131 results on '"Xavier, M."'
Search Results
2. Medullary Thyroid Cancer: Single Institute Experience Over 3 Decades and Risk Factors for Recurrence
- Author
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Abou Azar, Sara, Tobias, Joseph, Applewhite, Megan, Angelos, Peter, and Keutgen, Xavier M
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- 2024
- Full Text
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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. Who can have a Catholic funeral?
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Montecel, Xavier M.
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RITES & ceremonies , *INTERMENT , *HOME improvement centers , *CATHOLICS , *LITURGICS - Abstract
The article discusses the controversy surrounding the funeral of Cecilia Gentili, a transgender activist and atheist. It explains that there is no one specific Catholic funeral ritual, but rather a set of liturgical rites that can be customized based on local customs. While a Catholic funeral traditionally refers to the identity of the deceased as a Christian, in practice, funeral rites can be permitted for any Catholic, catechumen, or child intended for baptism. Non-Catholic Christians may also have funeral rites if approved by the bishop and not contrary to the wishes of the deceased. The article emphasizes that denying funeral rites is not a punishment or judgment, but rather a pastoral decision to prevent confusion among the living. [Extracted from the article]
- Published
- 2024
5. Nonviral-mediated hepatic expression of IGF-I increases Treg levels and suppresses autoimmune diabetes in mice
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Anguela, Xavier M., Tafuro, Sabrina, Roca, Carles, Callejas, David, Agudo, Judith, Obach, Merce, Ribera, Albert, Ruzo, Albert, Mann, Christopher J., Casellas, Alba, and Bosch, Fatima
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Gene expression -- Research ,Diabetes -- Physiological aspects -- Genetic aspects -- Prevention ,Insulin -- Physiological aspects -- Genetic aspects -- Health aspects ,Autoimmune diseases -- Physiological aspects -- Genetic aspects -- Prevention ,Growth factors -- Physiological aspects -- Health aspects ,Health - Abstract
In type 1 diabetes, loss of tolerance to β-cell antigens results in T-cell--dependent autoimmune destruction of β cells. The abrogation of autoreactive T-cell responses is a prerequisite to achieve long-lasting correction of the disease. The liver has unique immunomodulatory properties and hepatic gene transfer results in tolerance induction and suppression of autoimmune diseases, in part by regulatory T-cell (Treg) activation. Hence, the liver could be manipulated to treat or prevent diabetes onset through expression of key genes. IGF-I may be an immunomodulatory candidate because it prevents autoimmune diabetes when expressed in β cells or subcutaneously injected. Here, we demonstrate that transient, plasmid-derived IGF-I expression in mouse liver suppressed autoimmune diabetes progression. Suppression was associated with decreased islet inflammation and β-cell apoptosis, increased β-cell replication, and normalized β-cell mass. Permanent protection depended on exogenous IGF-I expression in liver nonparenchymal cells and was associated with increased percentage of intrapancreatic Tregs. Importantly, Treg depletion completely abolished IGF-I-mediated protection confirming the therapeutic potential of these cells in autoimmune diabetes. This study demonstrates that a non-viral gene therapy combining the immunological properties of the liver and IGF-I could be beneficial in the treatment of the disease., In type 1 diabetes, the immune system attacks and destroys β cells. At the clinical onset of type 1 diabetes, 15-40% of β cells are still able to produce insulin, [...]
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- 2013
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6. Reversal of type 1 diabetes by engineering a glucose sensor in skeletal muscle
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Mas, Alex, Montane, Joel, Anguela, Xavier M., Munoz, Sergio, Douar, Anne M., Riu, Efren, Otaegui, Pedro, and Bosch, Fatima
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Type 1 diabetes -- Genetic aspects -- Research ,Pancreatic beta cells -- Research ,Health ,Genetic aspects ,Research - Abstract
Type 1 diabetic patients develop severe secondary complications because insulin treatment does not guarantee normoglycemia. Thus, efficient regulation of glucose homeostasis is a major challenge in diabetes therapy. Skeletal muscle is the most important tissue for glucose disposal after a meal. However, the lack of insulin during diabetes impairs glucose uptake. To increase glucose removal from blood, skeletal muscle of transgenic mice was engineered both to produce basal levels of insulin and to express the liver enzyme glucokinase. After streptozotozin (STZ) administration of double-transgenic mice, a synergic action in skeletal muscle between the insulin produced and the increased glucose phosphorylation by glucokinase was established, preventing hyperglycemia and metabolic alterations. These findings suggested that insulin and glucokinase might be expressed in skeletal muscle, using adeno-associated viral 1 (AAV1) vectors as a new gene therapy approach for diabetes. AAV1-Ins+GK-treated diabetic mice restored and maintained normoglycemia in fed and fasted conditions for >4 months after STZ administration. Furthermore, these mice showed normalization of metabolic parameters, glucose tolerance, and food and fluid intake. Therefore, the joint action of basal insulin production and glucokinase activity may generate a 'glucose sensor' in skeletal muscle that allows proper regulation of glycemia in diabetic animals and thus prevents secondary complications. Diabetes 55:1546-1553, 2006, Type 1 diabetes results from the autoimmune destruction of insulin-producing β-cells in pancreatic islets. Patients develop hyperglycemia and need insulin replacement therapy to survive (1). However, this therapy is imperfect [...]
- Published
- 2006
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. 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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9. 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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10. 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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11. 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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12. 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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13. Surgical Management of Pancreatic Neuroendocrine Tumors
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Vaghaiwalla, Tanaz and Keutgen, Xavier M.
- Abstract
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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14. 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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15. 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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16. Hemophilia B and Gene Therapy: A New Chapter with Etranacogene Dezaparvovec
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Anguela, Xavier M. and High, Katherine A.
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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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17. Pain Location, Distribution, and Intensity After Cardiac Surgery(*)
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Mueller, Xavier M., Tinguely, Francine, Tevaearai, Hendrick T., Revelly, Jean-Pierre, Chiolero, Rend, and von Segesser, Ludwig K.
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Chest pain -- Measurement ,Heart -- Surgery ,Surgery -- Measurement ,Health ,Measurement - Abstract
Study objectives: To study the location, distribution, and intensity of pain in a sample of adult cardiac surgery patients during their postoperative hospital stay. Design: In a prospective study, pain [...]
- Published
- 2000
18. OUTLOOK BRIGHT FOR FUELING GROWTH OF NATURAL GAS IN THE SOUTHERN CONE
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Panigrahi, Prabhas PR and Grunauer, Xavier M.
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Natural gas -- Discovery and exploration -- International trade ,Business ,Petroleum, energy and mining industries ,Mercosur -- International trade - Abstract
THE AUTHORS PR Panigrahi is a senior vice-president and oil and gas analyst for Dresdner Kleinwort Benson North America LLC, based in New York, covering 10 oil and gas companies [...]
- Published
- 1999
19. 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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20. 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.
- Published
- 2018
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21. letters.
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KUMAR, MAHESH, BAGARKA, ANIL, LAKRA, ALICE, DAUKIA, DHARMENDRA, SRINIVASAN, K. R., SINGH, VICTORIA, ILANKO, XAVIER M., ANJANEY, GOEL, SHILPA, PANDE, NEHA, and AMAR
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METOO movement ,SEXUAL harassment ,GLOBAL warming - Published
- 2018
22. Letters.
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WOZNIAK, SANDRA, PANETTA, LEON E., GREEN, SUSAN, JONES, MICKEY, MILLER, WANDA, BERGMAN, SYLVIA SUE, MARK, MARY K., KALNOK, RICHARD J., and VELA, XAVIER M.
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LETTERS to the editor ,LOVE ,AUTHORSHIP - Abstract
Several letters to the editor are presented including "Looking to the Man of the Year," by Michael Murphy from Louisville in Ohio, "The Power of Love," by Walter Anthony from San Francisco and "Authorship Denied," by Norman R. Burton from Teheran in Iran.
- Published
- 1971
23. Lord, for tomorrow and its needs
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Xavier, M.
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Hymns -- Appreciation ,Philosophy and religion - Abstract
Originally in eight four-line stanzas, this hymn is dated 1876 and first appeared in the January 1880 issue of The Messenger of the Sacred Heart of Jesus. The text was [...]
- Published
- 2013
24. 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.
- Published
- 2003
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25. 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.
- Published
- 2016
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26. 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.
- Published
- 2016
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27. 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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28. 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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29. 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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30. 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
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31. 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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32. Right ventricular bleeding associated with mediastinitis: a new risk factor
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Mueller, Xavier M., Greentree, David, Dorion, Dominique, Martin, Marcel, Duperval, Raymond, Berard, Dominique, Nguyen, Michel, and Lepage, Serge
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Hemorrhage -- Risk factors ,Heart -- Surgery ,Heart -- Case studies ,Risk factors (Health) ,Health - Abstract
PURPOSE: Mediastinitis-related right ventricular (RV) rupture is a potentially life-threatening complication of cardiac surgery. Our experience with this complication is analyzed. METHODS: All the cases of mediastinitis recorded since the [...]
- Published
- 2005
33. Experimental Evaluation of the Medtronic Maxima Forte Hollow Fiber Membrane Oxygenator
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Mueller, Xavier M., Tevaearai, Hendrick T., Augstburger, Monique, Horisberger, Judith, von Segesser, Ludwig K., Mueller, Xavier M., Tevaearai, Hendrick T., Augstburger, Monique, Horisberger, Judith, and von Segesser, Ludwig K.
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A new hollow fiber membrane oxygenator, the Medtronic Maxima Forté, was tested for gas transfer, blood path resistance and blood handling characteristics in a standardized setting with surviving animals.
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- 1998
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34. Procurement for visceral organ transplantation
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Keutgen, Xavier M. and Petrowsky, Henrik
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Despite significant improvements in visceral organ transplantation over the last few decades, some technical aspects of organ harvesting remain controversial. The purpose of this article is to review and summarize the latest literature on how to perfuse in multiorgan procurement.
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- 2014
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35. A comparative analysis of role attainment and impairment in binge-eating disorder and bulimia nervosa: results from the WHO World Mental Health Surveys
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Kessler, R.C., Shahly, V., Hudson, J.I., Supina, D., Berglund, P.A., Chiu, W.T., Gruber, M., Aguilar-Gaxiola, S., Alonso, J., Andrade, L.H., Benjet, C., Bruffaerts, R., de Girolamo, G., de Graaf, R., Florescu, S.E., Haro, J.M., Murphy, S.D., Posada-Villa, J., Scott, K., and Xavier, M.
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Background.Cross-national population data from the WHO World Mental Health surveys are used to compare role attainments and role impairments associated with binge-eating disorder (BED) and bulimia nervosa (BN).Methods.Community surveys assessed 23 000 adults across 12 countries for BED, BN and ten other DSM-IV mental disorders using the WHO Composite International Diagnostic Interview. Age-of-onset was assessed retrospectively. Ten physical disorders were assessed using standard conditions checklists. Analyses examined reciprocal time-lagged associations of eating disorders (EDs) with education, associations of early-onset (i.e., prior to completing education) EDs with subsequent adult role attainments and cross-sectional associations of current EDs with days of role impairment.Results.BED and BN predicted significantly increased education (females). Student status predicted increased risk of subsequent BED and BN (females). Early-onset BED predicted reduced odds of current (at time of interview) marriage (females) and reduced odds of current employment (males). Early-onset BN predicted increased odds of current work disability (females and males). Current BED and BN were both associated with significantly increased days of role impairment (females and males). Significant BED and BN effects on adult role attainments and impairments were explained by controls for comorbid disorders.Conclusions.Effects of BED on role attainments and impairments are comparable with those of BN. The most plausible interpretation of the fact that these associations are explained by comorbid disorders is that causal effects of EDs are mediated through secondary disorders. Controlled treatment effectiveness studies are needed to trace out long-term effects of BED–BN on secondary disorders.
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- 2014
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36. A machine-learning algorithm for distinguishing malignant from benign indeterminate thyroid nodules using ultrasound radiomic features
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Keutgen, Xavier M., Li, Hui, Memeh, Kelvin, Conn Busch, Julian, Williams, Jelani, Lan, Li, Sarne, David, Finnerty, Brendan, Angelos, Peter, Fahey, Thomas J., and Giger, Maryellen L.
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- 2022
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37. Robust ZFN-mediated genome editing in adult hemophilic mice
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Anguela, Xavier M., Sharma, Rajiv, Doyon, Yannick, Miller, Jeffrey C., Li, Hojun, Haurigot, Virginia, Rohde, Michelle E., Wong, Sunnie Y., Davidson, Robert J., Zhou, Shangzhen, Gregory, Philip D., Holmes, Michael C., and High, Katherine A.
- Abstract
Monogenic diseases, including hemophilia, represent ideal targets for genome-editing approaches aimed at correcting a defective gene. Here we report that systemic adeno-associated virus (AAV) vector delivery of zinc finger nucleases (ZFNs) and corrective donor template to the predominantly quiescent livers of adult mice enables production of high levels of human factor IX in a murine model of hemophilia B. Further, we show that off-target cleavage can be substantially reduced while maintaining robust editing by using obligate heterodimeric ZFNs engineered to minimize unwanted cleavage attributable to homodimerization of the ZFNs. These results broaden the therapeutic potential of AAV/ZFN-mediated genome editing in the liver and could expand this strategy to other nonreplicating cell types.
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- 2013
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38. Prognostic criteria for postoperative mortality in 170 patients undergoing major right hepatectomy
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Filicori, Filippo, Keutgen, Xavier M, Zanello, Matteo, Ercolani, Giorgio, Di Saverio, Salomone, Sacchetti, Federico, Pinna, Antonio Daniele, and Grazi, Gian Luca
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Postoperative hepatic failure is a dreadful complication after major hepatectomy and carries high morbidity and mortality rates. In this study, we assessed the accuracy of the 50/50 criteria (bilirubin 2.9 mg/dL and international normalized ratio 1.7 on postoperative day 5) and the Mullen criteria (bilirubin peak 7 mg/dL on postoperative days 1–7) in predicting death from hepatic failure in patients undergoing right hepatectomy only. In addition, we identified prognostic factors linked to intra-hospital morbidity and mortality in these patients.
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- 2012
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39. Stockbroker reports as basic information source for investment analysis professionals.
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Soy, Cristina and Triadó, Xavier M.
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This article provides an overview of the financial market opinion information. In particular, this paper is devoted to stockbroker reports as documents that reflect the perception of financial markets and one of its key players, analysts, about public companies or industries from the investment point of view. The paper identifies some explanatory keys about the relevance of such information in the context of investment analysis activities developed by corporate finance professionals. It identifies and describes what the main attributes are for analyst reports and derived information products. From this information, it extracts a set of patterns about the characteristics of this type of information and its relation to professional tasks. [ABSTRACT FROM AUTHOR]
- Published
- 2010
40. Grain Yield Increase and Pollen Containment by Plus‐Hybrids Could Improve Acceptance of Transgenic Maize
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Munsch, Magali A., Stamp, Peter, Christov, Nikolai K., Foueillassar, Xavier M., Hüsken, Alexandra, Camp, Karl‐Heinz, and Weider, Christophe
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Maize (Zea maysL.) Plus‐Hybrids are a blend of cytoplasmic male‐sterile (CMS) hybrids and unrelated male‐fertile hybrids ensuring pollination of the whole stand. Combining potential benefits of male sterility (CMS effect) and allo‐pollination (xenia effect), they often outperform the corresponding male‐fertile sib‐pollinated hybrids in terms of yield. The combining abilities of five CMS hybrids and eight pollinators were investigated in a factorial split‐plot design in 12 environments in four countries and two years. The plant material from different breeders represented the three types of male‐sterile cytoplasm. Plus‐Hybrids increased grain yield, on average, by 10% or more and by up to 20% in specific environments. Three highly responsive CMS hybrids and four generally good pollinators were identified. The Plus‐Hybrid effect affected both yield components, CMS leading mainly to a higher number of kernels (KN) and the xenia effect mainly to an increase in the thousand kernel weight (TKW). Despite some differences in the response of the three types of CMS, the effect of the cytoplasm was not significant. While the CMS effect depended strongly on environment, the xenia was consistent in all environments but its extent varied. As well as increasing yield, we can expect that Plus‐Hybrids can make a large contribution to the coexistence of transgenic and conventional maize by biocontainment, that is, eliminating or reducing the release of transgenic pollen in Bacillus thuringiensis(Bt) maize or herbicide‐tolerant (HT) maize.
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- 2010
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41. Profile and performance of the university research groups
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Marimon, Frederic, Aparicio, Pilar, and Triado, Xavier M.
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This paper profiles the 'research groups' at the University of Barcelona in order to identify the key success factors of the best groups. A factor analysis was carried out to determine the groups' defining characteristics, which are stability, size, quality of publications and quantity of scientific output. Then, a cluster analysis was applied to the 169 groups, and three cluster types were identified. One of the clusters stood out by virtue of the impact of its publications and in terms of the general quality of its output. A comparison was carried out between the Excellent cluster and other groups.
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- 2010
42. Light It Up! The Use of DOTATATE in Diagnosis and Treatment of Neuroendocrine Neoplasms
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Schwarz, Jason L., Williams, Jelani K., Keutgen, Xavier M., and Liao, Chih-Yi
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Radiolabeled somatostatin analogs are increasingly used in the diagnosis and treatment of neuroendocrine tumors. Diagnostic imaging with 68Ga-DOTATATE PET/CT has demonstrated the improved sensitivity in detecting primary and metastatic neuroendocrine lesions compared with conventional imaging and prior generation somatostatin receptor imaging. Peptide receptor radionuclide therapy with 177Lu-DOTATATE is now frequently included in the management of neuroendocrine neoplasms, with prospective randomized control studies demonstrating its beneficial impact on survival and quality of life. Nonetheless, peptide rector radionuclide therapy is still considered palliative rather than curative and may be accompanied by adverse effects.
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- 2022
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43. The role of chelators in preventing biofilm formation and catheter-related bloodstream infections
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Raad, Issam I, Fang, Xiang, Keutgen, Xavier M, Jiang, Ying, Sherertz, Robert, and Hachem, Ray
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As metallic cations are essential to microbial adherence, biofilm formation, and bacterial growth, efforts have been directed toward utilizing metal-binding chelators that have the capability of inhibiting bacterial growth by disrupting surface adherence and preventing biofilm production. This review focuses on recent advances in the role of chelators in biofilm disruption and prevention of catheter-related bloodstream infections.
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- 2008
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44. Intradialytic nutritional support
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Cano, Noël JM and Leverve, Xavier M
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Intradialytic nutritional support has been used for more than 30 years both in critically ill patients with acute renal failure and during maintenance hemodialysis. Present knowledge allows better estimation of its metabolic and nutritional efficacy, as well its effect on patient outcome.
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- 2008
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45. Genetic Diversity among Clinical Isolates of Candida glabrataAnalyzed by Randomly Amplified Polymorphic DNA and Multilocus Enzyme Electrophoresis Analyses
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Boldo, Xavier M., Villa-Tanaca, Lourdes, iga, and Herna´ndez-Rodri´guez, Ce´sar
- Abstract
ABSTRACTThe genetic diversity of 47 clinical and reference strains of Candida glabratafrom several geographical origins and diverse clinical disorders, with different antifungal susceptibilities, as well as their genetic relationships were studied through multilocus enzyme electrophoresis (MLEE) and randomly amplified polymorphic DNA (RAPD) techniques. The genetic diversity estimated for 11 MLEE loci measured as average heterozygosity (h) was 0.055. A high level of genetic relatedness among isolates was established by cluster analysis. Forty-nine RAPD markers were analyzed, and the average genetic diversity among isolates, estimated by Shannon's index (Ho), was 0.372. The FSTvalues estimated through an analysis of molecular variance to assess genetic differentiation among isolates revealed no genetic differentiation among them. Our results revealed very low genetic diversity among isolates, a lack of differentiation, and no association with their geographic origin and the clinical characteristics.
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- 2003
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46. Transcriptome characterization of the dimorphic and pathogenic fungus <TOGGLE>Paracoccidioides brasiliensis</TOGGLE> by EST analysis
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Felipe, M. S. S., Andrade, R. V., Petrofeza, S. S., Maranhão, A. Q., Torres, F. A. G., Albuquerque, P., Arraes, F. B. M., Arruda, M., Azevedo, M. O., Baptista, A. J., Bataus, L. A. M., Borges, C. L., Campos, E. G., Cruz, M. R., Daher, B. S., Dantas, A., Ferreira, M. A. S. V., Ghil, G. V., Jesuino, R. S. A., Kyaw, C. M., Leitão, L., Martins, C. R., Moraes, L. M. P., Neves, E. O., Nicola, A. M., Alves, E. S., Parente, J. A., Pereira, M., Poças-Fonseca, M. J., Resende, R., Ribeiro, B. M., Saldanha, R. R., Santos, S. C., Silva-Pereira, I., Silva, M. A. S., Silveira, E., Simões, I. C., Soares, R. B. A., Souza, D. P., De-Souza, M. T., Andrade, E. V., Xavier, M. A. S., Veiga, H. P., Venancio, E. J., Carvalho, M. J. A., Oliveira, A. G., Inoue, M. K., Almeida, N. F., Walter, M. E. M. T., Soares, C. M. A., and Brígido, M. M.
- Abstract
Paracoccidioides brasiliensis is a pathogenic fungus that undergoes a temperature-dependent cell morphology change from mycelium (22° C) to yeast (36° C). It is assumed that this morphological transition correlates with the infection of the human host. Our goal was to identify genes expressed in the mycelium (M) and yeast (Y) forms by EST sequencing in order to generate a partial map of the fungus transcriptome. Individual EST sequences were clustered by the CAP3 program and annotated using Blastx similarity analysis and InterPro Scan. Three different databases, GenBank nr, COG (clusters of orthologous groups) and GO (gene ontology) were used for annotation. A total of 3938 (Y = 1654 and M = 2274) ESTs were sequenced and clustered into 597 contigs and 1563 singlets, making up a total of 2160 genes, which possibly represent one-quarter of the complete gene repertoire in P. brasiliensis. From this total, 1040 were successfully annotated and 894 could be classified in 18 functional COG categories as follows: cellular metabolism (44%); information storage and processing (25%); cellular processescell division, posttranslational modifications, among others (19%); and genes of unknown functions (12%). Computer analysis enabled us to identify some genes potentially involved in the dimorphic transition and drug resistance. Furthermore, computer subtraction analysis revealed several genes possibly expressed in stage-specific forms of P. brasiliensis. Further analysis of these genes may provide new insights into the pathology and differentiation of P. brasiliensis. All EST sequences have been deposited in GenBank under Accession Nos CA580326CA584263. Copyright © 2003 John Wiley & Sons, Ltd.
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- 2003
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47. Transcriptome characterization of the dimorphic and pathogenic fungus Paracoccidioides brasiliensisby EST analysis
- Author
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Felipe, M. S. S., Andrade, R. V., Petrofeza, S. S., Maranhão, A. Q., Torres, F. A. G., Albuquerque, P., Arraes, F. B. M., Arruda, M., Azevedo, M. O., Baptista, A. J., Bataus, L. A. M., Borges, C. L., Campos, E. G., Cruz, M. R., Daher, B. S., Dantas, A., Ferreira, M. A. S. V., Ghil, G. V., Jesuino, R. S. A., Kyaw, C. M., Leitão, L., Martins, C. R., Moraes, L. M. P., Neves, E. O., Nicola, A. M., Alves, E. S., Parente, J. A., Pereira, M., Poças‐Fonseca, M. J., Resende, R., Ribeiro, B. M., Saldanha, R. R., Santos, S. C., Silva‐Pereira, I., Silva, M. A. S., Silveira, E., Simões, I. C., Soares, R. B. A., Souza, D. P., De‐Souza, M. T., Andrade, E. V., Xavier, M. A. S., Veiga, H. P., Venancio, E. J., Carvalho, M. J. A., Oliveira, A. G., Inoue, M. K., Almeida, N. F., Walter, M. E. M. T., Soares, C. M. A., and Brígido, M. M.
- Abstract
Paracoccidioides brasiliensisis a pathogenic fungus that undergoes a temperature‐dependent cell morphology change from mycelium (22° C) to yeast (36° C). It is assumed that this morphological transition correlates with the infection of the human host. Our goal was to identify genes expressed in the mycelium (M) and yeast (Y) forms by EST sequencing in order to generate a partial map of the fungus transcriptome. Individual EST sequences were clustered by the CAP3 program and annotated using Blastx similarity analysis and InterPro Scan. Three different databases, GenBank nr, COG (clusters of orthologous groups) and GO (gene ontology) were used for annotation. A total of 3938 (Y = 1654 and M = 2274) ESTs were sequenced and clustered into 597 contigs and 1563 singlets, making up a total of 2160 genes, which possibly represent one‐quarter of the complete gene repertoire in P. brasiliensis. From this total, 1040 were successfully annotated and 894 could be classified in 18 functional COG categories as follows: cellular metabolism (44%); information storage and processing (25%); cellular processes—cell division, posttranslational modifications, among others (19%); and genes of unknown functions (12%). Computer analysis enabled us to identify some genes potentially involved in the dimorphic transition and drug resistance. Furthermore, computer subtraction analysis revealed several genes possibly expressed in stage‐specific forms of P. brasiliensis. Further analysis of these genes may provide new insights into the pathology and differentiation of P. brasiliensis. All EST sequences have been deposited in GenBank under Accession Nos CA580326–CA584263. Copyright © 2003 John Wiley & Sons, Ltd.
- Published
- 2003
- Full Text
- View/download PDF
48. Identification of Candidaspp. by Randomly Amplified Polymorphic DNA Analysis and Differentiation between Candida albicansand Candida dubliniensisby Direct PCR Methods
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oz, Boldo, Xavier M., Villa-Tanaca, Lourdes, and Herna´ndez-Rodri´guez, Ce´sar
- Abstract
ABSTRACTBecause Candidaspecies have innately highly variable antifungal susceptibilities, the availability of a fast and reliable species identification test is very important so that suitable and effective therapeutic measures may be taken. Using three oligonucleotide primers, we established a randomly amplified polymorphic DNA (RAPD) analysis method that enabled direct identification of the most common opportunistic pathogenic Candidaspecies. RAPD analysis revealed a characteristic molecular fingerprint for each Candidaspecies. Differences between the profiles for Candida albicansand C. dubliniensiswere evident. RAPD analysis is a relatively easy, reproducible, and reliable technique that can be useful in providing genetic fingerprints for the identification of strains. In addition, a collection of different C. albicansstrains was identified by a specific PCR based on multiple secreted aspartic proteinase (SAP) genes and the dipeptidyl aminopeptidase (DAP2) gene. Our findings demonstrate that PCR based upon the SAPand DAP2sequences is a simple, rapid, clear, and direct technique for the identification and differentiation of C. albicansand C. dubliniensis.
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- 2003
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49. Identification of Candida spp. by randomly amplified polymorphic DNA analysis and differentiation between Candida albicans and Candida dubliniensis by direct PCR methods.
- Author
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Bautista-Muñoz, Consuelo, Boldo, Xavier M, Villa-Tanaca, Lourdes, and Hernández-Rodríguez, César
- Abstract
Because Candida species have innately highly variable antifungal susceptibilities, the availability of a fast and reliable species identification test is very important so that suitable and effective therapeutic measures may be taken. Using three oligonucleotide primers, we established a randomly amplified polymorphic DNA (RAPD) analysis method that enabled direct identification of the most common opportunistic pathogenic Candida species. RAPD analysis revealed a characteristic molecular fingerprint for each Candida species. Differences between the profiles for Candida albicans and C. dubliniensis were evident. RAPD analysis is a relatively easy, reproducible, and reliable technique that can be useful in providing genetic fingerprints for the identification of strains. In addition, a collection of different C. albicans strains was identified by a specific PCR based on multiple secreted aspartic proteinase (SAP) genes and the dipeptidyl aminopeptidase (DAP2) gene. Our findings demonstrate that PCR based upon the SAP and DAP2 sequences is a simple, rapid, clear, and direct technique for the identification and differentiation of C. albicans and C. dubliniensis.
- Published
- 2003
50. METABOLIC AND HEMODYNAMIC EFFECTS OF HYPERTONIC SOLUTIONS SODIUM-LACTATE VERSUS SODIUM CHLORIDE INFUSION IN POSTOPERATIVE PATIENTS
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Mustafa, Iqbal and Leverve, Xavier M.
- Abstract
Although hypertonic saline has been proposed as an intravenous resuscitation fluid, the beneficial effects of the sodium load are associated with potentially deleterious effects of chloride. Since the physiological lactate anion is well metabolized, hypertonic lactate solution could represent an interesting alternative. The aim of this study was to compare metabolic and hemodynamic effects of hypertonic infusion of sodium lactate versus sodium chloride in three groups of surgical patients who underwent elective coronary artery bypass grafting (CABG). Hypertonic lactate solution was infused to patients 14 to 16 h after surgery either involving a cardiopulmonary bypass (CPB-Lac, n 20) or on-off pump (OPCAB-Lac, n 20), whereas the third group consisted of patients undergoing cardiopulmonary bypass but receiving hypertonic saline solution (CPB-NaCl, n 20). An equal fluid and sodium load (2.5 mL/2.5 mmol · kg−1) was infused in all patients over 15 min. Plasma glucose and sodium increased after infusion in the three groups, but the changes, although significant, were small. As expected, lactate rose only in CPB-Lac and OPCAB-Lac groups, the changes being more marked in CPB-Lac, indicating a slower lactate metabolism in this group compared with OPCAB-Lac. Although both solutions produced significant increases in cardiac index and oxygen delivery, there was a significant decrease in oxygen extraction only in groups receiving sodium lactate (CPB-Lac and OPCAB-Lac) and not in CPB-NaCl. Finally, hypertonic NaCl infusion induced a modest, although significant, decrease in arterial pH and bicarbonate, whereas hypertonic lactate infusion increased these two parameters in both CPB-Lac and OPCAB-Lac. This study demonstrates that hypertonic lactate infusion is safe and well tolerated in patients undergoing elective cardiac surgery.
- Published
- 2002
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