Publications by authors named "Stephane Champiat"

Concurrent use of medications can modulate the effectiveness of immunotherapy. Although this interaction is well documented for immune checkpoint inhibitors, whether this occurs with new experimental compounds has not been evaluated. A computerized data extraction tool was used to collect clinical data and identify the prescription of a predefined set of medications within 30 days of immunotherapy infusion in the Department of Investigational Cancer Therapeutics at The University of Texas MD Anderson Cancer Center.

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Immune checkpoint blockade (ICB) have revolutionized medical oncology, with the occurrence of cures in situations regarded as palliative. However, most patients develop resistance and the selection of responders remains difficult. The search for predictive biomarkers for immunotherapy has revealed that tertiary lymphoid structures (TLS) in the tumor microenvironment (TME) may be indicative of treatment effectiveness, since they may reflect the presence of an immune infiltrate with an anti-tumor effect.

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Purpose: We report results from two clinical trials of the cyclic dinucleotide stimulator of IFN genes (STING) agonist ulevostinag.

Patients And Methods: In a phase I study (NCT03010176) with an accelerated titration design/modified toxicity probability interval method, participants with advanced/metastatic solid tumors or lymphomas received intratumoral ulevostinag (±intravenous pembrolizumab). In an expansion phase, participants with head and neck squamous cell carcinoma (HNSCC) or triple-negative breast cancer received the combination.

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Background: Data on the use of antibody drug conjugates (ADCs) in older patients are scarce.

Objective: The objective was to study the safety and efficacy of ADCs used in early phase clinical trials in patients aged ≥ 65 years compared with younger patients.

Patients And Methods: All patients enrolled in early phase clinical trials (phase I or II) of ADCs for solid tumors in our institution between November 2014 and May 2023 were included in this retrospective monocentric study.

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Study Aim: Tebentafusp, a bispecific fusion protein consisting of affinity-enhanced T cell receptor fused to anti-CD3 effector, has shown overall survival (OS) benefits across all RECIST response categories, including progressive disease (PD). In a phase 2 trial (NCT02570308) for advanced uveal melanoma (mUM), 35 % of PD patients experienced ≥ 0.5 log ctDNA reduction, resulting in a median overall survival (OS) of ∼17 months, compared to ∼8 months in the non-ctDNA reduction group.

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Purpose: We investigated SAR441000 (mixture of four mRNAs encoding IL-12, single-chain IFN-α-2b, GM-CSF, and IL-15 sushi domain) alone or in combination with cemiplimab in patients with advanced solid tumors.

Patients And Methods: SAR441000 was intratumorally administered weekly in a 4-week cycle in monotherapy and in a 3-week cycle at a predefined dose level with 350 mg cemiplimab (intravenously) every 3 weeks in combination therapy. The primary objective was to determine MTD or maximum administered dose, overall safety, tolerability, and objective response rate of SAR441000.

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E7766 is a novel stimulator of interferon genes (STING) agonist, capable of potent activation of immune cells and generating strong antitumor response in preclinical murine tumor models. Here we present the safety, efficacy, and biomarker results of the first-in-human phase I/Ib study of intratumoral E7766 in patients with advanced solid tumors. Eligible patients with relapsing/refractory cancers (n=24) were enrolled in dose-escalating cohorts to receive intratumoral injections of E7766 from 75 to 1000 µg.

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Artificial intelligence (AI) has become a pivotal tool for medical image analysis, significantly enhancing drug discovery through improved diagnostics, staging, prognostication, and response assessment. At a high level, AI-driven image analysis enables the quantification and synthesis of previously qualitative imaging characteristics, facilitating the identification of novel disease-specific biomarkers, patient risk stratification, prognostication, and adverse event prediction. In addition, AI can assist in response assessment by capturing changes in imaging "phenotype" over time, allowing for optimized treatment plans based on real-time analysis.

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Nanrilkefusp alfa (nanril; SOT101) is an interleukin (IL)-15 receptor βγ superagonist that stimulates natural killer (NK) and CD8 T cells, thereby promoting an innate and adaptive anti-tumor inflammatory microenvironment in mouse tumor models either in monotherapy or combined with an anti-programmed cell death protein 1 (PD-1) antibody. In cynomolgus monkeys, a clinical schedule was identified, which translated into the design of a phase 1/1b clinical trial, AURELIO-03 (NCT04234113). In 51 patients with advanced/metastatic solid tumors, nanril increased the proportions of CD8 T cells and NK cells in peripheral blood and tumors.

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Tarlatamab is a bispecific T-cell engager immunotherapy targeting delta-like ligand 3 (DLL3) and the cluster of differentiation 3 (CD3) molecule. In the phase 2 DeLLphi-301 trial of tarlatamab for patients with previously treated small cell lung cancer, tarlatamab 10 mg every 2 weeks achieved durable responses and encouraging survival outcomes. Analyses of updated safety data from the DeLLphi-301 trial demonstrated that the most common treatment-emergent adverse events were cytokine release syndrome (53%), pyrexia (38%), decreased appetite (36%), dysgeusia (32%), and an emia (30%).

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Article Synopsis
  • Tarlatamab, an immunotherapy targeting delta-like ligand 3, shows promising anticancer effects in small cell lung cancer (SCLC) based on the DeLLphi-300 and DeLLphi-301 trials, with manageable safety profiles.
  • In the extended follow-up of DeLLphi-300, the overall response rate was 25%, with a median duration of response of 11.2 months and a median overall survival of 17.5 months across 152 patients.
  • Among those receiving a specific dose regimen (10 mg every two weeks), 35.3% experienced a response, and notable intracranial tumor shrinkage was found in patients with existing brain lesions, highlighting tarlatam
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  • Patients with advanced tumors in phase I trials often have strong treatment hopes but limited options; local ablative stereotactic radiation therapy (SRT) can help manage disease progression when oligoprogressive resistance occurs.* -
  • A study analyzed 42 patients receiving SRT for oligoprogressive lesions, finding that SRT significantly extended progression-free survival (7.1 months) and time to the next treatment (12.8 months), with no severe toxicities reported.* -
  • The findings suggest that tumor characteristics, like aggressiveness and clonal diversity, can help distinguish between patients needing different management strategies after SRT, potentially enhancing treatment outcomes.*
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Article Synopsis
  • Antibody-drug conjugates (ADCs) are a promising cancer treatment that combines targeted monoclonal antibodies with potent drugs, relying on the expression levels of target proteins in cancer cells for effectiveness.
  • This review analyzes clinical trial results from January 2019 to May 2023, highlighting approved ADCs that show efficacy even in tumors with low levels of target protein expression.
  • It emphasizes the challenges in accurately assessing target protein levels due to inconsistent evaluation methods and the complexity of ADC behavior in the body, advocating for standardized approaches to improve future ADC therapies.
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Purpose: With liquid biopsy's widespread adoption in oncology, an increased number of clonal hematopoiesis-associated mutations (CHm) have been identified in patients with solid tumors. However, its impact on patient outcomes remains unclear. This study aimed to analyze and describe CHm in a cohort of phase I patients.

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T-cell engagers (TCE) are cancer immunotherapies that have recently demonstrated meaningful benefit for patients with hematological malignancies and solid tumors. The anticipated widespread use of T cell engagers poses implementation challenges and highlights the need for guidance to anticipate, mitigate, and manage adverse events. By mobilizing T-cells directly at the contact of tumor cells, TCE mount an obligatory and immediate anti-tumor immune response that could result in diverse reactions and adverse events.

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Chemotherapy associated with Immune Checkpoint Inhibitors is currently the standard of care in several tumor indications. This combination approach improves progression free survival (PFS), overall survival (OS) and complete pathological response (pCR) in several cancer types both in the early and metastatic approaches. However, the distinct spectrum of toxicities between cytotoxic side effects and immune related adverse events (irAEs) with similar clinical presentations and different management strategies remains a challenge in daily practice for healthcare professionals.

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Purpose: In this study, we report the results from the esophageal squamous cell carcinoma (SCC) cohort of a phase II, noncomparative, basket study evaluating the antitumor activity and safety of fibroblast activation protein-IL2 variant (FAP-IL2v) plus atezolizumab in patients with advanced/metastatic solid tumors (NCT03386721).

Patients And Methods: Eligible patients had an Eastern Cooperative Oncology Group performance status of 0 to 1; measurable metastatic, persistent, or recurrent esophageal SCC; progression on ≥1 prior therapy; and were checkpoint inhibitor-naïve. Patients received FAP-IL2v 10 mg plus atezolizumab 1,200 mg intravenously every 3 weeks, or FAP-IL2v weekly for 4 weeks and then every 2 weeks plus atezolizumab 840 mg intravenously every 2 weeks.

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Patients with advanced cancer, previously treated with immune checkpoint blockade therapy, may retain residual treatment when undergoing the initial infusion of experimental monotherapy in phase 1 clinical trials. ANV419, an antibody-cytokine fusion protein, combines interleukin-2 (IL-2) with an anti-IL-2 monoclonal antibody, aiming to stimulate the expansion of CD8 T and natural killer lymphocytes while restricting regulatory T lymphocytes. In the recent publication of the phase 1 dose escalation study of ANV419, a notable gap exists in detailed information regarding patients' prior antitumoral treatments, specifically programmed death-1/programmed death-ligand 1 (PD-1/PD-L1) targeted monoclonal antibodies.

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More than half of cancer cases occur in patients aged 65 years or older. The efficacy and safety of antibody drug conjugates (ADCs) in older patients remains an unclear subject as available evidence is limited. Geriatric population is underrepresented in clinical trials.

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Cancer treatments have recently shifted from broad-spectrum cytotoxic therapies to more focused treatments, maximizing anticancerous activity while reducing toxicity to healthy cells. These modern anticancer therapies (MATs) encompass a wide range of innovative molecules that include immune checkpoint inhibitors and other targeted anticancer therapies, comprising antibody drug conjugates and inhibitors of signal transduction. Some MATs are associated with ocular surface adverse events that can cause severe discomfort and even lead to loss of vision.

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Background: Immune-checkpoint inhibitor (ICI) hepatitis, which does not improve with steroids and requires additional immunosuppressant, is defined as steroid-refractory ICI hepatitis. The outcome of patients with steroid-refractory ICI hepatitis remains poorly determined. Herein, we investigated the incidence, clinical features, and outcome of patients treated with second-line immunosuppressant for steroid-refractory ICI hepatitis.

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Background: Phase I trials historically involved heavily pretreated patients (pts) with no more effective therapeutic options available and with poor expected outcomes. There are scare data regarding profile and outcomes of pts enrolled into modern phase I trials. Here, we sought to provide an overview of pts' profile and outcome into phase I trials at Gustave Roussy (GR).

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Purpose Of Review: This review presents the rationale for intratumoral immunotherapy, technical considerations and safety. Clinical results from the latest trials are provided and discussed.

Recent Findings: Intratumoral immunotherapy is feasible and safe in a wide range of cancer histologies and locations, including lung and liver.

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Immune-related adverse events (irAEs) associated with immune checkpoint inhibitor (ICI) therapy may vary substantially in their clinical presentation, including natural history, outcomes to treatment, and patterns. The application of clinical guidelines for irAE management can be challenging for practitioners due to a lack of common or consistently applied terminology. Furthermore, given the growing body of clinical experience and published data on irAEs, there is a greater appreciation for the heterogeneous natural histories, responses to treatment, and patterns of these toxicities, which is not currently reflected in irAE guidelines.

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