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: 10472394
    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.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: November 12, 2019
    Assignee: AURINIA PHARMACEUTICALS INC.
    Inventors: Selvaraj A. Naicker, Randall W Yatscoff, Robert T Foster
  • Publication number: 20170362277
    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.
    Type: Application
    Filed: August 14, 2017
    Publication date: December 21, 2017
    Inventors: Selvaraj A. Naicker, Randall W. Yatscoff, Robert T. Foster
  • Patent number: 9765119
    Abstract: The invention is directed to isomeric mixtures of cyclosporine analogs 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 comprises greater than about 80 percent by weight of the E-isomer and less than about 20 percent by weight of the Z-isomer, based on the total weight of the mixture.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: September 19, 2017
    Assignee: Aurinia Pharmaceuticals Inc.
    Inventors: Selvaraj A. Naicker, Randall W Yatscoff, Robert T Foster
  • Publication number: 20160075741
    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 comprises greater than about 80 percent by weight of the E-isomer and less than about 20 percent by weight of the Z-isomer, based on the total weight of the mixture.
    Type: Application
    Filed: November 23, 2015
    Publication date: March 17, 2016
    Inventors: Selvaraj A. Naicker, Randall W. Yatscoff, Robert T. Foster
  • Publication number: 20140370082
    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 stereo selectivity. The ratio of isomers in a mixture comprises greater than about 80 percent by weight of the E-isomer and less than about 20 percent by weight of the Z-isomer, based on the total weight of the mixture.
    Type: Application
    Filed: July 4, 2014
    Publication date: December 18, 2014
    Inventors: Selvaraj A. Naicker, Randall W. Yatscoff, Robert T. Foster
  • Publication number: 20140288266
    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: Application
    Filed: March 18, 2014
    Publication date: September 25, 2014
    Applicant: Aurinia Pharmaceuticals, Inc.
    Inventors: Selvaraj A. Naicker, Randall W. Yatscoff, Robert T. Foster, Mark Abel, Seetharaman Jayaraman, Hans-Jürgen Mair, Jean-Michel Adam, Bruno Lohri
  • Publication number: 20140249092
    Abstract: The present disclosure 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: March 9, 2014
    Publication date: September 4, 2014
    Applicant: Aurinia Pharmaceuticals, Inc.
    Inventors: Selvaraj A. Naicker, Randall W. Yatscoff, Robert T. Foster
  • Publication number: 20140235819
    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 metabo-lism of the cyclosporine A molecule such as amino acids 1, 4, 9. Also disclosed are methods of producing the cyclosporine derivatives and methods of producing immunosuppression with reduced toxicity using the disclosed cyclosporine derivatives.
    Type: Application
    Filed: February 17, 2014
    Publication date: August 21, 2014
    Applicant: Aurinia Pharmaceuticals, Inc.
    Inventors: Selvaraj A. Naicker, Randall W. Yatscoff, Robert T. Foster
  • Publication number: 20140142277
    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: September 30, 2013
    Publication date: May 22, 2014
    Applicant: Aurinia Pharmaceuticals Inc.
    Inventors: Selvaraj A. Naicker, Randall W. Yatscoff, Robert T. Foster
  • Publication number: 20130078280
    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: November 26, 2012
    Publication date: March 28, 2013
    Inventors: Selvaraj A. Naicker, Randall W. Yatscoff, Robert T Foster
  • Publication number: 20120214745
    Abstract: Cyclosporine derivatives are disclosed which possess enhanced efficacy and reduced toxicity over naturally occurring and other presently known cyclosporin 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: Application
    Filed: February 22, 2012
    Publication date: August 23, 2012
    Applicant: Isotechnika Pharma Inc.
    Inventors: Salvaraj Naicker, Randall W. Yatscoff, Robert T. Foster
  • Publication number: 20110166080
    Abstract: Cyclosporine derivatives are disclosed which possess enhanced efficacy and reduced toxicity over naturally occurring and other presently known cyclosporin 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: Application
    Filed: March 15, 2011
    Publication date: July 7, 2011
    Applicant: Isotechnika, Inc.
    Inventors: Salvaraj Naicker, Randall W. Yatscoff, Robert T. Foster
  • Publication number: 20110136744
    Abstract: The present disclosure 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: November 8, 2010
    Publication date: June 9, 2011
    Applicant: Isotechnika Inc.
    Inventors: Selvaraj A. Naicker, Randall W. Yatscoff, Robert T. Foster
  • Publication number: 20110092669
    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: Application
    Filed: December 23, 2010
    Publication date: April 21, 2011
    Applicant: ISOTECHNIKA INC.
    Inventors: Selvaraj A. Naicker, Randall W. Yatscoff, Robert T. Foster, Mark Abel, Seetharaman Jayaraman, Hans-Jurgen Mair, Jean-Michel Adam, Bruno Lohri
  • Publication number: 20100311944
    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: June 8, 2010
    Publication date: December 9, 2010
    Inventors: Selvaraj Naicker, Randall W. Yatscoff, Robert T. Foster
  • Patent number: 7829533
    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: August 22, 2008
    Date of Patent: November 9, 2010
    Assignee: Isotechnika Inc.
    Inventors: Selvaraj A. Naicker, Randall W. Yatscoff, Robert T. Foster
  • Publication number: 20100062976
    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: Application
    Filed: September 8, 2009
    Publication date: March 11, 2010
    Applicant: ISOTECHNIKA INC.
    Inventors: Selvaraj A. Naicker, Randall W. Yatscoff, Robert T. Foster, Mark Abel, Seetharaman Jayaraman, Hans-Jurgen Mair, Jean-Michel Adam, Bruno Lohri
  • Publication number: 20090318336
    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: Application
    Filed: April 21, 2009
    Publication date: December 24, 2009
    Applicant: ISOTECHNIKA INC.
    Inventors: Selvaraj Naicker, Randall W. Yatscoff, Robert T. Foster
  • Patent number: 7538189
    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: October 6, 2005
    Date of Patent: May 26, 2009
    Assignee: Isotechnika Inc.
    Inventors: Selvaraj Naicker, Randall W. Yatscoff, Robert T. Foster
  • Patent number: RE48226
    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: June 30, 2014
    Date of Patent: September 29, 2020
    Assignee: Aurinia Pharmaceuticals Inc.
    Inventors: Selvaraj A. Naicker, Randall W Yatscoff, Robert T Foster