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).

  • Publication number: 20050080001
    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: September 30, 2004
    Publication date: April 14, 2005
    Inventors: Richard Soltero, Balasingam Radhakrishnan, Nnochiri Ekwuribe
  • Patent number: 6828297
    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: June 4, 2001
    Date of Patent: December 7, 2004
    Assignee: Nobex Corporation
    Inventors: Nnochiri N. Ekwuribe, Christopher H. Price, Aslam M. Ansari, Balasingam Radhakrishnan, Amy L. Odenbaugh
  • Publication number: 20040198949
    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: April 29, 2004
    Publication date: October 7, 2004
    Inventors: Nnochiri N. Ekwuribe, Christopher H. Price, Aslam M. Ansari, Balasingam Radhakrishnan, Amy L. Odenbaugh
  • Publication number: 20040110735
    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: Application
    Filed: November 19, 2003
    Publication date: June 10, 2004
    Inventors: Nnochiri N. Ekwuribe, Balasingam Radhakrishnan, Christopher H. Price, Wesley R. Anderson, Aslam M. Ansari
  • Publication number: 20040102381
    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: Application
    Filed: November 19, 2003
    Publication date: May 27, 2004
    Inventors: Nnochiri N. Ekwuribe, Balasingam Radhakrishnan, Christopher H. Price, Wesley R. Anderson, Aslam M. Ansari
  • Publication number: 20040091452
    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: Application
    Filed: November 8, 2002
    Publication date: May 13, 2004
    Inventors: Nnochiri N. Ekwuribe, Balasingam Radhakrishnan
  • Publication number: 20040038866
    Abstract: Pharmaceutical compositions that include insulin, an insulin drug-oligomer conjugate, a fatty acid component, and a bile salt component or a bile salt component without a fatty acid component are described. The insulin drug is covalently coupled to an oligomeric moiety. The fatty acid component and the bile salt component, when together, can be present in a weight-to-weight ratio of between 1:15 and 15:1. Methods of treating an insulin deficiency in a subject in need of such treatment using such pharmaceutical compositions are also provided, as are methods of providing such pharmaceutical compositions.
    Type: Application
    Filed: March 5, 2003
    Publication date: February 26, 2004
    Inventors: Richard Soltero, Balasingam Radhakrishnan, Nnochiri N. Ekwuribe, Bruce Rehlaender, Anthony Hickey, Li Li Bovet
  • Publication number: 20030228652
    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: Application
    Filed: March 17, 2003
    Publication date: December 11, 2003
    Inventors: Balasingam Radhakrishnan, Richard Soltero, Nnochiri N. Ekwuribe, Monica Puskas, Diti Sangal
  • Publication number: 20030229009
    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: Application
    Filed: March 5, 2003
    Publication date: December 11, 2003
    Inventors: Richard Soltero, Balasingam Radhakrishnan, Nnochiri N. Ekwuribe
  • Publication number: 20030087808
    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: December 21, 2001
    Publication date: May 8, 2003
    Inventors: Richard Soltero, Balasingam Radhakrishnan, Nnochiri N. Ekwuribe
  • Publication number: 20030027748
    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: June 4, 2001
    Publication date: February 6, 2003
    Inventors: Nnochiri N. Ekwuribe, Chirstopher H. Price, Aslam M. Ansari, Balasingam Radhakrishnan, Amy L. Odenbaugh
  • Patent number: 6191105
    Abstract: A therapeutic formulation comprising a microemulsion of a therapeutic agent in free and/or conjugatively coupled form, wherein the microemulsion comprises a water-in-oil (w/o) microemulsion including a lipophilic phase and a hydrophilic phase, and has a hydrophilic and lipophilic balance (HLB) value between 3 and 7, wherein the therapeutic agent may for example be selected from the group consisting of insulin, calcitonin, ACTH, glucagon, somatostatin, somatotropin, somatomedin, parathyroid hormone, erythropoietin, hypothalamic releasing factors, prolactin, thyroid stimulating hormones, endorphins, enkephalins, vasopressin, non-naturally occurring opioids, superoxide dismutase, interferon, asparaginase, arginase, arginine deaminease, adenosine deaminase, ribonuclease, trypsin, chymotrypsin, papain, Ara-A (Arabinofuranosyladenine), Acylguanosine, Nordeoxyguanosine, Azidothymidine, Dideoxyadenosine, Dideoxycytidine, Dideoxyinosine Floxuridine, 6-Mercaptopurine, Doxorubicin, Daunorubicin, or I-darubicin, Erythrom
    Type: Grant
    Filed: October 27, 1997
    Date of Patent: February 20, 2001
    Assignee: Protein Delivery, Inc.
    Inventors: Nnochiri Nkem Ekwuribe, Muthukumar Ramaswamy, Balasingam Radhakrishnan, HameedSulthan S. Allaudeen