scholarly journals A Dose Escalation Phase Ia Study of Anti-CD20 Antibody Drug Conjugate, MRG001 in Relapsed/Refractory Advanced Non-Hodgkin Lymphom

Blood ◽  
2021 ◽  
Vol 138 (Supplement 1) ◽  
pp. 2490-2490
Author(s):  
Yuqin Song ◽  
Ye Guo ◽  
Zhao Wang ◽  
Meng Wu ◽  
Wei Peng ◽  
...  
Keyword(s):  
Antitumor Activity ◽  
B Cell ◽  
Dose Level ◽  
Dose Escalation ◽  
Antibody Drug Conjugate ◽  
Dose Escalation Study ◽  
Level Increase ◽  
Grade 3 ◽  
Anti Cd20 ◽  
Antibody Drug

Abstract Background: MRG001 is an antibody drug conjugate (ADC), which is composed of a chimeric anti-CD20 monoclonal antibody conjugated via a valine citrulline linker to monomethyl auristatin E (MMAE), an anti-microtubulin agent. In preclinical studies, MRG001 demonstrated significant tumor growth inhibition in rituximab-resistant non-Hodgkin's lymphoma (NHL) models. MRG001 is being evaluated in a first-in-human, open-label, multicenter Phase I study for the safety, tolerability, pharmacokinetics (PK) and preliminary antitumor activity in patients with CD20-positive relapsed or refractory (R/R) B-cell NHL. Methods: MRG001 was evaluated as a monotherapy for the treatment of patients with confirmed CD20-positive R/R B-cell NHL. The study consists of Phase Ia dose escalation and Ib dose expansion. In the Phase Ia dose-escalation study utilizing a "3+3" design, patients with pathologically confirmed R/R NHL received single agent MRG001 intravenously once every 3 weeks (Q3W) for a maximum of 6 treatment cycles. Six dose levels ranging from 0.15 to 2.5 mg/kg were evaluated for safety, PK and preliminary antitumor activity to determine the MTD/RP2D. Results: From June 25, 2019 to May 31, 2021, a total of 21 subjects with DLBCL (n=8), FL (n=12), and MZL (n=1) who met the eligibility criteria had received at least two cycles of MRG001. As of May 31, 2021, 18 subjects were off treatment and 3 subjects were still on treatment. There were 3 subjects enrolled into the 0.15, 0.3 , 0.6, 1.2 and 2.5 mg/kg cohort respectively, and 6 subjects enrolled into the 1.8 mg/kg cohort. Of the 21 subjects enrolled, 12 subjects were male and 9 subjects were female, with age ranging from 27 to 75 years old. Among the 18 subjects who were off treatment, 5 had completed 6 cycles of treatment, and 13 had drug discontinuation (12 due to progression of disease and 1 subject due to withdrawal of the informed consent for personal reasons). Commonly observed drug-related TEAEs were decreased white blood cell/neutrophil/lymphocyte counts, ALT/AST elevation, pyrexia, hypertension, increased LDH, QT prolongation, and thrombocytopenia.TEAEs (29 cases) ≥ Grade 3 were reported in 9 subjects, including 23 drug-related TEAEs in 8 subjects. The most commonly reported Grade 3 or above TRAEs were leukopenia/neutropenia, lymphopenia, hypertension, and ALT elevation. In the 2.5 mg/kg cohort, two subjects experienced drug-related toxicities that met the DLT definition per protocol, including 1 subject with Grade 3 hyperlipidemia and 1 subject with Grade 4 neutropenia that lasted 5 days. There was no death due to AEs. PK samples of total antibody, MRG001 and MMAE were measured at predefined time points and the results showed that the C max and AUC of total antibody, MRG001 and MMAE increased with dose level increase. The T max of MMAE was non-linear to dose level increase, similar trends could be observed in two other parameters including C max and AUC 0-t, which suggested that MMAE was continuously released from MRG001. Among 21 pts who had at least one tumor assessment, 1 CR (5%), 4 PR (19%), 9 SD (43%), and 7 PD (33%). The investigator assessed ORR was 24% and the DCR was 67%. In the starting dose 0.15 mg/kg cohort, one subject with FL acheived PR. Among six subjects (4 with DLBCL and 2 with FL) enrolled in the 1.8 mg/kg cohort, one DLBCL subject achieved CR and another subject with DLBCL achieved PR, ORR was 33.33% (2 out of 6). Three subjects were enrolled in the 2.5 mg/kg cohort, two subjects with FL had PR, both of them had DLT on cycle 1 and had dose reduction to 1.8 mg/kg from cycle 2, ORR was 66.7% (2 out of 3). Conclusion: The dose escalation study of MRG001 has shown manageable safety profiles and encouraging preliminary antitumor activity in patients with NHL. Based on the safety, tolerability, and pharmacokinetic parameters of MRG001, 1.8 mg/kg was determined to be the RP2D and further investigation of MRG001 in patients with NHL is warranted. Disclosures Peng: Lepu Biopharma Co., Ltd.: Current Employment. Sun: Shanghai Miracogen Inc.: Current Employment. Sun: Shanghai Miracogen Inc.: Current Employment. Li: Shanghai Miracogen Inc.: Current Employment.

Anti-CD79B Antibody-Drug Conjugate DCDS0780A in Patients with B-Cell Non-Hodgkin Lymphoma: Phase 1 Dose-Escalation Study

2022 ◽  
pp. clincanres.3261.2021
Author(s):  
Alex F. Herrera ◽  
Manish R. Patel ◽  
John M. Burke ◽  
Ranjana Advani ◽  
Bruce D. Cheson ◽  
...  
Keyword(s):  
B Cell ◽  
Hodgkin Lymphoma ◽  
Dose Escalation ◽  
Phase 1 ◽  
Antibody Drug Conjugate ◽  
Dose Escalation Study ◽  
Drug Conjugate ◽  
Non Hodgkin Lymphoma ◽  
Antibody Drug

A phase I study to evaluate safety and antitumor activity of biweekly BMS-936558 (Anti-PD-1, MDX-1106/ONO-4538) in patients with RCC and other advanced refractory malignancies.

2011 ◽  
Vol 29 (7_suppl) ◽  
pp. 331-331 ◽  
Author(s):  
D. F. McDermott ◽  
C. G. Drake ◽  
M. Sznol ◽  
J. A. Sosman ◽  
D. C. Smith ◽  
...  
Keyword(s):  
Antitumor Activity ◽  
Phase I ◽  
Median Duration ◽  
Dose Escalation ◽  
Tumor Type ◽  
Duration Of Treatment ◽  
Open Label ◽  
Cell Renal Cell Carcinoma ◽  
Dose Escalation Study ◽  
Grade 3

331 Background: Programmed death-1 (PD-1), a T-cell inhibitory receptor, may suppress antitumor immunity. BMS-936558, a fully human PD-1 blocking antibody, has shown antitumor activity and manageable toxicity after biweekly dosing (Sznol, ASCO 2010, #2506). This report provides an update on safety and antitumor activity with special emphasis on RCC. Methods: An open-label phase I dose escalation study of BMS-936558 was conducted in patients (pts) with treatment refractory metastatic clear-cell renal cell carcinoma (RCC), castrate-resistant prostate cancer (CRPC), melanoma (MEL), non-small cell lung cancer, or colorectal cancer (CRC). Dose escalation continued to 10 mg/kg when an expansion cohort for pts (16) with each tumor type was opened for additional safety and efficacy information. Tumor response (RECIST) was evaluated every 8 weeks. Clinically stable pts with early PD could continue until further PD or clinical deterioration. Results: 126 pts (18 RCC) were treated with 1, 3, or 10 mg/kg. MTD was not reached. Across all doses, the most common AEs (Any/grade 3-4) were fatigue (45.2%/6.3%) and diarrhea (30.2%/0.8%) while the most common drug-related AEs (Any/grade 3-4) were fatigue (20.6%/0.8%), rash (11.9%/0%), pruritus (11.3%/0%), and diarrhea (10.3%/0.8%). There was no apparent relationship between dose and frequency of AEs. One pt died with sepsis while being treated for drug-related grade 4 pneumonitis. The median number of prior treatment regimens in the RCC cohort was 2 (range 1-6). Of the 18 RCC pts, 16 were treated with 10 mg/kg. The median duration of treatment was 7.6+mo. ORR was 5/16 (31.2%) and SD>4mo was 6/16 (37.5%). The median duration of response was 4.0+ mo (3.7-7.4+ mo). Of the 2 RCC pts treated with 1 mg/kg, 1 obtained a CR (12+ mo) and 1 had SD (21+ mo). For evaluable CRPC pts, 1/15 pts (6.7%) obtained a PR (2+ mo) and 3/15 (20%) had SD>4mo. Conclusions: BMS-936558 administered biweekly is tolerable and has encouraging antitumor activity in a previously treated patients with RCC. Data on baseline characteristics, long-term toxicity and response duration will be updated at the meeting. [Table: see text]

Phase 1 dose escalation study of MEDI-565, a bispecific T-cell engager that targets human carcinoembryonic antigen (CEA), in patients with advanced gastrointestinal (GI) adenocarcinomas.

2016 ◽  
Vol 34 (4_suppl) ◽  
pp. 320-320
Author(s):  
Michael J. Pishvaian ◽  
Michael Morse ◽  
Jennifer T. McDevitt ◽  
Song Ren ◽  
Gabriel Robbie ◽  
...  
Keyword(s):  
T Cell ◽  
Antitumor Activity ◽  
Dose Escalation ◽  
Half Life ◽  
High Titer ◽  
Phase 1 ◽  
Single Chain ◽  
Dose Escalation Study ◽  
Human T Cell ◽  
Grade 3

320 Background: MEDI-565, a bispecific single-chain antibody, targets human CEA on tumor cells and the CD3 epsilon subunit of the human T-cell receptor complex. In murine models, MEDI-565 showed antitumor activity in CEA-expressing tumors (J Immunother 2009;34:341-52). Methods: This phase 1, multicenter, open-label, dose-escalation study enrolled adults with GI adenocarcinomas (including esophageal, gastric, small intestine, colorectal, biliary tract, and pancreatic). MEDI-565 was given intravenously over 3 h on days 1–5 in 28-day cycles, with 4 single-patient (pt) (0.75–20 μg) and 5 standard 3+3 escalation (60 μg–3 mg; 1.5–7.5 mg with dexamethasone [dex]) cohorts. Primary objective was to determine the maximum tolerated dose (MTD); secondary objectives were to evaluate pharmacokinetics (PK), antidrug antibody (ADA), and antitumor activity. Results: Study enrolled39 pts: mean age 59 y; 56% male; 28 (72%) colorectal, 6 (15%) pancreatic, 5 (13%) other. Dose-limiting toxicities (grade ≥ 3 nonhematologic) were seen in 4 pts (2 at 3-mg; 2 at 7.5-mg + dex): hypoxia (n = 2), diarrhea, and cytokine release syndrome (CRS). Grade 3 treatment-related adverse events (AEs) seen in 5 pts: diarrhea, CRS, increased alanine aminotransferase, hypertension (all n = 1), and hypoxia (n = 2). Treatment-related serious AEs seen in 6 pts: diarrhea, vomiting, pyrexia, CRS (all n = 1), and hypoxia (n = 2). Five pts discontinued treatment due to AEs: diarrhea, CRS, central nervous system metastases, and hypoxia (n = 2). MEDI-565 exposures increased in approximately dose-proportional manner, with clearance (35–77 L/d) and half-life (2–7 h) typical of drug class. ADA had minor impact; 19 pts (48.7%) had ADAs, 5/39 (12.8%) with high titer, with decreased MEDI-565 concentrations in 2 pts. Plasma inflammatory cytokines were elevated posttreatment in several pts at 1.5- and 3-mg (no dex) dose levels. No objective responses were observed; 11 (28%) pts had stable disease as best response. Conclusions: The MTD of MEDI-565 in pts with GI adenocarcinomas was 5 mg with dex. PK was linear, with fast clearance and short half-life. No objective responses were observed. Clinical trial information: NCT01284231.

Phase 1 single-center, dose escalation study of D2C7-IT administered intratumorally via convection-enhanced delivery for adult patients with recurrent malignant glioma.

2017 ◽  
Vol 35 (15_suppl) ◽  
pp. e13532-e13532 ◽  
Author(s):  
Dina Randazzo ◽  
Annick Desjardins ◽  
Vidyalakshmi Chandramohan ◽  
John H. Sampson ◽  
Katherine B. Peters ◽  
...  
Keyword(s):  
Dose Level ◽  
Dose Escalation ◽  
Phase 1 ◽  
Genetically Engineered ◽  
Convection Enhanced Delivery ◽  
Dose Escalation Study ◽  
Who Grade ◽  
Recombinant Immunotoxin ◽  
Level 3 ◽  
Grade 3

e13532 Background: D2C7 immunotoxin (D2C7-IT) is a dual-specific recombinant immunotoxin consisting of EGFR-wt and EGFRvIII monoclonal antibodies with a genetically engineered Pseudomonas exotoxin, PE-38KDEL. The primary objective is to determine the maximum tolerated dose of D2C7-IT when delivered intratumorally by convection enhanced delivery (CED). Methods: Inclusion criteria includes subjects with a single, recurrent supratentorial WHO grade III or IV glioma, KPS ≥ 70 and a washout of chemotherapy, bevacizumab or study drug of ≥ 4 weeks. Prior to administration of D2C7-IT, recurrent tumor must be confirmed by histopathology. A minimum of 2 subjects are accrued by dose level. Results: Currently, 23 subjects have been treated (16 male, 7 female) with a median age of 54 years. Out of 9 dose levels, 2 subjects have been treated at every dose except for 4 at dose level 3 (120 ng/ml) and 5 at dose 6 (405ng/ml). Adverse events possibly, probably or definitely related to D2C7-IT are mostly grade 1 or 2 events consisting of, but not limited to: intracranial hemorrhage (n = 1), stroke (n = 2), headache (n = 15), seizure (n = 5), confusion (n = 4), paresthesia (n = 4), dysarthria (n = 1), dysphasia (n = 4), visual disturbances (n = 7), fatigue (n = 4), gait disturbance (n = 2), elevated transaminases (n = 5), decreased platelets (n = 3), decreased neutrophil count (n = 1), nausea (n = 3), vomiting (n = 1), and thromboembolic event (n = 1). There was 1 dose limiting toxicity (grade 4 seizure at dose level 3), 2 grade 3 headaches and 1 grade 3 elevated ALT. 14 subjects are still alive with 6 remaining on study. So far, the longest survival time from infusion is 18.2+ months. Conclusions: D2C7-IT infusion via CED is safe with encouraging results. This dose escalation Phase I study is ongoing and will set the stage for the Phase II trial. Clinical trial information: NCT02303678.

A phase I dose escalation study evaluating the safety and tolerability of a novel anti-HER2 antibody-drug conjugate (PF-06804103) in patients with HER2-positive solid tumors.

2020 ◽  
Vol 38 (15_suppl) ◽  
pp. 1039-1039 ◽  
Author(s):  
Funda Meric-Bernstam ◽  
Emiliano Calvo ◽  
Victor Moreno ◽  
Hyun Cheol Chung ◽  
Yeon Hee Park ◽  
...  
Keyword(s):  
Phase I ◽  
Dose Escalation ◽  
Standard Therapy ◽  
Objective Response ◽  
Antibody Drug Conjugate ◽  
Her2 Positive ◽  
Dose Escalation Study ◽  
Strong Activity ◽  
Drug Conjugate ◽  
Antibody Drug

1039 Background: PF-06804103 is an anti-HER2 immunoglobulin G1 antibody-drug conjugate (ADC), comprising an anti-HER2 monoclonal antibody conjugated with a cleavable linker to the cytotoxic agent Aur0101. PF-06804103 demonstrated strong activity in low to high HER2-expressing preclinical tumor models. In this study, the safety and tolerability of PF-06804103 was assessed in patients with advanced breast cancer (BC) or gastric cancer (GC). Methods: This multi-center, open-label, first-in-patient, phase I study (NCT03284723) has two parts: dose escalation (Part 1) and dose expansion (Part 2). In Part 1, groups of adult patients (pts) with HER2+ BC or HER2+ GC, who are resistant or intolerant to standard therapy or for which no standard therapy is available, received PF-06804103 intravenously once every 21 days (Q3W); dosage was escalated per cohort. Primary objectives were to evaluate the safety and tolerability of PF-06804103, characterize its dose-limiting toxicities (DLTs), and determine the recommended phase 2 dose. Response was assessed using RECIST v1.1. Objective response rate (ORR) was calculated for response-evaluable pts with target lesions at baseline and ≥1 post-baseline assessment (including unconfirmed responses). Results: A total of 35 pts (BC: n = 20; GC: n = 15) received PF-06804103 at escalating dose levels (0.15 mg/kg: n = 2; 0.5 mg/kg: n = 2; 1.2 mg/kg: n = 2; 2 mg/kg: n = 4; 3 mg/kg: n = 10; 4 mg/kg: n = 9; 5 mg/kg: n = 6). The median (range) number of prior therapies was 6 (3–18) and 3 (1–6) for BC and GC groups, respectively (all pts had prior HER2-targeted therapy). The 3 most common, drug-related adverse events (any grade) were alopecia (n = 17, 48.6%), fatigue (n = 15, 42.9%), and neuropathy (n = 9, 25.7%). DLTs (mostly grade 3) occurred in 3 pts and included arthralgia, neuropathy, myalgia, fatigue, and osteomuscular pain. Preliminary ORR in the patients treated with doses ≥3mg/kg was 52.4% (11/21). Conclusions: The PF-06804103 ADC demonstrated manageable toxicity and promising anti-tumor activity in this small, heavily pretreated study population. Clinical trial information: NCT03284723 .

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