Research Topics
Species | M T AbreuSummaryAffiliation: Cedars-Sinai Medical Center Country: USA Publications
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Detail Information
Publications
Combination therapy with infliximab and immunomodulators: is the glass half empty?Amar R Deshpande
Gastroenterology 134:2161-3. 2008
Modulation of barrier function during Fas-mediated apoptosis in human intestinal epithelial cellsM T Abreu
Inflammatory Bowel Disease Center, Cedars Sinai Medical Center, Los Angeles, California 90048, USA
Gastroenterology 119:1524-36. 2000..We hypothesized that increased, immune-mediated apoptosis during inflammation might result in barrier dysfunction of the epithelium...
TLR signaling at the intestinal epithelial interfaceMaria T Abreu
Inflammatory Bowel Disease Center, Division of Gastroenterology, Department of Medicine, Cedars Sinai Medical Center, Los Angeles, California 90048, USA
J Endotoxin Res 9:322-30. 2003..The Th1 cytokine IFN-gamma up-regulates expression of MD-2 in a STAT-dependent fashion. The results of our studies have important implications for understanding human inflammatory bowel diseases...
The pathogenesis of inflammatory bowel disease: translational implications for cliniciansMaria T Abreu
Department of Medicine, Division of Gastroenterology, Inflammatory Bowel Disease Center, Cedars Sinai Medical Center, 8631 West 3rd Street, Suite 245E, Los Angeles, CA 90048, USA
Curr Gastroenterol Rep 4:481-9. 2002..The next stage of research will take advantage of such molecular biologic techniques to identify new pathogenetic mechanisms and targets for therapy tailored to individual patients...
Mutations in NOD2 are associated with fibrostenosing disease in patients with Crohn's diseaseMaria T Abreu
Inflammatory Bowel Disease Center, Cedars Sinai Medical Center, Los Angeles, California 90048, USA
Gastroenterology 123:679-88. 2002..NOD2 gene mutations in CD have been described recently and may alter innate immune responses. We hypothesized that NOD2 mutations may be associated with distinct phenotypic expressions of CD...
Controversies in IBD. Serologic tests are helpful in managing inflammatory bowel diseaseMaria T Abreu
Inflammatory Bowel Disease Center, Cedars-Sinai Medical Center, Los Angeles, California, USA
Inflamm Bowel Dis 8:224-6; discussion 223, 230-1. 2002
TLR4 and MD-2 expression is regulated by immune-mediated signals in human intestinal epithelial cellsMaria T Abreu
Inflammatory Bowel Disease Center, Division of Gastroenterology, Department of Medicine, Cedars Sinai Medical Center, Los Angeles, California 90048, USA
J Biol Chem 277:20431-7. 2002..Th1 cytokines may initiate or perpetuate intestinal inflammation by altering toll-like receptor expression and bacterial reactivity...
Measurement of vitamin D levels in inflammatory bowel disease patients reveals a subset of Crohn's disease patients with elevated 1,25-dihydroxyvitamin D and low bone mineral densityM T Abreu
Division of Gastroenterology, Inflammatory Bowel Disease Center, Steven Spielberg Pediatric Research Center, Burns and Allen Research Institute, Los Angeles, CA 90048, USA
Gut 53:1129-36. 2004..We further hypothesised that this was secondary to increased synthesis of 1,25(OH)(2)D by inflammatory cells in the intestine. The aim of this study was to examine the relationship between 1,25(OH)(2)D levels and BMD in patients with CD...
Phosphatidylinositol 3-kinase-dependent pathways oppose Fas-induced apoptosis and limit chloride secretion in human intestinal epithelial cells. Implications for inflammatory diarrheal statesM T Abreu
Inflammatory Bowel Disease Center and Burns and Allen Research Institute, Cedars Sinai Medical Center, 8631 West 3rd Street, Suite 245E, Los Angeles, CA 90048, USA
J Biol Chem 276:47563-74. 2001..These findings suggest that agonists of PI3-kinase such as growth factors may have a dual effect on intestinal inflammation by protecting epithelial cells against immune-mediated apoptosis and limiting chloride secretory diarrhea...
Decreased expression of Toll-like receptor-4 and MD-2 correlates with intestinal epithelial cell protection against dysregulated proinflammatory gene expression in response to bacterial lipopolysaccharideM T Abreu
Inflammatory Bowel Disease Center, Division of Gastroenterology, Department of Medicine, Cedars Sinai Medical Center, 8631 West 3rd Street, Los Angeles, CA 90048, USA
J Immunol 167:1609-16. 2001..We conclude that IEC limit dysregulated LPS signaling by down-regulating expression of MD-2 and TLR4. The remainder of the intracellular LPS signaling pathway is functionally intact...
An open-label pilot study using thioguanine as a therapeutic alternative in Crohn's disease patients resistant to 6-mercaptopurine therapyM C Dubinsky
Department of Medicine, Cedars Sinai Medical Center, UCLA, Los Angeles, California 90048, USA
Inflamm Bowel Dis 7:181-9. 2001..This pilot study evaluated the safety, tolerance, and efficacy of 6-TG in the subgroup of Crohn's disease (CD) patients failing to attain adequate disease control with traditional 6-MP/AZA therapy...
Outcome of cytomegalovirus infections in patients with inflammatory bowel diseaseK A Papadakis
Division of Gastroenterology, Cedars-Sinai Inflammatory Bowel Disease Center, Los Angeles, California 90048, USA
Am J Gastroenterol 96:2137-42. 2001..Expedient evaluation, prompt treatment intervention with ganciclovir, and withdrawal of immunosuppressive treatment may avoid complications and mortality. This regimen leads to improvement of the underlying IBD in most patients...
Role of Toll-like receptors in gastrointestinal malignanciesM Fukata
Inflammatory Bowel Disease Center, Division of Gastroenterology, Department of Medicine, Mount Sinai School of Medicine, New York, NY, USA
Oncogene 27:234-43. 2008..Studying the link between innate immune signaling and gastrointestinal malignancies offers the possibility to identify novel ways to both prevent and treat gastrointestinal cancer...
TLR4 signalling in the intestine in health and diseaseM Fukata
Inflammatory Bowel Disease Center, Mount Sinai School of Medicine, One Gustave L Levy Place, New York, NY 10029, USA
Biochem Soc Trans 35:1473-8. 2007..The pathogenesis of IBD, ulcerative colitis and Crohn's disease may be due to increased TLR or decreased TLR signalling respectively. Finally, we discuss the possible role of TLR signalling in colitis-associated neoplasia...
Antibodies to I2 predict clinical response to fecal diversion in Crohn's diseaseJacob Spivak
Division of Colon and Rectal Surgery, Department of Surgery, Inflammatory Bowel Disease Center, Cedars-Sinai Medical Center, Los Angeles, CA, USA
Inflamm Bowel Dis 12:1122-30. 2006..CONCLUSION: Expression of I2 antibodies against a bacterial antigen of Pseudomonas fluorescens was highly associated with clinical response to fecal diversion in CD patients...
Cox-2 is regulated by Toll-like receptor-4 (TLR4) signaling: Role in proliferation and apoptosis in the intestineMasayuki Fukata
Inflammatory Bowel Disease Center, Division of Gastroenterology, New York, New York, USA
Gastroenterology 131:862-77. 2006..We wished to test the hypothesis that cyclooxygenase 2 (Cox-2)-derived prostaglandin E2 (PGE2) is important in TLR4-related mucosal repair...
Treatment with infliximab is associated with increased markers of bone formation in patients with Crohn's diseaseMaria T Abreu
Department of Medicine, Division of Gastroenterology, Inflammatory Bowel Disease Center, Mount Sinai School of Medicine, New York, NY, USA
J Clin Gastroenterol 40:55-63. 2006..Studies of longer duration are needed to assess the effect of infliximab on bone mineral density...
Nod2 in normal and abnormal intestinal immune functionMaria T Abreu
Mount Sinai School of Medicine, New York, New York 10029, USA
Gastroenterology 129:1302-4. 2005
NOD2 variants and antibody response to microbial antigens in Crohn's disease patients and their unaffected relativesShane M Devlin
Inflammatory Bowel Disease Center, Cedars Sinai Medical Center, Los Angeles, California 90048, USA
Gastroenterology 132:576-86. 2007..The aim of our study was to determine if defects in innate immunity are similarly associated with increased adaptive immune responses to microbial antigens in Crohn's disease patients...
Anti-flagellin (CBir1) phenotypic and genetic Crohn's disease associationsKonstantinos A Papadakis
Cedars Sinai Inflammatory Bowel Disease Center, Los Angeles, California, USA
Inflamm Bowel Dis 13:524-30. 2007..We examined the association between anti-CBir1 and clinical phenotypes and NOD2 variants in a large cohort of adult CD patients...
Translational research in inflammatory bowel diseaseMaria T Abreu
Inflammatory Bowel Disease Center, Mount Sinai School of Medicine, 1 East 100th Street, Box 1069, New York, NY 10029, USA
Mt Sinai J Med 73:1067-73. 2006..This article presents an update on these key developments and emphasizes the translational aspects of research that are directly related to patient care...
Selective leukocyte apheresis for the treatment of inflammatory bowel diseaseMaria T Abreu
Inflammatory Bowel Disease Center, New York, NY, USA
J Clin Gastroenterol 41:874-88. 2007..Despite these findings, large controlled trials of selective leukocyte apheresis in the treatment of IBD are needed to determine the true efficacy of this approach...
Toll-like receptor signaling in small intestinal epithelium promotes B-cell recruitment and IgA production in lamina propriaLimin Shang
Immunology Institute, Mount Sinai School of Medicine, New York, New York, USA
Gastroenterology 135:529-38. 2008..We hypothesized that TLR signaling at the level of the intestinal epithelium is critical for mucosal immune responses...
TLR signaling in the gut in health and diseaseMaria T Abreu
Inflammatory Bowel Disease Center, Division of Gastroenterology, Department of Medicine, Mount Sinai School of Medicine, New York, New York 10029, USA
J Immunol 174:4453-60. 2005..A better understanding of the delicate regulation of TLR and Nod molecules in the gut may lead to improved treatment for enteric infections and idiopathic inflammatory bowel diseases...
Innate immunity and toll-like receptors: clinical implications of basic science researchMaria T Abreu
Inflammatory Bowel Disease Center, Division of Gastroenterology, Department of Medicine, Steven Spielberg Pediatric Research Center, Los Angeles, CA 90048, USA
J Pediatr 144:421-9. 2004..The focus of this article is to describe the role of TLRs in the innate immune response in health and disease...
Early hepatic nodular hyperplasia and submicroscopic fibrosis associated with 6-thioguanine therapy in inflammatory bowel diseaseStephen A Geller
Department of Pathology and Laboratory Medicine, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA
Am J Surg Pathol 28:1204-11. 2004..6-TG-related hepatotoxicity, including liver biochemistry value elevations, sinusoidal collagen deposition on electron microscopy, and veno-occlusive disease, have been described related to its use as therapy for neoplastic disease...
Thioguanine: a potential alternate thiopurine for IBD patients allergic to 6-mercaptopurine or azathioprineMarla C Dubinsky
Department of Medicine, Division of Gastroenterology, Cedars-Sinai Medical Center, UCLA, Los Angeles, California 90048, USA
Am J Gastroenterol 98:1058-63. 2003..Despite these favorable results, candidates for 6-TG should be selected with caution, and its use should be reserved for IBD patients well informed about potential toxicities...
Is genetic testing in IBD ready for prime time?Maria T Abreu
Am J Gastroenterol 99:316-8. 2004
Human intestinal epithelial cells are broadly unresponsive to Toll-like receptor 2-dependent bacterial ligands: implications for host-microbial interactions in the gutGil Melmed
Inflammatory Bowel Disease Center, Division of Gastroenterology, Department of Medicine, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA
J Immunol 170:1406-15. 2003..The relative absence of TLR2 protein expression by IEC and high level of Tollip expression may be important in preventing chronic proinflammatory cytokine secretion in response to commensal Gram-positive bacteria in the gut...
Beta-defensin-2 expression is regulated by TLR signaling in intestinal epithelial cellsPuja Vora
Inflammatory Bowel Disease Center, Division of Gastroenterology, Department of Medicine, Mount Sinai School of Medicine, New York, NY 10029, USA
J Immunol 173:5398-405. 2004..This mechanism may protect the intestinal epithelium from pathogen invasion and from potential invaders among the commensal flora...
New insights into the pathogenesis of inflammatory bowel diseaseGil Y Melmed
Department of Medicine, Division of Gastroenterology, Inflammatory Bowel Disease Center, Mount Sinai School of Medicine, 1190 Fifth Avenue, New York, NY 10029, USA
Curr Gastroenterol Rep 6:474-81. 2004..In this review we summarize these key developments in the pathophysiology of inflammatory bowel disease and attempt to ascribe clinical relevance where applicable...
The myeloid differentiation factor 88 (MyD88) is required for CD4+ T cell effector function in a murine model of inflammatory bowel diseaseMasayuki Fukata
Inflammatory Bowel Disease Center, Division of Gastroenterology, Department of Medicine, Mount Sinai School of Medicine, New York, NY 10029, USA
J Immunol 180:1886-94. 2008..Absence of MyD88 in CD4(+)CD45Rb(high) cells results in defective T cell function, especially Th17 differentiation. These results suggest a role for TLR signaling by T cells in the development of inflammatory bowel disease...
Crohn's disease in patients who fail infliximab therapy: what does the future hold?Maria T Abreu
Inflammatory Bowel Disease Center, Department of Medicine, Mount Sinai School of Medicine, New York, NY, USA
Rev Gastroenterol Disord 7:S20-6. 2007..This article looks at recent studies using these newer TNF inhibitors in patients in whom infliximab treatment has failed as well as in those who have never received infliximab...
6-MP metabolite profiles provide a biochemical explanation for 6-MP resistance in patients with inflammatory bowel diseaseMarla C Dubinsky
Division of Gastroenterology and Genetics, Department of Medicine and Pediatrics, Cedars Sinai Medical Center, UCLA, Los Angeles, California 90048, USA
Gastroenterology 122:904-15. 2002..The objectives of this study were to determine whether dose escalation optimizes both 6-TGN levels and efficacy in patients failing therapy because of subtherapeutic 6-TGN levels and its effect on TPMT...
Hepatotoxicity of 6-mercaptopurine (6-MP) and Azathioprine (AZA) in adult IBD patientsOmid A Shaye
Division of Gastroenterology, Cedars Sinai Medical Center, Los Angeles, California 90048, USA
Am J Gastroenterol 102:2488-94. 2007..The aim of this study was to assess the prevalence of 6-MP/AZA hepatotoxicity and its correlation with serum 6-MMPR levels in adult IBD patients...
Role of vascular endothelial growth factor and angiopoietin systems in serum of Crohn's disease patientsInés D Pousa
Department of Hepato Gastroenterology and Ciberehd University Hospital of La Princesa, Universidad Autonoma de Madrid, Spain
Inflamm Bowel Dis 14:61-7. 2008....
Analysis of soluble angiogenic factors in Crohn's disease: a preliminary studyInés Dueñas Pousa
Department of Gastroenterology and Hepatology, Hospital of La Princesa, Autonomous University of Madrid, Spain
Gastroenterol Hepatol 30:518-24. 2007..Soluble angiogenic factors could be altered in patients with Crohns disease (CD), since inflammation and angiogenesis may play a critical pathogenic role...
Toll-like receptor-4 promotes the development of colitis-associated colorectal tumorsMasayuki Fukata
Inflammatory Bowel Disease Center, Mount Sinai School of Medicine, New York, New York, USA
Gastroenterology 133:1869-81. 2007..The molecular mechanisms linking inflammation and colon carcinogenesis are incompletely understood. We tested the hypothesis that Toll-like receptor 4 (TLR4) is involved in tumorigenesis in the setting of chronic inflammation...
Gut microbes in Crohn's disease: getting to know you better?Seamus J Murphy
Am J Gastroenterol 103:397-8. 2008..This additional marker may complement existing disease markers. Future studies should address whether these antibodies can help categorize patients with indeterminate colitis or predict severity of CD...
Defining subtypes of Crohn's disease patients: the ground work for translational research in inflammatory bowel diseaseMaria T Abreu
J Clin Gastroenterol 36:3-4. 2003
How are Azathioprine and 6-mercaptopurine dosed by gastroenterologists? Results of a survey of clinical practiceJason S Yip
Mount Sinai School of Medicine, New York, NY, USA
Inflamm Bowel Dis 14:514-8. 2008..5 mg/kg/day and 6-MP at 1.5 mg/kg/day. Escalation of dosing is recommended within 2 weeks of initiating therapy. The aim was to determine the prescribing practices of community practice gastroenterologists with respect to 6-MP/AZA dosing...
6-thioguanine can cause serious liver injury in inflammatory bowel disease patientsMarla C Dubinsky
Pediatric Inflammatory Bowel Disease Center, Cedars Sinai Medical Center, 8635 West Third Street, Suite 1165W, Los Angeles, California 90048, USA
Gastroenterology 125:298-303. 2003..The aim of this study was to describe the association between 6-TG and NRH in IBD...
Safety and efficacy of adalimumab (D2E7) in Crohn's disease patients with an attenuated response to infliximabKonstantinos A Papadakis
Division of Gastroenterology, Department of Medicine, Inflammatory Bowel Disease Center, 8631 W. Third Street, Suite 430E, Los Angeles, CA 90048, USA
Am J Gastroenterol 100:75-9. 2005..CONCLUSIONS: Our preliminary data suggest that adalimumab may be a safe and effective therapy for patients with CD who have experienced an attenuated response to infliximab...
Antibodies to tumor necrosis factor-alpha in the treatment of Crohn's diseaseSteven J Brown
The Mount Sinai School of Medicine, Division of Gastroenterology, 1 Gustave L Levy Place, New York, NY 10029, USA
Curr Opin Drug Discov Devel 8:160-8. 2005..We will also address factors that predict response to therapy such as concurrent immunomodulators, high C-reactive protein expression, and polymorphisms in the Fcgamma receptor...
Toll-like receptor-4 is required for intestinal response to epithelial injury and limiting bacterial translocation in a murine model of acute colitisMasayuki Fukata
Inflammatory Bowel Disease Center, Division of Gastroenterology, Department of Medicine, Mount Sinai School of Medicine, 1425 Madison Ave, 11 23D, Box 1069, New York, New York 10029, USA
Am J Physiol Gastrointest Liver Physiol 288:G1055-65. 2005..A defective innate immune response may result in diminished bacterial clearance and ultimately dysregulated response to normal flora...
Defects in mucosal immunity leading to Crohn's diseaseGena M Cobrin
Inflammatory Bowel Disease Center, Division of Gastroenterology, Department of Medicine, Mount Sinai School of Medicine, New York, NY 10029, USA
Immunol Rev 206:277-95. 2005..One may consider a model in which defective innate immune clearance of pathogens or commensal bacteria in CD leads to an inappropriate adaptive immune response to the commensal flora...
Design issues and outcomes in IBD clinical trialsBruce E Sands
Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
Inflamm Bowel Dis 11:S22-8. 2005..Careful subject selection, standardization of disease activity indices, and precise outcome measurement are the keys to continued improvement of the inflammatory bowel disease research process...
Effectiveness of controlled-release budesonide in preserving bone mineral density in patients with Crohn's diseaseMaria T Abreu
Center for Inflammatory Bowel Disease, Mount Sinai School of Medicine, New York, NY 10029, USA
Nat Clin Pract Gastroenterol Hepatol 2:210-1. 2005
The spectrum of gastrointestinal toxicity and effect on disease activity of selective cyclooxygenase-2 inhibitors in patients with inflammatory bowel diseaseRobin Matuk
Department of Medicine, Division of Gastroenterology, Cedars-Sinai Inflammatory Bowel Disease Center, Cedars-Sinai Medical Center, Los Angeles, California 90048, USA
Inflamm Bowel Dis 10:352-6. 2004..Treatment with COX-2 inhibitors is associated with a high incidence of exacerbation of the underlying IBD and GI-related complications...
Ulcerative colitis therapy: importance of delivery mechanismsJeremy Rochester
Inflammatory Bowel Disease Center, Department of Gastroenterology, Mount Sinai School of Medicine, New York, NY, USA
Rev Gastroenterol Disord 5:215-22. 2005..For a given patient, however, it may be necessary to experiment with more than one preparation if an initial trial results in a suboptimal response...
American Gastroenterological Association Institute medical position statement on corticosteroids, immunomodulators, and infliximab in inflammatory bowel diseaseGary R Lichtenstein
Hospital of the University of Pennsylvania University of Pennsylvania School of Medicine Philadelphia, Pennsylvania, USA
Gastroenterology 130:935-9. 2006
American Gastroenterological Association Institute technical review on corticosteroids, immunomodulators, and infliximab in inflammatory bowel diseaseGary R Lichtenstein
Hospital of the University of Pennsylvania University of Pennsylvania School of Medicine Philadelphia, Pennsylvania, USA
Gastroenterology 130:940-87. 2006
Use of capsule endoscopy for established Crohn's diseasePeter Legnani
Department of Medicine, Mount Sinai School of Medicine, One Gustav L Levy Place, Box 1118, New York, NY 10029, USA
Gastrointest Endosc Clin N Am 16:299-306. 2006..At this time, use of capsule endoscopy as a tool for the evaluation of mucosal healing or for prognostication of post-operative recurrence remains investigational...
A pilot study of adalimumab in infliximab-allergic patientsAdrienne Youdim
Department of Medicine, Division of Gastroenterology, Inflammatory Bowel Disease Center, Los Angeles, CA 90048, USA
Inflamm Bowel Dis 10:333-8. 2004..Based on these preliminary data, adalimumab may be a safe and effective substitute for infliximab-allergic patients. Individuals who have been exposed to human antibodies may be sensitized to other human antibodies such as adalimumab...
Advances in the pathogenesis of inflammatory bowel diseaseYuki Young
Inflammatory Bowel Disease Center, Mount Sinai School of Medicine, 1425 Madison Avenue, 11-23, New York, NY 10029, USA
Curr Gastroenterol Rep 8:470-7. 2006..This review focuses on developments likely to culminate in advances in patient care...
Harnessing the power of bacteria to protect the gutMaria T Abreu
N Engl J Med 359:756-9. 2008
