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  • 1
    In: Blood, American Society of Hematology, Vol. 138, No. Supplement 1 ( 2021-11-05), p. 2528-2528
    Abstract: Introduction: Post-transplant lymphoproliferative disorder (PTLD) is a rare and often aggressive disease in the setting of immunosuppression following solid organ transplant (SOT). Epstein-Barr virus (EBV) infection of B cells is responsible for about 50% of cases, either due to reactivation of the virus after transplantation or primary EBV infection. Although there is no approved therapy for patients (pts) with PTLD, guidelines include reduction of immunosuppression (RIS) as a part of initial treatment and may be sufficient for pts with early lesions. Rituximab, either as monotherapy or in combination with chemotherapy (CT), is used in addition to RIS as initial treatment. Pts with EBV + PTLD following SOT who fail rituximab plus CT have poor outcomes with limited treatment options. There are ongoing clinical studies investigating innovative therapies to address unmet needs in these pts. Published data on clinical outcomes of these pts remain limited and not well documented. We aimed to characterize the outcomes for pts diagnosed with EBV + PTLD following SOT who fail initial rituximab plus CT in a multi-national real-world setting. Methods: We conducted a large multinational, multicenter, retrospective chart review study of pts with EBV + PTLD following allogeneic hematopoietic cell transplantation (HCT) or SOT who received rituximab or rituximab plus CT between January 2000‒December 2018 and were refractory (failed to achieve complete response [CR] or partial response [PR] ) or relapsed at any point after such therapy. Treatment response was assessed either by clinical diagnosis, radiographic/imaging, biopsy/cytology, or a combination of such assessments. Data were collected from 29 centers across North America (United States and Canada) and the European Union. Study population was aligned to the ongoing investigational trial (Clinicaltrials.gov Identifier: NCT03394365). This analysis includes pts with EBV + PTLD following SOT who were refractory/relapsed to rituximab plus CT. The Kaplan-Meier method was utilized to estimate the overall survival (OS). Results: A total of 86 pts with EBV + PTLD following SOT who failed rituximab plus CT were included in the analysis; 65 (75.6%) pts were refractory while 21 (24.4%) relapsed after initial response of CR or PR. Median age at PTLD diagnosis was 43 years (range 1‒78) and median time to PTLD onset from transplant was 1.7 years (range 0.1‒27.9). Median follow up time was 12.9 months from the date of PTLD diagnosis. PTLD histological subtypes were 66 (76.7%) monomorphic, 18 (20.9%) polymorphic, and 2 (2.3%) early lesions. The most common PTLD subtype was diffuse large B-cell lymphoma (DLBCL) (58, 67.4%). Of the 86 pts, 49 (57%) received CT following rituximab monotherapy while 37 (43%) pts received CT concurrently with rituximab. Overall, 63 (73.3%) pts died. PTLD-specific mortality was observed in 41 (65.1%) pts, treatment-related mortality in 10 (15.9%) pts, mortality due to organ rejection/failure in 2 (3.2%) pts, mortality due to other causes in 7 (11.1%) pts, and mortality due to unknown causes in 3 (4.8%) pts. Median OS was 15.5 months (95% confidence interval [CI]: 8.3‒22.9) from PTLD diagnosis, and was 4.1 months (95%CI: 1.9‒8.5) from the earliest date when pts became refractory or relapsed following rituximab plus CT. Conclusions: The prognosis for pts with EBV + PTLD following SOT who fail rituximab plus CT remains poor, with an estimated median OS of about 4 months and a majority of pts dying from PTLD and related treatment. In this specific population, there remains a significant unmet medical need for effective and well-tolerated therapies. Figure 1 Figure 1. Disclosures Dharnidharka: Merck, Pfizer, Medronic, Cardinal Health: Current holder of stock options in a privately-held company; CareDx: Honoraria, Research Funding; Atara Bio, MedinCell: Consultancy. Thirumalai: Atara Biotherapeutics: Current Employment. Jaeger: Roche: Honoraria, Membership on an entity's Board of Directors or advisory committees; Janssen: Honoraria, Membership on an entity's Board of Directors or advisory committees; Gilead: Honoraria, Membership on an entity's Board of Directors or advisory committees; Norvartis: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; BMS/Celgene: Honoraria, Membership on an entity's Board of Directors or advisory committees. Zhao: Atara Biotherapeutics: Current Employment. Dierickx: Roche: Consultancy, Research Funding; Novartis: Consultancy; Sanofi: Consultancy; Sandoz: Consultancy; Takeda, Incyte, Atara: Consultancy. Xun: Atara Biotherapeutics: Current Employment. Sawas: Flat Iron Health: Current Employment; Roche: Current holder of stock options in a privately-held company; Seattle Genetics, Acrotech: Consultancy; Daiichi-Sankyo, Seattle Genetics, Gilead: Other: Travel, accommodation, expenses, Speakers Bureau; Affimed, Trillium: Research Funding. Sadetsky: Atara Biotherapeutics: Current Employment. Barlev: Atara Biotherapeutics: Current Employment. Zimmermann: Roche, Atara: Research Funding; Celgene, Roche, Atara, Jansen: Other: Travel accomodations. Trappe: Celgene: Other: Travel support; Roche: Other: Travel support; Atara Biotherapeutics: Consultancy, Other: Travel support, Research Funding; Jansen: Other: Travel support; GSK: Other: Travel support; AbbVie: Other: Travel support.
    Type of Medium: Online Resource
    ISSN: 0006-4971 , 1528-0020
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    Language: English
    Publisher: American Society of Hematology
    Publication Date: 2021
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  • 2
    In: Transplantation and Cellular Therapy, Elsevier BV, Vol. 28, No. 3 ( 2022-03), p. S221-S222
    Type of Medium: Online Resource
    ISSN: 2666-6367
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    detail.hit.zdb_id: 3056525-X
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  • 3
    Online Resource
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    American Society of Hematology ; 2021
    In:  Blood Vol. 138, No. Supplement 1 ( 2021-11-05), p. 4564-4564
    In: Blood, American Society of Hematology, Vol. 138, No. Supplement 1 ( 2021-11-05), p. 4564-4564
    Abstract: Introduction: Post-transplant lymphoproliferative disease (PTLD) is an ultra-rare lymphoma following allogeneic hematopoietic stem cell transplant (HCT) or solid organ transplant (SOT). Incidence of PTLD varies over time after transplant with majority of cases occurring within the first year (yr) after HCT (Garcia-Cadenas, Eur J Haematol. 2019). In the SOT setting, PTLD can occur up to 30 yrs post-transplant and is largely dependent on the transplanted organ, the type and degree of immunosuppression, and transplant recipient characteristics (Dierickx, N Eng J Med. 2018; Trappe, J Clin Oncol. 2017). Published literature reports wide ranges of epidemiological estimates due to variation in the follow-up time, transplant type and sample size. We conducted a systematic literature review (SLR) to summarize the incidence of PTLD to better understand the reasons for such variation. Methods: A SLR on the burden of PTLD was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines with the scope defined in terms of Population, Intervention Comparators, Outcomes and Study design (PICOS) criteria. Pertinent literature on epidemiology of PTLD published between January 2010 to February 2020 and relevant conference abstracts published between January 2018 to February 2020 were identified. Comprehensive literature searches were performed using the Ovid platform to identify articles indexed in PubMed, Embase, PsycINFO, and the National Health Service Economic Evaluation Database. Study designs were limited to population/registry-based studies, observational cohort studies (prospective/retrospective), and cross-sectional studies. Studies reporting incidence of PTLD were limited to those with at least 1000 total transplant recipients. All titles and abstracts were reviewed by two independent researchers with any discrepancies resolved by a third researcher. Incidence estimates were calculated by data extractors when it was not directly reported in the literature. Results: A total of 177 studies reporting epidemiological data on PTLD were identified using pre-specified SLR criteria. Most of the studies (n=150) were retrospective in design. Incidence was reported in 114 studies. Majority of the studies reported cumulative incidence (CI) over specified times such as 5-yr or 10-yr incidence or proportion of patients (pts) with PTLD out of a sample of transplanted pts. In the HCT setting, only CI was reported; twelve studies reported CI ranging from 0.1% among 15094 pts receiving autologous HCT over a 19-yr period to 4% in a cohort of 1021 pts receiving allogeneic HCT over a 16-yr period. A total of 100 studies reported incidence of PTLD in SOT pts which was highly influenced by the study population, EBV status at the time of transplant and follow-up time. Of these, 12 reported incidence rates ranging from 24 EBV negative PTLD cases per 100,000 person-years (PY) within 1-5 yrs post-transplant to 3460 PTLD cases per 100,000 PY at 20 yrs post-transplant. Eighty studies reported CI, 19 of which reported CI for various timepoints. In a group of 23171 heart transplant pts CI was 1% during a median follow-up of 4.3 yrs, while in a subgroup of four pediatric multi-organ transplant recipients followed from 2003 to 2011 CI was 25%. Across studies, CI at 1-yr post-transplant ranged from 0.1% to 4.9% and 5-yr CI ranged from 0.7% to 12.1% in select group of transplant pts. Twenty-four studies reported CI by transplant organ type ranging from 0.2% in kidney transplant pts within the first year to 12.1% in lung transplant pts over 7.5 yrs, with higher estimates reported in studies with smaller sample sizes. Conclusions: Our SLR shows large variation in the reported incidence of PTLD due to heterogeneity in the methodology and the study populations in both HCT and SOT settings. Published literature lacks the granularity to correctly interpret the incidence of PTLD in the general transplant population. Thus, additional methods and data considerations such as population type (HCT/SOT transplants, adult/pediatric pts, etc.), representativeness (single institutional data/multi-center/country level registry), unit of measurement of risk (CI/incidence rate, etc.), type of study (retrospective/prospective), length of follow-up, sample size, trends in transplant and treatment landscape over time are needed to ensure accuracy in the estimation of incidence of PTLD. Disclosures Thirumalai: Atara Biotherapeutics: Current Employment. Watson: Atara Biotherapeutics: Current Employment, Current holder of individual stocks in a privately-held company. Xun: Atara Biotherapeutics: Current Employment. Sadetsky: Atara Biotherapeutics: Current Employment. Schaible: Evidera: Current Employment. Barlev: Atara Biotherapeutics: Current Employment.
    Type of Medium: Online Resource
    ISSN: 0006-4971 , 1528-0020
    RVK:
    RVK:
    Language: English
    Publisher: American Society of Hematology
    Publication Date: 2021
    detail.hit.zdb_id: 1468538-3
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  • 4
    In: Blood, American Society of Hematology, Vol. 134, No. Supplement_1 ( 2019-11-13), p. 65-65
    Abstract: Background: Post-transplant lymphoproliferative disorder (PTLD) is a rare and often aggressive disease in the setting of immunosuppression following solid organ transplant (post-SOT). About 50% of cases are associated with Epstein-Barr virus (EBV) infection of B cells, either due to reactivation of the virus after transplantation, or from primary EBV infection. Data remain very limited with respect to overall clinical and economic burden among EBV+PTLD patients (pts), particularly in the setting of pts who fail first line therapy. This retrospective chart review aimed to quantify the burden of hospitalization due to EBV+PTLD in post-SOT pts who failed first-line therapy in the real-world setting in Germany. Study Design and Methods: The German PTLD registry database was screened for pts with EBV+PTLD post-SOT who were refractory (failed to achieve complete [CR] or partial remission [PR] ) to rituximab or rituximab plus chemotherapy (CT) or relapsed at any point after such therapy between 2000 to 2015. Pts with primary CNS PTLD were excluded. Pts without any outpatient visit or hospitalization record were excluded from the analysis (n of pts=1). Hospitalization data were reviewed by an experienced physician and adjudicated as PTLD relevant; details on diagnoses and procedures performed during hospitalization were collected from the first diagnosis of PTLD to the earliest of the following: death, loss to follow up or end of study period (Sep 1st, 2018). We estimated the mean number of hospitalizations, average length of inpatient stay per admission and the percentages of time spent in the hospital out of the total time following PTLD index date or treatment failure index date. The PTLD index date was defined as the first date of EBV+PTLD diagnosis; and the treatment failure index date was defined as the earliest date of pts who became refractory or relapsed to first-line therapy of rituximab or rituximab plus CT. Results: A total of 35 EBV+PTLD pts were analyzed. All had failed first line rituximab monotherapy. Median follow up time was 24.8 months from the PTLD index date. Median age at PTLD diagnosis was 47 years (range 18-75). Of these, 6 (17.1%) were polymorphic, 21 (60%) were diffuse large B cell lymphoma, 3 (8.6%) were Burkitt lymphoma, and 5 (14.3%) were other B-cell lymphoma. Among the 35 pts, 23 (65.7%) died: 12 from PTLD, 6 treatment-related, 1 from organ failure, and 4 from other causes. The vast majority of pts (29 out of 35) received CHOP-based CT following rituximab failure (2 other CT, 4 did not receive CT). All pts (100%) had at least one inpatient hospitalization after PTLD diagnosis and 16 (45.7%) pts had at least one ICU admission following PTLD index date. The mean number of PTLD hospitalizations following PTLD index date was 4 (SD 3.2, range 1-12) and the mean average length of stay per hospitalization was 23.8 days (SD 22.6, range 2-94). The mean proportion of time spent in the hospital out of total time at risk from PTLD index date was 20.5% (SD 27.6, range 0.1-100) with an average of 9.5% of time spent in the ICU setting during hospitalization stay (SD 22, range 0-99.5). The mean number of PTLD hospitalizations (n of pts=19) following first course CT failure index date was 2.1 (SD 1.9, range 0-7) and the mean average length of stay per hospitalization was 14.8 days (SD 8.6, range 6-31.6). The mean proportion of time spent in the hospital out of total time at risk from CT failure index date was 41.8% (SD 39.6, range 0-100) with an average of 26% time spent in the ICU setting (SD 39, range 0-100). Conclusions: This is the first study to quantify the hospitalization burden directly related to EBV+PTLD post-SOT in Germany. The results show that hospitalization burden in EBV+PTLD post-SOT pts failing first line rituximab monotherapy is substantial accounting for approximately 20% of patient's time after initial diagnosis of PTLD with around 10% spent in the ICU setting. This hospitalization burden is even higher and accounts for over 40% of time in pts after additional treatment failure to first CT with 26% spent in the ICU setting. Disclosures Zimmermann: Roche: Research Funding; Janssen: Other: Travel, accomodations expenses; Atara Biotherapeutics: Other: Travel, accomodations expenses, Research Funding; Celgene: Other: Travel, accomodations expenses. Xu:Atara Biotherapeutics: Employment, Equity Ownership. Barlev:Atara Biotherapeutics: Employment, Equity Ownership. Zhang:Atara Biotherapeutics: Employment, Equity Ownership. Thirumalai:Atara Biotherapeutics: Employment. Watson:Atara Biotherapeutics: Employment, Equity Ownership. Trappe:Atara Biotherapeutics: Consultancy, Membership on an entity's Board of Directors or advisory committees; Janssen: Other: Congress related travel support; Roche: Consultancy, Honoraria, Other: Congress related travel support, Research Funding; AbbVie: Consultancy, Other: Congress related travel support; Celgene: Other: Congress related travel support.
    Type of Medium: Online Resource
    ISSN: 0006-4971 , 1528-0020
    RVK:
    RVK:
    Language: English
    Publisher: American Society of Hematology
    Publication Date: 2019
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  • 5
    In: Advances in Therapy, Springer Science and Business Media LLC, Vol. 40, No. 3 ( 2023-03), p. 1267-1281
    Type of Medium: Online Resource
    ISSN: 0741-238X , 1865-8652
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2023
    detail.hit.zdb_id: 2421646-X
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  • 6
    In: Blood, American Society of Hematology, Vol. 138, No. Supplement 1 ( 2021-11-05), p. 1454-1454
    Abstract: Background: Post-transplant lymphoproliferative disease (PTLD) occurs following allogeneic hematopoietic stem cell transplantation (HCT) as a consequence of immunosuppression. In most cases following HCT, PTLD is associated with Epstein-Barr Virus (EBV) infection of B cells, either due to reactivation, or from primary EBV infection (Styczynski J, Haematol. 2016; Allen UD, Am J Transplant, 2019; Nijand M, Transplant Direct, 2016). Clinical practice treatment guidelines recommend rituximab as preemptive therapy for EBV reactivation (based on EBV virus load) and for treatment of EBV-driven (EBV +) PTLD following HCT. However, EBV + PTLD patients (pts) who fail rituximab have very poor outcomes with limited treatment options. There are ongoing clinical studies investigating innovative therapies to address unmet needs in these pts. Published evidence on the clinical outcomes of these pts who fail rituximab is also limited. We aimed to describe the outcomes for pts diagnosed with EBV + PTLD following HCT who fail rituximab in a multinational real-world setting. Methods: We conducted a large multinational, multicenter retrospective chart review study of EBV + PTLD pts following HCT or solid organ transplantation who received rituximab or rituximab plus chemotherapy (CT) between January 2000-December 2018 and were refractory (failed to achieve complete response [CR] or partial response [PR] ) or relapsed at any point after such therapy. Treatment response was assessed by either clinical diagnosis, radiographic/imaging, biopsy/cytology, or a combination of such assessments. Data was collected from 29 centers across North America (United States and Canada) and the European Union. The study population was aligned with the ongoing investigational trial (Clinicaltrials.gov Identifier: NCT03394365). This analysis includes pts with EBV + PTLD following HCT who were refractory or relapsed after rituximab ± CT as first line of therapy. The Kaplan-Meier (KM) method was used to estimate the overall survival (OS). Rituximab failure date was defined as the earliest date when pts became refractory or relapsed following rituximab ± CT. Results: A total of 81 pts with EBV + PTLD following HCT who failed rituximab ± CT were included in the analysis. Median age at PTLD diagnosis was 49 years (interquartile range [IQR]: 33‒57) and median time to PTLD onset from transplant was 3 months (IQR: 1.9‒4.2). Median follow-up time was 1.7 months (IQR: 0.6‒3.4) from the date of PTLD diagnosis. Of all the PTLDs, 52 (64.2%) were monomorphic, 18 (22.2%) polymorphic, 2 (2.5%) early lesions, and 9 (11.1%) were unknown. The most common PTLD subtype was diffuse large B-cell lymphoma (DLBCL) (46, 56.8%). Sixty-eight (84%) pts received rituximab monotherapy and 13 (16%) pts received rituximab plus CT as first line of therapy. Seven out of 13 pts who received rituximab plus CT had received preemptive rituximab treatment for EBV viremia prior to PTLD treatment. Median OS was 0.7 months (95% CI: 0.3‒1; IQR: 0.1‒2.7) for 81 pts who failed first line rituximab ± CT (Figure 1). Median OS from PTLD diagnosis was 1.7 months (95% CI: 1.1‒2.3; IQR: 0.6‒3.4). Seventy-four (91.4%) out of the 81 pts ultimately died. Causes of death comprised 50 (67.6%) related to PTLD and therapy, 10 (13.5%) graft-versus-host disease (GvHD), 5 (6.8%) from sepsis/infection, 3 (4.1%) due to primary disease leading to HCT, 2 (2.7%) organ failure, 1 (1.4%) graft failure, 1 (1.4%) from hepatic failure, and 2 (2.7%) unknown. Conclusions: The prognosis of EBV + PTLD pts following HCT who fail rituximab ± CT remains very poor with an estimated median OS of less than 1 month, highlighting the significant unmet need in this population. Figure 1 Figure 1. Disclosures Storek: Atara Biotherapeutics: Other: Site PI, Research Funding. Socié: Alexion: Research Funding. Thirumalai: Atara Biotherapeutics: Current Employment. Guzman-Becerra: Atara Biotherapeutics: Current Employment. Xun: Atara Biotherapeutics: Current Employment. Kumar: Roche: Research Funding; GSK: Research Funding; Amplyx: Research Funding; Merck: Research Funding; Takeda & Atara: Research Funding. Sadetsky: Atara Biotherapeutics: Current Employment. Dierickx: Sandoz: Consultancy; Sanofi: Consultancy; Novartis: Consultancy; Roche: Consultancy, Research Funding; Takeda, Incyte, Atara: Consultancy. Reitan: Atara, Kite, Janssen: Research Funding. Barlev: Atara Biotherapeutics: Current Employment. Mohty: Sanofi: Honoraria, Research Funding; Pfizer: Honoraria; Novartis: Honoraria; Takeda: Honoraria; Jazz: Honoraria, Research Funding; Janssen: Honoraria, Research Funding; Gilead: Honoraria; Celgene: Honoraria, Research Funding; Bristol Myers Squibb: Honoraria; Astellas: Honoraria; Amgen: Honoraria; Adaptive Biotechnologies: Honoraria.
    Type of Medium: Online Resource
    ISSN: 0006-4971 , 1528-0020
    RVK:
    RVK:
    Language: English
    Publisher: American Society of Hematology
    Publication Date: 2021
    detail.hit.zdb_id: 1468538-3
    detail.hit.zdb_id: 80069-7
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  • 7
    In: Neurology and Therapy, Springer Science and Business Media LLC
    Type of Medium: Online Resource
    ISSN: 2193-8253 , 2193-6536
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2023
    detail.hit.zdb_id: 2682228-3
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