Publications by authors named "Marabelle A"

Background: Nivolumab is an immune checkpoint inhibitor (ICI) that selectively inhibits programmed cell death protein 1 activation, restoring antitumor immunity. ICIs are indicated for various types of advanced solid tumors; however, not all patients benefit from them, and tools that could be used in the clinic to predict response to treatment represent an unmet need. Here we describe the development of a new population pharmacokinetic (PPK) model in patients treated with nivolumab in clinical trials.

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Antagonistic monoclonal antibodies (mAbs) targeting inhibitory immune checkpoints have revolutionized the field of oncology. CTLA-4, PD-1, and LAG3 are three co-inhibitory receptors, which can be expressed by subsets of T cells and which play a role in the regulation of adaptive immune responses. Blocking these immune checkpoints receptors (or their ligands) with antagonistic antibodies can lead to tumor regressions and lasting remissions in some patients with cancer.

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Introduction: Immune checkpoint blockers (ICBs) revolutionized the treatment of patients with advanced non-small cell lung cancer (NSCLC) but only a fraction of them obtain a response, and clinical benefit from these treatments is often difficult to predict. The aim of our study is to unveil the potential implications of antibody response to previous viral infections in predicting response to ICBs in patients with NSCLC.

Methods: Sera from patients treated with ICBs alone, chemotherapy (CT) or a combination of CT-ICBs were analyzed with VirScan (CDI Labs, USA), a high-throughput method that comprehensively analyzes epitope-level antiviral IgG antibodies via programmable phage display and immunoprecipitation sequencing.

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Article Synopsis
  • The study investigated the significance of metabolic tumor volume (tMTV) in patients with advanced non-small cell lung cancer (NSCLC) undergoing immune checkpoint blockade (ICB) therapy, using 18F-FDG-PET/CT scans.
  • It involved 518 patients across multiple institutions and found that those with high tMTV had poorer overall survival when treated with ICBs alone compared to those with low tMTV.
  • The research suggests that high tMTV is associated with increased systemic inflammation and genomic instability, making it a potential biomarker for determining treatment strategies in NSCLC patients with positive PD-L1 expression.
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  • Circulating proteomes can reveal the body's response to diseases like COVID-19 and treatments like tocilizumab, which is used to mitigate severe symptoms.
  • In a study involving 28 hospitalized COVID-19 patients treated with tocilizumab, researchers collected serum samples to analyze changes in protein levels before and after treatment and assessed patient outcomes for 30 days.
  • Findings indicated that specific proteins related to the complement system and Fc-epsilon receptor signaling could predict treatment success and mortality, where high complement activation linked to worse outcomes and certain signaling pathways showed lower mortality rates.
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Background: Advances in precision oncology led to approval of tumour-agnostic molecularly guided treatment options (MGTOs). The minimum requirements for claiming tumour-agnostic potential remain elusive.

Methods: The European Society for Medical Oncology (ESMO) Precision Medicine Working Group (PMWG) coordinated a project to optimise tumour-agnostic drug development.

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  • - AI is changing the game in society and healthcare, particularly in improving precision medicine and enhancing cancer treatment through immunotherapy.
  • - Immunotherapy (IO) offers new treatment methods for cancer but also creates unique response patterns that complicate traditional evaluation techniques.
  • - The editorial discusses how AI can help develop new biomarkers using imaging to better assess patient responses to IO early on, potentially leading to a more precise, non-invasive approach to cancer treatment.
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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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  • 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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Background: POLE and POLD1 proofreading deficiency (POLE/D1pd) define a rare subtype of ultramutated metastatic colorectal cancer (mCRC; over 100 mut/Mb). Disease-specific data about the activity and efficacy of immune checkpoint inhibitors (ICIs) in POLE/D1pd mCRC are lacking and it is unknown whether outcomes may be different from mismatch repair-deficient (dMMR)/microsatellite instability-high (MSI-H) mCRCs treated with ICIs.

Patients And Methods: In this global study, we collected 27 patients with mCRC harboring POLE/D1 mutations leading to proofreading deficiency and treated with anti-programmed cell death-ligand 1 alone +/- anti-cytotoxic T-lymphocyte antigen-4 agents.

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Cibisatamab is a bispecific antibody-based construct targeting carcinoembryonic antigen (CEA) on tumour cells and CD3 epsilon chain as a T-cell engager. Here we evaluated cibisatamab for advanced CEA-positive solid tumours in two open-label Phase 1 dose-escalation and -expansion studies: as a single agent with or without obinutuzumab in S1 (NCT02324257) and with atezolizumab in S2 (NCT02650713). Primary endpoints were safety, dose finding, and pharmacokinetics in S1; safety and dose finding in S2.

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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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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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Background: Immune checkpoint blockers (ICBs) can induce immune-related adverse events (irAEs) whose management is based on expert opinion and may require the prescription of steroids and/or immunosuppressants (ISs). Recent data suggest that these treatments can reduce the effectiveness of ICBs.

Objective: To investigate the relationship between the use of steroids and/or ISs and overall survival (OS) and progression-free survival (PFS) among ICB-treated patients with an irAE.

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Article Synopsis
  • Scientists believe that delivering special medicines directly into tumors could help fight cancer better.
  • An expert group worked together to figure out how to create better tests for these new treatments, including which patients to help.
  • They discussed different ideas on how to design these tests, so they can learn the most about how well the new therapies work for different types of cancer.
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Importance: With the widespread use of immune checkpoint inhibitors (ICIs), concerns about their pregnancy outcomes through maternal exposure have emerged, and clinical comparative data are lacking.

Objective: To assess the risk of pregnancy-, fetal-, and/or newborn-related adverse outcomes associated with exposure to ICIs compared with exposure to other anticancer agents.

Design, Setting, And Participants: In this cohort study, all reports mentioning a pregnancy-related condition and an antineoplastic agent (Anatomical Therapeutic Chemical classification group L01) used for a cancer indication registered in the World Health Organization international pharmacovigilance database VigiBase up to June 26, 2022, were extracted.

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Purpose: We report a 10-year experience in cancer therapy with concomitant treatment of percutaneous thermal ablation (PTA) and immune checkpoint blockers (ICBs).

Material And Methods: This retrospective cohort study included all patients at a single tertiary cancer center who had received ICBs at most 90 days before, or 30 days after, PTA. Feasibility and safety were assessed as the primary outcomes.

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Article Synopsis
  • Recent clinical trials of new immune checkpoint protein-targeted antibodies failed to show significant results, primarily because patients weren't screened for target expression prior to treatment.* -
  • The study utilized advanced methods like flow cytometry and single-cell RNA sequencing to analyze immune checkpoint expression on T-cells from various primary tumors, revealing extensive variability among patients.* -
  • Results indicated that while CD4FoxP3 T-cells co-expressed both stimulatory and inhibitory checkpoints, the expression levels in CD8 T-cells were generally lower, suggesting a need for better-targeted therapies in future cancer immunotherapy trials.*
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Background: Despite the promising efficacy of immune checkpoint blockers (ICB), tumor resistance and immune-related adverse events hinder their success in cancer treatment. To address these challenges, intratumoral delivery of immunotherapies has emerged as a potential solution, aiming to mitigate side effects through reduced systemic exposure while increasing effectiveness by enhancing local bioavailability. However, a comprehensive understanding of the local and systemic distribution of ICBs following intratumoral administration, as well as their impact on distant tumors, remains crucial for optimizing their therapeutic potential.

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  • Circulating senescent CD8 T (Tsen) cells show limited ability to proliferate but maintain their ability to kill cancer cells, and their presence is linked to immunotherapy resistance in advanced non-small cell lung cancer (aNSCLC).
  • The study identified Tsen cells by their high levels of SA-βgal and the transcription factor T-bet, confirming their senescent characteristics, and highlighted cytomegalovirus (CMV) as the only virus associated with their accumulation.
  • CMV contributes to a higher proportion of Tsen cells as cancer progresses and is linked to poorer survival outcomes for patients receiving anti-PD-(L)1 therapy, indicating that CMV plays a key role in driving Tsen
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Background: Our aim was to explore the prognostic value of anthropometric parameters in a large population of patients treated with immunotherapy.

Methods: We retrospectively included 623 patients with advanced non-small cell lung cancer (NSCLC) (n=318) or melanoma (n=305) treated by an immune-checkpoint-inhibitor having a pretreatment (thorax-)abdomen-pelvis CT scan. An external validation cohort of 55 patients with NSCLC was used.

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