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Cattell C, Breneman A, Colpitts C, Dombeck J, Thaller S, Tian S, Wygant J, Fennell J, Hudson MK, Ergun R, Russell CT, Torbert R, Lindqvist P, Burch J. Dayside response of the magnetosphere to a small shock compression: Van Allen Probes, Magnetospheric MultiScale, and GOES-13. GEOPHYSICAL RESEARCH LETTERS 2017; 44:8712-8720. [PMID: 29104327 PMCID: PMC5661744 DOI: 10.1002/2017gl074895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 08/04/2017] [Accepted: 08/08/2017] [Indexed: 06/07/2023]
Abstract
Observations from Magnetospheric MultiScale (~8 Re) and Van Allen Probes (~5 and 4 Re) show that the initial dayside response to a small interplanetary shock is a double-peaked dawnward electric field, which is distinctly different from the usual bipolar (dawnward and then duskward) signature reported for large shocks. The associated E × B flow is radially inward. The shock compressed the magnetopause to inside 8 Re, as observed by Magnetospheric MultiScale (MMS), with a speed that is comparable to the E × B flow. The magnetopause speed and the E × B speeds were significantly less than the propagation speed of the pulse from MMS to the Van Allen Probes and GOES-13, which is consistent with the MHD fast mode. There were increased fluxes of energetic electrons up to several MeV. Signatures of drift echoes and response to ULF waves also were seen. These observations demonstrate that even very weak shocks can have significant impact on the radiation belts.
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Chiron R, Hubert D, Reix P, Collas-Aubert V, Tian S, Kiefer P, Kinnman N. 49 Lumacaftor/ivacaftor (LUM/IVA) treatment in patients (pts) with cystic fibrosis (CF) aged ≥12 years homozygous for F508del-CFTR: description of a French Temporary Authorization for Use (ATU) cohort. J Cyst Fibros 2017. [DOI: 10.1016/s1569-1993(17)30414-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Bessonova L, Volkova N, Higgins M, Bengtsson L, Tian S, Simard C, Sewall A, Nyangoma S, Elbert A, Bilton D. EPS5.10 Real-world outcomes in patients (pts) with cystic fibrosis (CF) treated with ivacaftor (IVA): analysis of 2015 US and UK CF registry data. J Cyst Fibros 2017. [DOI: 10.1016/s1569-1993(17)30321-1] [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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Taylor-Cousar J, Jain M, Barto T, Haddad T, Atkinson J, Tian S, Tang R, Marigowda G, Waltz D, Pilewski J. 55 Lumacaftor/ivacaftor (LUM/IVA) in patients (pts) with cystic fibrosis (CF) and advanced lung disease homozygous for F508del-CFTR: a 24-week open-label study. J Cyst Fibros 2017. [DOI: 10.1016/s1569-1993(17)30420-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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80
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Ratjen F, Tian S, Marigowda G, Hug C, Huang X, Stanojevic S, Milla C, Robinson P, Waltz D, Davies J. WS13.4 Efficacy and safety of lumacaftor/ivacaftor (LUM/IVA) in patients (pts) aged 6–11 years (yrs) with cystic fibrosis (CF) homozygous for F508del-CFTR: a randomized placebo (PBO)-controlled phase 3 trial. J Cyst Fibros 2017. [DOI: 10.1016/s1569-1993(17)30234-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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81
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Bessonova L, Volkova N, Higgins M, Bengtsson L, Tian S, Simard C, Nyangoma S, Bilton D. 411 Disease progression in patients (pts) with cystic fibrosis (CF) treated with ivacaftor (IVA): analysis of real-world data from the UK CF Registry. J Cyst Fibros 2017. [DOI: 10.1016/s1569-1993(17)30741-5] [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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82
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Tian S. Comment on: waist-to-height ratio, body mass index and waist circumference for screening paediatric cardio-metabolic risk factors: a meta-analysis. Obes Rev 2016; 17:1341. [PMID: 27749995 DOI: 10.1111/obr.12477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 09/21/2016] [Indexed: 11/28/2022]
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83
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Tian S, Wang Y, Wang H, Cui L. Interstimulus Interval Effect on Event-Related Potential N270 in a Color Matching Task. ACTA ACUST UNITED AC 2016; 32:82-6. [PMID: 11360725 DOI: 10.1177/155005940103200207] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Event-related brain potentials were recorded in a matching task, in which subjects were asked to discriminate if the color of the second stimulus (S2) was the same as the first stimulus (S1). The interstimulus interval between the two stimuli of a pair was of three levels (150 ms, 500 ms and 1000 ms). A negative component about 270 ms after the presentation of S2 was elicited when the color of the two stimuli was not identical for the interstimulus interval of 500 ms and 1000 ms, but not for the interval of 150 ms. This may suggest that N270 represented the response of the brain to conflicting information between different cortical levels.
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Bai Y, Higgins M, Volkova N, Bengtsson L, Tian S, Sewall A, Nyangoma S, Elbert A, Bilton D. ePS03.2 Real-world outcomes in patients (pts) with cystic fibrosis (CF) treated with ivacaftor (IVA): analysis of 2014 US and UK CF registries. J Cyst Fibros 2016. [DOI: 10.1016/s1569-1993(16)30206-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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85
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Seliger V, Bessonova L, Volkova N, Simard C, Tian S. 158 Background incidence of liver function test (LFT) abnormalities in patients (pts) with cystic fibrosis (CF). J Cyst Fibros 2016. [DOI: 10.1016/s1569-1993(16)30396-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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86
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Bai Y, Higgins M, Volkova N, Bengtsson L, Tian S, Sewall A, Nyangoma S, Elbert A, Bilton D. 25 Real-world outcomes in young (6- to 12-year-old) patients (pts) with cystic fibrosis (CF) treated with ivacaftor (IVA): analysis of 2014 US and UK CF registries data. J Cyst Fibros 2016. [DOI: 10.1016/s1569-1993(16)30265-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Volkova N, Bai Y, Higgins M, Bengtsson L, Tian S, Nyangoma S, Bilton D. ePS03.1 Disease progression in patients (pts) with cystic fibrosis (CF) treated with ivacaftor (IVA): analysis of real-world data from the UK CF Registry. J Cyst Fibros 2016. [DOI: 10.1016/s1569-1993(16)30205-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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88
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Yan C, Yang H, Wang Y, Dong Y, Yu F, Wu Y, Wang W, Adaku U, Lutfy K, Friedman TC, Tian S, Liu Y. Increased glycogen synthase kinase-3β and hexose-6-phosphate dehydrogenase expression in adipose tissue may contribute to glucocorticoid-induced mouse visceral adiposity. Int J Obes (Lond) 2016; 40:1233-41. [PMID: 27102048 PMCID: PMC4970937 DOI: 10.1038/ijo.2016.57] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 03/14/2016] [Accepted: 03/22/2016] [Indexed: 01/25/2023]
Abstract
BACKGROUND Increased adiposity in visceral depots is a crucial feature associated with glucocorticoid (GC) excess. The action of GCs in target tissue is regulated by GC receptor (GR) and 11ß-hydroxysteroid dehydrogenase type 1 (11ß-HSD1) coupled with hexose-6-phosphate dehydrogenase (H6pdh). Glycogen synthase kinase-3β (GSK3β) is known to be a crucial mediator of ligand-dependent gene transcription. We hypothesized that the major effects of corticosteroids on adipose fat accumulation are in part medicated by changes in GSK3β and H6pdh. METHODS We characterized the alterations of GSK3β and GC metabolic enzymes, and determined the impact of GR antagonist mifepristone on obesity-related genes and the expression of H6pdh and 11ß-HSD1 in adipose tissue of mice exposed to excess GC as well as in in vitro studies using 3T3-L1 adipocytes treated with GCs. RESULTS Corticosterone (CORT) exposure increased abdominal fat mass and induced expression of lipid synthase ACC and ACL with activation of GSK3β phosphorylation in abdominal adipose tissue of C57BL/6J mice. Increased pSer9 GSK3β was correlated with induction of H6pdh and 11ß-HSD1. Additionally, mifepristone treatment reversed the production of H6pdh and attenuated CORT-mediated production of 11ß-HSD1 and lipogenic gene expression with reduction of pSer9 GSK3β, thereby leading to improvement of phenotype of adiposity within adipose tissue in mice treated with excess GCs. Suppression of pSer9 GSK3β by mifepristone was accompanied by activation of pThr308 Akt and blockade of CORT-induced adipogenic transcriptor C/EBPα and PPARγ. In addition, mifepristone also attenuated CORT-mediated activation of IRE1α/XBP1. Additionally, reduction of H6pdh by shRNA showed comparable effects to mifepristone on attenuating CORT-induced expression of GC metabolic enzymes and improved lipid accumulation in vitro in 3T3-L1 adipocytes. CONCLUSION These findings suggest that elevated adipose GSK3β and H6pdh expression contribute to 11ß-HSD1 mediating hypercortisolism associated with visceral adiposity.
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Moore CEJ, Pickford J, Cagampang FR, Stead RL, Tian S, Zhao X, Tang X, Byrne CD, Proud CG. MNK1 and MNK2 mediate adverse effects of high-fat feeding in distinct ways. Sci Rep 2016; 6:23476. [PMID: 27087055 PMCID: PMC4834573 DOI: 10.1038/srep23476] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 03/07/2016] [Indexed: 02/06/2023] Open
Abstract
The MAP kinase-interacting kinases (MNK1 and MNK2) are non-essential enzymes which are activated by MAP kinases. They are implicated in controlling protein synthesis. Here we show that mice in which the expression of either MNK1 or MNK2 has been knocked out (KO) are protected against adverse effects of high-fat feeding, and in distinct ways. High-fat diet (HFD)-fed MNK2-KO show less weight gain than wild-type animals, and improved glucose tolerance, better insulin sensitivity and markedly diminished adipose tissue inflammation. This suggests MNK2 plays a role in adipogenesis and/or lipogenesis and in macrophage biology. MNK1-KO/HFD mice show better glucose tolerance and insulin sensitivity, but gain weight and show similar adipose inflammation to WT animals. These data suggest MNK1 participates in mediating HFD-induced insulin resistance. Our findings reveal distinct roles for the MNKs in a novel area of disease biology, metabolic dysfunction, and suggests they are potential new targets for managing metabolic disease.
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Zhu L, Jiang W, Tian S, Qu A, Wang H, Li X, Liao A, Jiang Y, Wang J. EP-1325: Phase I/II study of weekly cisplatin plus paclitaxel and radiotherapy for primary cervical cancer. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32575-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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91
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Chiricozzi A, Suárez-Fariñas M, Fuentes-Duculan J, Cueto I, Li K, Tian S, Brodmerkel C, Krueger JG. Increased expression of interleukin-17 pathway genes in nonlesional skin of moderate-to-severe psoriasis vulgaris. Br J Dermatol 2015; 174:136-45. [PMID: 26189551 DOI: 10.1111/bjd.14034] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/07/2015] [Indexed: 12/19/2022]
Abstract
BACKGROUND Psoriasis vulgaris is an inflammatory immune-mediated disease, with lesional skin characterized by sharply demarcated, erythematous scaly plaques. Uninvolved psoriatic skin appears clinically similar to normal skin. However, it has been hypothesized that inflammatory cytokines, e.g. interleukin (IL)-17, may affect any organ or tissue having a vascular supply; thus, distant uninvolved skin could be exposed to increased circulating IL-17. OBJECTIVES To establish comparative genomic profiles between noninvolved skin and normal skin, in particular, determining immune abnormalities in distant uninvolved skin. METHODS We performed a meta-analysis on three gene array studies, comparing the nonlesional (NL) psoriatic skin transcriptome with normal gene expression. We investigated immunological features of noninvolved skin, particularly linked to IL-17 signalling. RESULTS We detected 252 differentially expressed gene transcripts in uninvolved skin compared with normal skin; multiple immune-related genes, including IL-17-downstream genes, were upregulated. Increased expression of IL-17-signature genes (e.g. DEFB4 and S100A7) was associated with an increased number of CD3+, CD8+ and DC-LAMP+ cells in NL skin vs. normal controls. Inducible T-cell costimulator (ICOS) expression was detected only in a few T-cells within NL skin. CONCLUSIONS Our data described the genomic profile in NL skin, characterizing the immune activation that was mainly attributed to IL-17 signalling.
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Liu Y, Pi CY, Tian S. [Relationships between characteristics of ground bryophyte communities and environmental factors in urban area of Chongqing, China]. YING YONG SHENG TAI XUE BAO = THE JOURNAL OF APPLIED ECOLOGY 2015; 26:3145-3152. [PMID: 26995924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The present study focused on bryophyte species composition, species diversity and the relationship between bryophyte communities and environmental factors in urban area of Chongqing City, by using biodiversity indices and the canonical correspondence analysis (CCA), based on the data of 44 plots. The results revealed that 86 species belonging to 43 genera and 25 families were found in saxicolous bryophyte communities, while 46 species belonging to 28 genera and 22 families were found in terricolous ones. The diversity indices of both saxicolous and terricolous bryophyte communities from campuses were higher than those of parks, natural scenic resorts, Jinyunshan National Nature Reserve. TWINSPAN classified saxicolous and terricolous bryophyte communities into three and two groups, respectively. CCA results showed canopy density was the major environmental factor of saxicolous bryophyte communities influencing bryophyte distribution in parks and campuses, whereas altitude, relative humidity and human disturbance were the major environmental factors in natural scenic resorts and nature reserve. Soil pH, canopy density and human disturbance were the major environmental factors in terricolous bryophyte communities in parks and campuses, whereas altitude, relative humidity and water content of the soil were the major environmental factors in those of natural scenic resorts and nature reserve.
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Muwamba A, Amatya DM, Ssegane H, Chescheir GM, Appelboom T, Tollner EW, Nettles JE, Youssef MA, Birgand F, Skaggs RW, Tian S. Effects of Site Preparation for Pine Forest/Switchgrass Intercropping on Water Quality. JOURNAL OF ENVIRONMENTAL QUALITY 2015; 44:1263-1272. [PMID: 26437108 DOI: 10.2134/jeq2014.11.0505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A study was initiated to investigate the sustainability effects of intercropping switchgrass ( L.) in a loblolly pine ( L.) plantation. This forest-based biofuel system could possibly provide biomass from the perennial energy grass while maintaining the economics and environmental benefits of a forest managed for sawtimber. Operations necessary for successful switchgrass establishment and growth, such as site preparation, planting, fertilizing, mowing and baling, may affect hydrology and nutrient runoff. The objectives of this study were (i) to characterize the temporal effects of management on nutrient concentrations and loadings and (ii) to use pretreatment data to predict those treatment effects. The study watersheds (∼25 ha each) in the North Carolina Atlantic Coastal Plain were a pine/switchgrass intercropped site (D1), a midrotation thinned pine site with natural understory (D2), and a switchgrass-only site (D3). Rainfall, drainage, water table elevation, nitrogen (total Kjedahl N, NH-N, and NO-N), and phosphate were monitored for the 2007-2008 pretreatment and the 2009-2012 treatment periods. From 2010 to 2011 in site D1, the average NO-N concentration effects decreased from 0.18 to -0.09 mg L, and loads effects decreased from 0.86 to 0.49 kg ha. During the same period in site D3, the average NO-N concentration effects increased from 0.03 to 0.09 mg L, and loads effects increased from -0.26 to 1.24 kg ha. This study shows the importance of considering water quality effects associated with intensive management operations required for switchgrass establishment or other novel forest-based biofuel systems.
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Cao X, Ou W, Tian S, Wang C, Zhu Z, Wang J, Gou F, Yang D, Chen S. A new facility for studying plasma interacting with flowing liquid lithium surface. FUSION ENGINEERING AND DESIGN 2014. [DOI: 10.1016/j.fusengdes.2014.06.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Vecchione L, Gambino V, d'Ario G, Tian S, Schlicker A, Mainardi S, Diosdado B, Simon I, Delorenzi M, Lieftink C, Beijersbergen R, Tejpar S, Bernards R. 188 RANBP2 knock-down is synthetic lethal with BRAF V600E in colon cancer. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)70314-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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96
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Zhang XF, Zhang R, Huang L, Wang PX, Zhang Y, Jiang DS, Zhu LH, Tian S, Zhang XD, Li H. TRAF1 is a key mediator for hepatic ischemia/reperfusion injury. Cell Death Dis 2014; 5:e1467. [PMID: 25321474 PMCID: PMC4649517 DOI: 10.1038/cddis.2014.411] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Accepted: 07/21/2014] [Indexed: 12/14/2022]
Abstract
Tumor necrosis factor receptor-associated factor 1 (TRAF1), an adapter in signal transduction, is involved in immunity and in apoptotic processes in various cell types. However, little is known about its function and the molecular mechanism of its activation during liver injury. This study tested the hypothesis that TRAF1 is a mediator of cell injury after hepatic ischemia/reperfusion injury (I/R). In a mouse hepatic I/R injury model, we found that TRAF1 expression was highly induced. TRAF1 deficiency was liver protective, whereas sustained TRAF1 overexpression aggravated liver injury in response to hepatic I/R injury. Mechanistic studies demonstrated that a deficiency of TRAF1 in cultured hepatocytes led to the inhibition of NF-κB-mediated inflammatory responses, suppression of the ASK/JNK pro-death pathway and promotion of cellular regeneration capacity. In contrast, the converse occurred in hepatocyte-specific TRAF1 transgenic mice. TRAF1 activated the ASK1/JNK pathway and promoted hepatic injury. Our study demonstrates that TRAF1 is a crucial early mediator of hepatic I/R injury and suggests that TRAF1 may be a potential gene therapy target for the treatment of liver injury.
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Tian S, Goyal S, Haffty B, Chen T, Hsia H. The Role of Fibronectin on Spatial Organization in 3D Culture: A Model for Wound Healing After Radiation Therapy. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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98
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Xu X, Zhu H, Wang T, Sun Y, Ni P, Liu Y, Tian S, Amoah Barnie P, Shen H, Xu W, Xu H, Su Z. Exogenous High-Mobility Group Box 1 Inhibits Apoptosis and Promotes the Proliferation of Lewis Cells via RAGE/TLR4-Dependent Signal Pathways. Scand J Immunol 2014; 79:386-94. [PMID: 24673192 DOI: 10.1111/sji.12174] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Accepted: 03/25/2014] [Indexed: 01/16/2023]
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99
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Tian S, Wang J, Jiang Y. EP-1915: Percutaneous computed tomography-guided permanent 125Iimplantation for treating recurrent head and neck cancer. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)32033-8] [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]
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100
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Zhang Y, Tian S. Does D2 plus para-aortic nodal dissection surgery offer a better survival outcome compared to D2 surgery only for gastric cancer consistently? A definite result based on a hospital population of nearly two decades. Scand J Surg 2013; 102:251-7. [PMID: 24056132 DOI: 10.1177/1457496913491343] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND AND AIMS Curative resection is the treatment of choice for gastric cancer. Although it has been concluded that D2 lymphadenectomy plus para-aortic nodal dissection does not improve survival rate in curable gastric cancer, it is unclear whether D2 plus para-aortic nodal dissection has a benefit in some groups of patients. We conducted a retrospective study in our hospital, in which we compared D2 with D2 plus para-aortic nodal dissection lymphadenectomy for gastric cancer in subgroups of each clinical characteristic in terms of long-term survival after surgery. MATERIAL AND METHODS We selected 1792 patients who had undergone the treatment with curative intent between 1990 and 2007, 1344 in the D2 group and 448 in the D2 plus para-aortic nodal dissection group. Each procedure was verified by pathological analyses. The primary end points were 5-year overall survival. RESULTS AND CONCLUSIONS Median follow-up periods were 50 months for patients assigned to D2 group and 54 months for patients assigned to D2 plus para-aortic nodal dissection group. Overall 5-year survival was not significantly higher in patients assigned to D2 plus para-aortic nodal dissection surgery compared to those assigned to D2 surgery (31.2% (95% confidence interval: 19.8%-42.6%) vs 26.6% (95% confidence interval: 20.3%-32.9%); log-rank p = 0.433). D2 plus para-aortic nodal dissection surgery should only be used for curable gastric cancer of T3-4 and N2 stage and should not be used for T1 disease and total gastrectomy.
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