Non-trial Patients Research Articles

Validation of SKY92 high and low risk prognostication in a retrospective, multinational cohort of 155 non-trial multiple myeloma patients

Genetic hallmarks of multiple myeloma (MM) patients have been extensively studied based on biobanked samples that have been collected as part of clinical trials. For example, the gene expression profiling (GEP) based SKY92 signature, which identifies ∼15-20% of patients as high risk, has been independently validated in more than ten trials as a prognostic factor for progression free survival (PFS), and overall survival (OS). Limited evidence is available outside of trials, and here we present the first analysis of SKY92 and other markers on real-world MM data.

Assessing the efficacy and safety of magnesium sulfate for management of autonomic nervous system dysregulation in Vietnamese children with severe hand foot and mouth disease

BackgroundBrainstem encephalitis is a serious complication of hand foot and mouth disease (HFMD) in children. Autonomic nervous system (ANS) dysregulation and hypertension may occur, sometimes progressing to cardiopulmonary failure and death. Vietnamese national guidelines recommend use of milrinone if ANS dysregulation with Stage 2 hypertension develops. We wished to investigate whether magnesium sulfate (MgSO4) improved outcomes in children with HFMD if used earlier in the evolution of the ANS dysregulation (Stage 1 hypertension).MethodsDuring a regional epidemic we conducted a randomized, double-blind, placebo-controlled trial of MgSO4 in children with HFMD, ANS dysregulation and Stage 1 hypertension, at the Hospital for Tropical Diseases in Ho Chi Minh city. Study participants received an infusion of MgSO4 or matched placebo for 72 h. We also reviewed data from non-trial HFMD patients in whom milrinone failed to control hypertension, some of whom received MgSO4 as second line therapy. The primary outcome for both analyses was a composite of disease progression within 72 h - addition of milrinone (trial participants only), need for ventilation, shock, or death.ResultsBetween June 2014 and September 2016, 14 and 12 participants received MgSO4 or placebo respectively, before the trial was stopped due to futility. Among 45 non-trial cases with poorly controlled hypertension despite high-dose milrinone, 33 received MgSO4 while 12 did not. There were no statistically significant differences in the composite outcome between the MgSO4 and the placebo/control groups in either study (adjusted relative risk (95%CI) of [6/14 (43%) vs. 6/12 (50%)], 0.84 (0.37, 1.92), p = 0.682 in the trial and [1/33 (3%) vs. 2/12 (17%)], 0.16 (0.01, 1.79), p = 0.132 in the observational cohort). The incidence of adverse events was similar between the groups. Potentially toxic magnesium levels occurred very rarely with the infusion regime used.ConclusionAlthough we could not demonstrate efficacy in these studies, there were no safety signals associated with use of 30-50 mg/kg/hr. MgSO4 in severe HFMD. Intermittent outbreaks of HFMD are likely to continue across the region, and an adequately powered trial is still needed to evaluate use of MgSO4 in controlling hypertension in severe HFMD, potentially involving a higher dose regimen.Trial registrationClinicalTrials.gov Identifier: NCT01940250 (Registered 22 AUG 2013).Trial sponsor: University of Oxford

Arrhythmic episodes in patients implanted with a cardioverter-defibrillator \u2013 results from the Prospective Study on Predictive Quality with Preferencing PainFree ATP therapies (4P)

BackgroundLittle is known about the ICD performance using enhanced detection algorithms in unselected, non-trial patients. Performance of recent generation ICD equipped with SmartShock™ technology (SST) for detection and conversion of ventricular tachyarrhythmias (VTA) was investigated.Methods4P was a prospective, multicenter, observational study conducted in 10 Swiss implanting centers. Patients with a Class I indication according to international guidelines were included and received an ICD with SST. ICD discrimination capability was assessed by evaluating SST performance; therapy efficacy was assessed by rate of VTA conversions by ATP and by rescue shocks.ResultsOverall, 196 patients were included in the analysis with a mean duration of follow-up of 27.7 months (452 patient-years of observation). Patient-specific rather than recommended programming was preferred. Device-detected episodes were frequent (5147 episodes in 146 patients, 74.5%). In 44 patients (22.4%), 1274 episodes were categorized as VTA; only 215 episodes were symptomatic. ATP was the first-line therapy and highly effective (99.9% success rate at the episode level, 100.0% at the patient level). Rescue shocks were rare (66 episodes in 28 patients); 7 shocks in 5 patients (2.6%) were inappropriate. Death and hospitalization rates were low.ConclusionsIn a cohort of non-trial, unselected ICD patients, VTA episodes were frequent. The 4P results confirm the robustness of VTA detection by SST and the effectiveness of ATP treatment, hence limiting overall ICD shock burden.

Clinical validity of CTS5 for estimating risk of late recurrence in unselected, non-trial patients with early ER+ breast cancer.

514 Background: The Clinical Treatment Score at 5 years (CTS5) is a prognostic tool using clinicopathological data to estimate distant recurrence (DR) risk after 5 years of endocrine therapy for postmenopausal women with estrogen receptor positive (ER+) breast cancer. It was developed and validated in the ATAC and BIG 1-98 trials. Methods: The validity of CTS5 was tested in a retrospective cohort of unselected, non-trial patients diagnosed with early ER+ breast cancer at the Royal Marsden Hospital from 2000-2007 who were alive and distant recurrence-free at 5 years. The primary endpoint was time to late DR (5-10 years). Cox regression models were used to determine the prognostic value of CTS5 and to produce Kaplan-Meier curves with associated 10-year DR risks (%). Results: A total of 2428 women were included with a median follow-up of 9.34 years from diagnosis. The CTS5 was significantly prognostic for late DR in post- and premenopausal women (Table). Risk stratification by CTS5 of the postmenopausal cohort was comparable with the development cohort. 42.1% of postmenopausal women were categorised into the low risk group with a late DR risk of 4.9% and these women had significantly lower risk of late DR compared to those in the intermediate or high-risk groups (Table). Amongst the premenopausal cohort, 41% were categorised as low risk with a late DR risk of 4.9%. The prognostic effect of CTS5 was seen for chemotherapy treated (HR=2.26, 95% CI (1.68-3.03)) and untreated patients (HR=1.93, 95% (1.32-2.82)). Conclusions: CTS5 demonstrated clinical validity for predicting late DR within a large cohort of unselected, non-trial patients that included premenopausal women. The low risk cohort identified by the CTS5 represents a group of women whose risk of late DR is so low as to not warrant extended endocrine therapy to ten years. [Table: see text]

Commercial Chimeric Antigen Receptor (CAR) T Cells: Unfamiliar Roads and Stalled Cars

The FDA approval of the anti-CD19 chimeric antigen receptor (CAR) T-cell product axicabtagene ciloleucel (axi-cel, YESCARTA®) was based on ZUMA-1 (NCT 02348216), a multi-center phase 2 trial of 111 patients with relapsed/refractory large cell lymphoma (Neelapu et al. NEJM 2017). Without a standardized reimbursement pathway, the complex workflow of axi-cel may increase delays in care for patients who are otherwise eligible for treatment. We hypothesized that the time to treatment, and probability of receiving treatment with commercial axi-cel, would be inferior to our experience on ZUMA-1 and lead to adverse patient outcomes. From Jan 2016 to Feb 2017, we enrolled 5 patients on ZUMA-1. Using similar eligibility criteria, we intended to treat 25 patients with commercial axi-cel from Nov 2017 to Aug 2018. Time-to-treatment was calculated from date of informed consent (ZUMA-1) or from insurance verification (non-trial patients) and ended at infusion. Time-to-treatment was significantly shorter for ZUMA-1 compared to non-trial patients (mean 31.8 days vs 77.5 days, P:0.003). ZUMA-1 patients were older (mean 64.8 vs. 56.0 years, P:ns), received more lines of chemotherapy prior to initiating the approval process (4.4 vs. 3.3 lines, P:ns), and had a larger volume of disease (largest lesion 36 cm2vs 16.4cm2, P:ns). The majority of non-trial patients (6/8) received bridging chemotherapy (0-2 lines), and there were 5 hospitalizations totaling 27 days. Steroid use was similar between groups (40.0% vs 37.5%) and more non-trial patients received tocilizumab (40.0% vs 62.5%, P=ns), possibly due to updated toxicity guidelines. In the non-trial group, 10 patients became ineligible due to death (6), transfer to another institution (2), clinical decline (1), and loss of follow-up (1) with a mean time to ineligibility of 54.8 days (range 9-91 days). Seven eligible patients are awaiting reimbursement approval (mean 47.3 days, range 5-166 days). ZUMA-1 outcomes were superior to commercial patients with all 5 patients achieving a response by day 30 and all 3 initial partial responses (PRs) deepening to a complete response (CR). In the non-trial group, there were 3 CRs, 2 PRs, 1 stable disease, and 2 patients with disease progression at/before day 30. All ZUMA-1 patients are alive after a median of 721 days vs 7/8 axi-cel patients (median follow-up 78.5 days). In our non-trial experience, treatment with axi-cel resulted in a superior overall survival compared to being untreated (not reached vs 61 days, P:0.01). This single-center experience highlights the ongoing challenges with axi-cel in the real world setting compared with the experience on ZUMA-1, including delays in insurance approval, use of bridging chemotherapy, added chemotherapy toxicity, and increased mortality while awaiting treatment. Standardized reimbursement pathways are needed to ensure timely access to these therapies.

Patient preferences for adjuvant radiotherapy in early breast cancer are strongly influenced by treatment received through random assignment.

Objective TARGIT‐A randomised women with early breast cancer to receive external beam radiotherapy (EBRT) or intraoperative radiotherapy (TARGIT‐IORT). This study aimed to identify what extra risk of recurrence patients would accept for perceived benefits and risks of different radiotherapy treatments.MethodsPatient preferences were determined by self‐rated trade‐off questionnaires in two studies: Stage (1) 209 TARGIT‐A participants (TARGIT‐IORT n = 108, EBRT n = 101); Stage (2) 123 non‐trial patients yet to receive radiotherapy (pre‐treatment group), with 85 also surveyed post‐radiotherapy. Patients traded‐off risks of local recurrence in preference selection between TARGIT‐IORT and EBRT.Results TARGIT‐IORT patients were more accepting of IORT than EBRT patients with 60% accepting the highest increased risk presented (4%–6%) compared to 12% of EBRT patients, and 2% not accepting IORT at all compared to 43% of EBRT patients. Pre‐treatment patients were more accepting of IORT than post‐treatment patients with 23% accepting the highest increased risk presented compared to 15% of post‐treatment patients, and 15% not accepting IORT at all compared to 41% of pre‐treatment patients.ConclusionsBreast cancer patients yet to receive radiotherapy accept a higher recurrence risk than the actual risk found in TARGIT‐A. Measured patient preferences are highly influenced by experience of treatment received. This finding challenges the validity of post‐treatment preference studies.

Study investigating the generalisability of a COPD trial based in primary care (Salford Lung Study) and the presence of a Hawthorne effect

IntroductionTraditional phase IIIb randomised trials may not reflect routine clinical practice. The Salford Lung Study in chronic obstructive pulmonary disease (SLS COPD) allowed broad inclusion criteria and followed patients in...

External validation of the TIMI risk score for secondary cardiovascular events among patients with recent myocardial infarction

Background and aimsRisk stratification of patients with recent myocardial infarction (MI) for subsequent cardiovascular (CV) events helps identify patients most likely to benefit from secondary prevention therapies. This study externally validated a new risk score (TRS2˚P) for secondary events derived from the TRA2°P-TIMI 50 trial among post-MI patients from two large health care systems. MethodsThis retrospective cohort study included 9618 patients treated for acute MI at either the Cleveland Clinic (CC) or Geisinger Health System (GHS) between 2008 and 2013. Patients with a clinic visit within 2–52 weeks of MI were included and followed for CV death, repeat MI, and ischemic stroke through electronic medical records (EMR). The TRS2˚P is based on nine factors determined through EMR documentation. Discrimination and calibration of the TRS2˚P were quantified in both patient populations. ResultsMI patients at CC and GHS were older, had more comorbidities, received fewer medications, and had higher 3-year event rates compared to subjects in the TRA2°P trial: 31% (CC), 33% (GHS), and 10% (TRA2°P-TIMI 50). The proposed risk score had similar discrimination across the three cohorts with c-statistics of 0.66 (CC), 0.66 (GHS), and 0.67 (TRA2°P-TIMI 50). A strong graded relationship between the risk score and event rates was observed in all cohorts, though 3-year event rates were consistently higher within TRS2°P strata in the CC and GHS cohorts relative to TRA2˚P-TIMI 50. ConclusionsThe TRS2˚P demonstrated consistent risk discrimination across trial and non-trial patients with recent MI, but event rates were consistently higher in the non-trial cohorts.

Longer Inflation Duration and Predilation–Sizing–Postdilation Improve Bioresorbable Scaffold Outcomes in a Long-term All-Comers Canadian Registry

BackgroundReal-world long-term safety and efficacy of the ABSORB (Abbott Vascular, Santa Clara, CA) bioresorbable vascular scaffold has not been well characterized in the literature, particularly in the setting of acute coronary syndromes (ACS). Herein, we report outcomes up to 4 years in such a high-risk cohort, with identification of parameters associated with better outcomes. MethodsReABSORB is a Canadian dual-centre, prospective, nonrandomized, all-comers registry consisting of 125 consecutively enrolled nontrial patients between October 2012 and December 2016. Angiographic and clinical follow-up is now available up to 4 years. ResultsAverage age was 59 ± 11 years and 69% were male. Most (70.4%) presented with ACS and the median available follow-up was 1330 days (interquartile range, 1035-1483). Treated lesions (n = 163) were type A in 23%, type B (1 or 2) in 64%, and type C in 13%. Procedural success and device success were 98.2% and 98.8%, respectively. Using Kaplan–Meier methods, major adverse cardiac event-free survival (EFS) up to 4 years of clinical follow-up was 90.7% overall. However, use of a predilation–sizing–postdilation (PSP) technique was associated with an EFS rate of 95.8% vs 74.0% without PSP (P = 0.001). No significant differences in major adverse cardiac EFS rates were found between patients with or without ACS (92.7% vs 86.0%, respectively, P = 0.239). Use of PSP as well as inflation time ≥ 60 seconds were independent predictors of EFS at 2 years. ConclusionsIn this prospective, real-world registry with mostly ACS patients, use of the recommended PSP implantation technique and longer inflations times were associated with significantly higher EFS.

Are survival and mortality rates associated with recruitment to clinical trials in teenage and young adult patients with acute lymphoblastic leukaemia? A retrospective observational analysis in England

ObjectiveParticipation rates in clinical trials are low in teenagers and young adults (TYA) with cancer. Whilst the importance of clinical trials in informing best practice is well established, data regarding...

Evaluation of Preoperative Weight Loss for Elective Hernia Repair in the Veteran Population

The safety and efficacy of preoperative weight loss before elective nonbariatric surgery is controversial. We evaluated the effect of planned surgical delay for a preoperative weight loss trial in hernia repairs. Four hundred and fourteen patients undergoing elective hernia repair between July 2008 and May 2012 at a Level 1B VA Medical Center were identified. Included patients were divided into two groups: those who underwent immediate hernia repair (nontrial) and those who underwent weight loss trial before hernia repair (TRIAL). Twenty-two patients were categorized in the TRIAL group, and 392 in nontrial. Time from surgical evaluation to operation was longer in the TRIAL vs nontrial group (226 days vs 113 days, P = 0.001). Outcome measures were similar between groups. Net change in body mass index (BMI) was -2.2 per cent in TRIAL vs -0.86 per cent in nontrial patients (P = 0.440). Of the TRIAL patients, ten obtained a poor result (<3% decreased BMI), nine a moderate result (3-10% decreased BMI), and three a good result (>10% decreased BMI). Weight loss trials in elective hernia patients appear to be safe, although they result in significant delay to surgery and confer no difference in postoperative outcomes. Thus, efficacy of preoperative weight loss trials may be limited.

Pharmacokinetic-Guided Dosing of New Oral Cancer Agents.

Generally, licensed drug-dosing recommendations for chemotherapy are based on results from clinical trials in which subjects are usually of relatively normal body size, middle-aged, and are relatively racially homogeneous, with minimal comorbidity and specific tumor characteristics. Very few nontrial patients meet these characteristics, resulting in clinical practice having to extrapolate dosing recommendations to the specific patient. There is insufficient research on the impact of obesity-associated physiological changes prevalent in patients with common cancers on standard pharmacokinetic and pharmacodynamic parameters. Yet quantifying the influence of obesity on the pharmacology of chemotherapy is vital, as dosing inappropriate for body composition (ie, flat dosing or mg/kg based on total body weight) may increase the risk of adverse events and reduce clinical effectiveness. Unfortunately, there are few cancer guidelines to aid clinicians in selecting the optimal dose in the obese-even recent guidelines are based predominantly on clinical opinion/current practice in treating obese patients, rather than evidence. Data in many other vulnerable groups, for example, those with significant comorbidity and older patients, are also scarce. Because of the known limitations of body surface area-guided dosing, therapeutic drug monitoring or pharmacokinetic-guided dosing, which predicts an individual's exposure, has increasingly been shown to be a powerful tool in cancer therapy. Used appropriately, it can adjust for differences in pharmacokinetic parameters not considered when body size-based dosing or "one dose fits all" is used. This review will focus predominantly on the rationale for pharmacokinetic-guided dosing of the newer oral molecularly targeted antineoplastics in people whose drug exposure is not predicted by their physiology or body composition.

Characterization of atrial fibrillation adverse events reported in ibrutinib randomized controlled registration trials.

The first-in-class Bruton’s tyrosine kinase inhibitor ibrutinib has proven clinical benefit in B-cell malignancies; however, atrial fibrillation (AF) has been reported in 6–16% of ibrutinib patients. We pooled data from 1505 chronic lymphocytic leukemia and mantle cell lymphoma patients enrolled in four large, randomized, controlled studies to characterize AF with ibrutinib and its management. AF incidence was 6.5% [95% Confidence Interval (CI): 4.8, 8.5] for ibrutinib at 16.6-months versus 1.6% (95%CI: 0.8, 2.8) for comparator and 10.4% (95%CI: 8.4, 12.9) at the 36-month follow up; estimated cumulative incidence: 13.8% (95%CI: 11.2, 16.8). Ibrutinib treatment, prior history of AF and age 65 years or over were independent risk factors for AF. Multiple AF events were more common with ibrutinib (44.9%; comparator, 16.7%) among patients with AF. Most (85.7%) patients with AF did not discontinue ibrutinib, and more than half received common anticoagulant/antiplatelet medications on study. Low-grade bleeds were more frequent with ibrutinib, but serious bleeds were uncommon (ibrutinib, 2.9%; comparator, 2.0%). Although the AF rate among older non-trial patients with comorbidities is likely underestimated by this dataset, these results suggest that AF among clinical trial patients is generally manageable without ibrutinib discontinuation (clinicaltrials.gov identifier: 01578707, 01722487, 01611090, 01646021).

Umbilical Cord Blood Transplantation in Children with Acute Leukemia: Impact of Conditioning on Transplantation Outcomes

The Blood and Marrow Transplant Clinical Trials Network (BMT CTN 0501) randomized children with hematologic malignancies to transplantation with 1 or 2 cord blood units (UCB) between 2006 and 2012. While the trial concluded that survival was similar regardless of number of units infused, survival was better than previously reported. This prompted a comparison of survival of trial versus nontrial patients to determine the generalizability of trial results and whether survival was better because of the trial treatment regimen. During the trial period, 396 recipients of a single UCB unit met trial eligibility but were not enrolled. Trial patients (n = 100) received total body irradiation (TBI) 1320 cGy, cyclophosphamide 120 mg/kg, and fludarabine 75 mg/m2 (TCF). Nontrial patients either received the same regimen (n = 62; nontrial TCF) or alternative regimens (n = 334; nontrial regimens). Five-year survival between trial and nontrial patients conditioned with TCF was similar (70% versus 62%). However, 5-year survival was significantly lower with nontrial TBI-containing (47%; hazard ratio [HR], 1.97; P = .001) and chemotherapy-only regimens (49%; HR, 1.87; P = .007). The results of BMT CTN 0501 appear generalizable to the population of trial-eligible patients. The survival difference between the trial-specified regimen and other regimens indicate the importance of conditioning regimen for UCB transplantation.

Immune-Related Adverse Events as a Biomarker in Non-Melanoma Patients Treated with Programmed Cell Death 1 Inhibitors.

The programmed death 1 (PD-1) checkpoint inhibitors (CKIs) can lead to immune-related adverse events (irAEs). We sought to evaluate whether the development of irAEs correlates with treatment response in non-melanoma malignancies. We conducted a retrospective study of patients who received anti-PD-1 CKI monotherapy at Fox Chase Cancer Center. Endpoints included overall response rate (ORR), time to next therapy or death (TTNTD), and overall survival (OS). Fisher's exact tests and logistic regression models were used to determine the association between irAE incidence and ORR, and Kaplan-Meier curves with log-rank tests and Cox regression models were used for the comparison of TTNTD and OS. Between November 2011 and November 2016, 160 patients were treated with >1 dose of an anti-PD-1 CKI. Seventy-three (46%) were treated on a clinical trial. Immune-related adverse events were noted in 64 patients (40%), with steroids required in 36 (23%). Of the 142 patients evaluable for clinical response, 28 patients (20%) achieved a partial response at first scan. An association between irAEs and ORR was seen in clinical trial patients (p = .007), but not in non-trial patients (p = .13). When controlling for clinical trial participation and cancer type using multivariate analysis, low-grade irAEs had higher ORR (p = .017) and longer TTNTD (p = .008). No association between irAE incidence and OS was seen (p = .827). Immune-related adverse events that required steroid treatment were marginally associated with increased TTNTD (p = .05, hazard ratio 0.62) but were not associated with OS (p = .13). We demonstrate several positive associations between the development of irAEs and clinical outcomes in non-melanoma patients treated with PD-1 CKIs, for which further validation is required. This study evaluated whether the development of immune-related adverse events in non-melanoma patients treated with programmed cell death 1 checkpoint inhibitors correlates with improved clinical outcomes. The results indicate that for a subset of patients, in particular those with low-grade immune-related adverse events, immune-related adverse events predicted for an improved response rate and longer time to next therapy or death.

Impact of duodenal invasion on outcomes in patients with pancreatic cancer treated with stereotactic body radiotherapy.

408 Background: Clinical trials for pancreatic adenocarcinoma patients treated with a uniform SBRT tumor dose prescription exclude tumors invading the duodenum due to potential for increased GI mucosal complications. We analyzed our non-trial patients to determine the impact of SBRT in the setting of known duodenal invasion. Methods: An IRB-approved institutional database was queried identifying all 220 localized borderline resectable or locally advanced pancreatic cancer patients treated with SBRT from 2009 to 2015. Eligibility included patients with head tumors, a minimum of 6 months of follow up, and duodenal invasion on pretreatment endoscopic ultrasound (EUS). Dose painted SBRT delivered 25-30 Gy to tumor abutting the duodenum and up to 50 Gy to focal tumor/vessel abutment. Analysis evaluated whether patients with duodenal invasion had increased incidence of grade ≥ 3 (G3+) toxicity, GI ulceration or bleeding, or worsened overall survival (OS). Fisher’s Exact Test (2-tailed) compared patient characteristics and binary outcomes. Survival estimates by Kaplan-Meier were compared using log-rank test. Results: The study population included 126 patients (median F/U 14.1 months). Of 23 patients with duodenal invasion, 14 (61%) underwent resection, 3 (13%) developed G3+ toxicity and 1 (4%) had acute pre-op G3 GI bleeding that was controlled endoscopically prior to surgery. Of 103 without duodenal invasion, 48 (47%) underwent resection, 9 (9%) suffered G3+ toxicity and 7 (7%) had any GI bleed or ulceration. None of the 7 patients with GI bleeding or ulceration underwent pancreatectomy, and 3 had bleeding from tumor progression into the duodenum. There was no association between duodenal invasion and the incidence of G3+ toxicity (p = 0.76) or GI ulceration/bleeding (p = 1.0). There was no worsened OS (p = 0.17) or G3+ toxicity (p = 0.22) for patients with duodenal invasion on EUS. Patients with a GI bleeding or ulceration event had decreased OS (p = .014). Conclusions: Duodenal invasion on EUS prior to SBRT did not worsen GI bleeding risk or survival. Our data suggests that excluding pancreatic adenocarcinoma patients with duodenal invasion from SBRT when using a dose-painted approach is unnecessary.

Clinical Correlates of Benefit From Radium-223 Therapy in Metastatic Castration Resistant Prostate Cancer.

We sought to identify potential clinical variables associated with outcomes after radium-223 therapy in routine practice. Consecutive non-trial mCRPC patients who received ≥1 dose of radium dichloride-223 at four academic and one community urology-specific cancer centers from May 2013 to June 2014 were retrospectively identified. Association of baseline and on-therapy clinical variables with number of radium doses received and clinical outcomes including overall survival were analyzed using chi-square statistics, cox proportional hazards, and Kaplan-Meier methods. Bone Scan Index (BSI) was derived from available bone scans using EXINI software. One hundred and forty-five patients were included. Radium-223 was administered for six cycles in 74 patients (51%). One-year survival in this heavily pre-treated population was 64% (95%CI: 54-73%). In univariate and multivariate analysis, survival was highly associated with receiving all six doses of Radium-223. Receipt of six doses was associated with ECOG PS of 0-1, lower baseline PSA & pain level, no prior abiraterone/enzalutamide, <5 BSI value, and normal alkaline phosphatase. In patients who reported baseline pain (n = 72), pain declined in 51% after one dose and increased in 7%. PSA declined ≥50% in 16% (18/110). Alkaline phosphatase declined ≥25% in 48% (33/69) and ≥50% in 16/69 patients. BSI declined in 17 (68%) of the 25 patients who had bone scan available at treatment follow-up. Grade ≥3 neutropenia, anemia, and thrombocytopenia occurred in 4% (n = 114), 4% (n = 125), and 5% (n = 123), respectively. Patients earlier in their disease course with <5 BSI, low pain score, and good ECOG performance status are optimal candidates for radium-223. Radium-223 therapy is well tolerated with most patients reporting declines in pain scores and BSI. Prostate 77:479-488, 2017. © 2016 Wiley Periodicals, Inc.

Umbilical Cord Blood (UCB) Transplantation in Children with Acute Leukemia: Impact of Conditioning Regimen on Transplant Outcomes

The Blood and Marrow Transplant Clinical Trials Network (BMT CTN 0501; NCT00412360) randomized children with hematologic malignancy to one or two cord blood unit transplantation between December 2006 and February 2012. While the trial concluded that survival was similar regardless of number of units infused, results were generally better than those previously reported after single UCB transplant. The apparently improved survival in recipients of BMT CTN 0501 compared to prior studies in children transplanted with a single UCB unit prompted a comparison of trial versus non-trial treatment outcomes to determine 1) the generalizability of trial results and 2) whether survival was better for patients treated with the trial regimen. Using data reported to the Center for International Blood and Marrow Transplant Research during the trial period, 396 recipients of one UCB unit transplant met the broad eligibility criteria for BMT CTN 0501 (i.e. aged 1- 21 years, high-risk acute leukemia, performance score ≥70). Trial and non-trial patients were comparable in their HCT-CI score. Trial patients (n=100) received total body irradiation (TBI) 1320 cGy, cyclophosphamide 120 mg/kg, and fludarabine 75 mg/m2 (TCF). Non-trial patients either received the same regimen as in the trial (N=62; non-trial TCF) or an alternative regimen (N=334; non-trial non-TCF regimen). Excluded were 13 patients on BMT CTN 0501 randomized to receive a single UCB unit for malignant diseases other than acute leukemia. Patient and disease characteristics of those treated on BMT CTN 0501 and others were similar except that those who received non-trial TCF regimen were more likely to report performance scores of 80 or 70 (24% versus 11%, p=0.04) and transplanted in relapse (18% vs. 5%, p=0.02) and those that received non-TCF regimens were more likely to 1-10 years of age (76% versus 53%, p<0.0001). Sixty-three percent of non-trial non-TCF regimens included TBI (≥1000 cGy) and the predominant non-TBI regimen was busulfan and cyclophosphamide. All patients received a calcineurin inhibitor for graft-versus-host disease (GVHD) prophylaxis. Donor-recipient HLA-match, median infused total nucleated cells and median follow up times were similar across the groups. Three-year survival rates were similar between patients receiving TCF regimen either on (A) or off trial (B), Figure1A, p=0.83. Similarly, there were no differences in hematopoietic recovery, relapse or non-relapse mortality between trial and non-trial TCF. However, compared to TCF on trial (A), overall survival rates were significantly lower with non-TCF non-TBI (C) and TBI (D) containing regimens after adjusting for age, CMV serostatus, disease and disease status; Figure 1B, 68% versus 55% (p=0.001) and 68% versus 50% (p=0.04), respectively. Results of multivariate analysis are shown in Table 1. Compared to patients treated on trial (TCF regimen; 20% at 3-years) relapse rates were higher with non-TCF non-TBI (42%, p=0.003) but not TBI-containing regimens (25%, p=0.38) after adjusting for age, disease, disease status and CMV seropositivity. Among non-TCF patients, relapse risk was higher for non-TBI compared to TBI-containing regimens (hazard ratio [HR] 1.61, p=0.02) but not mortality risk (HR 0.93, p=0.74). Cytogenetic risk features were not associated with relapse or survival. There were no differences in hematopoietic recovery, acute and chronic GVHD. The results of BMT CTN 0501 appear generalizable to the population of trial eligible patients. The survival differences between the trial specified and other conditioning regimens support use of the TCF regimen to improve survival. It also indicates the importance of conditioning regimen for outcome and may serve as a stimulus to design trials to identify the optimal regimen for children with acute leukemia undergoing UCB transplantation. [Display omitted] [Display omitted] DisclosuresNo relevant conflicts of interest to declare.

Factors Influencing Outcomes of Relapse from Front-Line Autologous Stem Cell Transplant (ASCT) over a 14 Year Period: A Single Centre Experience

Background. Chemotherapy followed by ASCT is standard of care in fit transplant-eligible newly diagnosed patients with Multiple Myeloma (MM). Most patients, however, will relapse and require further treatment. With increasing choice of therapies at relapse, we need to understand the determinants of treatment outcomes for these patients, to aid management decisions and patient counselling.Methods. This was a retrospective analysis of sequential patients who relapsed from upfront ASCT carried out between 2000-2014. PFS1 was defined as time from ASCT to 1st progression or death; PFS2, time from ASCT to 2nd progression or death and 2nd PFS, time from start of salvage regimen to 2nd progression or death. Post relapse survival (PRS) was measured from progression date and overall survival (OS) from ASCT date. Disease response, and adverse FISH were assigned according to IMWG. Survival was estimated using Kaplan- Meier curves and correlative analysis by Cox regression models.Results. Of 474 patients undergoing ASCT (2000-2014), 277 relapsed with a median age of 58 years (range 29-70).The M:F ratio was 1.85:1. Isotypes identified were: IgG 57.0%, IgA 22.7%, light chain 15.9%. Median PFS1 from ASCT was 20 months (0.47-128.3). ORR pre-ASCT was 91.3% (sCR/CR 4.4%, VGPR 25.4%) and post ASCT was 95.3% (sCR/CR 14.5%, VGPR 52.2%). At relapse, median age was 60 years (30-73) and 36.5% of patients had ISS stage2-3 disease. For the 277 patients who relapsed, median OS from ASCT was 67 months (CI 57-73) and median PRS was 40 months (35-44). PFS1 had a strong influence on OS, HR 0.97 (95%CI: 0.96-0.97, p<0.001), and PRS HR 0.99 (0.98-0.996, p=0.004).Patients relapsing before 2008 (prior to bortezomib funding) had shorter OS compared to those relapsing thereafter: median 61 vs 69 months, HR 1.38 (1.01-1.87, p=0.04). Depth of response (CR/VGPR) pre and post-ASCT were associated with longer PFS1- HR 0.70 (0.54-0.92, p=0.01), and HR 0.68(0.51-0.89, p=0.005) respectively, but not OS or PRS.248 patients (89.5%) received systemic salvage therapy at relapse;106 patients (38.3%) experienced biochemical IMWG progression rather than clinical relapse, with median time to treatment of 5 months (2-64). Salvage regimens included: proteasome inhibitors(PIs) (64.5%), immunomodulatory agents (IMiDs, 29.8%, thalidomide-63.5%, lenalidomide-36.5%) and chemotherapy 5.2%; 26.6% of patients entered clinical trials and 13.7% underwent salvage ASCT. ORR was 70.4% (sCR/CR 10.9%, VGPR 31.6%). Median 2nd PFS was 17 months (16-20) and median PFS2 overall was 39 months (35-41). Achieving a deeper response to salvage treatment (CR/VGPR) was associated with a longer 2nd PFS (21 vs 17 months for PR, HR 0.65, 0.46-0.91, p=0.01), with a trend for PRS, HR 0.89(0.59-1.34, p=0.58) and OS, HR 0.77(0.51-1.17, p=0.22).Novel agents induced deeper responses, CR/VGPR with PI regimens 51.3%, with IMiDs 30%, and with chemotherapy 8%. Patients treated with PIs compared to all other systemic treatment regimens had a significantly longer OS of 80 vs 48 months, HR 0.60(0.43-0.85, p= 0.004). Patients entered into clinical trials (66) had deeper responses, ≥VGPR 61% compared to 31% in non-trial patients, and longer PRS, 64 vs 35 months, HR 0.54 (0.36-0.81, p= 0.003) and OS 90 vs 57 months, HR 0.50 (0.33-0.76, p=0.001).Risk factors at relapse influenced outcomes. Higher ISS was associated with shorter PRS, ISS 2/3 27 vs 50 months for ISS1, HR 2.52(1.74-3.66, p<0.0001) and OS, 46 vs 82 months, HR 2.42(1.67-3.50, p<0.0001). Presence of adverse FISH at relapse (54.1% of 133 patients) also predicted shorter PRS (restricted mean survival time 40 vs 72 months, p<0.001) and OS, 59 vs 97 months for standard FISH, HR 0.46 (0.28-0.73, p=0.0011). Adverse FISH at diagnosis (25.5% of 157) also predicted poorer outcomes.Conclusions. This real-world series shows that timing of relapse, period of relapse (pre-2008), ISS Stage, adverse FISH, and response to salvage regimen influence survival after relapse from frontline ASCT. Use of novel regimens, particularly PIs as salvage therapy post ASCT is associated with longer OS. Our data confirm the importance of entering patients into clinical trials. Multivariable linear regression analyses will be presented. Lastly, the inferior outcomes for patients with high-risk features highlights the need to develop different treatment strategies in this patient subgroup. DisclosuresMaciocia:Autolus: Equity Ownership, Patents & Royalties: TRBC1 and 2 Targeting for the Diagnosis and Treatment of T-cell Malignancies. Yong:Janssen: Research Funding; Autolus Ltd: Equity Ownership, Patents & Royalties: APRIL based chimeric antigen receptor.

Early PSA response is an independent prognostic factor in patients with metastatic castration-resistant prostate cancer treated with next-generation androgen pathway inhibitors

BackgroundThe optimal use of new therapies in metastatic castration-resistant prostate cancer (mCRPC) remains to be clarified. Prostate-specific antigen (PSA) response used as a pharmacodynamic end-point may help identify patients with early resistance to new androgen receptor-pathway inhibitors. We aimed to determine the clinical significance of early PSA response (EPR) during therapy with enzalutamide, abiraterone acetate (AA) and orteronel in mCRPC. MethodsData from patients recruited in clinical trials were studied. PSA values were obtained at baseline and 28 d after treatment initiation. EPR defined as a decline >50% from baseline was calculated according to the Prostate Cancer Working Group 2 criteria. The effects of clinical characteristics on radiographic progression-free survival (rPFS) and overall survival (OS) were examined using the Cox model. ResultsEPR was assessed in 118 patients treated in clinical trials and was found to be associated with longer rPFS and OS (P < 0.0001 for both). Median rPFS was 13.9 and 5.6 months (hazard ratio [HR]:0.38, P < 0.001) for patients with and without an EPR, respectively. Median OS was 32.2 months in patients with an EPR and 15.9 months in patients without an EPR (HR: 0.4, P < 0.01). EPR remained prognostic for OS in multivariate analyses (HR: 0.5, p=0.009) that included validated pre-therapeutic prognostic factors for mCRPC. Prognostic values of EPR for rPFS and OS were confirmed in an independent cohort of 95 AA-treated non-trial patients. ConclusionsEPR is an independent prognostic factor in patients with mCRPC treated with next-generation androgen pathway inhibitors and may be useful for the therapeutic management of these patients.