stem cells to bone marrow. Int J Impot Res 2011; 23:268-75. [PMID: 21796145 PMCID: PMC3516363 DOI: 10.1038/ijir.2011.38] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Intracavernous (IC) injection of stem cells (SCs) has been shown to improve erectile function in various erectile dysfunction (ED) animal models. However, the tissue distribution of the injected cells remains unknown. In this study we tracked IC injected adipose-derived stem cells (ADSCs) in various tissues. Rat paratesticular fat was processed for ADSC isolation and culture. The animals were then subject to cavernous nerve (CN) crush injury or sham operation, followed by IC injection of one million autologous or allogeneic ADSCs that were labeled with 5-ethynyl-2-deoxyuridine (EdU). Another group of rats received IC injection of EdU-labeled allogeneic penile smooth muscle cells (PSMCs). At 2 and 7 days post-injection, penises and femoral bone marrow were processed for histological analyses. Whole femoral bone marrows were also analyzed for EdU-positive cells by flow cytometry. The results show that ADSCs exited the penis within days of IC injection and migrated preferentially to bone marrow. Allogenicity did not affect ADSC's bone marrow appearance either at 2 or 7 days, while CN injury reduced the number of ADSCs in bone marrow significantly at 7 but not 2 days. The significance of these results in relation to SC therapy for ED is discussed.
Collapse
|
153
|
Adamson P, Andreopoulos C, Auty DJ, Ayres DS, Backhouse C, Barr G, Bishai M, Blake A, Bock GJ, Boehnlein DJ, Bogert D, Cavanaugh S, Cherdack D, Childress S, Choudhary BC, Coelho JAB, Coleman SJ, Corwin L, Cronin-Hennessy D, Danko IZ, de Jong JK, Devenish NE, Diwan MV, Dorman M, Escobar CO, Evans JJ, Falk E, Feldman GJ, Frohne MV, Gallagher HR, Gomes RA, Goodman MC, Gouffon P, Graf N, Gran R, Grant N, Grzelak K, Habig A, Harris D, Hartnell J, Hatcher R, Himmel A, Holin A, Howcroft C, Huang X, Hylen J, Ilic J, Irwin GM, Isvan Z, Jaffe DE, James C, Jensen D, Kafka T, Kasahara SMS, Koizumi G, Kopp S, Kordosky M, Kreymer A, Lang K, Lefeuvre G, Ling J, Litchfield PJ, Loiacono L, Lucas P, Mann WA, Marshak ML, Mayer N, McGowan AM, Mehdiyev R, Meier JR, Messier MD, Miller WH, Mishra SR, Mitchell J, Moore CD, Morfín J, Mualem L, Mufson S, Musser J, Naples D, Nelson JK, Newman HB, Nichol RJ, Nicholls TC, Nowak JA, Ochoa-Ricoux JP, Oliver WP, Orchanian M, Ospanov R, Paley J, Patterson RB, Pawloski G, Pearce GF, Petyt DA, Phan-Budd S, Plunkett RK, Qiu X, Ratchford J, Raufer TM, Rebel B, Rodrigues PA, Rosenfeld C, Rubin HA, Sanchez MC, Schneps J, Schreiner P, Shanahan P, Sousa A, Stamoulis P, Strait M, Tagg N, Talaga RL, Tetteh-Lartey E, Thomas J, Thomson MA, Tinti G, Toner R, Tzanakos G, Urheim J, Vahle P, Viren B, Weber A, Webb RC, White C, Whitehead L, Wojcicki SG, Yang T, Zwaska R. First direct observation of muon antineutrino disappearance. PHYSICAL REVIEW LETTERS 2011; 107:021801. [PMID: 21797594 DOI: 10.1103/physrevlett.107.021801] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2011] [Indexed: 05/31/2023]
Abstract
This Letter reports the first direct observation of muon antineutrino disappearance. The MINOS experiment has taken data with an accelerator beam optimized for ν(μ) production, accumulating an exposure of 1.71 × 10²⁰ protons on target. In the Far Detector, 97 charged current ν(μ) events are observed. The no-oscillation hypothesis predicts 156 events and is excluded at 6.3σ. The best fit to oscillation yields |Δm²| = [3.36(-0.40)(+0.46)(stat) ± 0.06(syst)] × 10⁻³ eV², sin²(2θ) = 0.86(-0.12)(+0.11)(stat) ± 0.01(syst). The MINOS ν(μ) and ν(μ) measurements are consistent at the 2.0% confidence level, assuming identical underlying oscillation parameters.
Collapse
|
154
|
Adamson P, Auty DJ, Ayres DS, Backhouse C, Barr G, Bishai M, Blake A, Bock GJ, Boehnlein DJ, Bogert D, Cavanaugh S, Cherdack D, Childress S, Coelho JAB, Coleman SJ, Corwin L, Cronin-Hennessy D, Danko IZ, de Jong JK, Devenish NE, Diwan MV, Dorman M, Escobar CO, Evans JJ, Falk E, Feldman GJ, Frohne MV, Gallagher HR, Gomes RA, Goodman MC, Gouffon P, Graf N, Gran R, Grant N, Grzelak K, Habig A, Harris D, Hartnell J, Hatcher R, Himmel A, Holin A, Huang X, Hylen J, Ilic J, Irwin GM, Isvan Z, Jaffe DE, James C, Jensen D, Kafka T, Kasahara SMS, Koizumi G, Kopp S, Kordosky M, Kreymer A, Lang K, Lefeuvre G, Ling J, Litchfield PJ, Loiacono L, Lucas P, Mann WA, Marshak ML, Mayer N, McGowan AM, Mehdiyev R, Meier JR, Messier MD, Miller WH, Mishra SR, Mitchell J, Moore CD, Morfín J, Mualem L, Mufson S, Musser J, Naples D, Nelson JK, Newman HB, Nichol RJ, Nicholls TC, Nowak JA, Oliver WP, Orchanian M, Paley J, Patterson RB, Pawloski G, Pearce GF, Petyt DA, Phan-Budd S, Pittam R, Plunkett RK, Qiu X, Ratchford J, Raufer TM, Rebel B, Rodrigues PA, Rosenfeld C, Rubin HA, Sanchez MC, Schneps J, Schreiner P, Sharma R, Shanahan P, Sousa A, Stamoulis P, Strait M, Tagg N, Talaga RL, Tetteh-Lartey E, Thomas J, Thomson MA, Tinti G, Toner R, Torretta D, Tzanakos G, Urheim J, Vahle P, Viren B, Walding JJ, Weber A, Webb RC, White C, Whitehead L, Wojcicki SG, Zwaska R. Active to sterile neutrino mixing limits from neutral-current interactions in MINOS. PHYSICAL REVIEW LETTERS 2011; 107:011802. [PMID: 21797535 DOI: 10.1103/physrevlett.107.011802] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Indexed: 05/31/2023]
Abstract
Results are reported from a search for active to sterile neutrino oscillations in the MINOS long-baseline experiment, based on the observation of neutral-current neutrino interactions, from an exposure to the NuMI neutrino beam of 7.07×10(20) protons on target. A total of 802 neutral-current event candidates is observed in the Far Detector, compared to an expected number of 754 ± 28(stat) ± 37(syst) for oscillations among three active flavors. The fraction f(s) of disappearing ν(μ) that may transition to ν(s) is found to be less than 22% at the 90% C.L.
Collapse
|
155
|
Adamson P, Andreopoulos C, Armstrong R, Auty DJ, Ayres DS, Backhouse C, Barr G, Bishai M, Blake A, Bock GJ, Boehnlein DJ, Bogert D, Cavanaugh S, Cherdack D, Childress S, Choudhary BC, Coelho JAB, Coleman SJ, Corwin L, Cronin-Hennessy D, Danko IZ, de Jong JK, Devenish NE, Diwan MV, Dorman M, Escobar CO, Evans JJ, Falk E, Feldman GJ, Frohne MV, Gallagher HR, Gomes RA, Goodman MC, Gouffon P, Graf N, Gran R, Grant N, Grzelak K, Habig A, Harris D, Hartnell J, Hatcher R, Himmel A, Holin A, Huang X, Hylen J, Ilic J, Irwin GM, Isvan Z, Jaffe DE, James C, Jensen D, Kafka T, Kasahara SMS, Koizumi G, Kopp S, Kordosky M, Kreymer A, Lang K, Lefeuvre G, Ling J, Litchfield PJ, Litchfield RP, Loiacono L, Lucas P, Mann WA, Marshak ML, Mayer N, McGowan AM, Mehdiyev R, Meier JR, Messier MD, Michael DG, Miller WH, Mishra SR, Mitchell J, Moore CD, Morfín J, Mualem L, Mufson S, Musser J, Naples D, Nelson JK, Newman HB, Nichol RJ, Nowak JA, Oliver WP, Orchanian M, Ospanov R, Paley J, Patterson RB, Pawloski G, Pearce GF, Petyt DA, Phan-Budd S, Plunkett RK, Qiu X, Ratchford J, Raufer TM, Rebel B, Rodrigues PA, Rosenfeld C, Rubin HA, Sanchez MC, Schneps J, Schreiner P, Shanahan P, Smith C, Sousa A, Stamoulis P, Strait M, Tagg N, Talaga RL, Thomas J, Thomson MA, Tinti G, Toner R, Tzanakos G, Urheim J, Vahle P, Viren B, Weber A, Webb RC, White C, Whitehead L, Wojcicki SG, Yang T, Zwaska R. Measurement of the neutrino mass splitting and flavor mixing by MINOS. PHYSICAL REVIEW LETTERS 2011; 106:181801. [PMID: 21635083 DOI: 10.1103/physrevlett.106.181801] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Indexed: 05/30/2023]
Abstract
Measurements of neutrino oscillations using the disappearance of muon neutrinos from the Fermilab NuMI neutrino beam as observed by the two MINOS detectors are reported. New analysis methods have been applied to an enlarged data sample from an exposure of 7.25×10(20) protons on target. A fit to neutrino oscillations yields values of |Δm(2)|=(2.32(-0.08)(+0.12))×10(-3) eV(2) for the atmospheric mass splitting and sin(2)(2θ)>0.90 (90% C.L.) for the mixing angle. Pure neutrino decay and quantum decoherence hypotheses are excluded at 7 and 9 standard deviations, respectively.
Collapse
|
156
|
Ahmed Z, Akerib DS, Arrenberg S, Bailey CN, Balakishiyeva D, Baudis L, Bauer DA, Brink PL, Bruch T, Bunker R, Cabrera B, Caldwell DO, Cooley J, do Couto e Silva E, Cushman P, Daal M, DeJongh F, Di Stefano P, Dragowsky MR, Duong L, Fallows S, Figueroa-Feliciano E, Filippini J, Fox J, Fritts M, Golwala SR, Hall J, Hennings-Yeomans R, Hertel SA, Holmgren D, Hsu L, Huber ME, Kamaev O, Kiveni M, Kos M, Leman SW, Liu S, Mahapatra R, Mandic V, McCarthy KA, Mirabolfathi N, Moore D, Nelson H, Ogburn RW, Phipps A, Pyle M, Qiu X, Ramberg E, Rau W, Reisetter A, Resch R, Saab T, Sadoulet B, Sander J, Schnee RW, Seitz DN, Serfass B, Sundqvist KM, Tarka M, Wikus P, Yellin S, Yoo J, Young BA, Zhang J. Results from a low-energy analysis of the CDMS II germanium data. PHYSICAL REVIEW LETTERS 2011; 106:131302. [PMID: 21517371 DOI: 10.1103/physrevlett.106.131302] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2010] [Indexed: 05/30/2023]
Abstract
We report results from a reanalysis of data from the Cryogenic Dark Matter Search (CDMS II) experiment at the Soudan Underground Laboratory. Data taken between October 2006 and September 2008 using eight germanium detectors are reanalyzed with a lowered, 2 keV recoil-energy threshold, to give increased sensitivity to interactions from weakly interacting massive particles (WIMPs) with masses below ∼10 GeV/c(2). This analysis provides stronger constraints than previous CDMS II results for WIMP masses below 9 GeV/c(2) and excludes parameter space associated with possible low-mass WIMP signals from the DAMA/LIBRA and CoGeNT experiments.
Collapse
|
157
|
Adamson P, Andreopoulos C, Auty DJ, Ayres DS, Backhouse C, Barr G, Barrett WL, Bhattarai P, Bishai M, Blake A, Bock GJ, Boehnlein DJ, Bogert D, Budd S, Cavanaugh S, Cherdack D, Childress S, Choudhary BC, Coelho JAB, Coleman SJ, Corwin L, Cronin-Hennessy D, Damiani D, Danko IZ, de Jong JK, Devenish NE, Diwan MV, Dorman M, Escobar CO, Evans JJ, Falk E, Feldman GJ, Fields TH, Frohne MV, Gallagher HR, Gomes RA, Goodman MC, Gouffon P, Graf N, Gran R, Grant N, Grzelak K, Habig A, Harris D, Harris PG, Hartnell J, Hatcher R, Himmel A, Holin A, Huang X, Hylen J, Ilic J, Irwin GM, Isvan Z, Jaffe DE, James C, Jensen D, Kafka T, Kasahara SMS, Koizumi G, Kopp S, Kordosky M, Krahn Z, Kreymer A, Lang K, Lefeuvre G, Ling J, Litchfield PJ, Loiacono L, Lucas P, Mann WA, Marshak ML, Mayer N, McGowan AM, Mehdiyev R, Meier JR, Messier MD, Michael DG, Miller WH, Mishra SR, Mitchell J, Moore CD, Morfín J, Mualem L, Mufson S, Musser J, Naples D, Nelson JK, Newman HB, Nichol RJ, Nowak JA, Oliver WP, Orchanian M, Paley J, Patterson RB, Pawloski G, Pearce GF, Pittam R, Plunkett RK, Qiu X, Ratchford J, Raufer TM, Rebel B, Reichenbacher J, Rodrigues PA, Rosenfeld C, Rubin HA, Ryabov VA, Sanchez MC, Saoulidou N, Schneps J, Schreiner P, Shanahan P, Sousa A, Strait M, Tagg N, Talaga RL, Thomas J, Thomson MA, Tinti G, Toner R, Tzanakos G, Urheim J, Vahle P, Viren B, Weber A, Webb RC, White C, Whitehead L, Wojcicki SG, Wright DM, Yang T, Zwaska R. Measurement of the underground atmospheric muon charge ratio using the MINOS Near Detector. Int J Clin Exp Med 2011. [DOI: 10.1103/physrevd.83.032011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
158
|
Qiu X, Sun C, Yu W, Lin H, Sun Z, Chen Y, Wang R, Dai Y. Combined Strategy of Mesenchymal Stem Cell Injection With Vascular Endothelial Growth Factor Gene Therapy for the Treatment of Diabetes-Associated Erectile Dysfunction. ACTA ACUST UNITED AC 2011; 33:37-44. [DOI: 10.2164/jandrol.110.012666] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
159
|
White AB, Galbiati F, Givogri MI, Lopez Rosas A, Qiu X, van Breemen R, Bongarzone ER. Persistence of psychosine in brain lipid rafts is a limiting factor in the therapeutic recovery of a mouse model for Krabbe disease. J Neurosci Res 2010; 89:352-64. [PMID: 21259322 DOI: 10.1002/jnr.22564] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Revised: 10/18/2010] [Accepted: 10/30/2010] [Indexed: 11/10/2022]
Abstract
Sphingolipids are intrinsic components of membrane lipid rafts. The abnormal accumulation of these molecules may introduce architectural and functional changes in these domains, leading to cellular dysfunction. Galactosylsphingosine (psychosine) is a pathogenic lipid raft-associated molecule whose accumulation leads to brain deterioration and irreversible neurological handicap in the incurable leukodystrophy Krabbe disease (KD). The relevance of clearing excessive levels of pathogenic psychosine from lipid rafts in therapy for KD has not been investigated. The work presented here demonstrates that psychosine inhibits raft-mediated endocytosis in neural cells. In addition, although in vitro enzyme reconstitution is sufficient for the reversal of related endocytic defects in affected neural cells, traditional in vivo enzyme therapies in the mouse model of KD appear to be insufficient for complete removal of pathogenic levels of raft-associated psychosine. This work describes a mechanism that may contribute to limiting the in vivo efficacy of traditional therapies for KD.
Collapse
|
160
|
Pan G, Yan G, Song X, Qiu X. BP neural network classification for bleeding detection in wireless capsule endoscopy. J Med Eng Technol 2010; 33:575-81. [PMID: 19639509 DOI: 10.1080/03091900903111974] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Bleeding in the digestive tract is one of the most common gastrointestinal tract (GI) diseases, as well as the complication of some fatal diseases. Wireless capsule endoscopy (WCE) allows physicians to noninvasively examine the entire GI tract. However it is very laborious and time-consuming to inspect large numbers of WCE images, which limits the wider application of WCE. It is therefore important to develop an automatic and intelligent computer-aided bleeding detection technique. In this paper, a new method aimed at bleeding detection in WCE images is proposed. Colour texture features distinguishing the bleeding regions from non-bleeding regions are extracted in RGB and HSI colour spaces; then a neural network using the colour texture features as the feature vector inputs is designed to recognize the bleeding regions. The experiments demonstrate that the bleeding regions can be correctly recognized and clearly marked out. The sensitivity of the algorithm is 93% and the specificity is 96%.
Collapse
|
161
|
Guo G, Qiu X, Wang S, Chen Y, Rothman PB, Wang Z, Chen Y, Wang G, Chen JL. Oncogenic E17K mutation in the pleckstrin homology domain of AKT1 promotes v-Abl-mediated pre-B-cell transformation and survival of Pim-deficient cells. Oncogene 2010; 29:3845-53. [PMID: 20440266 DOI: 10.1038/onc.2010.149] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abl-mediated transformation requires the activation of multiple pathways involved in the cellular proliferation and survival, including PI3K/AKT and JAK/STAT-dependent Pim kinases. Recently, the E17K mutation in the AKT1 has been associated with multiple human malignancies and leukemia in mice. However, this mutation has not been identified in Abl-transformed cells. We investigated the presence of the AKT1(E17K) mutation in v-Abl-transformed cell clones. AKT1(E17K) was detected in 3 (2.6%) of 116 specimens examined. To show the involvement of AKT1(E17K) directly in v-Abl-mediated tumorigenesis, we infected bone marrow cells from mice with bicistronic retroviruses encoding v-Abl and either wild-type or the mutant AKT1. Interestingly, we found that E17K mutant greatly increased the v-Abl transformation efficiency as compared with wild-type AKT1. Ectopic expression of E17K mutant increased the expression levels of antiapoptotic protein BCL2 and phosphorylation levels of proapoptotic protein BAD. This correlated with an increased protection from imatinib-induced apoptosis in Abl transformants. Furthermore, AKT1(E17K) promotes survival of the Pim-deficient cells, indicating a functional link between AKT and Pim in v-Abl transformation. In addition, AKT1(E17K) delays loss of Pim-1 and Pim-2 protein levels on v-Abl inactivation, which suggests that there exists reciprocal signaling between AKT and Pim in v-Abl transformants.
Collapse
|
162
|
Aziz K, Ma X, Singhal N, McMillan D, Lockyer J, Qiu X, Du L, Lee SK. The Acute Care Of At-Risk Newborns (Acorn) Program Improves Learner Outcomes In Rural China. Paediatr Child Health 2010. [DOI: 10.1093/pch/15.suppl_a.15aa] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
163
|
Qiu X, Jefferies A, Chiu A, Macartney J, Osiovich H, Simmons B, Lee S. Trainees' Perspectives On An in ternational Training Program in Neonatal-Perinatal Medicine in Shanghai. Paediatr Child Health 2010. [DOI: 10.1093/pch/15.suppl_a.60a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
164
|
Dong JK, Zhou SY, Guan TY, Zhang H, Dai YF, Qiu X, Wang XF, He Y, Chen XH, Li SY. Quantum criticality and nodal superconductivity in the FeAs-based superconductor KFe2As2. PHYSICAL REVIEW LETTERS 2010; 104:087005. [PMID: 20366962 DOI: 10.1103/physrevlett.104.087005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2010] [Indexed: 05/29/2023]
Abstract
The in-plane resistivity rho and thermal conductivity kappa of the FeAs-based superconductor KFe2As2 single crystal were measured down to 50 mK. We observe non-Fermi-liquid behavior rho(T) approximately T{1.5} at H{c{2}}=5 T, and the development of a Fermi liquid state with rho(T) approximately T{2} when further increasing the field. This suggests a field-induced quantum critical point, occurring at the superconducting upper critical field H{c{2}}. In zero field, there is a large residual linear term kappa{0}/T, and the field dependence of kappa_{0}/T mimics that in d-wave cuprate superconductors. This indicates that the superconducting gaps in KFe2As2 have nodes, likely d-wave symmetry. Such a nodal superconductivity is attributed to the antiferromagnetic spin fluctuations near the quantum critical point.
Collapse
|
165
|
Qiu J, Zhang Y, Guo X, Zeng F, Zhao C, Qiu X, Wu X. Quantitation of thyroid-stimulating hormone receptor mRNA with real-time PCR for early diagnosis of papillary thyroid microcarcinoma. Neoplasma 2010; 57:360-364. [PMID: 20429628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
UNLABELLED Recently, the value of thyroid-stimulating hormone receptor(TSHR) mRNA as a molecular marker in diagnosis of thyroid cancer has been greatly explored. However, its role in detecting thyroid microcarcinoma has never been reported. In this study, we aim to investigate the value of TSHR mRNA in diagnosis of papillary thyroid microcarcinoma(PTMC). To do that, TSHR mRNA levels were measured by real time PCR in 30 healthy subjects and 72 patients (benign thyroid nodules, n=38; PTMC, n=34). TSHR mRNA levels were then compared with cancer volume in surgical specimen. We found that TSHR mRNA levels in PTMC were significantly higher than benign thyroid nodules(P<0.01). At a cutoff value of 0.71 ng/microg total RNA, the TSHR mRNA correctly classified 77.8% of patients preoperatively (sensitivity= 76.5%; specificity= 79.4%). Comparatively, it performed better in larger PTMC of 0.5-1.0 cm than <0.5 cm(sensitivity, 83.4% vs 72.4%; specificity, 88.5% vs 74.1%). Combining TSHR mRNA and ultra sound examination correctly detect 97.1% of PTMC and could spared surgery in 86.8% of patients with benign thyroid nodules. Thus, TSHR mRNA measured with real time PCR enhances the preoperative detection of PTMC in patients with thyroid nodules, which dramatically reduces unnecessary surgeries. KEYWORDS thyroid-stimulating hormone receptor, papillary thyroid microcarcinoma, diagnosis.
Collapse
|
166
|
Van Gelder RN, Lamprecht T, Mawad K, Sexton T, Qiu X. Mechanisms of murine melanopsin-mediated photoreception. J Vis 2009. [DOI: 10.1167/9.14.25] [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
|
167
|
Hu H, Qiu X, Wang J, Ju A, Zhang Y. Subdivision and direction recognition of lambda/16 of orthogonal fringes for nanometric measurement. APPLIED OPTICS 2009; 48:6479-6484. [PMID: 19935969 DOI: 10.1364/ao.48.006479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Subdivision is one of the essential methods to improve the measurement resolution of optical instruments. A new method is proposed to solve lambda/16 bidirectional subdivision and direction recognition for orthogonal interference signals by constructing two sets of reference signals and using zero-cross detection. The experimental results prove that the method is efficient for orthogonal signals and has good real-time performance by field-programmable gate array realization. This method is easy to realize by use of electronic design automation tools and can be widely used in the signal processing system of optical measurement instruments such as a moiré fringe measurement system and laser interferometer.
Collapse
|
168
|
Lei W, Luo Y, Lei W, Luo Y, Yan K, Zhao S, Li Y, Qiu X, Zhou Y, Long H, Zhao M, Liang Y, Su Y, Lu Q. Abnormal DNA methylation in CD4+ T cells from patients with systemic lupus erythematosus, systemic sclerosis, and dermatomyositis. Scand J Rheumatol 2009; 38:369-74. [DOI: 10.1080/03009740902758875] [Citation(s) in RCA: 149] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
169
|
Ahmed Z, Akerib DS, Arrenberg S, Bailey CN, Balakishiyeva D, Baudis L, Bauer DA, Beaty J, Brink PL, Bruch T, Bunker R, Cabrera B, Caldwell DO, Cooley J, Cushman P, Dejongh F, Dragowsky MR, Duong L, Figueroa-Feliciano E, Filippini J, Fritts M, Golwala SR, Grant DR, Hall J, Hennings-Yeomans R, Hertel S, Holmgren D, Hsu L, Huber ME, Kamaev O, Kiveni M, Kos M, Leman SW, Mahapatra R, Mandic V, Moore D, McCarthy KA, Mirabolfathi N, Nelson H, Ogburn RW, Pyle M, Qiu X, Ramberg E, Rau W, Reisetter A, Saab T, Sadoulet B, Sander J, Schnee RW, Seitz DN, Serfass B, Sundqvist KM, Tarka M, Wang G, Yellin S, Yoo J, Young BA. Search for axions with the CDMS experiment. PHYSICAL REVIEW LETTERS 2009; 103:141802. [PMID: 19905561 DOI: 10.1103/physrevlett.103.141802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2009] [Indexed: 05/28/2023]
Abstract
We report on the first axion search results from the Cryogenic Dark Matter Search (CDMS) experiment at the Soudan Underground Laboratory. An energy threshold of 2 keV for electron-recoil events allows a search for possible solar axion conversion into photons or local galactic axion conversion into electrons in the germanium crystal detectors. The solar axion search sets an upper limit on the Primakov coupling g(agammagamma) of 2.4x10(-9) GeV-1 at the 95% confidence level for an axion mass less than 0.1 keV/c2. This limit benefits from the first precise measurement of the absolute crystal plane orientations in this type of experiment. The galactic axion search analysis sets a world-leading experimental upper limit on the axioelectric coupling g(aee) of 1.4x10(-12) at the 90% confidence level for an axion mass of 2.5 keV/c2.
Collapse
|
170
|
Qiu X, Lee SK, CNN. The Effect of Small for Gestational Age on Outcomes of Very Preterm Nicu Infants in Canada. Paediatr Child Health 2009. [DOI: 10.1093/pch/14.suppl_a.12ab] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
171
|
Ahmed Z, Akerib DS, Arrenberg S, Attisha MJ, Bailey CN, Baudis L, Bauer DA, Beaty J, Brink PL, Bruch T, Bunker R, Burke S, Cabrera B, Caldwell DO, Cooley J, Cushman P, Dejongh F, Dragowsky MR, Duong L, Emes J, Figueroa-Feliciano E, Filippini J, Fritts M, Gaitskell RJ, Golwala SR, Grant DR, Hall J, Hennings-Yeomans R, Hertel S, Holmgren D, Huber ME, Mahapatra R, Mandic V, McCarthy KA, Mirabolfathi N, Nelson H, Novak L, Ogburn RW, Pyle M, Qiu X, Ramberg E, Rau W, Reisetter A, Saab T, Sadoulet B, Sander J, Schmitt R, Schnee RW, Seitz DN, Serfass B, Sirois A, Sundqvist KM, Tarka M, Tomada A, Wang G, Yellin S, Yoo J, Young BA. Search for weakly interacting massive particles with the first five-tower data from the cryogenic dark matter search at the soudan underground laboratory. PHYSICAL REVIEW LETTERS 2009; 102:011301. [PMID: 19257177 DOI: 10.1103/physrevlett.102.011301] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2008] [Indexed: 05/27/2023]
Abstract
We report results from the Cryogenic Dark Matter Search at the Soudan Underground Laboratory (CDMS II) featuring the full complement of 30 detectors. A blind analysis of data taken between October 2006 and July 2007 sets an upper limit on the weakly interacting massive particle (WIMP) nucleon spin-independent cross section of 6.6x10;{-44} cm;{2} (4.6x10;{-44} cm;{2} when combined with previous CDMS II data) at the 90% confidence level for a WIMP mass of 60 GeV/c;{2}. This achieves the best sensitivity for dark matter WIMPs with masses above 44 GeV/c;{2}, and significantly restricts the parameter space for some favored supersymmetric models.
Collapse
|
172
|
Qiu X, Kulasekara B, Lory S. Role of Horizontal Gene Transfer in the Evolution of <i>Pseudomonas aeruginosa</i> Virulence. MICROBIAL PATHOGENOMICS 2009; 6:126-139. [DOI: 10.1159/000235767] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
173
|
Sun B, Zhao Y, Qiu X, Han C, Yu Y, Shi Z. Substitution Effect of 1,7-Asymmetrically Substituted 3,4:9,10-Perylenebis(dicarboximide) Dyes. Supramol Chem 2008. [DOI: 10.1080/10610270701474447] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
174
|
Qiu X. Crystal structure of cholesteryl ester transfer protein. Acta Crystallogr A 2008. [DOI: 10.1107/s010876730807921x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
175
|
Arthington JD, Qiu X, Cooke RF, Vendramini JMB, Araujo DB, Chase CC, Coleman SW. Effects of preshipping management on measures of stress and performance of beef steers during feedlot receiving. J Anim Sci 2008; 86:2016-23. [PMID: 18407994 DOI: 10.2527/jas.2008-0968] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Over 2 yr, a total of 96 steers (approximately 7 mo of age) were allocated to 1 of 4 weaning management strategies: 1) control: weaned on the day of shipping; 2) creep-fed: allowed free-choice access to concentrate before weaning and shipping; 3) preweaned: weaned and provided supplemental concentrate on pasture before shipping; and 4) early-weaned: weaned at 70 to 90 d of age and kept on pasture. On the day of shipping, steers were loaded together onto a commercial livestock trailer and transported 1,600 km over 24 h before being received into the feedlot. At the feedlot, steers were penned by treatment (4 pens/treatment) and provided access to free-choice hay and concentrate in separate feeding spaces. Samples of blood were collected on d 0, 1, 4, 8, 15, 22, and 29 relative to shipping. Steer performance was assessed over the receiving period, including DMI of hay and concentrate, ADG, and G:F. Predetermined contrasts included control vs. early-weaned, creep-fed vs. preweaned, and control vs. creep-fed and preweaned. Overall ADG was greater (P < 0.01) for early-weaned vs. control steers (1.39 vs. 0.88 kg). In wk 1, early-weaned steers consumed more concentrate and less hay compared with control steers (P < 0.03), and preweaned steers consumed more concentrate (P < 0.01) but a similar amount of hay (P = 0.75) compared with creep-fed steers. Average DMI was greater for preweaned compared with creep-fed steers (2.84 vs. 2.50% of BW; P = 0.01) and tended to be greater for early-weaned compared with control steers (2.76 vs. 2.50% of BW; P = 0.06). Feed efficiency of early-weaned steers was greater than that of control steers (G:F = 0.17 vs. 0.12; P < 0.01) but similar for preweaned compared with creep-fed steers (P = 0.72). Plasma ceruloplasmin concentrations were less (P < 0.05) in control vs. early-weaned steers on d 0, but increased sharply after shipping and were greater in control vs. early-weaned steers on d 15 and 22 (P < 0.05). Creep-fed steers also experienced greater (P < 0.05) plasma ceruloplasmin concentrations than preweaned steers on d 29. These data suggest that early-weaned steers have improved performance in the feedlot compared with steers weaned directly before transport and feedlot entry. Differences in preshipping management appear to significantly affect measures of the acute phase protein response in steers.
Collapse
|