scholarly journals CTIM-28. PHASE 2 TRIAL OF CONTROLLED IL-12 IN COMBINATION WITH PD-1 INHIBITOR IN ADULT SUBJECTS WITH RECURRENT GLIOBLASTOMA (rGBM)

2020 ◽  
Vol 22 (Supplement_2) ◽  
pp. ii39-ii39
Author(s):  
Rimas Lukas ◽  
E Antonio Chiocca ◽  
Nancy Ann Oberheim Bush ◽  
Joseph Landolfi ◽  
Robert Cavaliere ◽  
...  
Keyword(s):  
Overall Survival ◽  
Survival Data ◽  
Phase 1 ◽  
Safety Data ◽  
Recurrent Glioblastoma ◽  
Preliminary Review ◽  
Phase 2 ◽  
Phase 2 Trial ◽  
Immune Mediated

Abstract Ad-RTS-hIL-12 (Ad) is a gene therapy candidate for intratumoral (IT) delivery that conditionally expresses IL-12 (IL-12) under the transcriptional control of orally administered veledimex (V) acting via the RheoSwitch Therapeutic Systemâ gene switch. Increased PD-1 expression in samples of rGBM following Ad+V (ASCO 2020) supports combination immunotherapy with a PD-1 inhibitor. Phase 1 trials in rGBM of Ad+V as monotherapy and in combination with PD-1 inhibitor revealed encouraging safety and survival data. This phase 2 trial (NCT04006119) in adults with rGBM is evaluating safety and efficacy (overall survival) of Ad + V with pre/post-operative cemiplimab-rwlc (cemi) 350 mg IV, Days -7, 15, then Q3W; Ad single IT injection (2 x 1011 viral particles, day of resection (Day 0) /craniotomy); and V (20 mg PO, Days 0–14). Longitudinal sampling of serum assessed IL-12 and endogenous cytokines production. Anti-tumor effects were described upon preliminary review. Serial MRI evaluated tumor response. Follow-up described overall survival. Initial safety data (51 unique adverse reactions in 28 subjects) appeared similar to Ad+V and the cemi label, respectively, being manageable without synergistic toxicities and generally reversible. Of 35 SAEs reported in 18 subjects, 10 SAEs in 7 subjects were related to Ad+V. IL-12 and IFN-g levels increased after Ad+V administration peaking on Day 3 at 34 ± 11 pg/mL and 13 ± 5 pg/mL (mean ± SEM), respectively. Immune-mediated anti-tumor effects were noted, including a post-treatment biopsy to rule out progression which demonstrated an immune infiltrate consistent with pseudoprogression and loss of tumor cell heterogeneity suggesting immunoediting. Enrollment is anticipated to be completed in 2Q2020 with follow-up ongoing and initial survival data will be presented. V crossed the blood-brain barrier to produce functional IL-12. Controlled IL-12 therapy and cemi is a rational combination with initial data consistent with immune-mediated anti-tumor effects with a favorable safety profile.

scholarly journals RTID-06. ENHANCING TUMOR TREATING FIELDS THERAPY FOR RECURRENT GLIOBLASTOMA WITH TARGETED AND INDIVIDUALIZED SKULL REMODELING SURGERY. A MULTI-CENTER RANDOMIZED PHASE 2 TRIAL

2020 ◽  
Vol 22 (Supplement_2) ◽  
pp. ii194-ii194
Author(s):  
Nikola Mikic ◽  
Anders Korshøj
Keyword(s):  
Overall Survival ◽  
Sample Size ◽  
Best Practice ◽  
Recurrent Glioblastoma ◽  
Karnofsky Performance Score ◽  
Phase 2 ◽  
Oncological Treatment ◽  
Tumor Treating Fields ◽  
Phase 2 Trial

Abstract BACKGROUND We present an upcoming(Sep. 2020) randomized, comparative, multi-center, investigator-initiated, interventional, phase 2 trial testing the efficacy of a novel therapeutic concept for recurrent glioblastoma(GBM). The intervention combines personalized targeted skull remodeling surgery(SR-surgery) with Tumor Treating Fields(TTFields) and best practice medical oncological therapy. SR-surgery involves strategically placed burr holes to strengthen the electric field in the tumor region. Preclinical studies indicate that SR-surgery provides a marked and focal enhancement(~100%) of TTFields. We recently concluded a phase 1 safety/feasibility study indicating promising clinical efficacy and no clinically significant toxicity related to the intervention. This subsequent randomized, comparative phase 2 trial aims to validate superior efficacy of the treatment. METHOD We will utilize a comparative, 1:1 randomized, minimax two-stage phase 2 design with an expected sample size of 70 patients, interim futility analysis at 1-yr follow-up of the first 52 patients and a maximum sample size of 84 patients. Patients will receive either 1)TTFields and best practice medical oncological treatment(control arm) or 2) SR-surgery plus TTFields and best practice medical oncological treatment (interventional arm). Major eligibility criteria include age ≥ 18 years, supratentorial GBM, Karnofsky performance score(KPS) ≥ 70, focal tumor, and lack of uncontrollable epilepsy or significant co-morbidity. The study is designed to detect a 20% increase in the overall survival rate 12 months(OS12) assuming OS12=40% in the control group and OS12= 60% in the intervention group. Secondary endpoints include hazard ratio of overall survival and progression-free survival, objective response rate, QoL, KPS, steroid dose, and toxicity. Patients will be followed for the whole trial period(36 months). The average expected follow-up is 18 months and includes regular assessment of toxicity, response and QoL. Endpoint data will be collected at the end of the trial, occurrence of suspected unexpected serious adverse reactions(SUSARs) or unacceptable serious adverse events(SAEs), withdrawal of consent, or loss-to-follow-up.

Combining active immunotherapy and immune checkpoint inhibitors in prostate cancer.

2015 ◽  
Vol 33 (7_suppl) ◽  
pp. 172-172 ◽  
Author(s):  
Harpreet Singh ◽  
Ravi Amrit Madan ◽  
William L. Dahut ◽  
Geraldine Helen O'Sullivan Coyne ◽  
Myrna Rauckhorst ◽  
...  
Keyword(s):  
Overall Survival ◽  
Survival Data ◽  
Immune Checkpoint ◽  
Immune Checkpoint Inhibitor ◽  
Phase 1 ◽  
Active Immunotherapy ◽  
Phase 2 ◽  
Phase 3 ◽  
Phase 2 Trial ◽  
Combination Study

172 Background: Results of recent clinical trials have intensified interest in immunotherapy in oncology. A number of cancer immunotherapies have been approved recently, while others are in late stage clinical development. The poxvirus-based active immunotherapy, PROSTVAC is generally well tolerated and is currently being evaluated in a global Phase 3 randomized, placebo-controlled trial. Ipilimumab, an approved immune checkpoint inhibitor in melanoma, is also being evaluated in a Phase 3 trial in chemo-naïve mCRPC. Methods: Results of two Phase 2 trials in men with mCRPC who were treated with PROSTVAC alone were compared with results from a Phase 1 combination study in mCRPC patients treated with PROSTVAC plus escalating doses of ipilimumab. Patients were enrolled in the Phase 1 combination study when docetaxel was the only FDA-approved mCRPC treatment that improved overall survival (OS). Results: In a multicenter Phase 2 trial, 125 men were randomized 2:1 to receive PROSTVAC or placebo. Patients treated with PROSTVAC had improved OS compared to placebo (25.1 vs 16.6 months; HR 0.56; 95% CI 0.37-0.85).Similar data was seen in a second phase 2 trial of PROSTVAC, where 32 patients with mCRPC had a median OS of 26.6 months (predicted median OS by the Halabi nomogram was 17.4 months). In a Phase 1 combination study of 30 mCRPC patients with similar baseline characteristics (predicted median OS of 18.5 months), patients were treated with PROSTVAC plus escalating doses of ipilimumab. The observed median OS was 31.3 months for all dose cohorts and 37.2 months for patients treated at 10 mg/kg based on updated overall survival data. Furthermore, there appears to be a tail on the curve with approximately 20% of patients at 10 mg/kg alive at 80 months. Conclusions: The comparison of data from three independent trials of PROSTVAC active immunotherapy in three similar patient populations provides hypothesis-generating data that the addition of an immune checkpoint inhibitor may have a positive effect on overall survival through a potential synergy in mechanism of action. The updated long term survival data is further evidence of improved OS with PROSTVAC. Future randomized trials are being planned to prospectively evaluate this hypothesis. Clinical trial information: NCT00113984.

scholarly journals CTNI-18. FINAL RESULTS OF A PHASE 2 STUDY OF EFFICACY, SAFETY AND INTRATUMORAL PHARMACOKINETICS (PK) OF SELINEXOR MONOTHERAPY IN RECURRENT GLIOBLASTOMA (rGBM)

2020 ◽  
Vol 22 (Supplement_2) ◽  
pp. ii46-ii46
Author(s):  
Andrew Lassman ◽  
Patrick Wen ◽  
Martin van den Bent ◽  
Scott Plotkin ◽  
Annemiek Walenkamp ◽  
...  
Keyword(s):  
Nuclear Export ◽  
Phase 1 ◽  
Progression Free Survival ◽  
Median Number ◽  
Recurrent Glioblastoma ◽  
Phase 2 ◽  
Nuclear Retention ◽  
Phase 2 Trial ◽  
Human Gbm

Abstract BACKGROUND Selinexor is an FDA-approved first-in-class, oral selective nuclear export inhibitor which forces nuclear retention of many tumor suppressor proteins. METHODS We conducted a phase 2 trial of selinexor monotherapy for adults with recurrent GBM including a surgical arm to explore intratumoral PK and 3 medical arms to optimize dosing. Prior treatment with radiotherapy and temozolomide was required; prior bevacizumab was exclusionary. The primary endpoint was 6-month progression-free survival (6mPFS) rate. RESULTS Selinexor administered ~2 hours pre-operatively yieleded average intratumoral concentration (136 nM, n=6) comparable to the in vitro IC50 (130 nM) from 7 primary human GBM cell lines. Among all 68 patients accrued to 3 medical arms (~85 mg BIW, n=24; 60 mg BIW, n=14; 80 mg QW, n=30), median age was 56 years (21–78). Median number of prior lines of therapies was 2 (1–7). At 80 mg QW, 28% patients were progression-free at the end of cycle 6; the 6mPFS was 17%; disese control rate by RANO was 37% (1 CR, 2 PRs, 7 SD) among 27 evaluable patients; responses were durable (median 11.1 months), and treatment lasted for 442, 547 and 1282 days in 3 responders, as of data lock, with one responder remaining on treatment off study; median overall survival was 10.2 months with 95% CI (7.0, 15.4). The ~85 mg BIW-schedule was abandoned due to poor tolerability. The related adverse events (all grades) in patients on ~85 mg BIW/60 mg BIW/80 mg QW were nausea (41.7%/64.3%/66.7%), fatigue (70.8%/71.4%/50.0%), neutropenia (29.2%/14.3%/33.3%), decreased appetite (45.8%/71.4%/26.7%), thrombocytopenia (66.7%/28.6%/23.3%) and weight loss (16.7%,/42.9%/6.7%). CONCLUSION Selinexor monotherapy demonstrated encouraging intratumoral penetration and efficacy, with durable disease control in rGBM. Monotherapy dose at 80 mg QW is recommended for further development in rGBM. A phase 1/2 study of combination therapy for newly diagnosed or rGBM has been initiated (NCT04421378).

Atezolizumab + obinutuzumab + venetoclax in patients with relapsed or refractory indolent non-Hodgkin’s lymphoma (R/R iNHL): Primary analysis of a phase 2 trial from LYSA.

2021 ◽  
Vol 39 (15_suppl) ◽  
pp. 7544-7544
Author(s):  
Charles Herbaux ◽  
Herve Ghesquieres ◽  
Reda Bouabdallah ◽  
Stephanie Guidez ◽  
Emmanuel Gyan ◽  
...  
Keyword(s):  
Tumor Lysis Syndrome ◽  
Safety Data ◽  
Induction Treatment ◽  
Phase 2 ◽  
Primary Analysis ◽  
Phase 2 Trial ◽  
Ann Arbor ◽  
Baseline Characteristics ◽  
Grade 3

7544 Background: R/R iNHL treatment remains challenging. Atezolizumab (ATE) and obinutuzumab (OBI) are monoclonal antibodies acting respectively to inhibit T-lymphocyte exhaustion or by inducing lymphoma cells cytotoxicity, whereas venetoclax (VEN) is a small molecule inhibiting BCL-2. Combining tumor-targeted therapies with agents that enhance anti-tumor immunity represents an attractive treatment paradigm. This LYSA sponsored multicenter phase 2 trial (NCT03276468) evaluated ATE, OBI and VEN combination in R/R B-cell lymphomas. Herein, we present primary efficacy and safety data from the iNHL cohort including Follicular Lymphoma (FL) and Marginal Zone Lymphomas (MZL). Methods: Patients ≥18 years with biopsy-confirmed R/R FL and MZL who failed at least one line of therapy were eligible. OBI was given IV at 1 g on day (D) 1, 8 and 15 of cycle (C) 1 and on D1 from C2 to C8 every 3 weeks. ATE was given IV, 1.2 g every 3 weeks, started at D2 of C1, then administered at D2 of each cycle for 24 cycles. VEN was given orally at 800 mg/D at full dose, starting on D8C1 for 24 cycles. The primary endpoint was the Overall Response Rate (ORR) evaluated by Lugano criteria at the end of induction (EOI) after 8 cycles of ATE, OBI and VEN (M6) or at premature treatment discontinuation. Results: At the time of the primary analysis (08 Jan 2021), 78 patients were enrolled. FL cohort (n = 58): the median follow-up was 14.5 months. Main baseline characteristics were: Ann Arbor Stage III/IV, 85.7%; FLIPI HR, 47.3%; > 2 prior lines of therapy, 32.1%; and exposed to ASCT, 30.4%. The ORR on PET scan at EOI was measured at 53.6% [41.8%-65.1%], including 30.4% of CMR. 37 patients (63%) received the full induction treatment. MZL cohort (n = 20; 13 nMZL, 5 eMZL, 2 sMZL): the median follow-up was 11.9 months. Main baseline characteristics were: Ann Arbor Stage IV, 100%; bone marrow infiltration, 38.9%; ≥ 2 extra-nodal sites, 50%; and > 2 prior lines of therapy, 22.2%. The ORR on CT scan at EOI was measured at 66.76% [44.6%-84.4%], including 16.7% of CR and 50.0% PR. 11 patients (55%) received the full induction treatment. At time of the present analysis, responses in the 2 cohorts seem durable with only 21,4% of responders who have reported relapse/progression. Out of the 78 pts, a total of 55 (70.5%) pts experienced grade 3–4 adverse event (AE) and 1 patient experienced an AE that led to discontinuation of any drug. Main AE of grade 3 or more were hematologic cytopenias, with only one febrile neutropenia (1.3%). Three pts experienced immune-related AE (1 grade 2 myositis and 2 grade 3 colitis), no tumor lysis syndrome was observed. Conclusions: ATE, OBI and VEN triplet appears to be well tolerated, with no unexpected toxicity brought by the combination. The ORR at EOI seems to be comparable to other innovative regiments in this setting, with durable responses to date. Clinical trial information: NCT03276468.

Three-year follow-up of ATTRACTION-3: A phase III study of nivolumab (Nivo) in patients with advanced esophageal squamous cell carcinoma (ESCC) that is refractory or intolerant to previous chemotherapy.

2021 ◽  
Vol 39 (3_suppl) ◽  
pp. 204-204
Author(s):  
Keisho Chin ◽  
Ken Kato ◽  
Byoung Chul Cho ◽  
Masanobu Takahashi ◽  
Morihito Okada ◽  
...  
Keyword(s):  
Overall Survival ◽  
Subgroup Analysis ◽  
Survival Data ◽  
Special Interest ◽  
Safety Data ◽  
Phase Iii ◽  
Taxane Chemotherapy ◽  
Favorable Safety ◽  
Safety Signals

204 Background: Previous results from the ATTRACTION-3 phase 3 trial demonstrated a significant improvement in overall survival and a favorable safety profile compared with taxane chemotherapy (CT) in previously-treated ESCC patients. To our knowledge, no long-term efficacy and safety data of this immune checkpoint inhibitor has been reported in ESCC. Herein, we report the three-year survival data of Nivo in ESCC. Methods: In ATTRACTION-3, 419 patients with unresectable advanced or recurrent ESCC refractory or intolerant to 1 prior fluoropyrimidine/platinum-based CT were randomized in a 1:1 ratio to receive Nivo (N = 210) or the investigator’s choice of CT (paclitaxel or docetaxel) (N = 209) until disease progression or unacceptable toxicity. The primary endpoint was overall survival (OS). A subgroup analysis of OS according to the best overall response (BOR) was performed. The onset of treatment-related adverse events of special interest over time in the Nivo arm was also evaluated. Results: As of data cut-off on 25 May 2020, 3 years after the last patient was enrolled, the median OS (mOS) was 10.91 months with Nivo versus 8.51 months with CT [hazard ratio (HR) 0.79; 95% confidence interval (CI) 0.64-0.97]. The OS rates of patients with Nivo and CT were 20.2 % and 13.5 % at 24 months, and 15.3% and 8.7% at 36 months, respectively. In the subgroup analysis of OS by BOR, mOS in CR/PR patients were 19.91 and 15.41 months (HR 0.84, 95%CI 0.46-1.54) and that in SD patients were 17.38 and 9.36 months (HR 0.45, 95%CI 0.26-0.78) in the Nivo and CT arm, respectively. Furthermore, mOS in PD patients were 10.91 and 6.18 months (HR 0.56, 95%CI 0.33-0.95) in the Nivo and CT arm, respectively. No new safety signals were detected during the three-year follow-up. Time to onset of the event of special interest was within the range of events previously observed in other indications. Conclusions: At three-year follow up, Nivo continued to show improved OS over CT in pretreated patients with advanced ESCC patients. Nivo showed a longer mOS than CT regardless of BOR. During the three-year follow-up, no new safety signals were observed. Clinical trial information: NCT02569242.

scholarly journals A phase 1 and randomized, placebo‐controlled phase 2 trial of bevacizumab plus dasatinib in patients with recurrent glioblastoma: Alliance/North Central Cancer Treatment Group N0872

Cancer ◽  
2019 ◽  
Vol 125 (21) ◽  
pp. 3790-3800 ◽  
Author(s):  
Evanthia Galanis ◽  
S. Keith Anderson ◽  
Erin L. Twohy ◽  
Xiomara W. Carrero ◽  
Jesse G. Dixon ◽  
...  
Keyword(s):  
Treatment Group ◽  
Cancer Treatment ◽  
Phase 1 ◽  
Recurrent Glioblastoma ◽  
Phase 2 ◽  
North Central ◽  
Phase 2 Trial

Evaluation of controlled IL-12 in combination with a PD-1 inhibitor in subjects with recurrent glioblastoma.

2019 ◽  
Vol 37 (15_suppl) ◽  
pp. 2020-2020 ◽  
Author(s):  
E. Antonio Chiocca ◽  
Rimas Vincas Lukas ◽  
Ganesh Rao ◽  
John A. Barrett ◽  
Jill Y. Buck ◽  
...  
Keyword(s):  
T Cells ◽  
T Cell ◽  
Cytotoxic T Cells ◽  
Phase 1 ◽  
Safety Data ◽  
Recurrent Glioblastoma ◽  
Therapeutic Window ◽  
Open Label ◽  
Median Baseline ◽  
Immune Mediated

2020 Background: Ad-RTS-hIL-12 (Ad) is a novel gene therapy candidate conditionally expressing IL-12 under the control of veledimex (V) acting via the proprietary RheoSwitch Therapeutic System (RTS) gene switch with a therapeutic window. Intratumoral Ad + oral V monotherapy (Phase 1 study, NCT02026271 ) resulted in a new sustained intra-tumor influx of activated cytotoxic T cells, consistent with an immune-mediated anti-tumor effect improving median overall survival (mOS) of subjects with recurrent glioblastoma (rGBM). This correlated with an increased circulating CD8+/FoxP3+ T cell ratio (“cytoindex”), an emerging biomarker for mOS. PD-1 expression on infiltrating T cells at biopsy after Ad+V, supports combining controlled IL-12 with a PD-1 inhibitor to further augment T-cell-mediated anti-tumor effects. The rationale is also supported by increased OS (100% combo vs 63% for Ad+V vs 40% for anti-PD-1) in mice bearing GL-261 glioma. Methods: An ongoing open label, dose-escalation Phase 1 trial (NCT03636477) is evaluating safety and tolerability of local, controlled IL-12 with nivolumab (nivo) in adult subjects with rGBM. Ad was administered by single intratumoral injection (2 x 1011 viral particles, Day 0) plus V (10-20 mg) PO QD x 15 with nivo (1-3mg/kg) IV on Days -7, 15, then Q2W. Results: Safety data revealed a similar profile as Ad +V monotherapy. Adverse reactions (ARs) during follow-on nivo dosing were consistent with anti-PD-1 reports. ARs were manageable and reversible with no synergistic toxicities. Nivo alone did not alter peripheral IL-12 levels (median baseline (before anti-PD-1) 0.9 pg/mL; Day 0 1 pg/mL) increasing to 5.5 pg/mL on Day 3. Nivo alone increased peripheral T cells (CD3+CD8+ median baseline 23%; Day 0 26%) and Ad+V elevated peripheral CD3+CD8+ to 31% at Day 14. Nivo alone decreased regulatory T cells (FoxP3 baseline 1.5% vs Day 0 0.8%). Ad+V decreased these to 0.3% (Day 14). Combination therapy improved the cytoindex (baseline 15; Day 0 29; Day 14 80). Conclusions: Controlled IL-12 production using Ad + V with nivo is a rational combination with initial data consistent with immune-mediated anti-tumor effects with a favorable safety profile, warranting continued investigation in rGBM. Clinical trial information: NCT03636477.

Safety of TG-C: 12 years of follow-up safety data from phase 1, phase 2, ongoing phase 3, and long term safety trials

2021 ◽  
Vol 29 ◽  
pp. S253-S254
Author(s):  
D. Hunter ◽  
A. Mobasheri ◽  
S. Mareya ◽  
M. Wang ◽  
H. Choi ◽  
...  
Keyword(s):  
Phase 1 ◽  
Safety Data ◽  
Phase 2 ◽  
Phase 3 ◽  
Ongoing Phase

Controlled IL-12 in combination with a PD-1 inhibitor subjects with recurrent glioblastoma.

2020 ◽  
Vol 38 (15_suppl) ◽  
pp. 2510-2510
Author(s):  
E. Antonio Chiocca ◽  
Rimas Vincas Lukas ◽  
Clark C Chen ◽  
Ganesh Rao ◽  
Christina Amidei ◽  
...  
Keyword(s):  
T Cells ◽  
Transcriptional Control ◽  
Phase 1 ◽  
Safety Data ◽  
Intratumoral Injection ◽  
Recurrent Glioblastoma ◽  
Phase 2 ◽  
Open Label ◽  
Rational Combination ◽  
Circulating T Cells

2510 Background: Monotherapy with intratumoral Ad-RTS-hIL-12 (Ad), a gene therapeutic conditionally expressing IL-12 under the transcriptional control of oral veledimex (“Controlled IL-12”), was shown in a phase 1 study (NCT02026271) to elicit a new and sustained intra-tumoral infiltration of T cells with co-expression of PD-1. We report updated findings following completion of enrollment (with follow-up ongoing) for a phase 1 substudy (NCT03636477) evaluating safety and tolerability of local, Controlled IL-12 in combination with nivolumab (nivo) in adults with recurrent glioblastoma (rGBM). Methods: Multicenter, open label, dose-escalation phase 1 trial to evaluate safety and tolerability of local, Controlled IL-12 with nivo in adult subjects with rGBM. Ad was administered by single intratumoral injection (2 x 1011 viral particles, Day 0 at time of resection) plus V (10 or 20 mg) PO QD x 15 with nivo (1 or 3 mg/kg) IV on Days -7, 15, then Q2W. Results: 21 subjects were treated (Cohort 1: V 10 mg, nivo 1 mg/kg, n = 3; Cohort 2: V 10 mg, nivo 3 mg/kg, n = 3; and Cohort 3: V 20 mg, nivo 3 mg/kg, n = 3 + 12 expansion). Safety data were similar to Ad+V monotherapy. Adverse reactions during follow-on nivo dosing were consistent with anti-PD-1 labeling, manageable, and generally reversible with no synergistic toxicities. Focusing on the 20mg V cohort (recommended phase 2 dose), serum IL-12 mean ± SEM (screening, 0.4 ± 0.1 pg/mL; Day 0, 0.6 ± 0.1 pg/mL), increased after Ad+V to 8.7 ± 3.3 pg/mL on Day 3. Similarly, serum IFN-g levels did not increase due to nivo alone (screening, 0 ± 0 pg/mL; Day 0, 0 ± 0 pg/mL), increasing after Ad+V to 6.2 ± 2.3 pg/mL on Day 7. Additionally, nivo alone did not significantly increase circulating T cells (CD3+ CD8+%) (paired differences comparison, Day 0 to screening) 3.1%, p =0.13, whereas Ad+V significantly increased peripheral T cells (Day 28 - Day 0) 3.6%, p =0.02. Pseudoprogression followed by a decrease in size (SPD) has been shown as evidenced by serial MRIs in a subgroup of subjects. Preliminary overall survival findings will be presented. Conclusions: Controlled IL-12 with PD-1 inhibition is a rational combination with initial data consistent with immune-mediated effects, a favorable safety profile, and early evidence of anti-tumor effects. An additional phase 2 study combining Controlled IL-12 with cemiplimab-rwlc in adults with rGBM is ongoing. Clinical trial information: NCT03636477 .

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