Citations

Abstract Background: We had previously piloted thalidomide treatment in MMM and showed an approximately 20% response in terms of both anemia and splenomegaly (Elliott et al. BJH2002;117:288). Encouraged by this experience, we undertook the current phase II study to explore the therapeutic activity of the more potent as well as less neurotoxic immunomodulatory drug, lenalidomide (CC-5013). Methods: The study group comprised a consecutive series of patients with MMM that fulfilled protocol entry criteria that included hemoglobin level ≤ 10 g/dL, platelet count ≥ 100 x 109/L, and neutrophil count ≥ 1 x 109/L. The treatment program consisted of daily oral lenalidomide (10 mg/day) for 3 consecutive 28-day cycles with a plan to continue with additional 3 cycles in case of response. Results: i. Pretreatment patient information Twenty-seven patients (median age, 66 years; range, 40–78) were accrued between March 5, 2004 and June 15, 2005. Median duration of disease prior to protocol treatment was 30 months (range, 1–245). Previous therapy was documented in all but 2 patients. Twenty patients were RBC transfusion-dependent. Baseline median (range) values for palpable spleen size, leukocyte count, platelet count, CD34 cell count, and serum lactate dehydrogenase (LDH) were 16 cm (0–31), 8.4 x 109/L (1.8–84.4), 299 x 109/L (124–831), 166.1 x 106/L (2.8–5176.4), and 778 U/L (267–1725), respectively. Cytogenetic abnormalities were detected in 13 patients (48%). JAK2 V617F mutation analysis was performed in 21 patients and revealed homozygous, heterozygous, and wild-type alleles in 3, 8, and 10 patients, respectively. ii. Adverse events Adverse events (any/grade 3 or 4) with definite, probable, or possible attributions to the drug included fatigue (52%/12%), neutropenia (40%/24%), pruritus (36%/0%), thrombocytopenia (28%/8%), anemia (16%/8%), rash (12%/8%), and respiratory distress with hypoxia (8%/8%). To date, 7 deaths have been reported, all occuring after discontinuation of protocol therapy, and none were directly linked to the drug. iii. Response The median post-treatment follow up is now 16 months (range 1–17 months). During this period, 6 patients (22%) have experienced either a major (3 patients normalized their hemoglobin level), minor (2 patients became transfusion-independent), or marginal response in anemia. The median time to response and response duration were 2 and 7 months, respectively. Two of the 3 major responders had a baseline der(1;18)(q10;q10) or del(5)(q13q33) cytogenetic abnormality, the latter one of which displayed a major cytogenetic remission. In the patient with der(1;18)(q10;q10), the hemoglobin level increased to a level of 19.1 g/dL from being transfusion-dependent at the start of lenalidomide therapy. Interestingly, the particular patient was homozygous for the JAK2 V617F mutation. Responses were also recorded for palpable splenomegaly (26%), constitutional symptoms (67%), and serum LDH level (70%). Seven patients normalized their LDH. Conclusion: Lenalidomide therapy improved anemia in at least 20% of patients with MMM. Some of the responses were spectacular and appeared to be associated with specific cytogenetic abnormalities. The documentation of a positive drug effect on LDH, constitutional symptoms, and splenomegaly in patients not showing early response in anemia suggests the possibility of an even higher response rate with a longer treatment schedule.

Background: Nonrheumatic valvular diseases are common; however, no studies have estimated their global or national burden. As part of the Global Burden of Disease Study 2017, mortality, prevalence, and disability-adjusted life-years (DALYs) for calcific aortic valve disease (CAVD), degenerative mitral valve disease, and other nonrheumatic valvular diseases were estimated for 195 countries and territories from 1990 to 2017. Methods: Vital registration data, epidemiologic survey data, and administrative hospital data were used to estimate disease burden using the Global Burden of Disease Study modeling framework, which ensures comparability across locations. Geospatial statistical methods were used to estimate disease for all countries, because data on nonrheumatic valvular diseases are extremely limited for some regions of the world, such as Sub-Saharan Africa and South Asia. Results accounted for estimated level of disease severity as well as the estimated availability of valve repair or replacement procedures. DALYs and other measures of health-related burden were generated for both sexes and each 5-year age group, location, and year from 1990 to 2017. Results: Globally, CAVD and degenerative mitral valve disease caused 102 700 (95% uncertainty interval [UI], 82 700–107 900) and 35 700 (95% UI, 30 500–42 500) deaths, and 12.6 million (95% UI, 11.4 million–13.8 million) and 18.1 million (95% UI, 17.6 million–18.6 million) prevalent cases existed in 2017, respectively. A total of 2.5 million (95% UI, 2.3 million–2.8 million) DALYs were estimated as caused by nonrheumatic valvular diseases globally, representing 0.10% (95% UI, 0.09%–0.11%) of total lost health from all diseases in 2017. The number of DALYs increased for CAVD and degenerative mitral valve disease between 1990 and 2017 by 101% (95% UI, 79%–117%) and 35% (95% UI, 23%–47%), respectively. There is significant geographic variation in the prevalence, mortality rate, and overall burden of these diseases, with highest age-standardized DALY rates of CAVD estimated for high-income countries. Conclusions: These global and national estimates demonstrate that CAVD and degenerative mitral valve disease are important causes of disease burden among older adults. Efforts to clarify modifiable risk factors and improve access to valve interventions are necessary if progress is to be made toward reducing, and eventually eliminating, the burden of these highly treatable diseases.

Abstract Background: BRCA1/2 carriers have higher scores in the 21-gene RS assay compared to non-carriers. Little is known about the 21-gene RS patterns in women harboring germline mutations in genes outside BRCA1/2. Methods: We utilized the Mayo Clinic Breast Cancer Study Registry to identify individuals with non-metastatic estrogen receptor positive breast cancer and clinical 21-gene RS results available. We cross-referenced this with an institutional registry of patients tested for hereditary cancer genes, either from the electronic health record or from a research study conducted using a custom QIAseq multiplex amplicon-based panel (Qiagen). The latter assay covered target regions of all coding regions for the following predisposition genes: ATM, BARD1, BLM, BRCA1, BRCA2, BRIP1, CDH1, CDKN2A, CHEK2, ERCC2, FANCC, FANCM, MLH1, MRE11A, MSH2, MSH6, MUTYH, NBN, NF1, PALB2, PMS2, PTEN, RAD50, RAD51C, RAD51D, RECQL, PRSS1, STK11, TP53, and XRCC2. Student’s t-test was used to compare 21-gene RS between carriers, non-carriers, and specific carrier genes (JMP v 14.0). Results: 282 patients were identified with early stage breast cancer and 21-gene RS available, including 85 known mutation carriers and 197 non-carriers (or unknown carrier status). Germline mutations were identified in CHEK2 (n=25), BRCA2 (n=18), ATM (n=10), BRCA1 (n=5), PALB2 (n=5), TP53 (n=3), FANCM (n=2), MUTYH (n=2), PMS2 (n=2), PPM1D (n=2), RECQL (n=2), BARD1 (n=1), BLM (n=1), CDH1 (n=1), ERCC2 (n=1), FANCC (n=1), MSH6 (n=1), NBN (n=1), PRSS1 (n=1), and PTEN (n=1). In the entire cohort, the mean 21-gene RS was 20.4 in carriers and 18.0 in non-carriers (p=0.11). We performed individual analyses on specific genes identified in ≥ 5 patients (table 1). Compared to the mean RS in non-carriers (18.0), higher mean RS were observed in patients harboring BRCA1 (38.8, p=0.002), PALB2 (26.6, p=0.0724), and BRCA2 (23.2, p=0.0453). The RS in CHEK2 and ATM carriers were comparable to those of non-carriers. Conclusions: We observed differences in RS score distribution based on specific mutated breast cancer predisposition genes. Further validation of the distribution and performance of the 21-gene RS in germline carriers is needed. 21-gene RS scorenMedian RSMean≤1516-25≥26n%n%n%CHEK2251616.61248728624BRCA2182123.2211.11161.1527.8ATM101716.9330550220BRCA153635.8120120360PALB253326.6120120360None1971518.09950.367343115.7 Citation Format: Karthik V Giridhar, Grace M Choong, Siddartha Yadav, Eric C Polley, Roberto A Leon-Ferre, Minetta C Liu, Matthew P Goetz, Fergus J Couch. Distribution of the 21-gene recurrence score (RS) assay (Oncotype DX) in carriers of germline mutations associated with breast cancer predisposition syndromes [abstract]. In: Proceedings of the 2019 San Antonio Breast Cancer Symposium; 2019 Dec 10-14; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2020;80(4 Suppl):Abstract nr P5-03-07.

Abstract Introduction: CDK 4/6 inhibitors (CDK4/6i) are FDA approved for treatment of hormone receptor (HR) positive, HER2 negative metastatic breast cancer (MBC). Recent work demonstrated that a rise in MCV was correlated with longer median progression free survival (Anampa et al, Haemoatologica 2018). We performed a single-institution retrospective analysis to evaluate whether palbociclib induced early changes in MCV serve as a pharmacodynamic biomarker to predict response to CDK4/6i. Methods: We identified a retrospective cohort of 81 patients with HR+, HER2- MBC treated with CDK4/6i as first line metastatic treatment at Mayo Clinic, Rochester. Hematologic indices were abstracted pretreatment and at the start of each cycle through the start of cycle 4 (C4). Wilcoxon signed test was used to examine the changes in MCV (ΔMCV) comparing pretreatment up to C4 and ΔMCV between cycles. Optimal cut points for ΔMCV were determined using Cutoff finder (Budczies et al., PLOS One 2012). Cox proportional hazard regression analysis was performed to evaluate associations of MCV and time to treatment failure (TTF), which was defined as the time from the start of the analyzed cycle to treatment discontinuation for any reason(in months). As eight comparisons were made, a Bonferroni correction established p-value <0.00625 as the adequate cutoff for statistical significance. Statistical analyses were performed using JMP (SAS Institute Inc, Cary, NC). Results: 60/81 patients had pretreatment and at least one subsequent lab data point that included MCV. The pretreatment mean hemoglobin (Hgb) was 12.8 [standard deviation (SD) 1.37 g/dL] and 6/60 (10.2%) patients with Hgb <11.0 g/dL. Mean pretreatment MCV was 89.0 femtoliters/cell [fl (SD 4.63)] and no macrocytosis (defined as MCV >100 fl) was observed. At C4, the mean Hgb was 12.1 g/dL (SD 1.11) with 4/49 (8.2%) with Hgb <11.0 g/dL. The C4 mean MCV was 96.6 fl (SD 5.23) and 8/29 (16.3%) developed macrocytosis. Wilcoxon signed analysis showed a significant increase in ΔMCV pretreatment to C2 [n=51, median 1.5 with interquartile range (IQR) -0.1-3.2, p<0.0001], C2 to C3 (n=44, median 2.9, IQR 1.4-5.2, p<0.0001), and C3 to C4 (n=41, median 3.4, IQR 1.9-4.9, p<0.0001). A rise in MCV≥8.15 from pretreatment to C4 was associated with a non-statistically significant improvement in TTF [n=49, hazard ratio (HR) 0.38, p = 0.06]. Between C2 and C3, a rise in MCV ≥2.9 was associated favorably with TTF (n=44, HR 0.36, p = 0.029). The estimated probability of remaining on treatment at 30 months was higher in those with C2-C3 ΔMCV ≥2.9 [44.1%; 95% Confidence Interval (CI) 17.3-68.2%] compared to those with a C2-C3 ΔMCV <2.9 (10.1%; 95%CI 1.5-28.7%). Discussion: We observed an increase in MCV in all patients receiving CDK4/6i by start of C4. The rise in MCV during CDK4/6i treatment may reflect drug induced cell-cycle arrest in hematopoietic cells. Evaluation in larger studies is needed to validate dynamic changes in MCV as a predictive biomarker of response to CDK4/6i therapy. Citation Format: Grace Mei Yee Choong, Roberto A Leon-Ferre, Ciara C O'Sullivan, Kathyrn J Ruddy, Tufia C Haddad, Timothy J Hobday, Prema P Peethambaram, Charles L Loprinizi, Minetta C Liu, Vera J Suman, Matthew P Goetz, Karthik V Giridhar. Evaluation of mean corpuscular volume (MCV) as a pharmacodynamic predictive biomarker in patients receiving CDK4/6 inhibitors for metastatic breast cancer (MBC) [abstract]. In: Proceedings of the 2019 San Antonio Breast Cancer Symposium; 2019 Dec 10-14; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2020;80(4 Suppl):Abstract nr P1-19-42.

This article presents a clinical screening and referral framework to enable health care professionals to guide individuals with cancer to safe and effective exercise programs.

7509 Background: NTX-010 is a naturally occurring replication-competent picornavirus with potent and selective tropism for SCLC tumor cells expressing neuroendocrine markers. A phase I study of NTX-010 showed evidence of antitumor activity in patients with SCLC. Methods: ES-SCLC patients (pts) with SD, PR or CR after at least 4 cycles of platinum-based chemotherapy were pre-registered to confirm diagnosis of SCLC with > 1 neuroendocrine marker by a central pathology review. Eligible pts were.randomized 1:1 to placebo (B) or NTX-010 (A). NTX-010 or placebo was administered intravenously as a 1-hour infusion in 100 mL normal saline as a single dose of 1 x1011vp/kg. Viral studies to determine distribution, clearance of the virus and the presence of neutralizing antibodies were done. The primary goal of this trial was to compare the progression-free survival (PFS) of arm A to B based on a sample size of 45 patients per arm to detect an improvement in median PFS from 3 to 5 months (m). A pre-planned interim futility analysis was done after 40 PFS events, and reported here. Results: The trial is permanently closed to accrual. One-hundred and twenty pts were pre-registered, of whom 58 were randomized. Baseline age, gender, ECOG performance status, and histology were balanced between arms. Median age was 63 (range: 44 - 82). 31% of pts had a PS of 0 and 69% of 1. Grade 4 adverse events were seen in 3 (12.5%) patients in arm A and none in arm B. Based on the interim futility analysis, PFS was 1.7 m (95% CI: 1.3-3.1) for arm A and 1.7 m (95% CI: 1.4-4.3) for arm B. Pts with viral RNA at 7 (7 pts) and 14 (6 pts) days had worse PFS compared to those with no detectable levels within arm A (1.0 vs 1.6 m, p=0.02; 0.9 vs. 1.2 m, p=0.06). Median follow-up in pts is 6.1 m. The 3-month OS estimates are 83% (95% CI: 69%-100%) and 85% (70%-100%) for arms A and B respectively. Conclusions: This phase II study showed no benefit in PFS for ES-SCLC patients receiving NTX-010. Pts with detectable virus at 7 and 14 days had worse PFS. Clinical trial information: NCT01017601.

7605 Background: Overall survival (OS) can be partitioned into progression-free survival (PFS) and PPS. PPS helps to understand trial results, especially when PFS and OS data on trial treatment effects are discordant. At ASCO 2011, we reported that the magnitude of difference in the PFS estimates using different DP date methods was large enough to alter trial conclusions. Here, we investigate the impact of the DP date method on 1) PPS estimates, and 2) predictive utility of DP metrics on subsequent OS (SOS). Methods: Individual patient (pt) data from 14 trials were pooled. DP date was determined using: reported progression date (RPD) (method 1, M1), one day after last progression-free (PF) scan (M2), and midpoint between last PF scan and RPD (M3). PPS was estimated using the method of Kaplan-Meier for the 3 DP date methods. A flexible landmark analysis at 2, 4, and 6 months (mos) using Cox proportional hazards model was used to assess the impact of DP status (progression versus no-progression) on SOS (using M1, M2, or M3). Results: Among NSCLC (SCLC), 87% (91%) of pts reported DP. As expected, the PPS estimates were the lowest for RPD, highest for M2, and in-between for M3 (a direct consequence of the DP date method); with no difference by arm for the randomized trials. Regardless of the DP date method, patients who were progression-free had improved SOS (NSCLC: Hazard ratio, HR<=0.33; p < 0.0001; SCLC: HR<=0.48; p < 0.002) at each landmark time point, with comparable concordance index (SCLC: 0.57-0.65; NSCLC: 0.63-0.67), i.e., ability to discriminate patients with different SOS outcomes. Conclusions: While the DP date methods do not impact the predictive utility of the DP metrics, they significantly impact PPS estimates. The translation of a significant treatment effect on PFS to an effect on OS is influenced by PPS (longer PPS dilutes effect on OS). Standards for declaring DP date are thus critical to trial design and for trial go/no-go decisions. [Table: see text]

7555 Background: In a retrospective exploratory analysis of E4599, patients (pts) > 70 yo had a higher frequency of and more severe toxicities without apparent survival benefit from the addition of B to C+paclitaxel. We hypothesized that in this pt population, B will have better safety and efficacy profile when used in combination with C+P. Methods: Pts >/= 70 yo with previously untreated stage IIIB/IV (TNM 6th ed) nonsquamous NSCLC, ECOG PS 0-1, measurable disease and adequate organ function were eligible. C at AUC 6, P at 500 mg/m2 and B at 15 mg/kg were administered on day 1 of each 21-day cycle for up to 6 cycles followed by maintenance P+B in patients with CR, PR or SD. The primary endpoint was 6-month progression-free survival (PFS) rate. The treatment would be considered promising based on a single arm one-stage binomial design if 34 or more successes out of 55 patients were observed. This design had an exact significance level of 0.05 at 93% power to detect a true success rate of at least 70%. Polymorphisms in VEGFA, FPGS, GGH, SLC19A1 and TYMS in germline DNA were correlated with treatment outcome. Results: 58 eligible pts were enrolled; 29 males/29 females. Median age was 75. Median treatment cycles received was 6. Grade 3 or higher adverse events (AE) were reported in 49 (85%) pts. There were no treatment-related deaths. The most common grade 3/4 AEs(regardless of attribution) were hypertension (10%), fatigue (28%), dehydration (9%), neutropenia (43%) and thrombocytopenia (21%). There were 3 (5%) grade 3/4 hemorrhagic events. 8 (14%) had grade 4 neutropenia and 3 (5%) had grade 4 thrombocytopenia. Grade 3/4 ischemic/thromboembolic events occurred in 6 pts (10%). Thirty-four out of the first 54 (63%, 95% CI: 48.7-75.7%) evaluable pts met the primary endpoint (4 pts were lost to follow-up prior to 6 months). The confirmed ORR was 37.9% (95% CI: 25.5-51.6%). Median time to treatment failure was 4.8 months (95% CI: 3.9-6.4). Median PFS was 7.1 months (95% CI: 5.9-11.7), median OS was 13.7 months (95% CI: 9.4-15.7). Results of SNP analysis will be presented. Conclusions: C+P+B followed by maintenance P+B is an active and tolerable first-line regimen for elderly patients with good PS.

7073 Background: In preclinical studies, combinations of bortezomib and RT result in synergistic tumor killing (Cancer Chemother Pharmacol. 2007;59:207-15). Our group reported the results from the phase I portion of this study previously (J Clin Oncol. 200;28 (suppl; abstr 7085)). Based on these data, we undertook a phase II study of bortezomib in combination with paclitaxel/CBCDA and RT. Methods: Based on results from our previously reported phase I trial, systemic therapy included bortezomib (1.2 mg/m² IV days 1,4,8,11), paclitaxel (175 mg/m² IV day 2), and carboplatin (CBCDA; AUC=6 day 2) given every 3 weeks for 2 cycles. Thoracic radiotherapy (RT) included 60Gy/30 daily fractions starting day 1. The primary endpoint was the 12-month survival rate. If 41 or more of these 60 patients (68%) were alive at least 12 months after study entry, the trial would be deemed as positive and further study would be warranted. Results: 27 pts were enrolled to the phase II portion: M/F=17/10; stage IIIA/IIIB=13/14; ECOG PS 0/1=9/18; and median age: 58 (range 43-79). 18 pts (67%) completed therapy per protocol. At a planned interim analysis, 23 of 26 evaluable patients (88.5%, 95% CI: 70-98%) survived for at least 6 months, which exceeded the boundary of 21 or more needed to continue to full accrual. This trial could have continued per protocol, but was closed early due to slow accrual. With a median follow-up of 15.0 months in the 17 patients still alive, the 12-month survival rate was 71% (95% CI: 49 – 85). The median OS was 19 months (95% CI: 11 – no upper). Grade 3 or higher adverse events (regardless of attribution) were reported in 22 (82%) patients. Grade 4/5 adverse events were reported in 15 (56%) patients. There was one grade 5 event (pneumonitis). The most common (5 or more patients) grade 3/4 adverse events were fatigue (22%), leukopenia (63%), neutropenia (67%), and thrombocytopenia (44%). Conclusions: The addition of bortezomib resulted in high levels of severe hematologic toxicity, but also demonstrated evidence of activity with a 12-month survival rate of 71% and a median OS of 19 months. Further testing of this regimen in a larger study appears warranted.