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Hematopoietic Cell Transplantation in Young Adult Acute Lymphoblastic Leukemia: A United States Population-Level Analysis.

ABSTRACT: In this population-based evaluation of adolescents and young adults (AYA) acute lymphoblastic leukemia (ALL), we describe patterns of care (POC) and outcomes regarding hematopoietic cell transplantation (HCT) in first complete remission (CR1). Data were abstracted from the 2013 United States Surveillance, Epidemiology, and End Results POC study; newly diagnosed AYA ALL were included. Multivariable logistic regression evaluated associations with HCT in CR1; Cox proportional hazards regression evaluated survival associations. Of 399 AYAs with ALL included, 102 (28.5%) underwent HCT in CR1. High-risk cytogenetics (odds ratio [OR]?=?4.86, 95% confidence interval [CI]?=?3.02-7.83) and hyper-cyclophosphamide, vincristine, adriamycin, and dexamethasone (CVAD) induction (OR?=?1.84, 95% CI?=?1.07-3.16) were associated with HCT in CR1. Two-year cumulative incidence of relapse, relapse-free survival (RFS), and overall survival (OS) of the entire cohort were 28.3% (95% CI?=?23.4-33.4), 69.3% (95% CI?=?63.6-74.3%), and 84.1% (95% CI?=?79.7-87.5), respectively. Two-year RFS was significantly higher in patients receiving CR1 HCT relative to chemotherapy (83.6%, 95% CI?=?72.6-90.5% vs. 64.3%, 95% CI?=?57.5-70.3), but no difference was seen in 2-year OS (88.9%, 95% CI?=?80.8-93.7 vs. 82.5%, 95% CI?=?77.2-86.7). Treatment at a nonteaching hospital was independently associated with inferior OS (hazard ratio?=?2.15, 95% CI?=?1.23-3.76). Although the ALL landscape is changing, these data provide a snapshot of the use and outcomes of HCT for AYA ALL across the United States.

SUBMITTER: Muffly L

PROVIDER: S-EPMC6588119 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature

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Project description:Young adult (YA) survivors of allogeneic hematopoietic cell transplantation (HCT) are at risk for late psychosocial challenges, including the inability to return to work post-HCT. Work-related outcomes in this population remain understudied, however. We conducted this study to assess the post-HCT work status of survivors of allogeneic HCT who underwent HCT as YAs and to analyze the patient-, disease-, and HCT-related factors associated with their work status at 1 year post-HCT. Using Center for International Blood and Marrow Transplant Research data, we evaluated the post-HCT work status (full-time, part-time work, unemployed, or medical disability) of 1365 YA HCT survivors who underwent HCT between 2008 and 2015. Percentages of work status categories were reported at 4 time points: 6 months, 1 year, 2 years, and 3 years post-HCT. Percentages of post-HCT work status categories at the 1-year time point were also described in relation to survivors' pre-HCT work status categories. Factors associated with 1-year post-HCT work status (full-time or part-time work) were examined using logistic regression. From 6 months to 3 years post-HCT, the percentage of survivors working full-time increased from 18.3% to 50.7% and the percentage working part-time increased from 6.9% to 10.5%. Of patients in full-time work pre-HCT, 50% were unemployed or on medical disability at 1 year post-HCT. Female sex (odds ratio [OR], 0.55; 95% confidence interval [CI], 0.40 to 0.77), HCT Comorbidity Index score ≥3 (OR, 0.57; 95% CI, 0.39 to 0.82), pre-HCT unemployment (OR, 0.37; 95% CI, 0.24 to 0.56), medical disability (OR, 0.44; 95% CI, 0.28 to 0.70), development of grade III-IV acute graft-versus-host disease (OR, 0.52; 95% CI, 0.34 to 0.80), and relapse within 1 year post-HCT (OR, 0.34; 95% CI, 0.21 to 0.56) were associated with a lower likelihood of employment at 1 year post-HCT. Compared with myeloablative conditioning (MAC) with total body irradiation (TBI), MAC without TBI (OR, 1.71; 95% CI, 1.16 to 2.53) was associated with a greater likelihood of employment at 1 year post-HCT. Graduate school-level education (OR, 2.47; 95% CI, 1.49 to 4.10) was also associated with a greater likelihood of employment at 1 year post-HCT. Although the work status among YA HCT survivors continued to improve over time, a substantial subset became or remained unemployed or on medical disability. These findings underscore the need for effective interventions to support return to work in this population.

Project description:BackgroundTreatment on risk adapted intensive pediatric protocols has improved outcome for teenagers and young adults (TYA) with T-cell acute lymphoblastic leukemia (T-ALL). Understanding the biology of disease in this age group and the genetic basis of relapse is a key goal as patients with relapsed/refractory disease have poor outcomes with conventional chemotherapy and novel molecular targets are required. This study examines the question of whether TYA T-ALL has a specific biological-molecular profile distinct from pediatric or adult T-ALL.MethodsGenomic characterization was undertaken of a retrospective discovery cohort of 80 patients aged 15-26 years with primary or relapsed T-ALL, using a combination of Genome-Wide Human SNP Array 6.0, targeted gene mutation and promoter methylation analyses. Findings were confirmed by MLPA, real-time quantitative PCR, and FISH. Whole Exome Sequencing was performed in 4 patients with matched presentation and relapse to model clonal evolution. A prevalence analysis was performed on a final data set of 1,792 individual cases to identify genetic lesions with age specific frequency patterns, including 972 pediatric (1-14 years), 439 TYA (15-24 years) and 381 adult (≥25 years) cases. These cases were extracted from 19 publications with comparable genomic data identified through a PubMed search.ResultsGenomic characterization of this large cohort of TYA T-ALL patients identified recurrent isochromosome 7q i(7q) in our discovery cohort (n = 3). Prevalence analysis did not identify any age specific genetic abnormalities. Genomic analysis of 6 pairs of matched presentation - relapsed T-ALL established that all relapses were clonally related to the initial leukemia. Whole exome sequencing analysis revealed recurrent, targetable, mutations disrupting NOTCH, PI3K/AKT/mTOR, FLT3, NRAS as well as drug metabolism pathways.ConclusionsAll genetic aberrations in TYA T-ALL occurred with an incidence similar or intermediate to that reported in the pediatric and adult literature, demonstrating that overall TYA T-ALL exhibits a transitional genomic profile. Analysis of matched presentation - relapse supported the hypothesis that relapse is driven by the Darwinian evolution of sub-clones associated with drug resistance (NT5C2 and TP53 mutations) and re-iterative mutation of known key T-ALL drivers, including NOTCH1.

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Hematopoietic Cell Transplantation in Young Adult Acute Lymphoblastic Leukemia: A United States Population-Level Analysis.

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