Patents Assigned to CellGate, Inc.
  • Patent number: 7585834
    Abstract: The present invention provides compositions and methods for enhancing transport of biologically active compounds across biological membranes and across and into animal epithelial or endothelial tissues. The composition includes a biologically active agent and a transport moiety. The transport moiety includes a structure selected from the group consisting of (ZYZ)nZ, (ZY)nZ, (ZYY)nZ and (ZYYY)nZ. Subunit “Z” is L-arginine or D-arginine, and subunit “Y” is an amino acid that does not comprise an amidino or guanidino moiety. Subscript “n” is an integer ranging from 2 to 10. The method for enhancing transport involves the administration of the aforementioned composition.
    Type: Grant
    Filed: February 14, 2002
    Date of Patent: September 8, 2009
    Assignees: The Board of Trustees of the Leland Stanford Junior University, Cellgate, Inc.
    Inventors: Paul A. Wender, Jonathan B. Rothbard, Lee Wright, Erik L. Kreider, Christopher L. VanDeusen
  • Patent number: 7312244
    Abstract: Conjugates in which polyamine analogs are conjugated to an amino acid are provided, as well as compositions comprising these conjugates. Methods of using these conjugates as anticancer treatments are also provided.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: December 25, 2007
    Assignee: Cellgate, Inc.
    Inventors: Linda Clifford, legal representative, Laurence J. Marton, Aldonia L. Valasinas, Venodhar K. Reddy, Benjamin Frydman, deceased
  • Patent number: 7279502
    Abstract: Peptide conjugates in which cytocidal and cytostatic agents, such as polyamine analogs or naphthoquinones, are conjugated to a polypeptide recognized and cleaved by enzymes such as prostate-specific antigen (PSA) and cathepsin B are provided, as well as compositions comprising these conjugates. Methods of using these conjugates in the treatment of prostate diseases are also provided.
    Type: Grant
    Filed: October 20, 2004
    Date of Patent: October 9, 2007
    Assignee: Cellgate, Inc.
    Inventors: Linda Clifford, legal representative, Laurence J. Marton, Benjamin Frydman, deceased
  • Patent number: 7253207
    Abstract: Novel quinones are provided, as well as compositions comprising these novel quinones. Methods of using the novel quinones in treatment of various indications including cancer are also provided.
    Type: Grant
    Filed: August 2, 2004
    Date of Patent: August 7, 2007
    Assignee: Cellgate, Inc.
    Inventors: Andrei V. Blokhin, Benjamin Frydman, Laurence J. Marton, Karen M. Neder, Jerry Shunneng Sun
  • Publication number: 20070173436
    Abstract: This invention provides compositions and methods for enhancing delivery of drugs and other agents across epithelial tissues, including the skin, gastrointestinal tract, pulmonary epithelium, ocular tissues and the like. The compositions and methods are also useful for delivery across endothelial tissues, including the blood brain barrier. The compositions and methods employ a delivery enhancing transporter that has sufficient guanidino or amidino sidechain moieties to enhance delivery of a compound conjugated to the reagent across one or more layers of the tissue, compared to the non-conjugated compound. The delivery-enhancing polymers include, for example, poly-arginine molecules that are preferably between about 6 and 25 residues in length.
    Type: Application
    Filed: October 2, 2006
    Publication date: July 26, 2007
    Applicant: Cellgate, Inc.
    Inventors: Jonathan Rothbard, Paul Wender, P. McGrane, Lalitha Sista, Thorsten Kirschberg
  • Publication number: 20070161692
    Abstract: Novel conformationally restricted polyamine analogs are provided, as well as compositions comprising these novel polyamine analogs. Methods of using the novel polyamine analogs in treatment of diseases such as cancer are also provided. Also provided is a method of delivering these analogs specifically to tumor cells by covalently attaching polyamine analogs to porphyrin compounds, along with novel polyamine-porphyrin covalent conjugates.
    Type: Application
    Filed: December 20, 2006
    Publication date: July 12, 2007
    Applicant: Cellgate, Inc.
    Inventors: Benjamin Frydman, Linda Clifford, Laurence Marton, Venodhar Reddy, Aldonia Valasinas, Andrei Blokhin, Hirak Basu
  • Patent number: 7229961
    Abstract: This invention provides compositions and methods for enhancing delivery of drugs and other agents across epithelial tissues, including into and across ocular tissues and the like. The compositions and methods are also useful for delivery across endothelial tissues, including the blood brain barrier. The compositions and methods employ a delivery enhancing transporter that has sufficient guanidino or amidino sidechain moieties to enhance delivery of a compound conjugated to the reagent across one or more layers of the tissue, compared to the non-conjugated compound. The delivery-enhancing polymers include, for example, poly-arginine molecules that are preferably between about 6 and 25 residues in length (SEQ ID NO:86).
    Type: Grant
    Filed: February 25, 2002
    Date of Patent: June 12, 2007
    Assignee: Cellgate, Inc.
    Inventors: Jonathan B. Rothbard, Paul A. Wender, P. Leo McGrane, Lalitha V. S. Sista, Thorsten A. Kirschberg
  • Patent number: 7186825
    Abstract: Novel conformationally restricted polyamine analogs are provided, as well as compositions comprising these novel polyamine analogs. Methods of using the novel polyamine analogs in treatment of diseases such as cancer are also provided. Also provided is a method of delivering these analogs specifically to tumor cells by covalently attaching polyamine analogs to porphyrin compounds, along with novel polyamine-porphyrin covalent conjugates.
    Type: Grant
    Filed: June 21, 2004
    Date of Patent: March 6, 2007
    Assignee: Cellgate, Inc.
    Inventors: Benjamin Frydman, Laurence J. Marton, Venodhar K. Reddy, Aldonia L. Valasinas, Andrei V. Blokhin, Hirak S. Basu
  • Patent number: 7169814
    Abstract: Transport reagents and conjugates of therapeutic agents linked to transport reagents are described. In particular, the transport reagents have a plurality of guanidinium moieties that are either contiguous or spaced along a backbone, but are sufficiently removed from the backbone via tethers, to allow their interaction with a cell or tissue surface, leading to uptake of the therapeutic agent.
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: January 30, 2007
    Assignees: The Board of Trustees of the Leland Stanford Junior University, Cellgate, Inc.
    Inventors: Jonathan B. Rothbard, Paul A. Wender, Kanaka Pattabiraman, Erin T. Pelkey, Theodore C. Jessop
  • Patent number: 7026347
    Abstract: Porphyrin-polyamine conjugate compounds are disclosed which have anticancer and antitumor effects. The porphyrin moiety selectively localizes in tumors, while the polyamine moiety serves as a cytotoxic agent. Methods of making and using the porphyrin-polyamine conjugate compounds are also disclosed.
    Type: Grant
    Filed: June 24, 2003
    Date of Patent: April 11, 2006
    Assignee: CellGate, Inc.
    Inventors: Benjamin Frydman, Aldonia L. Valasinas, Venodhar K. Reddy, Hirak S. Basu, Aparajita Sarkar, Subhra Bhattacharya, Yu Wang, Laurence J. Marton, Andrei V. Blokhin
  • Publication number: 20060030735
    Abstract: Conformationally restricted polyamine compounds useful in treatment of cancer and other diseases marked by abnormal cell proliferation are disclosed. Improved methods of synthesizing such compounds are also disclosed. In one method of the invention, a carbene-bearing or carbene equivalent-bearing compound is reacted with the double bond of an alkene compound to form a cyclopropyl ring as the first step in the synthesis.
    Type: Application
    Filed: August 16, 2005
    Publication date: February 9, 2006
    Applicant: CellGate, Inc.
    Inventors: Benjamin Frydman, Linda Clifford, Aldonia Valasinas, Andrei Blokhin, Aparajita Sarkar, Hirak Basu, Venodhar Reddy, Laurence Marton, Yu Wang
  • Patent number: 6982351
    Abstract: Conformationally restricted polyamine compounds useful in treatment of cancer and other diseases marked by abnormal cell proliferation are disclosed. Improved methods of synthesizing such compounds are also disclosed. In one method of the invention, a carbene-bearing or carbene equivalent-bearing compound is reacted with the double bond of an alkene compound to form a cyclopropyl ring as the first step in the synthesis.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: January 3, 2006
    Assignee: CellGate, Inc.
    Inventors: Benjamin Frydman, Aldonia L. Valasinas, Andrei V. Blokhin, Aparajita Sarkar, Hirak S. Basu, Venodhar K. Reddy, Laurence J. Marton, Yu Wang
  • Publication number: 20040186045
    Abstract: This invention provides compositions and methods for enhancing delivery of drugs and other agents across epithelial tissues, including the skin, gastrointestinal tract, pulmonary epithelium, ocular tissues and the like. The compositions and methods are also useful for delivery across endothelial tissues, including the blood brain barrier. The compositions and methods employ a delivery enhancing transporter that has sufficient guanidino or amidino sidechain moieties to enhance delivery of a compound conjugated to the reagent across one or more layers of the tissue, compared to the non-conjugated compound. The delivery-enhancing polymers include, for example, poly-arginine molecules that are preferably between about 6 and 25 residues in length.
    Type: Application
    Filed: December 17, 2003
    Publication date: September 23, 2004
    Applicant: CellGate, Inc., a Delaware corporation
    Inventors: Jonathan B. Rothbard, Paul A. Wender, P. Leo McGrane, Lalitha V.S. Sista, Thorsten A. Kirschberg
  • Patent number: 6759387
    Abstract: This invention provides compositions and methods for enhancing delivery of drugs and other agents across epithelial tissues, including the skin, gastrointestinal tract, pulmonary epithelium, and the like. The compositions and methods are also useful for delivery across endothelial tissues, including the blood brain barrier. The compositions and methods employ a delivery enhancing transporter that has sufficient guanidino or amidino sidechain moieties to enhance delivery of a compound conjugated to the reagent across one or more layers of the tissue, compared to the non-conjugated compound. The delivery-enhancing polymers include, for example, poly-arginine molecules that are preferably between about 6 and 25 residues in length (SEQ ID NO:50).
    Type: Grant
    Filed: July 30, 2002
    Date of Patent: July 6, 2004
    Assignee: Cellgate, Inc.
    Inventors: Jonathan B. Rothbard, Paul A. Wender, P. Leo McGrane, Lalitha V. S. Sista, Thorsten A. Kirschberg
  • Patent number: 6730293
    Abstract: This invention provides compositions and methods for enhancing delivery of glucocorticoids and ascomycins such as hydrocortisone, cyclosporin and FK506 across into and across one or more layers of the skin for the treatment of psoriasis and other inflammatory diseases of the skin.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: May 4, 2004
    Assignee: CellGate, Inc.
    Inventors: Jonathan B. Rothbard, Paul A. Wender, P. Leo McGrane, Lalitha V. S. Sista, Thorsten A. Kirschberg
  • Patent number: 6669951
    Abstract: This invention provides compositions and methods for enhancing delivery of drugs and other agents across epithelial tissues, including the skin, gastrointestinal tract, pulmonary epithelium, ocular tissues and the like. The compositions and methods are also useful for delivery across endothelial tissues, including the blood brain barrier. The compositions and methods employ a delivery enhancing transporter that has sufficient guanidino or amidino sidechain moieties to enhance delivery of a compound conjugated to the reagent across one or more layers of the tissue, compared to the non-conjugated compound. The delivery-enhancing polymers include, for example, poly-arginine molecules that are preferably between about 6 and 25 residues in length.
    Type: Grant
    Filed: February 23, 2001
    Date of Patent: December 30, 2003
    Assignee: CellGate, Inc.
    Inventors: Jonathan B. Rothbard, Paul A. Wender, P. Leo McGrane, Lalitha V. S. Sista, Thorsten A. Kirschberg
  • Patent number: 6593292
    Abstract: This invention provides compositions and methods for enhancing delivery of drugs and other agents across epithelial tissues, including the skin, gastrointestinal tract, pulmonary epithelium, and the like. The compositions and methods are also useful for delivery across endothelial tissues, including the blood brain barrier. The compositions and methods employ a delivery enhancing transporter that has sufficient guanidino or amidino sidechain moieties to enhance delivery of a compound conjugated to the reagent across one or more layers of the tissue, compared to the non-conjugated compound. The delivery-enhancing polymers include, for example, poly-arginine molecules that are preferably between about 6 and 25 residues in length.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: July 15, 2003
    Assignee: CellGate, Inc.
    Inventors: Jonathan B. Rothbard, Paul A. Wender, P. Leo McGrane, Lalitha V. S. Sista, Thorsten A. Kirschberg
  • Publication number: 20030083256
    Abstract: This invention provides compositions and methods for enhancing delivery of drugs and other agents across epithelial tissues, including the skin, gastrointestinal tract, pulmonary epithelium, and the like. The compositions and methods are also useful for delivery across endothelial tissues, including the blood brain barrier. The compositions and methods employ a delivery enhancing transporter that has sufficient guanidino or amidino sidechain moieties to enhance delivery of a compound conjugated to the reagent across one or more layers of the tissue, compared to the non-conjugated compound. The delivery-enhancing polymers include, for example, poly-arginine molecules that are preferably between about 6 and 25 residues in length.
    Type: Application
    Filed: July 30, 2002
    Publication date: May 1, 2003
    Applicant: CellGate, Inc.
    Inventors: Jonathan B. Rothbard, Paul A. Wender, P. Leo McGrane, Lalitha V.S. Sista, Thorsten A. Kirschberg
  • Publication number: 20030032593
    Abstract: The present invention provides compositions and methods for enhancing transport of biologically active compounds across biological membranes and across and into animal epithelial or endothelial tissues. The composition includes a biologically active agent and a transport moiety. The transport moiety includes a structure selected from the group consisting of (ZYZ)nZ, (ZY)nZ, (ZYY)nZ and (ZYYY)nZ. Subunit “Z” is L-arginine or D-arginine, and subunit “Y” is an amino acid that does not comprise an amidino or guanidino moiety. Subscript “n” is an integer ranging from 2 to 10. The method for enhancing transport involves the administration of the aforementioned composition.
    Type: Application
    Filed: February 14, 2002
    Publication date: February 13, 2003
    Applicant: CellGate, Inc.
    Inventors: Paul A. Wender, Jonathan B. Rothbard, Lee Wright, Erik L. Kreider, Christopher J. VanDeusen
  • Publication number: 20030022831
    Abstract: This invention provides compositions and methods for enhancing delivery of drugs and other agents across epithelial tissues, including into and across ocular tissues and the like. The compositions and methods are also useful for delivery across endothelial tissues, including the blood brain barrier. The compositions and methods employ a delivery enhancing transporter that has sufficient guanidino or amidino sidechain moieties to enhance delivery of a compound conjugated to the reagent across one or more layers of the tissue, compared to the non-conjugated compound. The delivery-enhancing polymers include, for example, poly-arginine molecules that are preferably between about 6 and 25 residues in length.
    Type: Application
    Filed: February 25, 2002
    Publication date: January 30, 2003
    Applicant: CellGate, Inc., a Delaware corporation
    Inventors: Jonathan B. Rothbard, Paul A. Wender, P. Leo McGrane, Lalitha V.S. Sista, Thorsten A. Kirschberg