Patents by Inventor Balasingam Radhakrishnan

Balasingam Radhakrishnan 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: 7662773
    Abstract: Modified natriuretic compounds and conjugates thereof are disclosed in the present invention. In particular, conjugated forms of hBNP are provided that include at least one modifying moiety attached thereto. The modified natriuretic compound conjugates retain activity for stimulating cGMP production, binding to NPR-A receptor, and in some embodiments an improved half-life in circulation as compared to unmodified counterpart natriuretic compounds. Oral, parenteral, subcutaneous, and intravenous forms of the compounds and conjugates may be prepared as treatments and/or therapies for heart conditions particularly congestive heart failure. Modifying moieties comprising oligomeric structures having a variety of lengths and configurations are also disclosed. Analogs of the natriuretic compound are also disclosed, having an amino acid sequence that is other than the native sequence.
    Type: Grant
    Filed: November 26, 2003
    Date of Patent: February 16, 2010
    Assignee: Biocon Limited
    Inventors: Kenneth D. James, Balasingam Radhakrishnan, Navdeep B. Malkar, Mark A. Miller, Nnochiri N. Ekwuribe
  • Patent number: 7611864
    Abstract: Methods for synthesizing proinsulin polypeptides are described that include a contacting a proinsulin polypeptide including an insulin polypeptide coupled to one or more peptides by peptide bond(s) capable of being cleaved to yield the insulin polypeptide with an oligomer under conditions sufficient to couple the oligomer to the insulin polypeptide portion of the proinsulin polypeptide and provide a proinsulin polypeptide-oligomer conjugate, and cleaving the one or more peptides from the proinsulin polypeptide-oligomer conjugate to provide the insulin polypeptide-oligomer conjugate. Methods of synthesizing proinsulin polypeptide-oligomer conjugates are also described as are proinsulin polypeptide-oligomer conjugates. Methods of synthesizing C-peptide polypeptide-oligomer conjugates are also described.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: November 3, 2009
    Assignee: Biocon Limited
    Inventors: Balasingam Radhakrishnan, Richard Soltero, Nnochiri N. Ekwuribe
  • Patent number: 7608584
    Abstract: Calcitonin drug-oligomer conjugates that include a calcitonin drug coupled to an oligomer including a single polyalkylene glycol moiety consisting of between 4 and 10 polyalkylene glycol subunits are disclosed. Pharmaceutical compositions including such conjugates and methods of treating bone disorders by administering such conjugates are also disclosed.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: October 27, 2009
    Assignee: Biocon Limited
    Inventors: Nnochiri N. Ekwuribe, Balasingam Radhakrishnan
  • Patent number: 7605123
    Abstract: Fatty acid compositions for administration of of pharmaceutical agents, such as proteins and peptides, protein and peptide conjugates, and/or cation-polypeptide conjugate complexes. In particular, the invention provides a solid pharmaceutical composition formulated for oral administration by ingestion, having from about 0.1 to about 75% w/w fatty acid component, where the fatty acid component comprises saturated or unsaturated C4, C5, C6, C7, C8, C9, C10, C11, or C12 fatty acids and/or salts of such fatty acids; and a therapeutic agent. Further, the invention provides a liquid pharmaceutical composition formulated for oral administration by ingestion, comprising: from about 0.1 to about 10% w/v fatty acid component, where the fatty acid component comprises saturated or unsaturated C4, C5, C6, C7, C8, C9, C10, C11, or C12 fatty acids and/or salts of such fatty acids; and a therapeutic agent.
    Type: Grant
    Filed: July 19, 2005
    Date of Patent: October 20, 2009
    Assignee: Biocon Ltd.
    Inventors: Balasingam Radhakrishnan, Diti Aggarwal, Michelle Ferro, Kenneth D. James, Navdeep B. Malkar, Mark A. Miller, Leo Pavliv, Karen Polowy, Monica Puskas, Nnochiri N. Ekwuribe
  • Patent number: 7470663
    Abstract: A mixture of conjugates in which each conjugate in the mixture comprises an insulin drug coupled to an oligomer that includes a polyalkylene glycol moiety is disclosed. The mixture may exhibit higher in vivo activity than a polydispersed mixture of similar conjugates. The mixture may also be more effective at surviving an in vitro model of intestinal digestion than polydispersed mixtures of similar conjugates. The mixture may also result in less inter-subject variability than polydispersed mixtures of similar conjugates.
    Type: Grant
    Filed: May 4, 2006
    Date of Patent: December 30, 2008
    Assignee: Biocon Limited
    Inventors: Nnochiri N. Ekwuribe, Christopher H. Price, Aslam M. Ansari, Balasingam Radhakrishnan, Amy L. Odenbaugh
  • Patent number: 7423014
    Abstract: Methods of treating diabetes mellitus in a patient in need of such treatment include administering an effective amount of an insulin polypeptide-oligomer conjugate of formula V to the patient in order to treat diabetes mellitus in the patient. Methods according to the present invention may “activate” the liver, potentially restoring normal glucose homeostasis to individuals suffering from diabetes mellitus.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: September 9, 2008
    Assignee: Biocon Limited
    Inventors: Nnochiri N. Ekwuribe, Christopher H. Price, James Gordon Still, Jennifer Ann Filbey, Aslam M. Ansari, Amy L. Odenbaugh, Balasingam Radhakrishnan
  • Patent number: 7381702
    Abstract: Methods of treating diabetes mellitus in a patient in need of such treatment include administering an effective amount of an insulin drug to the patient in order to treat diabetes mellitus in the patient. Methods according to the present invention may “activate” the liver, potentially restoring normal glucose homeostasis to individuals suffering from diabetes mellitus.
    Type: Grant
    Filed: June 15, 2006
    Date of Patent: June 3, 2008
    Assignee: Biocon Limited
    Inventors: Nnochiri N. Ekwuribe, Christopher H. Price, James Gordon Still, Jennifer Ann Filbey, Aslam M. Ansari, Amy L. Odenbaugh, Balasingam Radhakrishnan
  • Patent number: 7368260
    Abstract: Methods for synthesizing proinsulin polypeptides are described that include a contacting a proinsulin polypeptide including an insulin polypeptide coupled to one or more peptides by peptide bond(s) capable of being cleaved to yield the insulin polypeptide with an oligomer under conditions sufficient to couple the oligomer to the insulin polypeptide portion of the proinsulin polypeptide and provide a proinsulin polypeptide-oligomer conjugate, and cleaving the one or more peptides from the proinsulin polypeptide-oligomer conjugate to provide the insulin polypeptide-oligomer conjugate. Methods of synthesizing proinsulin polypeptide-oligomer conjugates are also described as are proinsulin polypeptide-oligomer conjugates. Methods of synthesizing C-peptide polypeptide-oligomer conjugates are also described.
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: May 6, 2008
    Assignee: Biocon Limited
    Inventors: Balasingam Radhakrishnan, Richard Soltero, Nnochiri N. Ekwuribe
  • Patent number: 7312192
    Abstract: Methods for synthesizing proinsulin polypeptides are described that include contacting a proinsulin polypeptide including an insulin polypeptide coupled to one or more peptides by peptide bond(s) capable of being cleaved to yield the insulin polypeptide with an oligomer under conditions sufficient to couple the oligomer to the insulin polypeptide portion of the proinsulin polypeptide and provide a proinsulin polypeptide-oligomer conjugate, and cleaving the one or more peptides from the proinsulin polypeptide-oligomer conjugate to provide the insulin polypeptide-oligomer conjugate. Methods of synthesizing proinsulin polypeptide-oligomer conjugates are also provided as are proinsulin polypeptide-oligomer conjugates. Methods of synthesizing C-peptide polypeptide-oligomer conjugates and other pro-polypeptide-oligomer conjugates are also provided.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: December 25, 2007
    Assignee: Biocon Limited
    Inventors: Balasingam Radhakrishnan, Richard Soltero, Nnochiri N. Ekwuribe, Monica Puskas, Diti Sangal
  • Patent number: 7166571
    Abstract: Methods for synthesizing proinsulin polypeptides are described that include contacting a proinsulin polypeptide including an insulin polypeptide coupled to one or more peptides by peptide bond(s) capable of being cleaved to yield the insulin polypeptide with an oligomer under conditions sufficient to couple the oligomer to the insulin polypeptide portion of the proinsulin polypeptide and provide a proinsulin polypeptide-oligomer conjugate, and cleaving the one or more peptides from the proinsulin polypeptide-oligomer conjugate to provide the insulin polypeptide-oligomer conjugate. Methods of synthesizing proinsulin polypeptide-oligomer conjugates are also provided as are proinsulin polypeptide-oligomer conjugates. Methods of synthesizing C-peptide polypeptide-oligomer conjugates and other pro-polypeptide-oligomer conjugates are also provided.
    Type: Grant
    Filed: March 5, 2003
    Date of Patent: January 23, 2007
    Assignee: Biocon Limited
    Inventors: Richard Soltero, Balasingam Radhakrishnan, Nnochiri N. Ekwuribe
  • Publication number: 20060293219
    Abstract: Methods of treating diabetes mellitus in a patient in need of such treatment include administering an effective amount of an insulin drug to the patient in order to treat diabetes mellitus in the patient. Methods according to the present invention may “activate” the liver, potentially restoring normal glucose homeostasis to individuals suffering from diabetes mellitus.
    Type: Application
    Filed: June 15, 2006
    Publication date: December 28, 2006
    Inventors: Nnochiri Ekwuribe, Christopher Price, James Still, Jennifer Filbey, Aslam Ansari, Amy Odenbaugh, Balasingam Radhakrishnan
  • Publication number: 20060199759
    Abstract: A mixture of conjugates in which each conjugate in the mixture comprises an insulin drug coupled to an oligomer that includes a polyalkylene glycol moiety is disclosed. The mixture may exhibit higher in vivo activity than a polydispersed mixture of similar conjugates. The mixture may also be more effective at surviving an in vitro model of intestinal digestion than polydispersed mixtures of similar conjugates. The mixture may also result in less inter-subject variability than polydispersed mixtures of similar conjugates.
    Type: Application
    Filed: May 4, 2006
    Publication date: September 7, 2006
    Inventors: Nnochiri Ekwuribe, Christopher Price, Aslam Ansari, Balasingam Radhakrishnan, Amy Odenbaugh
  • Patent number: 7084114
    Abstract: A mixture of conjugates in which each conjugate in the mixture comprises an insulin drug coupled to an oligomer that includes a polyalkylene glycol moiety is disclosed. The mixture may exhibit higher in vivo activity than a polydispersed mixture of similar conjugates. The mixture may also be more effective at surviving an in vitro model of intestinal digestion than polydispersed mixtures of similar conjugates. The mixture may also result in less inter-subject variability than polydispersed mixtures of similar conjugates.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: August 1, 2006
    Assignee: Nobex Corporation
    Inventors: Nnochiri N. Ekwuribe, Christopher H. Price, Aslam M. Ansari, Balasingam Radhakrishnan, Amy L. Odenbaugh
  • Publication number: 20060100137
    Abstract: Methods of treating diabetes mellitus in a patient in need of such treatment include administering an effective amount of an insulin drug to the patient in order to treat diabetes mellitus in the patient. Methods according to the present invention may “activate” the liver, potentially restoring normal glucose homeostasis to individuals suffering from diabetes mellitus.
    Type: Application
    Filed: December 21, 2005
    Publication date: May 11, 2006
    Inventors: Nnochiri Ekwuribe, Christopher Price, James Still, Jennifer Filbey, Aslam Ansari, Amy Odenbaugh, Balasingam Radhakrishnan
  • Publication number: 20060018874
    Abstract: Fatty acid compositions for administration of of pharmaceutical agents, such as proteins and peptides, protein and peptide conjugates, and/or cation-polypeptide conjugate complexes. In particular, the invention provides a solid pharmaceutical composition formulated for oral administration by ingestion, having from about 0.1 to about 75% w/w fatty acid component, where the fatty acid component comprises saturated or unsaturated C4, C5, C6, C7, C8, C9, C10, C11, or C12 fatty acids and/or salts of such fatty acids; and a therapeutic agent. Further, the invention provides a liquid pharmaceutical composition formulated for oral administration by ingestion, comprising: from about 0.1 to about 10% w/v fatty acid component, where the fatty acid component comprises saturated or unsaturated C4, C5, C6, C7, C8, C9, C10, C11, or C12 fatty acids and/or salts of such fatty acids; and a therapeutic agent.
    Type: Application
    Filed: July 19, 2005
    Publication date: January 26, 2006
    Inventors: Balasingam Radhakrishnan, Diti Aggarwal, Michelle Ferro, Kenneth James, Navdeep Malkar, Mark Miller, Leo Pavliv, Karen Polowy, Monica Puskas, Nnochiri Ekwuribe
  • Publication number: 20060019874
    Abstract: The invention provides a complex including a cation and an insulin compound conjugate. The insulin compound conjugate includes insulin compound, such as human insulin or an analog thereof, conjugated to a modifying moiety, such as a polyethylene glycol moiety. The invention also includes solids and pharmaceutical compositions including such complexes, methods of making such complexes, and methods of using such complexes in the treatment of insulin compound deficiencies and other ailments. Further, the invention includes novel insulin compound conjugates and modifying moieties for use in making novel insulin compound conjugates. The invention also includes fatty acid compositions for administration of pharmaceutical agents, such as the novel insulin compound conjugates, and/or the cation-insulin compound conjugate complexes of the invention.
    Type: Application
    Filed: July 19, 2005
    Publication date: January 26, 2006
    Inventors: Balasingam Radhakrishnan, Diti Aggarwal, Michelle Ferro, Kenneth James, Navdeep Malkar, Mark Miller, Monica Puskas, Nnochiri Ekwuribe
  • Publication number: 20060019873
    Abstract: An insulin compound coupled to a modifying moiety having a formula: —X—R1—Y-PAG-Z-R??(Formula VI) where, X, Y and Z are independently selected linking groups and each is optionally present, and X, when present, is coupled to the insulin compound by a covalent bond, either R1 or R2 is is a lower alkyl, optionally including a carbonyl group, and when R1 is a lower alkyl, R2 is a capping group, and PAG is a linear or branched carbon chain incorporating one or more alkalene glycol moieties, and optionally incorporating one or more additional moieties selected from the group consisting of —S—, —O—, —N—, and —C(O)—, and where the modifying moiety has a maximum number of 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, or 25 heavy atoms.
    Type: Application
    Filed: July 19, 2005
    Publication date: January 26, 2006
    Inventors: Balasingam Radhakrishnan, Diti Aggarwal, Michelle Ferro, Kenneth James, Navdeep Malkar, Mark Miller, Monica Puskas, Nnochiri Ekwuribe
  • Publication number: 20050277580
    Abstract: Methods for synthesizing proinsulin polypeptides are described that include a contacting a proinsulin polypeptide including an insulin polypeptide coupled to one or more peptides by peptide bond(s) capable of being cleaved to yield the insulin polypeptide with an oligomer under conditions sufficient to couple the oligomer to the insulin polypeptide portion of the proinsulin polypeptide and provide a proinsulin polypeptide-oligomer conjugate, and cleaving the one or more peptides from the proinsulin polypeptide-oligomer conjugate to provide the insulin polypeptide-oligomer conjugate. Methods of synthesizing proinsulin polypeptide-oligomer conjugates are also described as are proinsulin polypeptide-oligomer conjugates. Methods of synthesizing C-peptide polypeptide-oligomer conjugates are also described.
    Type: Application
    Filed: July 5, 2005
    Publication date: December 15, 2005
    Inventors: Balasingam Radhakrishnan, Richard Soltero, Nnochiri Ekwuribe
  • Patent number: 6930090
    Abstract: The present invention relates to amphiphilic drug-oligomer conjugates capable of traversing the blood-brain barrier (“BBB”) and to methods of making and using such conjugates. An amphiphilic drug-oligomer conjugate comprises a therapeutic compound conjugated to an oligomer, wherein the oligomer comprises a lipophilic moiety coupled to a hydrophilic moiety. The conjugates of the invention further comprise therapeutic agents such as proteins, peptides, nucleosides, nucleotides, antiviral agents, antineoplastic agents, antibiotics, etc., and prodrugs, precursors, derivatives and intermediates thereof, chemically coupled to amphiphilic oligomers.
    Type: Grant
    Filed: November 19, 2003
    Date of Patent: August 16, 2005
    Assignee: Nobex Corporation
    Inventors: Nnochiri N. Ekwuribe, Balasingam Radhakrishnan, Christopher H. Price, Wes Anderson, Jr., Aslam M. Ansari
  • Patent number: 6913903
    Abstract: Methods for synthesizing proinsulin polypeptides are described that include a contacting a proinsulin polypeptide including an insulin polypeptide coupled to one or more peptides by peptide bond(s) capable of being cleaved to yield the insulin polypeptide with an oligomer under conditions sufficient to couple the oligomer to the insulin polypeptide portion of the proinsulin polypeptide and provide a proinsulin polypeptide-oligomer conjugate, and cleaving the one or more peptides from the proinsulin polypeptide-oligomer conjugate to provide the insulin polypeptide-oligomer conjugate. Methods of synthesizing proinsulin polypeptide-oligomer conjugates are also described as are proinsulin polypeptide-oligomer conjugates. Methods of synthesizing C-peptide polypeptide-oligomer conjugates are also described.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: July 5, 2005
    Assignee: Nobex Corporation
    Inventors: Richard Soltero, Balasingam Radhakrishnan, Nnochiri N. Ekwuribe