Allogeneic hematopoietic cell transplantation with non-myeloablative conditioning for patients with hematologic malignancies: Improved outcomes over two decades.

We have used a non-myeloablative conditioning regimen for allogeneic hematopoietic cell transplantation for the past twenty years. During that period, changes in clinical practice have been aimed at reducing morbidity and mortality from infections, organ toxicity, and graft-versus-host disease. We hypothesized that improvements in clinical practice led to better transplantation outcomes over time. From 1997-2017, 1,720 patients with hematologic malignancies received low-dose total body irradiation +/- fludarabine or clofarabine before transplantation from HLA-matched sibling or unrelated donors, followed by mycophenolate mofetil and a calcineurin inhibitor ± sirolimus. We compared outcomes in three cohorts by year of transplantation: 1997 +/- 2003 (n=562), 2004 +/- 2009 (n=594), and 2010 +/- 2017 (n=564). The proportion of patients ≥60 years old increased from 27% in 1997 +/- 2003 to 56% in 2010-2017, and with scores from the Hematopoietic Cell Transplantation Comborbidity Index of ≥3 increased from 25% in 1997 +/- 2003 to 45% in 2010 +/- 2017. Use of unrelated donors increased from 34% in 1997 +/- 2003 to 65% in 2010-2017. When outcomes from 2004 +/- 2009 and 2010-2017 were compared to 1997 +/- 2003, improvements were noted in overall survival (P=.0001 for 2004-2009 and P <.0001 for 2010-2017), profression-free survival (P=.002 for 2004-2009 and P <.0001 for 2010 +/- 2017), non-relapse mortality (P<.0001 for 2004 +/- 2009 and P <.0001 for 2010 +/- 2017), and in rates of grades 2 +/- 4 acute and chronic graft-vs.-host disease. For patients with hematologic malignancies who underwent transplantation with non-myeloablative conditioning, outcomes have improved during the past two decades. Trials reported are registered under ClinicalTrials.gov identifiers: NCT00003145, NCT00003196, NCT00003954, NCT00005799, NCT00005801, NCT00005803, NCT00006251, NCT00014235, NCT00027820, NCT00031655, NCT00036738, NCT00045435, NCT00052546, NCT00060424, NCT00075478, NCT00078858, NCT00089011, NCT00104858, NCT00105001, NCT00110058, NCT00397813, NCT00793572, NCT01231412, NCT01252667, NCT01527045.

Health-related quality of life and physical functioning in patients participating in a rehabilitation programme, undergoing non-myeloablative allogeneic haematopoietic stem cell transplantation: Outcomes from a single arm longitudinal study.

OBJECTIVE: This study aims to report HRQOL, patient activation and physical functioning of haematological patients, participating in a 6-month multimodal interdisciplinary rehabilitation programme HAPPY, when undergoing non-myeloablative allogeneic haematopoietic stem cell transplantation (NMA-HSCT). METHODS: A prospective single-arm longitudinal design. Outcomes were collected as part of a feasibility study and included: HRQOL (EORTC QLQ-C30), patient activation measure (PAM), cardiorespiratory capacity (VO2peak ), leg extensor power, lean body mass, measured pre-NMA-HSCT at 3-, 6- and 12-month follow-up. RESULTS: Thirty (mean age (SD) 64.1 (6.5)) out of 34 patients participated and 18 completed HAPPY. Outcome measures showed large individual differences of decline and improvement during follow-up. Patients rated HRQOL as good (median 70.8; range 33.3-100). Fatigue, dyspnoea, insomnia and appetite loss mainly remained or worsened. PAM stayed in the upper half of range (median 55.6; range 20.5-84.8) with a trend towards improvement at 12-month follow-up. Physical functioning scores were low [i.e. baseline VO2peak , men median 1.5 L/min range (1.0-2.9), women 1.0 L/min (0.8-1.4), leg extensor power men 2.1 Watt/kg range (1.3-3.8), women 1.7 Watt/kg (1.3-2.4), lean body mass men 19.5% (17.6-24.9) and women 17.8% (15.3-21.7)]. CONCLUSION: The sustained low level of physical functioning and symptoms 12-month after NMA-HSCT emphasise the need for pre-rehabilitation and long-lasting rehabilitation support in this frail patient group.

Patients´ experiences and perspectives of challenges and needs related to nonmyeloablative stem cell transplantation: Involving patients in developing a targeted rehabilitation programme.

AIMS AND OBJECTIVES: To explore patients' experiences and perspectives of their challenges and needs regarding their return to everyday life after allogeneic nonmyeloablative haematopoietic stem cell transplantation (NMA-HSCT). BACKGROUND: NMA-HSCT can cure patients with malignant blood diseases, but during the following years, the majority of patients suffer from serious side effects and complications. Hence, it is a major challenge for patients treated with NMA-HSCT to rehabilitate, maintain physical and psychosocial functioning and return to a life in restored balance. DESIGN: The design was qualitative using the interpretive description methodology, and the theoretical framework symbolic interactionism inspired the interview guide and analysis. METHODS: Between April to May 2017, five focus group interviews were conducted with 15 outpatients in a haematological ward in Denmark. The patients were treated with NMA-HSCT 8-30 months prior to the interviews. The study adheres to the Consolidated Criteria for Reporting Qualitative Research guidelines. RESULTS: The impaired functioning was the overarching theme and seemed to be the trigger entailing rehabilitation needs related to the following main themes: realising decline, adapting to changes, the meaning of motivation and reliance on relations. These findings seemed to affect and influence the patients' struggle for a return to an everyday life like before being diagnosed or just before undergoing NMA-HSCT. CONCLUSION: This study adds to our understanding of important elements to consider when developing a targeted rehabilitation programme. RELEVANCE TO CLINICAL PRACTICE: Based on our findings, the rehabilitation programme should encompass: extensive variation regarding how to address the impaired functioning through individualised approaches, multimodal interventions, interventions through several months with varying intensity, an interdisciplinary team approach supporting motivation and visualisation of every progress by tangible goal setting, communication regarding hope and support, extended supportive care for patients living alone and finally increased adherence through social sessions with relatives and fellow patients.

Validation of the transplant conditioning intensity (TCI) index for allogeneic hematopoietic cell transplantation.

The intensity of the conditioning regimen given before allogeneic hematopoietic cell transplantation (allo-HCT) can vary substantially. To confirm the ability of the recently developed transplant conditioning intensity (TCI) score to stratify the preparative regimens of allo-HCT, we used an independent and contemporary patient cohort of 4060 transplant recipients with acute myeloid leukemia meeting inclusion criteria from the discovery study (allo-HCT in first complete remission, matched donor), but who were allografted in a more recent period (2018-2021) and were one decade older (55-75 years, median 63.4 years), we assigned them to a TCI category (low n = 1934, 48%; intermediate n = 1948, 48%, high n = 178, 4%) according to the calculated TCI score ([1-2], [2.5-3.5], [4-6], respectively), and examined the validity of the TCI category in predicting early non-relapse mortality (NRM), 2-year NRM and relapse (REL). In the unadjusted comparison, the TCI index provided a significant risk stratification for d100 and d180 NRM, NRM and REL risk. In the multivariate analysis adjusted for significant variables, there was an independent association of TCI with early NRM, NRM and REL. In summary, we confirm in contemporary treated patients that TCI reflects the conditioning regimen related morbidity and anti-leukemic efficacy satisfactorily and across other established prognostic factors.

Patient-Specific Measurable Residual Disease Markers Predict Outcome in Patients With Myelodysplastic Syndrome and Related Diseases After Hematopoietic Stem-Cell Transplantation.

PURPOSE: Clinical relapse is the major threat for patients with myelodysplastic syndrome (MDS) undergoing hematopoietic stem-cell transplantation (HSCT). Early detection of measurable residual disease (MRD) would enable preemptive treatment and potentially reduced relapse risk. METHODS: Patients with MDS planned for HSCT were enrolled in a prospective, observational study evaluating the association between MRD and clinical outcome. We collected bone marrow (BM) and peripheral blood samples until relapse, death, or end of study 24 months after HSCT. Patient-specific mutations were identified with targeted next-generation sequencing (NGS) panel and traced using droplet digital polymerase chain reaction (ddPCR). RESULTS: Of 266 included patients, estimated relapse-free survival (RFS) and overall survival (OS) rates 3 years after HSCT were 59% and 64%, respectively. MRD results were available for 221 patients. Relapse was preceded by positive BM MRD in 42/44 relapses with complete MRD data, by a median of 71 (23-283) days. Of 137 patients in continuous complete remission, 93 were consistently MRD-negative, 39 reverted from MRD+ to MRD-, and five were MRD+ at last sampling. Estimated 1 year-RFS after first positive MRD was 49%, 39%, and 30%, using cutoff levels of 0.1%, 0.3%, and 0.5%, respectively. In a multivariate Cox model, MRD (hazard ratio [HR], 7.99), WHO subgroup AML (HR, 4.87), TP53 multi-hit (HR, 2.38), NRAS (HR, 3.55), and acute GVHD grade III-IV (HR, 4.13) were associated with shorter RFS. MRD+ was also independently associated with shorter OS (HR, 2.65). In a subgroup analysis of 100 MRD+ patients, presence of chronic GVHD was associated with longer RFS (HR, 0.32). CONCLUSION: Assessment of individualized MRD using NGS + ddPCR is feasible and can be used for early detection of relapse. Positive MRD is associated with shorter RFS and OS (ClinicalTrials.gov identifier: NCT02872662).

A multimodal interdisciplinary rehabilitation programme (HAPPY) for patients undergoing allogeneic non-myeloablative haematopoietic stem cell transplantation: A feasibility study.

PURPOSE: To evaluate the feasibility of the multimodal interdisciplinary rehabilitation programme HAPPY, targeting patients with haematological malignancy and undergoing allogeneic non-myeloablative haematopoietic stem cell transplantation (NMA-HSCT). METHOD: A single arm longitudinal design was applied to test the feasibility of the 6-month HAPPY programme, which consisted of motivational interviewing dialogues, individual supervised physical exercise training, relaxation exercises, nutritional counselling, and home assignments. The feasibility measures included acceptability, fidelity, exposure, practicability, and safety. Descriptive statistics were conducted. RESULTS: From November 2018 to January 2020, thirty patients (mean age (SD) 64.1 (6.5)) were enrolled in HAPPY, of whom 18 patients completed the programme. Acceptance was 88%; attrition 40%; fidelity was 80%-100% for all HAPPY elements except phone calls; exposure of HAPPY elements at the hospital reflected individual differences but was acceptable, whereas exposure of HAPPY elements at home was low. Planning of HAPPY for the individual patient was time consuming, and patients were dependent of reminders and incites from the health care professionals. CONCLUSION: Most elements of the rehabilitation programme HAPPY were feasible. Yet, HAPPY will benefit from further development and simplifications before an effectiveness study can be conducted, especially regarding improvement of the intervention elements supporting patients at home.

Patients' reflections on undergoing non-myeloablative allogeneic haematopoietic stem cell transplantation and participating in a multimodal interdisciplinary rehabilitation programme: A qualitative study.

PURPOSE: To explore participants' experiences and perspectives on the relevance and meaning of participating in the multimodal interdisciplinary rehabilitation programme named 'HAPPY', and the programme's influence on their handling of everyday life during and after non-myeloablative allogeneic haematopoietic stem cell transplantation. METHOD: A qualitative interview study using Thorne's interpretive description methodology. A semi-structured interview guide and the analysis were inspired by symbolic interactionism. From April to July 2020, individual interviews were conducted with 24 patients who had participated in HAPPY while undergoing non-myeloablative haematopoietic stem cell transplantation. RESULTS: HAPPY contributed to the patients' knowledge building on the basis of three themes: Social Solidarity and Comparison, Processing Mind and Body, and Balancing Disease and Life. HAPPY supported the participants in maintaining their physical functioning and induced a perception of empowerment. Moreover, HAPPY supported patients in their efforts to familiarise themselves with their changed life conditions after the stem cell transplantation. CONCLUSION: Our findings showed that participation in HAPPY empowered patients to manage and cope with the stresses of everyday life and restore balance in their lives whilst undergoing treatment and confronting their cancer diagnosis. The findings underline the importance of elements of peer support and continuous support and facilitation from the specialist team, and the possibility to rethink the use of online technology to support and ensure a balance between disease and life and to minimise hospital visits.

Improved survival after allogeneic transplantation for acute lymphoblastic leukemia in adults: a Danish population-based study.

We investigated trends of survival in a population-based cohort study of all 181 adults who received HCT for ALL in Denmark between 2000-2019. Patients had a median (min-max) age of 36 (18-74) years at HCT and were followed for a median of eight years. Overall survival (OS) improved over time with an estimated 2-year OS of 49% (CI 27-66%) in year 2000 versus 77% (CI 59-88%) in year 2019. More patients achieved cure over time (OR for cure per year 1.07, CI 1.00-1.15), while the rate of death in non-cured patients remained stable (HR of excess mortality per year 0.99, CI 0.93-1.06). Relapse decreased over time (HR 0.92 per year, CI 0.87-0.98), whereas non-relapse mortality did not change notably (HR 0.98 per year, CI 0.93-1.04). In conclusion, survival after HCT in adults with ALL has improved over the past two decades, primarily due to more patients achieving cure.

Allogeneic haematopoietic cell transplantation with nonmyeloablative conditioning in Denmark.

INTRODUCTION: Haematopoietic cell transplantation with nonmyeloablative conditioning (NMC-HCT) is used in the treatment of haematological malignancies. MATERIAL AND METHODS: Use of NMC-HCT in Denmark from 2000-07 was examined. RESULTS: Unrelated donor searches resulted in a suitable donor in 75% of cases of which 36% were transplanted. Among 244 patients referred for NMC-HCT, 72% were transplanted. There was a significant difference in the number of NMC-HCTs between national regions. Increasing waiting time resulted in 22% of the referred patients being taken off the waiting list without NMC-HCT. CONCLUSION: Some patients may have had a chance of cure if they had been transplanted without delay.

Addition of sirolimus to standard cyclosporine plus mycophenolate mofetil-based graft-versus-host disease prophylaxis for patients after unrelated non-myeloablative haemopoietic stem cell transplantation: a multicentre, randomised, phase 3 trial.

BACKGROUND: Acute graft-versus-host-disease (GVHD) after non-myeloablative human leucocyte antigen (HLA)-matched, unrelated donor, allogeneic haemopoietic stem cell transplantation (HSCT) is associated with considerable morbidity and mortality. This trial aimed to evaluate the efficacy of adding sirolimus to the standard cyclosporine and mycophenolate mofetil prophylaxis therapy for preventing acute GVHD in this setting. METHODS: This multicentre, randomised, phase 3 trial took place at nine HSCT centres based in the USA, Denmark, and Germany. Eligible patients were diagnosed with advanced haematological malignancies treatable by allogeneic HSCT, had a Karnofsky score greater than or equal to 60, were aged older than 50 years, or if they were aged 50 years or younger, were considered at high risk of regimen-related toxicity associated with a high-dose pre-transplantation conditioning regimen. Patients were randomly allocated by an adaptive randomisation scheme stratified by transplantation centre to receive either the standard GVHD prophylaxis regimen (cyclosporine and mycophenolate mofetil) or the triple-drug combination regimen (cyclosporine, mycophenolate mofetil, and sirolimus). Patients and physicians were not masked to treatment. All patients were prepared for HSCT with fludarabine (30 mg/m2 per day) 4, 3, and 2 days before receiving 2 or 3 Gy total body irradiation on the day of HSCT (day 0). In both study groups, 5·0 mg/kg of cyclosporine was administered orally twice daily starting 3 days before HSCT, and (in the absence of GVHD) tapered from day 96 through to day 150. In the standard GVHD prophylaxis group, 15 mg/kg of mycophenolate mofetil was given orally three times daily from day 0 until day 30, then twice daily until day 150, and (in the absence of GVHD) tapered off by day 180. In the triple-drug group, mycophenolate mofetil doses were the same as in the standard group, but the drug was discontinued on day 40. Sirolimus was started 3 days before HSCT, taken orally at 2 mg once daily and adjusted to maintain trough concentrations between 3-12 ng/mL through to day 150, and (in the absence of GVHD) tapered off by day 180. The primary endpoint was the cumulative incidence of grade 2-4 acute GVHD at day 100 post-transplantation. Secondary endpoints were non-relapse mortality, overall survival, progression-free survival, cumulative incidence of grade 3-4 acute GVHD, and cumulative incidence of chronic GVHD. Efficacy and safety analyses were per protocol, including all patients who received conditioning treatment and underwent transplantation. Toxic effects were measured according to the Common Terminology Criteria for Adverse Events (CTCAE). The current study was closed prematurely by recommendation of the Data and Safety Monitoring Board on July 27, 2016, after 168 patients received the allocated intervention, based on the results of a prespecified interim analysis for futility. This study is registered with ClinicalTrials.gov, number NCT01231412. FINDINGS: Participants were recruited between Nov 1, 2010, and July 27, 2016. Of 180 patients enrolled in the study, 167 received the complete study intervention and were included in safety and efficacy analyses: 77 patients in the standard GVHD prophylaxis group and 90 in the triple-drug group. At the time of analysis, median follow-up was 48 months (IQR 31-60). The cumulative incidence of grade 2-4 acute GVHD at day 100 was lower in the triple-drug group compared with the standard GVHD prophylaxis group (26% [95% CI 17-35] in the triple-drug group vs 52% [41-63] in the standard group; HR 0·45 [95% CI 0·28-0·73]; p=0·0013). After 1 and 4 years, non-relapse mortality increased to 4% (95% CI 0-9) and 16% (8-24) in the triple-drug group and 16% (8-24) and 32% (21-43) in the standard group (HR 0·48 [0·26-0·90]; p=0·021). Overall survival at 1 year was 86% (95% CI 78-93) in the triple-drug group and 70% in the standard group (60-80) and at 4 years it was 64% in the triple-drug group (54-75) and 46% in the standard group (34-57%; HR 0·62 [0·40-0·97]; p=0·035). Progression-free survival at 1 year was 77% (95% CI 68-85) in the triple-drug group and 64% (53-74) in the standard drug group, and at 4 years it was 59% in the triple-drug group (49-70) and 41% in the standard group (30-53%; HR 0·64 [0·42-0·99]; p=0·045). We observed no difference in the cumulative incidence of grade 3-4 acute GVHD (2% [0-5] in the triple-drug group vs 8% [2-14] in the standard group; HR 0·55 [0·16-1·96]; p=0·36) and chronic GVHD (49% [39-59] in triple-drug group vs 50% [39-61] in the standard group; HR 0·94 [0·62-1·40]; p=0·74). In both groups the most common CTCAE grade 4 or higher toxic effects were pulmonary. INTERPRETATION: Adding sirolimus to cyclosporine and mycophenolate mofetil resulted in a significantly lower proportion of patients developing acute GVHD compared with patients treated with cyclosporine and mycophenolate mofetil alone. Based on these results, the combination of cyclosporine, mycophenolate mofetil, and sirolimus has become the new standard GVHD prophylaxis regimen for patients treated with non-myeloablative conditioning and HLA-matched unrelated HSCT at the Fred Hutchinson Cancer Research Center. FUNDING: National Institutes of Health.

Evaluation of infliximab as second-line treatment of acute graft versus host disease -validating response on day 7 and 28 as predictors of survival.

Several immunosuppressive drugs have been proposed for second-line treatment of steroid-refractory acute graft versus host disease (aGvHD) after allogeneic hematopoietic stem cell transplantation. However, the studies on these drugs are small, retrospective, uncontrolled and use different endpoints. Therefore, it remains unknown which treatment is superior. We retrospectively evaluated 68 consecutive patients treated with infliximab for aGvHD. We adhered to recently proposed guidelines for aGvHD trials and thus evaluated response on day 7 and 28. Furthermore, we assessed the composite endpoint 6 months freedom from treatment failure (6MFTF). The majority of patients had grade III-IV aGvHD. We found that 41 patients (60%) responded on day 7 and 31 patients (46%) on day 28. Twenty-four patients (35%) achieved 6MFTF. The main reasons for failure within 6 months were death (n = 31) or additional immunosuppression (n = 16). By six and 24 months, 44 and 34% of the patients were alive respectively. Patients with response to infliximab on day 7 and 28 had significantly higher overall survival (OS) probability than non-responders. We show that response on day 7 and 28 identifies high and low risk groups. Patients who fail to respond should be identified early and offered alternative therapy.

Peripheral blood accessory cells modulate committed colony-forming units but not 5-week cobblestone-area-forming cell outgrowth from CD34+ cells.

While cellular modulation in vitro of committed hematopoietic stem cell (HSC) growth has been known for some time, less is known about the effect of accessory cells (AC) on the growth of more immature HSC. We have examined the effect of peripheral blood (PB) AC on hematopoiesis by coculturing enriched PB CD34+ cells (>96% pure) with different quantities of CD34 cells (<1% contamination) harvested from 10 breast cancer patients. As expected colony growth was predominantly present in the CD34+ fractions, in which colony forming units granulocyte-macrophage (CFU-GM) varied between 89-3289/10(5) (median 1422/10(5) seeded cells) and week 5 cobblestone area forming cells (CAFC) between 64-1330/10(5) (median 427/10(5) seeded cells). Few CFU-GM (0-27/10(5) seeded cells) and no week 5 CAFC (0-1/10(5) seeded cells) were present in the CD34 fractions. The addition of PB CD34 cells to cultures of CD34+ cells resulted in a considerable variation in the cloning efficiency at the CFU-GM level, and the extent of modulation within the single patient was inconsistent between the different CD34+/CD34 cell mixtures. Overall the stimulatory effect was more pronounced than inhibition and on average the CFU-GM formation per CD34+ cell seeded increased 3 fold (stimulatory effect ranged between 3-17 fold and decreases between 2-10 fold). In contrast, the cloning efficiency at the week 5 CAFC level of differentiation remained unaffected by the addition of different amounts of CD34 cells (the stimulatory effect was maximally 3-fold and inhibition 3-fold). We conclude that while the CFU assay is modulated by the presence of AC, the CAFC assay is more robust and can be employed as a reliable and reproducible tool for HSC measurement.