6 results on '"Gedde‐Dahl, Tobias"'
Search Results
2. IL-6 Responsiveness of CD4 + and CD8 + T Cells after Allogeneic Stem Cell Transplantation Differs between Patients and Is Associated with Previous Acute Graft versus Host Disease and Pretransplant Antithymocyte Globulin Therapy.
- Author
-
Tvedt, Tor Henrik Anderson, Rose-John, Stefan, Tsykunova, Galina, Ahmed, Aymen Bushra, Gedde-Dahl, Tobias, Ersvær, Elisabeth, and Bruserud, Øystein
- Subjects
GRAFT versus host disease ,STEM cell transplantation ,T cells ,GLOBULINS ,INTERLEUKIN-6 ,ACUTE diseases - Abstract
Graft-versus-host disease (GVHD), one of the most common and serious complications after allogeneic stem cell transplantation, is mediated by allocative T cells. IL-6 mediates both pro- and anti-inflammatory effects and modulates T cell response through classical signaling and trans-signaling. We investigated the effects on the mTOR and JAK/STAT pathways after various types of IL-6 signaling for circulating T cells were derived from 31 allotransplant recipients 90 days post-transplant. Cells were stimulated with IL-6 alone, hyper-IL-6 (trans-signaling), IL-6+IL-6 receptor (IL-6R; classical + trans-signaling) and IL-6+IL-6R+soluble gp130-Fc (classical signaling), and flow cytometry was used to investigate the effects on phosphorylation of AKT (Thr308), mTOR (Ser2442), STAT3 (Ser727) and STAT3 (Tyr705). CD3
+ CD4+ and CD3+ C8+ T cells responded to classical and trans IL-6 stimulation with increased STAT3 (Tyr705) phosphorylation; these responses were generally stronger for CD3+ CD4+ cells. STAT3 (Tyr705) responses were stronger for patients with previous acute GVHD; CD3+ CD4+ cells from GVHD patients showed an additional STAT3 (Ser727) response, whereas patients without acute GVHD showed additional mTOR (Ser2448) responses. Furthermore, treatment with antithymocyte globulin as a part of GVHD prophylaxis was associated with generally weaker STAT3 (Tyr705) responses and altered STAT3 (Ser727) responsiveness of CD3+ CD4+ cells together with increased mTOR (Ser2448) responses for the CD3+ CD8+ cells. Thus, early post-transplant CD3+ CD4+ and CD3+ CD8+ T cell subsets differ in their IL-6 responsiveness; this responsiveness is modulated by antithymocyte globulin and differs between patients with and without previous acute GVHD. These observations suggest that allotransplant recipients will be heterogeneous with regard to the effects of post-transplant IL-6 targeting. [ABSTRACT FROM AUTHOR]- Published
- 2022
- Full Text
- View/download PDF
3. Centre characteristics and procedure-related factors have an impact on outcomes of allogeneic transplantation for patients with CLL: a retrospective analysis from the European Society for Blood and Marrow Transplantation (EBMT)
- Author
-
Schetelig, Johannes, de Wreede, Liesbeth C., Andersen, Niels S., Moreno, Carol, van Gelder, Michel, Vitek, Antonin, Karas, Michal, Michallet, Mauricette, Machaczka, Maciej, Gramatzki, Martin, Beelen, Dietrich, Finke, Jürgen, Delgado, Julio, Volin, Liisa, Passweg, Jakob, Dreger, Peter, Schaap, Nicolaas, Wagner, Eva, Henseler, Anja, van Biezen, Anja, Bornhäuser, Martin, Iacobelli, Simona, Putter, Hein, Schönland, Stefan O., Kröger, Nicolaus, Esteve, Jordi, Ljungman, Per, de Witte, Theo, Stelljes, Matthias, Sierra, Jorge, Socié, Gerard, Ganser, Arnold, Wulf, Gerhard G., Deconinck, Eric, Faber, Edgar, Feguex, Nathalie, Gedde-Dahl, Tobias, Kolbe, Karin, Chalandon, Yves, Krüger, William, Huynh, Anne, Bourhis, Jean Henri, Schouten, Harry, Ribera Santasusana, Josep M., Interne Geneeskunde, MUMC+: MA Hematologie (9), RS: GROW - R3 - Innovative Cancer Diagnostics & Therapy, and Chalandon, Yves
- Subjects
Oncology ,Male ,Transplantation Conditioning ,Cancer development and immune defence Radboud Institute for Molecular Life Sciences [Radboudumc 2] ,Chronic lymphocytic leukemia ,Medizin ,QUALITY MANAGEMENT-SYSTEM ,Kaplan-Meier Estimate ,risk factor analysis ,GUIDELINES ,Biochemistry ,allogeneic stem cell transplantation ,centre effects ,chronic lymphocytic leukaemia ,frailties ,Transplantation Conditioning / methods ,0302 clinical medicine ,Recurrence ,Risk Factors ,Leukemia, Lymphocytic, Chronic, B-Cell / mortality ,Registries ,Delivery of Health Care / statistics & numerical data ,IBRUTINIB ,ddc:616 ,0303 health sciences ,ALEMTUZUMAB ,Hazard ratio ,Hematopoietic Stem Cell Transplantation ,Professional Practice ,Hematology ,Middle Aged ,3. Good health ,Europe ,030220 oncology & carcinogenesis ,ABT-199 ,Cohort ,SURVIVAL ,Alemtuzumab ,Female ,Europe / epidemiology ,medicine.drug ,Adult ,medicine.medical_specialty ,Allogeneic transplantation ,Immunology ,Lower risk ,DIAGNOSIS ,Settore MED/01 - Statistica Medica ,03 medical and health sciences ,Leukemia, Lymphocytic, Chronic, B-Cell / therapy ,Hematopoietic Stem Cell Transplantation / methods ,Internal medicine ,medicine ,Humans ,Karnofsky Performance Status ,030304 developmental biology ,Aged ,Retrospective Studies ,business.industry ,Proportional hazards model ,CHRONIC LYMPHOCYTIC-LEUKEMIA ,Retrospective cohort study ,STEM-CELL TRANSPLANTATION ,Cell Biology ,medicine.disease ,Leukemia, Lymphocytic, Chronic, B-Cell ,Confidence interval ,Surgery ,Professional Practice / statistics & numerical data ,Transplantation ,business ,Delivery of Health Care ,030215 immunology ,RESPONSES - Abstract
Introduction:Even in the era of novel targeted therapies for the treatment of Chronic Lymphocytic Leukemia (CLL) patients, such as BTK, PI3K and BCL2 inhibitors, allogeneic hematopoietic stem cell transplantations (alloHCT) will remain an important treatment option for a subset of patients with very high risk CLL. The current study focused on the impact of center and procedure-related factors on outcomes after alloHCT, taking into account the impact of patient- and disease-related risk factors. Patients and Methods:Data of 684 CLL patients who received a first alloHCT between 2000 and 2011 were analyzed. Their data were collected as part of the EBMT CLL Data Quality Initiative. Outcomes of interest were Event-Free Survival (EFS) up to 5 years after transplantation and mortality in the first 100 days after alloHCT. Outcomes were analyzed by means of the Kaplan-Meier method and Cox proportional hazards models with a frailty (random effects) component to take into account unexplained center heterogeneity. The following factors describing center characteristics or the transplant procedure were analyzed: experience in alloHCT in general and, for CLL specifically, accreditation by the Joint Accreditation Committee-ISCT & EBMT (JACIE), Gross National Income (GNI)/capita based on purchasing power parity (PPP) (GNI/cap), donor type, donor-patient sex-match, type of conditioning, stem cell source and T-cell depletion (TCD). Results:Five-year EFS of the whole cohort was 37% (95% Confidence Interval, 33%-42%), Day-100 survival was 90% (88%-92%). Experience of the transplant center was measured by the number of all alloHCTs, and alloHCTs for patients with CLL respectively. The median total number of alloHCTs per center per year was 45 (range 0-169) and the median number of CLL alloHCTs was only 2 per center per year (range 0-19). Greater experience with transplantation of patients with CLL (Hazard Ratio (HR) 0.96 per additional transplant, p=0.002), JACIE accreditation (HR 0.7, p=0.045) and a higher GNI/cap (HR 0.4, 95% CI 0.2-0.96, p=0.04) showed a protective impact on 5-year EFS in the Cox model. In vivo TCD with alemtuzumab (HR 1.5 compared to no TCD, p=0.03) and a female donor for a male patient (HR 1.4 compared to a male donor for a male patient, p=0.02) were the only procedure-related factors significantly associated with EFS. Event-Free Survival after in vivo TCD with Anti-Thymocyte-Globulin or after ex vivo TCD was comparable to EFS without TCD (HR 0.9, 0.7-1.3, p=0.6; HR 0.9, 0.5-1.6, p=0.8). Non-myeloablative conditioning did not have a negative impact on 5-year EFS, and exposed patients to a lower risk of non-relapse mortality. Measured and unmeasured center characteristics did not have a significant impact on 100-day mortality. Even when correcting for patient-, procedure- and center-related characteristics, there was still significant variation in center outcome, expressed by center-specific HRs derived from the frailty models, ranging from 0.6 to 1.2. Their impact is illustrated in a model-based plot for EFS (see Figure) which shows outcomes for three reference patients with the same characteristics who would be transplanted in three centers with the same measured characteristics but with the highest, average and lowest HRs in the dataset. These unexplained center effects likely represent a mixture of differences which could apply to the location of the transplant center, unmeasured characteristics of the patient population transplanted at this center, selection criteria which were not reported and factors determining the success of the transplant procedure which might differ between centers. Conclusion: We have confirmed that both center- and procedure-related factors have a significant impact on the EFS of patients with CLL undergoing alloHCT. Our results may help to interpret outcomes of single or multicenter studies better. Since non-myeloablative conditioning did not have a negative impact on EFS and exposed patients to a lower risk of non-relapse mortality, this approach should be favored for future alloHCT for CLL. Probability of Event-Free Survival up to Five Years Post-HCT for three Reference Patients Contribution: J.S. designed the research and wrote the paper. L.C.d.W conducted the statistical analysis and produced the figure. Figure Figure. Disclosures Schetelig: Sanofi: Honoraria. Gramatzki:Janssen: Other: Travel/Accommodation/Expenses, Research Funding. Dreger:Gilead: Consultancy; Gilead: Speakers Bureau; Janssen: Consultancy; Novartis: Speakers Bureau; Novartis: Consultancy; Roche: Consultancy.
- Published
- 2017
4. A prospective non-interventional study on the impact of transfusion burden and related iron toxicity on outcome in myelodysplastic syndromes undergoing allogeneic hematopoietic cell transplantation.
- Author
-
Cremers, Eline M.P., de Witte, Theo, de Wreede, Liesbeth, Eikema, Diderik-Jan, Koster, Linda, van Biezen, Anja, Finke, Jürgen, Socié, Gerard, Beelen, Dietrich, Maertens, Johan, Nagler, Arnon, Kobbe, Guido, Ziagkos, Dimitris, Itälä-Remes, Maija, Gedde-Dahl, Tobias, Sierra, Jorge, Niederwieser, Dietger, Ljungman, Per, Beguin, Yves, and Ozkurt, Zubeyde Nur
- Subjects
CELL transplantation ,MYELODYSPLASTIC syndromes ,RED blood cell transfusion ,CHELATION ,BLOOD transfusion reaction ,CHELATION therapy ,LONGITUDINAL method ,FETOFETAL transfusion - Abstract
Most myelodysplastic syndromes (MDS)-patients receive multiple red blood cell transfusions (RBCT). Transfusions may cause iron-related toxicity and mortality, influencing outcome after allogeneic HSCT. This prospective non-interventional study evaluated 222 MDS and CMML patients undergoing HSCT. Overall survival (OS), relapse-free survival (RFS), non-relapse mortality (NRM), and relapse incidence (RI) at 36 months were 52%, 44%, 25%, and 31%, respectively. Age, percentage of marrow blasts and severe comorbidities impacted OS. RFS was significantly associated with RBCT burden prior to HSCT (HR: 1.7; p =.02). High ferritin levels had a significant negative impact on OS and RI, but no impact on NRM. Administration of iron chelation therapy prior to HSCT did not influence the outcome, but early iron reduction after HSCT (started before 6 months) improved RFS significantly after transplantation (56% in the control group vs. 90% in the treated group, respectively; p =.04). This study illustrates the impact of RBCT and related parameters on HSCT-outcome. Patients with an expected prolonged survival after transplantation may benefit from early iron reduction therapy after transplantation. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
5. Pretransplant Levels of CRP and Interleukin-6 Family Cytokines; Effects on Outcome after Allogeneic Stem Cell Transplantation.
- Author
-
Tvedt, Tor Henrik, Lie, Stein Atle, Reikvam, Håkon, Rye, Kristin Paulsen, Lindås, Roald, Gedde-Dahl, Tobias, Ahmed, Aymen Bushra, and Bruserud, Øystein
- Subjects
C-reactive protein ,INTERLEUKIN-6 ,STEM cell transplantation ,CYTOKINES ,GRAFT versus host disease ,COMORBIDITY ,THERAPEUTICS - Abstract
Several pretransplant factors, including CRP (C-reactive protein) levels, reflect the risk of complications after allogeneic stem cell transplantation. IL-6 induces CRP increase, and we therefore investigated the effects of pretransplant IL-6, soluble IL-6 receptors, IL-6 family cytokines and CRP serum levels on outcome for 100 consecutive allotransplant recipients. All patients had related donors, none had active infections and 99 patients were in complete remission before conditioning. The incidence of acute graft versus host disease (aGVHD) requiring treatment was 40%, survival at Day +100 82%, and overall survival 48%. Despite a significant correlation between pretransplant CRP and IL-6 levels, only CRP levels significantly influenced transplant-related mortality (TRM). However, CRP did not influence overall survival (OS). Pretransplant IL-31 influenced late TRM. Finally, there was a significant association between pretransplant IL-6 and early postconditioning weight gain (i.e., fluid retention), and this fluid retention was a risk factor for aGVHD, TRM and OS. To conclude, pretransplant CRP, IL-31 and early posttransplant fluid retention were independent risk factors for TRM and survival after allotransplantation. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
6. The Systemic Metabolic Profile Early after Allogeneic Stem Cell Transplantation: Effects of Adequate Energy Support Administered through Enteral Feeding Tube.
- Author
-
Tvedt, Tor Henrik Anderson, Skaarud, Kristin J., Tjønnfjord, Geir Erland, Gedde-Dahl, Tobias, Iversen, Per Ole, and Bruserud, Øystein
- Subjects
- *
STEM cell transplantation , *FEEDING tubes , *ENTERAL feeding , *TUBE feeding , *PARENTERAL feeding , *FOOD preservatives , *ALEMTUZUMAB , *BILE - Abstract
• The type of nutritional support seems to have relatively minor effects on the post-transplant metabolomic profile. • The metabolic profile of patients treated with standard-care nutritional support indicates an insufficient calorie intake compared with patients treated with individualized enteral nutritional support. Patients undergoing allogeneic stem cell transplantation usually require nutritional support. There is no consensus on whether enteral support through tube feeding should be preferred. A recent randomized study could not detect any difference between enteral and parenteral feeding with regard to post-transplant outcomes, whereas 2 retrospective studies described an association between enteral feeding and a favorable post-transplant outcome. We compared pre- and post-transplant plasma metabolomic profiles for 10 patients receiving mainly enteral nutritional support and 10 patients receiving mainly parenteral support. Samples were collected before conditioning and 3 weeks post-transplant; 824 metabolites were analyzed using mass spectrometry. The pretransplant metabolite profiles showed a significant overlap between the 2 groups. Post-transplant samples for both patient groups showed an increase of secondary bile acids and endocannabinoids, whereas reduced levels were seen for food preservatives, plasmalogens, and retinol metabolites. The main post-transplant differences between the groups were decreased levels of fatty acids and markers of mitochondrial activation in the control group, indicating that these patients had insufficient energy intake. A significant effect was also seen for heme/bilirubin metabolism for the parenteral support. To conclude, allotransplant recipients showed altered metabolic profiles early after transplantation; this was mainly due to the conditioning/transplantation/reconstitution, whereas the type of nutritional support had minor effects. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.