Design of a phase I clinical trial with PNT2258, a novel DNA interference oligonucleotide (DNAi), in patients with advanced solid tumors.

2012 ◽  
Vol 30 (15_suppl) ◽  
pp. TPS3110-TPS3110
Author(s):  
Drew Warren Rasco ◽  
Anthony W. Tolcher ◽  
Amita Patnaik ◽  
Kyriakos P. Papadopoulos ◽  
Alex Amaya ◽  
...  
Keyword(s):  
Phase I ◽  
Solid Tumors ◽  
Dose Level ◽  
Dose Escalation ◽  
Mononuclear Cells ◽  
Drug Product ◽  
Single Agent ◽  
Upstream Region ◽  
Advanced Solid Tumors ◽  
Phase Ii Studies

TPS3110 Background: With the knowledge that Bcl-2 facilitates drug resistance and cell survival, a DNA interference (DNAi) strategy was applied to silence Bcl-2 in cancer cells and promote apoptosis. DNAi differs from cytoplasmic mRNA targeting (antisense, RNAi, and miRNA targets) as it targets genomic DNA, blocking transcription. PNT100, a first in class DNAi, is a novel single-stranded 24-base unmodified DNA designed to bind to an upstream region of the Bcl-2 promoter. The drug product (PNT2258) is PNT100 encapsulated in a specialized pH tunable liposome and is being assessed for safety and tolerability in a phase I trial. PNT2258 avoids the toxicities associated with modified oligonucleotides and double-stranded RNAs; since the liposome formulation is anionic and contains no surface spacers, vehicle toxicities are minimal. Xenograft experiments demonstrated marked single agent activity in a diffuse large cell lymphoma, and therapy potentiation when combined with either rituximab in Daudi-Burkitt’s Lymphoma or docetaxel in A375 melanoma. Methods: An open-label, single-arm, first-in-man phase I dose-escalation study of PNT2258 in patients with advanced solid tumors was designed to evaluate safety, tolerability, dose-limiting toxicities, pharmacokinetics, and pharmacodynamics of PNT2258 to recommend a dose for phase II studies. In this phase I study, pharmacodynamic effects of PNT2258 will be evaluated through analyses of soluble serum and plasma markers and peripheral blood mononuclear cells. Patients will receive PNT2258 as an intravenous infusion over 2 hours once daily for 5 consecutive days (days 1-5) of each 21-day treatment cycle (3 weeks). The starting dose of 1 mg/m2 with PNT2258 administered to one patient per cohort and dose-escalation will proceed by dose-doubling in each successive cohort until a dose level of 64 mg/m2 is attained, provided no dose-limiting toxicities are observed in cycle 1. Thereafter, dose escalations shall proceed at 33% increments of the previous cohort dose-level to 85, 113, and 150 mg/m2 with expansions of up to six patients per cohort as needed. The ten planned dose cohorts have been completed with all patients enrolled.

Pooled analysis of phase I dose-escalation and dose cohort expansion studies of IMP4297, a novel PARP inhibitor, in Chinese and Australian patients with advanced solid tumors.

2019 ◽  
Vol 37 (15_suppl) ◽  
pp. 3059-3059 ◽  
Author(s):  
Junning Cao ◽  
Pin Zhang ◽  
Paul L. de Souza ◽  
Bo Gao ◽  
Mark Voskoboynik ◽  
...  
Keyword(s):  
Phase I ◽  
Solid Tumors ◽  
Dose Level ◽  
Dose Escalation ◽  
Single Agent ◽  
Response To Treatment ◽  
Clinical Activity ◽  
Dose Cohort ◽  
Phase Ii Studies ◽  
Grade 3

3059 Background: Poly (ADP-ribose) polymerase (PARP) enzymes play critical roles in DNA damage detection and repair. IMP4297 is a novel, potent PARP1/2 inhibitor (IC50 6.27nM/1.57nM) and has demonstrated to be 20-fold more potent than Olaparib in anticancer animal models. Two phase I studies were performed to evaluate and characterize the tolerability and safety, pharmacokinetics, and antitumor activity of single agent IMP4297 in Chinese and Australian patients with advanced ovarian, breast, prostate and other solid tumors. Methods: Dose escalation used a 3+3 design with a modified Fibonacci escalation. Dose cohort expansion was planned after efficacy was observed at the lowest dose level. Patients received IMP4297 monotherapy orally once a day until disease progression or unacceptable toxicity. Results: As of Jan 12, 2019, 56 patients, including 23 BRCA mutation carriers (BRCA+), had been enrolled at 2-100 mg dose level. No DLT was observed. In these two studies, the most frequent treatment-related adverse events (TRAEs) were leukopenia (20%), followed by anemia (18%), nausea (18%) and thrombocytopenia (14%). The majority of TRAEs were grade 1 or 2. Grade 3 TRAEs occurred in five patients (anemia, n=2; vomiting, n=1; thrombocytopenia, n=1; elevated AST, n=1). Only one patient had a dose reduction due to grade 3 thrombocytopenia. No serious TRAEs were observed. In 15 BRCA+ patients who had measurable lesions, the ORR was 33% and the DCR was 80%. There were 4 BRCA+, platinum-sensitive ovarian cancer patients with an ORR of 75% and a DCR of 100%. One patient with somatic BRCA mutated urothelial carcinoma showed a 76% decrease in tumor size. Conclusions: IMP4297 has been well-tolerated with significant anti-tumor activity. The 100 mg daily dose was selected as the RP2D based on safety, pharmacokinetics and clinical activity, and will be further characterized in dose expansion and phase II studies. Tumor response to treatment (RECIST 1.1) in patients with measurable lesions. Clinical trial information: NCT03508011 and NCT03507543. [Table: see text]

Phase I Study of the Novel Epothilone Analog Ixabepilone (BMS-247550) in Patients With Advanced Solid Tumors and Lymphomas

2007 ◽  
Vol 25 (9) ◽  
pp. 1082-1088 ◽  
Author(s):  
Carol Aghajanian ◽  
Howard A. Burris ◽  
Suzanne Jones ◽  
David R. Spriggs ◽  
Marvin B. Cohen ◽  
...  
Keyword(s):  
Plasma Concentration ◽  
Solid Tumors ◽  
Dose Escalation ◽  
Mononuclear Cells ◽  
Degradation Products ◽  
Standard Dose ◽  
Chemical Degradation ◽  
Maximum Plasma ◽  
Advanced Solid Tumors ◽  
Phase Ii Studies

Purpose To establish the maximum-tolerated dose (MTD), dose-limiting toxicity (DLT), safety, pharmacokinetics, and pharmacodynamics of ixabepilone when administered as a 1-hour infusion every 3 weeks to patients with advanced solid tumors or relapsed/refractory non-Hodgkin's lymphoma. Dosing schedules of 40 mg/m2 and 50 mg/m2 over 3 hours were also evaluated. Patients and Methods Sixty-one patients were enrolled using an initial accelerated dose-escalation phase followed by a standard dose-escalation phase, with doses of ixabepilone ranging from 7.4 to 65 mg/m2. The pharmacokinetics of ixabepilone and two of its chemical degradation products were evaluated. Plasma pharmacodynamics were evaluated for both 1- and 3-hour infusions using an assay that measures the amount of endogenous tubulin in peripheral-blood mononuclear cells that exists in the polymerized versus the unpolymerized state. Response evaluation was performed every 6 weeks. Results The most common DLTs were neutropenia, stomatitis/pharyngitis, myalgia, and arthralgia. The MTD of ixabepilone as a 1-hour infusion every 3 weeks was established as 50 mg/m2. The maximum plasma concentration and area under the plasma concentration time curve appeared to increase less than proportionally to dose. Durable objective responses were seen in eight patients, including two complete responses. Five of the responders had experienced treatment failure with a taxane. Conclusion The recommended dose of ixabepilone for the initiation of phase II studies on the basis of these results is 50 mg/m2 over 1 hour every 3 weeks. The promising efficacy and tolerability results demonstrated by ixabepilone in this study warrant its continued development.

Phase I dose-escalation study to evaluate the safety, pharmacokinetics, and pharmacodynamics of CEP-9722 (a PARP1-2 inhibitor) as single‑agent and in combination with temozolomide in patients with advanced solid tumors (NCT00920595).

2012 ◽  
Vol 30 (15_suppl) ◽  
pp. 3052-3052 ◽  
Author(s):  
Mario Campone ◽  
Ruth Plummer ◽  
Peter Stephens ◽  
Zahir Brakchi ◽  
Louiza Aissat-Daudigny ◽  
...  
Keyword(s):  
Phase I ◽  
Solid Tumors ◽  
Mononuclear Cells ◽  
Excision Repair ◽  
Single Agent ◽  
Recommended Dose ◽  
Parp Inhibition ◽  
Advanced Solid Tumors ◽  
Pharmacokinetics And Pharmacodynamics ◽  
Grade 3

3052 Background: Poly-ADP-ribose (PAR) polymerases (PARPs) are essential in cellular processing of DNA damage via the base excision repair pathway. CEP-9722, an orally available PARP1-2 inhibitor, demonstrated single-agent antitumor activity and synergy with temozolomide (TMZ) in xenograft models. This phase I study evaluated the pharmacokinetics, pharmacodynamics, and the maximum tolerated dose (MTD) of CEP-9722 in monotherapy and combination with TMZ. Methods: Adult patients with advanced solid tumors were enrolled in cohorts of 3-6 patients to receive a 14-day cycle of CEP-9722 (days 1-5), followed by 28-day cycles of CEP-9722 (days 1-5) plus TMZ (150 mg/m2 days 1-5). The dose of CEP-9722 was 150 mg/day in the first cohort and was escalated depending on the occurrence of dose-limiting toxicities (DLTs) during cycles 1 and 2. The safety, pharmacokinetics, and pharmacodynamics (PAR levels in peripheral blood mononuclear cells) of CEP-9722 were analyzed. Results: Overall, 26 patients (18F,8 M) 18 to 71 years of age were enrolled in 5 cohorts of 3-9 patients and treated with CEP-9722 at 150-1000 mg/day. The MTD of CEP-9722 in combination with TMZ (150 mg/m2) was reached at 1000 mg/day. The recommended dose was 750 mg/day. A total of 9 patients were treated at the recommended dose. DLTs were observed in 2 patients during cycle 1 (1 grade 3 myositis at 750 mg/day and 1 grade 3 asthenia at 1000 mg/day) and 2 patients during cycle 2 (1 grade 3 asthenia at 300 mg/day and 1 persistent grade 2 weight loss at 1000 mg/day). Overall during this study, 4 grade 3 treatment-related adverse events were observed. The pharmacokinetics showed high intra- and inter-patient variability at all doses. The pharmacodynamic analysis demonstrated PARP inhibition at all doses, but the high inter- and intra-patient variability prevented any conclusion regarding a dose / PARP inhibition relationship. Conclusions: TheMTD of CEP-9722 when administered with TMZ was 1000 mg days 1-5 and the combination CEP-9722/TMZ was well tolerated. In addition, a clear signal of PARP inhibition was demonstrated.

Phase I trial of combination becatecarin and oxaliplatin in patients with advanced solid tumors

2007 ◽  
Vol 25 (18_suppl) ◽  
pp. 2561-2561
Author(s):  
S. Manda ◽  
C. Mauser ◽  
J. Bokar ◽  
M. Cooney ◽  
J. Brell ◽  
...  
Keyword(s):  
Phase I ◽  
Solid Tumors ◽  
Dose Level ◽  
Phase Ii ◽  
Phase I Trial ◽  
Performance Status ◽  
Advanced Solid Tumors ◽  
Phase Ii Studies ◽  
Grade 3 ◽  
Level 2

2561 Background: Becatecarin (rebeccamycin analogue-RA) is an anti-tumor antibiotic with inhibitory activity against both topoisomerase II and I as well as DNA intercalating properties. We performed a phase I trial to a) determine the maximum tolerated dose (MTD) of RA in combination with oxaliplatin; b) determine the dose limiting toxicities (DLT) (c) obtain data on pharmacokinetics and (d) observe for any antitumor activity. Methods: Eligibility criteria included patients with advanced solid tumors refractory to standard therapy; performance status 0–2; adequate hematologic, renal and liver function. Patients were treated with RA as a 1 hour infusion daily x 5 and oxaliplatin on day 5 only, after RA infusion. Treatment was repeated q 21 days. The following dose levels were evaluated: Dose level 1: RA 80 mg/m2/d and oxaliplatin 90 mg/m2; Dose level 2: RA 80 mg/m2/d and oxaliplatin 130 mg/m2; Dose level 3: RA 110 mg/m2/d and oxaliplatin 130 mg/m2. Results: A total of 15 evaluable patients were enrolled. Median age was 56 (8 male, 7 female). A variety of tumor types were enrolled. A total of 56 cycles were administered. DLT occurred at a dose of RA at 110 mg/m2/d x 5 days and oxaliplatin at 130 mg/m2 and consisted of grade 3 hypophosphatemia and grade 4 atrial fibrillation. At this dose level 2 of 3 enrolled patients also developed grade 3 neutropenia. The MTD and recommended phase II dose was RA at 80 mg/m2/daily x 5 along with oxaliplatin 130 mg/m2 day 5 q 21 days. Three confirmed partial responses were observed in patients with hepatocellular, gallbladder and esophageal cancers. Six patients experienced stable disease. Conclusions: At the MTD combination RA and oxaliplatin is well tolerated and given the response rate and stable diseases observed, phase II studies are recommended. Supported by Grants U01 CA62502, MO1-RR-00080, K23 CA109348–01 from the National Institutes of Health. No significant financial relationships to disclose.

Dual epidermal growth factor receptor (EGFR) inhibition: Phase I study combining cetuximab (C225) and erlotinib (E) in advanced solid tumors

2009 ◽  
Vol 27 (15_suppl) ◽  
pp. 3552-3552
Author(s):  
R. Sangha ◽  
C. Ho ◽  
L. Beckett ◽  
D. H. Lau ◽  
P. N. Lara ◽  
...  
Keyword(s):  
Phase I ◽  
Solid Tumors ◽  
Dose Level ◽  
Phase Ii ◽  
Dose Escalation ◽  
Gene Copy ◽  
Hematologic Toxicity ◽  
Advanced Solid Tumors ◽  
Egfr Inhibition ◽  
Biomarker Analysis

3552 Background: The EGFR pathway is implicated in lung tumorigenesis by aberrantly regulating cell proliferation, apoptosis, and invasion. Maximal blockade of the EGFR can be achieved by dually inhibiting the extracellular and intracellular domain with the monoclonal antibody C225 and the tyrosine kinase inhibitor, E. Given preclinical synergy of C225 and E, we hypothesized this combination would be feasible and result in improved therapeutic benefit. Methods: Patients (pts) with advanced solid tumors were enrolled using a standard phase I dose escalation design. C225 was administered IV weekly, with no loading dose, and E given orally daily on a 28-day cycle. Four dose levels were studied: C225 150 mg/m2, E 100 mg; C225 200 mg/m2, E 100 mg; C225 250 mg/m2, E 100 mg; and C225 250 mg/m2, E 150 mg. Dose limiting toxicity (DLT) was defined as: grade (Gr) 4 platelets, Gr 3 platelets with bleeding, febrile neutropenia, ≥ Gr 3 ANC with documented infection, or clinically significant > Gr 3 non-hematologic toxicity. Gr 3 rash based solely on pain or Gr 3 hypersensitivity infusion reactions were not considered DLTs. Results: 18 pts were treated: 13 NSCLC, 3 H&N, 1 pancreas, and 1 invasive thymoma. Characteristics: Age range 41–80, median 62.5; Gender: 7 M; ECOG PS ≤1 = 17; Prior chemo ≤1 = 10. Planned dose escalation was completed without reaching the MTD. The highest dose level was expanded to 6 pts. A single DLT for Gr 3 diarrhea was observed at the second dose level (C225 200 mg/m2, E 100 mg). Gr 3/4 toxicities were: lymphopenia (3), acneiform rash (3), nausea/vomiting (3), pruritis (1), fatigue (1), diarrhea (1), confusion (1), hypomagnesemia (1), hypocalcemia (1), hyponatremia (1), hyperkalemia (1), and anemia (1). Of 13 evaluable pts, 1 PR (NSCLC) and 4 with SD (2 NSCLC, 2 H&N). Median cycles: 2 (1–14) with one NSCLC pt on therapy for 8 cycles and one H&N pt receiving 14 cycles. Biomarker analysis of EGFR polymorphisms, gene copy number via FISH, and protein expression will be presented, along with the mutation status of EGFR and KRAS. Conclusions: 1) Dual EGFR inhibition with C225 250 mg/m2 weekly and E 150 mg daily is feasible, well tolerated, and the recommended phase II dose. 2) Efficacy of this combination in NSCLC is being evaluated in a phase II trial. [Table: see text]

Phase I study of CFI-402257, an oral TTK inhibitor, in patients with advanced solid tumors.

2017 ◽  
Vol 35 (15_suppl) ◽  
pp. TPS2619-TPS2619
Author(s):  
David W. Cescon ◽  
Aaron Richard Hansen ◽  
Albiruni Ryan Abdul Razak ◽  
Lee-Anne Stayner ◽  
John Frederick Hilton ◽  
...  
Keyword(s):  
Phase I ◽  
Solid Tumors ◽  
Spindle Assembly Checkpoint ◽  
Single Agent ◽  
Adverse Outcomes ◽  
Medical Illness ◽  
Advanced Solid Tumors ◽  
Active Inhibitor ◽  
Molecular Features ◽  
Phase Ii Studies

TPS2619 Background: TTK (MPS1), a dual-specificity serine-threonine kinase, is critical for the spindle assembly checkpoint (SAC), chromosome alignment and error correction in mitosis. Inhibition of TTK causes premature mitotic exit with unattached chromosomes, resulting in chromosomal missegregation, aneuploidy and cell death. TTK is overexpressed in several tumor types, which may contribute to survival and proliferation of aneuploid cells, and higher expression correlates with adverse outcomes. The Campbell Family Therapeutics Group at the University Health Network (UHN) has developed CFI-402257, a potent (Ki = 0.09 nM, IC50 = 1.2 nM), highly selective and orally active inhibitor of TTK, with negligible activity towards 265 other kinases. Robust suppression of tumor growth was achieved upon oral dosing of single agent CFI-402257 at tolerated doses in several cell line (breast, colorectal) and patient-derived (ovarian) xenograft models. Pharmacodynamic effects including reduction in phospho-histone H3 were observed. In syngeneic mouse colorectal cancer models, CFI-402257 + PD-1 immune checkpoint blockade demonstrated greater activity than either agent alone, and resulted in tumor regressions and immunity to rechallenge. Methods: This multi-center Phase I dose escalation study (3+3 design) will determine the safety, tolerability and maximum tolerated dose (MTD) of CFI-402257 administered as daily continuous oral treatment. Secondary and correlative endpoints include plasma PK, antitumor activity, and molecular features associated with response or clinical benefit. An expansion cohort (n = 12) will be enrolled at the MTD. Key inclusion criteria: adult patients with advanced solid tumors, measurable disease (RECIST 1.1), adequate organ function and performance status (ECOG 0-1). Exclusion criteria: uncontrolled medical illness, CNS metastases (unless stable x 3 months). CFI-402257 will be dosed once daily on a continuous schedule in 28-day cycles, beginning at 5 mg/day with planned escalation to 56 mg/day. DL1 completed enrolment 01/2017 and accrual is ongoing. Phase II studies are planned (Stand Up to Cancer Canada Breast Cancer Dream Team). Funding: UHN, CIRM. Clinical trial information: NCT02792465.

A phase I multiple-dose escalation study to assess the safety, tolerability, and pharmacokinetics of VEGF-receptor inhibitor telatinib (EOC315) in Chinese patients with advanced solid tumors.

2019 ◽  
Vol 37 (15_suppl) ◽  
pp. 3061-3061
Author(s):  
Hongming Pan ◽  
Tianshu Liu ◽  
Jason Tsai ◽  
Yapeng Zhao
Keyword(s):  
Phase I ◽  
Solid Tumors ◽  
Dose Escalation ◽  
Multiple Dose ◽  
Left Ventricular Systolic Dysfunction ◽  
Single Agent ◽  
Left Ventricular ◽  
Chinese Patients ◽  
Vegf Receptor ◽  
Advanced Solid Tumors

3061 Background: Telatinib (EOC315) is a highly selective inhibitor of VEGFR/PDGFR (VEGFR 1-3, PDGFR-β, and c-Kit tyrosine kinases). This phase I study was to assess the safety, tolerability, and pharmacokinetics (PK) of Telatinib in Chinese patients with advanced solid tumors. Methods: Telatinib was administered to Chinese patients with advanced refractory solid tumors as a single agent in 3+3 dose escalation design, starting from 600mg and escalated to 900mg and 1200mg, given orally twice daily. The PK profile, safety, and tolerability were evaluated per protocol. Efficacy was evaluated with RECIST 1.1 criteria every 6 weeks. Results: A total of 15 subjects (6 colorectal cancer, 4 lung cancer, 1 head and neck cancer, 1 melanoma, 1 thymic carcinoma, 1 esophageal carcinoma,1 peritoneal carcinoma) were enrolled per protocol between July 2017 and August 2018, and 13 subjects received at least second line therapies before enrollment. Telatinib was well tolerated in the three dose arms. No dose limiting toxicities (DLTs) occurred during the dose escalation phase. CTC grade 3 AEs observed include hypertension (46.7%, 7/15), fatigue (6.7%, 1/15), transaminase elevation (6.7%, 1/15), hand-foot syndrome (6.7%, 1/15), oral mucositis (6.7%, 1/15), neutropenia (6.7%, 1/15), urobilinogen elevation (6.7%, 1/15), left ventricular systolic dysfunction/decreased ejection fraction (6.7%, 1/15). No CTC grade 4 AE were observed. There were 2 drug related SAEs (hospitalization due to high blood pressure. The PK profile of Telatinib (EOC315) at 600, 900, 1200 mg in Chinese patient cohorts is summarized in Table. For 12 evaluable patients, DCR was 58.3%. For all patients, mPFS was 15 weeks (3.3-34.3w). Conclusions: This study demonstrated the safety and tolerability of Telatinib (EOC315) in a multiple dose escalation design at 600, 900, and 1200 mg PO bid in Chinese patients with advanced refractory solid tumor. Telatinib AUC increased dose-proportionally from 600 mg to 900 mg bid, where 900 mg Telatinib bid is the maximum feasible and recommended dose for future studies in Chinese patients with advanced tumors. Clinical trial information: NCT03175497. [Table: see text]

A phase I dose-escalation and expansion study of JPI-547, a dual inhibitor of PARP/tankyrase in patients with advanced solid tumors.

2021 ◽  
Vol 39 (15_suppl) ◽  
pp. 3113-3113
Author(s):  
Seock-Ah Im ◽  
SeungHwan Lee ◽  
Keun Wook Lee ◽  
Youngjoo Lee ◽  
Joohyuk Sohn ◽  
...  
Keyword(s):  
Phase I ◽  
Solid Tumors ◽  
Dose Escalation ◽  
Checkpoint Inhibitors ◽  
Dose Range ◽  
Single Agent ◽  
Pharmacokinetic Data ◽  
Advanced Solid Tumors ◽  
Dual Inhibitor ◽  
Expansion Phase

3113 Background: JPI-547 is an oral inhibitor of PARP 1/2 and Tankyrase 1/2. JPI-547 demonstrated anti-tumor activity in BRCA-deficient xenograft models as a single-agent and in combination with chemotherapy and immune checkpoint inhibitors. Methods: This is the first in human (FIH) phase I study of JPI-547 in patients (pts) with advanced solid tumors. For the dose escalation phase, a 3+3 design was used with 4 doses from 50 to 200 mg QD on 21-day cycles. Primary objectives were to assess safety and tolerability to determine RP2D, and secondary objectives included pharmacokinetics and preliminary antitumor activities. DLT monitoring period was 21 days. Pharmacodynamics and information of HRR mutation were also explored. For the dose expansion phase, pts with documented pathogenic germline or somatic BRCA/HRR mutations were enrolled to assess the preliminary efficacy and safety. Tumor response (RECIST 1.1) was evaluated every 6 weeks. Centralized germline BRCA testing was conducted to confirm pathogenic gBRCA mutations. Results available at the cut-off date of 31-Dec-2020 are presented. Results: For dose escalation phase, 22 pts were enrolled. JPI-547 was well absorbed with Tmax of 0.25-8 h post-dose and apparent half-life of 18-31 h. Mean Cmax and AUC increased proportionally (within the dose range of 50-200 mg). PAR level measured from PBMC was 53% inhibited at Cmax. One DLTs was observed at 100 mg (elevated ALT, G3) and 200 mg (elevated ALT/AST, G3) respectively. MTD was determined as 200 mg after considering DLTs and myelosuppression observed from cycle 2. RP2D was determined to be 150 mg based on the pharmacokinetic data and safety. Thirteen pts (59.1%) had at least one grade 3/4 TRAE and 12 had dose interruption/reduction due to TRAE. The most common ( > 20%) TRAE were anemia, thrombocytopenia and neutropenia. In dose expansion phase, 40 pts were enrolled, and response was evaluable in 39 pts. The best overall responses were 11 confirmed PR (cPR) and 15 SD with ORR of 28.2% (11/39) and DCR of 64.1 % (25/39). The mPFS was 3.5 mos and mDoR was 3.4 mos. At the time of data cut-off, three pts were ongoing as following response and cancer types: cPR (breast, ATMm, 9.0 mos), cPR (NSCLC, gBRCA2m, 3.8 mos) and SD (breast, gBRCAm, 9.3 mos). Five pts (2 ovarian, 3 breast) previously treated with olaparib and discontinued due to progressive disease were enrolled in this JPI-547 trial and one ovarian cancer pt showed cPR with 37% tumor shrinkage. Conclusions: These results demonstrate that JPI-547 is adequately absorbed with acceptable safety profile. Preliminary efficacy results suggest that JPI-547 monotherapy is effective in pts with BRCA/HRR mutation. Further investigation is warranted in pts with solid tumor including PARP inhibitor resistant cases. Clinical trial information: NCT04335604.

Phase 1 and phase 2a, first-in-human (FIH) study, of DRP-104, a broad glutamine antagonist, in adult patients with advanced solid tumors.

2021 ◽  
Vol 39 (15_suppl) ◽  
pp. TPS3149-TPS3149
Author(s):  
Melissa Lynne Johnson ◽  
Deborah Blythe Doroshow ◽  
Tanguy Y. Seiwert ◽  
Michael K. Gibson ◽  
Vamsidhar Velcheti ◽  
...  
Keyword(s):  
Antitumor Activity ◽  
Solid Tumors ◽  
Dose Level ◽  
Dose Escalation ◽  
Phase 1 ◽  
Single Agent ◽  
Primary Objective ◽  
Adult Patients ◽  
Glutamine Metabolism ◽  
Advanced Solid Tumors

TPS3149 Background: Dependence of cancer cells on glutamine has made glutaminolysis an attractive therapeutic target in cancer. Prior clinical trials evaluating glutamine analogues for the treatment of cancer were abandoned due to lack of efficacy and/or tolerability. DON (6-Diazo-5-oxo-L-norleucine) is an irreversible inhibitor of several enzymes that utilize glutamine as a metabolic substrate. In addition to direct anti-tumor efficacy, inhibition of glutamine metabolism in the tumor microenvironment has been shown to improve T-cell activation and tumor infiltration, increasing anti-tumor immune responses. As such, combining DON with an immune checkpoint inhibitor (ICI), has strong preclinical rationale. The investigational product DRP-104 (sirpiglenastat) is an inactive prodrug of DON designed to limit systemic DON exposure while targeting glutamine dependence in tumor cells. Methods: A phase 1/2a, FIH, multi-center, non-randomized, multi-cohort, open-label study of DRP-104 is currently open to accrual for patients with advanced solid tumors. This study will be conducted in 4 parts: A) Dose Escalation of IV and subQ DRP-104 (Run-In phase followed by modified Continual Reassessment Method) to define MTD/RP2D. Primary objective of dose escalation is to assess the safety, tolerability, pharmacokinetics, pharmacodynamics and preliminary antitumor activity of DRP-104 as a single agent; B) Dose Expansion of IV and subQ DRP-104 for safety assessment while primary objective is to select and recommend phase 2 DRP-104 route of administration; C) Phase 2a at recommended MTD/RP2D of selected route of DRP-104 in 2 patient cohorts: patients with locally advanced/metastatic NSCLC with KEAP1, NFE2L2 and/or STK11 mutation and patients with unresectable or metastatic SCCHN, in order to assess the safety, tolerability and preliminary antitumor activity of DRP-104 as a single agent; D) Phase 2a at recommended MTD/RP2D of selected route of DRP-104 in combination with atezolizumab in adult patients with advanced solid tumors previously treated with an ICI, in order to assess the safety, tolerability and preliminary antitumor activity of DRP-104 in combination with atezolizumab; DRP-104 IV is infused TIW over 1 hour infusion for 2 consecutive weeks followed by 1 week off. DRP-104 subQ is administered BIW weekly. Study is currently open with 6 IV patients (Run-In Phase completed and at Dose Level 4) and 3 subQ patients at Dose Level 1 at time of submission. Clinical trial information: NCT04471415.

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