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Woolcott J, Blackhouse G, Claxton L, Wallenstein G, Tran T, Goeree R, Taylor M, Moynagh D, Singh A. SAT0348 The Economic Value of Tofacitinib 5 Mg Bid in the Treatment of Moderate to Severe Rheumatoid Arthritis: A Canadian Analysis. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.4246] [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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Ashfaq A, Gordon R, Belliot C, Ben-Artzi A, Fort NS, Tran T, Pettersen K, Jaswal J. Developing rheumatology capacity in Haiti: Piloting a rheumatology
training program, establishing a teaching clinic, and advancing medical
curriculum. Ann Glob Health 2015. [DOI: 10.1016/j.aogh.2015.02.547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Fuller A, Butler E, Tran T, Makumbi F, Luboga S, Muhumuza C, Chipman J, Galukande M, Haglund M. Surgeons OverSeas Assessment of Surgical Need (SOSAS) Methodology Update
and mobile-assisted data dissemination system (mADDS) Platform for Scale in
Larger Low- and Middle-income Countries. Ann Glob Health 2015. [DOI: 10.1016/j.aogh.2015.02.708] [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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Nguyen-Dumont T, Mahmoodi M, Hammet F, Tran T, Tsimiklis H, Giles GG, Hopper JL, Southey MC, Park DJ. Hi-Plex targeted sequencing is effective using DNA derived from archival dried blood spots. Anal Biochem 2014; 470:48-51. [PMID: 25447460 DOI: 10.1016/j.ab.2014.10.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 10/15/2014] [Accepted: 10/17/2014] [Indexed: 11/28/2022]
Abstract
Many genetic epidemiology resources have collected dried blood spots (predominantly as Guthrie Cards) as an economical and efficient means of archiving sources of DNA, conferring great value to genetic screening methods that are compatible with this medium. We applied Hi-Plex to screen the breast cancer predisposition gene PALB2 in 93 Guthrie Card-derived DNA specimens previously characterized for PALB2 genetic variants via DNA derived from lymphoblastoid cell lines, whole blood, and buffy coat. Of the 93 archival Guthrie Card-derived DNAs, 92 (99%) were processed successfully and sequenced using approximately half of a MiSeq run. From these 92 DNAs, all 59 known variants were detected and no false-positive variant calls were yielded. Fully 98.13% of amplicons (5417/5520) were represented within 15-fold of the median coverage (2786 reads), and 99.98% of amplicons (5519/5520) were represented at a depth of 10 read-pairs or greater. With Hi-Plex, we show for the first time that a High-Plex amplicon-based massively parallel sequencing (MPS) system can be applied effectively to DNA prepared from dried blood spot archival specimens and, as such, can dramatically increase the scopes of both method and resource.
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Kenyon M, Streicher U, Loung H, Tran T, Tran M, Vo B, Cronin A. Survival of reintroduced pygmy slow loris Nycticebus pygmaeus in South Vietnam. ENDANGER SPECIES RES 2014. [DOI: 10.3354/esr00607] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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106
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Ganapathy L, Tran T, Brownstein J, Niescierenko M. Leveraging health informatics for a global health needs assessment at
home. Ann Glob Health 2014. [DOI: 10.1016/j.aogh.2014.08.020] [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] Open
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Dhanireddy B, Mourad W, Patel S, Concert C, Ryniak M, Shourbaji R, Gámez M, Lukens J, Nabhani T, Katsoulakis E, Khorsandi A, Schantz S, Blakaj D, Blakaj A, Tran T, Urken M, Persky M, Shasha D, Hu K, Harrison L. The Impact of Smoking on Laryngeal Preservation in Locally Advanced Laryngeal Cancer Treated With Definitive Chemoradiation Therapy. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1641] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Dhanireddy B, Mourad W, Patel S, Concert C, Ryniak M, Shourbaji R, Gámez M, Lukens J, Nabhani T, Katsoulakis E, Blakaj D, Blakaj A, Khorsandi A, Kang P, Tran T, Urken M, Persky M, Shasha D, Hu K, Harrison L. The Impact of Different Radiation Therapy Techniques on Oncologic and Functional Outcomes of Locally Advanced Laryngeal Cancer. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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109
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Wang C, Hu K, Dhanireddy B, Lukens J, Patel S, Kang P, Khorsandi A, Concert C, Ryniak M, Shourbaji R, Gámez M, Li Z, Culliney B, Li J, Tran T, Schantz S, Costantino P, Persky M, Mourad W, Harrison L. Metabolic Tumor Volume (MTV) and Maximum Standardized Uptake Value (SUVmax) as Predictive Factors in Locally Advanced Nasopharyngeal Cancer Treated With Definitive Chemoradiation Therapy. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Samanta D, Ingremeau F, Cerbus R, Tran T, Goldburg WI, Chakraborty P, Kellay H. Scaling of near-wall flows in quasi-two-dimensional turbulent channels. PHYSICAL REVIEW LETTERS 2014; 113:024504. [PMID: 25062190 DOI: 10.1103/physrevlett.113.024504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Indexed: 06/03/2023]
Abstract
The law of the wall and the log law rule the near-wall mean velocity profile of three-dimensional turbulent flows. These well-known laws, which are validated by legions of experiments and simulations, may be universal. Here, using a soap-film channel, we report the first experimental test of these laws in quasi-two-dimensional turbulent channel flows under two disparate turbulent spectra. We find that despite the differences with three-dimensional flows, the laws prevail, albeit with notable distinctions: the two parameters of the log law are markedly distinct from their three-dimensional counterpart; further, one parameter (the von Kármán constant) is independent of the spectrum whereas the other (the offset of the log law) depends on the spectrum. Our results suggest that the classical theory of scaling in wall-bounded turbulence is incomplete wherein a key missing element is the link with the turbulent spectrum.
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Karaki S, Garcia G, Tcherakian C, Capel F, Tran T, Pallardy M, Humbert M, Emilie D, Godot V. Enhanced glucocorticoid-induced leucine zipper in dendritic cells induces allergen-specific regulatory CD4(+) T-cells in respiratory allergies. Allergy 2014; 69:624-31. [PMID: 24606015 DOI: 10.1111/all.12379] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/21/2014] [Indexed: 01/08/2023]
Abstract
BACKGROUND Respiratory allergies rely on a defect of IL-10-secreting regulatory CD4(+) T-cells (IL-10-Tregs ) leading to excessive Th2-biased immune responses to allergens. According to clinical data, the restoration of allergen-specific IL-10-Tregs is required to control respiratory allergies and cure patients. The discovery of mechanisms involved in the generation of IL-10-Tregs will thus help to provide effective treatments. We previously demonstrated that dendritic cells (DCs) expressing high levels of the glucocorticoid-induced leucine zipper protein (GILZ) generate antigen-specific IL-10-Tregs . OBJECTIVE We suspect a defective expression of GILZ in the DCs of respiratory allergic patients and speculate that increasing its expression might restore immune tolerance against allergens through the induction of IL-10-Tregs . METHODS We assessed GILZ expression in blood DCs of patients and healthy nonallergic donors by qPCR. We compared the ability of patients' DCs to induce allergen-specific IL-10-Tregs before and after an in vivo up-regulation of GILZ expression by steroid administration, steroids being inducers of GILZ. RESULTS We report lower levels of GILZ in DCs of respiratory allergic patients that return to normal levels after steroid administration. We show that patients' DCs with increased levels of GILZ generate allergen-specific IL-10-Tregs again. We further confirm unequivocally that GILZ is required in patients' DCs to activate these IL-10-Tregs . CONCLUSION This proof of concept study shows that the re-establishment of GILZ expression in patients' DCs to normal levels restores their capacity to activate allergen-specific IL-10-Tregs . We thus highlight the up-regulation of GILZ in DCs as a new interventional approach to restore the immune tolerance to allergens.
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Lazarus CL, Husaini H, Hu K, Culliney B, Li Z, Urken M, Jacobson A, Persky M, Tran T, Concert C, Palacios D, Metcalfe-Klaw R, Kumar M, Bennett B, Harrison L. Functional Outcomes and Quality of Life After Chemoradiotherapy: Baseline and 3 and 6 Months Post-Treatment. Dysphagia 2014; 29:365-75. [DOI: 10.1007/s00455-014-9519-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2013] [Accepted: 02/07/2014] [Indexed: 10/25/2022]
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Wilkinson DJC, de Crespigny L, Lees C, Savulescu J, Thiele P, Tran T, Watkins A. Perinatal management of trisomy 18: a survey of obstetricians in Australia, New Zealand and the UK. Prenat Diagn 2014; 34:42-9. [PMID: 24122837 PMCID: PMC3963474 DOI: 10.1002/pd.4249] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 09/20/2013] [Accepted: 09/29/2013] [Indexed: 11/26/2022]
Abstract
OBJECTIVE The objective of this study was to explore the attitudes of obstetricians in Australia, New Zealand and the UK towards prenatally diagnosed trisomy 18 (T18). METHOD Obstetricians were contacted by email and invited to participate in an anonymous electronic survey. RESULTS Survey responses were obtained from 1018/3717 (27%) practicing obstetricians/gynaecologists. Most (60%) had managed a case of T18 in the last 2 years. Eighty-five per cent believed that T18 was a 'lethal malformation', although 38% expected at least half of liveborn infants to survive for more than 1 week. Twenty-one per cent indicated that a vegetative existence was the best developmental outcome for surviving children. In a case of antenatally diagnosed T18, 95% of obstetricians would provide a mother with the option of termination. If requested, 99% would provide maternal-focused obstetric care (aimed at maternal wellbeing rather than fetal survival), whereas 80% would provide fetal-oriented obstetric care (to maximise fetal survival). Twenty-eight per cent would never discuss the option of caesarean; 21% would always discuss this option. Management options, attitudes and knowledge of T18 were associated with location, practice type, gender and religion of obstetricians. CONCLUSION There is variability in obstetricians' attitudes towards T18, with significant implications for management of affected pregnancies.
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Krüger S, Tran T. EPA-1061 – Agomelatine in the treatment of perimenopausal depression - a pilot study. Eur Psychiatry 2014. [DOI: 10.1016/s0924-9338(14)78345-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Hannigsberg J, Bourdon A, Tran T, Castellano B, poupeau G, Parnet P, Winer N, Darmaun D. O27 Effets de la supplémentation orale en citrulline sur la croissance fœtale dans un modèle animal de retard de croissance intra-utérin. NUTR CLIN METAB 2013. [DOI: 10.1016/s0985-0562(13)70299-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Acquaye AA, Vera-Bolanos E, Gilbert MR, Armstrong TS, Lin L, Amidei C, Lovely M, Arzbaecher J, Page M, Mogensen K, Lupica K, Maher ME, Armstrong TS, Won M, Wefel JS, Gilbert MR, Pugh S, Wendland MM, Brachman DG, Brown PD, Crocker IR, Robins HI, Lee RJ, Mehta M, Arvold N, Wang Y, Zigler C, Schrag D, Dominici F, Boele F, Douw L, de Groot M, van Thuijl H, Cleijne W, Heimans J, Taphoorn M, Reijneveld J, Klein M, Bunevicius A, Tamasauskas S, Tamasauskas A, Deltuva V, Bunevicius R, Cahill J, Lin L, Armstrong T, Acquaye A, Vera-Bolanos E, Gilbert M, Padhye N, Chan J, Clarke J, Lawton K, Rabbitt J, DeSilva A, Prados M, Rosen M, Cher L, Diamond E, Applebaum A, Corner G, DeRosa A, Breitbart W, DeAngelis L, Hoogendoorn P, Ikuta S, Muragaki Y, Maruyama T, Nitta M, Tamura M, Okamoto S, Iseki H, Okada Y, Lacouture M, Davis ME, Elzinga G, Butowski N, Tran D, Villano J, Wong E, Legge D, Cher L, Legge D, Cher L, Mills K, Lin L, Acquaye A, Vera-Bolanos E, Gilbert M, Armstrong T, Lovely M, Sullivan D, Mueller S, Fullerton H, Stratton K, Leisenring W, Armstrong G, Weathers R, Stovall M, Goldsby R, Sklar C, Robison L, Krull K, Pace A, Villani V, Focarelli S, Benincasa D, Benincasa A, Carapella CM, Pompili A, Peiffer AM, Burke A, Leyer CM, Shing E, Kearns WT, Hinson WH, Case D, Rapp SR, Shaw EG, Chan MD, Porensky E, Cavaliere R, Newton H, Shilds A, Burgess S, Ravelo A, Taylor F, Mazar I, Abrey L, Rooney A, Graham C, McKenzie H, Fraser M, MacKinnon M, McNamara S, Rampling R, Carson A, Grant R, Rooney A, Heimans L, Woltz S, Kerrigan S, McNamara S, Grant R, Seibl-Leven M, Wittenstein K, Rohn G, Goldbrunner R, Timmer M, Kennedy J, Sherman W, Sen-Gupta I, Garic I, Macken M, Gerard E, Raizer J, Schuele S, Grontoft M, Stragliotto G, Taphoorn MJ, Henriksson R, Bottomley A, Cloughesy T, Wick W, Mason W, Saran F, Nishikawa R, Ravelo A, Hilton M, Chinot OL, Trad W, Simpson T, Wright K, Tran T, Choong C, Barton M, Hovey E, Robinson K, Koh ES, Vera-Bolanos E, Acquaye AA, Brown PD, Chung C, Gilbert MR, Vardy J, Armstrong TS, Walbert T, Mendoza T, Vera-Bolanos E, Gilbert M, Acquaye A, Armstrong T, Walbert T, Glantz M, Schultz L, Puduvalli VK, Oudenhoven M, Farin C, Hoffman R, Armstrong T, Ewend M, Wu J. SYMPTOM MANAGEMENT/QUALITY OF LIFE. Neuro Oncol 2013; 15:iii226-iii234. [PMCID: PMC3823907 DOI: 10.1093/neuonc/not192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2024] Open
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Tran M, Daly P, Tran T, Heathcote P. Renal cell carcinoma metastases to the spermatic cord: review of the literature and case presentation. JOURNAL OF CLINICAL UROLOGY 2013. [DOI: 10.1177/2051415813488360] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We present a case of clear cell renal cell carcinoma with metachronous metastasis to the ipsilateral spermatic cord. We also review the literature of the rare instance of renal cell carcinoma metastasising to the spermatic cord.
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Tran T, Small G, Cocker M, Yam Y, Chow BJW. A single slice measure of epicardial adipose tissue can serve as an indirect measure of total epicardial adipose tissue burden and is associated with obstructive coronary artery disease. Eur Heart J Cardiovasc Imaging 2013; 15:423-30. [DOI: 10.1093/ehjci/jet175] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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Wynne J, Modlin L, Fan A, Tran T, Schwartz M, Loo B, Diehn M. Analysis of Circulating Tumor Cells in Early Stage Non-Small Cell Lung Cancer Patients Treated With Stereotactic Ablative Radiation Therapy. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.517] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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120
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Hu K, Tran T, Wallach J, Lin W, Khorsandi A, Holliday R, Persky M, Urken M, Jacobson A, Harrison L. Prospective Multidisciplinary Treatment Algorithm for Head and Neck Paragangliomas. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.208] [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]
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Moreo A, Ambrosio G, De Chiara B, Tran T, Giannattasio C, Raman SV. Myocardial fibrosis severity and location: influence on diastolic dysfunction. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.1003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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122
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Kasymjanova G, Grossman M, Tran T, Jagoe RT, Cohen V, Pepe C, Small D, Agulnik J. The potential role for acupuncture in treating symptoms in patients with lung cancer: an observational longitudinal study. ACTA ACUST UNITED AC 2013; 20:152-7. [PMID: 23737683 DOI: 10.3747/co.20.1312] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Most lung cancer patients experience multiple symptoms related either to the disease or its treatment. The commonly reported symptoms are pain, depression, anxiety, nausea, and poor well-being. The aim of the present study was to evaluate the effect of acupuncture as a potential treatment modality in symptomatic lung cancer patients. METHODS This prospective observational study enrolled 33 lung cancer patients from the Peter Brojde Lung Cancer Centre between August 2010 and May 2012. All patients received 45-minute sessions of acupuncture, 1-2 times weekly for a minimum of 4 sessions. Symptom severity was assessed using the Edmonton Symptom Assessment System (esas) before and after completion of acupuncture. RESULTS The study cohort included 30 patients with non-small- cell lung cancer and 3 with small-cell lung cancer. Mean age was 62 years (range: 36-88 years); 17 of the patients were women. Most of the patients had advanced-stage cancer (73%) and good performance status (Eastern Cooperative Oncology Group 0-1: 88%). Of these patients, 67% received anticancer treatment (chemotherapy or radiotherapy, or both) with acupuncture. Of the remaining 10 patients, 8 received acupuncture after a complete surgical resection of their tumour, and because of their advanced age, 2 received acupuncture and best supportive care. The median number of acupuncture sessions was 7 (interquartile range: 4-13 sessions). Statistically significant improvements in pain, appetite, nausea, nervousness, and well-being were observed. A clinically important improvement (2 points on the esas) was reported by 61% of patients for pain and by 33% for well-being. A significant positive correlation between improved well-being and the number of acupuncture sessions was observed. This correlation remained significant even after controlling for treatment and narcotic use. Receiver operating characteristic analysis demonstrated that a minimum of 6 acupuncture sessions are required for a 70% chance of a clinically important improvement in well-being. CONCLUSIONS The present study is the first to demonstrate that acupuncture may be an effective approach for improving symptoms-in particular, pain and well-being-in lung cancer patients. Acupuncture is a safe and minimally invasive procedure, and it is potentially useful even in patients undergoing anticancer treatment.
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Tran T, Burt D, Eapen L, Keller OR. Spontaneous regression of metastatic melanoma after inoculation with tetanus-diphtheria-pertussis vaccine. ACTA ACUST UNITED AC 2013; 20:e270-3. [PMID: 23737697 DOI: 10.3747/co.20.1212] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Spontaneous regression of metastatic melanoma is an exceedingly rare event, with only 76 well-documented cases in the literature since 1866. Here, we present the case of a patient who developed metastatic melanoma despite interferon therapy and who then achieved spontaneous regression shortly after a reaction to tetanus-diphtheria-pertussis vaccination. A common theme among these cases is the development of febrile illness before remission of the malignant disease. A brief overview of proposed mechanisms for these miraculous recoveries is presented, including a highlight on the potential role of the herv-k-mel viral marker, a nona- or decapeptide that appears in most melanomas, with homologies to peptides in pathogenic microorganisms.
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Koné-Paut I, Darce Bello M, Shahram F, Ozen S, Cimaz R, Hofer M, Chkirate B, Bouayed K, Gattorno M, Anton J, Cantarini L, Faye A, Tugal-Tuktun I, Benamour S, Kümmerle-Deschner J, Arnoux A, Tran T. FRI0346 PED-BD, cohort study for paediatric behÇet’s disease: Update 2012 reporting 206 patients. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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125
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Rogé S, Van Reet N, Odiwuor S, Tran T, Schildermans K, Vandamme S, Vandenberghe I, Vervecken W, Gillingwater K, Claes F, Devreese B, Guisez Y, Büscher P. Recombinant expression of trypanosome surface glycoproteins in Pichia pastoris for the diagnosis of Trypanosoma evansi infection. Vet Parasitol 2013; 197:571-9. [PMID: 23747105 DOI: 10.1016/j.vetpar.2013.05.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2012] [Revised: 02/26/2013] [Accepted: 05/09/2013] [Indexed: 11/18/2022]
Abstract
Serodiagnosis of surra, which causes vast economic losses in livestock, is still based on native antigens purified from bloodstream form Trypanosoma (T.) evansi grown in rodents. To avoid the use of laboratory rodents in antigen preparation we expressed fragments of the invariant surface glycoprotein (ISG) 75, cloned from T. brucei gambiense cDNA, and the variant surface glycoprotein (VSG) RoTat 1.2, cloned from T. evansi gDNA, recombinantly in Pichia (P.) pastoris. The M5 strain of this yeast has an engineered N-glycosylation pathway resulting in homogenous Man5GlcNAc2 N-glycosylation which resembles the predominant Man9-5GlcNAc2 oligomannose structures in T. brucei. The secreted recombinant antigens were affinity purified with yields of up to 10mg and 20mg per liter cell culture of rISG 7529-465-E and rRoTat 1.223-385-H respectively. In ELISA, both recombinant proteins discriminated between pre-immune and immune serum samples of 25 goats experimentally infected with T. evansi. The diagnostic potential of rRoTat 1.223-385-H but not of rISG 7529-465-E was confirmed with sera of naturally infected and control dromedary camels. The results suggest that rRoTat 1.223-385-H expressed in P. pastoris requires further evaluation before it could replace native RoTat 1.2 VSG for serodiagnosis of surra, thus eliminating the use of laboratory animals for antigen production.
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