Publications by authors named "Guillet M"

Background: Ampullary carcinoma (AC) is a rare and severe gastrointestinal cancer with a disease recurrence rate of around 40% after curative-intent surgery and for which the main prognostic factors and adjuvant treatment decision remain a matter of debate.

Patients And Methods: The FFCD-AC cohort is a French nationwide prospective cohort, which included patients with non-metastatic resected AC. The primary objective of this study was to describe prognostic factors associated with disease-free survival (DFS) and overall survival (OS) after pancreaticoduodenectomy (PD) so as to propose a user-friendly score to better estimate the risk of recurrence.

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Context: Recent research and the majority of neuropsychological testing manuals emphasize the importance of establishing a proper relationship between the evaluator and the evaluatee. However, there is relatively little empirical research on this point.

Objectives: The objective of this study was to operationalize empathy in the evaluator/evaluatee relationship during neuropsychological assessment.

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In France, blood donations are tested in pools of 96 samples for parvovirus B19 (B19V) DNA to discard plasma for fractionation when it contains high viral loads. Between January 2015 and March 2024, B19V-positive donations decreased during the COVID-19 pandemic, followed by a strong rebound in 2023 and unusually high circulation during winter 2023/24 (ca 10 times higher December 2023-March 2024 vs the pre-pandemic period). Variations over time are probably related to measures implemented to limit SARS-CoV-2 spread.

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Article Synopsis
  • - Primary hyperoxalurias (PH) are rare genetic disorders that can lead to significant diagnostic delays, adversely affecting patient health outcomes.
  • - A study of 52 patients revealed that adults experienced much longer diagnostic delays (30 years on average) compared to children (1.2 years), with renal colic being the main symptom for adults.
  • - The findings highlight the need for greater awareness among healthcare professionals about these conditions to improve early detection and management, despite existing support structures for rare diseases.
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Chimeric antigen receptor (CAR) T-cells targeting CD19 have been approved for the treatment of relapse/refractory large B-cell lymphoma. Hematotoxicity is the most frequent CAR T-cell-related adverse event. Transfusion support is a surrogate marker of severe cytopenias.

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Abuse has many forms. Its societal impact is substantial. Abused patients are insufficiently identified as such.

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Relapsing-remitting multiple sclerosis progresses by relapse. It is therefore necessary to know how to identify this phenomenon in order to be able to provide the best possible support to patients. The term "relapse" is used to characterize the period of a few days to a few weeks during which an attack of inflammation of the myelin occurs.

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Background: Around 50% of gastric cancers are diagnosed at an advanced stage. Several chemotherapy regimens are now internationally validated. Few data are available on the routine daily management of advanced gastric or gastroesophageal junction cancers.

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Hairy root systems have proven to be a viable alternative for recombinant protein production. For recalcitrant proteins, maximizing the productivity of hairy root cultures is essential. The aim of this study was to optimize a Brassica rapa rapa hairy root process for secretion of alpha- l-iduronidase (IDUA), a biologic of medical value.

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Strategies that individualize the care of cancer patients receiving oral anticancer agents offer opportunities to improve treatment adherence and patient care. However, the impact of digital remote monitoring systems in this setting has not been evaluated. Here, we report the results of a phase 3 trial (CAPRI, NCT02828462) to assess the impact of a nurse navigator-led program on treatment delivery for patients with metastatic cancer.

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Unlabelled: Missense mutations in the polymerase epsilon (POLE) gene have been reported to generate proofreading defects resulting in an ultramutated genome and to sensitize tumors to checkpoint blockade immunotherapy. However, many POLE-mutated tumors do not respond to such treatment. To better understand the link between POLE mutation variants and response to immunotherapy, we prospectively assessed the efficacy of nivolumab in a multicenter clinical trial in patients bearing advanced mismatch repair-proficient POLE-mutated solid tumors.

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Article Synopsis
  • - During the first wave of COVID-19 in spring 2020, the "Institut de Cancérologie des Hospices de Lyon" implemented protective measures that resulted in a decrease in clinical activities compared to winter 2019-2020, including significant drops in surgeries and new patient enrollments for clinical trials.
  • - A retrospective study on cancer patients hospitalized with COVID-19 found that half of the mortality cases were attributed to the virus, primarily affecting older patients (82% over 70) and those with advanced cancer (73% stage IV).
  • - Despite adaptations in treatment routines, IC-HCL maintained most treatment regimens during the pandemic, with notable declines only in clinical trials and certain surgical procedures.
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DFNA25 is an autosomal-dominant and progressive form of human deafness caused by mutations in the SLC17A8 gene, which encodes the vesicular glutamate transporter type 3 (VGLUT3). To resolve the mechanisms underlying DFNA25, we studied phenotypes of mice harbouring the p.A221V mutation in humans (corresponding to p.

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Patients with nonresectable liver metastases from colorectal cancer have few therapeutic options and a dismal prognosis. Although liver transplantation for this indication has historically a poor reputation, recent advances in the field of chemotherapy and immunosuppression have paved the way to revisit the concept. New data have shown promising results that need to be validated in several ongoing clinical trials.

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We report a multicentric retrospective case series of patients with COVID-19 who developed acute kidney injury and/or proteinuria and underwent a kidney biopsy in the Paris and its metropolitan area. Forty-seven patients (80.9% men) with COVID-19 who underwent a kidney biopsy between March 08 and May 19, 2020 were included.

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Literature is scarce on acute ischemia after intra-arterial injection of crushed tablets and no effective medical treatment against the progression of lesions is reported. The only factor able to modify the outcome is the delay between injection and management by a specialized vascular team. Moreover the risk of necrosis seems higher after benzodiazepine intra-arterial injection than with other drugs.

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Introduction: Coronavirus disease 2019 (COVID-19) represents a serious threat to patients on maintenance dialysis. The clinical setting, mortality rate, and prognostic factors in these patients have not been well established.

Methods: We included all dialyzed patients with COVID-19 referred to our dialysis center between March 11 and April 11, 2020.

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Among patients hospitalized for novel coronavirus disease (COVID-19), between 10 and 14% develop an acute kidney injury and around half display marked proteinuria and haematuria. Post-mortem analyses of COVID-19 kidney tissue suggest that renal tubular cells and podocytes are affected. Here we report two cases of collapsing glomerulopathy and tubulointerstitial lesions in living COVID-19 patients.

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Hairy roots derived from the infection of a plant by ) bacteria, can be obtained from a wide variety of plants and allow the production of highly diverse molecules. Hairy roots are able to produce and secrete complex active glycoproteins from a large spectrum of organisms. They are also adequate to express plant natural biosynthesis pathways required to produce specialized metabolites and can benefit from the new genetic tools available to facilitate an optimized production of tailor-made molecules.

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The Brassica rapa hairy root based expression platform, a turnip hairy root based expression system, is able to produce human complex glycoproteins such as the alpha-L-iduronidase (IDUA) with an activity similar to the one produced by Chinese Hamster Ovary (CHO) cells. In this article, a particular attention has been paid to the N- and O-glycosylation that characterize the alpha-L-iduronidase produced using this hairy root based system. This analysis showed that the recombinant protein is characterized by highly homogeneous post translational profiles enabling a strong batch to batch reproducibility.

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CfDNA samples from colon (mCRC) and non-small cell lung cancers (NSCLC) (CIRCAN cohort) were compared using three platforms: droplet digital PCR (ddPCR, Biorad); BEAMing/OncoBEAM™-RAS-CRC (Sysmex Inostics); next-generation sequencing (NGS, Illumina), utilizing the 56G oncology panel (Swift Biosciences). Tissue biopsy and time matched cfDNA samples were collected at diagnosis in the mCRC cohort and during 1st progression in the NSCLC cohort. Excellent matches between cfDNA/FFPE mutation profiles were observed.

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Auditory neuropathy 1 (AUNA1) is a form of human deafness resulting from a point mutation in the 5' untranslated region of the () gene. Notably, the mutation leads to the overexpression of the DIAPH3 protein, a formin family member involved in cytoskeleton dynamics. Through study of diap3-overexpressing transgenic (Tg) mice, we examine in further detail the anatomical, functional, and molecular mechanisms underlying AUNA1.

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Introduction: Gemcitabine-induced thrombotic microangiopathy is a rare event whose management is not yet consensual. The use of eculizumab could be of interest.

Case Report: A 68-year-old woman was treated by gemcitabine as adjuvant chemotherapy of a pancreatic adenocarcinoma.

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Exocytosis at the inner hair cell ribbon synapse is achieved through the functional coupling between calcium channels and glutamate-filled synaptic vesicles. Using membrane capacitance measurements, we investigated whether the actin network regulates the exocytosis of synaptic vesicles at the mouse auditory hair cell. Our results suggest that actin network disruption increases exocytosis and that actin filaments may spatially organize a subfraction of synaptic vesicles with respect to the calcium channels.

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Polyploidy is observed across the tree of life, yet its influence on evolution remains incompletely understood. Polyploidy, usually whole-genome duplication, is proposed to alter the rate of evolutionary adaptation. This could occur through complex effects on the frequency or fitness of beneficial mutations.

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