Patents by Inventor Afaf Helmy El-Sagheer

Afaf Helmy El-Sagheer 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: 11110114
    Abstract: The present disclosure relates to novel dinucleotides comprising at least two locked nucleosides, one of which is directly attached to the 3? end of the triazole linker moiety and the other of which is directly linked to the 5? end of the triazole linker moiety and that are useful for the preparation of oligonucleotides. The disclosed dinucleotides may be used in gene therapy.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: September 7, 2021
    Assignee: Oxford University Innovation Limited
    Inventors: Tom Brown, Afaf Helmy El-Sagheer, Pawan Kumar
  • Patent number: 11104700
    Abstract: The present invention relates to novel oligonucleotides comprising at least one locked nucleoside and at least one triazole inter-nucleoside linkage linkage of Formula A or Formula B and methods of making the same.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: August 31, 2021
    Assignee: Oxford University Innovation Limited
    Inventors: Tom Brown, Afaf Helmy El-Sagheer, Pawan Kumar
  • Patent number: 10344047
    Abstract: Embodiments are directed to methods for joining oligonucleotides. The methods include joining together one or more oligonucleotides by reacting an alkyne group linked to an oligonucleotide with an azide group linked to an oligonucleotide to form a triazole linkage. The alkyne group is a strained alkyne group. The methods can include ligating together ends of one or more oligonucleotides or cross-linking strands of an oligonucleotide duplex to form the triazole linkage. The methods described allow oligonucleotide strands to be ligated together without the need for a ligase enzyme. The methods can be useful for joining together single strands of DNA, cross-linking complementary strands, cyclizing single and double strands, labeling oligonucleotides with reporter groups, attaching DNA to surfaces, producing analogs of DNA with modified nucleobases and backbones, synthesizing large chemically modified RNA constructs, and creating biochemically active PCR templates.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: July 9, 2019
    Assignee: ATDBIO LTD.
    Inventors: Tom Brown, Afaf Helmy El-Sagheer
  • Publication number: 20190023732
    Abstract: The present invention relates to novel oligonucleotides comprising at least one locked nucleoside and at least one triazole inter-nucleoside linkage.
    Type: Application
    Filed: July 17, 2018
    Publication date: January 24, 2019
    Inventors: Tom BROWN, Afaf Helmy EL-SAGHEER, Pawan KUMAR
  • Publication number: 20190015439
    Abstract: The present invention relates to novel dinucleotides that are useful for the preparation of oligonucleotides. The present invention also relates to novel dinucleotides that are useful therapeutically.
    Type: Application
    Filed: July 17, 2018
    Publication date: January 17, 2019
    Inventors: Tom BROWN, Afaf Helmy EL-SAGHEER, Pawan KUMAR
  • Patent number: 8846883
    Abstract: Oligonucleotide chemistry is central to the advancement of core technologies such as DNA sequencing, forensic and genetic analysis and has impacted greatly on the discipline of molecular biology. Oligonucleotides and their analogues are essential tools in these areas. They are often produced by automated solid-phase phosphoramidite synthesis but it is difficult to synthesize long DNA and RNA sequences by this method. Methods are proposed for ligating oligonucleotides together, in particular the use of an azide-alkyne coupling reaction to ligate the backbones of oligonucleotides together to form longer oligonucleotides that can be synthesized using current phosphoramidite synthesis methods.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: September 30, 2014
    Assignee: University of Southhampton
    Inventors: Tom Brown, Afaf Helmy El-Sagheer
  • Publication number: 20130231473
    Abstract: A method for joining oligonucleotides. The method includes joining together one or more oligonucleotides by reacting an alkyne group lined to an oligonucleotide with an azide group linked to an oligonucleotide to form a triazole linkage. The alkyne group is a strained alkyne group. The method can include ligating together ends of one or more oligonucleotides or cross-linking strands of an oligonucleotide duplex. The methods described allow oligonucleotide strands to be ligated together without the need for a ligase enzyme.
    Type: Application
    Filed: March 1, 2012
    Publication date: September 5, 2013
    Inventors: Tom Brown, Afaf Helmy El-Sagheer
  • Publication number: 20130046084
    Abstract: Oligonucleotide chemistry is central to the advancement of core technologies such as DNA sequencing, forensic and genetic analysis and has impacted greatly on the discipline of molecular biology. Oligonucleotides and their analogues are essential tools in these areas. They are often produced by automated solid-phase phosphoramidite synthesis but it is difficult to synthesize long DNA and RNA sequences by this method. Methods are proposed for ligating oligonucleotides together, in particular the use of an azide-alkyne coupling reaction to ligate the backbones of oligonucleotides together to form longer oligonucleotides that can be synthesized using current phosphoramidite synthesis methods.
    Type: Application
    Filed: March 1, 2012
    Publication date: February 21, 2013
    Inventors: Tom Brown, Afaf Helmy El-Sagheer
  • Publication number: 20130046083
    Abstract: Oligonucleotide chemistry is central to the advancement of core technologies such as DNA sequencing, forensic and genetic analysis and has impacted greatly on the discipline of molecular biology. Oligonucleotides and their analogues are essential tools in these areas. They are often produced by automated solid-phase phosphoramidite synthesis but it is difficult to synthesize long DNA and RNA sequences by this method. Methods are proposed for ligating oligonucleotides together, in particular the use of an azide-alkyne coupling reaction to ligate the backbones of oligonucleotides together to form longer oligonucleotides than can be synthesized using current phosphoramidite synthesis methods.
    Type: Application
    Filed: August 16, 2011
    Publication date: February 21, 2013
    Inventors: Tom Brown, Afaf Helmy El-Sagheer