Publications by authors named "Pletan Y"

Article Synopsis
  • Glenzocimab is a new antithrombotic drug that targets GPVI in platelets and aims to prevent bleeding, potentially addressing complications from SARS-CoV-2 which often causes blood clotting and lung damage.
  • The GARDEN study tested glenzocimab against a placebo in hospitalized COVID-19 patients in Brazil and France, showing no significant difference in clinical progression of respiratory failure between the two groups, but a notable improvement in one specific health measure.
  • Overall, glenzocimab did not increase bleeding risk, but its effectiveness for COVID-19-related acute respiratory distress syndrome wasn't confirmed, prompting further research, particularly in other medical conditions like stroke and cardiovascular issues.
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Introduction: Intramuscular (IM) midazolam is indicated for the treatment of status epilepticus. Administration must be efficient to rapidly terminate prolonged seizures and prevent complications. The objective of this study was to compare, in terms of relative bioavailability and bioequivalence, IM midazolam injection by needle-free auto-injector, in different settings, to IM midazolam injection by a conventional syringe and needle.

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Background: Antagonists of glycoprotein VI-triggered platelet activation used in combination with recanalisation therapies are a promising therapeutic approach in acute ischaemic stroke. Glenzocimab is an antibody fragment that inhibits the action of platelet glycoprotein VI. We aimed to determine and assess the safety and efficacy of the optimal dose of glenzocimab in patients with acute ischaemic stroke eligible to receive alteplase with or without mechanical thrombectomy.

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Article Synopsis
  • Glenzocimab is a humanized monoclonal antibody fragment targeting a key receptor on platelets, aimed at treating acute ischemic stroke by preventing thrombus growth and stability.
  • A phase I study demonstrated that glenzocimab has a dose-proportional pharmacokinetic profile with a two-compartment model, indicating that how the drug behaves in the body is primarily influenced by a person's body weight.
  • Simulation results showed that a 1000-mg infusion of glenzocimab significantly reduces platelet aggregation, suggesting potential efficacy, but further studies in stroke patients are needed to confirm its clinical effectiveness.
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Objective- ACT017 is a novel, first in class, therapeutic antibody to platelet GPVI (glycoprotein VI) with potent and selective antiplatelet effects. This first-in-human, randomized, placebo-controlled phase 1 study was conducted to evaluate the safety, tolerability, pharmacokinetics, and pharmacodynamics of ACT017 in healthy subjects. Approach and Results- Six cohorts of 8 healthy male and female subjects each received ascending single doses of ACT017 (n=6) or placebo (n=2) as a 6-hour intravenous infusion, with ¼ of the total dose administered within 15 minutes and the rest of the dose (¾ of the total dose) administered within 5 hours and 45 minutes.

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In pharmacoepidemiology studies, the nature of the research question will dictate the choice of methodological approach and the conditions for optimizing the level of evidence. Thus, to document the treated population and the modes of use of a new drug in real-life prescribing conditions, a descriptive approach through cross-sectional or longitudinal studies conducted on databases, or else ad-hoc studies, will be preferred. On the other hand, evaluation of the real-life "effectiveness" of a new drug will be based on cohort, case-control or scientific modeling, depending on the drug and the disease of interest.

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Since 2002, the Leem (French Association of Pharmaceutical Companies) has conducted a survey every two years to update the attractiveness of France for international clinical trials. Thirty companies (68% of the French market) have participated in this 6(th) survey which involved 79 countries, a greater number of Phases I/II, II and III studies (420 versus 352 in 2010), a relatively stable number of included patients (246,895 versus 249,704 in 2010) and a greater number of centers (32,965 versus 24,337 in 2010). The evolution of time-lines for the go-ahead by French Authorities is heterogeneous (shorter time-lines by the French National Agency of Drug and Health Products Safety [ANSM] but longer time-lines by Research Ethics Comittees [CPP]).

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In order to evaluate the attractiveness of France for conducting international clinical trials, a survey is performed every two years among pharmaceutical companies that are based in France or have affiliates in France. Twenty-nine companies (72% of the French market) including 10 newly participants, have participated in the current survey which included 328 international phase II and III clinical studies, 79 countries, 24,337 centres and 249,704 patients (included in 2008/2009). France (291 patients/million inhabitants) ranked among the best European recruiters in second position behind Scandinavia.

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The aim of the Round Table was to make recommendations with regard to the imminent revision of the European Directive on clinical drug trials (2001/20/CE). While recognising the importance of compliance with this Directive, which is not optimal in some member states of the European Union, it would be constructive to simplify further and harmonise its application in every country. Without necessarily resorting to a revision, some of the Directive's dispositions could be improved, such as the definition of "investigational medicinal products" (IMP) and what should be considered as "substantial amendements", as well as harmonising and improving the way in which Ethics Committees are run, either on a European Commission level, or by relying more on the European Network of Research Ethics Committees (EUREC) which already exists in several European member states.

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In order to evaluate the attractiveness of France for conducting international clinical trials, a survey is performed every two years among pharmaceutical companies that are based in France or have affiliates in France. Nineteen companies (61.9 % of the French market) have participated in the current survey which included 385 international phase II and III clinical studies, 77 countries, 29,708 centres and 312,835 patients (included in 2006/2007).

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Unlabelled: The general objective of this study was to proceed an inventory of measures which could help to improve the efficiency of clinical research in France.

Method: Thanks to the discussion between the members of the round-table conference (composed of medical doctors (MD)/investigators; hospital managers; representatives of industrial promoters; general practitioners..

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In order to evaluate the attractiveness of France for conducting international clinical trials, a survey is performed every two years among pharmaceutical companies that are based in France or have affiliates in France. Nineteen companies (61.9 % of the French market) have participated in the current survey which included 385 international phase II and III clinical studies, 77 countries, 29,708 centres and 312,835 patients (included in 2006/2007).

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New drug development is a long, expensive and hazardous process especially regarding the final outcome. During the first non-clinical steps, molecules identified as potential candidates are screened for their toxicological profile, which allows to eliminate some but also to identify possible "target" organs. Then clinical trials are conducted, where tolerance profile knowledge is increased through the development with the detection of the most frequent adverse effects (between 1% and 1 per thousand).

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In order to evaluate the attractiveness of France for conducting international clinical trials, a survey is performed every two years among pharmaceutical companies that are based in France or have affiliates in France. Initiated in 2006, the current survey was much more representative than the previous ones with 20 companies accounting for 61% of the French market. This survey included 352 international phase II and III clinical studies carried out in 2004 and 2005, 74 countries, 17 345 centres and 137 989 patients.

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In order to evaluate the attractiveness of France for conducting international clinical trials, a survey is performed every two years among pharmaceutical companies that are based in France or have affiliates in France. Initiated in 2006, the current survey was much more representative than the previous ones with 20 companies accounting for 61% of the French market. This survey included 352 international phase II and III clinical studies carried out in 2004 and 2005, 74 countries, 17 345 centres and 137 989 patients.

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The European Directive on clinical trials of medicinal products will fall within the scope of the legislation of Member States on 1 May 2004. In France, this adaptation will be carried out by a public health bill concerning, among other things, the reform of the current Huriet-Sérusclat law, and by means of regulations. For trials concerning the initial administration of a product to human subjects, the group suggested the following recommendations: In French texts, to include a deadline of 30 days for the initial authorisation by the competent authority (Afssaps [Agence française de sécurité sanitaire des produits de santé]).

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Be it to restore the confused image of clinical research in relation to the lay public, or to develop new ways of accruing healthy volunteers or patients for clinical trials, there is a need to draft some guidance on how best to provide information on research. Although the French legal and regulatory armamentarium in this area is essentially liberal, there is currently little-justified reluctance among study sponsors to advertise publicly. A group of academic and pharmaceutical industry researchers, assembled for a workshop, together with regulators, journalists, representatives from ethics committees, social security, patient and health consumer groups and other French institutional bodies, has suggested the following series of recommendations: there is no need for additional legal or regulatory constraints; sponsors should be aware of and make use of direct public information on trials; a 'good practice charter' on public communication about clinical trials should be developed; all professionals should be involved in this communication platform; communication in the patient's immediate vicinity should be preferred (primary-care physician, local press); clinical databases and websites accessible to professionals, but also to patients and non-professionals, should be developed; genuine instruction on clinical trials for physicians and health professionals unfamiliar with such trials should be developed and disseminated; media groups should receive at least some training in the fundamentals of clinical research.

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The Marketing Authorization (MA) granted to a new molecular entity does not allow for proper anticipation of its future positioning within the therapeutic strategy. A specific methodology should be devised as early as during the pre-MA development phase that could result in an initial positioning that should be subjected to further reappraisal with regard to scientific advances, the arrival of new treatments and further developments with this molecule. A methodology is thus proposed, based on early optimisation of the development plan, the granting of subsequent MAs, and reappraisal of the positioning within the strategy, based on analysis of all available data.

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France ranks third among European countries as regards the level of investment in clinical R&D and, overall, accounts for a contributive effort proportional to the size of its population and pharmaceutical market respectively. However, there is a trend for phase II and III studies to become proportionally fewer than in the past, while the number of phase IV studies is increasing. In a growing proportion of the mega-trials, which are instrumental for establishing evidence-based practice, French experts, investigators and, even more seriously, French patients, are insufficiently represented.

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The concept of preventable iatrogenesis has a high priority for the Conference Nationale de Santé. Its implementation could result in the identification of the main relevant actions to be taken to prevent drug related iatrogenesis. Based on a critical analysis of pharmacovigilance experiences, we propose, a scheme to evaluate the degree of avoidability of adverse drug effects.

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