126 results on '"Spitzer B"'
Search Results
2. Dnmt3a regulates myeloproliferation and liver-specific expansion of hematopoietic stem and progenitor cells
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Guryanova, O A, Lieu, Y K, Garrett-Bakelman, F E, Spitzer, B, Glass, J L, Shank, K, Martinez, A B V, Rivera, S A, Durham, B H, Rapaport, F, Keller, M D, Pandey, S, Bastian, L, Tovbin, D, Weinstein, A R, Teruya-Feldstein, J, Abdel-Wahab, O, Santini, V, Mason, C E, Melnick, A M, Mukherjee, S, and Levine, R L
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- 2016
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3. Cutaneous involvement of disseminated adenovirus infection in an allogeneic stem cell transplant recipient
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Keyes, A., Mathias, M., Boulad, F., Lee, Y. J., Marchetti, M. A., Scaradavou, A., Spitzer, B., Papanicolaou, G. A., Wieczorek, I., and Busam, K. J.
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- 2016
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4. Obstructive sleep apnea and long sleep are associated with increased genetic risk of incident Diabetes Mellitus: the Hispanic Community Health Study/Study of Latinos
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Hrytsenko, Y., Spitzer, B., Cassidy, M., Wang, H., Bertisch, S.M., Taylor, K.D., Isasi, C.R., Cai, J., Kaplan, R., Qi, Q., Alcantara, C., Redline, S., and Sofer, T.
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- 2024
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5. Vibrotactile frequency discrimination and steady-state evoked responses in primary somatosensory cortex
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Spitzer, B, Wacker, E, and Blankenburg, F
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- 2009
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6. Determination of the carbon content of biomass—A prerequisite to estimate the complete biodegradation of polymers
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Spitzer, B., Mende, C., Menner, M., and Luck, T.
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- 1996
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7. THE IMPLEMENTATION OF THE RESEARCH DEVELOMENT AND INNOVATION PROGRAMS IN ROMANIA
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SPITZER Beatrix
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Research ,Development ,Innovation ,National Strategy of RDI ,National Plan of ,Business ,HF5001-6182 ,Finance ,HG1-9999 - Abstract
Starting from the main challenges and growth opportunities of Romania, and also considering the actual context of the social and economic developments, the aim of the paper is to analyse in terms of the research opportunities, the core activities that can be applied in Romania, in order to increase and support sustainable and favourable social inclusion. The analysis will be based on the National plan and the National strategy of the research, development and innovation projects that will also include sets of objectives that have close links for forecasting the results -of the national RDI system. At the same time, this program is supported by the state, which emphasizes the importance of the correct organization of funds in order to create activities necessary for the wellbeing of the society. Therefore, this work will also analyze the strategic orientation of the European Structural and Investment Funds for the period 2014-2020, learning from the lessons of the programming period between 2007-2013, in order to find out the answer to the research question: What are the main sectors in Romania where research development, and innovation projects would be needed as a priority? Following the qualitative analysis carried out by observation and comparison methods, it has been found that there are thirteen main areas that require the priority attention of the research, development, innovation programs, which are divided into two categories: smart specialization and public relevance. First, the field of smart specialization includes: bio-economy; information and communication technology, space and security; energy, environment and climate change; eco-nano-technologies and advanced materials. Secondly, the category of public relevance includes: the field of health; heritage and cultural identity and new and emerging technologies. Consequently, all of the above mentioned aspects are not possible without the stimulation of research and technological innovation programmes. Also through the correct application of the involution processes, using creativity and development-based entrepreneurship, it will be possible to train the population to generate credible program models, eventually this process becoming a lifestyle that will encourage the culture of innovation. Therefore, the purpose of RDI programs is to provide members of the global scientific community with an attractive development environment, involving both young researchers and top researchers from around the world.
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- 2020
8. Der Einfluss von Dopamin auf neuronale Aktivitätsmuster während emotionaler Reizverarbeitung im Nucleus subthalamicus bei Parkinsonpatienten.
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Hübl, J., Spitzer, B., Brücke, C., Schönecker, T., Kupsch, A., Alesch, F., Schneider, G.-H., and Kühn, A. A.
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- 2015
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9. A double-blind, randomized, parallel group study to compare the efficacy, safety and tolerability of slow-release oral morphine versus methadone in opioid-dependent in-patients willing to undergo detoxification [corrected] [published erratum appears in ADDICTION 2009 Nov;104(11):1947].
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Madlung-Kratzer E, Spitzer B, Brosch R, Dunkel D, and Haring C
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- 2009
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10. Recounting graphic sexual abuse memories in therapy: the impact of women's healing.
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Spitzer B and Avis JM
- Abstract
This retrospective study investigates the impact on women's functioning of recounting during their therapy the graphic details of sexual abuse they had experienced in childhood. Fifty-nine participants residing in Southern Ontario were divided into two groups: those who spent more time ( N=19) versus less time ( N=40) in therapy recounting graphic abuse details. Results revealed that the group who had spent more time recounting abuse memories: (a) had mean functioning scores that were significantly lower before and during therapy, but that did not significantly differ after therapy; (b) recovered more memories of abuse during therapy, and (c) were more likely to have participated in hypnosis, and to report having been encouraged to remember details of abuse. Participants rated as most therapeutic those approaches that assisted them to increase their understanding of the abuse. Strategies related to acceptance, understanding, and making meaning were most important in promoting healing. [ABSTRACT FROM AUTHOR]
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- 2006
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11. Risk of Anaphylaxis in Narcotic Drug Addicts Being Treated for Drug Rehabilitation.
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Maurer, U., Jarisch, R., Pollesbck, A., Hemmer, W., Wantke, F., and Spitzer, B.
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- 2012
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12. Determination of the carbon content of biomass -- a prerequisite to estimate the complete biodegradation of polymers
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Luck, T., Mende, C., Menner, M., and Spitzer, B.
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- 1996
13. Craniospinal irradiation and/or intraventricular radioimmunotherapy after high-dose chemotherapy and autologous stem cell rescue in patients with CNS retinoblastoma-Safety and outcomes.
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Sait SF, Kernan NA, Klein E, Spitzer B, Levy CF, Fish J, Yildirim O, Haque S, Donzelli M, Bernot MR, Abramson DH, Francis JH, Khakoo Y, Karajannis M, Sands S, Pandit-Taskar N, Wolden S, Kramer K, and Dunkel IJ
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- Humans, Male, Female, Retrospective Studies, Child, Preschool, Child, Infant, Combined Modality Therapy, Survival Rate, Central Nervous System Neoplasms therapy, Central Nervous System Neoplasms mortality, Retinal Neoplasms therapy, Retinal Neoplasms pathology, Retinal Neoplasms mortality, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Adolescent, Follow-Up Studies, Stem Cell Transplantation, Prognosis, Induction Chemotherapy, Hematopoietic Stem Cell Transplantation methods, Craniospinal Irradiation methods, Radioimmunotherapy methods, Retinoblastoma therapy, Retinoblastoma pathology, Retinoblastoma mortality, Transplantation, Autologous
- Abstract
Background: The prognosis for patients with central nervous system (CNS) retinoblastoma (RB) (trilateral or stage 4b metastatic RB) treated with high-dose chemotherapy and autologous stem cell transplant (HDC-ASCT) remains poor. The impact of irradiation when administered as part of upfront therapy post HDC-ASCT on treatment outcomes and survival is unknown., Methods: We performed a retrospective review of all patients with CNS RB (seven stage 4b, eight trilateral, one pineal lesion belonging to methylation group RB) who underwent induction chemotherapy with an intent to proceed to HDC-ASCT at two institutions., Results: Twelve of 16 patients (n = 75%) achieved an objective response to induction chemotherapy, while four patients had progressive/refractory disease; two patients responded to subsequent therapy and proceeded to ASCT, and two patients did not. Seven of 14 patients who underwent HDC-ASCT, received radiotherapy as part of upfront therapy post HDC-ASCT in the form of craniospinal irradiation (CSI) (n = 3), intraventricular radioimmunotherapy (n = 3), or both CSI and intraventricular radioimmunotherapy (n = 1). The Kaplan-Meier estimate of overall survival for these patients was 62.5% at 5 years; no patients developed second malignant neoplasms within the radiation fields. For the seven patients who did not receive radiotherapy, the overall survival was 28.6% at 5 years., Conclusions: CSI (23.4 Gy) alone or in conjunction with intraventricular RIT may have clinical utility in eliminating persistent MRD post HDC-ASCT, contributing to improved disease-free survival in patients with CNS RB. This treatment strategy merits evaluation in a prospective, multicenter clinical trial for patients with CNS metastatic RB., (© 2024 Wiley Periodicals LLC.)
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- 2024
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14. Gene-Excessive Sleepiness Interactions Suggest Treatment Targets for Obstructive Sleep Apnea Subtype.
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Nagarajan P, Kurniansyah N, Lee J, Gharib SA, Xu Y, Zhang Y, Spitzer B, Faquih T, Zhou H, Boerwinkle E, Chen H, Gottlieb DJ, Guo X, Heard-Costa NL, Hidalgo BA, Levy D, Liu PY, Mei H, Montalvan R, Mukherjee S, North KE, O'Conner GT, Palmer LJ, Patel SR, Psaty BM, Purcell SM, Raffield LM, Rich SS, Rotter JI, Saxena R, Smith AV, Stone KL, Zhu X, Cade BE, Sofer T, Redline S, and Wang H
- Abstract
Obstructive sleep apnea (OSA) is a multifactorial sleep disorder characterized by a strong genetic basis. Excessive daytime sleepiness (EDS) is a symptom that is reported by a subset of OSA patients, persisting even after treatment with continuous positive airway pressure (CPAP). It is recognized as a clinical subtype underlying OSA carrying alarming heightened cardiovascular risk. Thus, conceptualizing EDS as an exposure variable, we sought to investigate EDS's influence on genetic variation linked to apnea-hypopnea index (AHI), a diagnostic measure of OSA severity. This study serves as the first large-scale genome-wide gene x environment interaction analysis for AHI, investigating the interplay between its genetic markers and EDS across and within specific sex. Our work pools together whole genome sequencing data from seven cohorts, enabling a diverse dataset (four population backgrounds) of over 11,500 samples. Among the total 16 discovered genetic targets with interaction evidence with EDS, eight are previously unreported for OSA, including CCDC3 , MARCHF1 , and MED31 identified in all sexes; TMEM26 , CPSF4L , and PI4K2B identified in males; and RAP1GAP and YY1 identified in females. We discuss connections to insulin resistance, thiamine deficiency, and resveratrol use that may be worthy of therapeutic consideration for excessively sleepy OSA patients.
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- 2024
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15. Persistent or New Cytopenias Predict Relapse Better than Routine Bone Marrow Aspirate Evaluations After Hematopoietic Cell Transplantation for Acute Leukemia or Myelodysplastic Syndrome in Children and Young Adult Patients.
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Kernan NA, Klein E, Mauguen A, Torok-Castanza J, Prockop SE, Scaradavou A, Curran K, Spitzer B, Cancio M, Ruggiero J, Allen J, Harris A, Oved J, O'Reilly RJ, and Boelens JJ
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- Humans, Child, Male, Adolescent, Female, Young Adult, Adult, Child, Preschool, Retrospective Studies, Bone Marrow pathology, Neoplasm, Residual, Leukemia therapy, Infant, Acute Disease, Cytopenia, Hematopoietic Stem Cell Transplantation, Myelodysplastic Syndromes therapy, Recurrence
- Abstract
The clinical value of serial routine bone marrow aspirates (rBMAs) in the first year after allogeneic hematopoietic cell transplantation (alloHCT) to detect or predict relapse of acute leukemia (AL) and myelodysplastic syndrome (MDS) in pediatric and young adult patients is unclear. The purpose of this analysis was to determine if assessment of minimal residual disease (MRD) by multiparameter flow cytometry (MFC, MFC-MRD) or donor chimerism (DC) in rBMAs or serial complete blood counts (CBCs) done in the year after alloHCT predicted relapse of AL or MDS in pediatric and young adult patients. We completed a retrospective analysis of patients with AL or MDS who had rBMAs performed after alloHCT between January 2012 and June 2018. Bone marrow (BM) was evaluated at approximately 3, 6, and 12 months for disease recurrence by morphology, MFC-MRD, and percent DC by short tandem repeat molecular testing. CBCs were performed at every clinic visit. The main outcome of interest was an assessment of whether MFC-MRD or DC in rBMAs or serial CBCs done in the year after alloHCT predicted relapse in AL or MDS pediatric and young adult patients. A total of 121 recipients with a median age of 13 years (range 1 to 32) were included: 108 with AL and, 13 with MDS. A total of 423 rBMAs (median 3; 0 to 13) were performed. Relapse at 2 years was 23% (95% CI: 16% to 31%) and at 5 years 25% (95% CI: 18% to 33%). One hundred fifty-four of 157 (98%) rBMAs evaluated for MRD by MFC were negative and did not preclude subsequent relapse. Additionally, low DC (<95%) did not predict relapse and high DC (≥95%) did not preclude relapse. For patients alive without relapse at 1 year, BM DC (P = .74) and peripheral T-cell DC (P = .93) did not predict relapse. Six patients with low-level T-cell and/or BM DC had a total of 8 to 20 BM evaluations, none of these patients relapsed. However, CBC results were informative for relapse; 28 of 31 (90%) relapse patients presented with an abnormal CBC with peripheral blood (PB) blasts (16 patients), cytopenias (9 patients), or extramedullary disease (EMD, 3 patients). Two patients with BM blasts >5% on rBMA had circulating blasts within 5 weeks of rBMA. Neutropenia (ANC <1.5 K/mcl) at 1 year was predictive of relapse (P = .01). Neutropenia and thrombocytopenia (<160 K/mcl) were predictive of disease-free survival (DFS) with inferior DFS for ANC <1.5 K/mcl, P = .001, or platelet count <160 K/mcl (P = .04). These results demonstrate rBMAs after alloHCT assessed for MRD by MFC and/or for level of DC are poor predictors for relapse in pediatric and young adult patients with AL or MDS. Relapse in these patients presents with PB blasts, cytopenias, or EMD. ANC and platelet count at 1-year were highly predictive for DFS., (Copyright © 2024 The American Society for Transplantation and Cellular Therapy. Published by Elsevier Inc. All rights reserved.)
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- 2024
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16. Two novel assays demonstrate persistent daratumumab exposure in a pediatric patient with delayed engraftment following allogeneic hematopoietic stem cell transplantation.
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Major-Monfried H, Hosszu K, McAvoy DP, Vallone A, Shukla N, Gillio A, Spitzer B, Kung AL, Cancio M, Curran K, Scaradavou A, Oved JH, O'Reilly RJ, Boelens JJ, and Harris AC
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- Humans, Female, Adolescent, Precursor T-Cell Lymphoblastic Leukemia-Lymphoma therapy, Precursor T-Cell Lymphoblastic Leukemia-Lymphoma drug therapy, Graft Survival drug effects, Hematopoietic Stem Cell Transplantation methods, Antibodies, Monoclonal therapeutic use, Transplantation, Homologous methods
- Abstract
Background Aims: Daratumumab, a human IgG monoclonal antibody targeting CD38, is a promising treatment for pediatric patients with relapsed or refractory T-cell acute lymphoblastic leukemia (T-ALL). We describe a case of delayed engraftment following a mismatched, unrelated donor hematopoietic stem cell transplant (HSCT) in a 14-year-old female with relapsed T-ALL, treated with daratumumab and chemotherapy. By Day 28 post-HSCT, the patient had no neutrophil engraftment but full donor myeloid chimerism., Methods: We developed two novel, semi-quantitative, antibody-based assays to measure the patient's bound and plasma daratumumab levels to determine if prolonged drug exposure may have contributed to her slow engraftment., Results: Daratumumab levels were significantly elevated more than 30 days after the patient's final infusion, and levels inversely correlated with her white blood cell counts. To clear daratumumab, the patient underwent several rounds of plasmapheresis and subsequently engrafted., Conclusions: This is the first report of both delayed daratumumab clearance and delayed stem cell engraftment following daratumumab treatment in a pediatric patient. Further investigation is needed to elucidate the optimal dosing of daratumumab for treatment of acute leukemias in pediatric populations as well as daratumumab's potential effects on hematopoietic stem cells and stem cell engraftment following allogenic HSCT., Competing Interests: Declaration of Competing Interest The authors have no relevant conflicts of interest to declare., (Copyright © 2024. Published by Elsevier Inc.)
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- 2024
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17. Impact of rabbit anti-thymocyte globulin (ATG) exposure on outcomes after ex vivo T-cell-depleted hematopoietic cell transplantation in pediatric and young adult patients.
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Lakkaraja M, Mauguen A, Boulad F, Cancio MI, Curran KJ, Harris AC, Kernan NA, Klein E, Kung AL, Oved J, Prockop S, Scaradavou A, Spitzer B, O'Reilly RJ, and Boelens JJ
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- Humans, Child, Young Adult, Antilymphocyte Serum, Retrospective Studies, T-Lymphocytes, Transplantation Conditioning, Hematopoietic Stem Cell Transplantation adverse effects, Graft vs Host Disease
- Abstract
Background Aims: Traditional weight-based dosing of rabbit anti-thymocyte globulin (rATG) used in allogeneic hematopoietic cell transplantation (HCT) to prevent graft-versus-host disease (GVHD) and graft rejection leads to variable exposures. High exposures induce delayed CD4+immune reconstitution (CD4+IR) and greater mortality. We sought to determine the impact of rATG exposure in children and young adults receiving various types of EX-VIVO T-cell-depleted (EX-VIVO-TCD) HCT., Methods: Patients receiving their first EX-VIVO-TCD HCT (CliniMACS CD34+, Isolex or soybean lectin agglutination), with removal of residual T cells by E-rosette depletion (E-) between 2008 and 2018 at Memorial Sloan Kettering Cancer Center were retrospectively analyzed. rATG exposure post-HCT was estimated (AU*d/L) using a validated population pharmacokinetic model. Previously defined rATG-exposures, <30, 30-55, ≥55 AU*d/L, were related with outcomes of interest. Cox proportional hazard and cause-specific models were used for analyses., Results: In total, 180 patients (median age 11 years; range 0.1-44 years) were included, malignant 124 (69%) and nonmalignant 56 (31%). Median post-HCT rATG exposure was 32 (0-104) AU*d/L. Exposure <30 AU*d/L was associated with a 3-fold greater probability of CD4+IR (P < 0.001); 2- to 4-fold lower risk of death (P = 0.002); and 3- to 4-fold lower risk of non-relapse mortality (NRM) (P = 0.02). Cumulative incidence of NRM was 8-fold lower in patients who attained CD4+IR compared with those who did not (P < 0.0001). There was no relation between rATG exposure and aGVHD (P = 0.33) or relapse (P = 0.23). Effect of rATG exposure on outcomes was similar in three EX-VIVO-TCD methods., Conclusions: Individualizing rATG dosing to target a low rATG exposure post-HCT while maintaining total cumulative exposure may better predict CD4+IR, reduce NRM and increase overall survival, independent of the EX-VIVO-TCD method., Competing Interests: Declaration of competing interest KJC: research support: Novartis, Celgene, Cellectis, Atara Bio; consultant: Novartis, Atara Bio. SEP: support for the conduct of clinical trials: AlloVir, Jasper Therapeutics, Atara Biotherapeutics; consultation (last 24 months) CellEvolve, ADMA, Regeneron; intellectual property related to the use of third-party VSTs licensed to Atara Biotherapeutics with all rights assigned to Memorial Sloan Kettering Cancer Center. RJO: royalties following licensure of EBV-specific T-cell bank by Atara Biotherapeutics, research support and consultant fees from Atara Biotherapeutics. JJB: consulting Sobi, Bluebird Bio, Avrobio, BlueRock, SmartImmune, Sanofi, Omeros, Advanced Clinical (DMC Chair). All other authors have no commercial, proprietary or financial interest in the products or companies described in this article., (Copyright © 2024 International Society for Cell & Gene Therapy. Published by Elsevier Inc. All rights reserved.)
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- 2024
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18. Characterization of the Use and Efficacy of Isavuconazonium Sulfate in a Pediatric Oncology and Stem Cell Transplant Population: A Single Institution Retrospective Review.
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Kunvarjee B, Siver M, Mathew S, Steiger S, Lee YJ, and Spitzer B
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- Adult, Child, Humans, Retrospective Studies, Antifungal Agents, Triazoles, Stem Cell Transplantation, Invasive Fungal Infections drug therapy, Neoplasms drug therapy, Nitriles, Pyridines
- Abstract
Isavuconazonium sulfate (ISA) is a triazole antifungal approved for the treatment of invasive aspergillosis and mucormycosis in adults. This single-center, retrospective review of pediatric oncology and stem cell transplant patients receiving ISA for prophylaxis (n=20) or treatment (n=6) of invasive fungal disease (IFD) aims to characterize real-world clinical efficacy and toxicity of ISA in patients <18 years of age. Of 20 patients receiving ISA for prophylaxis, three patients had presumed breakthrough IFD (1 proven, 2 probable/possible). No adverse effects were attributed to ISA use or led to the discontinuation of therapy., Competing Interests: Y.J.L. has served as an investigator for Astellas, Karius, AiCuris, and Scynexis and has received research grant support from Merck & Co Inc. M.S. and B.S. are currently employed/are affiliated with Hackensack University Medical Center; S.M is currently employed/is affiliated with Pfizer; S.S. is currently employed/is affiliated with Takeda Pharmaceuticals. The remaining authors declare no conflict of interest., (Copyright © 2024 Wolters Kluwer Health, Inc. All rights reserved.)
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- 2024
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19. Over- and underweighting of extreme values in decisions from sequential samples.
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Clarmann von Clarenau V, Appelhoff S, Pachur T, and Spitzer B
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- Humans, Psychophysics, Decision Making
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People routinely make decisions based on samples of numerical values. A common conclusion from the literature in psychophysics and behavioral economics is that observers subjectively compress magnitudes, such that extreme values have less sway over people's decisions than prescribed by a normative model (underweighting). However, recent studies have reported evidence for anti-compression, that is, the relative overweighting of extreme values. Here, we investigate potential reasons for this discrepancy in findings and propose that it might reflect adaptive responses to different task requirements. We performed a large-scale study ( n = 586) of sequential numerical integration, manipulating (a) the task requirement (averaging a single stream or comparing two interleaved streams of numbers), (b) the distribution of sample values (uniform or Gaussian), and (c) their range (1-9 or 100-900). The data showed compression of subjective values in the averaging task, but anticompression in the comparison task. This pattern held for both distribution types and for both ranges. In model simulations, we show that either compression or anticompression can be beneficial for noisy observers, depending on the sample-level processing demands imposed by the task. This suggests that the empirically observed patterns of over- and underweighting might reflect adaptive responses. (PsycInfo Database Record (c) 2024 APA, all rights reserved).
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- 2024
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20. High-risk and silent clonal hematopoietic genotypes in patients with nonhematologic cancer.
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Stonestrom AJ, Menghrajani KN, Devlin SM, Franch-Expósito S, Ptashkin RN, Patel SY, Spitzer B, Wu X, Jee J, Sánchez Vela P, Milbank JH, Shah RH, Mohanty AS, Brannon AR, Xiao W, Berger MF, Mantha S, and Levine RL
- Subjects
- Humans, Aged, Hematopoiesis genetics, Mutation, Genotype, Clonal Hematopoiesis, Hematologic Neoplasms epidemiology, Hematologic Neoplasms genetics, Hematologic Neoplasms pathology
- Abstract
Abstract: Clonal hematopoiesis (CH) identified by somatic gene variants with variant allele fraction (VAF) ≥ 2% is associated with an increased risk of hematologic malignancy. However, CH defined by a broader set of genotypes and lower VAFs is ubiquitous in older individuals. To improve our understanding of the relationship between CH genotype and risk of hematologic malignancy, we analyzed data from 42 714 patients who underwent blood sequencing as a normal comparator for nonhematologic tumor testing using a large cancer-related gene panel. We cataloged hematologic malignancies in this cohort using natural language processing and manual curation of medical records. We found that some CH genotypes including JAK2, RUNX1, and XPO1 variants were associated with high hematologic malignancy risk. Chronic disease was predicted better than acute disease suggesting the influence of length bias. To better understand the implications of hematopoietic clonality independent of mutational function, we evaluated a set of silent synonymous and noncoding mutations. We found that silent CH, particularly when multiple variants were present or VAF was high, was associated with increased risk of hematologic malignancy. We tracked expansion of CH mutations in 26 hematologic malignancies sequenced with the same platform. JAK2 and TP53 VAF consistently expanded at disease onset, whereas DNMT3A and silent CH VAFs mostly decreased. These data inform the clinical and biological interpretation of CH in the context of nonhematologic cancer., (© 2024 by The American Society of Hematology. Licensed under Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0), permitting only noncommercial, nonderivative use with attribution. All other rights reserved.)
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- 2024
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21. Longitudinal clinical data improve survival prediction after hematopoietic cell transplantation using machine learning.
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Zhou Y, Smith J, Keerthi D, Li C, Sun Y, Mothi SS, Shyr DC, Spitzer B, Harris A, Chatterjee A, Chatterjee S, Shouval R, Naik S, Bertaina A, Boelens JJ, Triplett BM, Tang L, and Sharma A
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- Young Adult, Humans, Child, Transplantation, Homologous adverse effects, Bayes Theorem, Retrospective Studies, Prognosis, Hematopoietic Stem Cell Transplantation adverse effects
- Abstract
Abstract: Serial prognostic evaluation after allogeneic hematopoietic cell transplantation (allo-HCT) might help identify patients at high risk of lethal organ dysfunction. Current prediction algorithms based on models that do not incorporate changes to patients' clinical condition after allo-HCT have limited predictive ability. We developed and validated a robust risk-prediction algorithm to predict short- and long-term survival after allo-HCT in pediatric patients that includes baseline biological variables and changes in the patients' clinical status after allo-HCT. The model was developed using clinical data from children and young adults treated at a single academic quaternary-care referral center. The model was created using a randomly split training data set (70% of the cohort), internally validated (remaining 30% of the cohort) and then externally validated on patient data from another tertiary-care referral center. Repeated clinical measurements performed from 30 days before allo-HCT to 30 days afterwards were extracted from the electronic medical record and incorporated into the model to predict survival at 100 days, 1 year, and 2 years after allo-HCT. Naïve-Bayes machine learning models incorporating longitudinal data were significantly better than models constructed from baseline variables alone at predicting whether patients would be alive or deceased at the given time points. This proof-of-concept study demonstrates that unlike traditional prognostic tools that use fixed variables for risk assessment, incorporating dynamic variability using clinical and laboratory data improves the prediction of mortality in patients undergoing allo-HCT., (© 2024 by The American Society of Hematology. Licensed under Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0), permitting only noncommercial, nonderivative use with attribution. All other rights reserved.)
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- 2024
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22. Genome-wide association analysis of composite sleep health scores in 413,904 individuals.
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Goodman MO, Faquih T, Paz V, Nagarajan P, Lane JM, Spitzer B, Maher M, Chung J, Cade BE, Purcell SM, Zhu X, Noordam R, Phillips AJK, Kyle SD, Spiegelhalder K, Weedon MN, Lawlor DA, Rotter JI, Taylor KD, Isasi CR, Sofer T, Dashti HS, Rutter MK, Redline S, Saxena R, and Wang H
- Abstract
Recent genome-wide association studies (GWASs) of several individual sleep traits have identified hundreds of genetic loci, suggesting diverse mechanisms. Moreover, sleep traits are moderately correlated, and together may provide a more complete picture of sleep health, while also illuminating distinct domains. Here we construct novel sleep health scores (SHSs) incorporating five core self-report measures: sleep duration, insomnia symptoms, chronotype, snoring, and daytime sleepiness, using additive (SHS-ADD) and five principal components-based (SHS-PCs) approaches. GWASs of these six SHSs identify 28 significant novel loci adjusting for multiple testing on six traits (p<8.3e-9), along with 341 previously reported loci (p<5e-08). The heritability of the first three SHS-PCs equals or exceeds that of SHS-ADD (SNP-h
2 =0.094), while revealing sleep-domain-specific genetic discoveries. Significant loci enrich in multiple brain tissues and in metabolic and neuronal pathways. Post GWAS analyses uncover novel genetic mechanisms underlying sleep health and reveal connections to behavioral, psychological, and cardiometabolic traits.- Published
- 2024
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23. Geometry of visuospatial working memory information in miniature gaze patterns.
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Linde-Domingo J and Spitzer B
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- Humans, Cues, Attention, Memory, Short-Term, Eye Movements
- Abstract
Stimulus-dependent eye movements have been recognized as a potential confound in decoding visual working memory information from neural signals. Here we combined eye-tracking with representational geometry analyses to uncover the information in miniature gaze patterns while participants (n = 41) were cued to maintain visual object orientations. Although participants were discouraged from breaking fixation by means of real-time feedback, small gaze shifts (<1°) robustly encoded the to-be-maintained stimulus orientation, with evidence for encoding two sequentially presented orientations at the same time. The orientation encoding on stimulus presentation was object-specific, but it changed to a more object-independent format during cued maintenance, particularly when attention had been temporarily withdrawn from the memorandum. Finally, categorical reporting biases increased after unattended storage, with indications of biased gaze geometries already emerging during the maintenance periods before behavioural reporting. These findings disclose a wealth of information in gaze patterns during visuospatial working memory and indicate systematic changes in representational format when memory contents have been unattended., (© 2023. The Author(s).)
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- 2024
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24. T-cell depleted allogeneic hematopoietic stem cell transplant for the treatment of Fanconi anemia and MDS/AML.
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Satty AM, Klein E, Mauguen A, Kunvarjee B, Boelens JJ, Cancio M, Curran KJ, Kernan NA, Prockop SE, Scaradavou A, Spitzer B, Tamari R, Ruggiero J, Torok-Castanza J, Mehta PA, O'Reilly RJ, and Boulad F
- Subjects
- Humans, Young Adult, Adult, Retrospective Studies, Transplantation, Homologous adverse effects, Transplantation Conditioning methods, T-Lymphocytes, Fanconi Anemia therapy, Fanconi Anemia complications, Hematopoietic Stem Cell Transplantation methods, Leukemia, Myeloid, Acute, Graft vs Host Disease etiology
- Abstract
The only curative approach for myelodysplastic syndrome (MDS) or acute myeloid leukemia (AML) arising in patients with Fanconi anemia (FA) is allogeneic hematopoietic stem cell transplantation (HCT); however, HCT approaches are inconsistent and limited data on outcomes exist. We retrospectively evaluated outcomes of thirty patients with FA and MDS/AML who underwent first allogeneic HCT with a T-cell depleted (TCD) graft at our institution. Patients were transplanted on successive protocols with stepwise changes in cytoreduction and GVHD prophylaxis. All but two patients (93%) experienced durable hematopoietic engraftment. With median follow-up of 8.7 years, 5-year OS was 66.8% and DFS 53.8%. No significant differences in survival were found in patients with high-risk prognostic features (age ≥20 years, AML diagnosis, alternative donor graft) or when stratified by conditioning regimen. The 5-year cumulative incidences of relapse and NRM were 24.3% and 21.9%, respectively. NRM was higher in patients ≥20 years at HCT but did not otherwise differ. We herein demonstrate promising outcomes following allogeneic HCT for patients with FA and MDS/AML using TCD grafts, particularly in a cohort of high-risk patients with 50% ≥20 years and a majority receiving mismatched grafts. Future prospective studies are needed to compare this approach with other HCT platforms., (© 2023. The Author(s), under exclusive licence to Springer Nature Limited.)
- Published
- 2024
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25. Association between busulfan exposure and survival in patients undergoing a CD34+ selected stem cell transplantation.
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Tamari R, Scordo M, Kunvarjee BM, Proli A, Lin A, Flynn J, Cho C, Devlin S, Klein E, Boulad F, Cancio MI, Curran KJ, Jakubowski AA, Kernan NA, Kung AL, O'Reilly RJ, Papadopoulos EB, Prockop S, Scaradavou A, Shaffer BC, Shah G, Spitzer B, Gyurkocza B, Giralt SA, Perales MA, and Boelens JJ
- Subjects
- Humans, Child, Preschool, Child, Adolescent, Young Adult, Adult, Middle Aged, Aged, Retrospective Studies, Transplantation, Homologous, Transplantation Conditioning adverse effects, Busulfan adverse effects, Hematopoietic Stem Cell Transplantation adverse effects
- Abstract
Busulfan is an alkylating drug routinely used in conditioning regimens for allogeneic hematopoietic cell transplantation (allo-HCT). A myeloablative conditioning regimen, including busulfan, is commonly used in patients undergoing T-cell depletion (TCD) and allo-HCT, but data on optimal busulfan pharmacokinetic (PK) exposure in this setting are limited. Between 2012 and 2019, busulfan PK was performed to target an area under the curve exposure between 55 and 66 mg × h/L over 3 days using a noncompartmental analysis model. We retrospectively re-estimated busulfan exposure following the published population PK (popPK) model (2021) and correlated it with outcomes. To define optimal exposure, univariable models were performed with P splines, wherein hazard ratio (HR) plots were drawn, and thresholds were found graphically as the points at which the confidence interval crossed 1. Cox proportional hazard and competing risk models were used for analyses. 176 patients were included, with a median age of 59 years (range, 2-71). Using the popPK model, the median cumulative busulfan exposure was 63.4 mg × h/L (range, 46.3-90.7). The optimal threshold was at the upper limit of the lowest quartile (59.5 mg × h/L). 5-year overall survival (OS) with busulfan exposure ≥59.5 vs <59.5 mg × h/L was 67% (95% CI, 59-76) vs 40% (95% CI, 53-68), respectively (P = .02), and this association remained in a multivariate analyses (HR, 0.5; 95% CI, 0.29; 0.88; P = .02). In patients undergoing TCD allo-HCT, busulfan exposure is significantly associated with OS. The use of a published popPK model to optimize exposure may significantly improve the OS., (© 2023 by The American Society of Hematology. Licensed under Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0), permitting only noncommercial, nonderivative use with attribution. All other rights reserved.)
- Published
- 2023
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26. Immune profiling after allogeneic hematopoietic cell transplantation in pediatric acute myeloid leukemia.
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Shahid S, Ceglia N, Le Luduec JB, McPherson A, Spitzer B, Kontopoulos T, Bojilova V, Panjwani MK, Roshal M, Shah SP, Abdel-Wahab O, Greenbaum B, and Hsu KC
- Subjects
- Humans, Child, Transplantation, Homologous, Histocompatibility Antigens Class II, Recurrence, Leukemia, Myeloid, Acute, Hematopoietic Stem Cell Transplantation methods
- Abstract
Although allogeneic hematopoietic cell transplant (allo-HCT) is curative for high-risk pediatric acute myeloid leukemia (AML), disease relapse remains the primary cause of posttransplant mortality. To identify pressures imposed by allo-HCT on AML cells that escape the graft-versus-leukemia effect, we evaluated immune signatures at diagnosis and posttransplant relapse in bone marrow samples from 4 pediatric patients using a multimodal single-cell proteogenomic approach. Downregulation of major histocompatibility complex class II expression was most profound in progenitor-like blasts and accompanied by correlative changes in transcriptional regulation. Dysfunction of activated natural killer cells and CD8+ T-cell subsets at relapse was evidenced by the loss of response to interferon gamma, tumor necrosis factor α signaling via NF-κB, and interleukin-2/STAT5 signaling. Clonotype analysis of posttransplant relapse samples revealed an expansion of dysfunctional T cells and enrichment of T-regulatory and T-helper cells. Using novel computational methods, our results illustrate a diverse immune-related transcriptional signature in posttransplant relapses not previously reported in pediatric AML., (© 2023 by The American Society of Hematology. Licensed under Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0), permitting only noncommercial, nonderivative use with attribution. All other rights reserved.)
- Published
- 2023
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27. Clonal hematopoiesis in survivors of childhood cancer.
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Novetsky Friedman D, Chan ICC, Moskowitz CS, Li S, Turner K, Liu J, Bouvier N, Walsh MF, Spitzer B, Kung AL, Berger M, Cooper MA, Pusic I, Uy G, Link D, Druley TE, Diaz LA, Levine RL, Shukla N, and Bolton KL
- Subjects
- Humans, Child, Clonal Hematopoiesis, Mutation, Hematopoiesis genetics, Neoplasms genetics, Cancer Survivors
- Published
- 2023
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28. Clonal evolution during metastatic spread in high-risk neuroblastoma.
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Gundem G, Levine MF, Roberts SS, Cheung IY, Medina-Martínez JS, Feng Y, Arango-Ossa JE, Chadoutaud L, Rita M, Asimomitis G, Zhou J, You D, Bouvier N, Spitzer B, Solit DB, Dela Cruz F, LaQuaglia MP, Kushner BH, Modak S, Shukla N, Iacobuzio-Donahue CA, Kung AL, Cheung NV, and Papaemmanuil E
- Subjects
- Humans, Clonal Evolution, Mutation, Neoplasm Metastasis, Neoplasm Recurrence, Local genetics, Neuroblastoma genetics
- Abstract
Patients with high-risk neuroblastoma generally present with widely metastatic disease and often relapse despite intensive therapy. As most studies to date focused on diagnosis-relapse pairs, our understanding of the genetic and clonal dynamics of metastatic spread and disease progression remain limited. Here, using genomic profiling of 470 sequential and spatially separated samples from 283 patients, we characterize subtype-specific genetic evolutionary trajectories from diagnosis through progression and end-stage metastatic disease. Clonal tracing timed disease initiation to embryogenesis. Continuous acquisition of structural variants at disease-defining loci (MYCN, TERT, MDM2-CDK4) followed by convergent evolution of mutations targeting shared pathways emerged as the predominant feature of progression. At diagnosis metastatic clones were already established at distant sites where they could stay dormant, only to cause relapses years later and spread via metastasis-to-metastasis and polyclonal seeding after therapy., (© 2023. The Author(s), under exclusive licence to Springer Nature America, Inc.)
- Published
- 2023
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29. Genetic loci of beta-aminoisobutyric acid are associated with aging-related mild cognitive impairment.
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Granot-Hershkovitz E, Spitzer B, Yang Y, Tarraf W, Yu B, Boerwinkle E, Fornage M, Mosley TH, DeCarli C, Kristal BS, González HM, and Sofer T
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- Humans, Genetic Loci, Polymorphism, Single Nucleotide, Genome-Wide Association Study, Aging
- Abstract
We studied the genetic associations of a previously developed Metabolomic Risk Score (MRS) for Mild Cognitive Impairment (MCI) and beta-aminoisobutyric acid metabolite (BAIBA)-the metabolite highlighted by results from a genome-wide association study (GWAS) of the MCI-MRS, and assessed their association with MCI in datasets of diverse race/ethnicities. We first performed a GWAS for the MCI-MRS and BAIBA, in Hispanic/Latino adults (n = 3890) from the Hispanic Community Health Study/Study of Latinos (HCHS/SOL). We identified ten independent genome-wide significant (p value <5 × 10
-8 ) variants associated with MCI-MRS or BAIBA. Variants associated with the MCI-MRS are located in the Alanine-Glyoxylate Aminotransferase 2 (AGXT2 gene), which is known to be associated with BAIBA metabolism. Variants associated with BAIBA are located in the AGXT2 gene and in the SLC6A13 gene. Next, we tested the variants' association with MCI in independent datasets of n = 3178 HCHS/SOL older individuals, n = 3775 European Americans, and n = 1032 African Americans from the Atherosclerosis Risk In Communities (ARIC) study. Variants were considered associated with MCI if their p value <0.05 in the meta-analysis of the three datasets and their direction of association was consistent with expectation. Rs16899972 and rs37369 from the AGXT2 region were associated with MCI. Mediation analysis supported the mediation effect of BAIBA between the two genetic variants and MCI (p value = 0.004 for causal mediated effect). In summary, genetic variants in the AGXT2 region are associated with MCI in Hispanic/Latino, African, and European American populations in the USA, and their effect is likely mediated by changes in BAIBA levels., (© 2023. The Author(s).)- Published
- 2023
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30. Interaction analysis of ancestry-enriched variants with APOE-ɛ4 on MCI in the Study of Latinos-Investigation of Neurocognitive Aging.
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Granot-Hershkovitz E, Xia R, Yang Y, Spitzer B, Tarraf W, Vásquez PM, Lipton RB, Daviglus M, Argos M, Cai J, Kaplan R, Fornage M, DeCarli C, Gonzalez HM, and Sofer T
- Subjects
- Humans, Aging genetics, Hispanic or Latino genetics, Alzheimer Disease genetics, Apolipoprotein E4 genetics, Cognitive Dysfunction genetics, Cognitive Dysfunction epidemiology
- Abstract
APOE-ɛ4 risk on Mild Cognitive Impairment (MCI) and Alzheimer's Disease (AD) differs between race/ethnic groups, presumably due to ancestral genomic background surrounding the APOE locus. We studied whether African and Amerindian ancestry-enriched genetic variants in the APOE region modify the effect of the APOE-ɛ4 alleles on Mild Cognitive Impairment (MCI) in Hispanics/Latinos. We defined African and Amerindian ancestry-enriched variants as those common in one Hispanic/Latino parental ancestry and rare in the other two. We identified such variants in the APOE region with a predicted moderate impact based on the SnpEff tool. We tested their interaction with APOE-ɛ4 on MCI in the Study of Latinos-Investigation of Neurocognitive Aging (SOL-INCA) population and African Americans from the Atherosclerosis Risk In Communities (ARIC) study. We identified 5 Amerindian and 14 African enriched variants with an expected moderate effect. A suggestive significant interaction (p-value = 0.01) was found for one African-enriched variant, rs8112679, located in the ZNF222 gene fourth exon. Our results suggest there are no ancestry-enriched variants with large effect sizes of interaction effects with APOE-ɛ4 on MCI in the APOE region in the Hispanic/Latino population. Further studies are needed in larger datasets to identify potential interactions with smaller effect sizes., (© 2023. The Author(s).)
- Published
- 2023
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31. Durable Engraftment and Excellent Overall Survival After CD34-Selected Peripheral Blood Stem Cell Boost in Pediatric Patients With Poor Graft Function Following Allogeneic Stem Cell Transplantation.
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Fraint E, Farooki S, Klein E, Mauguen A, Prockop SE, Scaradavou A, Curran K, Cancio M, Spitzer B, Boelens JJ, Oved J, Harris A, O'Reilly RJ, and Kernan NA
- Subjects
- Humans, Child, Retrospective Studies, Transplantation, Homologous adverse effects, Antigens, CD34 analysis, Granulocyte Colony-Stimulating Factor therapeutic use, Peripheral Blood Stem Cells, Hematopoietic Stem Cell Transplantation adverse effects, Graft vs Host Disease etiology
- Abstract
Poor graft function (PGF) is a life-threatening complication after allogeneic stem cell transplantation (alloSCT). Historically, outcomes of patients with PGF have been very poor, and there are no standardized approaches to treatment. Furthermore, few outcomes after CD34-selected stem cell boost (CD34+SCB) for PGF in pediatric alloSCT recipients have been reported. Here we report on a single center experience with CD34+SCB for PGF after alloSCT in patients treated on the Pediatric Transplant and Cellular Therapy Service at MSK Kids, Memorial Sloan Kettering Cancer Center. A retrospective analysis of patients transplanted for malignant and nonmalignant disorders who received a CD34+SCB between 2008 to 2020 for treatment of PGF defined as the need for granulocyte colony-stimulating factor (G-CSF) and/or packed red blood cell or platelet transfusion support with bone marrow donor chimerism ≥85%. Peripheral blood stem cells from the original donor were the source for CD34+SCB. Durable complete recovery (durable CR) was defined as recovery of peripheral blood counts without recurrent need for G-CSF or transfusion support. The main outcomes of interest were recovery of hematopoiesis and overall survival. Development of graft versus host disease (GVHD) was an additional outcome of interest. Fourteen patients with PGF received a boost. Six patients had no known infection, while 8 patients had PGF associated with an infection. The probability of CR at 60 days was 79% (95% confidence interval [CI], 57%-100%). The overall survival at both 2 and 5 years was 78% (95% CI, 56%-100%). One patient developed GVHD, which was fatal. No other CD34+SCB-related toxicities were observed. While including patients with PGF as recently defined by the American Society for Transplantation and Cellular Therapy, as well as PGF in patients with concomitant infections, we demonstrate that CD34+SCB is safe and can provide for durable trilineage hematopoietic recovery and long-term survival in pediatric patients after alloSCT., (Copyright © 2022 The American Society for Transplantation and Cellular Therapy. Published by Elsevier Inc. All rights reserved.)
- Published
- 2023
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32. Lack of complete response pretransplant is not associated with inferior overall survival for stage 4a metastatic retinoblastoma.
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Farouk Sait S, Bernot MR, Klein E, Abramson DH, Francis JH, Gilheeney S, Karajannis MA, Spitzer B, Wolden S, Dunkel IJ, and Kernan NA
- Subjects
- Humans, Disease-Free Survival, Retrospective Studies, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Transplantation, Autologous, Treatment Outcome, Retinoblastoma therapy, Hematopoietic Stem Cell Transplantation, Retinal Neoplasms therapy, Osteosarcoma
- Abstract
Background: Stage 4a metastatic retinoblastoma (RB) is curable with intensive multimodality therapy including myeloablative chemotherapy with autologous stem cell transplant (HDC-ASCT) and involved field radiation therapy (IFRT). To our knowledge, no data exist on the impact of (a) pre-ASCT disease status, and (b) IFRT to sites of metastatic disease post ASCT on survival., Procedure: We retrospectively reviewed patients with stage 4a metastatic RB who underwent induction chemotherapy followed by HDC-ASCT, with or without IFRT, to residual tumor sites at Memorial Sloan Kettering Cancer Center (MSKCC) (n = 24)., Results: The degree of postinduction response prior to ASCT did not affect outcome, with 5-year overall survival (OS) of 68% and 86% in patients who achieved complete response (CR) and very good partial response (VGPR)/partial response (PR) prior to ASCT, respectively. IFRT administered post ASCT in patients with possible residual bony metastatic disease increases the likelihood of developing osteosarcoma in the radiation field., Conclusion: OS for patients with stage 4a metastatic RB treated with ASCT with VGPR or PR to pretransplant chemotherapy was not significantly different from patients with CR. In addition, IFRT does not seem to be required for bony disease control and increased the likelihood of developing osteosarcoma., (© 2022 Wiley Periodicals LLC.)
- Published
- 2023
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33. Control over sampling boosts numerical evidence processing in human decisions from experience.
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Appelhoff S, Hertwig R, and Spitzer B
- Subjects
- Humans, Choice Behavior, Decision Making, Electroencephalography
- Abstract
When acquiring information about choice alternatives, decision makers may have varying levels of control over which and how much information they sample before making a choice. How does control over information acquisition affect the quality of sample-based decisions? Here, combining variants of a numerical sampling task with neural recordings, we show that control over when to stop sampling can enhance (i) behavioral choice accuracy, (ii) the build-up of parietal decision signals, and (iii) the encoding of numerical sample information in multivariate electroencephalogram patterns. None of these effects were observed when participants could only control which alternatives to sample, but not when to stop sampling. Furthermore, levels of control had no effect on early sensory signals or on the extent to which sample information leaked from memory. The results indicate that freedom to stop sampling can amplify decisional evidence processing from the outset of information acquisition and lead to more accurate choices., (© The Author(s) 2022. Published by Oxford University Press.)
- Published
- 2022
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34. EEG-representational geometries and psychometric distortions in approximate numerical judgment.
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Appelhoff S, Hertwig R, and Spitzer B
- Subjects
- Humans, Psychometrics, Judgment, Electroencephalography
- Abstract
When judging the average value of sample stimuli (e.g., numbers) people tend to either over- or underweight extreme sample values, depending on task context. In a context of overweighting, recent work has shown that extreme sample values were overly represented also in neural signals, in terms of an anti-compressed geometry of number samples in multivariate electroencephalography (EEG) patterns. Here, we asked whether neural representational geometries may also reflect a relative underweighting of extreme values (i.e., compression) which has been observed behaviorally in a great variety of tasks. We used a simple experimental manipulation (instructions to average a single-stream or to compare dual-streams of samples) to induce compression or anti-compression in behavior when participants judged rapid number sequences. Model-based representational similarity analysis (RSA) replicated the previous finding of neural anti-compression in the dual-stream task, but failed to provide evidence for neural compression in the single-stream task, despite the evidence for compression in behavior. Instead, the results indicated enhanced neural processing of extreme values in either task, regardless of whether extremes were over- or underweighted in subsequent behavioral choice. We further observed more general differences in the neural representation of the sample information between the two tasks. Together, our results indicate a mismatch between sample-level EEG geometries and behavior, which raises new questions about the origin of common psychometric distortions, such as diminishing sensitivity for larger values., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2022 Appelhoff et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
- Published
- 2022
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35. De Novo myelodysplastic syndromes in patients 20-50 years old are enriched for adverse risk features.
- Author
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Epstein-Peterson ZD, Spitzer B, Derkach A, Arango JE, McCarter JGW, Medina-Martínez JS, McGovern E, Farnoud NR, Levine RL, and Tallman MS
- Subjects
- Adult, Humans, Middle Aged, Mutation, Prognosis, Risk Factors, Young Adult, Hematopoietic Stem Cell Transplantation methods, Myelodysplastic Syndromes diagnosis, Myelodysplastic Syndromes genetics, Myelodysplastic Syndromes therapy
- Abstract
Data concerning the treatment approach and clinical outcomes in younger patients with myelodysplastic syndromes (MDS) are lacking. Furthermore, published results from genomic profiling in the young adult MDS population are few. We identified patients aged 20-50 at diagnosis evaluated for de novo MDS at our institution over a 32-year period. Clinical information and results from sequencing panels were extracted for analysis. 68 eligible patients were found, including 32% with multilineage dysplasia and 29% with excess blasts-2 WHO subtypes. Revised International Prognostic Scoring System for MDS (IPSS-R) categorization had 47% high/very high-risk, and this classification held prognostic significance. The median overall survival was 59 months, and most patients (75%) underwent allogeneic hematopoietic cell transplantation (alloHCT). Thirty-four patients had mutational profiling; the most commonly mutated gene was TP53 and most commonly altered gene category was epigenetic regulators. Younger patients with de novo MDS represented a unique subset with high-risk disease features (adverse cytogenetics, higher R-IPSS) frequently observed along with alterations in TP53 and genes related to epigenetic and transcription pathways., (Copyright © 2022 Elsevier Ltd. All rights reserved.)
- Published
- 2022
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36. Bone Marrow Surveillance of Pediatric Cancer Survivors Identifies Clones that Predict Therapy-Related Leukemia.
- Author
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Spitzer B, Rutherford KD, Gundem G, McGovern EM, Millard NE, Arango Ossa JE, Cheung IY, Gao T, Levine MF, Zhang Y, Medina-Martínez JS, Feng Y, Ptashkin RN, Bolton KL, Farnoud N, Zhou Y, Patel MA, Asimomitis G, Cobbs CC, Mohibullah N, Huberman KH, Arcilla ME, Kushner BH, Modak S, Kung AL, Zehir A, Levine RL, Armstrong SA, Cheung NKV, and Papaemmanuil E
- Subjects
- Adult, Bone Marrow pathology, Child, Clone Cells, Humans, Cancer Survivors, Leukemia, Myeloid, Acute genetics, Neuroblastoma pathology
- Abstract
Purpose: Therapy-related myelodysplastic syndrome and acute leukemias (t-MDS/AL) are a major cause of nonrelapse mortality among pediatric cancer survivors. Although the presence of clonal hematopoiesis (CH) in adult patients at cancer diagnosis has been implicated in t-MDS/AL, there is limited published literature describing t-MDS/AL development in children., Experimental Design: We performed molecular characterization of 199 serial bone marrow samples from 52 patients treated for high-risk neuroblastoma, including 17 with t-MDS/AL (transformation), 14 with transient cytogenetic abnormalities (transient), and 21 without t-MDS/AL or cytogenetic alterations (neuroblastoma-treated control). We also evaluated for CH in a cohort of 657 pediatric patients with solid tumor., Results: We detected at least one disease-defining alteration in all cases at t-MDS/AL diagnosis, most commonly TP53 mutations and KMT2A rearrangements, including involving two novel partner genes (PRDM10 and DDX6). Backtracking studies identified at least one t-MDS/AL-associated mutation in 13 of 17 patients at a median of 15 months before t-MDS/AL diagnosis (range, 1.3-32.4). In comparison, acquired mutations were infrequent in the transient and control groups (4/14 and 1/21, respectively). The relative risk for development of t-MDS/AL in the presence of an oncogenic mutation was 8.8 for transformation patients compared with transient. Unlike CH in adult oncology patients, TP53 mutations were only detectable after initiation of cancer therapy. Last, only 1% of pediatric patients with solid tumor evaluated had CH involving myeloid genes., Conclusions: These findings demonstrate the clinical relevance of identifying molecular abnormalities in predicting development of t-MDS/AL and should guide the formation of intervention protocols to prevent this complication in high-risk pediatric patients., (©2022 American Association for Cancer Research.)
- Published
- 2022
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37. Asymmetric reinforcement learning facilitates human inference of transitive relations.
- Author
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Ciranka S, Linde-Domingo J, Padezhki I, Wicharz C, Wu CM, and Spitzer B
- Subjects
- Animals, Humans, Judgment, Learning, Reinforcement, Psychology
- Abstract
Humans and other animals are capable of inferring never-experienced relations (for example, A > C) from other relational observations (for example, A > B and B > C). The processes behind such transitive inference are subject to intense research. Here we demonstrate a new aspect of relational learning, building on previous evidence that transitive inference can be accomplished through simple reinforcement learning mechanisms. We show in simulations that inference of novel relations benefits from an asymmetric learning policy, where observers update only their belief about the winner (or loser) in a pair. Across four experiments (n = 145), we find substantial empirical support for such asymmetries in inferential learning. The learning policy favoured by our simulations and experiments gives rise to a compression of values that is routinely observed in psychophysics and behavioural economics. In other words, a seemingly biased learning strategy that yields well-known cognitive distortions can be beneficial for transitive inferential judgements., (© 2022. The Author(s).)
- Published
- 2022
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38. Antithymocyte globulin exposure in CD34+ T-cell-depleted allogeneic hematopoietic cell transplantation.
- Author
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Lakkaraja M, Scordo M, Mauguen A, Cho C, Devlin S, Ruiz JD, Klein E, Avecilla ST, Boulad F, Cancio MI, Curran KJ, Jakubowski AA, Kernan NA, Kung AL, O'Reilly RJ, Papadopoulos EB, Prockop S, van Roessel I, Scaradavou A, Shaffer BC, Shah G, Spitzer B, Tamari R, Giralt SA, Perales MA, and Boelens JJ
- Subjects
- Antigens, CD34, Humans, Neoplasm Recurrence, Local, Retrospective Studies, T-Lymphocytes, Antilymphocyte Serum pharmacology, Antilymphocyte Serum therapeutic use, Hematopoietic Stem Cell Transplantation adverse effects, Hematopoietic Stem Cell Transplantation methods
- Abstract
Traditional weight-based dosing results in variable rabbit antithymocyte globulin (rATG) clearance that can delay CD4+ T-cell immune reconstitution (CD4+ IR) leading to higher mortality. In a retrospective pharmacokinetic/pharmacodynamic (PK/PD) analysis of patients undergoing their first CD34+ T-cell-depleted (TCD) allogeneic hematopoietic cell transplantation (HCT) after myeloablative conditioning with rATG, we estimated post-HCT rATG exposure as area under the curve (arbitrary unit per day/milliliter [AU × day/mL]) using a validated population PK model. We related rATG exposure to nonrelapse mortality (NRM), CD4+ IR (CD4+ ≥50 cells per µL at 2 consecutive measures within 100 days after HCT), overall survival, relapse, and acute graft-versus-host disease (aGVHD) to define an optimal rATG exposure. We used Cox proportional hazard models and multistate competing risk models for analysis. In all, 554 patients were included (age range, 0.1-73 years). Median post-HCT rATG exposure was 47 AU × day/mL (range, 0-101 AU × day/mL). Low post-HCT area under the curve (<30 AU × day/mL) was associated with lower risk of NRM (P < .01) and higher probability of achieving CD4+ IR (P < .001). Patients who attained CD4+ IR had a sevenfold lower 5-year NRM (P < .0001). The probability of achieving CD4+ IR was 2.5-fold higher in the <30 AU × day/mL group compared with 30-55 AU × day/mL and threefold higher in the <30 AU × day/mL group compared with the ≥55 AU × day/mL group. In multivariable analyses, post-HCT rATG exposure ≥55 AU × day/mL was associated with an increased risk of NRM (hazard ratio, 3.42; 95% confidence interval, 1.26-9.30). In the malignancy subgroup (n = 515), a tenfold increased NRM was observed in the ≥55 AU × day/mL group, and a sevenfold increased NRM was observed in the 30-55 AU × day/mL group compared with the <30 AU × day/mL group. Post-HCT rATG exposure ≥55 AU × day/mL was associated with higher risk of a GVHD (hazard ratio, 2.28; 95% confidence interval, 1.01-5.16). High post-HCT rATG exposure is associated with higher NRM secondary to poor CD4+ IR after TCD HCT. Using personalized PK-directed rATG dosing to achieve optimal exposure may improve survival after HCT., (© 2022 by The American Society of Hematology. Licensed under Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0), permitting only noncommercial, nonderivative use with attribution. All other rights reserved.)
- Published
- 2022
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39. Therapeutic Efficacy of Combined JAK1/2, Pan-PIM, and CDK4/6 Inhibition in Myeloproliferative Neoplasms.
- Author
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Rampal RK, Pinzon-Ortiz M, Somasundara AVH, Durham B, Koche R, Spitzer B, Mowla S, Krishnan A, Li B, An W, Derkach A, Devlin S, Rong X, Longmire T, Eisman SE, Cordner K, Whitfield JT, Vanasse G, Cao ZA, and Levine RL
- Subjects
- Animals, Cyclin-Dependent Kinase 4 metabolism, Cyclin-Dependent Kinase 6, Humans, Janus Kinase 1, Janus Kinase 2 metabolism, Mice, Nitriles pharmacology, Protein Kinase Inhibitors pharmacology, Protein Kinase Inhibitors therapeutic use, Signal Transduction, Myeloproliferative Disorders drug therapy, Myeloproliferative Disorders genetics, Myeloproliferative Disorders metabolism, Neoplasms, Primary Myelofibrosis
- Abstract
Purpose: The JAK1/2 inhibitor ruxolitinib has demonstrated significant benefits for patients with myeloproliferative neoplasms (MPN). However, patients often lose response to ruxolitinib or suffer disease progression despite therapy with ruxolitinib. These observations have prompted efforts to devise treatment strategies to improve therapeutic efficacy in combination with ruxolitinib therapy. Activation of JAK-STAT signaling results in dysregulation of key downstream pathways, notably increased expression of cell-cycle mediators including CDC25A and the PIM kinases., Experimental Design: Given the involvement of cell-cycle mediators in MPNs, we sought to examine the efficacy of therapy combining ruxolitinib with a CDK4/6 inhibitor (LEE011) and a PIM kinase inhibitor (PIM447). We utilized JAK2-mutant cell lines, murine models, and primary MPN patient samples for these studies., Results: Exposure of JAK2-mutant cell lines to the triple combination of ruxolitinib, LEE011, and PIM447 resulted in expected on-target pharmacodynamic effects, as well as increased apoptosis and a decrease in the proportion of cells in S-phase, compared with ruxolitinib. As compared with ruxolitinib monotherapy, combination therapy led to reductions in spleen and liver size, reduction of bone marrow reticulin fibrosis, improved overall survival, and elimination of disease-initiating capacity of treated bone marrow, in murine models of MPN. Finally, the triple combination reduced colony formation capacity of primary MPN patient samples to a greater extent than ruxolitinib., Conclusions: The triple combination of ruxolitinib, LEE011, and PIM447 represents a promising therapeutic strategy with the potential to increase therapeutic responses in patients with MPN., (©2021 American Association for Cancer Research.)
- Published
- 2021
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40. Concomitant placement of dialysis and infusion catheters in the right internal jugular vein in the intensive care setting: Is it safe?
- Author
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Spitzer B, Kirkland K, Reyes J, Helmer SD, Ammar C, and Subbarao C
- Subjects
- Adult, Aged, Catheter Obstruction etiology, Catheter-Related Infections etiology, Catheterization, Central Venous adverse effects, Device Removal, Female, Humans, Infusions, Intravenous, Intensive Care Units, Male, Middle Aged, Renal Dialysis adverse effects, Retrospective Studies, Risk Assessment, Risk Factors, Time Factors, Treatment Outcome, Venous Thrombosis etiology, Catheterization, Central Venous instrumentation, Catheters, Indwelling, Central Venous Catheters, Renal Dialysis instrumentation
- Abstract
Purpose: This study examined the safety and efficacy of placing both a central venous dialysis catheter and a central venous catheter for infusion in the right internal jugular vein compared to only a central venous dialysis catheter., Methods: We conducted a retrospective chart review for all adult patients who underwent the placement of the right internal jugular dialysis catheter by a single surgeon. Patients were grouped based on whether they received a tunneled dual lumen dialysis catheter alone or in combination with a central venous infusion catheter in the right internal jugular vein. Catheter-related thrombosis, line infections, line malfunctions, pneumothorax, and need for line replacement were evaluated., Results: There were 97 patients in the dialysis catheter and central venous infusion line group and 63 patients in the dialysis catheter only group. The two groups were not different with regard to age (62.1 ± 16.3 years vs 57.9 ± 17.6 years) and gender (47.4% male vs 55.6% male). No significant differences were found in the incidence of thrombosis (1.0 % vs 0.0%, p > 0.999), line infection (2.1% vs 0.0%, p = 0.519), or line malfunctions (2.1% vs 0.0%, p = 0.516) in patients who did or did not have a central venous infusion catheter placed concomitantly with the dialysis catheter, respectively. No patients in either group had a pneumothorax., Conclusions: Although not currently utilized with frequency, these preliminary data indicate that placing both a dual lumen dialysis catheter and central venous infusion catheter in the right internal jugular simultaneously could be a viable option.
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- 2021
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41. ETV6-FLT3-positive myeloid/lymphoid neoplasm with eosinophilia presenting in an infant: an entity distinct from JMML.
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Spitzer B, Dela Cruz FS, Ibanez Sanchez GD, Zhang Y, Xiao W, Benayed R, Markova A, Rodriguez-Sanchez MI, Bouvier N, Roshal M, Kung AL, and Shukla N
- Subjects
- Adult, Humans, Infant, fms-Like Tyrosine Kinase 3 genetics, Eosinophilia diagnosis, Eosinophilia drug therapy, Leukemia, Leukemia, Myelomonocytic, Juvenile, Lymphoma, Myeloproliferative Disorders
- Abstract
Myeloid/lymphoid neoplasm with eosinophilia (MLN-Eo) is a World Health Organization (WHO) established category of hematologic malignancies primarily arising in adults. We discuss an 8-month-old infant who presented with clinical features similar to those of juvenile myelomonocytic leukemia (JMML) but who was diagnosed with MLN-Eo driven by an ETV6-FLT3 fusion. Results of patient-derived leukemia ex vivo studies demonstrated increased sensitivity to type I FLT3 inhibitors as compared with type II inhibitors. Treatment with the type I inhibitor gilteritinib resulted in complete immunophenotypic and cytogenetic remission. This patient subsequently underwent a hematopoietic stem cell transplant and remains in complete remission 1 year later. This is the youngest patient reported with an ETV6-FLT3 fusion and adds to the mounting reports of FLT3-rearranged MLN-Eo, supporting its addition to the WHO classification. Furthermore, this case highlights the clinical utility of ex vivo drug testing of targeted therapies., (© 2021 by The American Society of Hematology.)
- Published
- 2021
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42. Concurrent visual working memory bias in sequential integration of approximate number.
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Kang Z and Spitzer B
- Subjects
- Adult, Female, Healthy Volunteers, Humans, Male, Young Adult, Attention, Decision Making, Memory, Short-Term, Visual Perception
- Abstract
Previous work has shown bidirectional crosstalk between Working Memory (WM) and perception such that the contents of WM can alter concurrent percepts and vice versa. Here, we examine WM-perception interactions in a new task setting. Participants judged the proportion of colored dots in a stream of visual displays while concurrently holding location- and color information in memory. Spatiotemporally resolved psychometrics disclosed a modulation of perceptual sensitivity consistent with a bias of visual spatial attention towards the memorized location. However, this effect was short-lived, suggesting that the visuospatial WM information was rapidly deprioritized during processing of new perceptual information. Independently, we observed robust bidirectional biases of categorical color judgments, in that perceptual decisions and mnemonic reports were attracted to each other. These biases occurred without reductions in overall perceptual sensitivity compared to control conditions without a concurrent WM load. The results conceptually replicate and extend previous findings in visual search and suggest that crosstalk between WM and perception can arise at multiple levels, from sensory-perceptual to decisional processing.
- Published
- 2021
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43. Toward More Complete Prognostication for Patients with Clonal Hematopoiesis.
- Author
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Spitzer B and Levine RL
- Abstract
The study of clonal hematopoiesis is rapidly evolving, with the highest prevalence in aging populations and wide-ranging implications for health and disease, including an increased risk of subsequent myeloid malignancies and cardiovascular disease. In their article, Feusier and colleagues report on an expanded driver mutation list for capture of higher-risk clonal hematopoiesis mutations implicated in leukemia transformation. They also describe the prevalence of clonal hematopoiesis in several additional large studies, including, most importantly, in the pediatric context, which has not yet been extensively studied with respect to clonal hematopoiesis and clonal hematopoiesis-related sequelae. See related article by Feusier et al., p. 226., (©2021 American Association for Cancer Research.)
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- 2021
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44. CD4+ T-cell reconstitution predicts survival outcomes after acute graft-versus-host-disease: a dual-center validation.
- Author
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de Koning C, Prockop S, van Roessel I, Kernan N, Klein E, Langenhorst J, Szanto C, Belderbos M, Bierings M, Boulad F, Bresters D, Cancio M, Curran K, Kollen W, O'Reilly R, Scaradavou A, Spitzer B, Versluijs B, Huitema A, Lindemans C, Nierkens S, and Boelens JJ
- Subjects
- Acute Disease, Adolescent, Allografts, Child, Child, Preschool, Female, Follow-Up Studies, Graft vs Host Disease mortality, Humans, Infant, Kaplan-Meier Estimate, Male, Proportional Hazards Models, Retrospective Studies, Severity of Illness Index, Treatment Outcome, Young Adult, CD4 Lymphocyte Count, CD4-Positive T-Lymphocytes immunology, Graft vs Host Disease immunology, Hematopoietic Stem Cell Transplantation adverse effects, Immune Reconstitution
- Abstract
Acute graft-versus-host-Disease (aGVHD) is a major cause of morbidity and mortality after allogeneic hematopoietic cell transplantation (HCT). We previously showed that early CD4+ T-cell immune reconstitution (IR; CD4+ IR) predicts survival after HCT. Here, we studied the relation between CD4+ IR and survival in patients developing aGVHD. Pediatric patients undergoing first allogeneic HCT at University Medical Center Utrecht (UMC)/Princess Máxima Center (PMC) or Memorial Sloan Kettering Cancer Center (MSK) were included. Primary outcomes were nonrelapse mortality (NRM) and overall survival (OS), stratified for aGVHD and CD4+ IR, defined as ≥50 CD4+ T cells per μL within 100 days after HCT or before aGVHD onset. Multivariate and time-to-event Cox proportional hazards models were applied, and 591 patients (UMC/PMC, n = 276; MSK, n = 315) were included. NRM in patients with grade 3 to 4 aGVHD with or without CD4+ IR within 100 days after HCT was 30% vs 80% (P = .02) at UMC/PMC and 5% vs 67% (P = .02) at MSK. This was associated with lower OS without CD4+ IR (UMC/PMC, 61% vs 20%; P = .04; MSK, 75% vs 33%; P = .12). Inadequate CD4+ IR before aGVHD onset was associated with significantly higher NRM (74% vs 12%; P < .001) and inferior OS (24% vs 78%; P < .001). In this retrospective analysis, we demonstrate that early CD4+ IR, a simple and robust marker predictive of outcomes after HCT, is associated with survival after moderate to severe aGVHD. This association must be confirmed prospectively but suggests strategies to improve T-cell recovery after HCT may influence survival in patients developing aGVHD., (© 2021 by The American Society of Hematology.)
- Published
- 2021
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45. Optimal utility and probability functions for agents with finite computational precision.
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Juechems K, Balaguer J, Spitzer B, and Summerfield C
- Abstract
When making economic choices, such as those between goods or gambles, humans act as if their internal representation of the value and probability of a prospect is distorted away from its true value. These distortions give rise to decisions which apparently fail to maximize reward, and preferences that reverse without reason. Why would humans have evolved to encode value and probability in a distorted fashion, in the face of selective pressure for reward-maximizing choices? Here, we show that under the simple assumption that humans make decisions with finite computational precision--in other words, that decisions are irreducibly corrupted by noise--the distortions of value and probability displayed by humans are approximately optimal in that they maximize reward and minimize uncertainty. In two empirical studies, we manipulate factors that change the reward-maximizing form of distortion, and find that in each case, humans adapt optimally to the manipulation. This work suggests an answer to the longstanding question of why humans make "irrational" economic choices., Competing Interests: The authors declare no competing interest.
- Published
- 2021
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46. Interplay between chromosomal alterations and gene mutations shapes the evolutionary trajectory of clonal hematopoiesis.
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Gao T, Ptashkin R, Bolton KL, Sirenko M, Fong C, Spitzer B, Menghrajani K, Ossa JEA, Zhou Y, Bernard E, Levine M, Martinez JSM, Zhang Y, Franch-Expósito S, Patel M, Braunstein LZ, Kelly D, Yabe M, Benayed R, Caltabellotta NM, Philip J, Paraiso E, Mantha S, Solit DB, Diaz LA Jr, Berger MF, Klimek V, Levine RL, Zehir A, Devlin SM, and Papaemmanuil E
- Subjects
- Adult, Aged, Aged, 80 and over, Cohort Studies, Hematologic Neoplasms genetics, Humans, Middle Aged, Mosaicism, Neoplasms genetics, Risk Assessment, Selection, Genetic, Young Adult, Chromosome Aberrations, Clonal Evolution genetics, Clonal Hematopoiesis genetics, Mutation genetics
- Abstract
Stably acquired mutations in hematopoietic cells represent substrates of selection that may lead to clonal hematopoiesis (CH), a common state in cancer patients that is associated with a heightened risk of leukemia development. Owing to technical and sample size limitations, most CH studies have characterized gene mutations or mosaic chromosomal alterations (mCAs) individually. Here we leverage peripheral blood sequencing data from 32,442 cancer patients to jointly characterize gene mutations (n = 14,789) and mCAs (n = 383) in CH. Recurrent composite genotypes resembling known genetic interactions in leukemia genomes underlie 23% of all detected autosomal alterations, indicating that these selection mechanisms are operative early in clonal evolution. CH with composite genotypes defines a patient group at high risk of leukemia progression (3-year cumulative incidence 14.6%, CI: 7-22%). Multivariable analysis identifies mCA as an independent risk factor for leukemia development (HR = 14, 95% CI: 6-33, P < 0.001). Our results suggest that mCA should be considered in conjunction with gene mutations in the surveillance of patients at risk of hematologic neoplasms.
- Published
- 2021
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47. Cancer therapy shapes the fitness landscape of clonal hematopoiesis.
- Author
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Bolton KL, Ptashkin RN, Gao T, Braunstein L, Devlin SM, Kelly D, Patel M, Berthon A, Syed A, Yabe M, Coombs CC, Caltabellotta NM, Walsh M, Offit K, Stadler Z, Mandelker D, Schulman J, Patel A, Philip J, Bernard E, Gundem G, Ossa JEA, Levine M, Martinez JSM, Farnoud N, Glodzik D, Li S, Robson ME, Lee C, Pharoah PDP, Stopsack KH, Spitzer B, Mantha S, Fagin J, Boucai L, Gibson CJ, Ebert BL, Young AL, Druley T, Takahashi K, Gillis N, Ball M, Padron E, Hyman DM, Baselga J, Norton L, Gardos S, Klimek VM, Scher H, Bajorin D, Paraiso E, Benayed R, Arcila ME, Ladanyi M, Solit DB, Berger MF, Tallman M, Garcia-Closas M, Chatterjee N, Diaz LA Jr, Levine RL, Morton LM, Zehir A, and Papaemmanuil E
- Subjects
- Adolescent, Adult, Aged, Aged, 80 and over, Antineoplastic Agents pharmacology, Cell Transformation, Neoplastic drug effects, Cell Transformation, Neoplastic genetics, Cell Transformation, Neoplastic radiation effects, Child, Child, Preschool, Clonal Evolution, Clonal Hematopoiesis drug effects, Cohort Studies, Female, Genetic Fitness, Humans, Infant, Infant, Newborn, Leukemia, Myeloid genetics, Male, Middle Aged, Models, Biological, Mutation, Neoplasms drug therapy, Neoplasms radiotherapy, Selection, Genetic, Young Adult, Clonal Hematopoiesis genetics, Neoplasms, Second Primary genetics
- Abstract
Acquired mutations are pervasive across normal tissues. However, understanding of the processes that drive transformation of certain clones to cancer is limited. Here we study this phenomenon in the context of clonal hematopoiesis (CH) and the development of therapy-related myeloid neoplasms (tMNs). We find that mutations are selected differentially based on exposures. Mutations in ASXL1 are enriched in current or former smokers, whereas cancer therapy with radiation, platinum and topoisomerase II inhibitors preferentially selects for mutations in DNA damage response genes (TP53, PPM1D, CHEK2). Sequential sampling provides definitive evidence that DNA damage response clones outcompete other clones when exposed to certain therapies. Among cases in which CH was previously detected, the CH mutation was present at tMN diagnosis. We identify the molecular characteristics of CH that increase risk of tMN. The increasing implementation of clinical sequencing at diagnosis provides an opportunity to identify patients at risk of tMN for prevention strategies.
- Published
- 2020
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48. Low toxicity and favorable overall survival in relapsed/refractory B-ALL following CAR T cells and CD34-selected T-cell depleted allogeneic hematopoietic cell transplant.
- Author
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Fabrizio VA, Kernan NA, Boulad F, Cancio M, Allen J, Higman M, Margossian SP, Mauguen A, Prockop S, Scaradavou A, Shah N, Spitzer B, Stieglitz E, Yeager N, O'Reilly RJ, Brentjens RJ, Jan Boelens J, and Curran KJ
- Subjects
- Child, Humans, Immunotherapy, Adoptive, Infant, Neoplasm Recurrence, Local, Retrospective Studies, T-Lymphocytes, Young Adult, Graft vs Host Disease, Hematopoietic Stem Cell Transplantation
- Abstract
To define the tolerability and outcome of allogeneic hematopoietic stem cell transplant (allo-HSCT) following CAR T-cell therapy, we retrospectively reviewed pediatric/young adult patients with relapsed/refractory B-ALL who underwent this treatment. Fifteen patients (median age 13 years; range 1-20 years) with a median potential follow-up of 39 months demonstrated 24-month cumulative incidence of relapse, cumulative incidence of TRM, and OS of 16% (95% CI: 0-37%), 20% (95% CI: 0-40%), and 80% (95% CI: 60-100%), respectively. Severe toxicity following CAR T cells did not impact OS (p = 0.27), while greater time from CAR T cells to allo-HSCT (>80 days) was associated with a decrease in OS. In comparing CD34-selected T-cell depleted (TCD; n = 9) vs unmodified (n = 6) allo-HSCT, the cumulative incidence of relapse, TRM, and OS at 24 months was 22% (95% CI: 0-49%) vs 0% (p = 0.14), 0% vs 50% [95% CI: 10-90%] (p = 0.02) and 100% vs 50% [95% CI: 10-90%] (p = 0.02). In this small cohort of patients, CAR T cells followed by a CD34-selected TCD allo-HSCT appears to result in less TRM and favorable OS when compared with unmodified allo-HSCT. There was no evidence that disease control was impacted by the type of consolidative allo-HSCT, which demonstrates the feasibility of this approach.
- Published
- 2020
- Full Text
- View/download PDF
49. Early CD4+ T cell reconstitution as predictor of outcomes after allogeneic hematopoietic cell transplantation.
- Author
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van Roessel I, Prockop S, Klein E, Boulad F, Scaradavou A, Spitzer B, Kung A, Curran K, O'Reilly RJ, Kernan NA, Cancio M, and Boelens JJ
- Subjects
- Adolescent, Child, Child, Preschool, Cohort Studies, Disease-Free Survival, Female, Graft vs Host Disease immunology, Humans, Male, Multivariate Analysis, Proportional Hazards Models, Retrospective Studies, Transplantation, Homologous, Treatment Outcome, CD4-Positive T-Lymphocytes immunology, Hematopoietic Stem Cell Transplantation, Immune Reconstitution
- Abstract
Background: An association between early CD4+ T cell immune reconstitution (CD4+ IR) and survival after T-replete allogeneic hematopoietic cell transplantation (HCT) has been previously reported. Here we report validation of this relationship in a separate cohort that included recipients of ex vivo T-cell-depleted (TCD) HCT. We studied the relationship between CD4+ IR and clinical outcomes., Methods: A retrospective analysis of children/young adults receiving their first allogeneic HCT for any indication between January 2008 and December 2017 was performed. We related early CD4+ IR (defined as achieving >50 CD4+ T cells/µL on two consecutive measures within 100 days of HCT) to overall survival (OS), relapse, non-relapse mortality (NRM), event-free survival (EFS) and acute graft-versus-host disease (aGVHD). Fine and Gray competing risk models and Cox proportional hazard models were used., Results: In this analysis, 315 patients with a median age of 10.4 years (interquartile range 5.0-16.5 years) were included. The cumulative incidence of CD4+ IR at 100 days was 66.7% in the entire cohort, 54.7% in TCD (N = 208, hazard ratio [HR] 0.47, P < 0.001), 90.0% in uCB (N = 40) and 89.6% in T-replete (N = 47) HCT recipients. In multi-variate analyses, not achieving early CD4+ IR was a predictor of inferior OS (HR 2.35, 95% confidence interval [CI] 1.46-3.79, P < 0.001) and EFS (HR 1.80, 95% CI 1.20-2.69, P = 0.004) and increased NRM (HR 6.58, 95% CI 2.82-15.38, P < 0.001). No impact of CD4+ IR on relapse or aGVHD was found. Within the TCD group, similar associations were observed., Conclusion: In this HCT cohort, including recipients of TCD HCT, we confirmed that early CD4+ IR was an excellent predictor of outcomes. Finding strategies to predict or improve CD4+ IR may influence outcomes., (Copyright © 2020 International Society for Cell and Gene Therapy. Published by Elsevier Inc. All rights reserved.)
- Published
- 2020
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50. Selective Integration during Sequential Sampling in Posterior Neural Signals.
- Author
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Luyckx F, Spitzer B, Blangero A, Tsetsos K, and Summerfield C
- Subjects
- Adult, Choice Behavior, Electroencephalography, Female, Humans, Male, Cerebral Cortex physiology, Models, Neurological
- Abstract
Decisions are typically made after integrating information about multiple attributes of alternatives in a choice set. Where observers are obliged to consider attributes in turn, a computational framework known as "selective integration" can capture salient biases in human choices. The model proposes that successive attributes compete for processing resources and integration is biased towards the alternative with the locally preferred attribute. Quantitative analysis shows that this model, although it discards choice-relevant information, is optimal when the observers' decisions are corrupted by noise that occurs beyond the sensory stage. Here, we used electroencephalography (EEG) to test a neural prediction of the model: that locally preferred attributes should be encoded with higher gain in neural signals over the posterior cortex. Over two sessions, human observers judged which of the two simultaneous streams of bars had the higher (or lower) average height. The selective integration model fits the data better than a rival model without bias. Single-trial analysis showed that neural signals contralateral to the preferred attribute covaried more steeply with the decision information conferred by locally preferred attributes. These findings provide neural evidence in support of selective integration, complementing existing behavioral work., (© The Author(s) 2020. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permission@oup.com.)
- Published
- 2020
- Full Text
- View/download PDF
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