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  1. Article ; Online: Current perspectives for external control arms in oncology clinical trials: Analysis of EMA approvals 2016-2021.

    Wang, Xiaomeng / Dormont, Flavio / Lorenzato, Christelle / Latouche, Aurélien / Hernandez, Ramon / Rouzier, Roman

    Journal of cancer policy

    2023  Volume 35, Page(s) 100403

    Abstract: Leveraging external control data, especially real-world data (RWD), has drawn particular attention in recent years for facilitating oncology clinical development and regulatory decision-making. Medical regulators have published guidance on accelerating ... ...

    Abstract Leveraging external control data, especially real-world data (RWD), has drawn particular attention in recent years for facilitating oncology clinical development and regulatory decision-making. Medical regulators have published guidance on accelerating the use of RWD and external controls. However, few systematic discussions have been conducted on external controls in cancer drug submissions and regulatory feedback. This study aimed to identify European oncology drug approvals using external control data to demonstrate clinical efficacy. We included 18 eligible submissions employing 24 external controls and then discussed the use of external control, data sources, analysis methods, and regulators' feedback. The external controls have been actively submitted to the European Medical Agency (EMA) recently. We found that 17 % of the EMA-approved cancer drugs in 2016-2021 used external controls, among which 37 % of the cases leveraged RWD. However, nearly one-third of the external controls were not considered supportive evidence by EMA due to limitations regarding heterogeneous patient populations, missing outcome assessment in RWD, and inappropriate statistical analysis. This study highlighted that proper use of external controls requires a careful assessment of clinical settings, data availability, and statistical methodology. For better use of external controls in oncology clinical trials, we recommend: prospective study designs to avoid selection bias, sufficient baseline data to ensure the comparability of study populations, consistent endpoint measurements to enable outcome comparison, robust statistical methodology for comparative analysis, and collaborative efforts of sponsors and regulators to establish regulatory frameworks.
    MeSH term(s) Humans ; Prospective Studies ; Neoplasms/drug therapy ; Antineoplastic Agents/therapeutic use ; Medical Oncology ; Drug Approval/methods
    Chemical Substances Antineoplastic Agents
    Language English
    Publishing date 2023-01-14
    Publishing country England
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ISSN 2213-5383
    ISSN (online) 2213-5383
    DOI 10.1016/j.jcpo.2023.100403
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Assessment of Squalene-Adenosine Nanoparticles in Two Rodent Models of Cardiac Ischemia-Reperfusion.

    Brusini, Romain / Tran, Natalie Lan Linh / Cailleau, Catherine / Domergue, Valérie / Nicolas, Valérie / Dormont, Flavio / Calet, Serge / Cajot, Caroline / Jouran, Albin / Lepetre-Mouelhi, Sinda / Laloy, Julie / Couvreur, Patrick / Varna, Mariana

    Pharmaceutics

    2023  Volume 15, Issue 7

    Abstract: Reperfusion injuries after a period of cardiac ischemia are known to lead to pathological modifications or even death. Among the different therapeutic options proposed, adenosine, a small molecule with platelet anti-aggregate and anti-inflammatory ... ...

    Abstract Reperfusion injuries after a period of cardiac ischemia are known to lead to pathological modifications or even death. Among the different therapeutic options proposed, adenosine, a small molecule with platelet anti-aggregate and anti-inflammatory properties, has shown encouraging results in clinical trials. However, its clinical use is severely limited because of its very short half-life in the bloodstream. To overcome this limitation, we have proposed a strategy to encapsulate adenosine in squalene-based nanoparticles (NPs), a biocompatible and biodegradable lipid. Thus, the aim of this study was to assess, whether squalene-based nanoparticles loaded with adenosine (SQAd NPs) were cardioprotective in a preclinical cardiac ischemia/reperfusion model. Obtained SQAd NPs were characterized in depth and further evaluated in vitro. The NPs were formulated with a size of about 90 nm and remained stable up to 14 days at both 4 °C and room temperature. Moreover, these NPs did not show any signs of toxicity, neither on HL-1, H9c2 cardiac cell lines, nor on human PBMC and, further retained their inhibitory platelet aggregation properties. In a mouse model with experimental cardiac ischemia-reperfusion, treatment with SQAd NPs showed a reduction of the area at risk, as well as of the infarct area, although not statistically significant. However, we noted a significant reduction of apoptotic cells on cardiac tissue from animals treated with the NPs. Further studies would be interesting to understand how and through which mechanisms these nanoparticles act on cardiac cells.
    Language English
    Publishing date 2023-06-21
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527217-2
    ISSN 1999-4923
    ISSN 1999-4923
    DOI 10.3390/pharmaceutics15071790
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Squalene-based nanoparticles for the targeting of atherosclerotic lesions.

    Brusini, Romain / Dormont, Flavio / Cailleau, Catherine / Nicolas, Valerie / Peramo, Arnaud / Varna, Mariana / Couvreur, Patrick

    International journal of pharmaceutics

    2020  Volume 581, Page(s) 119282

    Abstract: Native low-density lipoproteins (LDL) naturally accumulate at atherosclerotic lesions and are thought to be among the main drivers of atherosclerosis progression. Numerous nanoparticular systems making use of recombinant lipoproteins have been developed ... ...

    Abstract Native low-density lipoproteins (LDL) naturally accumulate at atherosclerotic lesions and are thought to be among the main drivers of atherosclerosis progression. Numerous nanoparticular systems making use of recombinant lipoproteins have been developed for targeting atherosclerotic plaque. These innovative formulations often require complicated purification and synthesis procedures which limit their eventual translation to the clinics. Recently, squalenoylation has appeared as a simple and efficient technique for targeting agents to endogenous lipoproteins through a bioconjugation approach. In this study, we have developed a fluorescent squalene bioconjugate to evaluate the biodistribution of squalene-based nanoparticles in an ApoE
    MeSH term(s) Animals ; Atherosclerosis/drug therapy ; Atherosclerosis/metabolism ; Atherosclerosis/pathology ; Drug Delivery Systems/methods ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Nanoparticles/administration & dosage ; Nanoparticles/metabolism ; RAW 264.7 Cells ; Rhodamines/administration & dosage ; Rhodamines/metabolism ; Squalene/administration & dosage ; Squalene/metabolism
    Chemical Substances Rhodamines ; Squalene (7QWM220FJH) ; rhodamine B (K7G5SCF8IL)
    Language English
    Publishing date 2020-04-04
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 428962-6
    ISSN 1873-3476 ; 0378-5173
    ISSN (online) 1873-3476
    ISSN 0378-5173
    DOI 10.1016/j.ijpharm.2020.119282
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Squalene-based multidrug nanoparticles for improved mitigation of uncontrolled inflammation in rodents.

    Dormont, Flavio / Brusini, Romain / Cailleau, Catherine / Reynaud, Franceline / Peramo, Arnaud / Gendron, Amandine / Mougin, Julie / Gaudin, Françoise / Varna, Mariana / Couvreur, Patrick

    Science advances

    2020  Volume 6, Issue 23, Page(s) eaaz5466

    Abstract: Uncontrolled inflammatory processes are at the root of numerous pathologies. Most recently, studies on confirmed COVID-19 cases have suggested that mortality might be due to virally induced hyperinflammation. Uncontrolled pro-inflammatory states are ... ...

    Abstract Uncontrolled inflammatory processes are at the root of numerous pathologies. Most recently, studies on confirmed COVID-19 cases have suggested that mortality might be due to virally induced hyperinflammation. Uncontrolled pro-inflammatory states are often driven by continuous positive feedback loops between pro-inflammatory signaling and oxidative stress, which cannot be resolved in a targeted manner. Here, we report on the development of multidrug nanoparticles for the mitigation of uncontrolled inflammation. The nanoparticles are made by conjugating squalene, a natural lipid, to adenosine, an endogenous immunomodulator, and then encapsulating α-tocopherol, as antioxidant. This resulted in high drug loading, biocompatible, multidrug nanoparticles. By exploiting the endothelial dysfunction at sites of acute inflammation, these multidrug nanoparticles delivered the therapeutic agents in a targeted manner, conferring survival advantage to treated animals in models of endotoxemia. Selectively delivering adenosine and antioxidants together could serve as a novel therapeutic approach for safe treatment of acute paradoxal inflammation.
    MeSH term(s) Adenosine/administration & dosage ; Adenosine/chemistry ; Animals ; Antioxidants/administration & dosage ; Antioxidants/chemistry ; Betacoronavirus ; COVID-19 ; Coronavirus Infections/drug therapy ; Coronavirus Infections/pathology ; Coronavirus Infections/virology ; Disease Models, Animal ; Drug Delivery Systems/methods ; Endotoxemia/chemically induced ; Endotoxemia/drug therapy ; Female ; Immunologic Factors/administration & dosage ; Immunologic Factors/chemistry ; Lipopolysaccharides/pharmacology ; Male ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Nanoparticles/administration & dosage ; Nanoparticles/chemistry ; Pandemics ; Pneumonia, Viral/drug therapy ; Pneumonia, Viral/pathology ; Pneumonia, Viral/virology ; SARS-CoV-2 ; Squalene/administration & dosage ; Squalene/chemistry ; Systemic Inflammatory Response Syndrome/chemically induced ; Systemic Inflammatory Response Syndrome/drug therapy ; Treatment Outcome ; alpha-Tocopherol/administration & dosage ; alpha-Tocopherol/chemistry
    Chemical Substances Antioxidants ; Immunologic Factors ; Lipopolysaccharides ; Squalene (7QWM220FJH) ; alpha-Tocopherol (H4N855PNZ1) ; Adenosine (K72T3FS567)
    Keywords covid19
    Language English
    Publishing date 2020-06-05
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2810933-8
    ISSN 2375-2548 ; 2375-2548
    ISSN (online) 2375-2548
    ISSN 2375-2548
    DOI 10.1126/sciadv.aaz5466
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Translation of nanomedicines from lab to industrial scale synthesis: The case of squalene-adenosine nanoparticles

    Dormont, Flavio / Rouquette, Marie / Mahatsekake, Clement / Gobeaux, Frédéric / Peramo, Arnaud / Brusini, Romain / Calet, Serge / Testard, Fabienne / Lepetre-Mouelhi, Sinda / Desmaële, Didier / Varna, Mariana / Couvreur, Patrick

    Journal of controlled release. 2019 Aug. 10, v. 307

    2019  

    Abstract: A large variety of nanoparticle-based delivery systems have become increasingly important for diagnostic and/or therapeutic applications. Yet, the numerous physical and chemical parameters that influence both the biological and colloidal properties of ... ...

    Abstract A large variety of nanoparticle-based delivery systems have become increasingly important for diagnostic and/or therapeutic applications. Yet, the numerous physical and chemical parameters that influence both the biological and colloidal properties of nanoparticles remain poorly understood. This complicates the ability to reliably produce and deliver well-defined nanocarriers which often leads to inconsistencies, conflicts in the published literature and, ultimately, poor translation to the clinics. A critical issue lies in the challenge of scaling-up nanomaterial synthesis and formulation from the lab to industrial scale while maintaining control over their diverse properties. Studying these phenomena early on in the development of a therapeutic agent often requires partnerships between the public and private sectors which are hard to establish.In this study, through the particular case of squalene-adenosine nanoparticles, we reported on the challenges encountered in the process of scaling-up nanomedicines synthesis. Here, squalene (the carrier) was functionalized and conjugated to adenosine (the active drug moiety) at an industrial scale in order to obtain large quantities of biocompatible and biodegradable nanoparticles. After assessing nanoparticle batch-to-batch consistency, we demonstrated that the presence of squalene analogs resulting from industrial scale-up may influence several features such as size, surface charge, protein adsorption, cytotoxicity and crystal structure. These analogs were isolated, characterized by multiple stage mass spectrometry, and their influence on nanoparticle properties further evaluated. We showed that slight variations in the chemical profile of the nanocarrier's constitutive material can have a tremendous impact on the reproducibility of nanoparticle properties. In a context where several generics of approved nanoformulated drugs are set to enter the market in the coming years, characterizing and solving these issues is an important step in the pharmaceutical development of nanomedicines.
    Keywords adenosine ; adsorption ; biodegradability ; colloidal properties ; crystal structure ; cytotoxicity ; drug development ; generic drugs ; markets ; mass spectrometry ; moieties ; nanocarriers ; nanomedicine ; nanoparticles ; squalene
    Language English
    Dates of publication 2019-0810
    Size p. 302-314.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 632533-6
    ISSN 1873-4995 ; 0168-3659
    ISSN (online) 1873-4995
    ISSN 0168-3659
    DOI 10.1016/j.jconrel.2019.06.040
    Database NAL-Catalogue (AGRICOLA)

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  6. Article: Squalene-based multidrug nanoparticles for improved mitigation of uncontrolled inflammation in rodents

    Dormont, Flavio / Brusini, Romain / Cailleau, Catherine / Reynaud, Franceline / Peramo, Arnaud / Gendron, Amandine / Mougin, Julie / Gaudin, Françoise / Varna, Mariana / Couvreur, Patrick

    Sci Adv

    Abstract: Uncontrolled inflammatory processes are at the root of numerous pathologies. Most recently, studies on confirmed COVID-19 cases have suggested that mortality might be due to virally induced hyperinflammation. Uncontrolled pro-inflammatory states are ... ...

    Abstract Uncontrolled inflammatory processes are at the root of numerous pathologies. Most recently, studies on confirmed COVID-19 cases have suggested that mortality might be due to virally induced hyperinflammation. Uncontrolled pro-inflammatory states are often driven by continuous positive feedback loops between pro-inflammatory signaling and oxidative stress, which cannot be resolved in a targeted manner. Here, we report on the development of multidrug nanoparticles for the mitigation of uncontrolled inflammation. The nanoparticles are made by conjugating squalene, a natural lipid, to adenosine, an endogenous immunomodulator, and then encapsulating α-tocopherol, as antioxidant. This resulted in high drug loading, biocompatible, multidrug nanoparticles. By exploiting the endothelial dysfunction at sites of acute inflammation, these multidrug nanoparticles delivered the therapeutic agents in a targeted manner, conferring survival advantage to treated animals in models of endotoxemia. Selectively delivering adenosine and antioxidants together could serve as a novel therapeutic approach for safe treatment of acute paradoxal inflammation.
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #602279
    Database COVID19

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  7. Article ; Online: Squalene-based multidrug nanoparticles for improved mitigation of uncontrolled inflammation in rodents

    Dormont, Flavio / Brusini, Romain / Cailleau, Catherine / Reynaud, Franceline / Peramo, Arnaud / Gendron, Amandine / Mougin, Julie / Gaudin, Françoise / Varna, Mariana / Couvreur, Patrick

    Science Advances

    2020  Volume 6, Issue 23, Page(s) eaaz5466

    Abstract: Uncontrolled inflammatory processes are at the root of numerous pathologies. Most recently, studies on confirmed COVID-19 cases have suggested that mortality might be due to virally induced hyperinflammation. Uncontrolled pro-inflammatory states are ... ...

    Abstract Uncontrolled inflammatory processes are at the root of numerous pathologies. Most recently, studies on confirmed COVID-19 cases have suggested that mortality might be due to virally induced hyperinflammation. Uncontrolled pro-inflammatory states are often driven by continuous positive feedback loops between pro-inflammatory signaling and oxidative stress, which cannot be resolved in a targeted manner. Here, we report on the development of multidrug nanoparticles for the mitigation of uncontrolled inflammation. The nanoparticles are made by conjugating squalene, a natural lipid, to adenosine, an endogenous immunomodulator, and then encapsulating α-tocopherol, as antioxidant. This resulted in high drug loading, biocompatible, multidrug nanoparticles. By exploiting the endothelial dysfunction at sites of acute inflammation, these multidrug nanoparticles delivered the therapeutic agents in a targeted manner, conferring survival advantage to treated animals in models of endotoxemia. Selectively delivering adenosine and antioxidants together could serve as a novel therapeutic approach for safe treatment of acute paradoxal inflammation.
    Keywords covid19
    Language English
    Publisher American Association for the Advancement of Science (AAAS)
    Publishing country us
    Document type Article ; Online
    ZDB-ID 2810933-8
    ISSN 2375-2548
    ISSN 2375-2548
    DOI 10.1126/sciadv.aaz5466
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Translation of nanomedicines from lab to industrial scale synthesis: The case of squalene-adenosine nanoparticles.

    Dormont, Flavio / Rouquette, Marie / Mahatsekake, Clement / Gobeaux, Frédéric / Peramo, Arnaud / Brusini, Romain / Calet, Serge / Testard, Fabienne / Lepetre-Mouelhi, Sinda / Desmaële, Didier / Varna, Mariana / Couvreur, Patrick

    Journal of controlled release : official journal of the Controlled Release Society

    2019  Volume 307, Page(s) 302–314

    Abstract: A large variety of nanoparticle-based delivery systems have become increasingly important for diagnostic and/or therapeutic applications. Yet, the numerous physical and chemical parameters that influence both the biological and colloidal properties of ... ...

    Abstract A large variety of nanoparticle-based delivery systems have become increasingly important for diagnostic and/or therapeutic applications. Yet, the numerous physical and chemical parameters that influence both the biological and colloidal properties of nanoparticles remain poorly understood. This complicates the ability to reliably produce and deliver well-defined nanocarriers which often leads to inconsistencies, conflicts in the published literature and, ultimately, poor translation to the clinics. A critical issue lies in the challenge of scaling-up nanomaterial synthesis and formulation from the lab to industrial scale while maintaining control over their diverse properties. Studying these phenomena early on in the development of a therapeutic agent often requires partnerships between the public and private sectors which are hard to establish. In this study, through the particular case of squalene-adenosine nanoparticles, we reported on the challenges encountered in the process of scaling-up nanomedicines synthesis. Here, squalene (the carrier) was functionalized and conjugated to adenosine (the active drug moiety) at an industrial scale in order to obtain large quantities of biocompatible and biodegradable nanoparticles. After assessing nanoparticle batch-to-batch consistency, we demonstrated that the presence of squalene analogs resulting from industrial scale-up may influence several features such as size, surface charge, protein adsorption, cytotoxicity and crystal structure. These analogs were isolated, characterized by multiple stage mass spectrometry, and their influence on nanoparticle properties further evaluated. We showed that slight variations in the chemical profile of the nanocarrier's constitutive material can have a tremendous impact on the reproducibility of nanoparticle properties. In a context where several generics of approved nanoformulated drugs are set to enter the market in the coming years, characterizing and solving these issues is an important step in the pharmaceutical development of nanomedicines.
    MeSH term(s) Adenosine/administration & dosage ; Adenosine/chemistry ; Adsorption ; Animals ; Blood Proteins/chemistry ; Cell Line ; Cell Survival/drug effects ; Male ; Mice ; Nanomedicine ; Nanoparticles/administration & dosage ; Nanoparticles/chemistry ; Rats, Sprague-Dawley ; Squalene/administration & dosage ; Squalene/chemistry
    Chemical Substances Blood Proteins ; Squalene (7QWM220FJH) ; Adenosine (K72T3FS567)
    Language English
    Publishing date 2019-06-29
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 632533-6
    ISSN 1873-4995 ; 0168-3659
    ISSN (online) 1873-4995
    ISSN 0168-3659
    DOI 10.1016/j.jconrel.2019.06.040
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Mechanistic understanding of in vivo protein corona formation on polymeric nanoparticles and impact on pharmacokinetics.

    Bertrand, Nicolas / Grenier, Philippe / Mahmoudi, Morteza / Lima, Eliana M / Appel, Eric A / Dormont, Flavio / Lim, Jong-Min / Karnik, Rohit / Langer, Robert / Farokhzad, Omid C

    Nature communications

    2017  Volume 8, Issue 1, Page(s) 777

    Abstract: In vitro incubation of nanomaterials with plasma offer insights on biological interactions, but cannot fully explain the in vivo fate of nanomaterials. Here, we use a library of polymer nanoparticles to show how physicochemical characteristics influence ... ...

    Abstract In vitro incubation of nanomaterials with plasma offer insights on biological interactions, but cannot fully explain the in vivo fate of nanomaterials. Here, we use a library of polymer nanoparticles to show how physicochemical characteristics influence blood circulation and early distribution. For particles with different diameters, surface hydrophilicity appears to mediate early clearance. Densities above a critical value of approximately 20 poly(ethylene glycol) chains (MW 5 kDa) per 100 nm
    MeSH term(s) Adsorption ; Animals ; Apolipoproteins/metabolism ; Complement Activation ; Complement C3/genetics ; Complement C3/metabolism ; Drug Delivery Systems ; Hydrophobic and Hydrophilic Interactions ; Male ; Mice ; Mice, Knockout ; Nanoparticles/administration & dosage ; Nanoparticles/chemistry ; Particle Size ; Polyethylene Glycols/administration & dosage ; Polyethylene Glycols/chemistry ; Protein Corona/metabolism ; Rats ; Rats, Sprague-Dawley ; Receptors, LDL/metabolism ; Surface Properties
    Chemical Substances Apolipoproteins ; C3 protein, mouse ; Complement C3 ; Protein Corona ; Receptors, LDL ; Polyethylene Glycols (30IQX730WE)
    Language English
    Publishing date 2017-10-03
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ISSN 2041-1723
    ISSN (online) 2041-1723
    DOI 10.1038/s41467-017-00600-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Mechanistic understanding of in vivo protein corona formation on polymeric nanoparticles and impact on pharmacokinetics

    Nicolas Bertrand / Philippe Grenier / Morteza Mahmoudi / Eliana M. Lima / Eric A. Appel / Flavio Dormont / Jong-Min Lim / Rohit Karnik / Robert Langer / Omid C. Farokhzad

    Nature Communications, Vol 8, Iss 1, Pp 1-

    2017  Volume 8

    Abstract: Understanding the interaction between nanoparticles and biomolecules is crucial for improving current drug-delivery systems. Here, the authors shed light on the essential role of the surface and other physicochemical properties of a library of ... ...

    Abstract Understanding the interaction between nanoparticles and biomolecules is crucial for improving current drug-delivery systems. Here, the authors shed light on the essential role of the surface and other physicochemical properties of a library of nanoparticles on their in vivo pharmacokinetics.
    Keywords Science ; Q
    Language English
    Publishing date 2017-10-01T00:00:00Z
    Publisher Nature Publishing Group
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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