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Zhong LX, Ding BM, Liu DY, Jiang D, Yu B, Zhu BL, Zhang F, Ding L. [Determination of trace cobalt and tungsten in human urine by inductively coupled plasma mass spectrometry]. ZHONGHUA LAO DONG WEI SHENG ZHI YE BING ZA ZHI = ZHONGHUA LAODONG WEISHENG ZHIYEBING ZAZHI = CHINESE JOURNAL OF INDUSTRIAL HYGIENE AND OCCUPATIONAL DISEASES 2016; 34:386-388. [PMID: 27514431 DOI: 10.3760/cma.j.issn.1001-9391.2016.05.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
OBJECTIVE To establish a method to determine cobalt and tungsten in human urine by ICP-MS. METHODS Both Co and W were linear within 0.05~10.00 ng/ml with r>0.999. Spike experiment showed that both Co and W received good recovery rate, which were 90%~97%. Intra-assay precisions were 3.2%~5.1% for Co and 2.2%~4.1% for W, inter-assay precisions were 4.4%~5.2% for Co and 3.7%~4.5% for W. CONCLUSION The method by using ICP-MS to determine urine Co and W was fast, accurate and with low matrix effect. It could meet the requirement in GBZ/T 210.5-2008.
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Zhong LX, Ding BM, Jiang D, Liu DY, Yu B, Zhu BL, Ding L. [Determination of trace cobalt in human urine by graphite furnace atomic absorption spectrometr]. ZHONGHUA LAO DONG WEI SHENG ZHI YE BING ZA ZHI = ZHONGHUA LAODONG WEISHENG ZHIYEBING ZAZHI = CHINESE JOURNAL OF INDUSTRIAL HYGIENE AND OCCUPATIONAL DISEASES 2016; 34:384-386. [PMID: 27514430 DOI: 10.3760/cma.j.issn.1001-9391.2016.05.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
OBJECTIVE To establish a method to determine cobalt in human urine by graphite furnace atomic absorption spectrometry. METHODS Urine with 2% nitric acid diluted two-fold, to quantify the curve, graphite furnace atomic absorption spectrometric detection. RESULTS Co was linear within 2.5~40.0 ng/ml with r>0.999. Spike experiment showed that Co received good recovery rate, which was 90.8%~94.8%. Intra-assay precisions were 3.2%~5.1% for Co, inter-assay precisions were 4.4%~5.2% for Co. CONCLUSION The method by using graphite furnace atomic absorption spectrometr to determine urine Co was fast, accurate and with low matrix effect. It could meet the requirement in GBZ/T 210.5-2008.
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Li R, Fan Z, Ding L, Mei W, Li X, Chen H, Luo Q, Fu N, Ouyang J, Mao Y, Liu Y, Dang S, Hu J, Zhang J, Deng J, Yu S, Zhu Y, Chen Y, Xie Y. EP-1741: MRI assess hypnosis control respiratory motion applied to radiotherapy for lung cancer patients. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32992-9] [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]
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Zhao W, Hao M, Wang Y, Feng N, Wang Z, Wang W, Wang J, Ding L. Association between folate status and cervical intraepithelial neoplasia. Eur J Clin Nutr 2016; 70:837-42. [PMID: 27026426 PMCID: PMC4940925 DOI: 10.1038/ejcn.2016.35] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 02/15/2016] [Accepted: 02/17/2016] [Indexed: 12/03/2022]
Abstract
Background/Objectives: To investigate the effect of folate status on cervical intraepithelial neoplasia (CIN) progression and its relationship with high-risk human papillomavirus (hrHPV). Subjects/Methods: We evaluated 20 000 sexually active women aged <65 years in Yangqu County by using a questionnaire; the subjects were also screened using the ThinPrep cytologic test (TCT). Patients with abnormal TCT results (other than glandular cell abnormalities) who were willing to provide informed consent were further diagnosed using colposcopy and histopathological examination. We investigated 247 cases of low-grade cervical squamous intraepithelial lesions (LSIL), 125 cases of high-grade cervical squamous intraepithelial lesions (HSIL) and 877 controls. A 24-item food frequency questionnaire was filled out by the investigator to estimate the consumption of dietary folate. Positivity for hrHPV from residual exfoliated cervical cells was tested; serum folate was also measured. Results: The hrHPV infection rate in HSIL patients (77.6%) was higher than that in LSIL (33.2%) and control (32.0%) patients. Dietary folate intakes in controls, LSIL and HSIL were 306.9±176.6, 321.8±168.0 and 314.7±193.8 μg/kcal, respectively. The levels of serum folate in controls, LSIL and HSIL were 18.2±7.9, 15.9±7.1 and 14.3±7.5 nmol/l, respectively. Increased CIN correlated with higher rates of hrHPV infection and lower levels of serum folate. Conclusions: Low levels of serum folate may increase the risk of CIN progression. Furthermore, potential synergy may exist between low serum folate levels and hrHPV infection to promote CIN development.
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Jones KB, Barrott JJ, Xie M, Haldar M, Jin H, Zhu JF, Monument MJ, Mosbruger TL, Langer EM, Randall RL, Wilson RK, Cairns BR, Ding L, Capecchi MR. The impact of chromosomal translocation locus and fusion oncogene coding sequence in synovial sarcomagenesis. Oncogene 2016; 35:5021-32. [PMID: 26947017 PMCID: PMC5014712 DOI: 10.1038/onc.2016.38] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 12/14/2015] [Accepted: 01/11/2016] [Indexed: 02/07/2023]
Abstract
Synovial sarcomas are aggressive soft-tissue malignancies that express chromosomal translocation-generated fusion genes, SS18-SSX1 or SS18-SSX2 in most cases. Here, we report a mouse sarcoma model expressing SS18-SSX1, complementing our prior model expressing SS18-SSX2. Exome sequencing identified no recurrent secondary mutations in tumors of either genotype. Most of the few mutations identified in single tumors were present in genes that were minimally or not expressed in any of the tumors. Chromosome 6, either entirely or around the fusion gene expression locus, demonstrated a copy number gain in a majority of tumors of both genotypes. Thus, by fusion oncogene coding sequence alone, SS18-SSX1 and SS18-SSX2 can each drive comparable synovial sarcomagenesis, independent from other genetic drivers. SS18-SSX1 and SS18-SSX2 tumor transcriptomes demonstrated very few consistent differences overall. In direct tumorigenesis comparisons, SS18-SSX2 was slightly more sarcomagenic than SS18-SSX1, but equivalent in its generation of biphasic histologic features. Meta-analysis of human synovial sarcoma patient series identified two tumor-gentoype-phenotype correlations that were not modeled by the mice, namely a scarcity of male hosts and biphasic histologic features among SS18-SSX2 tumors. Re-analysis of human SS18-SSX1 and SS18-SSX2 tumor transcriptomes demonstrated very few consistent differences, but highlighted increased native SSX2 expression in SS18-SSX1 tumors. This suggests that the translocated locus may drive genotype-phenotype differences more than the coding sequence of the fusion gene created. Two possible roles for native SSX2 in synovial sarcomagenesis are explored. Thus, even specific partial failures of mouse genetic modeling can be instructive to human tumor biology.
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Lu A, Fang Y, Du X, Li Y, Cai Z, Yu K, Zhao L, Wang B, Wu J, Cheng Y, Zuo Y, Jia Y, Tan F, Ding L, Lu J, Zhang L, Huang X. Efficacy, safety and pharmacokinetics of clofarabine in Chinese pediatric patients with refractory or relapsed acute lymphoblastic leukemia: a phase II, multi-center study. Blood Cancer J 2016; 6:e400. [PMID: 26918364 PMCID: PMC4771971 DOI: 10.1038/bcj.2016.8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
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Adare A, Aidala C, Ajitanand N, Akiba Y, Akimoto R, Alexander J, Alfred M, Aoki K, Apadula N, Aramaki Y, Asano H, Atomssa E, Awes T, Azmoun B, Babintsev V, Bai M, Bai X, Bandara N, Bannier B, Barish K, Bathe S, Baublis V, Baumann C, Baumgart S, Bazilevsky A, Beaumier M, Beckman S, Belmont R, Berdnikov A, Berdnikov Y, Black D, Blau D, Bok J, Boyle K, Brooks M, Bryslawskyj J, Buesching H, Bumazhnov V, Butsyk S, Campbell S, Chen CH, Chi C, Chiu M, Choi I, Choi J, Choi S, Christiansen P, Chujo T, Cianciolo V, Citron Z, Cole B, Cronin N, Crossette N, Csanád M, Csörgő T, Danley T, Datta A, Daugherity M, David G, DeBlasio K, Dehmelt K, Denisov A, Deshpande A, Desmond E, Ding L, Dion A, Diss P, Do J, D’Orazio L, Drapier O, Drees A, Drees K, Durham J, Durum A, Engelmore T, Enokizono A, En’yo H, Esumi S, Eyser K, Fadem B, Feege N, Fields D, Finger M, Finger M, Fleuret F, Fokin S, Frantz J, Franz A, Frawley A, Fukao Y, Fusayasu T, Gainey K, Gal C, Gallus P, Garg P, Garishvili A, Garishvili I, Ge H, Giordano F, Glenn A, Gong X, Gonin M, Goto Y, Granier de Cassagnac R, Grau N, Greene S, Grosse Perdekamp M, Gu Y, Gunji T, Guragain H, Hachiya T, Haggerty J, Hahn K, Hamagaki H, Hamilton H, Han S, Hanks J, Hasegawa S, Haseler T, Hashimoto K, Hayano R, He X, Hemmick T, Hester T, Hill J, Hollis R, Homma K, Hong B, Hoshino T, Hotvedt N, Huang J, Huang S, Ichihara T, Ikeda Y, Imai K, Imazu Y, Inaba M, Iordanova A, Isenhower D, Isinhue A, Ivanishchev D, Jacak B, Jeon S, Jezghani M, Jia J, Jiang X, Johnson B, Joo E, Joo K, Jouan D, Jumper D, Kamin J, Kanda S, Kang B, Kang J, Kang J, Kapustinsky J, Kawall D, Kazantsev A, Key J, Khachatryan V, Khandai P, Khanzadeev A, Kihara K, Kijima K, Kim C, Kim D, Kim D, Kim EJ, Kim G, Kim HJ, Kim M, Kim YJ, Kim Y, Kimelman B, Kistenev E, Kitamura R, Klatsky J, Kleinjan D, Kline P, Koblesky T, Kofarago M, Komkov B, Koster J, Kotchetkov D, Kotov D, Krizek F, Kurita K, Kurosawa M, Kwon Y, Lacey R, Lai Y, Lajoie J, Lebedev A, Lee D, Lee G, Lee J, Lee K, Lee K, Lee S, Lee S, Leitch M, Leitgab M, Lewis B, Li X, Lim S, Liu M, Lynch D, Maguire C, Makdisi Y, Makek M, Manion A, Manko V, Mannel E, Maruyama T, McCumber M, McGaughey P, McGlinchey D, McKinney C, Meles A, Mendoza M, Meredith B, Miake Y, Mibe T, Mignerey A, Miller A, Milov A, Mishra D, Mitchell J, Miyasaka S, Mizuno S, Mohanty A, Mohapatra S, Montuenga P, Moon T, Morrison D, Moskowitz M, Moukhanova T, Murakami T, Murata J, Mwai A, Nagae T, Nagamiya S, Nagashima K, Nagle J, Nagy M, Nakagawa I, Nakagomi H, Nakamiya Y, Nakamura K, Nakamura T, Nakano K, Nattrass C, Netrakanti P, Nihashi M, Niida T, Nishimura S, Nouicer R, Novák T, Novitzky N, Nyanin A, O’Brien E, Ogilvie C, Oide H, Okada K, Orjuela Koop J, Osborn J, Oskarsson A, Ozaki H, Ozawa K, Pak R, Pantuev V, Papavassiliou V, Park I, Park J, Park S, Park S, Pate S, Patel L, Patel M, Peng JC, Perepelitsa D, Perera G, Peressounko D, Perry J, Petti R, Pinkenburg C, Pinson R, Pisani R, Purschke M, Qu H, Rak J, Ramson B, Ravinovich I, Read K, Reynolds D, Riabov V, Riabov Y, Richardson E, Rinn T, Riveli N, Roach D, Rolnick S, Rosati M, Rowan Z, Rubin J, Ryu M, Sahlmueller B, Saito N, Sakaguchi T, Sako H, Samsonov V, Sarsour M, Sato S, Sawada S, Schaefer B, Schmoll B, Sedgwick K, Seele J, Seidl R, Sekiguchi Y, Sen A, Seto R, Sett P, Sexton A, Sharma D, Shaver A, Shein I, Shibata TA, Shigaki K, Shimomura M, Shoji K, Shukla P, Sickles A, Silva C, Silvermyr D, Singh B, Singh C, Singh V, Skolnik M, Slunečka M, Snowball M, Solano S, Soltz R, Sondheim W, Sorensen S, Sourikova I, Stankus P, Steinberg P, Stenlund E, Stepanov M, Ster A, Stoll S, Stone M, Sugitate T, Sukhanov A, Sumita T, Sun J, Sziklai J, Takahara A, Taketani A, Tanaka Y, Tanida K, Tannenbaum M, Tarafdar S, Taranenko A, Tennant E, Tieulent R, Timilsina A, Todoroki T, Tomášek M, Torii H, Towell C, Towell M, Towell R, Towell R, Tserruya I, van Hecke H, Vargyas M, Vazquez-Zambrano E, Veicht A, Velkovska J, Vértesi R, Virius M, Vrba V, Vznuzdaev E, Wang X, Watanabe D, Watanabe K, Watanabe Y, Watanabe Y, Wei F, Whitaker S, White A, Wolin S, Woody C, Wysocki M, Xia B, Xue L, Yalcin S, Yamaguchi Y, Yanovich A, Yokkaichi S, Yoo J, Yoon I, You Z, Younus I, Yu H, Yushmanov I, Zajc W, Zelenski A, Zhou S, Zou L. Inclusive cross section and double-helicity asymmetry forπ0production at midrapidity inp+pcollisions ats=510 GeV. Int J Clin Exp Med 2016. [DOI: 10.1103/physrevd.93.011501] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Wu Q, Mao J, Wei C, Fu S, Law R, Ding L, Yu B, Jia B, Yang C. Hybrid BF–PSO and fuzzy support vector machine for diagnosis of fatigue status using EMG signal features. Neurocomputing 2016. [DOI: 10.1016/j.neucom.2015.06.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Wang K, Yang Y, Wang L, Ma T, Shang H, Ding L, Han J, Qiu Q. Different gene expressions between cattle and yak provide insights into high-altitude adaptation. Anim Genet 2015; 47:28-35. [PMID: 26538003 DOI: 10.1111/age.12377] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/10/2015] [Indexed: 01/03/2023]
Abstract
DNA sequence variation has been widely reported as the genetic basis for adaptation, in both humans and other animals, to the hypoxic environment experienced at high altitudes. However, little is known about the patterns of gene expression underlying such hypoxic adaptations. In this study, we examined the differences in the transcriptomes of four organs (heart, kidney, liver and lung) between yak and cattle, a pair of closely related species distributed at high and low altitudes respectively. Of the four organs examined, heart shows the greatest differentiation between the two species in terms of gene expression profiles. Detailed analyses demonstrated that some genes associated with the oxygen supply system and the defense systems that respond to threats of hypoxia are differentially expressed. In addition, genes with significantly differentiated patterns of expression in all organs exhibited an unexpected uniformity of regulation along with an elevated frequency of nonsynonymous substitutions. This co-evolution of protein sequences and gene expression patterns is likely to be correlated with the optimization of the yak metabolic system to resist hypoxia.
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Manda KR, Tripathi P, Hsi AC, Ning J, Ruzinova MB, Liapis H, Bailey M, Zhang H, Maher CA, Humphrey PA, Andriole GL, Ding L, You Z, Chen F. NFATc1 promotes prostate tumorigenesis and overcomes PTEN loss-induced senescence. Oncogene 2015; 35:3282-92. [PMID: 26477312 PMCID: PMC5012433 DOI: 10.1038/onc.2015.389] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 08/25/2015] [Accepted: 09/08/2015] [Indexed: 02/06/2023]
Abstract
Despite recent insights into prostate cancer (PCa)-associated genetic changes, full understanding of prostate tumorigenesis remains elusive due to complexity of interactions among various cell types and soluble factors present in prostate tissue. We found upregulation of Nuclear Factor of Activated T Cells c1 (NFATc1) in human PCa and cultured PCa cells, but not in normal prostates and non-tumorigenic prostate cells. To understand the role of NFATc1 in prostate tumorigenesis in situ, we temporally and spatially controlled the activation of NFATc1 in mouse prostate and showed that such activation resulted in prostatic adenocarcinoma with features similar to those seen in human PCa. Our results indicate that the activation of a single transcription factor, NFATc1 in prostatic luminal epithelium to PCa can affect expression of diverse factors in both cells harboring the genetic changes and in neighboring cells through microenvironmental alterations. In addition to the activation of oncogenes c-MYC and STAT3 in tumor cells, a number of cytokines and growth factors, such as IL1β, IL6, and SPP1 (Osteopontin, a key biomarker for PCa), were upregulated in NFATc1-induced PCa, establishing a tumorigenic microenvironment involving both NFATc1 positive and negative cells for prostate tumorigenesis. To further characterize interactions between genes involved in prostate tumorigenesis, we generated mice with both NFATc1 activation and Pten inactivation in prostate. We showed that NFATc1 activation led to acceleration of Pten-null–driven prostate tumorigenesis by overcoming the PTEN loss–induced cellular senescence through inhibition of p21 activation. This study provides direct in vivo evidence of an oncogenic role of NFATc1 in prostate tumorigenesis and reveals multiple functions of NFATc1 in activating oncogenes, in inducing proinflammatory cytokines, in oncogene addiction, and in overcoming cellular senescence, which suggests calcineurin-NFAT signaling as a potential target in preventing PCa.
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Cheung C, Virani S, Davis M, Hawkins N, Munt B, Ding L, Ignaszewski A, Toma M. TEMPORAL TRENDS IN HEART FAILURE Outcomes FOLLOWING INDEX HF HOSPITALIZATION IN BRITISH COLUMBIA. Can J Cardiol 2015. [DOI: 10.1016/j.cjca.2015.07.568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Ramanathan K, Abel J, Fung A, Fradet G, Della-Siega A, Wong D, Ding L, Park J, Gao M, Hennessy C, Taylor C, Farkouh M. TRANSLATING CLINICAL TRIAL RESULTS INTO CLINICAL PRACTICE FOR PATIENTS WITH DIABETES AND MULTIVESSEL CORONARY ARTERY DISEASE IN BRITISH COLUMBIA: A POPULATION-BASED STUDY. Can J Cardiol 2015. [DOI: 10.1016/j.cjca.2015.07.141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Liu WW, Wang HX, Yu W, Bi XY, Chen JY, Chen LZ, Ding L, Han DM, Guo ZK, Lei YX. Treatment of silicosis with hepatocyte growth factor-modified autologous bone marrow stromal cells: a non-randomized study with follow-up. GENETICS AND MOLECULAR RESEARCH 2015; 14:10672-81. [PMID: 26400297 DOI: 10.4238/2015.september.9.7] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Pulmonary silicosis is an irreversible and untreatable disease that is characterized by interstitial lesions and perpetual fibrosis in the lungs. This study was performed to determine whether mesenchymal stem cells (MSCs) and hepatocyte growth factor (HGF) could exhibit therapeutic effects on human silicosis. This non-randomized uncontrolled trial comprised four patients with pulmonary silicosis who had developed lung fibrosis and received autologous bone marrow MSCs previously transfected by a vector containing human HGF cDNA (MSCs/HGF). MSCs/HGF were intravenously administered weekly for three consecutive weeks at a dose of 2 x 10(6) cells/kg. Pulmonary function, high kilo-voltage chest X-ray radiography, computed tomography (CT) scan, and peripheral blood lymphocyte subset and serum IgG concentrations were evaluated after cell therapy. The treatment was found to be generally safe. Symptoms such as cough and chest distress gradually ameliorated at six months post-therapy, accompanied by the significant improvement of pulmonary function. The ratios of the peripheral CD4- and CD8- positive cell concentrations were increased (P < 0.05). Furthermore, the serum IgG levels in these patients were decreased and reached the normal range (P < 0.05). CT scans showed partial absorption of the nodular and reticulonodular lesions in the lungs during follow-up of at least 12 months. The effectiveness of this novel regimen observed in these patients suggests that a placebo-controlled clinical trial needs to be developed. This study carries trial registration No. NCT01977131 (ClinicalTrials.gov).
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Miloslavsky EM, Specks U, Merkel PA, Seo P, Spiera R, Langford CA, Hoffman GS, Kallenberg CGM, St Clair EW, Tchao NK, Ding L, Iklé D, Villareal M, Lim N, Brunetta P, Fervenza FC, Monach PA, Stone JH. Outcomes of nonsevere relapses in antineutrophil cytoplasmic antibody-associated vasculitis treated with glucocorticoids. Arthritis Rheumatol 2015; 67:1629-36. [PMID: 25776953 DOI: 10.1002/art.39104] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Accepted: 03/03/2015] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Nonsevere relapses are more common than severe relapses in antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV), but their clinical course and treatment outcomes remain largely unexamined. We undertook this study to analyze the outcomes of patients with nonsevere relapses in the Rituximab in ANCA-Associated Vasculitis (RAVE) trial who were treated with prednisone according to a prespecified protocol. METHODS RAVE was a randomized, double-blind, placebo-controlled trial comparing rituximab (RTX) to cyclophosphamide (CYC) followed by azathioprine (AZA) for induction of remission. Patients who experienced nonsevere relapses between months 1 and 18 were treated with a prednisone increase without a concomitant change in their nonglucocorticoid immunosuppressants, followed by a taper. RESULTS Forty-four patients with a first nonsevere relapse were analyzed. In comparison to the 71 patients who maintained relapse-free remission over 18 months, these patients were more likely to have proteinase 3-ANCAs, diagnoses of granulomatosis with polyangiitis (Wegener's), and a history of relapsing disease at baseline. A prednisone increase led to remission in 35 patients (80%). However, only 13 patients (30%) were able to maintain second remissions through the followup period (mean 12.5 months); 31 patients (70%) had a second disease relapse, 14 of them with severe disease. The mean time to second relapse was 9.4 months (4.7 months in the group treated with RTX versus 13.7 months in the group treated with CYC/AZA; P < 0.01). Patients who experienced nonsevere relapses received more glucocorticoids than those who maintained remission (6.7 grams versus 3.8 grams; P < 0.01). CONCLUSION Treatment of nonsevere relapses in AAV with an increase in glucocorticoids is effective in restoring temporary remission in the majority of patients, but recurrent relapses within a relatively short interval remain common. Alternative treatment approaches are needed for this important subset of patients.
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Ding L, Tong N, Feng XM, Chen D, Wang HS, Wang Y, Li Y, Zhu GQ, Zhou YB. Adipose afferent reflex response to insulin is mediated by melanocortin 4 type receptors in the paraventricular nucleus in insulin resistance rats. Acta Physiol (Oxf) 2015; 214:450-66. [PMID: 25846948 DOI: 10.1111/apha.12502] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 11/27/2014] [Accepted: 04/01/2015] [Indexed: 12/19/2022]
Abstract
BACKGROUND Adipose afferent reflex (AAR) contributes to sympathetic activation and hypertension. Paraventricular nucleus (PVN) plays an important role in AAR and sympathetic outflow. The aim of the present study was to determine whether PVN mediates AAR response to insulin in a rat model of insulin resistance (IR). METHODS Male Sprague-Dawley rats were randomly divided into Control and IR groups. Insulin resistance was induced by supplementing fructose (125 g L(-1) , 12 weeks) in the drinking water. Renal sympathetic nerve activity (RSNA) and mean arterial pressure (MAP) were recorded in anesthetized rats. AAR was evaluated by the RSNA and MAP responses to injection of capsaicin into four sites of right inguinal white adipose tissue. RESULTS Rats in IR group showed a rise in plasma noradrenaline (NE), glucose, insulin and triglyceride levels, left ventricular weight, systolic blood pressure, homeostasis model assessment of insulin resistance (HOMA-IR) and PVN glucose and insulin levels, melanocortin 4 type receptors (MC4Rs) protein expression, but not MC3Rs and insulin receptors. Compared with Control group, AAR in IR group was significantly enhanced, which contributed to the elevation of NE level; and insulin microinjection into the PVN or the third ventricle significantly strengthened AAR, which was attenuated by pre-treatment with MC4Rs antagonist HS024 and anti-insulin affibody, respectively, but not insulin receptors antagonist S961. CONCLUSION The enhanced AAR participates in sympathetic activation in IR, which can be strengthened by PVN insulin. PVN MC4Rs mediate the AAR response to insulin in IR, but not MC3Rs and insulin receptors.
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Xin X, Wu Y, Liu X, Sun C, Geng T, Ding L. Pharmacokinetics of Oral Combination Contraceptive Drugs Containing Ethinyl Estradiol and Levonorgestrel in Healthy Female Chinese Volunteers. Drug Res (Stuttg) 2015; 66:100-6. [PMID: 26037079 DOI: 10.1055/s-0035-1554631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
BACKGROUND AND OBJECTIVE A new combination contraceptive tablet containing 0.02 mg ethinyl estradiol (EE) and 0.10 mg levonorgestrel (LNG) with potential advantages has been developed in China. This study was aimed to describe the pharmacokinetic characteristics of this new combination contraceptive tablet in female Chinese volunteers. METHODS This study was designed as phase I, open-label, and one-sequence clinical trial. 12 healthy nonpregnant female Chinese volunteers received a single dose (1 tablet) and multiple dose (1 tablet per day) administration for 21 consecutive days under fasting condition. Blood samples were analyzed with 2 validated LC-MS/MS methods for EE and LNG, respectively. RESULTS AND CONCLUSION After the single dose administration, the C max of EE and LNG were 44.76±18.64 pg/mL and 2.256±1.008 ng/mL, respectively. The steady-state condition of EE was achieved on the 6(th) day after the beginning of the multiple dose administration, while the steady-state condition of LNG was achieved on the 21(st) day. For EE, the mean MRT 0-72 and t 1/2 increased by 40.2 and 30.6%, meanwhile the mean Cl/F and Vd/F decreased by 18.5 and 29.1%, respectively from Day 1 to Day 24. For LNG, the mean MRT 0-72 increased by 27.1%, while the mean Cl/F and Vd/F decreased by 62.4 and 86.3%, respectively from Day 1 to Day 24. The t 1/2 remained unchanged for LNG. The exposure of LNG significantly increased with repeated dosing, but that of EE just slightly increased.
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Zeng QM, Liu DC, Zhang XC, Wu JP, Ding L, Meng DH, Zhang J. Estrogen deficiency inducing shifted cytokines profile in bone marrow stromal cells inhibits Treg cells function in OVX mice. Cell Mol Biol (Noisy-le-grand) 2015; 61:64-68. [PMID: 26025405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Accepted: 05/08/2015] [Indexed: 06/04/2023]
Abstract
The study aims to reveal the effect of estrogen deficiency on Treg cells population in bone marrow in the development of osteoclastogenis with comparing the differences about Treg cells phenotypes and cytokines related with the homeostasis and functions maintenance of Treg cells in bone marrow in OVX mice and health control group. Wide—type C57BL/6 mice were operated OVX to mimic estrogen deficiency in PMO women. Treg cells population and their surface markers expressions were detected by flow cytometry. Cytokines profiles in bone marrow with examined by real—time PCR and ELISA analysis. Signal pathways and key modulators responsible to inflammatory cytokines expressions in bone marrow stromal cells were also detected with using western blotting. Estrogen deficiency in OVX mice decreased Treg cells and their functions, and cytokines profile in bone marrow were found shifted in bone marrow when compared with control group. Consistent to these observations, signal pathways in bone marrow stromal cells were reported altered by estrogen deficiency in our model. Estrogen deficiency effects Treg cells population and their functions in OVX mice with altering cytokines profile in bone marrow stromal cells.
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Zhang XL, Chen XD, Zhao QZ, Ding L. The research on the dispersion effect improvement for nano-copper in erythritol. ACTA ACUST UNITED AC 2015. [DOI: 10.1179/1432891715z.0000000001359] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Gan Y, Dang N, Qu Z, Shi R, Ding L, Wang L, Pang S. GLP-1-Exendin-4/IgG4 (Fc) fusion protein as a novel drug for diabetes treatment. Exp Clin Endocrinol Diabetes 2015; 123:371-5. [PMID: 25962403 DOI: 10.1055/s-0035-1548797] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
In this paper, we aimed to look for a potent long acting GLP-1 receptor agonist for diabetes treatment. In this work, we constructed the eukaryotic expression vector of GLP-1-Exendin-4/IgG4 (Fc)-pOptiVEC™-TOPO(®) and then transfected it into Chinese hamster ovary DG44 (CHO/DG44) cells using liposome method. Then the beta-cell line INS-1 cells were treated with purified GLP-1-Exendin-4/IgG4 (Fc) fusion protein (0.01, 0.1, 1.0 mM respectively) and randomly assigned to 2 groups, each group were then grown in KRB buffer in the presence of 2.8 mM or 16.8 mM glucose for 2 h separately. In addition, single dose of fusion protein was intraperitoneally injected into male CD1 mice for pharmacokinetic study. Besides, multiple low doses of streptozotozin (STZ) induced diabetes mice were used to evaluate the effect of fusion protein for anti-diabetes in male CD1 mice. GLP-1-Exendin-4/IgG4 (Fc) had stimulatory effect on insulin secretion glucose-dependently from INS-1 cells in a dose-dependent manner. Pharmacokinetic studies showed that the GLP-1 level increased significantly after injecting fusion protein and maintained a higher level for 200 h. Besides, multiple-low-dose STZ-induced diabetes mice which received intraperitoneal injections of fusion protein did not show sign of diabetes. Our results indicated that GLP-1-Exendin-4/IgG4 (Fc) fusion protein retained native GLP-1 activities and had effect on long-term glucose regulation. All the results suggest that this fusion protein may serve as a potent long acting GLP-1 receptor agonist.
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Tian YG, Qin SM, Ding L. THIN-LAYER CHROMATOGRAPHY IDENTIFICATION FOR RHUBARB AND PHELLODENDRI AMURENSIS CORTEX IN SHUANG-BAI CATAPLASM AND STUDY OF SKIN IRRITATION ASSAY. J BIOL REG HOMEOS AG 2015; 29:479-484. [PMID: 26122240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This paper aimed to raise a thin-layer chromatography (TLC) identification method for rhubarb and Phellodendri Amurensis Cortex and inspected skin irritation induced by them. It applied the TLC identification for Rhubarb and Phellodendri Amurensis Cortex in Shuang-bai cataplasm prescription. In this study six rabbits were divided into two groups to observe the skin irritation from Shuang-bai cataplasm on intact and defected skin. Another 36 were randomly divided into 6 groups to observe the acute toxicity from Shuang-bai cataplasm on intact and defected skin. Also 30 guinea pigs were divided into 3 groups to observe skin allergy to Shuang-bai cataplasm. The results showed that the average weight of the group of intact-skin rabbits was 2.026±0.10 kg and 2.427±0.023 kg after medication; the average weight of the group of defected-skin rabbits was 2.170±0.05 kg and 2.540±0.15 kg after medication; Shuang-bai cataplasm produced no irritation on intact or defected rabbit skin, no acute toxicity in rabbits and no allergy on the skin of guinea pigs. The skin allergy rate on guinea pigs of the medication group was 0 at each time quantum. Therefore, it can be concluded that this preparation produces no extreme skin irritation for rabbits, guinea pigs or human beings, and it can be safely put into practice.
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Hall RP, Fairley J, Woodley D, Werth VP, Hannah D, Streilein RD, McKillip J, Okawa J, Rose M, Keyes-Elstein LL, Pinckney A, Overington A, Wedgwood J, Ding L, Welch B. A multicentre randomized trial of the treatment of patients with pemphigus vulgaris with infliximab and prednisone compared with prednisone alone. Br J Dermatol 2015; 172:760-8. [PMID: 25123295 DOI: 10.1111/bjd.13350] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/07/2014] [Indexed: 11/29/2022]
Abstract
BACKGROUND Pemphigus vulgaris (PV) is a blistering disease and tumour necrosis factor-α has a role in its pathogenesis. OBJECTIVES To evaluate the safety of infliximab (IFX) with prednisone compared with prednisone alone in the treatment of PV. In addition, treatment response was assessed and mechanistic studies were performed. METHODS Subjects with PV who had ongoing disease activity while being maintained on prednisone were randomized to receive either IFX or placebo in addition to prednisone. Response status and immunoglobulin (Ig) G anti-desmoglein (Dsg)1 and Dsg3 antibodies were assessed at 18 and 26 weeks. RESULTS Ten subjects were randomized to each group. There were no safety signals during the course of the study. At week 18, one subject in each group had responded. At week 26, three IFX-treated subjects vs. none in the placebo group had responded (P = 0·21). At weeks 18 and 26, the median IgG anti-Dsg1 and anti-Dsg3 levels were lower in the IFX-treated patients [IgG anti-Dsg-1 (week 18, P = 0·035; week 26, P = 0·022); IgG anti-Dsg3 (week 18, P = 0·035; week, 26 P = 0·05)]. CONCLUSIONS This study is limited by the relatively small sample size. There was no significant difference between study arms in the proportion of subjects with treatment-related adverse events > grade 3. IFX therapy was not shown to be effective for the treatment of patients with PV in this randomized, placebo-controlled trial, although IFX treatment may be associated with a decrease in anti-Dsg1 and Dsg3 antibodies.
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Ding L, Zhang J, Yu S, Sheng L. Investigation of genes in chronic and acute morphine-treated mice using microarray datasets. GENETICS AND MOLECULAR RESEARCH 2015; 14:10193-205. [DOI: 10.4238/2015.august.28.3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Ding L, Wang XQ, Zhang J, Mu ZL, Zhou XX, Liu PS. Underlying mechanism of 2-methoxyestradiol-induced apoptosis and growth arrest in SKOV3 human ovarian cancer cells. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2015; 19:2084-2090. [PMID: 26125273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE In this study, we sought to investigate the effects of 2-methoxyestradiol (2-ME) on cisplatin-induced apoptosis and growth inhibition in SKOV3 ovarian cancer cells. MATERIALS AND METHODS Cells were treated with 2-ME, carboplatin, or both, the control group, and cell viability and growth inhibition assays were performed using the MTT method. Apoptosis was detected by flow cytometry analysis. Reverse transcription polymerase chain reaction and western blotting were used to monitor the mRNA and protein expression of the pro-apoptotic genes bax and caspase-3 and the anti-apoptotic gene bcl-2. The phosphorylation of Bcl-2 protein was monitored by western blotting. RESULTS Cell viability was inhibited by all three treatments in a time-dependent manner. Importantly, the combination treatment resulted in significantly reduced cell growth compared with the other groups. The mRNA and protein expression of Bax and caspase-3 were increased in the combination treatment group, and the expression of Bcl-2 was decreased in the combination treatment group as compared with the other two groups. The ratio of bax to Bcl-2 mRNA in the combination treatment group was higher than that in the carboplatin-treated group. Finally, phosphorylation of Bcl-2 protein was increased stronger in the combination treatment group compared with the carboplatin-treated group. CONCLUSIONS 2-ME promoted the growth inhibitory and apoptosis-inducing effects of platinum-based agents in SKOV3 ovarian cancer cells. The mechanism mediating this effect may be related to the phosphorylation of Bcl-2 protein, which reduces the formation of dimers and, thereby, increases apoptosis. Moreover, 2-ME promoted the mRNA and protein expression of Bax, thereby, increasing the Bax/Bcl-2 expression ratio and activating the mitochondrial apoptosis pathway.
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Chen B, Wang R, Chen Y, Zhu Y, Ding L, Wen Y. Association between HLA-DRB1 alleles and tuberculosis: a meta-analysis. GENETICS AND MOLECULAR RESEARCH 2015; 14:15859-15868. [DOI: 10.4238/2015.december.1.37] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
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175
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Sun HJ, Zhou H, Feng XM, Gao Q, Ding L, Tang CS, Zhu GQ, Zhou YB. Superoxide anions in the paraventricular nucleus mediate cardiac sympathetic afferent reflex in insulin resistance rats. Acta Physiol (Oxf) 2014; 212:267-82. [PMID: 25307720 DOI: 10.1111/apha.12405] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Revised: 05/26/2014] [Accepted: 10/06/2014] [Indexed: 12/14/2022]
Abstract
AIM Cardiac sympathetic afferent reflex (CSAR) participates in sympathetic over-excitation. Superoxide anions and angiotensin II (Ang II) mechanisms are associated with sympathetic outflow and CSAR in the paraventricular nucleus (PVN). This study was designed to investigate whether PVN superoxide anions mediate CSAR and Ang II-induced CSAR enhancement response in fructose-induced insulin resistance (IR) rats. METHODS CSAR was evaluated with the changes of renal sympathetic nerve activity (RSNA) and mean arterial pressure (MAP) responses to the epicardial application of capsaicin (CAP) in anaesthetized rats. RESULTS Compared with Control rats, IR rats showed that CSAR, PVN NAD(P)H oxidase activity, superoxide anions, malondialdehyde (MDA), Ang II and AT1 receptor levels were significantly increased, whereas PVN superoxide dismutase (SOD) and catalase (CAT) activities were decreased. In Control and IR rats, PVN microinjection of superoxide anions scavengers tempol, tiron and PEG-SOD (an analogue of endogenous superoxide dismutase) or inhibition of PVN NAD(P)H oxidase with apocynin caused significant reduction of CSAR, respectively, but DETC (a superoxide dismutase inhibitor) strengthened the CSAR. PVN pre-treatment with tempol abolished, whereas DETC potentiated, Ang II-induced CSAR enhancement response. Moreover, PVN pre-treatment with tempol or losartan prevented superoxide anions increase caused by Ang II in IR rats. CONCLUSION PVN superoxide anions mediate CSAR and Ang II-induced CSAR response in IR rats. In IR state, increased NAD(P)H oxidase activity and decreased SOD and CAT activities in the PVN promote superoxide anions increase to involve in CSAR enhancement. Ang II may increase NAD(P)H oxidase activity via AT1 receptor to induce superoxide anion production.
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Hua W, Chen K, Zhou X, Dai Y, Chen R, Wang J, Ding L, Liu Z, Feng T, Yu J, Cheng J, Liu C, Zhang S. Cardiac resynchronization therapy reduces T-wave alternans in patients with heart failure. Europace 2014; 17:281-8. [DOI: 10.1093/europace/euu258] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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177
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Miloslavsky EM, Specks U, Merkel PA, Seo P, Spiera R, Langford CA, Hoffman GS, Kallenberg CGM, St Clair EW, Tchao NK, Viviano L, Ding L, Iklé D, Villarreal M, Jepson B, Brunetta P, Allen NB, Fervenza FC, Geetha D, Keogh K, Kissin EY, Monach PA, Peikert T, Stegeman C, Ytterberg SR, Stone JH. Rituximab for the treatment of relapses in antineutrophil cytoplasmic antibody-associated vasculitis. Arthritis Rheumatol 2014; 66:3151-9. [PMID: 25047592 PMCID: PMC4229846 DOI: 10.1002/art.38788] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Accepted: 07/15/2014] [Indexed: 01/29/2023]
Abstract
OBJECTIVE Disease relapses are frequent in antineutrophil cytoplasmic antibody-associated vasculitis (AAV). This study was undertaken to evaluate outcomes in patients with AAV who are re-treated with rituximab (RTX) and prednisone for severe disease relapses. METHODS The Rituximab in AAV trial was a randomized, double-blind, placebo-controlled trial comparing the rates of remission induction among patients treated with RTX (n = 99) and patients treated with cyclophosphamide (CYC) followed by azathioprine (AZA) (n = 98). Prednisone was tapered to discontinuation after 5.5 months. After remission was achieved, patients who experienced a severe disease relapse between months 6 and 18 were eligible to receive RTX and prednisone on an open-label basis according to a prespecified protocol. Investigators remained blinded with regard to the original treatment assignment. RESULTS Twenty-six patients received RTX for disease relapse after remission had initially been achieved with their originally assigned treatment. Fifteen of these patients were initially randomized to receive RTX and 11 to receive CYC/AZA. Thirteen (87%) of the patients originally assigned to receive RTX and 10 (91%) originally assigned to receive CYC/AZA achieved remission again with open-label RTX (an overall percentage of 88%). In half of the patients treated with open-label RTX, prednisone could be discontinued entirely. Patients in this cohort experienced fewer adverse events compared to the overall study population (4.7 adverse events per patient-year versus 11.8 adverse events per patient-year). CONCLUSION Re-treatment of AAV relapses with RTX and glucocorticoids appears to be a safe and effective strategy, regardless of previous treatment.
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Barsila S, Kreuzer M, Devkota N, Ding L, Marquardt S. Adaptation to Himalayan high altitude pasture sites by yaks and different types of hybrids of yaks with cattle. Livest Sci 2014. [DOI: 10.1016/j.livsci.2014.09.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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179
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Ding L, Yu M, Chan A. 1-YEAR TARGET VESSEL REVASCULARIZATION AFTER PERCUTANEOUS CORONARY INTERVENTION IN BC (2010-2012). Can J Cardiol 2014. [DOI: 10.1016/j.cjca.2014.07.090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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180
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Fung A, Zhang R, Boone R, Chan A, Della Siega A, Townley R, Kmetic A, Ding L. DETECTION, EXTENT, AND TEMPORAL TRENDS OF OBSTRUCTIVE CORONARY ARTERY DISEASE AMONG PATIENTS UNDERGOING ELECTIVE CARDIAC CATHETERIZATION IN BRITISH COLUMBIA. Can J Cardiol 2014. [DOI: 10.1016/j.cjca.2014.07.091] [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] Open
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181
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Pu A, Ding L, Shin J, Abel J. INDEPENDENT FACTORS ASSOCIATED WITH 5-YEAR REPEAT REVASCULARIZATION AFTER CORONARY ARTERY BYPASS SURGERY IN BC, 2000-2011. Can J Cardiol 2014. [DOI: 10.1016/j.cjca.2014.07.240] [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] Open
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182
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Zhang R, Ding L. TREATMENT RECOMMENDED AND RECEIVED FOLLOWING DIAGNOSTIC CATHETERIZATION FOR CORONARY ARTERY DISEASE IN BC, 2001-2012. Can J Cardiol 2014. [DOI: 10.1016/j.cjca.2014.07.095] [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] Open
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183
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Ng C, Shin J, Ding L. TRENDS AND VARIATION IN TRANSFUSION RATES FOLLOWING CARDIAC SURGERY IN BRITISH COLUMBIA, 2009 TO 2013. Can J Cardiol 2014. [DOI: 10.1016/j.cjca.2014.07.209] [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] Open
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184
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Bennett M, Ayers D, Ding L, Jackson H, Krahn A. THERE IS NO DIFFERENCE IN LONGEVITY OF IMPLANTABLE CARDIOVERTER-DEfiBRILLATORS BETWEEN MANUFACTURERS. Can J Cardiol 2014. [DOI: 10.1016/j.cjca.2014.07.529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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185
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Ding L, Tina Y, Zhang R. A CONTEMPORARY VIEW OF DIAGNOSTIC CARDIAC CATHETERIZATION AND REVASCULARIZATION IN BC: A REPORT FROM THE PROVINCIAL CARDIAC DATA REGISTRY, 2009 - 2013. Can J Cardiol 2014. [DOI: 10.1016/j.cjca.2014.07.058] [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] Open
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186
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Bennett M, Ayers D, Ding L, Jackson H, Krahn A. LONG-TERM SURVIVAL AFTER IMPLANTABLE CARDIOVERTER DEFIBRILLATOR IMPLANTATION: A POPULATION-BASED STUDY. Can J Cardiol 2014. [DOI: 10.1016/j.cjca.2014.07.603] [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] Open
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187
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Sioshansi S, Rava P, Karam A, Ding L, FitzGerald T. Tolerance Dose of the Diaphragm With Liver SBRT. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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188
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Ding L, Wu F, Lu Y, Li L, Jia Y, Jin T, Wu K. Adipose-Derived Stem Cells with the Control Release Vegf Polylactic Acid Fiber Catheters Gelatin Scaffold for Tissue Engineering. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu358.34] [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
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189
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Sun H, Hattori N, Chien W, Sun Q, Sudo M, E-Ling GL, Ding L, Lim SL, Shacham S, Kauffman M, Nakamaki T, Koeffler HP. KPT-330 has antitumour activity against non-small cell lung cancer. Br J Cancer 2014; 111:281-91. [PMID: 24946002 PMCID: PMC4102938 DOI: 10.1038/bjc.2014.260] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 04/14/2014] [Accepted: 04/23/2014] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND We investigated the biologic and pharmacologic activities of a chromosome region maintenance 1 (CRM1) inhibitor against human non-small cell lung cancer (NSCLC) cells both in vitro and in vivo. METHODS The in vitro and in vivo effects of a novel CRM1 inhibitor (KPT-330) for a large number of anticancer parameters were evaluated using a large panel of 11 NSCLC cell lines containing different key driver mutations. Mice bearing human NSCLC xenografts were treated with KPT-330, and tumour growth was assessed. RESULTS KPT-330 inhibited proliferation and induced cell cycle arrest and apoptosis-related proteins in 11 NSCLC cells lines. Moreover, the combination of KPT-330 with cisplatin synergistically enhanced the cell kill of the NSCLC cells in vitro. Human NSCLC tumours growing in immunodeficient mice were markedly inhibited by KPT-330. Also, KPT-330 was effective even against NSCLC cells with a transforming mutation of either exon 20 of EGFR, TP53, phosphatase and tensin homologue, RAS or PIK3CA, suggesting the drug might be effective against a variety of lung cancers irrespective of their driver mutation. CONCLUSIONS Our results support clinical testing of KPT-330 as a novel therapeutic strategy for NSCLC.
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Gilbertson R, Parker M, Mohankumar KM, Punchihewa C, Weinlich R, Dalton JD, Li Y, Lee R, Tatevossian RG, Phoenix TN, Thiruvenkatam R, White E, Tang B, Orisme W, Gupta K, Rusch M, Chen X, Li Y, Nagahawhatta P, Hedlund E, Finkelstein D, Wu G, Shurtleff S, Easton J, Boggs K, Yergeau D, Vadodaria B, Mulder HL, Becksford J, Gupta P, Huether R, Ma J, Song G, Gajjar A, Merchant T, Boop F, Smith AA, Ding L, Lu C, Ochoa K, Zhao D, Fulton RS, Fulton LL, Mardis ER, Wilson RK, Downing JR, Green DR, Zhang J, Ellison DW, Gilbertson RJ. C11ORF95-RELA FUSIONS DRIVE ONCOGENIC NF-KB SIGNALING IN EPENDYMOMA. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou206.57] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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191
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Shen B, Wang W, Ding L, Sao Y, Huang Y, Shen Z, Zhuo Y, Wei Z, Zhang W. Nuclear factor erythroid 2-related factor 2 rescues the oxidative stress induced by di-N-butylphthalate in testicular Leydig cells. Hum Exp Toxicol 2014; 34:145-52. [PMID: 24917652 DOI: 10.1177/0960327114530744] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Aim: This study aimed to determine whether nuclear factor erythroid 2-related factor 2 antagonized the oxidative stress induced by di- N-butylphthalate (DBP) in testicular Leydig cells. Methods: Mouse TM3 testicular Leydig cells were treated with Nrf2 knockdown (KD) or overexpression in the presence and absence of DBP. Oxidative profiles were examined. Nrf2 target antioxidant genes were studied, and the effects of Nrf2 inducer sulphoraphane (SFN) were tested. Results: DBP induced intracellular oxidative stress to a similar extent with Nrf2 KD. Expression and protein levels of Nrf2 were increased together with its target genes, namely heme oxygenase 1, nicotinamide adenine dinucleotide phosphate quinone oxidoreductase 1 and peroxiredoxin 6, following DBP stimulation. Use of SFN not only restored the intracellular oxidative toxicity but also cell proliferation and testosterone secretion in response to DBP. Conclusion: Increased Nrf2 activity, for example, by SFN can effectively antagonize the oxidative stress in testicular Leydig cells caused by DBP.
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Owczarczyk K, Holweg C, Ortmann W, Behrens T, Brunetta P, Specks U, Phippard D, Ding L, Lim N, Tchao N, Ikle D, Stone J. OP0232 The Role of Baseline FCRL5 MRNA Expression in Predicting Response to Rituximab (RTX) Therapy in Patients with Granulomatous Polyangiitis (GPA) or Microscopic Polyangiitis (MPA). Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.4265] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Ding L, Wu JP, Xu G, Zhu B, Zeng QM, Li DF, Lu W. Lentiviral-mediated RNAi targeting caspase-3 inhibits apoptosis induced by serum deprivation in rat endplate chondrocytes in vitro. ACTA ACUST UNITED AC 2014; 47:445-51. [PMID: 24878605 PMCID: PMC4086170 DOI: 10.1590/1414-431x20143198] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2013] [Accepted: 02/20/2014] [Indexed: 01/27/2023]
Abstract
Current studies find that degenerated cartilage endplates (CEP) of vertebrae, with
fewer diffusion areas, decrease nutrient supply and accelerate intervertebral disc
degeneration. Many more apoptotic cells have been identified in degenerated than in
normal endplates, and may be responsible for the degenerated grade. Previous findings
suggest that inhibition of apoptosis is one possible approach to improve disc
regeneration. It is postulated that inhibition of CEP cell apoptosis may be
responsible for the regeneration of endplates. Caspase-3, involved in the execution
phase of apoptosis, is a candidate for regulating the apoptotic process. In the
present study, CEP cells were incubated in 1% fetal bovine serum. Activated caspases
were detected to identify the apoptotic pathway, and apoptosis was quantified by flow
cytometry. Lentiviral caspase-3 short hairpin RNA (shRNA) was employed to study its
protective effects against serum deprivation. Silencing of caspase-3 expression was
quantified by reverse transcription-polymerase chain reaction and Western blots, and
inhibition of apoptosis was quantified by flow cytometry. Serum deprivation increased
apoptosis of rat CEP cells through activation of a caspase cascade. Lentiviral
caspase-3 shRNA was successfully transduced into CEP cells, and specifically silenced
endogenous caspase-3 expression. Surviving cells were protected by the downregulation
of caspase-3 expression and activation. Thus, lentiviral caspase-3 shRNA-mediated
RNAi successfully silenced endogenous caspase-3 expression, preventing inappropriate
or premature apoptosis.
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Hoffman LM, Donson AM, Nakachi I, Griesinger AM, Birks DK, Amani V, Hemenway MS, Liu AK, Wang M, Hankinson TC, Handler MH, Foreman NK, Zakrzewska M, Zakrzewski K, Fendler W, Stefanczyk L, Liberski PP, Massimino M, Gandola L, Ferroli P, Valentini L, Biassoni V, Garre ML, Sardi I, Genitori L, Giussani C, Massimi L, Bertin D, Mussano A, Viscardi E, Modena P, Mastronuzzi A, Barra S, Scarzello G, Cinalli G, Peretta P, Giangaspero F, Massimino M, Boschetti L, Biassoni V, Garre ML, Schiavello E, Sardi I, Genitori L, Bertin D, Modena P, Calareso G, Barra S, Scarzello G, Cinalli G, Peretta P, Mastronuzzi A, Giussani C, Giangaspero F, Antonelli M, Pecori E, Gandola L, Massimino M, Biassoni V, Di Meco F, Garre ML, Schiavello E, Sardi I, Genitori L, Bertin D, Viscardi E, Modena P, Barra S, Scarzello G, Cinalli G, Peretta P, Migliorati R, Taborelli A, Giangaspero F, Antonelli M, Pecori E, Gandola L, Witt H, Sill M, Wani K, Mack SC, Capper D, Pajtler K, Lambert S, Tzaridis T, Milde T, Northcott PA, Kulozik AE, Witt O, Collins VP, Ellison DW, Taylor MD, Kool M, Jones DTW, Korshunov A, Ken A, Pfister SM, Makino K, Nakamura H, Kuroda JI, Kuratsu JI, Toledano H, Margolin Y, Ohali A, Michowiz S, Witt H, Johann P, Tzaridis T, Tabori U, Walker E, Hawkins C, Taylor M, Yaniv I, Avigad S, Hoffman L, Plimpton SR, Foreman NK, Stence NV, Hankinson TC, Handler MH, Hemenway MS, Vibhakar R, Liu AK, Lourdusamy A, Rahman R, Ward J, Rogers H, Grundy R, Punchihewa C, Lee R, Lin T, Orisme W, Dalton J, Aronica E, Smith A, Gajjar A, Onar A, Pounds S, Tatevossian R, Merchant T, Ellison D, Parker M, Mohankumar K, Punchihewa C, Weinlich R, Dalton J, Tatevossian R, Phoenix T, Thiruvenkatam R, White E, Gupta K, Gajjar A, Merchant T, Boop F, Smith A, Ding L, Mardis E, Wilson R, Downing J, Ellison D, Gilbertson R, Ward J, Lourdusamy A, Speed D, Gould T, Grundy R, Rahman R, Mack SC, Witt H, Pfister SM, Korshunov A, Taylor MD, Consortium TIE, Hoffman LM, Griesinger A, Donson A, Birks D, Amani V, Foreman NK, Ohe N, Yano H, Nakayama N, Iwama T, Wright K, Hassall T, Bowers DC, Crawford J, Bendel A, Fisher PG, Merchant T, Ellison D, Klimo P, Boop F, Armstrong G, Qaddoumi I, Robinson G, Wetmore C, Broniscer A, Gajjar A, Rogers H, Chapman R, Mayne C, Duane H, Kilday JP, Coyle B, Grundy R, Graul-Conroy A, Hartsell W, Bragg T, Goldman S, Rebsamen S, Puccetti D, Salamat S, Patel NJ, Gomi A, Oguma H, Hayase T, Kawahara Y, Yagi M, Morimoto A, Wilbur C, Dunham C, Hawkins C, Tabori U, Mabbott D, Carret AS, Lafay-Cousin L, McNeely PD, Eisenstat D, Wilson B, Johnston D, Hukin J, Mynarek M, Kortmann RD, Kaatsch P, Pietsch T, Timmermann B, Fleischhack G, Benesch M, Friedrich C, von Bueren AO, Gerber NU, Muller K, Tippelt S, Warmuth-Metz M, Rutkowski S, von Hoff K, Murugesan MK, White E, Poppleton H, Thiruvenkatam R, Gupta K, Currle S, Kranenburg T, Eden C, Wright K, Ellison D, Gilbertson R, Boulos N, Dapper J, Patel Y, Wright K, Mohankumar K, Freeman B, Gajjar A, Shelat A, Stewart C, Guy R, Gilbertson R, Adamski J, Taylor M, Tabori U, Huang A, Bartels U, Ramaswamy V, Krishnatry R, Laperriere N, Hawkins C, Bouffet E, Araki A, Chocholous M, Gojo J, Dorfer C, Czech T, Dieckmann K, Slavc I, Haberler C, Pietsch T, Mynarek M, Doerner E, Muehlen AZ, Warmuth-Metz M, Kortmann R, von Buehren A, Friedrich C, von Hoff K, Rutkowski S, von Hoff K, Kortmann RD, Gerber NU, Mynarek M, Muller K, Friedrich C, von Bueren AO, Benesch M, Warmuth-Metz M, Ottensmeier H, Resch A, Kwiecien R, Faldum A, Kuehl J, Pietsch T, Rutkowski S, Sabnis D, Storer L, Simmonds L, Blackburn S, Lowe J, Grundy R, Kerr I, Coyle B, Pietsch T, Wohlers I, Goschzik T, Dreschmann V, Denkhaus D, Doerner E, Rahmann S, Klein-Hitpass L, Iglesias MJL, Riet FG, Dhermain FD, Canale S, Dufour C, Rose CS, Puget S, Grill J, Bolle S, Parkes J, Davidson A, Figaji A, Pillay K, Kilborn T, Padayachy L, Hendricks M, Van Eyssen A, Piccinin E, Lorenzetto E, Brenca M, Massimino M, Modena P, Taylor M, Ramaswamy V, Bouffet E, Aldape K, Cho YJ, Weiss W, Phillips J, Jabado N, Mora J, Fan X, Jung S, Lee JY, Zitterbart K, French P, Kros JM, Hauser P, Faria C, Korshunov A, Pfister S, Mack SC. EPENDYMOMA. Neuro Oncol 2014; 16:i17-i25. [PMCID: PMC4046284 DOI: 10.1093/neuonc/nou068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/07/2023] Open
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Chen K, Zhang N, Ding L, Zhang W, Hu J, Zhu S. Early intra-articular injection of alendronate reduces cartilage changes and subchondral bone loss in rat temporomandibular joints after ovariectomy. Int J Oral Maxillofac Surg 2014; 43:996-1004. [PMID: 24811289 DOI: 10.1016/j.ijom.2014.04.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2013] [Revised: 02/10/2014] [Accepted: 04/03/2014] [Indexed: 02/06/2023]
Abstract
This study investigated the effects of intra-articular injection of alendronate on the mandibular condyle in ovariectomized rats. Sixty rats were divided into five groups: ovariectomy with vehicle treatment alone, early alendronate treatment at ovariectomy, late alendronate treatment at 4 weeks after ovariectomy, sham-operation with vehicle treatment, and normal controls. The changes in cartilage and subchondral bone were evaluated by micro-computed tomography, histology, tartrate-resistant acid phosphatase (TRAP) staining, immunohistochemistry, and real-time quantitative polymerase chain reaction. Compared with late alendronate treatment, early alendronate treatment completely inhibited cartilage thickening (727.6±39.3 vs. 1013.3±51.6; P=0.017) and improved microstructural properties of the subchondral bone, with a higher bone volume ratio (46.4±2.5 vs. 37.5±2.1; P=0.038), trabecular thickness (47.3±1.7 vs. 34.6±1.4; P=0.029), and trabecular number (8.5±0.6 vs. 6.2±0.3; P=0.041) and lower trabecular separation (30.2±1.6 vs. 37.7±2.6; P=0.034). Fewer TRAP-positive cells (4.2±0.2 vs. 6.8±0.4; P=0.019) and a higher OPG/RANKL ratio (0.38±0.01 vs. 0.25±0.03; P=0.043) in the subchondral bone were observed in the animals with early treatment compared to late treatment or ovariectomy/vehicle treatment. In addition, early alendronate treatment blocked the up-regulation of matrix metalloproteinase (MMP)-13 expression in the chondrocytes, whereas late alendronate treatment attenuated the up-regulation of MMP-13 expression. Our results suggest the therapeutic potential of intra-articular alendronate injection in the treatment of osteoporosis-associated temporomandibular disorders.
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Wu Y, Ding L, Huang NY, Wen AD, Liu B, Li WB. Pharmacokinetics of metronidazole, tetracycline and bismuth in healthy volunteers after oral administration of compound tablets containing a combination of metronidazole, tetracycline hydrochloride and bismuth oxide. Drug Res (Stuttg) 2014; 65:74-81. [PMID: 24764254 DOI: 10.1055/s-0034-1372611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND To eradicate Helicobacter pylori in human pylorus and to heal duodenal ulcers, recently, a new formulation of combination tablets containing metronidazole 125 mg, tetracycline hydrochloride 125 mg and bismuth oxide 40 mg has been developed. OBJECTIVE To investigate the pharmacokinetics of metronidazole, tetracycline and bismuth in healthy Chinese volunteers after oral administration of the test formulation. METHODS A one-sequence, 3-period study was conducted in 12 Chinese healthy volunteers (6 male, 6 female). Volunteers each received single low dose (1 tablet) under fed condition in period 1, single high dose (3 tablets) under fasted condition in period 2, and single high dose (3 tablets) and multiple doses (3 tablets at once, 4 times daily for 7 consecutive days) under fed condition in period 3. Blood samples were collected and determined over 48 h in every period. RESULTS AND CONCLUSION After single high dose administration under fed condition, the C max of metronidazole, tetracycline and bismuth were 6.833 ± 0.742 μg/mL, 0.8513 ± 0.1253 μg/mL and 3.32 ± 1.89 ng/mL, respectively. The C max and AUC 0-48 of metronidazole increased in proportion to the doses within the tested dose range, but tetracycline and bismuth did not. Food caused 10% and 80% decrease of the C max for metronidazole and bismuth, respectively, but did not affect tetracycline. No gender effect was found on the pharmacokinetics of the 3 ingredients. In the steady state, the C av of metronidazole, tetracycline and bismuth were 20.75 ± 3.52 μg/mL, 1.900 ± 0.243 μg/mL and 5.61 ± 1.34 ng/mL, respectively.
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Zhang Z, Dai D, Yu K, Yuan F, Jin J, Ding L, Hao Y, Liang F, Liu N, Zhao X, Long J, Xi Y, Sun YY. Association of HLA-B27 and ERAP1 with ankylosing spondylitis susceptibility in Beijing Han Chinese. ACTA ACUST UNITED AC 2014; 83:324-9. [PMID: 24666027 DOI: 10.1111/tan.12334] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 02/11/2014] [Accepted: 02/13/2014] [Indexed: 12/30/2022]
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Ding L, Zhao Z, Ge X, Li Z. Different timing and spatial separation of parental chromosomes in intergeneric somatic hybrids between Brassica napus and Orychophragmus violaceus. GENETICS AND MOLECULAR RESEARCH 2014; 13:2611-8. [DOI: 10.4238/2014.april.8.3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Minden S, Ding L, Cleary P, Frankel D, Glanz B, Healy B, Rintell D. Improving the quality of mental health care in Multiple Sclerosis. J Neurol Sci 2013; 335:42-7. [DOI: 10.1016/j.jns.2013.08.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 07/22/2013] [Accepted: 08/14/2013] [Indexed: 11/26/2022]
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Miloslavsky EM, Specks U, Merkel PA, Seo P, Spiera R, Langford CA, Hoffman GS, Kallenberg CGM, St Clair EW, Tchao NK, Viviano L, Ding L, Sejismundo LP, Mieras K, Iklé D, Jepson B, Mueller M, Brunetta P, Allen NB, Fervenza FC, Geetha D, Keogh K, Kissin EY, Monach PA, Peikert T, Stegeman C, Ytterberg SR, Stone JH. Clinical outcomes of remission induction therapy for severe antineutrophil cytoplasmic antibody-associated vasculitis. ACTA ACUST UNITED AC 2013; 65:2441-9. [PMID: 23754238 DOI: 10.1002/art.38044] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2012] [Accepted: 05/30/2013] [Indexed: 01/25/2023]
Abstract
OBJECTIVE To evaluate the reasons that complete remission is not achieved or maintained with original treatment in some patients with antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) treated with rituximab (RTX) or with cyclophosphamide/azathioprine (CYC/AZA). METHODS The Rituximab in AAV trial was a randomized, double-blind, placebo-controlled trial comparing the rate of remission induction among patients treated with RTX (n = 99) and patients treated with CYC followed by AZA (n = 98). Glucocorticoids were tapered over a period of 5 months. The primary outcome measure was lack of disease activity without glucocorticoid treatment at 6 months. To determine the most important reason for failure to achieve the primary outcome, 7 hierarchical categories of reasons were defined retrospectively (uncontrolled disease, adverse event leading to therapy discontinuation, severe flare, limited flare, Birmingham Vasculitis Activity Score for Wegener's Granulomatosis >0, prednisone treatment at any dosage, and other). RESULTS Although remission (lack of disease activity) was achieved in 170 of the 197 patients (86%) in the first 6 months, the primary outcome measure was not achieved in 42%. There were 3 deaths. Twenty-four percent of the patients failed to achieve the primary end point due to active disease: 10 (5%) experienced uncontrolled disease in the first month and 37 (19%) experienced flares after initial improvement. In the majority of such patients, treatment with blinded crossover or according to best medical judgment led to disease control. Ninety-one percent of patients who had uncontrolled disease or experienced a severe flare had proteinase 3 (PR3)-ANCA. When patients with uncontrolled disease were excluded from analysis, those who were PR3-ANCA positive were found to experience fewer flares when treated with RTX compared to CYC/AZA (8 of 59 [14%] versus 20 of 62 [32%]; P = 0.02). Neither ANCA titers nor B cell counts predicted disease flare. CONCLUSION Current treatment regimens are largely successful in controlling AAV, but in approximately one-fourth of patients, active disease persists or recurs in the first 6 months despite treatment. PR3-ANCA positivity is a risk factor for recurrence or persistence of severe disease. ANCA titers and B cell detectability are poor predictors of both disease relapse and disease quiescence in the first 6 months.
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