Patents by Inventor Samir Cherkaoui

Samir Cherkaoui has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11905323
    Abstract: The invention discloses a recombinant protein (P-selectin glycoprotein ligand-1 and Neural Retina-specific Leucine Zipper) PSGL-1-NRL chimeric protein comprising a Selectin Binding domain and a non-covalent dimerization domain, which is a leucine zipper and is more preferably the leucine zipper domain of the human or mouse Neural Retina-specific Leucine Zipper. The chimeric protein further comprises a covalent dimerization domain with at least one cysteine suitable to form a disulfide bridge with another chimeric protein to form a homodimer. In the chimeric protein, the PSGL-1 domain corresponds to the extracellular region of Human PSGL-1 and is more preferably the selectin binding region of the mature protein. The chimeric protein is correctly post-translationally modified and is efficiently expressed in a mammalian system. It is sulfated, O-linked glycosylated and sialylated and binds P, E and L selectin, allowing in vivo and in vitro targeting for diagnostic or therapeutic purposes.
    Type: Grant
    Filed: May 18, 2022
    Date of Patent: February 20, 2024
    Assignee: Bracco Suisse
    Inventors: Federico Maisano, Federico Crivellin, Thierry Bettinger, Philippe Bussat, Samir Cherkaoui, Christian Koller, Adrian Lobito
  • Publication number: 20230404920
    Abstract: The present invention relates to calibrated (per)fluorocarbon nanodroplets comprising an outer layer and an inner core, said outer layer comprising a biocompatible fluorinated surfactant and said inner core comprising a (per)fluorocarbon. The invention further relates to a method of preparation of said calibrated (per)fluorocarbon nanodroplets through microfluidic technique, and to their use for in vivo or in vitro diagnostic and/or for therapy.
    Type: Application
    Filed: November 11, 2021
    Publication date: December 21, 2023
    Inventors: Romain MELICH, Philippe BUSSAT, Samir CHERKAOUI, Christiane CONTINO-PEPIN, Stéphane DESGRANGES
  • Patent number: 11717570
    Abstract: Lipid formulation particularly for preparing stable gas-filled microvesicles, comprising distearoyl-phosphatidylcholine (DSPC), dipalmitoylphosphatidylethanolamine-PEG5000 (DPPE-PEG5000) and palmitic acid in an advantageous relative molar ratio. The formulation is useful in particular for therapeutic application with ultrasounds.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: August 8, 2023
    Assignee: Bracco Suisse SA
    Inventors: Philippe Bussat, Samir Cherkaoui, David Lazarus, Eric Allémann, Michel Schneider, Christian Guillot
  • Publication number: 20220409749
    Abstract: The present invention generally relates to the field of ultrasound contrast-agents (USCA). In particular, it relates to a freeze-dried composition comprising an amphiphilic material and a mixture of freeze-drying protecting components, which may be reconstituted for preparing a suspension of gas-filled microvesicles with calibrated size, useful in diagnostic or therapeutic applications. It further relates to the method for the preparation of such freeze-dried composition.
    Type: Application
    Filed: June 24, 2020
    Publication date: December 29, 2022
    Applicant: Bracco Suisse SA
    Inventors: Anne LASSUS, Samir CHERKAOUI
  • Publication number: 20220389080
    Abstract: The invention discloses a recombinant protein (P-selectin glycoprotein ligand-1 and Neural Retina-specific Leucine Zipper) PSGL-1-NRL chimeric protein comprising a Selectin Binding domain and a non-covalent dimerization domain, which is a leucine zipper and is more preferably the leucine zipper domain of the human or mouse Neural Retina-specific Leucine Zipper. The chimeric protein further comprises a covalent dimerization domain with at least one cysteine suitable to form a disulfide bridge with another chimeric protein to form a homodimer. In the chimeric protein, the PSGL-1 domain corresponds to the extracellular region of Human PSGL-1 and is more preferably the selectin binding region of the mature protein. The chimeric protein is correctly post-translationally modified and is efficiently expressed in a mammalian system. It is sulfated, O-linked glycosylated and sialylated and binds P, E and L selectin, allowing in vivo and in vitro targeting for diagnostic or therapeutic purposes.
    Type: Application
    Filed: May 18, 2022
    Publication date: December 8, 2022
    Applicant: Bracco Suisse SA
    Inventors: Federico MAISANO, Federico CRIVELLIN, Thierry BETTINGER, Philippe BUSSAT, Samir CHERKAOUI, Christian KOLLER, Adrian LOBITO
  • Publication number: 20220339301
    Abstract: The present invention generally relates to the field of ultrasound contrast-agents (USCA). In particular, it relates to a freeze-dried composition comprising an amphiphilic material and a freeze-drying protecting component, which may be reconstituted for preparing a suspension of gas-filled microvesicles with calibrated size, useful in diagnostic or therapeutic applications. It further relates to the method for the preparation of such freeze-dried composition.
    Type: Application
    Filed: June 24, 2020
    Publication date: October 27, 2022
    Applicant: Bracco Suisse SA
    Inventors: Anne LASSUS, Samir CHERKAOUI
  • Publication number: 20220211850
    Abstract: Lipid formulation particularly for preparing stable gas-filled microvesicles, comprising distearoyl-phosphatidylcholine (DSPC), dipalmitoylphosphatidylethanolamine-PEG5000 (DPPE-PEG5000) and palmitic acid in an advantageous relative molar ratio. The formulation is useful in particular for therapeutic application with ultrasounds.
    Type: Application
    Filed: May 14, 2020
    Publication date: July 7, 2022
    Applicant: Bracco Suisse SA
    Inventors: Philippe Bussat, Samir CHERKAOUI, David LAZARUS, Eric ALLÉMANN, Michel SCHNEIDER, Christian GUILLOT
  • Patent number: 11370826
    Abstract: The invention discloses a recombinant protein (P-selectin glycoprotein ligand-1 and Neural Retina-specific Leucine Zipper) PSGL-1-NRL chimeric protein comprising a Selectin Binding domain and a non-covalent dimerization domain, which is a leucine zipper and is more preferably the leucine zipper domain of the human or mouse Neural Retina-specific Leucine Zipper. The chimeric protein further comprises a covalent dimerization domain with at least one cysteine suitable to form a disulfide bridge with another chimeric protein to form a homodimer. In the chimeric protein, the PSGL-1 domain corresponds to the extracellular region of Human PSGL-1 and is more preferably the selectin binding region of the mature protein. The chimeric protein is correctly post-translationally modified and is efficiently expressed in a mammalian system. It is sulfated, O-linked glycosylated and sialylated and binds P, E and L selectin, allowing in vivo and in vitro targeting for diagnostic or therapeutic purposes.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: June 28, 2022
    Assignee: Bracco Suisse SA
    Inventors: Federico Maisano, Federico Crivellin, Thierry Bettinger, Philippe Bussat, Samir Cherkaoui, Christian Koller, Adrian Lobito
  • Publication number: 20210389320
    Abstract: Formulations of gas-filled microvesicles comprising a ligand, which may advantageously be used in methods for separating cells or biological materials. The formulations comprise a phospholipid and a suitable mixture of a pegylated phospholipid and of a pegylated phospholipid comprising a ligand.
    Type: Application
    Filed: December 19, 2019
    Publication date: December 16, 2021
    Applicant: Bracco Suisse SA
    Inventors: Philippe BUSSAT, Samir CHERKAOUI, David LAZARUS
  • Patent number: 10918605
    Abstract: A method for preparing a suspension of size-controlled microparticles stabilized by a layer of amphiphilic material. The method, which may be applied to preparations using microfluidic techniques, comprises controlling the temperature of the microparticles during the preparation process and preferably while collecting the formed microparticles.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: February 16, 2021
    Assignee: Bracco Suisse SA
    Inventors: Tim Segers, Peter Frinking, Anne Lassus, Philippe Bussat, Emmanuel Gaud, Samir Cherkaoui
  • Publication number: 20190175516
    Abstract: A method for preparing a suspension of size-controlled microparticles stabilized by a layer of amphiphilic material. The method, which may be applied to preparations using microfluidic techniques, comprises controlling the temperature of the microparticles during the preparation process and preferably while collecting the formed microparticles.
    Type: Application
    Filed: August 30, 2017
    Publication date: June 13, 2019
    Applicant: Bracco Suisse SA
    Inventors: Tim SEGERS, Peter FRINKING, Anne LASSUS, Philippe BUSSAT, Emmanuel GAUD, Samir CHERKAOUI
  • Publication number: 20190048062
    Abstract: The invention discloses a recombinant protein (P-selectin glycoprotein ligand-1 and Neural Retina-specific Leucine Zipper) PSGL-1-NRL chimeric protein comprising a Selectin Binding domain and a non-covalent dimerization domain, which is a leucine zipper and is more preferably the leucine zipper domain of the human or mouse Neural Retina-specific Leucine Zipper. The chimeric protein further comprises a covalent dimerization domain with at least one cysteine suitable to form a disulfide bridge with another chimeric protein to form a homodimer. In the chimeric protein, the PSGL-1 domain corresponds to the extracellular region of Human PSGL-1 and is more preferably the selectin binding region of the mature protein. The chimeric protein is correctly post-translationally modified and is efficiently expressed in a mammalian system. It is sulfated, O-linked glycosylated and sialylated and binds P, E and L selectin, allowing in vivo and in vitro targeting for diagnostic or therapeutic purposes.
    Type: Application
    Filed: February 9, 2017
    Publication date: February 14, 2019
    Applicant: Bracco Suisse SA
    Inventors: Federico MAISANO, Federico CRIVELLIN, Thierry BETTINGER, Philippe BUSSAT, Samir CHERKAOUI, Christian KOLLER, Adrian LOBITO
  • Publication number: 20160263254
    Abstract: Peptide vectors having high KDR binding affinity and processes for making such vectors are provided. The peptide vectors may be conjugated to phospholipids and included in ultrasound contrast agent compositions. Such ultrasound contrast agents are particularly useful in therapeutic and diagnostic methods, such as in imaging KDR-containing tissue and in the evaluation and treatment of angiogenic processes associated with neoplastic conditions. The present invention also provides processes for the large scale production of highly pure dimeric and monomeric peptide phospholipid conjugates as well as precursor materials used to form the conjugates. The present invention further provides processes for the large scale production of highly pure peptide phospholipid conjugates which contain very low levels of TFA.
    Type: Application
    Filed: June 1, 2016
    Publication date: September 15, 2016
    Inventors: Philippe BUSSAT, Samir Cherkaoui, Hong Fan, Bernard Lamy, Palaniappa Nanjappan, Radhakrishna K. Pillai, Sibylle Pochon, Bo Song, Rolf E. Swenson
  • Patent number: 9381258
    Abstract: Peptide vectors having high KDR binding affinity and processes for making such vectors are provided. The peptide vectors may be conjugated to phospholipids and included in ultrasound contrast agent compositions. Such ultrasound contrast agents are particularly useful in therapeutic and diagnostic methods, such as in imaging KDR-containing tissue and in the evaluation and treatment of angiogenic processes associated with neoplastic conditions. The present invention also provides processes for the large scale production of highly pure dimeric and monomeric peptide phospholipid conjugates as well as precursor materials used to form the conjugates. The present invention further provides processes for the large scale production of highly pure peptide phospholipid conjugates which contain very low levels of TFA.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: July 5, 2016
    Assignee: Bracco Suisse S.A.
    Inventors: Philippe Bussat, Samir Cherkaoui, Hong (Helen) Fan, Bernard Lamy, Palaniappa Nanjappan, Radhakrishna K. Pillai, Sibylle Pochon, Bo Song, Rolf E. Swenson
  • Patent number: 9333273
    Abstract: Gas-filled microvesicles associated with a polypeptide comprising a sequence of amino acids, said sequence exhibiting binding affinity for selectins, particularly p-selectin. The gas-filled microvesicles can be used in ultrasound imaging.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: May 10, 2016
    Assignee: BRACCO SUISSE S.A.
    Inventors: Thierry Bettinger, Philippe Bussat, Samir Cherkaoui, Irene Guilbert-Brigger, Bernard Lamy
  • Patent number: 9295737
    Abstract: Peptide vectors having high KDR binding affinity and processes for making such vectors are provided. The peptide vectors may be conjugated to phospholipids and included in ultrasound contrast agent compositions. Such ultrasound contrast agents are particularly useful in therapeutic and diagnostic methods, such as in imaging KDR-containing tissue and in the evaluation and treatment of angiogenic processes associated with neoplastic conditions. The present invention also provides processes for the large scale production of highly pure dimeric and monomeric peptide phospholipid conjugates as well as precursor materials used to form the conjugates. The present invention further provides processes for the large scale production of highly pure peptide phospholipid conjugates which contain very low levels of TFA.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: March 29, 2016
    Assignee: BRACCO SUISSE SA
    Inventors: Philippe Bussat, Samir Cherkaoui, Hong (Helen) Fan, Bernard Lamy, Palaniappa Nanjappan, Radhakrishna K. Pillai, Sibylle Pochon, Bo Song, Rolf E. Swenson
  • Publication number: 20160074539
    Abstract: Gas-filled microvesicles associated with a polypeptide comprising a sequence of amino acids, said sequence exhibiting binding affinity for selectins, particularly p-selectin. The gas-filled microvesicles can be used in ultrasound imaging.
    Type: Application
    Filed: October 30, 2015
    Publication date: March 17, 2016
    Applicant: BRACCO SUISSE S.A.
    Inventors: Thierry BETTINGER, Philippe BUSSAT, Samir CHERKAOUI, Irene GUILBERT-BRIGGER, Bernard LAMY
  • Patent number: 9211348
    Abstract: Gas-filled microvesicles associated with a polypeptide comprising a sequence of amino acids, said sequence exhibiting binding affinity for selectins, particularly p-selectin. The gas-filled microvesicles can be used in ultrasound imaging.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: December 15, 2015
    Assignee: BRACCO SUISSE S.A.
    Inventors: Thierry Bettinger, Philippe Bussat, Samir Cherkaoui, Irene Guilbert-Brigger, Bernard Lamy
  • Publication number: 20140206837
    Abstract: Peptide vectors having high KDR binding affinity and processes for making such vectors are provided. The peptide vectors may be conjugated to phospholipids and included in ultrasound contrast agent compositions. Such ultrasound contrast agents are particularly useful in therapeutic and diagnostic methods, such as in imaging KDR-containing tissue and in the evaluation and treatment of angiogenic processes associated with neoplastic conditions. The present invention also provides processes for the large scale production of highly pure dimeric and monomeric peptide phospholipid conjugates as well as precursor materials used to form the conjugates. The present invention further provides processes for the large scale production of highly pure peptide phospholipid conjugates which contain very low levels of TFA.
    Type: Application
    Filed: February 26, 2014
    Publication date: July 24, 2014
    Applicant: BRACCO SUISSE SA
    Inventors: Philippe Bussat, Samir Cherkaoui, Hong (Helen) Fan, Bernard Lamy, Palaniappa Nanjappan, Radhakrishna K. Pillai, Sibylle Pochon, Bo Song, Rolf E. Swenson
  • Publication number: 20140031520
    Abstract: Peptide vectors having high KDR binding affinity and processes for making such vectors are provided. The peptide vectors may be conjugated to phospholipids and included in ultrasound contrast agent compositions. Such ultrasound contrast agents are particularly useful in therapeutic and diagnostic methods, such as in imaging KDR-containing tissue and in the evaluation and treatment of angiogenic processes associated with neoplastic conditions. The present invention also provides processes for the large scale production of highly pure dimeric and monomeric peptide phospholipid conjugates as well as precursor materials used to form the conjugates. The present invention further provides processes for the large scale production of highly pure peptide phospholipid conjugates which contain very low levels of TFA.
    Type: Application
    Filed: July 23, 2013
    Publication date: January 30, 2014
    Applicant: Bracco Suisse SA
    Inventors: Philippe BUSSAT, Samir Cherkaoui, Hong (Helen) Fan, Bernard Lamy, Palaniappa Nanjappan, Radhakrishna K. Pillai, Sibylle Pochon, Bo Song, Rolf E. Swenson