154 results on '"Xavier, M."'
Search Results
2. Medullary Thyroid Cancer: Single Institute Experience Over 3 Decades and Risk Factors for Recurrence
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Abou Azar, Sara, Tobias, Joseph, Applewhite, Megan, Angelos, Peter, and Keutgen, Xavier M
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- 2024
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3. Human Conjunctival Transcriptome in AcanthamoebaKeratitis: An Exploratory Study
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Seitzman, Gerami D., Keenan, Jeremy D., Lietman, Thomas M., Ruder, Kevin, Zhong, Lina, Chen, Cindi, Liu, YuHeng, Yu, Danny, Abraham, Thomas, Hinterwirth, Armin, Doan, Thuy, Seitz, Berthold, Flockerzi, Elias, Daas, Loay, Hamon, Loïc, Bofferding, Max, Berger, Tim, Dail, Yaser Abu, Livny, Eitan, Bahar, Irit, Goren, Lee, Sella, Ruti, Misanjo, Esther, Likongwe, Hendrix, Kalua, Khumbo, Núñez Amaro, Carlos Daniel, Martínez, Jaime Macías, Pérez Pérez, Jose Fernando, Lansingh, Van Charles, Amza, Abdou, Youssouffou Souley, Abdoul Salam, Bachabi, Abdourahame, Diori, Adam Nouhou, Zakari, Adamou, Atto, Aichatou, Hamidou, Bagna, Yacouba, Barazé, Yahaya, Bonkano, Sofo, Fatouma, Abba Kaka, Hadjia Yakoura, Bouba Traore, Hassane Amadou, Laouali, Ibrahim Mahaman, Saadou, Issa, Laouali, Kakale, Roufaye, Lamyne, Laminou, Laouali, Sani, Magagi Mamane, Ibrahim, Mahaman, Boubacar, Mariama, Soumana, Mariama, Yacouba, Mayaki Moctar, Hassane, Mijitaba, Issiakou, Moctar, Salifou, Moumouni, Boubacar, Nameywa, Boulhassane, Ramatou, Abdoulaye, Sadiaa, Ali, Seley, Soumana, Yaboubou, Abdou, Zakou, Ong, Hon Shing, Mehta, Jodhbir S., Liu, Yu-Chi, Hollhumer, Roland, Bograd, Alexandra, Tappeiner, Christoph, Goldblum, David, Fan, Nai-Wen, Sangsao, Keeratika, Chokesuwattanaskul, Susama, Satitpitakul, Vannarut, Sansanayudh, Wiwan, Serrano, Andres, Trief, Danielle, Rand, Gabriel, Florakis, George J., Kim, Janice, Suh, Leejee H., Zaffos, Joshua, Potts, Luke, Hirabayashi, Kristin, Redd, Travis, Gang, Anjulie M., Carli, David G., Price, Francis W., Dudasko, Kathleen N., Price, Marianne O., Feng, Matthew T., Mortensen, Xavier M., Berkowitz, Carla, Tsui, Edmund, Patarajierapun, Promporn, Fung, Simon S. M., Yu, Carol, McClean, Esmeralda, Kim, Philip, Hinterwirth, Armin, Chen, Cindi, Yan, Daisy, Yu, Danny, Lebas, Elodie, Seitzman, Gerami D., Ouimette, Kevin, Zhong, Lina, Deiner, Michael S., Abraham, Thomas, Lietman, Thomas M., Doan, Thuy, Porco, Travis C., Liu, Yuheng, Lin, Amy, Zaugg, Brian, Nuttall, Elizabeth, Gutierrez, Karen, Hu, Katherine S., Kurt, Kevin, Nehls, Sarah, Enright, Jennifer, Walia, Jessica, Thulasi, Praneetha, and McKie, George A.
- Abstract
Supplemental Digital Content is Available in the Text.
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- 2024
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4. Additively Manufactured Silicone Polymer Composite with High Hydrogen Getter Content and Hydrogen Absorption Capacity.
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Adhikari, Santosh, Safarik, Douglas J., Stockdale, John R., Torres, Xavier M., Pacheco, Adam, Legett, Shelbie A., and Labouriau, Andrea
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- 2024
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5. Clinical utility of a microRNA classifier in cytologically indeterminate thyroid nodules with RAS mutations: A multi-institutional study.
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Tumati, Abhinay, Egan, Caitlin E., Lee-Saxton, Yeon J., Marshall, Teagan E., Lee, Joyce, Jain, Kavita, Heymann, Jonas J., Gokozan, Hamza, Azar, Sara Abou, Schwarz, Jason, Keutgen, Xavier M., Laird, Amanda M., Beninato, Toni, Zarnegar, Rasa, Fahey III, Thomas J., and Finnerty, Brendan M.
- Abstract
Molecular testing guides the management of cytologically indeterminate thyroid nodules. We evaluated the real-world clinical benefit of a commercially available thyroid mutation panel plus microRNA risk classifier in classifying RAS -mutated nodules. We performed a subgroup analysis of the results of molecular testing of Bethesda III/IV nodules using the ThyGenX/ThyGeNEXT–ThyraMIR platform at 3 tertiary-care centers between 2017 and 2021, defining a positive result as 10% or greater risk of malignancy. We identified 387 nodules from 375 patients (70.7% female, median age 59.3 years) who underwent testing. Positive nodules (32.3%) were associated with increased surgical intervention (74.4% vs 14.9%, P <.0001) and carcinoma on surgical pathology (46.4% vs 3.4%, P <.0001) compared to negative modules. RAS mutations were the most common mutations, identified in 71 of 380 (18.7%) nodules, and were classified as ThyraMIR– (28 of 71; 39.4%) or ThyraMIR+ (43 of 71; 60.6%). Among RAS- mutated nodules, there was no significant difference in operative rate (P =.2212) or carcinoma diagnosis (P =.6277) between the ThyraMIR+ and ThyraMIR– groups, and the sensitivity, specificity, negative predictive value, and positive predictive value of ThyraMIR were 64.7%, 34.8%, 40.0%, and 59.5%, respectively. Although testing positive is associated with malignancy in surgical pathology, the ThyraMIR classifier failed to differentiate between benign and malignant RAS -mutated nodules. Diagnostic lobectomy should be considered for RAS -mutated nodules, regardless of microRNA expression status. [ABSTRACT FROM AUTHOR]
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- 2024
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6. What 'Fiducia Supplicans' Has Changed.
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MONTECEL, XAVIER M.
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The article discusses the Vatican's new declaration on the blessing of same-sex couples, highlighting its significance for LGBTQ Catholics. It explores the doctrinal implications of the declaration, its departure from previous teachings, and its prioritization of pastoral care over doctrinal enforcement. It also examines the theological reasoning behind the Vatican's stance on blessing same-sex couples, comparing it to previous statements and proposing a broader understanding of blessings.
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- 2024
7. Liturgy, Virtue, and the Foundations of an Ecclesial Ethic
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Montecel, Xavier M.
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abstract:The connection between liturgy and ethics has been an explicit subject of interest among Christian theologians since the second half of the twentieth century. However, most calls for a substantive integration of worship and Christian morality have proceeded in a single direction. Liturgy provides the foundations of an ecclesial ethic that is directed primarily outward as a witness to the world. A troubling consequence of this general approach to linking liturgy and ethics is that the church, situated in an iconic or kerygmatic role, rarely turns its ethical attention inward. In this essay, I offer a reading of the relationship between liturgy and ethics that may begin to overcome these limitations. In dialogue with Orthodox theologians Alexander Schmemann and Vigen Guroian, I propose a renewed emphasis on the eschatological dimension of eucharistic liturgy that, when theorized through the lens of virtue ethics, can yield a more dynamic, inward-facing ecclesial ethic.
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- 2022
8. Preoperative serum chromogranin-a is predictive of survival in locoregional jejuno-ileal small bowel neuroendocrine tumors.
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Chatani, Praveen D., Aversa, John G., McDonald, James D., Khan, Tahsin M., Keutgen, Xavier M., and Nilubol, Naris
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Small bowel neuroendocrine tumors (SB-NET) frequently metastasize to regional lymphatic or distant sites. Although most prognostication of SB-NET focuses on lymph node involvement, findings from studies of neuroendocrine tumors from other primary sites have suggested that preoperative serum chromogranin-A (CgA) levels may provide a more accurate metric. Using the National Cancer Database (2004-2016), we analyzed patients with locoregional SB-NET who underwent curative resection including an adequate lymphadenectomy (n = 1,274). A statistically optimized cut-point was used to dichotomize CgA cohort based on preoperative serum CgA levels. We determined that a CgA ≥139 ng/mL identified patients with significantly shorter estimated mean overall survival (6.6 years vs 7.6 years, log-rank P =.00001). These patients were also older (63 vs 57 years, P <.001) and had higher rates of poorly differentiated tumors (2.1% vs 0.7%, P =.04) or primary tumors >1 cm (88.2% vs 79.2%, P =.001). Clinical features associated with shorter overall survival included preoperative CgA ≥139 ng/mL (HR = 2.19, 95% CI 1.22–3.92; P =.009), age at diagnosis (HR = 1.06, 95% CI 1.03–1.09; P <.001), Charlson-Deyo score ≥2 (HR = 3.93, 95% CI 1.71–9.01; P =.001), and poorly differentiated tumors (HR = 11.22, 95% CI 4.16–30.24; P <.001). Neither lymph node metastasis nor T-stage were independently associated with shorter overall survival in patients with locoregional SB-NET. Elevated preoperative serum CgA is an adverse prognostic marker associated with shorter overall survival in patients with locoregional SB-NET. [ABSTRACT FROM AUTHOR]
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- 2021
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9. The Viking Press
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Ghigiarelli, Jamie J., Berrios, Xavier M., Prendergast, James M., Gonzalez, Adam M., and Dawes, Jay
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Supplemental Digital Content is Available in the Text.The Viking press exercise is an upper-body strength and power movement with several potential benefits for athletes. The aim of this article is to describe proper exercise technique and introduce variations for the Viking press.
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- 2021
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10. Glutaraldehyde-crosslinked cells from Aspergillus oryzaeIPT-301 for high transfructosylation activity: optimization of the immobilization variables, characterization and operational stability
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Garcia, R. L., Dias, G. S., Morales, S. A. V., Xavier, M. C. A., Silva, E. S., Maiorano, A. E., Tardioli, P. W., and Perna, R. F.
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Cells of Aspergillus oryzaeIPT-301 rich in fructosyltransferase (FTase) were successfully immobilized by crosslinking with glutaraldehyde and used for the transfructosylation reaction of sucrose. The glutaraldehyde concentration and pH used in the immobilization process were optimized for maximizing the transfructosylation activity (AT) and minimizing the hydrolytic activity (AH). Also, the operational stability and the influence of temperature, pH and sucrose concentration on the enzymatic activities of the free and crosslinked cells were evaluated. Both the maximum ATand minimum AHwere obtained for cells immobilized with glutaraldehyde concentration of 2.1% (v/v) and pH 7.9. Crosslinked cells showed considerably higher AT/AHratio than free cells at several temperatures, pH and sucrose concentrations in the reaction media. Kinetics data suggested that crosslinked cells present higher substrate-enzyme affinity and transfructosylation rate than free cells. Furthermore, after 12 batch reaction cycles the FTase present in the immobilized cell kept 88.9% of its initial AT, demonstrating a considerably higher operational stability than the FTase present in the free cell, which showed 50.3% of its initial AT. These results suggest the potential use of crosslinked cells of Aspergillus oryzaeIPT-301 for the large-scale production of fructooligosaccharides (FOS).
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- 2021
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11. Antiproliferative activity of essential oils from three plants of the Brazilian Cerrado: Campomanesia adamantium (Myrtaceae), Protium ovatum (Burseraceae) and Cardiopetalum calophyllum (Annonaceae).
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Alves, C. C. F., Oliveira, J. D., Estevam, E. B. B., Xavier, M. N., Nicolella, H. D., Furtado, R. A., Tavares, D. C., and Miranda, M. L. D.
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ESSENTIAL oils ,ANNONACEAE ,MYRTACEAE ,AROMATIC plants ,CULTIVARS ,MASS spectrometry ,GAS chromatography - Abstract
Copyright of Brazilian Journal of Biology is the property of Instituto Internacional de Ecologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2020
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12. Operative resection in early stage pancreatic neuroendocrine tumors in the United States: Are we over- or undertreating patients?
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Chivukula, Sitaram V., Tierney, John F., Hertl, Martin, Poirier, Jennifer, and Keutgen, Xavier M.
- Abstract
Many current guidelines recommend nonoperative management for pancreatic neuroendocrine tumors <2 cm. The objective of this study was to evaluate the utilization and outcomes of resection for these pancreatic neuroendocrine tumors in the United States. Using the National Cancer Database (2004–2014), 3,243 cases of T1 (≤2.0 cm) pancreatic neuroendocrine tumors were identified. Additional patient and tumor characteristics were examined. Multivariate models were used to identify factors that predicted resection and to assess patient survival after resection. 75% of pancreatic neuroendocrine tumors measuring 0 to 1.0 cm and 80% of pancreatic neuroendocrine tumors measuring >1.0 and ≤2.0 cm were resected. Eighty-four pancreatic neuroendocrine tumors were functional, of which 82% were resected. Variables influencing resection included positive lymph nodes, tumor in body or tail of pancreas, well or moderately differentiated tumors, and resection at academic medical centers (odds ratio 1.5–4.9). When controlling for other variables, patients with pancreatic neuroendocrine tumors 1 to 2 cm who underwent resection had a prolonged 5-year survival rate (hazard ratio 0.51, confidence interval 0.34–0.75) when compared with those who did not undergo resection. This survival benefit of resection was not found for pancreatic neuroendocrine tumors 0 to 1 cm (hazard ratio = 0.63, confidence interval 0.36–1.11). Contrary to many current recommendations, most patients with pancreatic neuroendocrine tumors ≤2.0 cm undergo surgical resection in the United States. A survival benefit was found for resection of pancreatic neuroendocrine tumors 1 to 2 cm, suggesting that current recommendations should perhaps be revised. [ABSTRACT FROM AUTHOR]
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- 2020
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13. Deep learning prediction of BRAF-RAS gene expression signature identifies noninvasive follicular thyroid neoplasms with papillary-like nuclear features
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Dolezal, James M., Trzcinska, Anna, Liao, Chih-Yi, Kochanny, Sara, Blair, Elizabeth, Agrawal, Nishant, Keutgen, Xavier M., Angelos, Peter, Cipriani, Nicole A., and Pearson, Alexander T.
- Abstract
Noninvasive follicular thyroid neoplasms with papillary-like nuclear features (NIFTP) are follicular-patterned thyroid neoplasms defined by nuclear atypia and indolent behavior. They harbor RASmutations, rather than BRAFV600Emutations as is observed in papillary thyroid carcinomas with extensive follicular growth. Reliably identifying NIFTPs aids in safe therapy de-escalation, but has proven to be challenging due to interobserver variability and morphologic heterogeneity. The genomic scoring system BRS (BRAF-RAS score) was developed to quantify the extent to which a tumor’s expression profile resembles a BRAFV600Eor RAS-mutant neoplasm. We proposed that deep learning prediction of BRS could differentiate NIFTP from other follicular-patterned neoplasms. A deep learning model was trained on slides from a dataset of 115 thyroid neoplasms to predict tumor subtype (NIFTP, PTC-EFG, or classic PTC), and was used to generate predictions for 497 thyroid neoplasms within The Cancer Genome Atlas (TCGA). Within follicular-patterned neoplasms, tumors with positive BRS (RAS-like) were 8.5 times as likely to carry an NIFTP prediction than tumors with negative BRS (89.7% vs 10.5%, P< 0.0001). To test the hypothesis that BRS may serve as a surrogate for biological processes that determine tumor subtype, a separate model was trained on TCGA slides to predict BRS as a linear outcome. This model performed well in cross-validation on the training set (R2= 0.67, dichotomized AUC = 0.94). In our internal cohort, NIFTPs were near universally predicted to have RAS-like BRS; as a sole discriminator of NIFTP status, predicted BRS performed with an AUC of 0.99 globally and 0.97 when restricted to follicular-patterned neoplasms. BRAFV600E-mutant PTC-EFG had BRAFV600E-like predicted BRS (mean −0.49), nonmutant PTC-EFG had more intermediate predicted BRS (mean −0.17), and NIFTP had RAS-like BRS (mean 0.35; P< 0.0001). In summary, histologic features associated with the BRAF-RAS gene expression spectrum are detectable by deep learning and can aid in distinguishing indolent NIFTP from PTCs.
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- 2021
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14. Deep learning prediction of BRAF-RAS gene expression signature identifies noninvasive follicular thyroid neoplasms with papillary-like nuclear features
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Dolezal, James M., Trzcinska, Anna, Liao, Chih-Yi, Kochanny, Sara, Blair, Elizabeth, Agrawal, Nishant, Keutgen, Xavier M., Angelos, Peter, Cipriani, Nicole A., and Pearson, Alexander T.
- Abstract
Noninvasive follicular thyroid neoplasms with papillary-like nuclear features (NIFTP) are follicular-patterned thyroid neoplasms defined by nuclear atypia and indolent behavior. They harbor RASmutations, rather than BRAFV600Emutations as is observed in papillary thyroid carcinomas with extensive follicular growth. Reliably identifying NIFTPs aids in safe therapy de-escalation, but has proven to be challenging due to interobserver variability and morphologic heterogeneity. The genomic scoring system BRS (BRAF-RAS score) was developed to quantify the extent to which a tumor's expression profile resembles a BRAFV600Eor RAS-mutant neoplasm. We proposed that deep learning prediction of BRS could differentiate NIFTP from other follicular-patterned neoplasms. A deep learning model was trained on slides from a dataset of 115 thyroid neoplasms to predict tumor subtype (NIFTP, PTC-EFG, or classic PTC), and was used to generate predictions for 497 thyroid neoplasms within The Cancer Genome Atlas (TCGA). Within follicular-patterned neoplasms, tumors with positive BRS (RAS-like) were 8.5 times as likely to carry an NIFTP prediction than tumors with negative BRS (89.7% vs 10.5%, P< 0.0001). To test the hypothesis that BRS may serve as a surrogate for biological processes that determine tumor subtype, a separate model was trained on TCGA slides to predict BRS as a linear outcome. This model performed well in cross-validation on the training set (R2= 0.67, dichotomized AUC = 0.94). In our internal cohort, NIFTPs were near universally predicted to have RAS-like BRS; as a sole discriminator of NIFTP status, predicted BRS performed with an AUC of 0.99 globally and 0.97 when restricted to follicular-patterned neoplasms. BRAFV600E-mutant PTC-EFG had BRAFV600E-like predicted BRS (mean −0.49), nonmutant PTC-EFG had more intermediate predicted BRS (mean −0.17), and NIFTP had RAS-like BRS (mean 0.35; P< 0.0001). In summary, histologic features associated with the BRAF-RAS gene expression spectrum are detectable by deep learning and can aid in distinguishing indolent NIFTP from PTCs.
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- 2021
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15. Long-Term Follow-Up of the First in Human Intravascular Delivery of AAV for Gene Transfer: AAV2-hFIX16 for Severe Hemophilia B
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George, Lindsey A., Ragni, Margaret V., Rasko, John E.J., Raffini, Leslie J., Samelson-Jones, Benjamin J., Ozelo, Margareth, Hazbon, Maria, Runowski, Alexa R., Wellman, Jennifer A., Wachtel, Katie, Chen, Yifeng, Anguela, Xavier M., Kuranda, Klaudia, Mingozzi, Federico, and High, Katherine A.
- Abstract
Adeno-associated virus (AAV) vectors are a leading platform for gene-based therapies for both monogenic and complex acquired disorders. The success of AAV gene transfer highlights the need to answer outstanding clinical questions of safety, durability, and the nature of the human immune response to AAV vectors. Here, we present longitudinal follow-up data of subjects who participated in the first trial of a systemically delivered AAV vector. Adult males (n = 7) with severe hemophilia B received an AAV2 vector at doses ranging from 8 × 1010to 2 × 1012vg/kg to target hepatocyte-specific expression of coagulation factor IX; a subset (n = 4) was followed for 12–15 years post-vector administration. No major safety concerns were observed. There was no evidence of sustained hepatic toxicity or development of hepatocellular carcinoma as assessed by liver transaminase values, serum α-fetoprotein, and liver ultrasound. Subjects demonstrated persistent, increased AAV neutralizing antibodies (NAbs) to the infused AAV serotype 2 (AAV2) as well as all other AAV serotypes tested (AAV5 and AAV8) for the duration of follow-up. These data represent the longest available longitudinal follow-up data of subjects who received intravascular AAV and support the preliminary safety of intravascular AAV administration at the doses tested in adults. Data demonstrate, for the first time, the persistence of high-titer, multi-serotype cross-reactive AAV NAbs for up to 15 years post- AAV vector administration. Our observations are broadly applicable to the development of AAV-mediated gene therapy.
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- 2020
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16. IgG-cleaving endopeptidase enables in vivo gene therapy in the presence of anti-AAV neutralizing antibodies
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Leborgne, Christian, Barbon, Elena, Alexander, Jeffrey M., Hanby, Hayley, Delignat, Sandrine, Cohen, Daniel M., Collaud, Fanny, Muraleetharan, Saghana, Lupo, Dan, Silverberg, Joseph, Huang, Karen, van Wittengerghe, Laetitia, Marolleau, Béatrice, Miranda, Adeline, Fabiano, Anna, Daventure, Victoria, Beck, Heena, Anguela, Xavier M., Ronzitti, Giuseppe, Armour, Sean M., Lacroix-Desmazes, Sebastien, and Mingozzi, Federico
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Neutralizing antibodies to adeno-associated virus (AAV) vectors are highly prevalent in humans1,2, and block liver transduction3–5and vector readministration6; thus, they represent a major limitation to in vivo gene therapy. Strategies aimed at overcoming anti-AAV antibodies are being studied7, which often involve immunosuppression and are not efficient in removing pre-existing antibodies. Imlifidase (IdeS) is an endopeptidase able to degrade circulating IgG that is currently being tested in transplant patients8. Here, we studied if IdeS could eliminate anti-AAV antibodies in the context of gene therapy. We showed efficient cleavage of pooled human IgG (intravenous Ig) in vitro upon endopeptidase treatment. In mice passively immunized with intravenous Ig, IdeS administration decreased anti-AAV antibodies and enabled efficient liver gene transfer. The approach was scaled up to nonhuman primates, a natural host for wild-type AAV. IdeS treatment before AAV vector infusion was safe and resulted in enhanced liver transduction, even in the setting of vector readministration. Finally, IdeS reduced anti-AAV antibody levels from human plasma samples in vitro, including plasma from prospective gene therapy trial participants. These results provide a potential solution to overcome pre-existing antibodies to AAV-based gene therapy.
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- 2020
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17. Surgical Management of Pancreatic Neuroendocrine Tumors
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Vaghaiwalla, Tanaz and Keutgen, Xavier M.
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Surgical management of pancreatic neuroendocrine tumors (PNETS) is steadily evolving and is influenced by multiple factors. Sporadic PNETs are generally managed more aggressively than those occurring in the background of hereditary syndromes, and functioning PNETs are almost always resected if they are not metastatic. Localized nonfunctioning PNETs less than 2 cm can often be observed. Surgical resection for localized PNET greater than 2 cm comprises parenchymal sparing pancreas resections, such as enucleations, or formal anatomic resection, such as distal pancreatectomy or pancreaticoduodenectomy. PNETs commonly metastasize to the liver, and several systemic and liver-directed options to treat hepatic metastases are available.
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- 2020
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18. The North American Neuroendocrine Tumor Society Consensus Paper on the Surgical Management of Pancreatic Neuroendocrine Tumors
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Howe, James R., Merchant, Nipun B., Conrad, Claudius, Keutgen, Xavier M., Hallet, Julie, Drebin, Jeffrey A., Minter, Rebecca M., Lairmore, Terry C., Tseng, Jennifer F., Zeh, Herbert J., Libutti, Steven K., Singh, Gagandeep, Lee, Jeffrey E., Hope, Thomas A., Kim, Michelle K., Menda, Yusuf, Halfdanarson, Thorvardur R., Chan, Jennifer A., and Pommier, Rodney F.
- Abstract
This manuscript is the result of the North American Neuroendocrine Tumor Society consensus conference on the surgical management of pancreatic neuroendocrine tumors from July 19 to 20, 2018. The group reviewed a series of questions of specific interest to surgeons taking care of patients with pancreatic neuroendocrine tumors, and for each, the available literature was reviewed. What follows are these reviews for each question followed by recommendations of the panel.
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- 2020
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19. Applicability of the Platelia EIA® Aspergillus test for the diagnosis of aspergilosis in penguins.
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Cabana, A. L., Xavier, M. O., Mendes, J. F., Teles, A. J., Martins, A. M., Silva-Filho, R. P., and Meireles, M. C. A.
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GENETICALLY modified foods ,PENGUINS ,DIAGNOSIS - Abstract
Copyright of Brazilian Journal of Biology is the property of Instituto Internacional de Ecologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
- Full Text
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20. Resection of primary tumor may prolong survival in metastatic gastroenteropancreatic neuroendocrine tumors.
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Tierney, John F., Chivukula, Sitaram V., Wang, Xuanji, Pappas, Sam G., Schadde, Erik, Hertl, Martin, Poirier, Jennifer, and Keutgen, Xavier M.
- Abstract
Background Patients with gastroenteropancreatic neuroendocrine tumors often present with stage IV disease. Primary tumor resection in these patients remains controversial. Herein, we studied the impact of primary tumor removal, identified variables associated with prolonged survival for each neuroendocrine tumor subtype, and determined factors that influence surgeons to perform primary tumor resection. Methods Patients with metastatic gastroenteropancreatic neuroendocrine tumors diagnosed from 2004 to 2014 were identified from the National Cancer Database. Nested Cox proportional hazards and logistic regression models were used to assess variables associated with survival and primary resection. Results A total of 14,510 patients met inclusion criteria. On multivariable analysis, resection of the primary tumor and grade 1 or 2 tumors was associated with prolonged survival in all subtypes (P <.001). Organ-specific variables associated with prolonged survival in patients undergoing primary tumor resection included the following: low grade for all organs; young age for pancreatic, small intestinal, colonic, and rectal neuroendocrine tumor; tumor size for colonic and rectal neuroendocrine tumor; and tumor location for colonic neuroendocrine tumor. Low tumor grade was found to be significantly associated with removal of the primary tumor across all organs. Conclusion This study is the first suggesting that primary tumor resection is associated with prolonged survival for all gastro-entero-pancreatic NETs. Additional variables related to survival for each NET subtype were identified and might help select patients who benefit from primary tumor removal. [ABSTRACT FROM AUTHOR]
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- 2019
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21. 68Gallium-DOTATATE positron emission tomography–computed tomography (PET CT) changes management in a majority of patients with neuroendocrine tumors.
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Tierney, John F., Kosche, Cory, Schadde, Erik, Ali, Amjad, Virmani, Sumeet, Pappas, Sam G., Poirier, Jennifer, and Keutgen, Xavier M.
- Abstract
Abstract Background
68 Gallium-DOTATATE positron emission tomography–computed tomography (PET CT) has shown superior accuracy in detecting grade 1 and 2 neuroendocrine tumors over previous imaging modalities and was recently included in National Comprehensive Cancer Network guidelines. It remains unclear which patients benefit most from this imaging modality. We therefore reviewed our initial experience with68 Gallium-DOTATATE PET CT to evaluate its usefulness in diagnosing, staging, and surveilling neuroendocrine tumors. Methods Records of patients who underwent68 Gallium-DOTATATE PET CT from March to December 2017 were prospectively evaluated. The primary endpoint was whether68 Gallium-DOTATATE PET CT changes treatment in patients with neuroendocrine tumors. Descriptive statistics, Fisher exact tests, and nested logistic regressions were conducted. Results A total of 50 consecutive patients were included. Of these, 41 patients (82%) had a biopsy-proven neuroendocrine tumor at the time of imaging. The remaining 9 patients (18%) had symptoms or biochemistry suggestive of a neuroendocrine tumor with negative cross-sectional imaging.68 Gallium-DOTATATE PET CT changed management in 33 patients (66%). There were 24 patients with intermodality changes in management and 9 patients with intramodality changes in management. Patients with scans performed for staging had a higher likelihood of a change in management (P =.006). Conclusion Performing68 Gallium-DOTATATE PET CT should be considered for staging and surveillance of neuroendocrine tumors because it is frequently associated with changes in management. [ABSTRACT FROM AUTHOR]- Published
- 2019
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22. Expression of programmed death ligand 1 and 2 in adrenocortical cancer tissues: An exploratory study.
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Tierney, John F., Vogle, Alyx, Poirier, Jennifer, Min, Irene M., Finnerty, Brendan, Zarnegar, Rasa, Pappas, Sam G., Scognamiglio, Theresa, Ghai, Ritu, Gattuso, Paolo, Fahey III, Thomas J., and Keutgen, Xavier M.
- Abstract
Abstract Background Inhibition of the interaction of programmed death 1 with programmed death ligand 1 and 2 has been used successfully for treatment of multiple advanced cancers, but expression has not been studied in adrenocortical carcinoma. In this study, we investigated programmed death ligand 1 and 2 expression in adrenocortical carcinoma to determine the potential usefulness of checkpoint inhibitors in these malignant neoplasms. Methods A total of 56 tissue samples from patients with adrenocortical carcinoma (34) and benign adrenal tissues (22) were identified. Immunohistochemistry was performed for programmed death ligand 1, programmed death ligand 2, and CD8 and scored for membranous staining on adrenal and stromal tissue according to the immunoreactive score and absolute percentage, respectively. Descriptive statistics, a Mann-Whitney U test, and Fisher exact tests were calculated. Results In total, 15 adrenocortical carcinoma (44%) stained positive for programmed death ligand 2 and 1 adrenocortical carcinoma for programmed death ligand 1 (P =.03). Adrenocortical carcinoma samples were more likely to express programmed death ligand 2 on tumor cells or in stromal tissues than benign samples (OR = 2.3, P =.03). There was no relationship between programmed death ligand 2 and CD8 expression (P =.08). There were also no relationships between programmed death ligand 2 or CD8 expression and tumor characteristics. Conclusion Programmed death ligand 2, but not programmed death ligand 1, is expressed commonly in adrenocortical carcinoma samples. The utility of certain checkpoint inhibitors should, therefore, be evaluated in further studies. [ABSTRACT FROM AUTHOR]
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- 2019
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23. Diagnostics and Imaging for Pancreatic Neuroendocrine Tumors
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Tobias, Joseph and Keutgen, Xavier M.
- Abstract
Pancreatic neuroendocrine tumors originate from hormone-producing islet cells and have a propensity to metastasize to the liver once they reach 2 cm in size. Their diagnosis relies upon a combination of computed tomography, MRI, DOTATATE PET, and endoscopic ultrasound with or without tissue biopsy. Biochemical work-up is driven by patient symptoms of hormone excess.
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- 2024
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24. Hemophilia B and Gene Therapy: A New Chapter with Etranacogene Dezaparvovec
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Anguela, Xavier M. and High, Katherine A.
- Abstract
The FDA’s authorization of Hemgenix® is a significant milestone, constituting not only the first FDA approval of a gene therapy for hemophilia but also the first approval of a liver-targeted AAV gene therapy. This review summarizes the non-clinical studies and clinical development that supported regulatory clearance. Similar to other gene therapies for single gene disorders, both the short-term safety and the phenotypic improvement were unequivocal, justifying the modest-sized safety and efficacy database, which included fifty-seven participants across the Phase 2b (3 participants) and Phase 3 (54 participants) studies. The most common adverse reactions included liver enzyme elevation, headache, flu-like symptoms, infusion-related reactions, creatine kinase elevation, malaise and fatigue; these were mostly transient. One participant was found to have hepatocellular carcinoma on a study-mandated liver ultrasound conducted one year post-vector infusion; molecular analysis of the resected tumor showed no evidence of vector-related insertional mutagenesis as the etiology. A remarkable 96% of participants in the Phase 3 trial were able to stop FIX prophylaxis, with the study demonstrating both non-inferiority and superiority to factor IX prophylaxis in terms of the primary endpoint, annualized bleeding rate. Key secondary endpoints such as the annualized infusion rate —which declined by 97%— and the plasma factor IX activity level at 18 months post-infusion —least squares mean increase of 34.3 percentage points compared to baseline— were both clinically and statistically significant. The FDA's landmark approval of Hemgenix® as a pioneering treatment for hemophilia stands on the shoulders of over 20 years of gene therapy clinical research and heralds a promising future for genomic medicines.
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- 2024
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25. Características eletrocardiográficas de éguas da raça Crioula em diferentes fases do período gestacional.
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Casa, G., Oliveira, M. D., Regianini, C. R., Lovatel, M., Cancelier, C. D. L., Xavier, M. G. N., Volpato, J., Saito, M. E., and Yonezawa, L. A.
- Abstract
Pregnancy can cause several physiologic changes in mares, including modifications in cardiac output and heart positioning. Therefore, these changes could influence electrocardiographic parameters in various stages of pregnancy. This study aimed to evaluate the electrocardiogram of Crioulo mares in different pregnancy stages. Nine non pregnant mares (G0), 11 mares at three months (G3), 11 mares at six months (G6) and 11 mares at 10 months of pregnancy (G10) were submitted to electrocardiographic evaluation. There was higher (P= 0,002) heart rate of G10 (60.45±12.16bpm) when compared to other groups (G0=45.67±10.75bpm; G3=44.91±7.91bpm; G6=46.91±9.12bpm), probably because of an increase in cardiac output to uterine perfusion at the end of pregnancy. Normal sinus rhythm was predominant in most of mares of groups G0, G3 and G6, and sinus tachycardia in most of G10 mares. In conclusion, changes in hemodynamics and in cardiac position can influence on the electrocardiogram of pregnant Crioulo mares, but do not cause relevant rhythm or conduction disturbs. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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- View/download PDF
26. Social networks in fitness centres: the impact of fan engagement on annual turnover.
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GARCÍA-FERNÁNDEZ, JERÓNIMO, ELASRI-EIJABERI, AMAL, PÉREZ-TUR, FERNANDO, TRIADÓ-IVERN, XAVIER M., HERRERA-TORRES, LUCÍA, and APARICIO-CHUECA, PILAR
- Abstract
Few studies to date discuss the use of social networks or examine whether they have a positive impact on user engagement and the turnover of sports entities. This study aims to analyse the use of social networks (that is, the number of fans/followers) by the 194 companies belonging to code 9313 of the National Classification of Economic Activities in Spain; to analyse the corresponding of engagement on Facebook and Twitter; and, to examine the relationship between this engagement and the annual turnover of each company. The results indicate that these companies use ten social networks (Facebook and Twitter being the most common) and that a positive relationship exists between the number of fans/followers and their engagement and the revenue of the fitness centres. This study shows that social networks should form part of the marketing strategies of sports entities, as they generate good content and value via their posts, so that users who are fans/followers have a greater sense of belonging to these centres. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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27. Metastatic neuroendocrine tumors of the gastrointestinal tract and pancreas: A surgeon's plea to centering attention on the liver
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Keutgen, Xavier M., Schadde, Erik, Pommier, Rodney F., Halfdanarson, Thorvardur R., Howe, James R., and Kebebew, Electron
- Abstract
Over 50% of patients with gastroenteropancreatic neuroendocrine tumors (GEP-NETs) have stage IV disease at presentation and the most likely organ to be affected by metastases is the liver. Hepatic involvement and hepatic tumor burden is a key prognostic factor affecting survival of these patients and 80% eventually die of liver failure due to tumor dissemination within the liver. This commentary explores the efficacy and limitations of systemic treatments in patients with GEP-NETs and liver metastases. Landmark randomized trials using systemic therapies including sandostatin (PROMID), lanreotide (CLARINET), everolimus (RADIANT 3 and 4), sunitinib and Peptide Receptor Radionuclide Therapy (NETTER-1) have not shown efficacy in reducing liver tumor burden in patients with stage IV GEP-NETs with liver metastases as outlined in this review. Although often overlooked, surgical debulking has been associated with a significant survival advantage in large retrospective studies and in our opinion should remain an important therapeutic option for patients with stage IV GEP-NETs and liver metastases.
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- 2018
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28. In silico VHL Gene Mutation Analysis and Prognosis of Pancreatic Neuroendocrine Tumors in von Hippel-Lindau Disease.
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Tirosh, Amit, El Lakis, Mustapha, Green, Patience, Nockel, Pavel, Patel, Dhaval, Nilubol, Naris, Gara, Sudheer Kumar, Keutgen, Xavier M, Linehan, W Marston, and Kebebew, Electron
- Abstract
Patients with von Hippel-Lindau (vHL) disease caused by a missense VHL mutation have a more severe phenotype compared with other VHL mutation types.
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- 2018
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29. Platelet indices in dogs with thrombocytopenia and dogs with normal platelet counts.
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Souza, A. M., Pereira, J. J., Campos, S. D. E., Torres-Filho, R. A., Xavier, M. S., Bacellar, D. T. L., and Almosny, N. R. P.
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THROMBOCYTOPENIA ,PLATELET count ,HEMOSTASIS ,MEAN platelet volume ,LABORATORY dogs - Abstract
Copyright of Archivos de Medicina Veterinaria is the property of Universidad Austral de Chile, Facultad de Ciencias Veterinarias and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2016
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30. Malignant-functioning neuroendocrine tumors of the pancreas: A survival analysis.
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Keutgen, Xavier M., Nilubol, Naris, and Kebebew, Electron
- Abstract
Background Malignant-functioning pancreatic neuroendocrine tumors (mFpNETs) are rare. Research analyzing the presentation, biological behavior, and patient outcomes of these tumors is limited. Methods We used the Surveillance, Epidemiology, and End Results database to identify patients with malignant insulinomas, gastrinomas, glucagonomas, vasoactive intestinal peptide secreting tumors (VIPomas), somastatinomas, and mixed islet cell tumors (MICTs). The primary endpoint of this study was to identify factors affecting survival. Results We identified 401 patients with mFpNETs. Between histologic subtypes, there were significant differences in sex and age, and in tumor size, grade, location, and stage. Median survival time for insulinomas was 12.7 years; gastrinomas, 10.2 years; glucagonomas, 7.7 years; VIPomas, 7.9 years; and MICTs, 3.4 years. Multivariable analysis showed that histology (insulinoma, gastrinoma, and VIPoma; P = .009), absence of distant metastases ( P = .002), age < 50 years ( P = .001), surgical intervention ( P = .001), and stage I/II disease ( P = .011) were independently associated with prolonged survival. Subgroup analysis demonstrated that removal of the primary tumor in stage IV mFpNETs was associated with significantly prolonged survival ( P = .01). Conclusion mFpNETs are rare tumors that commonly present at an advanced stage despite hormonal secretion. Primary tumor resection is associated with longer survival in stages I–III as well as stage IV tumors. [ABSTRACT FROM AUTHOR]
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- 2016
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31. Resection of primary tumor site is associated with prolonged survival in metastatic nonfunctioning pancreatic neuroendocrine tumors.
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Keutgen, Xavier M., Nilubol, Naris, Glanville, Joanne, Sadowski, Samira M., Liewehr, David J., Venzon, David J., Steinberg, Seth M., and Kebebew, Electron
- Abstract
Background Nonfunctioning pancreatic neuroendocrine tumors (NFpNET) present with distant metastases in up to 50% of patients. It is unknown whether removal of the primary tumor in patients with NFpNET and metastases is beneficial. Methods We used the Surveillance, Epidemiology, and End Results database to identify patients with NFpNET and distant metastases. The primary outcome measure in this study was overall survival. Results We identified 882 patients with metastatic NFpNET who had survival data; 303 (34%) patients had operative removal of their primary tumor of which 243 (80%) were grade I or II. Median survival of patients undergoing resection of the primary site was 65 (95% confidence interval 60–86) versus 10 (8–12) months for those without resection ( P < .0001). Patients diagnosed after 2003 ( n = 625, 71%) were more likely to undergo an operation than those diagnosed earlier ( P = .001). Multivariable analysis showed that a lesser tumor grade ( P < .0001), younger age ( P < .0001), diagnosis during or after 2003 ( P = .0003), tumor site in the body/tail ( P = .009), and operative resection of the primary tumor site ( P < .0001) were associated with prolonged survival of patients with NFpNET and distant metastases. Conclusion This study suggests that resection of the site of the primary NFpNET is associated with greater survival in patients with distant metastases and could therefore be considered as a additional treatment option in this patient population. [ABSTRACT FROM AUTHOR]
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- 2016
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32. Wolbachia spp. interfere na detecção molecular de Ehrlichia canis e Anaplasma platys em cães com microfilaremia.
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Xavier, M. S., Fonseca, C. N., Ferreira, R. F., Castro, T. X., Neves, F. P. G., Barbosa, A. V., Cerqueira, A. M. F., and Almosny, N. R. P.
- Abstract
This report aimed to study the interference in molecular testing for Ehrlichia canis and Anaplasma platys in blood of 155 dogs from the coastal region of Rio de Janeiro. Five Anaplasmataceae positive samples but negative for E. canis and A. platys, from microfilaremic animals, were chosen for sequencing. These sequences, when compared to Gen et Bank database, showed 88% to 100% similarity with Wolbachia spp. denoting an interference in the detection of DNA from other members of Anaplasmataceae, possibly due to a high concentration of Wolbachia spp. DNA. [ABSTRACT FROM AUTHOR]
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- 2015
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33. Blood parameters and measurements of weight in the rehabilitation of Magellanic penguins (Spheniscus magellanicus, Foster 1781).
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Martins, A. M., Silva Filho, R. P., Xavier, M. O., Meireles, M. C. A., and Robaldo, R. B.
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PENGUINS ,SURVIVAL analysis (Biometry) ,VETERINARY medicine - Abstract
The article discusses research which examined the relationship between the survival of Magellanic penguins during rehabilitation and the values of hematocrit, total plasma protein and body weight of the birds received at the Recovery Centre for Sea Animals.
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- 2015
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34. Indirect ELISA for diagnosis of Brucella ovis infection in rams.
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França, S. A., Mol, J. P. S., Costa, E. A., Silva, A. P. C., Xavier, M. N., Tsolis, R. M., Reism, J. K. P., Paixão, T. A., and Santos, R. L.
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ENZYME-linked immunosorbent assay ,RAMS ,BRUCELLA ,ANTIGENS ,RECOMBINANT proteins ,PLASMIDS ,ESCHERICHIA coli ,ELECTROPORATION ,DISEASES ,BACTERIA - Abstract
The article discusses research that aims to form an indirect enzyme-linked immuno assay, or iELISA, using recombinant proteins rBoP59 and rBP26 as antigens for serological diagnosis of Brucella ovis infection. Study highlights include transformation of expression plasmids into electrocomponent Escherichia coli BL21 by electroporation, standardization of iELISA with rBoP59 or rBP26, and repeatability assessment of the rBP26 iELISA.
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- 2014
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35. Dicer expression and microRNA dysregulation associate with aggressive features in thyroid cancer.
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Erler, Piril, Keutgen, Xavier M., Crowley, Michael J., Zetoune, Tarek, Kundel, Anna, Kleiman, David, Beninato, Toni, Scognamiglio, Theresa, Elemento, Olivier, Zarnegar, Rasa, and IIIFahey, Thomas J.
- Abstract
Background Altered miRNA expression and down-regulation of Dicer has been shown in various cancers. We investigated Dicer expression and global miRNA environment in correlation with malignant features of thyroid tumors. Methods Dicer gene expression was assessed for 22 normal thyroids, 16 follicular adenomas, 28 papillary thyroid cancers (PTCs), 10 tall-cell variants of PTC, 11 follicular variants of PTC, as well as the four thyroid cell lines BCPAP, TPC1, KTC1, and TAD2 via quantitative polymerase chain reaction. BRAF (V600E) mutation screening was completed for 31 neoplasms. Next-generation sequencing was performed on a subset of PTC and normal thyroid. Protein levels were assessed via Western blotting and immunohistochemistry. Results Dicer mRNA was down-regulated in malignant thyroid samples and cell lines compared with normal tissues, benign neoplasms, and the fetal cell line TAD2. Decreased Dicer gene expression in malignant tissues was correlated greatly with aggressive features: extrathyroidal extension, angiolymphatic invasion, multifocality, lymph node and distant metastasis, recurrence, and BRAF (V600E) mutation. Conversely, increased levels of Dicer protein were observed in malignant tissues and cell lines. Sequencing yielded 19 differentially expressed miRNAs. Eight samples had a nonsignificant a global down-regulation in malignant tissues. Conclusion Dysregulation of Dicer and possibly altered expression of miRNAs are associated with aggressive features in thyroid cancers. These findings suggest that disruption in normal miRNA processing involving Dicer may play a role in thyroid cancer progression. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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36. Installation of Rigid Pipeline on Extremely Challenging Seabed.
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Xavier, M., Hjelmstad, O. P., Solano, R. F., and Hansen, A. S.
- Abstract
This article presents a paper about the challenges in installing rigid subsea pipelines in the oil & gas offshore fields in Brazil. The subsea pipelines allow the flow of gas/oil from the deep water areas up to facilities near the shore, giving interface between live productions fields and auxiliary units. It discusses the main engineering challenges during the planning phase and the analyses that were performed to evaluate and guarantee pipeline stability during installation/operation.
- Published
- 2009
37. Evaluation and management of pancreatic lesions in patients with von Hippel–Lindau disease
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Keutgen, Xavier M., Hammel, Pascal, Choyke, Peter L., Libutti, Steven K., Jonasch, Eric, and Kebebew, Electron
- Abstract
Pancreatic lesions occur in two-thirds of patients with von Hippel–Lindau (VHL) diseaseCystic pancreatic lesions or serous cystadenomas, which occur in almost 50% of all patients with VHL disease, are not malignant and rarely require interventionPancreatic neuroendocrine tumours (pNETs) associated with VHL disease have a variable natural history, which necessitates lifelong follow-up monitoring using imaging, but are less aggressive than sporadic pNETsSurgical removal of VHL-associated pNETs with diameters ≥3 cm and ≥2 cm in the pancreatic body and head, respectively, or that are growing rapidly (doubling time <500 days) should be consideredAdditional criteria for consideration of surgical removal of VHL-associated pNETs include obvious signs of malignancy, such as locoregional invasion and/or regional or distant metastasesA multidisciplinary-team approach is of paramount importance in the management of patients with VHL-disease-associated pancreatic lesions.
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- 2016
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38. Management of pancreatic neuroendocrine tumors
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Keutgen, Xavier M, Babic, Bruna, and Nilubol, Naris
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Pancreatic neuroendocrine tumors (pNETs) are rare tumors that have a better prognosis than their exocrine counterpart, but frequently present with advanced disease. Management of pNETs has evolved considerably over the past decade. Surgical resection remains the only potentially curative option for patients with pNETs. Patients who have locoregionally advanced and/or metastatic pNETs require additional treatments. These include liver-directed (transarterial (chemo)-embolization, selective intraarterial radio therapy) and systemic therapies (somatostatin analogs, targeted therapy such as tyrosine-kinase inhibitors and mammalian target of rapamycin inhibitor, peptide receptor radionuclide therapy and cytotoxic chemotherapy). The aim of this article is to review the current treatment options as well as potential future therapeutic perspectives for patients with pNETs.
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- 2016
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39. Management of Pancreatic Neuroendocrine Tumors
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Keutgen, Xavier M, Babic, Bruna, and Nilubol, Naris
- Abstract
AbstractPancreatic neuroendocrine tumors (pNETs) are rare tumors that have a better prognosis than their exocrine counterpart, but frequently present with advanced disease. Management of pNETs has evolved considerably over the past decade. Surgical resection remains the only potentially curative option for patients with pNETs. Patients who have locoregionally advanced and/or metastatic pNETs require additional treatments. These include liver-directed (transarterial (chemo)-embolization, selective intraarterial radio therapy) and systemic therapies (somatostatin analogs, targeted therapy such as tyrosine-kinase inhibitors and mammalian target of rapamycin inhibitor, peptide receptor radionuclide therapy and cytotoxic chemotherapy). The aim of this article is to review the current treatment options as well as potential future therapeutic perspectives for patients with pNETs.
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- 2016
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40. Early rheumatoid arthritis treated with tocilizumab, methotrexate, or their combination (U-Act-Early): a multicentre, randomised, double-blind, double-dummy, strategy trial
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Bijlsma, Johannes W J, Welsing, Paco M J, Woodworth, Thasia G, Middelink, Leonie M, Pethö-Schramm, Attila, Bernasconi, Corrado, Borm, Michelle E A, Wortel, Cornelis H, ter Borg, Evert Jan, Jahangier, Z Nazira, van der Laan, Willemijn H, Bruyn, George A W, Baudoin, Paul, Wijngaarden, Siska, Vos, Petra A J M, Bos, Reinhard, Starmans, Mirian J F, Griep, Eduard N, Griep-Wentink, Joanna R M, Allaart, Cornelia F, Heurkens, Anton H M, Teitsma, Xavier M, Tekstra, Janneke, Marijnissen, Anne Carien A, Lafeber, Floris P J, and Jacobs, Johannes W G
- Abstract
For patients with newly diagnosed rheumatoid arthritis, treatment aim is early, rapid, and sustained remission. We compared the efficacy and safety of strategies initiating the interleukin-6 receptor-blocking monoclonal antibody tocilizumab with or without methotrexate (a conventional synthetic disease-modifying antirheumatic drug [DMARD]), versus initiation of methotrexate monotherapy in line with international guidelines.
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- 2016
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41. Limitations Using the Vacuum-Assist Venous Drainage Technique During Cardiopulmonary Bypass Procedures
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Jegger, David, Tevaearai, Hendrik T., Mueller, Xavier M., Horisberger, Judith, von Segesser, Ludwig K., Jegger, David, Tevaearai, Hendrik T., Mueller, Xavier M., Horisberger, Judith, and von Segesser, Ludwig K.
- Abstract
Vacuum-assist venous drainage (VAVD) can increase venous blood return during cardiopulmonary bypass (CPB) procedures. However, the negative pressure created in the closed cardiotomy reservoir can be transmitted to the oxygenator if a nonocclusive or centrifugal arterial pump is used, resulting in bubble transgression (BT) from the gas to blood compartment of the oxygenator. We analyzed the vacuum pressure required to produce BT using an in vitrocircuit including successively a closed reservoir, a pump (centrifugal or roller), and an oxygenator. A constant hydrostatic pressure was maintained onto the oxygenator. Vacuum was applied on the cardiotomy reservoir, progressively increasing negative pressure from 0 to −80 mmHg and monitoring BT with a bubble detector. Six different oxygenators were compared. A partially occlusive roller pump and a centrifugal pump were compared to a control, which was without any pump. A mean negative pressure of −53 ± 7 mmHg was necessary to produce BT in all the oxygenators in the absence of a pump. The presence of a centrifugal pump between the reservoir and the oxygenator significantly increased the negative pressure required to produce BT compared to the control (−67 ± 7 mmHg, p< .05). No bubbles were detected using the roller pump (>−80 mmHg needed for BT), thus statistically significant when compared to the centrifugal pump (p< .05). The centrifugal pump offers significant resistance to BT but not as much compared to the roller pump, though BT cannot be prevented if the pump is turned off while the vacuum remains on the reservoir. Therefore, VAVD is a safe technique as long as the perfusionist stops the vacuum when the arterial pump is no longer in use.
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- 2003
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42. Impact of Hollow-Fiber Membrane Surface Area on Oxygenator Performance: Dideco D903 Avant Versus a Prototype with Larger Surface Area
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Mueller, Xavier M., Tevaearai, Hendrick T., Jegger, David, Boone, Yves, Augstburger, Monique, von Segesser, Ludwig K., Mueller, Xavier M., Tevaearai, Hendrick T., Jegger, David, Boone, Yves, Augstburger, Monique, and von Segesser, Ludwig K.
- Abstract
This study compares the gas transfer capacity, the blood trauma, and the blood path resistance of the hollow-fiber membrane oxygenator Dideco D 903 with a surface area of 1.7 m2(oxygenator 1.7) versus a prototype built on the same principles but with a surface area of 2 m2(oxygenator 2).
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- 2000
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43. Fungi in the respiratory tract of horses with recurrent airway obstruction.
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Xavier, M. O., Nogueira, C. E. W., Meirelles, M., Fernandes, W. R., Andreolla, H., Severo, L. C., Pasqualotto, A. C., and Meireles, M. C. A.
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- 2014
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44. Impact of Patient Sex on Clinical Outcomes.
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Teitsma, Xavier M., van der Hoeven, Henk, Tamminga, Rob, and de Bie, Rob A.
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- 2014
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45. In vivo genome editing of the albumin locus as a platform for protein replacement therapy
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Sharma, Rajiv, Anguela, Xavier M., Doyon, Yannick, Wechsler, Thomas, DeKelver, Russell C., Sproul, Scott, Paschon, David E., Miller, Jeffrey C., Davidson, Robert J., Shivak, David, Zhou, Shangzhen, Rieders, Julianne, Gregory, Philip D., Holmes, Michael C., Rebar, Edward J., and High, Katherine A.
- Abstract
Site-specific genome editing provides a promising approach for achieving long-term, stable therapeutic gene expression. Genome editing has been successfully applied in a variety of preclinical models, generally focused on targeting the diseased locus itself; however, limited targeting efficiency or insufficient expression from the endogenous promoter may impede the translation of these approaches, particularly if the desired editing event does not confer a selective growth advantage. Here we report a general strategy for liver-directed protein replacement therapies that addresses these issues: zinc finger nuclease (ZFN) –mediated site-specific integration of therapeutic transgenes within the albumin gene. By using adeno-associated viral (AAV) vector delivery in vivo, we achieved long-term expression of human factors VIII and IX (hFVIII and hFIX) in mouse models of hemophilia A and B at therapeutic levels. By using the same targeting reagents in wild-type mice, lysosomal enzymes were expressed that are deficient in Fabry and Gaucher diseases and in Hurler and Hunter syndromes. The establishment of a universal nuclease-based platform for secreted protein production would represent a critical advance in the development of safe, permanent, and functional cures for diverse genetic and nongenetic diseases.
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- 2015
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46. In vivo genome editing of the albumin locus as a platform for protein replacement therapy
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Sharma, Rajiv, Anguela, Xavier M., Doyon, Yannick, Wechsler, Thomas, DeKelver, Russell C., Sproul, Scott, Paschon, David E., Miller, Jeffrey C., Davidson, Robert J., Shivak, David, Zhou, Shangzhen, Rieders, Julianne, Gregory, Philip D., Holmes, Michael C., Rebar, Edward J., and High, Katherine A.
- Abstract
Site-specific genome editing provides a promising approach for achieving long-term, stable therapeutic gene expression. Genome editing has been successfully applied in a variety of preclinical models, generally focused on targeting the diseased locus itself; however, limited targeting efficiency or insufficient expression from the endogenous promoter may impede the translation of these approaches, particularly if the desired editing event does not confer a selective growth advantage. Here we report a general strategy for liver-directed protein replacement therapies that addresses these issues: zinc finger nuclease (ZFN) –mediated site-specific integration of therapeutic transgenes within the albumin gene. By using adeno-associated viral (AAV) vector delivery in vivo, we achieved long-term expression of human factors VIII and IX (hFVIII and hFIX) in mouse models of hemophilia A and B at therapeutic levels. By using the same targeting reagents in wild-type mice, lysosomal enzymes were expressed that are deficient in Fabry and Gaucher diseases and in Hurler and Hunter syndromes. The establishment of a universal nuclease-based platform for secreted protein production would represent a critical advance in the development of safe, permanent, and functional cures for diverse genetic and nongenetic diseases.
- Published
- 2015
- Full Text
- View/download PDF
47. Value Added Contributions of Science Parks—the Case of the Barcelona Scientific Park
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Triadó-Ivern, Xavier M., Aparicio-Chueca, Pilar, and Jaría-Chacón, Natalia
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- 2015
- Full Text
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48. Anxious and non-anxious major depressive disorder in the World Health Organization World Mental Health Surveys
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Kessler, R. C., Sampson, N. A., Berglund, P., Gruber, M. J., Al-Hamzawi, A., Andrade, L., Bunting, B., Demyttenaere, K., Florescu, S., de Girolamo, G., Gureje, O., He, Y., Hu, C., Huang, Y., Karam, E., Kovess-Masfety, V., Lee, S, Levinson, D., Medina Mora, M. E., Moskalewicz, J., Nakamura, Y., Navarro-Mateu, F., Browne, M. A. Oakley, Piazza, M., Posada-Villa, J., Slade, T., ten Have, M., Torres, Y., Vilagut, G., Xavier, M., Zarkov, Z., Shahly, V., and Wilcox, M. A.
- Abstract
Background.To examine cross-national patterns and correlates of lifetime and 12-month comorbid DSM-IV anxiety disorders among people with lifetime and 12-month DSM-IV major depressive disorder (MDD).Method.Nationally or regionally representative epidemiological interviews were administered to 74 045 adults in 27 surveys across 24 countries in the WHO World Mental Health (WMH) Surveys. DSM-IV MDD, a wide range of comorbid DSM-IV anxiety disorders, and a number of correlates were assessed with the WHO Composite International Diagnostic Interview (CIDI).Results.45.7% of respondents with lifetime MDD (32.0–46.5% inter-quartile range (IQR) across surveys) had one of more lifetime anxiety disorders. A slightly higher proportion of respondents with 12-month MDD had lifetime anxiety disorders (51.7%, 37.8–54.0% IQR) and only slightly lower proportions of respondents with 12-month MDD had 12-month anxiety disorders (41.6%, 29.9–47.2% IQR). Two-thirds (68%) of respondents with lifetime comorbid anxiety disorders and MDD reported an earlier age-of-onset (AOO) of their first anxiety disorder than their MDD, while 13.5% reported an earlier AOO of MDD and the remaining 18.5% reported the same AOO of both disorders. Women and previously married people had consistently elevated rates of lifetime and 12-month MDD as well as comorbid anxiety disorders. Consistently higher proportions of respondents with 12-month anxious than non-anxious MDD reported severe role impairment (64.4 v.46.0%; χ21= 187.0, p< 0.001) and suicide ideation (19.5 v.8.9%; χ21= 71.6, p< 0.001). Significantly more respondents with 12-month anxious than non-anxious MDD received treatment for their depression in the 12 months before interview, but this difference was more pronounced in high-income countries (68.8 v.45.4%; χ21= 108.8, p< 0.001) than low/middle-income countries (30.3 v.20.6%; χ21= 11.7, p< 0.001).Conclusions.Patterns and correlates of comorbid DSM-IV anxiety disorders among people with DSM-IV MDD are similar across WMH countries. The narrow IQR of the proportion of respondents with temporally prior AOO of anxiety disorders than comorbid MDD (69.6–74.7%) is especially noteworthy. However, the fact that these proportions are not higher among respondents with 12-month than lifetime comorbidity means that temporal priority between lifetime anxiety disorders and MDD is not related to MDD persistence among people with anxious MDD. This, in turn, raises complex questions about the relative importance of temporally primary anxiety disorders as risk markers v.causal risk factors for subsequent MDD onset and persistence, including the possibility that anxiety disorders might primarily be risk markers for MDD onset and causal risk factors for MDD persistence.
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- 2015
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49. Species-specific nested PCR as a diagnostic tool for Brucella ovis infection in rams.
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Costa, L. F., Nozaki, C. N., Lira, N. S. C., Antunes, J. M. A. P., Xavier, M. N., Costa, E. A., Paixão, T. A., Santos, R. L., and Megid, J.
- Subjects
POLYMERASE chain reaction ,INFECTION ,RAMS ,SEMEN ,BRUCELLOSIS ,SHEEP - Abstract
The article discusses research on the use of species-specific nested polymerase chain reaction (PCR) diagnostic tool in detecting Brucella ovis infection in semen and urine of rams. In addition to being contagious, it mentions how ovine brucellosis tend to lead to reproductive failure in infected rams. Brief details on the sample collection and experimentation process performed, frequencies of Brucella ovis positivity detected, and increased sensitivity of nested PCR observed are given.
- Published
- 2013
- Full Text
- View/download PDF
50. Study of bacteria isolated from the foot pad of Spheniscus magellanicus with and without bumblefoot.
- Author
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Osório, L. G., Xavier, M. O., Ladeira, S. R. L., Filho, R. P. Silva, Faria, R. O., Vargas, G. D'Á., Cabana, A. L., Mello, J. R. B., and Meireles, M. C. A.
- Subjects
BACTERIA ,PENGUINS ,FOOT ,BACTERIAL growth ,INFECTION - Abstract
The article discusses research which isolated and identified bacteria present in the foot pad of Magellanic penguins that are either free of or infected with pododermatitis. It reports random selection of penguins studied, clinical evaluation of subjects, and classification performed based on grade of their foot pad injuries. Study results showed that 85 percent of penguins investigated demonstrated bacterial growth even with the absence of injuries, citing their susceptibility to infection.
- Published
- 2013
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