Patents by Inventor William M. Switzer

William M. Switzer 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: 9435000
    Abstract: Disclosed are compositions and methods related to the isolation and identification of the primate T-lymphotropic viruses, HTLV-3 and HTLV-4. The diversity of HTLVs was investigated among central Africans reporting contact with NHP blood and body fluids through hunting, butchering, and keeping primate pets. Herein it is shown that this population is infected with a variety of HTLVs, including two retroviruses; HTLV-4 is the first member of a novel phylogenetic lineage that is distinct from all known HTLVs and STLVs; HTLV-3 falls within the genetic diversity of STLV-3, a group that has not previously been seen in humans. The present disclosure also relates to vectors and vaccines for use in humans against infection and disease. The disclosure further relates to a variety of bioassays and kits for the detection and diagnosis of infection with and diseases caused by HTLV-3 and HTLV-4 and related viruses.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: September 6, 2016
    Assignees: The United States of America as represented by the Secretary of the Department of Health and Human Services, Centers for Disease Control and Prevention, Johns Hopkins University
    Inventors: William M. Switzer, Walid Heneine, Thomas M. Folks, Nathan D. Wolfe, Donald S. Burke, Eitel Mpoudi Ngole
  • Publication number: 20140186383
    Abstract: Disclosed are the simian T-cell lymphotropic virus type 3 subtype D (STLV-3 subtype D), isolated nucleic acid molecules encoding STLV-3 subtype D polypeptides, such as STLV-3 subtype D envelope, protease, polymerase, tax, rex, and capsid polypeptides, isolated polypeptides encoded by such nucleic acids. Methods are also disclosed for detecting STLV-3 subtype D, for example by detecting a STLV-3 subtype D nucleic acid or polypeptide in the sample. Accordingly, probes, primers, and antibodies for use in detecting STLV-3 subtype D nucleic acids or polypeptides are disclosed. Therapeutic compositions which include isolated nucleic acid molecules encoding a STLV-3 subtype D polypeptides or isolated polypeptides encoded by such nucleic acid molecules are also disclosed.
    Type: Application
    Filed: August 29, 2013
    Publication date: July 3, 2014
    Applicants: Johns Hopkins University, The Government of the U.S.A as Represented by the Secretary of the Department of He
    Inventors: William M. Switzer, Walid Heneine, Thomas M. Folks, Nathan D. Wolfe, Donald S. Burke, David M. Sintasath
  • Publication number: 20140080121
    Abstract: Disclosed are compositions and methods related to the isolation and identification of the primate T-lymphotropic viruses, HTLV-3 and HTLV-4. The diversity of HTLVs was investigated among central Africans reporting contact with NHP blood and body fluids through hunting, butchering, and keeping primate pets. Herein it is shown that this population is infected with a variety of HTLVs, including two retroviruses; HTLV-4 is the first member of a novel phylogenetic lineage that is distinct from all known HTLVs and STLVs; HTLV-3 falls within the genetic diversity of STLV-3, a group that has not previously been seen in humans. The present disclosure also relates to vectors and vaccines for use in humans against infection and disease. The disclosure further relates to a variety of bioassays and kits for the detection and diagnosis of infection with and diseases caused by HTLV-3 and HTLV-4 and related viruses.
    Type: Application
    Filed: September 20, 2013
    Publication date: March 20, 2014
    Applicants: Johns Hopkins University, The Government of the United States of America as represented by the Secretary of the Department of
    Inventors: William M. Switzer, Walid Heneine, Thomas M. Folks, Nathan D. Wolfe, Donald S. Burke, Eitel Mpoudi Ngole
  • Patent number: 8663968
    Abstract: Disclosed are the simian T-cell lymphotropic virus type 3 subtype D (STLV-3 subtype D), isolated nucleic acid molecules encoding STLV-3 subtype D polypeptides, such as STLV-3 subtype D envelope, protease, polymerase, tax, rex, and capsid polypeptides, isolated polypeptides encoded by such nucleic acids. Methods are also disclosed for detecting STLV-3 subtype D, for example by detecting a STLV-3 subtype D nucleic acid or polypeptide in the sample. Accordingly, probes, primers, and antibodies for use in detecting STLV-3 subtype D nucleic acids or polypeptides are disclosed. Therapeutic compositions which included isolated nucleic acid molecules encoding a STLV-3 subtype D polypeptides or isolated polypeptides encoded by such nucleic acid molecules are also disclosed.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: March 4, 2014
    Assignees: The United States of America as Represented by the Secretary of the Department of Health and Human Services, Centers for Disease Control and Prevention, Johns Hopkins University
    Inventors: William M. Switzer, Walid Heneine, Thomas M. Folks, Nathan D. Wolfe, Donald S. Burke, David M. Sintasath
  • Patent number: 8541221
    Abstract: Disclosed are compositions and methods related to the isolation and identification of the primate T-lymphotropic viruses, HTLV-3 and HTLV-4. The diversity of HTLVs was investigated among central Africans reporting contact with NHP blood and body fluids through hunting, butchering, and keeping primate pets. Herein it is shown that this population is infected with a variety of HTLVs, including two retroviruses; HTLV-4 is the first member of a novel phylogenetic lineage that is distinct from all known HTLVs and STLVs; HTLV-3 falls within the genetic diversity of STLV-3, a group that has not previously been seen in humans. The present disclosure also relates to vectors and vaccines for use in humans against infection and disease. The disclosure further relates to a variety of bioassays and kits for the detection and diagnosis of infection with and diseases caused by HTLV-3 and HTLV-4 and related viruses.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: September 24, 2013
    Assignees: The United States of America as represented by the Secretary of the Department of Health and Human Services, Centers for Disease Control and Prevention, Johns Hopkins University
    Inventors: William M. Switzer, Walid Heneine, Thomas M. Folks, Nathan D. Wolfe, Donald S. Burke, Eitel Mpoudi Ngole
  • Patent number: 8524461
    Abstract: A method for detecting at least one antibody directed against at least one primate immunodeficiency virus in a biological sample that includes contacting a biological sample with (i) at least one detection multiple antigenic peptide comprising a portion of an immunodominant region of a transmembrane protein of a primate immunodeficiency virus and (ii) at least one differentiation multiple antigenic peptide comprising a portion of a V3-loop of an envelope protein of a primate immunodeficiency virus. Also disclosed is an enzyme immunoassay that includes a first substrate to which are bound at least one of the detection multiple antigenic peptides and a second substrate to which are bound at least one of the differentiation multiple antigenic peptides.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: September 3, 2013
    Assignee: The United States of America, as represented by the Secretary, Department of Health and Human Services
    Inventors: Marcia L. Kalish, Clement B. Ndongmo, Chou-Pong Pau, William M. Switzer, Thomas M. Folks
  • Publication number: 20100317034
    Abstract: Disclosed are compositions and methods related to the isolation and identification of the primate T-lymphotropic viruses, HTLV-3 and HTLV-4. The diversity of HTLVs was investigated among central Africans reporting contact with NHP blood and body fluids through hunting, butchering, and keeping primate pets. Herein it is shown that this population is infected with a variety of HTLVs, including two retroviruses; HTLV-4 is the first member of a novel phylogenetic lineage that is distinct from all known HTLVs and STLVs; HTLV-3 falls within the genetic diversity of STLV-3, a group that has not previously been seen in humans. The present disclosure also relates to vectors and vaccines for use in humans against infection and disease. The disclosure further relates to a variety of bioassays and kits for the detection and diagnosis of infection with and diseases caused by HTLV-3 and HTLV-4 and related viruses.
    Type: Application
    Filed: July 1, 2010
    Publication date: December 16, 2010
    Inventors: William M. Switzer, Walid Heneine, Thomas M. Folks, Nathan D. Wolfe, Donald S. Burke, Eitel Mpoudi Ngole
  • Patent number: 7794998
    Abstract: Disclosed are compositions and methods related to the isolation and identification of the primate T-lymphotropic viruses, HTLV-3 and HTLV-4. The diversity of HTLVs was investigated among central Africans reporting contact with NHP blood and body fluids through hunting, butchering, and keeping primate pets. Herein it is shown that this population is infected with a variety of HTLVs, including two retroviruses; HTLV-4 is the first member of a novel phylogenetic lineage that is distinct from all known HTLVs and STLVs; HTLV-3 falls within the genetic diversity of STLV-3, a group that has not previously been seen in humans. The present disclosure also relates to vectors and vaccines for use in humans against infection and disease. The disclosure further relates to a variety of bioassays and kits for the detection and diagnosis of infection with and diseases caused by HTLV-3 and HTLV-4 and related viruses.
    Type: Grant
    Filed: February 24, 2007
    Date of Patent: September 14, 2010
    Assignees: Johns Hopkins University, The United States of America as represented by the Department of Health and Human Services
    Inventors: William M. Switzer, Walid Heneine, Thomas M. Folks, Nathan D. Wolfe, Donald S. Burke, Eitel Mpoudi Ngole
  • Publication number: 20100222236
    Abstract: A method for detecting at least one antibody directed against at least one primate immunodeficiency virus in a biological sample that includes contacting a biological sample with (i) at least one detection multiple antigenic peptide comprising a portion of an immunodominant region of a transmembrane protein of a primate immunodeficiency virus and (ii) at least one differentiation multiple antigenic peptide comprising a portion of a V3-loop of an envelope protein of a primate immunodeficiency virus. Also disclosed is an enzyme immunoassay that includes a first substrate to which are bound at least one of the detection multiple antigenic peptides and a second substrate to which are bound at least one of the differentiation multiple antigenic peptides.
    Type: Application
    Filed: March 4, 2010
    Publication date: September 2, 2010
    Inventors: Marcia L. Kalish, Clement B. Ndongmo, Chou-Pong Pau, William M. Switzer, Thomas M. Folks
  • Publication number: 20100160420
    Abstract: Disclosed are the simian T-cell lymphotropic virus type 3 subtype D (STLV-3 subtype D), isolated nucleic acid molecules encoding STLV-3 subtype D polypeptides, such as STLV-3 subtype D envelope, protease, polymerase, tax, rex, and capsid polypeptides, isolated polypeptides encoded by such nucleic acids. Methods are also disclosed for detecting STLV-3 subtype D, for example by detecting a STLV-3 subtype D nucleic acid or polypeptide in the sample. Accordingly, probes, primers, and antibodies for use in detecting STLV-3 subtype D nucleic acids or polypeptides are disclosed. Therapeutic compositions which included isolated nucleic acid molecules encoding a STLV-3 subtype D polypeptides or isolated polypeptides encoded by such nucleic acid molecules are also disclosed.
    Type: Application
    Filed: May 20, 2008
    Publication date: June 24, 2010
    Inventors: William M. Switzer, Walid Heneine, Thomas M. Folks, Nathan D. Wolfe, Donald S. Burke, David M. Sintasath
  • Patent number: 7691572
    Abstract: Assays and kits for the detection of phenotypic resistance of a retrovirus to reverse transcriptase inhibitor-drugs in a biological sample. The assays are based on the direct analysis of the susceptibility of retroviral reverse transcriptase to inhibition by a reverse transcriptase inhibitor drug. The enzymatic activity of the reverse transcriptase is determined by measuring the DNA product produced when an RNA template and a first complementary DNA primer from a suitable region of the encephalomyocarditis virus genome are incubated with a biological sample containing reverse transcriptase in the presence of the drug to which resistance is being determined. The DNA product is amplified and detection of the amplified DNA indicates resistance to the drug employed in the assay. Detection of relatively greater amounts of amplified DNA when certain drugs are used indicates the presence of multiple nucleoside analog resistant strains or mutations.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: April 6, 2010
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: Walid M. Heneine, Gerardo Garcia-Lerma, Shinji Yamamoto, William M. Switzer, Thomas M. Folks
  • Publication number: 20080292657
    Abstract: Disclosed are compositions and methods related to the isolation and identification of the primate T-lymphotropic viruses, HTLV-3 and HTLV-4. The diversity of HTLVs was investigated among central Africans reporting contact with NHP blood and body fluids through hunting, butchering, and keeping primate pets. Herein it is shown that this population is infected with a variety of HTLVs, including two retroviruses; HTLV-4 is the first member of a novel phylogenetic lineage that is distinct from all known HTLVs and STLVs; HTLV-3 falls within the genetic diversity of STLV-3, a group that has not previously been seen in humans. The present disclosure also relates to vectors and vaccines for use in humans against infection and disease. The disclosure further relates to a variety of bioassays and kits for the detection and diagnosis of infection with and diseases caused by HTLV-3 and HTLV-4 and related viruses.
    Type: Application
    Filed: February 24, 2007
    Publication date: November 27, 2008
    Inventors: William M. Switzer, Walid Heneine, Thomas M. Folks, Nathan D. Wolfe, Donald S. Burke, Eitel Mpoudi-Ngole
  • Patent number: 6800475
    Abstract: The present invention comprises compositions and methods comprising a spumavirus isolated from a human. More specifically, the spumavirus of the present invention was isolated from a human who had exposure to nonhuman primates. Importantly, the methods and compositions of the present invention comprising the spumavirus and including antibodies to the spumavirus, can be used to detect the presence of spumavirus or antibodies in body fluids, for pathogenicity studies of related viruses, and as a vector for gene therapies. The present invention can also be used for treatment of conditions in humans due to the presence of rapidly dividing cells and for recombinant live virus vaccination.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: October 5, 2004
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: William M. Switzer, Walid Heneine, Paul A. Sandstrom, Thomas M. Folks
  • Patent number: 6787126
    Abstract: An assay and kit for the detection of phenotypic resistance of a retrovirus to a reverse transcriptase inhibitor drug in a biological sample. The assay is based on the direct analysis of the susceptibility of retroviral reverse transcriptase to inhibition by a reverse transcriptase inhibitor drug. The enzymatic activity of the reverse transcriptase is determined by measuring the DNA product produced when an RNA template and a first complementary DNA primer from a suitable region of the encephalomyocarditis virus genome are incubated with a biological sample containing reverse transcriptase in the presence of the drug to which resistance is being determined.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: September 7, 2004
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: Walid M. Heneine, Gerardo Garcia Lerma, Shinji Yamamoto, William M. Switzer, Thomas M. Folks
  • Patent number: 6787333
    Abstract: The present invention comprises spumavirus isolated from humans. More specifically, the spumavirus of the present invention was isolated from humans who had exposure to nonhuman primates. Importantly, the spumavirus of the present invention or antibodies to the spumavirus can be used to detect the presence of spumavirus or antibodies in body fluids, for pathogenicity studies of related viruses, and as a vector for gene therapies. The spumavirus of the invention can also be used for treatment of conditions in humans due to the presence of rapidly dividing cells and for recombinant live virus vaccination.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: September 7, 2004
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: Margaret E. Callahan, Thomas M. Folks, Paul Sandstrom, Shambavi Subbarao, Jennifer Brown, Walid Heneine, William M. Switzer
  • Patent number: 6623952
    Abstract: The present invention comprises a spumavirus isolated from a human. More specifically, the spumavirus of the present invention was isolated from a human who had exposure to nonhuman primates. Importantly, the spumavirus of the present invention or antibodies to the spumavirus can be used to detect the presence of spumavirus or antibodies in body fluids, for pathogenicity studies of related viruses, and as a vector for gene therapies. The spumavirus of the invention can also be used for treatment of conditions in humans due to the presence of rapidly dividing cells and for recombinant live virus vaccination.
    Type: Grant
    Filed: September 5, 2001
    Date of Patent: September 23, 2003
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: Paul A. Sandstrom, Thomas M. Folks, Walid M. Heneine, William M. Switzer, Jennifer Brown
  • Publication number: 20030148307
    Abstract: Assays and kits for the detection of phenotypic resistance of a retrovirus to reverse transcriptase inhibitor drugs in a biological sample. The assays are based on the direct analysis of the susceptibility of retroviral reverse transcriptase to inhibition by a reverse transcriptase inhibitor drug. The enzymatic activity of the reverse transcriptase is determined by measuring the DNA product produced when an RNA template and a first complementary DNA primer from a suitable region of the encephalomyocarditis virus genome are incubated with a biological sample containing reverse transcriptase in the presence of the drug to which resistance is being determined. The incubation mixture is reacted under conditions whereby the RNA template and the DNA primer will anneal and a DNA strand will be synthesized as an extension from the DNA primer if the reverse transcriptase in the sample is resistant to and not inhibited by the drug.
    Type: Application
    Filed: July 3, 2002
    Publication date: August 7, 2003
    Applicant: Department of Health & Human Services, c/o Centers of Disease Control and Prevention
    Inventors: Walid M. Heneine, Gerardo Garcia Lerma, Shinji Yamamoto, William M. Switzer, Thomas M. Folks
  • Publication number: 20030148509
    Abstract: The present invention comprises spumavirus isolated from humans. More specifically, the spumavirus of the present invention was isolated from humans who had exposure to nonhuman primates. Importantly, the spumavirus of the present invention or antibodies to the spumavirus can be used to detect the presence of spumavirus or antibodies in body fluids, for pathogenicity studies of related viruses, and as a vector for gene therapies. The spumavirus of the invention can also be used for treatment of conditions in humans due to the presence of rapidly dividing cells and for recombinant live virus vaccination.
    Type: Application
    Filed: October 15, 2002
    Publication date: August 7, 2003
    Applicant: The Govt. of the USA, as represented by the secretary, Dept. of Health and Human Services
    Inventors: Margaret E. Callahan, Thomas M. Folks, Paul Sandstrom, Shambavi Subbarao, Jennifer Brown, Walid Heneine, William M. Switzer
  • Patent number: 6596478
    Abstract: The present invention comprises methods, devices and compositions for detection of endogenous retroviruses found in xenotransplant materials. The methods and compositions are suited for detection of endogenous type-C retroviruses and in particular, for porcine endogenous retrovirus, PERV.
    Type: Grant
    Filed: March 12, 2001
    Date of Patent: July 22, 2003
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: Walid M. Heneine, William M. Switzer, Paul A. Sandstrom, Aprille L. Matthews, Thomas M. Folks
  • Patent number: 6566102
    Abstract: Compositions, methods and diagnostic devices for monitoring graft integrity in xenotransplantation and for detecting infectious agents transmitted by the xenograft are described. In particular, the compositions, methods and devices are useful for determining porcine xenograft integrity and persistence and can detect the presence of PERV (porcine endogenous retrovirus) in a biological sample. The compositions, methods and devices are useful for determining or monitoring graft survival and rejection in recipients of xenografts and are useful for detecting the presence of pig cell and PERV infection in a xenotransplant recipient or donor. In addition, the compositions, methods and devices are useful for screening therapeutic products to be administered to humans to ensure that the products are free of pig cells, and thus free of PERV contamination, prior to administration.
    Type: Grant
    Filed: January 12, 2001
    Date of Patent: May 20, 2003
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: William M. Switzer, Walid Heneine, Shanmugam Vedapuri