Browsing by Author "Parikh, SH"

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    A novel reduced-intensity conditioning regimen for unrelated umbilical cord blood transplantation in children with nonmalignant diseases
    (Biology of Blood and Marrow Transplantation, 2014) Parikh, SH; Mendizabal, A; Benjamin, CL; Komanduri, KV; Antony, J; Petrovic, A; Hale, G; Driscoll, TA; Martin, PL; Page, KM; Flickinger, K; Moffet, J; Niedzwiecki, D; Kurtzberg, J; Szabolcs, P
    Reduced-intensity conditioning (RIC) regimens have the potential to decrease transplantation-related morbidity and mortality. However, engraftment failure has been prohibitively high after RIC unrelated umbilical cord blood transplantation (UCBT) in chemotherapy-naïve children with nonmalignant diseases (NMD). Twenty-two children with a median age of 2.8years, many with severe comorbidities and prior viral infections, were enrolled in a novel RIC protocol consisting of hydroxyurea, alemtuzumab, fludarabine, melphalan, and thiotepa followed by single UCBT. Patients underwent transplantation for inherited metabolic disorders (n=8), primary immunodeficiencies (n=9), hemoglobinopathies (n=4) and Diamond Blackfan anemia (n=1). Most umbilical cord blood (UCB) units were HLA-mismatched with median infused total nucleated cell dose of 7.9× 107/kg. No serious organ toxicities were attributable to the regimen. The cumulative incidence of neutrophil engraftment was 86.4% (95% confidence interval [CI], 65% to 100%) in a median of 20days, with the majority sustaining>95% donor chimerism at 1year. Cumulative incidence of acute graft-versus-host disease (GVHD) grades II to IV and III to IV by day 180 was 27.3% (95% CI, 8.7% to 45.9%) and 13.6% (95 CI, 0% to 27.6%), respectively. Cumulative incidence of extensive chronic GVHD was 9.1% (95% CI, 0% to 20.8%). The primary causes of death were viral infections (n=3), acute GVHD (n=1) and transfusion reaction (n=1). One-year overall and event-free survivals were 77.3% (95% CI, 53.7% to 89.8%) and 68.2% (95% CI, 44.6% to 83.4%) with 31months median follow-up. This is the first RIC protocol demonstrating durable UCB engraftment in children with NMD. Future risk-based modifications of this regimen could decrease the incidence of viral infections. (www.clinicaltrials.gov/NCT00744692). © 2014 American Society for Blood and Marrow Transplantation.
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    Durable Chimerism and Long-Term Survival Following Unrelated Umbilical Cord Blood Transplantation for Pediatric Hemophagocytic Lymphohistiocytosis: a Single Center Experience
    (Biology of Blood and Marrow Transplantation, 2017-10) Patel, SA; allewelt, HA; Troy, JD; Martin, PL; Driscoll, TA; Prasad, VK; Kurtzberg, J; Page, KM; Parikh, SH
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    Pre-engraftment syndrome after myeloablative dual umbilical cord blood transplantation: risk factors and response to treatment.
    (Bone marrow transplantation, 2013-07) Kanda, J; Kaynar, L; Kanda, Y; Prasad, VK; Parikh, SH; Lan, L; Shen, T; Rizzieri, DA; Long, GD; Sullivan, KM; Gasparetto, C; Chute, JP; Morris, A; Winkel, S; McPherson, J; Kurtzberg, J; Chao, NJ; Horwitz, ME
    High fevers and/or rashes prior to neutrophil engraftment are frequently observed after umbilical cord blood (UCB) transplantation, and the condition is referred to as pre-engraftment syndrome (PES). Few studies have evaluated the risk factors for and treatment response to PES. Therefore, we retrospectively characterized PES in 57 consecutive engrafted patients (≥ 12 years old) who received myeloablative dual UCB transplantation. All patients received TBI (≥ 13.2 Gy)-based myeloablative conditioning. Tacrolimus (n=35) or CYA (n=22) combined with mycophenolate mofetil was used as GVHD prophylaxis. PES was defined as the presence of non-infectious fever (≥ 38.5 °C) and/or rash prior to or on the day of neutrophil engraftment. The incidence (95% confidence interval) of PES was 77% (66-88%). The incidence of PES was significantly higher in patients who received CYA as a GVHD prophylaxis than those who received tacrolimus (P<0.001), and this association was confirmed in the multivariate analysis. The occurrence of PES did not impact OS or tumor relapse, although it may have increased non-relapse mortality (P=0.071). The incidence of acute GHVD or treatment-related mortality was not influenced by the choice to use corticosteroids to treat PES. This study suggests that use of CYA for GVHD prophylaxis increases the risk of PES following dual UCB transplantation.