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Dong F, Huang Y, Li W, Zhao X, Zhang W, Du Q, Zhang H, Song X, Tong D. The isolation and characterization of a telomerase immortalized goat trophoblast cell line. Placenta 2013; 34:1243-50. [PMID: 24112823 DOI: 10.1016/j.placenta.2013.09.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 08/23/2013] [Accepted: 09/16/2013] [Indexed: 10/26/2022]
Abstract
Trophoblast cells play vital roles in the processes of embryonic implantation and placentation. Many toxicological compounds can induce the malfunction of trophoblast cells, resulting in implantation failure or early embryonic loss. The finite lifespan of primary trophoblast cells limits investigation of the long-term effects of some toxicological compounds on trophoblast cells in vitro. In this study, primary goat trophoblast cells were purified by density gradient centrifugation and specific immuno-affinity purification. Then, the purified cells were immortalized through transfection of a plasmid containing the human telomerase reverse transcriptase (hTERT) gene. hTERT-transfected goat trophoblast cells (hTERT-GTCs) could steadily express hTERT gene and exhibit higher telomerase activity, and persistently proliferate without any signs of senescence up to 50 passages. The immortalized goat trophoblast cells still possessed the basic and key properties of normal primary goat trophoblast cells to express the specific intracellular marker cytokeratin 7 (CK-7) and secrete chorionic gonadotrophin β-subunit (CG-β) and placental lactogen (PL). Further studies showed that the immortalized goat trophoblast cells expressed vimentin and non-classical MHC class I antigen and exhibited invasive phenotype, suggesting that the immortalized goat trophoblasts resembled human extravillous trophoblasts. In addition, this cell line did not show neoplastic transformation either in vivo or in vitro. We concluded the immortalized goat trophoblast cells by hTERT transfection retained the basic and key characteristics of primary trophoblast cells and may provide a useful model to study the effects of some toxicological compounds on trophoblast cells.
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Mao Q, Huang Y, Zhu S, Tong D, Ibrahim Z, Christensen J, Pang J, Cooney DS, Li J, Li Y, Lee WP, Kang JU, Brandacher G. Abstract 134. Plast Reconstr Surg 2013. [DOI: 10.1097/01.prs.0000430076.59234.80] [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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Tong D, Roberts L, Beale J, Jangwal H, Baradi A, Jackson D, Naidu P, Rowe M, Cheong Y, Proimos G, Fernando D, Goods C, New G. Trends in PCI Over the Last Decade at Box Hill Hospital (BHH). Heart Lung Circ 2013. [DOI: 10.1016/j.hlc.2013.05.383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Clarke K, Tong D, Pan Y, Easley KA, Norrick B, Ko C, Wang A, Razavi B, Stein J. Reduction in catheter-associated urinary tract infections by bundling interventions. Int J Qual Health Care 2012; 25:43-9. [DOI: 10.1093/intqhc/mzs077] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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Tong D, Manolios N, Howe G, Spencer D. New onset sarcoid-like granulomatosis developing during anti-TNF therapy: an under-recognised complication. Intern Med J 2012; 42:89-94. [PMID: 22389903 DOI: 10.1111/j.1445-5994.2011.02612.x] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Tumour necrosis factor-alpha (TNF-a) antagonists have advanced the treatment of inflammatory arthropathies, and are even considered for use in refractory sarcoidosis with some success. Paradoxically, cases of new onset sarcoidosis-like diseases are increasingly reported in patients receiving TNF-a antagonists. Here, we report three cases of sarcoid-like granulomatosis that developed during treatment with TNF-a antagonists. Review of the Biologics clinic data base at Westmead, Sydney, Australia identified three patients whom, during anti-TNF therapy, developed non-caseating granulomas consistent with sarcoidosis. These three cases are described with review of the literature from 2000 to 2009 using PubMed. One hundred and sixty-nine patients within our data base were reviewed for the period 2003–2009. Sarcoidosis-like granulomas developed in three patients within a period of 3 to 36 months of treatment with etanercept and/or adalimumab. All cases demonstrated non-infective, non-caseating granulomas on renal or lymph node biopsy. Improvement was seen in two cases upon cessation of TNF-a antagonist and steroid therapy. Interestingly, clinical deterioration was noted upon re-challenge with the same TNF-a antagonist in one patient. To date, a total of 37 cases of sarcoid-like granuloma development after anti-TNF therapy have been reported in the literature. Development of sarcoidosis-like granulomatosis in patients treated with TNF-a antagonists is a phenomenon previously under-recognised. All three anti-TNF agents have been observed to cause this phenomenon, suggesting a ‘class effect’ rather than being drug specific.
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Tong D, Grosvenor D, Bedenk A, Thomas J, Rose J, Barazangi N. Outcomes of Transferred Versus Direct-Admit Hemorrhagic Stroke Patients at a Large Comprehensive Stroke Center (P02.203). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p02.203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Barazangi N, Grosvenor D, Bedenk A, Rose J, Tong D. Comparing Outcomes of Transferred Versus Direct-Admit Ischemic Stroke Patients at a Large Comprehensive Stroke Center (P01.034). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p01.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Spokoyny I, Chen C, Wong C, Rose J, Tong D, Barazangi N. Classic Prevalence and Variation of Reduced CYP219 Metabolism in Clopidogrel Treated Stroke and TIA Patients and Associated Rates of Recurrent Vascular Events (P01.023). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p01.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Cai Z, Tong D, Meadmore KL, Freeman CT, Hughes AM, Rogers E, Burridge JH. Design & control of a 3D stroke rehabilitation platform. IEEE Int Conf Rehabil Robot 2012; 2011:5975412. [PMID: 22275615 DOI: 10.1109/icorr.2011.5975412] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
An upper limb stroke rehabilitation system is developed which combines electrical stimulation with mechanical arm support, to assist patients performing 3D reaching tasks in a virtual reality environment. The Stimulation Assistance through Iterative Learning (SAIL) platform applies electrical stimulation to two muscles in the arm using model-based control schemes which learn from previous trials of the task. This results in accurate movement which maximises the therapeutic effect of treatment. The principal components of the system are described and experimental results confirm its efficacy for clinical use in upper limb stroke rehabilitation.
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Munnur K, Roberts L, Shields C, Jangwel H, Tong D, Kerr G, Pandelli V, Cooke J, Cheong Y, Chou B, Hamer A, Goods C, Gordon G, Low R, Proimos G, Rowe M, Stevenson I, New G. Is Remote Telemetry Monitoring of Non-Cardiology Patients Worthwhile? Heart Lung Circ 2012. [DOI: 10.1016/j.hlc.2012.05.624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Shields C, Roberts L, Munnar K, Jangwal H, Tong D, Beale J, Phan M, Burton A, Collins B, Scully C, Rowe M, Cheong Y, Proimos G, Fernando D, Goods C, New G. A Decade of PCI Experience with Off-site Surgical Back-up at Box Hill Hospital: What Have We Learnt? Heart Lung Circ 2012. [DOI: 10.1016/j.hlc.2012.05.363] [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]
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Or PPL, Chan E, Tong D, Chow M, Ching P, Seto W, Pang S, Fritsch K. Bi-regional training course for staff managing healthcare-assocaited infection (HAI) with minimal resources. BMC Proc 2011. [PMCID: PMC3239715 DOI: 10.1186/1753-6561-5-s6-p284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Pils D, Hager G, Wolf A, Aust S, Grimm C, Speiser P, Sehouli J, Braicu I, Cadron I, Vergote I, Mahner S, Tong D, Zeillinger R. Molekulare Subklassifizierung als unabhängiger Prognosefaktor bei Patientinnen mit Ovarialkarzinom – eine Studie des OVCAD Konsortiums. Geburtshilfe Frauenheilkd 2011. [DOI: 10.1055/s-0031-1278584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Tong D. Are all IV thrombolysis exclusion criteria necessary?: Being SMART about evidence-based medicine. Neurology 2011; 76:1780-1. [DOI: 10.1212/wnl.0b013e31821ccd60] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Hofstetter G, Berger A, Schuster E, Wolf A, Holzer B, Fiegl H, Marth C, Zeimet AG, Tong D, Zeillinger R, Concin N. Die N-terminal verkürzten p53-Isoformen Δ40p53 und Δ133p53 beeinflussen die Prognose bei Patientinnen mit fortgeschrittenen serösen Ovarialkarzinomen - eine prospektive Multizenterstudie. Geburtshilfe Frauenheilkd 2011. [DOI: 10.1055/s-0031-1280632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Tong D, Deng J, Sun H, Chen L, Wu X. The relationship between CAG repeat length polymorphism and infertility in Southern Chinese Han women. J Endocrinol Invest 2010; 33:559-63. [PMID: 20190557 DOI: 10.1007/bf03346648] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To research the relationship between polymorphism of trinucleotide (CAG)n repeat alleles of the Exon 1 of androgen receptor gene and women with polycystic ovary syndrome (PCOS), or with endometriosis. MATERIALS AND METHODS One hundred and forty-one control women and 74 women with PCOS and with endometriosis were recruited. The (CAG)n repeat alleles were genotyped with 3100 genetic analyser. The repeat number and frequency distributions of (CAG)n alleles were compared and analyzed statistically. RESULTS The results showed that mean repeat number of the (CAG)n was significantly lower in women with PCOS than in controls (p<0.001). The mean repeat number of the (CAG)n was significantly different between infertile women with endometriosis (p<0.05). However, the differences between infertile women with PCOS and fertile women with PCOS was not significant (p>0.05). CONCLUSIONS These data indicated that (CAG)n repeat polymorphism have some influence, but have not a straight relationship in infertile women with PCOS and with endometriosis in this research population.
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Becconsall-Ryan K, Tong D, Love RM. Radiolucent inflammatory jaw lesions: a twenty-year analysis. Int Endod J 2010; 43:859-65. [DOI: 10.1111/j.1365-2591.2010.01751.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Donatello S, Tong D, Cheeseman CR. Production of technical grade phosphoric acid from incinerator sewage sludge ash (ISSA). WASTE MANAGEMENT (NEW YORK, N.Y.) 2010; 30:1634-1642. [PMID: 20434899 DOI: 10.1016/j.wasman.2010.04.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Revised: 03/05/2010] [Accepted: 04/07/2010] [Indexed: 05/29/2023]
Abstract
The recovery of phosphorus from sewage sludge ash samples obtained from 7 operating sludge incinerators in the UK using a sulfuric acid washing procedure to produce a technical grade phosphoric acid product has been investigated. The influences of reaction time, sulfuric acid concentration, liquid to solid ratio and source of ISSA on P recovery have been examined. The optimised conditions were the minimum stoichiometric acid requirement, a reaction time of 120 min and a liquid to solid ratio of 20. Under these conditions, average recoveries of between 72% and 91% of total phosphorus were obtained. Product filtrate was purified by passing through a cation exchange column, concentrated to 80% H(3)PO(4) and compared with technical grade H(3)PO(4) specifications. The economics of phosphate recovery by this method are briefly discussed.
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Wang HX, Tong D, El-Gehani F, Tekpetey FR, Kidder GM. Connexin expression and gap junctional coupling in human cumulus cells: contribution to embryo quality. J Cell Mol Med 2008; 13:972-84. [PMID: 18505471 PMCID: PMC3823412 DOI: 10.1111/j.1582-4934.2008.00373.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Gap junctional coupling among cumulus cells is important for oogenesis since its deficiency in mice leads to impaired folliculogenesis. Multiple connexins (Cx), the subunits of gap junction channels, have been found within ovarian follicles in several species but little is known about the connexins in human follicles. The aim of this study was to determine which connexins contribute to gap junctions in human cumulus cells and to explore the possible relationship between connexin expression and pregnancy outcome from in vitro fertilization (IVF). Cumulus cells were obtained from IVF patients undergoing intra-cytoplasmic sperm injection (ICSI). Connexin expression was examined by RT-PCR and confocal microscopy. Cx43 was quantified by immunoblotting and gap junctional coupling was measured by patch-clamp electrophysiology. All but 5 of 20 connexin mRNAs were detected. Of the connexin proteins detected, Cx43 forms numerous gap junction-like plaques but Cx26, Cx30, Cx30.3, Cx32 and Cx40 appeared to be restricted to the cytoplasm. The strength of gap junctional conductance varied between patients and was significantly and positively correlated with Cx43 level, but neither was correlated with patient age. Interestingly, Cx43 level and intercellular conductance were positively correlated with embryo quality as judged by cleavage rate and morphology, and were significantly higher in patients who became pregnant than in those who did not. Thus, despite the presence of multiple connexins, Cx43 is a major contributor to gap junctions in human cumulus cells and its expression level may influence pregnancy outcome after ICSI.
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Tong D. Using Satellite Fire Detection and Air Quality Modeling to Evaluate Community Exposure to Fire-Induced Pollutants. Epidemiology 2007. [DOI: 10.1097/01.ede.0000276546.88862.62] [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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Tong D, Farooqi SM, Stanojevic J, Krishnan S, Zhang YP, Côté R, Eyler EE, Gould PL. Local blockade of Rydberg excitation in an ultracold gas. PHYSICAL REVIEW LETTERS 2004; 93:063001. [PMID: 15323624 DOI: 10.1103/physrevlett.93.063001] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2004] [Indexed: 05/24/2023]
Abstract
In the laser excitation of ultracold atoms to Rydberg states, we observe a dramatic suppression caused by van der Waals interactions. This behavior is interpreted as a local excitation blockade: Rydberg atoms strongly inhibit excitation of their neighbors. We measure suppression, relative to isolated atom excitation, by up to a factor of 6.4. The dependences of this suppression on both laser irradiance and atomic density are in good agreement with a mean-field model. These results are an important step towards using ultracold Rydberg atoms in quantum information processing.
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Farooqi SM, Tong D, Krishnan S, Stanojevic J, Zhang YP, Ensher JR, Estrin AS, Boisseau C, Côté R, Eyler EE, Gould PL. Long-range molecular resonances in a cold Rydberg gas. PHYSICAL REVIEW LETTERS 2003; 91:183002. [PMID: 14611280 DOI: 10.1103/physrevlett.91.183002] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2003] [Indexed: 05/24/2023]
Abstract
We present evidence for molecular resonances in a cold dense gas of rubidium Rydberg atoms. Single UV photon excitation from the 5s ground state to np Rydberg states (n=50-90) reveals resonances at energies corresponding to excited atom pairs (n-1)d+ns. We attribute these normally forbidden transitions to avoided crossings between the long-range molecular potentials of two Rydberg atoms. These strong van der Waals interactions result in avoided crossings at extremely long range, e.g., approximately 58 000 times the Bohr radius (a(0)) for n=70.
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Tong D, Fabjani G, Heinze G, Obermair A, Leodolter S, Zeillinger R. Analysis of the human progesterone receptor gene polymorphism progins in Austrian ovarian carcinoma patients. Int J Cancer 2001; 95:394-7. [PMID: 11668524 DOI: 10.1002/1097-0215(20011120)95:6<394::aid-ijc1070>3.0.co;2-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Ovarian carcinoma is the highest death cause in gynecologic malignancies. Although the molecular basis for familial breast and ovarian cancer is elucidated, few genetic markers have been associated with sporadic ovarian carcinoma. A polymorphism in intron G of the human progesterone receptor (PgR), caused by an Alu insertion, was described to be associated with ovarian carcinoma in a pooled German/Irish population. Later on, a G to T substitution in exon 4, causing a Valine to Leucine change in the hinge region of the receptor, and a synonymous C to T substitution in exon 5 were reported to be linked to the Alu insertion. This complex of the PgR gene polymorphism was designated PROGINS. In order to investigate if PROGINS is associated with risk for ovarian cancer in Austrian women, we analyzed DNA from 226 Austrian patients with sporadic ovarian carcinoma and a control group with 194 healthy volunteers for the PROGINS complex. The PROGINS status was studied in association with risk for ovarian carcinoma, the age of the ovarian patients, the protein level of PgR and estrogen receptor (ER) and histopathological parameters. The results indicate that the frequency of PROGINS carriers in Austrian women is similar to those in women in North America and England. There is no significant difference between the PROGINS allele distribution in ovarian carcinoma patients and healthy women. The PROGINS is not associated with increased risk for ovarian carcinomas. Additionally, the protein levels of ER and PgR were independent of the PROGINS status.
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Tong D, Heényi C, Bikádi Z, Gao JP, Hjertén S. Some studies of the chromatographic properties of gels (‘Artificial antibodies/receptors’) for selective adsorption of proteins. Chromatographia 2001. [DOI: 10.1007/bf02491825] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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