Phase I/II study of GM-CSF gene-transduced allogeneic prostate cancer cellular immunotherapy (GVAX IT) in advanced prostate cancer patients made lymphopenic by chemotherapy and infused with autologous peripheral blood mononuclear cells (MC)

2006 ◽  
Vol 24 (18_suppl) ◽  
pp. 14635-14635 ◽  
Author(s):  
B. D. Curti ◽  
I. Assman ◽  
T. Moudgil ◽  
T. Ratzow ◽  
D. Haley ◽  
...  

14635 Background: GVAX IT has been tested in phase I/ II and is currently being tested in phase III clinical trials of patients (pts) with androgen-independent prostate carcinoma (AIPC). Immunological and PSA responses have been described in men receiving GVAX IT. Preclinical studies have shown that antitumor immune responses induced by GVAX IT could be augmented further by making animals lymphopenic and reconstituting with lymphocytes prior to vaccination. A clinical trial was designed to study the effects of lymphopenic reconstitution in pts with AIPC. Methods: All pts had MC collection by leukapheresis pre-treatment. Study groups were as follows: Arm A - GVAX IT given every two weeks for 6 months; Arm B - Cyclophosphamide (350 mg/m2 IV on days 1–3), MC infusion on day 6, GVAX IT on day 7, then every 2 weeks for 6 months; Arm C - Cyclophosphamide (350 mg/m2 IV on days 1–3) and fludarabine (20 mg/m2 IV on days 1–3), MC infusion on day 6, GVAX IT on day 7, then every 2 weeks for 6 months. Results: Seven pts have been treated thus far and completed at least 2 GVAX IT treatments. Pts had ECOG performance status ≤ 1, castrate testosterone levels, ≤ 1 prior chemotherapy regimen and measurable or evaluable metastatic AIPC. Lymphopenia was induced in all pts enrolled in Arms B and C, with recovery of total granulocytes and lymphocytes within 4 weeks following treatment. Monitoring of humoral and cellular immunological responses is underway and shall be presented. Conclusions: GVAX IT and lymphopenic reconstitution is feasible in men with AIPC. Analysis of clinical and immune response is ongoing. Supported by DAMD grant PC020094 and generous support of Mr. Tom Denhart, the Chiles Foundation and the Murdock Trust. [Table: see text]

2006 ◽  
Vol 24 (18_suppl) ◽  
pp. 13029-13029
Author(s):  
E. Gallerani ◽  
S. Cresta ◽  
D. Tosi ◽  
C. Sessa ◽  
G. Capri ◽  
...  

13029 Background: Proteasome inhibition blocks the chemotherapy-induced activation of NF-кB increasing chemosensitivity to anticancer agents due to increased apoptosis. NF-кB is frequently aberrantly activated in primary human carcinomas and over-expressed in aggressive breast cancer lines1 supporting the rationale for combining B with P. We designed a phase I-II and PD trial to determine the recommended dose (RD) of the B&P combination, to screen for antitumor activity in patients with potentially taxane-sensitive tumors, to search for drug-induced changes and to identify potential surrogate markers of drug activity and toxicity in peripheral blood mononuclear cells (PBMC). Methods: Eligibility included ECOG performance status < 2, neurotoxicity < 2 and adequate organ functions. Treatment was given Q21 days: B on days 1,4, 8 and 11 and P on days 1 and 8. PBMC for gene expression profiling have been collected on day 1 and 4 before and after therapy. RECIST for response was applied. Results: Twenty-nine patients (20 female, median age 60 yrs) were accrued and 25 are evaluable (breast cancer: 13, ovarian cancer: 7, prostate cancer 1, other 4) ; 16 pts were treated in 4 escalation levels and the RD defined respectively at 1.3 mg/m2/dose & 100 mg/m2/dose for B&P. Neurotoxicity was the main toxicity (G1 36%, G2 20% and 1 case G3) requiring treatment discontinuation in 2 pts at cy 6 & 7. Other toxicities (all grades) were nausea and vomiting (68%), diarrhea (56%, G3 12%), alopecia (52%), asthenia (36%, G2 4%), and myalgia (32%, G2 8%). Antitumor activity consisted of 3 PR in pts with ovarian cancer lasting respectively 14, 8+ and 16 wks; 2 PRs in pts with breast cancer (12+ wks,14+ wks) and 1 PR in a pt with prostate cancer. Conclusions: Thus far the regimen has acceptable toxicity with evidence of antitumor activity. The trial will continue until accrual of four additional patients as planned. Footnotes 1 Adams J Current Opin Oncol 2002, 14:628–634. [Table: see text]


2012 ◽  
Vol 30 (15_suppl) ◽  
pp. e13071-e13071
Author(s):  
Jamal Anono Khan

e13071^ Background: Pancreatic cancer is the leading cause of cancer deaths worldwide with a very poor survival rate. No adequate therapy allows the patient to have a longer life of even 1 year. Methods: Dendritic cell(DC) based immunotherapy along with gemcitabine chemotherapy is planned to do phase I/II trial in 26 patients of advanced stage adenocarcinoma of pancreas. Inclusion criteria was defined as unresectable disease, ECOG performance status of not more than 2, Blood chemistry and hematocrit within normal range and of all age groups. Peripheral blood mononuclear cells are cultured in GM-CSF/IL-4 in RPMI. At 6th day of culture, the immature dendritic cells are exposed to antigens previously isolated from fresh excised tissue and further matured for 2 days. The cells along with medium are harvested and 1 million mature DC are infused IV by mixing them in 100 ml of dextrose normal saline with ondasnetron 4mg injection. Gemcitabine was given on day 1 and on day 8th and DC on day 15th. The cycle is repeated every month for 3 months followed by DC therapy alone at every 23 days interval till patient survives. The primary end point was overall survival and the secondary end point was improvement in quality quotient. Results: 6 patients survived for 24 months, 10 for 12 months and 3 for 6 months, with radiological improvement in only 4 patients with 25% reduction of disease. The quality quotient of 14 patients improved by second dose of dc therapy with improved appetite and decreased pain in abdomen including cheerfulness in 13 patients. Conclusions: Gemcitabine and DC immunotherapy is a good option for advanced stage pancreas cancer patients.


Blood ◽  
2013 ◽  
Vol 122 (21) ◽  
pp. 1554-1554 ◽  
Author(s):  
Guillermo Garcia -Manero ◽  
Michael Savona ◽  
Steven D. Gore ◽  
Christopher R. Cogle ◽  
Paul Conkling ◽  
...  

Abstract Background Subcutaneous (SC) azacitidine prolongs overall survival in subjects with higher-risk MDS (Fenaux, JCO, 2009). Previous Phase I and II studies have shown extended oral azacitidine dosing schedules to be safe and effective in subjects with IPSS-defined lower-risk MDS (Garcia-Manero et al, ASH 2010 and ASH 2012). Objective To assess the efficacy and safety of extended oral azacitidine dosing schedules in subjects with WHO-defined RAEB-1 or RAEB-2 MDS. Methods The subset of subjects with WHO-defined RAEB-1 or RAEB-2 MDS from two ongoing Phase I/II studies was included in this ad hoc analysis. Subjects received oral azacitidine 300mg QD or 200mg BID for 14 or 21 days of repeated 28-day cycles. For purposes of this analysis, subject data were analyzed collectively. Hematologic responses were defined by International Working Group (IWG) 2006 criteria. Overall Response was calculated as any response of complete or partial remission (CR or PR), RBC or platelet transfusion independence (TI), and/or any hematologic improvement (HI). Marrow complete remission (mCR) was not included in Overall Response. Serious treatment-emergent adverse events (STEAEs) that occurred in 2 or more subjects are reported. Results Of 23 subjects in all, 20 received 300mg QD oral azacitidine x 14 or 21 days/28-day cycle and 3 received oral azacitidine 200mg BID x 14 days/28-day cycle. Subjects had median age of 71 (range: 36 - 90) years and were predominantly male (61%). Fourteen subjects (61%) had a diagnosis of RAEB-1 and 9 (39%) had RAEB-2, median time from diagnosis was 2.1 (0.1 - 33.2) months, and ECOG performance status scores were 0 (n=4, 17%), 1 (n=15, 65%), or 2 (n=4, 17%). Five subjects had received prior MDS treatments (azacitidine injection; erythropoiesis stimulating agent [ESA]; thalidomide; azacitidine injection and decitabine; G-CSF, anti-thymocyte globulin, methylprednisolone, cyclosporine, and ESA). Median number of oral azacitidine treatment cycles was 3 (1 - 29). Overall Response was achieved by 11/22 subjects (50%) (Table). Four subjects achieved mCR only and are not included in the Overall Response category. RBC TI was achieved by 5/12 subjects (42%) and platelet TI was achieved by 2/5 subjects (40%). Two subjects were able to consolidate remission and proceed to allogeneic stem cell transplant and 1 subject progressed to AML on-study. Oral azacitidine was generally well tolerated. Three subjects discontinued treatment due to an AE. STEAEs were consistent with the known safety profile of SC azacitidine. Of 8 subjects who had an STEAE of febrile neutropenia, pneumonia, and/or septic shock, 3 were severely neutropenic (ANC <0.5 x 109/L) at baseline. Other STEAEs were diarrhea, nausea, and vomiting (n=2 subjects each). Conclusions This analysis in subjects with RAEB-1 and RAEB-2 is the first to assess extended oral azacitidine dosing schedules in higher-risk MDS. One-half of treated subjects achieved a hematologic response to oral azacitidine, which is easy to administer and was generally well-tolerated. Two Phase III studies of extended oral azacitidine dosing (in lower-risk MDS and as maintenance therapy in older patients with AML) are ongoing. Results of these large studies will better elucidate the use of extended oral azacitidine dosing schedules in treating hematologic malignancies. Disclosures: Gore: Celgene Corporation: Consultancy. Cogle:Celgene Corporation: Honoraria, Research Funding. Conkling:US Oncology: Research Funding. Beach:Celgene Corporation: Employment. Hetzer:Celgene Corporation: Employment. Dong:Celgene Corporation: Employment. Skikne:Celgene Corporation: Employment.


2013 ◽  
Vol 31 (15_suppl) ◽  
pp. 5066-5066
Author(s):  
Mark T. Fleming ◽  
Dana E. Rathkopf ◽  
Jackie Gibbons ◽  
Amy C. Peterson ◽  
Alison Hannah ◽  
...  

5066 Background: Enzalutamide (ENZA) is a novel androgen receptor (AR) inhibitor that prolongs survival in men with metastatic castration-resistant prostate cancer (mCRPC) who had received prior docetaxel (DOC). DOC also prolongs survival in mCRPC and also appears to have anti-tumor effects mediated through the androgen-receptor axis, providing a compelling rationale for combining the two agents. CYP3A4 plays a role in DOC clearance and is induced by ENZA. We therefore conducted a phase I study to explore the PK and safety profiles of this combination. Methods: This study (NCT01565928) evaluated the safety and pharmacokinetics (PK) of DOC co-administered with ENZA in men with mCRPC on androgen deprivation therapy. Pts received DOC (75 mg/m2) by 1-h infusion every 3 weeks with corticosteroids. ENZA (160 mg/d) was started 24 h after the first DOC infusion. Plasma PK samples were collected for 24 h after Cycle (C) 1 and C2 DOC infusions to enable within-subject comparisons of DOC PK ± ENZA. A sample size of 18 pts able to receive ≥ 2 full doses of DOC was specified for PK analyses. Results: Twenty-two pts were enrolled, 4 did not receive 2 full doses of DOC. As of 21 Sept 2012, preliminary PK and C1 and C2 safety data were available from 15 pts. The median age was 65 (range 46-80 yrs); 11 had ECOG performance status 1 (vs 0). Prior primary therapy included surgery (n=2), radiation (n=4) or both (n=5); median PSA was 44.7ng/mL (1.9-585). ANC<1000/mm3 was reported in 14 pts (1 febrile neutropenia), other adverse events in ≥4 pts included fatigue (11), dyspnea (6), alopecia (5), peripheral neuropathy (5), anemia (4) and dysgueusia (4). No seizures were reported. Preliminary PK data (n=15) show similar DOC exposure (within 20%) for DOC in combination with ENZA vs. DOC alone.Final PK and updated tolerability and efficacy data beyond Cycle 2 will be presented. Conclusions: In mCRPC pts, ENZA does not appear to affect tolerability of DOC or have a clinically meaningful impact on DOC PK. Clinical trial information: NCT01565928.


2013 ◽  
Vol 31 (15_suppl) ◽  
pp. e13518-e13518 ◽  
Author(s):  
Mohamad Adham Salkeni ◽  
Olivier Rixe ◽  
Nagla Abdel Karim ◽  
Sue Ogara ◽  
Monica Feiler ◽  
...  

e13518 Background: The mammalian target of rapamycin (mTOR) is a critical signaling pathway in many tumors including cancers of the breast and colon, glioblastoma multiforme, and hepatocellular carcinoma (HCC). Preclinical studies demonstrated the combination of BEZ235, a competitive dual phosphatidylinositide 3-kinase (PI3K)/mTOR inhibitor, and the mTOR inhibitor, everolimus led to greater regression of a carcinogen-induced HCC than treatment with higher doses of either drug alone. Based on this, we initiated a study of BEZ235 combined with everolimus in patients with advanced solid tumors. Methods: A single institution phase Ib dose-escalation study. Patients with advanced solid malignancies, no available standard of care treatment option, and ECOG performance status 0-2 were eligible. Prior treatment with PI3K inhibitors was not allowed. Sequential cohorts of 3-6 patients were treated. The starting dose was everolimus 2.5 mg and BEZ235 200 mg daily in an oral sachet formulation. Cohort 2 received everolimus 2.5 mg and BEZ235 400 mg daily. Pharmacokinetic and pharmacodynamic studies were performed during the first cycle. The phosphorylation of specific downstream effectors of the mTOR pathway was assessed in peripheral blood mononuclear cells (PBMC). Results: Eleven patients, median age 58 (36-73 years) were treated. Tumors included non-small cell lung cancer, colon cancer, and glioblastoma, hepatocellular carcinoma, pancreatic cancer, esophageal cancer, adenoid cystic carcinoma of the larynx, and appendiceal carcinoma. Four patients were treated on cohort 1. None experienced dose-limiting toxicity. Seven patients were treated on the second dose cohort. One patient withdrew necessitating replacement and another developed grade 3 stomatitis from herpes virus requiring cohort expansion. The most common adverse events were thrombocytopenia, lymphopenia, transaminitis, diarrhea, nausea and fatigue. No tumor responses were noted. PBMC showed a decrease in 4E-BP1S65 phosphorylation on day 28 in 2 of 3 patients in cohort 1. Conclusions: The combination of BEZ235 and everolimus was well tolerated at these doses. The trial remains open to accrual. Clinical trial information: NCT01508104.


2013 ◽  
Vol 31 (6_suppl) ◽  
pp. 63-63 ◽  
Author(s):  
Mark T. Fleming ◽  
Dana E. Rathkopf ◽  
Jackie Gibbons ◽  
Amy C. Peterson ◽  
Alison Hannah ◽  
...  

63 Background: Enzalutamide (ENZA), a novel oral androgen receptor (AR) inhibitor, inhibits AR signaling via inhibition of androgen binding to the AR, AR nuclear translocation, and nuclear AR-DNA binding. ENZA demonstrated a survival benefit in men with metastatic castration-resistant prostate cancer (mCRPC) who had received prior docetaxel (Scher et al, NEJM 2012; 367:1187). A Phase III study in men with progressive chemotherapy-naïve disease (PREVAIL), is ongoing. Docetaxel (DOC) is the current standard first-line chemotherapy for mCRPC. CYP3A4, which plays a role in DOC clearance, is induced by ENZA. Patients (pts) eligible to receive DOC may benefit from continued AR inhibition with ENZA, provided the combination is well tolerated with no unacceptable drug-drug interactions. Methods: This study evaluated the safety and pharmacokinetics (PK) of DOC co-administered with ENZA in men with mCRPC on androgen deprivation therapy. Pts received DOC (75 mg/m2) by 1-h infusion every 3 weeks, with corticosteroids. ENZA (160 mg/d) was started 24 h after the first DOC infusion. Plasma PK samples were collected for 24 h after Cycle (C) 1 and C2 DOC infusions to enable within-subject comparisons of DOC PK ± ENZA. A sample size of 18 pts able to receive ≥ 2 full doses of DOC was specified for PK analyses. Results: As of 21 Sept. 2012, 22 pts have been enrolled, 3 did not complete both C1 and C2; PK and C1 and C2 safety data are currently available from 15 pts reported here. The median age was 65 (range 46-80 yrs); 11 had ECOG performance status 1 (vs 0). Prior primary therapy included surgery (n=2), radiation (n=4) or both (n=5); median PSA was 44.7ng/mL (1.9-585). ANC<1000mm3 was reported in 14 pts (1 febrile neutropenia), other adverse events in ≥4 pts included fatigue (11), dyspnea (6), alopecia (5), peripheral neuropathy (5), anemia (4) and dysgueusia (4). No seizures were reported. Preliminary PK data (n=15) show similar DOC exposure (within 20%) for DOC in combination with ENZA vs. DOC alone. Conclusions: This is the first evaluation of ENZA given in combination with DOC.In mCRPC pts ENZA does not appear to affect tolerability of DOC or have a clinically meaningful impact on DOC PK. Clinical trial information: NCT01565928.


2013 ◽  
Vol 31 (15_suppl) ◽  
pp. 5055-5055 ◽  
Author(s):  
Zafar I. Malik ◽  
Giuseppe Di Lorenzo ◽  
Mert Basaran ◽  
Alexandros Ardavanis ◽  
Phillip Parente ◽  
...  

5055 Background: Cbz + P provides a significant survival benefit vs mitoxantrone + P in pts with mCRPC (Phase III TROPIC study [NCT00417079]; hazard ratio 0.70; p < 0.0001). These findings supported the initiation of ongoing Sanofi-funded CUP and EAP (NCT01254279) to provide access to Cbz prior to commercialization and to collect real-life safety data. Methods: Expected enrollment is ~1600 pts with mCRPC from 250 centers worldwide. Pts receive Cbz (25 mg/m2 Q3W) + P (10 mg oral QD) until progressive disease (PD), death, unacceptable toxicity, physician/pt decision or Cbz commercial availability. Pts are followed until 30 days after last dose. Granulocyte colony-stimulating factor (G-CSF) use is recommended as per ASCO guidance. Results: Interim baseline and safety data from the first 1301 pts treated in 37 countries are now available. Mean age was 68 yrs (22% were ≥ 75 yrs). All pts had an ECOG performance status ≤ 2. Median time from initial prostate cancer diagnosis was 57.6 months and 60% of pts had ≥ 2 metastatic sites; the most common were bone (91%) and lymph nodes (regional 30%, distant 27%). In total, 17% had PD whilst on docetaxel. The median number of Cbz cycles was 6 (range 1–22); median relative dose intensity was 99%. Overall, 837 pts (64%) received G-CSF (n = 123 curative [C], n = 765 prophylactic [P] and n = 99 [C + P]). Of 1142 pts (88%) who discontinued Cbz + P, the most common reasons were PD (44%), adverse event (AE; 27%), physician decision (13%) and commercial availability of Cbz (7%). Grade 3–4 AEs possibly related to Cbz + P occurred in 43% of pts; the most frequent were clinical neutropenia (18%), febrile neutropenia (FN; 7%) and diarrhea (4%). Of 80 pts (6%) with AEs leading to death, the AE was related to Cbz + P in 39 pts (3%). Conclusions: These results provide valuable data on Cbz + P treatment in routine clinical practice, confirming the safety results of clinical trials and showing that treatment with Cbz + P is associated with a manageable safety profile. The incidence of FN seems slightly lower than in TROPIC, owing to more frequent use of G-CSF prophylaxis in the CUP and EAP. Clinical trial information: NCT01254279.


2019 ◽  
Vol 37 (7_suppl) ◽  
pp. 222-222
Author(s):  
Kelvin A. Moses ◽  
Scott C. Flanders ◽  
Matthew Harmon ◽  
Nancy N. Chang ◽  
Walter Rayford ◽  
...  

222 Background: AA men often present with more aggressive prostate cancer and are less likely to receive treatment, negatively affecting quality-of-life and overall survival (OS). Sipuleucel-T is an autologous cellular immunotherapy approved for asymptomatic or minimally symptomatic mCRPC. Data from the PROCEED registry showed that OS for AA pts treated with SIP-T was 9.3 mo longer than OS for Caucasian pts. In a prior subgroup analysis of Phase III data, AA pts realized a 30.7-mo difference in OS with SIP-T vs. placebo (PBO). We calculated the NNTB to further interpret the OS benefit in AA pts. Methods: Data were pooled from 3 Phase III mCRPC SIP-T trials (D9901, D9902A, and IMPACT). The absolute risk reduction (ARR) is calculated from Kaplan-Meier estimates at 12-, 24-, and 36-mo for all SIP-T subjects, and an AA cohort, receiving ≥1 infusion. NNTB, the inverse of the ARR, represents the number of pts needed to be treated with SIP-T to prevent 1 additional death compared to PBO. All NNTB values are rounded up. Results: Of the 737 pooled mCRPC pts enrolled, 488 men were randomized to SIP-T (n=33 AA), and 249 to PBO. Baseline clinical characteristics between the SIP-T and PBO groups were well balanced; however, compared to overall SIP-T and PBO, AA SIP-T pts were more likely to have received prior chemotherapy, lower hemoglobin, and better performance status. The NNTB at 12-mo was the same (13) for both the pooled SIP-T and AA treated cohort. At 24-mo, the NNTB values were 10 for pooled and 5 for AA. At 36-mo, an NNTB of 8 (pooled) and 3 (AA) SIP-T treatments prevented 1 additional death (Table). Conclusions: This NNTB analysis shows a favorable survival benefit for AA men treated with SIP-T and all treated SIP-T subjects. NNTB values declined over 3-years, suggesting durability of clinical benefit with SIP-T, and that it may address a known survival disparity in AA with prostate cancer. Studies with larger sample sizes may confirm if AA pts derive a greater OS benefit from SIP-T. Clinical trial information: NCT00065442. [Table: see text]


2007 ◽  
Vol 25 (18_suppl) ◽  
pp. 9118-9118
Author(s):  
Y. Arai ◽  
K. Kobayashi ◽  
Y. Takeuchi ◽  
Y. Nakajima ◽  
Y. Shioyama ◽  
...  

9118 Backgrounds: This multi-center prospective study was conducted to evaluate the safety and efficacy of PVP, a new treatment modality for PMVCF, using techniques of interventional radiology. Methods: Enrolled patients (pts) had PMVCF by primary or metastatic tumor; restricted activities by PMVCF; tumor not exposed into spinal canal; adequate hematologic, hepatic, renal and cardiac functions; 0–3 ECOG performance status (PS); estimated prognosis over 4 weeks; and written consent. In phase I, 9 pts were enrolled; in phase II, 24 pts. Safety and efficacy were evaluated by NCI-CTC Ver. 2 and Visual Analogue Scale (VAS) at week 1 after PVP, respectively. By VAS score decreases, efficacy was classified into significantly effective (SE: =5 or reached 0–2), moderately effective (ME: 2–4), or not effective (NE: <2 or increase). Response rate was the ratio of pts with SE or ME in total pts. PVP was performed by insertion of 14–16 G bone biopsy needle into fractured vertebral body (FVB) using fluoroscopy or CT guidance, injection of bone cement (BC) under real time imaging observation, and discontinuation of BC injection at its distribution to adequate area of FVB or into extra bone space. Results: Procedures were completed in all 33 patients with 42 PMVCF. PS of pts was 0 in 1, 1 in 7, 2 in 12 and 3 in 13. In 30 days after PVP, 2 patients died of primary disease progression, but no major adverse reaction (>Grade 2) was observed. Response rate was 73% (56–85% in 95% CI) (61% (n=20) with SE; 12% (n=4) with ME; 27% (n=9) with NE), and increased to 83% at week 4. Median to PVP effect was 1 day (mean: 2.4). Median pain controlled survival was 73 days. Conclusion: For PMVCF, PVP is a safe and effective treatment modality with immediate responses. A phase III trial comparing PVP and standard radiation therapy is planned to evaluate PVP as the front line treatment. No significant financial relationships to disclose.


2013 ◽  
Vol 31 (6_suppl) ◽  
pp. 7-7 ◽  
Author(s):  
Matthew Raymond Smith ◽  
Emmanuel S. Antonarakis ◽  
Charles J. Ryan ◽  
William R. Berry ◽  
Neal Shore ◽  
...  

7 Background: ARN-509 is a novel second-generation anti-androgen that binds directly to the ligand-binding domain of the androgen receptor, impairing nuclear translocation and DNA binding. The Phase II portion of a multicenter Phase I/II study is evaluating the activity of ARN-509 in 3 distinct patient populations of men with CRPC (high risk non-metastatic CRPC, metastatic treatment-naïve CRPC, and progressive disease after abiraterone acetate). Preliminary results for the cohort of patients with high-risk non-metastatic CRPC are presented here. Methods: All patients had CRPC, no radiographic evidence of metastases (pelvic lymph nodes <3 cm below the iliac bifurcation were allowed), and high risk for disease progression based on PSA value ≥ 8 ng/mL within 3 months of enrollment and/or PSA doubling time ≤ 10 months. Patients received ARN-509 at the recommended Phase II dose of 240 mg/day, previously established in Phase I (Rathkopf et al, GU ASCO 2012). The primary endpoint was PSA response rate at 12 weeks according to the Prostate Cancer Working Group 2 Criteria. Secondary endpoints included safety, time to PSA progression and 1-year metastasis-free survival. PSA assessments were collected every 4 weeks and tumor scans were performed every 16 weeks. Results: Forty-seven patients were enrolled between November 2011 and May 2012. The median age was 71 years (range 51 to 88) and at baseline, patients presented with ECOG performance status 0 (77%), Gleason Score 8-10 (32%), and median PSA of 10.7 ng/mL. All patients received prior treatment with a LHRH analog with or without a first-generation anti-androgen. At a median treatment duration of 20 weeks, three patients discontinued the study. The most common treatment-related adverse events (AE) were fatigue (30%), diarrhea (28%), nausea (17%), rash (13%), and abdominal pain (11%). The incidence of Grade 3 AEs was 6.4%, and no seizures have been observed to date. The 12-week PSA response was 91% and the time to PSA progression has not been reached. Conclusions: In men with high-risk non-metastatic CRPC, ARN-509 is safe and well tolerated with promising preliminary activity based on high PSA response rates. Clinical trial information: NCT01171898.


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