Publications by authors named "Julien Grenier"

Background: Maintenance niraparib at an individualized starting dose (ISD) is established in platinum-sensitive recurrent ovarian cancer (PSROC). However, patients' perspectives on the burden of prolonged maintenance therapy have not been reported in prospective trials or routine practice.

Methods: In the real-life multicenter NiQoLe study, patients with PSROC received ISD maintenance niraparib.

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  • The LSC-17 score, based on a gene expression profile related to stemness, indicates poor outcomes in acute myeloid leukemia (AML), but how leukemic stem cell anchoring affects disease progression is unclear.
  • Conditional inactivation of the adhesion molecule JAM-C in a mouse model of AML showed that its deletion affected HSC expansion but not disease initiation or progression, revealing insights into leukemic cell behavior in the bone marrow niche.
  • Findings suggest that the AP-1/TNF-α gene signature, which correlated with different prognosis in AML, provides additional prognostic information alongside the LSC-17 score, highlighting the importance of niche interactions in leukemia.
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Background: Early access program (formerly cohort Temporary Authorization for Use) was granted for trastuzumab deruxtecan (T-DXd) in France based on DESTINY-Breast01 trial which demonstrated its efficacy and safety in HER2-positive metastatic/unresectable breast cancer after ≥2 anti-HER2-based regimens received at metastatic stage.

Methods: This multicenter real-world early access program included HER2-positive metastatic/unresectable breast patients pretreated with at least two lines of anti-HER2 regimens who received T-DXd 5.4 mg/kg intravenously in monotherapy every 3 weeks.

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Polycythemia vera (PV) and essential thrombocythemia (ET) are myeloproliferative neoplasms (MPN) characterized by clonal erythrocytosis and thrombocytosis, respectively. The main goal of therapy in PV and ET is to prevent thrombohemorrhagic complications. Despite a debated notion that red blood cells (RBCs) play a passive and minor role in thrombosis, there has been increasing evidence over the past decades that RBCs may play a biological and clinical role in PV and ET pathophysiology.

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Following the results of the IMpassion130 trial, an early access program (EAP) was opened in France, allowing patients with PD-L1-positive advanced triple negative breast cancer (aTNBC) to receive a combination of paclitaxel and atezolizumab as first line therapy. This EAP was later discontinued when the IMpassion131 trial read out with negative results. We performed a retrospective multicentric analysis in patients who were prospectively enrolled in the French EAP.

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Importance: In ERBB2 (formerly HER2)-positive metastatic breast cancer (MBC), combining trastuzumab and pertuzumab with taxane-based chemotherapy is the first line of standard care. Given that trastuzumab plus pertuzumab was proven effective in ERBB2-positive MBC, even without chemotherapy, whether the optimal first-line strategy could be trastuzumab plus pertuzumab alone instead of with chemotherapy is unresolved.

Objective: To assess overall survival (OS) at 2 years and progression-free survival (PFS) for patients randomly assigned to receive first-line pertuzumab plus trastuzumab alone or with chemotherapy followed by trastuzumab and emtansine at progression; PFS of second-line trastuzumab and emtansine treatment following trastuzumab plus pertuzumab; and OS and PFS in the ERBB2-enriched and ERBB2-nonenriched subtypes.

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Introduction: Oncological at home-treatment improves patient quality of life and autonomy but requires close watchfulness of adverse events and compliance to treatment. For nearly ten years, pharmaceutical consultations for home-based anticancer oral therapies patients are proposed on medical request in Avignon-Provence Cancer Institute (ICAP). Organizational changes led us to modify this management by integrating dedicated nurses to create an Oral Therapy Unit (OTU).

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  • The PADA-1 trial investigated the effectiveness of switching therapy in advanced breast cancer patients with rising ESR1 mutations, focusing on the combination of fulvestrant and palbociclib.
  • It involved a randomized, open-label design with 1017 women participating, who were monitored during first-line aromatase inhibitor therapy.
  • The co-primary endpoints included progression-free survival after switching treatment and assessing serious adverse events, with the trial's results aimed at improving treatment strategies for this patient population.
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Purpose: Everolimus, an oral inhibitor of the mammalian target of rapamycin, improves progression-free survival in combination with endocrine therapy (ET) in postmenopausal women with aromatase inhibitor-resistant metastatic breast cancer. However, the benefit of adding everolimus to ET in the adjuvant setting in early breast cancer is unknown.

Patients And Methods: In this randomized double-blind phase III study, women with high-risk, hormone receptor-positive, human epidermal growth factor receptor 2-negative primary breast cancer were randomly assigned to everolimus or placebo for 2 years combined with standard ET.

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  • The choice of reference genes is really important when doing tests called qPCR, which measure gene expression.
  • Some scientists think using new methods like RNA-Seq will help find the best reference genes, but this study shows that how you choose those genes matters more.
  • They tested this idea with two different experiments and found that using regular reference genes can give just as good results as using the genes found through RNA-Seq.
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In the bone marrow (BM) of adult mammals, haematopoietic stem cells (HSCs) are retained in micro-anatomical structures by adhesion molecules that regulate HSC quiescence, proliferation and commitment. During decades, researchers have used engraftment to study the function of adhesion molecules in HSC's homeostasis regulation. Since the 90's, progress in genetically engineered mouse models has allowed a better understanding of adhesion molecules involved in HSCs regulation by BM niches and raised questions about the role of adhesion mechanisms in conferring drug resistance to cancer cells nested in the BM.

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Adolescence is a period of vulnerability for the maturation of gray matter (GM) and also for the onset of psychiatric disorders such as major depressive disorder (MDD), bipolar disorder and schizophrenia. Chronic neuroinflammation is considered to play a role in the etiology of these illnesses. However, the involvement of neuroinflammation in the observed link between regional GM volume reductions and psychiatric symptoms is not established yet.

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Embryonic Dissociated Dorsal Root Ganglia (DRG) cultures are often used to investigate the role of novel molecular pathways or drugs in Schwann cell development and myelination. These cultures largely recapitulate the order of cellular and molecular events that occur in Schwann cells of embryonic nerves. However, the timing of Schwann cell developmental transitions, notably the transition from Schwann Cell Precursors (SCP) to immature Schwann cells (iSC) and then to myelinating Schwann cells, has not been estimated so far in this culture system.

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Flow cytometry has been widely used to detect a single event by means of multiparametric fluorescence measurements. Here we describe a method to analyze subsets of hematopoietic stem and progenitor cells isolated from long bones of mice. We further show that this method allows for comparing JAM-C protein expression between subsets of hematopoietic stem and progenitor cells.

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Introduction: The addition of palbociclib to endocrine therapy has been shown to improve progression free survival in hormone receptor positive metastatic breast cancer patients. This cyclin CDK4/6 inhibitor could expose patients to a grade 3-4 hematological toxicity, leading to treatment discontinuation or treatment interruption that is potentially associated with a lack of efficiency. The aim of this study was to identify predictive factors of severe early hematotoxicity (ESHT).

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Unlabelled: Inflammatory breast cancer (IBC) is a highly aggressive entity with a poor outcome and relative resistance to treatment. Despite progresses achieved during the last decades, the survival remains significantly lower than non-IBC. Recent clinical trials assessing PD-1/PD-L1 inhibitors showed promising results in non-IBC.

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Background: Metastatic breast cancer (MBC) patients experience long survival and report poorer quality of life than localized breast cancer patients. Comprehensive supportive care (CSC) has been shown to improve the quality of life (QoL) of MBC. The respective part of each support care has not been fully examined, and little is known about whether meeting patients' needs is accompanied by decreased unscheduled hospital care (UHC).

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  • - The study aimed to evaluate the effectiveness and safety of combining eribulin with bevacizumab as a first-line treatment for HER2-negative metastatic breast cancer, comparing it to previous regimens like paclitaxel.
  • - In a clinical trial involving 61 women, the combination treatment resulted in a 32% non-progression rate at one year and a median progression-free survival of 8.3 months, indicating promising results.
  • - Adverse effects were reported, with hypertension (39%) and neutropenia (26%) being the most common serious side effects, but overall, the treatment was considered to have an acceptable safety profile with low rates of severe neuropathy.
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Supervised exercise dietary programs are recommended to relieve cancer-related fatigue and weight increase induced by adjuvant treatment of early breast cancer (EBC). As this recommendation lacks a high level of evidence, we designed a multicenter randomized trial to evaluate the impact of an Adapted Physical Activity Diet (APAD) education program on fatigue. We randomized 360 women with EBC who were receiving adjuvant chemotherapy and radiotherapy to APAD or usual care at eight French cancer institutions.

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Grasp55 is a ubiquitous Golgi stacking protein involved in autophagy, protein trafficking, and glucose deprivation sensing. The function of Grasp55 in protein trafficking has been attributed to its PDZ-mediated interaction with the C-terminal PDZ-binding motifs of protein cargos. We have recently shown that such an interaction occurs between Grasp55 and the adhesion molecule Jam-C, which plays a central role in stemness maintenance of hematopoietic and spermatogenic cells.

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  • Diabetes leads to diabetic peripheral neuropathy (DPN), causing changes in peripheral nerves, and this study focuses on the roles of liver X receptor (LXR) signaling and NADPH oxidase-4 (Nox4) in its development.
  • Research using diabetic mouse models and human skin samples shows that reduced LXR and increased Nox4 are linked to nerve damage and myelin gene expression issues in both type 1 and type 2 diabetes.
  • Activating LXR or inhibiting Nox4 improves nerve function and restores important myelin proteins, indicating that targeting this LXR/Nox4 pathway could be a new treatment strategy for DPN.
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Importance: Randomized clinical trials have demonstrated a substantial benefit of adding everolimus to endocrine therapy. Everolimus inhibits the mammalian target of rapamycin complex 1 (mTORC1) complex but not mTORC2, which can set off an activating feedback loop via mTORC2. Vistusertib, a dual inhibitor of mTORC1 and mTORC2, has demonstrated broad activity in preclinical breast cancer models, showing superior activity to everolimus.

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