Patents by Inventor Randall W. Yatscoff

Randall W. Yatscoff 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: 7521421
    Abstract: Cyclosporine derivatives are disclosed which possess enhanced efficacy and reduced toxicity over naturally occurring and other presently known cyclosporins and cyclosporine derivatives. The cyclosporine derivatives of the present invention are produced by chemical and isotopic substitution of the cyclosporine A (CsA) molecule by: (1) Chemical substitution and optionally deuterium substitution of amino acid 1; and (2) deuterium substitution at key sites of metabolism of the cyclosporine A molecule such as amino acids 1, 4, 9. Also disclosed are methods of producing the cyclosporine derivatives and method of producing immunosuppression with reduced toxicity with the disclosed cyclosporine derivatives.
    Type: Grant
    Filed: November 15, 2005
    Date of Patent: April 21, 2009
    Assignee: Isotechnika Inc.
    Inventors: Selvaraj Naicker, Randall W. Yatscoff, Robert T. Foster
  • Publication number: 20090054311
    Abstract: The present invention relates to formulations containing cyclosporin analogs that are structurally similar to cyclosporin A, in particular isomeric mixtures of cyclosporin analogs that are structurally similar to cyclosporin A. The formulations form stable microemulsion preconcentrates and may provide superior drug bioavailability and/or may reduce one or more adverse effects associated with the administration of cyclosporin. Also disclosed are methods for using and preparing the formulations.
    Type: Application
    Filed: August 22, 2008
    Publication date: February 26, 2009
    Applicant: ISOTECHNIKA INC.
    Inventors: Selvaraj A. Naicker, Randall W. Yatscoff, Robert T. Foster
  • Patent number: 7429562
    Abstract: The present invention relates to formulations containing cyclosporin analogs that are structurally similar to cyclosporin A, in particular isomeric mixtures of cyclosporin analogs that are structurally similar to cyclosporin A. The formulations form stable microemulsion preconcentrates and may provide superior drug bioavailability and/or may reduce one or more adverse effects associated with the administration of cyclosporin. Also disclosed are methods for using and preparing the formulations.
    Type: Grant
    Filed: March 13, 2006
    Date of Patent: September 30, 2008
    Assignee: Isotechnika Inc.
    Inventors: Selvaraj A. Naicker, Randall W. Yatscoff, Robert T. Foster
  • Publication number: 20080171850
    Abstract: The invention is directed to isomeric mixtures of cyclosporine analogues that are structurally similar to cyclosporine A. The mixtures possess enhanced efficacy and reduced toxicity over the individual isomers and over naturally occurring and other presently known cyclosporines and cyclosporine derivatives. Embodiments of the present invention are directed toward cis and trans-isomers of cyclosporin A analogs referred to as ISATX247, and derivatives thereof. Mixtures of ISATX247 isomers exhibit a combination of enhanced potency and reduced toxicity over the naturally occurring and presently known cyclosporins. ISATX247 isomers and alkylated, arylated, and deuterated derivatives are synthesized by stereoselective pathways where the particular conditions of a reaction determine the degree of stereoselectivity. The ratio of isomers in a mixture may range from about 10 to 90 percent by weight of the (E)-isomer to about 90 to 10 percent by weight of the (Z)-isomer, based on the total weight of the mixture.
    Type: Application
    Filed: January 3, 2008
    Publication date: July 17, 2008
    Applicant: ISOTECHNIKA INC.
    Inventors: Selvaraj Naicker, Randall W. Yatscoff, Robert T. Foster
  • Patent number: 7358229
    Abstract: Cyclosporine derivatives are disclosed which possess enhanced efficacy and reduced toxicity over naturally occurring and other presently known cyclosporins and cyclosporine derivatives. The cyclosporine derivatives of the present invention are produced by chemical and isotopic substitution of the cyclosporine A (CsA) molecule by: (1) Chemical substitution and optionally deuterium substitution of amino acid 1; and (2) deuterium substitution at key sites of metabolism of the cyclosporine A molecule such as amino acids 1, 4, 9. Also disclosed are methods of producing the cyclosporine derivatives and method of producing immunosuppression with reduced toxicity with the disclosed cyclosporine derivatives.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: April 15, 2008
    Assignee: Isotechnika Inc.
    Inventors: Selvaraj Naicker, Randall W. Yatscoff, Robert T. Foster
  • Patent number: 7332472
    Abstract: The invention is directed to isomeric mixtures of cyclosporine analogues that are structurally similar to cyclosporine A. The mixtures possess enhanced efficacy and reduced toxicity over the individual isomers and over naturally occurring and other presently known cyclosporines and cyclosporine derivatives. Embodiments of the present invention are directed toward cis and trans-isomers of cyclosporin A analogs referred to as ISATX247, and derivatives thereof. Mixtures of ISATX247 isomers exhibit a combination of enhanced potency and reduced toxicity over the naturally occurring and presently known cyclosporins. ISATX247 isomers and alkylated, arylated, and deuterated derivatives are synthesized by stereoselective pathways where the particular conditions of a reaction determine the degree of stereoselectivity. The ratio of isomers in a mixture may range from about 10 to 90 percent by weight of the (E)-isomer to about 90 to 10 percent by weight of the (Z)-isomer, based on the total weight of the mixture.
    Type: Grant
    Filed: April 28, 2005
    Date of Patent: February 19, 2008
    Assignee: Isotechnika Inc.
    Inventors: Selvaraj Naicker, Randall W. Yatscoff, Robert T. Foster
  • Patent number: 7160867
    Abstract: This invention provides modified rapamycins that have specific monosaccharide(s), oligosaccharide(s), pseudosugar(s) or derivatives thereof attached through a linker to create rapamycin carbohydrate derivatives having enhanced pharmacokinetic and/or pharmacodynamic profiles. For example, administration of the rapamycin carbohydrate derivative results in altered pharmacokinetic profiles and reduced toxicities. Thus, the present invention provides compounds with characteristics that are distinct from other drugs in its class such as rapamycin.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: January 9, 2007
    Assignee: Isotechnika, Inc.
    Inventors: Mark Abel, Roman Szweda, Daniel Trepanier, Randall W Yatscoff, Robert T. Foster
  • Patent number: 7141648
    Abstract: The invention is directed to isomeric mixtures of cyclosporine analogues that are structurally similar to cyclosporine A. The mixtures possess enhanced efficacy and reduced toxicity over the individual isomers and over naturally occurring and other presently known cyclosporines and cyclosporine derivatives. Embodiments of the present invention are directed toward cis and trans-isomers of cyclosporin A analogs referred to as ISATX247, and derivatives thereof. ISATX247 isomers and alkylated, arylated, and deuterated derivatives are synthesized by stereoselective pathways where the particular conditions of a reaction determine the degree of stereoselectivity. Stereoselective pathways may utilize a Wittig reaction, or an organometallic reagent comprising inorganic elements such as boron, silicon, titanium, and lithium. The ratio of isomers in a mixture may range from about 10 to 90 percent by weight of the (E)-isomer to about 90 to 10 percent by weight of the (Z)-isomer, based on the total weight of the mixture.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: November 28, 2006
    Assignee: Isotechnika Inc.
    Inventors: Selvaraj A. Naicker, Randall W. Yatscoff, Robert T. Foster, Mark Abel, Seetharaman Jayaraman, Hans-Jürgen Mair, Jean-Michel Adam, Bruno Lohri
  • Patent number: 7118919
    Abstract: Use of 13C glucose in an analytical assay to monitor glucose metabolism by measurement of labeled exhaled CO2 is provided. A breath test and kit for performing the breath test are described for the diagnosis of diabetic indications and monitoring of glycemic control. The breath test utilizes the measurement of expired 13C-labeled CO2 following the ingestion of a 13C-enriched glucose source.
    Type: Grant
    Filed: February 28, 2005
    Date of Patent: October 10, 2006
    Assignee: Isotechnika Inc.
    Inventors: Randall W. Yatscoff, Robert T. Foster, Launa J. Aspeslet, Richard Lewanczuk
  • Patent number: 7060672
    Abstract: The present invention relates to formulations containing cyclosporin analogs that are structurally similar to cyclosporin A, in particular isomeric mixtures of cyclosporin analogs that are structurally similar to cyclosporin A. The formulations form stable microemulsion preconcentrates and may provide superior drug bioavailability and/or may reduce one or more adverse effects associated with the administration of cyclosporin. Also disclosed are methods for using and preparing the formulations.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: June 13, 2006
    Assignee: Isotechnika, Inc.
    Inventors: Selvaraj A. Naicker, Randall W. Yatscoff, Robert T. Foster
  • Patent number: 6998385
    Abstract: The invention is directed to isomeric mixtures of cyclosporine analogues that are structurally similar to cyclosporine A. The mixtures possess enhanced efficacy and reduced toxicity over the individual isomers and over naturally occurring and other presently known cyclosporines and cyclosporine derivatives. Embodiments of the present invention are directed toward cis and trans-isomers of cyclosporin A analogs referred to as ISATX247, and derivatives thereof. Mixtures of ISATX247 isomers exhibit a combination of enhanced potency and reduced toxicity over the naturally occurring and presently known cyclosporins. ISATX247 isomers and alkylated, arylated, and deuterated derivatives are synthesized by stereoselective pathways where the particular conditions of a reaction determine the degree of stereoselectivity. The ratio of isomers in a mixture may range from about 10 to 90 percent by weight of the (E)-isomer to about 90 to 10 percent by weight of the (Z)-isomer, based on the total weight of the mixture.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: February 14, 2006
    Assignee: Isotechnika Inc.
    Inventors: Selvaraj A. Naicker, Randall W. Yatscoff, Robert T. Foster
  • Patent number: 6939878
    Abstract: The synthesis of deuterated analogues of rapamycin is disclosed together with a method for use for inducing immunosupression and in the treatment of transplantation rejection, graft vs host disease, autoimmune diseases, diseases of inflammation leukemia/lymphoma, solid tumors, fungal infections, hyperproliferative vascular disorders. Also described is a method for the synthesis of water soluble deuteratred rapamycin compounds and their use as described above.
    Type: Grant
    Filed: January 9, 2004
    Date of Patent: September 6, 2005
    Assignee: Isotechnika International Inc.
    Inventors: Selvaraj Naicker, Randall W. Yatscoff, Robert T. Foster
  • Patent number: 6884429
    Abstract: Deuterated rapamycin can be controllably introduced target locations within the patient's body by using an implantable medical device having a structure incorporated with a therapeutic agent comprising a deuterated rapamycin. Representative deuterated rapamycins include epi-7-deuteromthyl rapamycin, 7,43-d6 rapamycin, 7-deuteromethyl rapamycin and 31,42-d2-rapamycin and isomers thereof, and mixtures thereof. The deuterated rapamycin can also be glycosylated.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: April 26, 2005
    Assignee: Isotechnika International Inc.
    Inventors: Joseph Koziak, Selvaraj Naicker, Randall W. Yatscoff, Robert T. Foster
  • Patent number: 6878550
    Abstract: Use of 13C glucose in an analytical assay to monitor glucose metabolism by measurement of labeled exhaled CO2 is provided. A breath test and kit for performing the breath test are described for the diagnosis of diabetic indications and monitoring of glycemic control. The breath test utilizes the measurement of expired 13C-labeled CO2 following the ingestion of a 13C-enriched glucose source.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: April 12, 2005
    Assignee: Isotechnika Inc.
    Inventors: Randall W. Yatscoff, Robert T. Foster, Launa J. Aspeslet, Richard Lewanczuk
  • Publication number: 20040235762
    Abstract: This invention provides modified rapamycins that have specific monosaccharide(s), oligosaccharide(s), pseudosugar(s) or derivatives thereof attached through a linker to create rapamycin carbohydrate derivatives having enhanced pharmacokinetic and/or pharmacodynamic profiles. For example, administration of the rapamycin carbohydrate derivative results in altered pharmacokinetic profiles and reduced toxicities. Thus, the present invention provides compounds with characteristics that are distinct from other drugs in its class such as rapamycin.
    Type: Application
    Filed: May 13, 2004
    Publication date: November 25, 2004
    Inventors: Mark Abel, Roman Szweda, Daniel Trepanier, Randall W. Yatscoff, Robert T. Foster
  • Publication number: 20040198762
    Abstract: The synthesis of deuterated analogues of rapamycin is disclosed together with a method for use for inducing immunosupression and in the treatment of transplantation rejection, graft vs host disease, autoimmune diseases, diseases of inflammation leukemia/lymphoma, solid tumors, fungal infections, hyperproliferative vascular disorders. Also described is a method for the synthesis of water soluble deuteratred rapamycin compounds and their use as described above.
    Type: Application
    Filed: January 9, 2004
    Publication date: October 7, 2004
    Inventors: Selvaraj Naicker, Randall W. Yatscoff, Robert T. Foster
  • Publication number: 20040198952
    Abstract: This invention relates to the production of polyclonal and monoclonal antibodies to specific regions of cyclosporine (CSA) and/or CSA metabolites/derivatives. The reactivity of these polyclonal and monoclonal antibodies make them particularly useful for immunoassays for therapeutic drug monitoring (TDM). These immunoassays or TDM kits may include polyclonal or monoclonal antibodies to specific sites of CSA and/or CSA metabolites. These kits may also include various combinations of polyclonal antibodies, polyclonal and monoclonal antibodies or a panel of monoclonal antibodies. Cyclosporine or CSA metabolite conjugate immunogens are prepared for the immunization of a host animal to produce antibodies directed against specific regions of the CSA or CSA metabolite molecule.
    Type: Application
    Filed: January 13, 2004
    Publication date: October 7, 2004
    Inventors: Randall W. Yatscoff, Andrew J. Malcolm, S. Selvaraj Naicker
  • Publication number: 20040198953
    Abstract: This invention relates to the production of polyclonal and monoclonal antibodies to specific sites of rapamycin (Sirolimus). The reactivity of these poly and monoclonal antibodies make them particularly useful for immunoassays for therapeutic drug monitoring (TDM). These immunoassays or TDM kits may include polyclonal or monoclonal antibodies to specific sites of rapamycin. These kits may also include various combinations of polyclonal antibodies, polyclonal and monoclonal antibodies or a panel of monoclonal antibodies. Rapamycin conjugate immunogens are prepared for the immunization of a host animal to produce antibodies directed against specific regions of the rapamycin molecule. By determining the specific binding region of particular antibody, immunoassays which are capable of distinguishing between the parent molecule, active metabolites, inactive metabolites and other structurally similar immunosuppressant compounds are developed.
    Type: Application
    Filed: January 13, 2004
    Publication date: October 7, 2004
    Inventors: Randall W. Yatscoff, Andrew J. Malcolm, Selvaraj Naicker
  • Patent number: 6780995
    Abstract: A series of activated iodo-benzamide derivatives are described as antineoplastic and antiviral drug compounds. The compounds generally possess a chelating group, a thiol trapping group and an activating group. The presumptive mechanism of action in preventing cancer cell and virus replication is through inhibition of the binding of transcription factors to zinc finger binding domains. The compounds are effective in inhibiting growth of a variety of human and animal tumor and leukemia cell lines at low concentrations.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: August 24, 2004
    Assignee: Isotechnika Inc.
    Inventors: Randall W. Yatscoff, Robert T. Foster, Selvaraj Naicker
  • Patent number: 6713266
    Abstract: This invention relates to the production of polyclonal and monoclonal antibodies to specific regions of cyclosporine (CSA) and/or CSA metabolites/derivatives. The reactivity of these polyclonal and monoclonal antibodies make them particularly useful for immunoassays for therapeutic drug monitoring (TDM). These immunoassays or TDM kits may include polyclonal or monoclonal antibodies to specific sites of CSA and/or CSA metabolites. These kits may also include various combinations of polyclonal antibodies, polyclonal and monoclonal antibodies or a panel of monoclonal antibodies. Cyclosporine or CSA metabolite conjugate immunogens are prepared for the immunization of a host animal to produce antibodies directed against specific regions of the CSA or CSA metabolite molecule.
    Type: Grant
    Filed: August 30, 2000
    Date of Patent: March 30, 2004
    Assignee: Isodiagnostika Inc.
    Inventors: Randall W. Yatscoff, Andrew J. Malcolm, S. Selvaraj Naicker