Patents by Inventor Jamshid Tanha
Jamshid Tanha 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).
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Publication number: 20150307597Abstract: Campylobacter jejuni is a leading cause of bacterial food-borne diseases in humans, ranging from acute diarrheal disease to neurological disorders. An isolated or purified antibody or fragment thereof specific to C. jejuni is described. The antibody or fragment thereof binds to a flagellar protein and reduces motility of C. jejuni. The antibody or fragment thereof is derived from a heavy chain IgG variable domain fragment (VHH) of a camelid animal immunized with C. jejuni flagellar protein. A multivalent form, as well as a phage format, of the antibody or fragment thereof is described. Methods of reducing presence of C. jejuni in an animal or an animal environment, methods and formulations for treating C. jejuni infection, and method of detecting C. jejuni are also described.Type: ApplicationFiled: October 24, 2013Publication date: October 29, 2015Applicant: NATIONAL RESEARCH COUNCIL OF CANADAInventors: Mehdi ARBABI GHAHROUDI, Ali RIAZI, Christine M. SZYMANSKI, Greg HUSSACK, Jamshid TANHA, Roger MACKENZIE
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Patent number: 8715659Abstract: A phage-displayed library of llama single heavy domain antibodies (sdAbs) was enriched for species that selectively bind to and are internalized by human cerebromicrovascular endothelial cells (HCEC). From the enriched library, two sdAbs were selected, sequenced, subcloned, and expressed as fusion proteins with c-myc-His5 tags (His5 is SEQ ID NO:101). Similarly as phage-displayed sdAbs, these soluble tagged sdAbs were shown to selectively bind to HCEC and to transmigrate across in vitro human blood-brain barrier (BBB) model. In contrast to an unrelated llama sdAb, these sdAbs were also detected in the brain after i.v. injection into mice. These small (˜13 kDa) antibody fragments have essential characteristics of brain-specific delivery vectors and can be used to facilitate drug transport across the BBB.Type: GrantFiled: February 22, 2013Date of Patent: May 6, 2014Assignee: National Research Council of CanadaInventors: Arumugam Muruganandam, Jamshid Tanha, Saran Narang, Danica Stanimirovic
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Publication number: 20130303406Abstract: The present invention provides a single domain antibody (sdAb) scaffold comprising one or more than one non-canonical disulfide bond in the framework region (FR). The one or more than one non-canonical disulfide bond may be formed between cysteines introduced by mutations in FR2 and FR3. In the case where the sdAb scaffold is a VH, the Cys may be introduced at any one of positions (47-49) and any one of positions (67-71), based on Kabat numbering; in one example, the Cys may be introduced at positions (49) and (69), based on Kabat numbering. In the case where the sdAb scaffold is a VL, the Cys residues may be introduced at any one of positions 46-49 and any one of positions (62-66), based on Kabat numbering; in one example, the Cys residues may be introduced at positions (48 and 64), based on Kabat numbering.Type: ApplicationFiled: January 27, 2012Publication date: November 14, 2013Applicant: National Research Council of CanadaInventors: Dae Young Kim, Jamshid Tanha
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Publication number: 20130230537Abstract: The present invention is directed to Clostridium difficile toxin-specific antibodies, compositions, and uses thereof. The anti-toxin antibodies may be specific for either TcdA or TcdB. The invention also includes methods of treating a Clostridium difficile infection, methods of capturing Clostridium difficile toxins, and methods of detecting Clostridium difficile toxins.Type: ApplicationFiled: October 25, 2011Publication date: September 5, 2013Inventors: Greg Hussack, Mehdi Nath Arbabi-Ghahroudi, Roger Mackenzie, Jamshid Tanha
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Patent number: 8383107Abstract: A phage-displayed library of llama single heavy domain antibodies (sdAbs) was enriched for species that selectively bind to and are internalized by human cerebromicrovascular endothelial cells (HCEC). From the enriched library, two sdAbs were selected, sequenced, subcloned, and expressed as fusion proteins with c-myc-His5 tags (His5 is SEQ ID NO:101). Similarly as phage-displayed sdAbs, these soluble tagged sdAbs were shown to selectively bind to HCEC and to transmigrate across in vitro human blood-brain barrier (BBB) model. In contrast to an unrelated llama sdAb, these sdAbs were also detected in the brain after i.v. injection into mice. These small (˜13 kDa) antibody fragments have essential characteristics of brain-specific delivery vectors and can be used to facilitate drug transport across the BBB.Type: GrantFiled: March 21, 2011Date of Patent: February 26, 2013Assignee: National Research Council of CanadaInventors: Arumugam Muruganandam, Jamshid Tanha, Saran Narang, Danica Stanimirovic
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Patent number: 8372954Abstract: Phage display libraries are taught in which the recombinant phage population displays a plurality of potential binding fragments having preferred characteristics of solubility and/or intermolecular interaction. Also taught are methods of biasing display libraries to produce variants which more closely approximate the preferred characteristics of the parental binding fragment.Type: GrantFiled: December 21, 2001Date of Patent: February 12, 2013Assignee: National Research Council of CanadaInventors: Jamshid Tanha, Joycelyn Entwistle, Saran Narang, Michael Dan, Colin R. Mackenzie, Carole Grad
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Patent number: 8361462Abstract: Single-domain anti-bodies that bind pro-apoptotic proteins Bax and caspase-3 are identified and isolated. These single-domain antibodies may be used to modulate the active of Bax and caspase-3, thereby modulating the symptoms and steps of oxidative stress and/or cell apoptosis, including Bax dimerization, mitochondrial permeabilization and the release of apoptotic proteins.Type: GrantFiled: September 1, 2006Date of Patent: January 29, 2013Assignees: National Research Council of Canada, University of WindsorInventors: Siyaram Pandey, Jamshid Tanha, Deyzi Gueorguieva
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Patent number: 8293233Abstract: Polypeptides with desirable biophysical properties such as solubility, stability, high expression, monomericity, binding specificity or non-aggregation, including monomeric human VHs and VLs, are identified using a high throughput method for screening polypeptides, comprising the steps of obtaining a phage display library, allowing infection of a bacterial lawn by the library phage, and identifying phage which form larger than average plaques on the bacterial lawn. Sequences of monomeric human VHs and VLs are identified, which may be useful for immunotherapy or as diagnostic agents. Multimer complexes of human VHs and VLs are also identified. The VHs and VLs identified may be used to create further libraries for identifying additional polypeptides. Further, the VHs and VLs may be subjected to DNA shuffling to select for improved biophysical properties.Type: GrantFiled: March 24, 2006Date of Patent: October 23, 2012Assignee: National Research Council of CanadaInventor: Jamshid Tanha
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Patent number: 8257705Abstract: A phage display library of variable heavy domain (VHH or VH) fragments (sdAb fragments) derived from the antibody repertoire of a non-immunized llama is disclosed. The sdAb fragments of the library are characterized by the absence of cysteine residues in complementarity determining regions (CDRs) and a very low presence of residues of glutamic acid, arginine and glycine at positions 44, 45 and 47, respectively, of the VL interface of the variable heavy domain VHH. The large size of the library (in the order of 109) makes it a source of antigen-binding fragments having high affinity to almost any antigen of interest. The library is preferably generated using a modified fd-tet phage growing in plaques in the absence of a tetracycline.Type: GrantFiled: June 29, 2006Date of Patent: September 4, 2012Assignee: National Research Council of CanadaInventors: Jamshid Tanha, Ginette Dubuc, Saran Narang
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Publication number: 20110269148Abstract: A nanoaggregate embedded bead is formed from an inner core formed of comprising metallic nanoparticles and Raman active reporter molecules, an outer shell, and single-domain antibodies to target the bead to a specific target. The nanoaggregate embedded bead may be used in methods to detect analytes or pathogens in biological or environmental samples using Raman spectroscopy.Type: ApplicationFiled: November 26, 2009Publication date: November 3, 2011Applicants: NATIONAL CHENG CHUNG UNIVERSITY, NATIONAL RESEARCH COUNCIL OF CANADAInventors: Ping-Ji Huang, Lai-Kwan Chau, Li-Lin Tay, Jamshid Tanha
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Publication number: 20110143997Abstract: The subject invention relates in part to novel uses of bacteriophage tail spike proteins (TSPs). Some preferred uses are therapeutic uses in animals, such as chickens, against pathogenic bacteria, such as Salmonella. Fragments of the TSPs can also be used according to the subject invention, particularly protein fragments comprising the phage receptor binding domains (PRBDs), which recognize their hosts and facilitate infection. The binding domains are specific to unique surface structures on bacteria and may be used for a variety of applications according to the subject invention. We have shown that by utilizing these PRBDs, it is possible to exploit the long-established evolutionary relationship between bacteria and their viruses (ie bacteriophages) that specifically infect them. The subject invention also relates in part to novel, synthetic forms of tail spike proteins. In some preferred embodiments, these are hexamers.Type: ApplicationFiled: March 28, 2008Publication date: June 16, 2011Applicants: Dow AgroSciences LLC, National Research Council of CanadaInventors: Matthew J. Henry, Roger C. Mackenzie, Christine Szymanski, Jamshid Tanha
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Publication number: 20110052565Abstract: The present invention relates to non-aggregating VH domains or libraries thereof. The VH domains comprise at least one disulfide linkage-forming cysteine in at least one complementarity-determining region (CDR) and an acidic isoelectric point (pI). A method of increasing the power or efficiency of selection of non-aggregating VH domains comprises panning a phagemid-based VH domain phage-display library in combination with a step of selecting non-aggregating phage-VH domains. Compositions of matter comprising the non-aggregating VH domains, as well as methods of use are also provided.Type: ApplicationFiled: December 22, 2008Publication date: March 3, 2011Applicant: NATIONAL RESEARCH COUNCIL OF CANADAInventors: Mehdi Arbabi-Ghahroudi, Jamshid Tanha
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Publication number: 20090324579Abstract: Single-domain anti-bodies that bind pro-apoptotic proteins Bax and caspase-3 are identified and isolated. These single-domain antibodies may be used to modulate the active of Bax and caspase-3, thereby modulating the symptoms and steps of oxidative stress and/or cell apoptosis, including Bax dimerization, mitochondrial permeabilization and the release of apoptotic proteins.Type: ApplicationFiled: September 1, 2006Publication date: December 31, 2009Inventors: Siyaram Pandey, Jamshid Tanha, Deyzi Sumame
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Publication number: 20090220485Abstract: Polypeptides with desirable biophysical properties such as solubility, stability, high expression, monomericity, binding specificity or non-aggregation, including monomeric human VHs and VLs, are identified using a high throughput method for screening polypeptides, comprising the steps of obtaining a phage display library, allowing infection of a bacterial lawn by the library phage, and identifying phage which form larger than average plaques on the bacterial lawn. Sequences of monomeric human VHs and VLs are identified, which may be useful for immunotherapy or as diagnostic agents. Multimer complexes of human VHs and VLs are also identified. The VHs and VLs identified may be used to create further libraries for identifying additional polypeptides. Further, the VHs and VLs may be subjected to DNA shuffling to select for improved biophysical properties.Type: ApplicationFiled: March 24, 2006Publication date: September 3, 2009Inventor: Jamshid Tanha
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Publication number: 20090162422Abstract: A phage-displayed library of llama single heavy domain antibodies (sdAbs) was enriched for species that selectively bind to and are internalized by human cerebromicrovascular endothelial cells (HCEC). From the enriched library, two sdAbs were selected, sequenced, subcloned, and expressed as fusion proteins with c-myc-His5 tags. Similarly as phage-displayed sdAbs, these soluble tagged sdAbs were shown to selectively bind to HCEC and to transmigrate across in vitro human blood-brain barrier (BBB) model. In contrast to an unrelated llama sdAb, these sdAbs were also detected in the brain after i.v. injection into mice. These small (˜13 kDa) antibody fragments have essential characteristics of brain-specific delivery vectors and can be used to facilitate drug transport across the BBB.Type: ApplicationFiled: July 23, 2007Publication date: June 25, 2009Applicants: the National Research Council Act by the Parliament of CanadaInventors: Arumugam Muruganandam, Jamshid Tanha, Saran Narang, Danica Stanimirovic
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Publication number: 20050164180Abstract: Phage display libraries are taught in which the recombinant phage population displays a plurality of potential binding fragments having preferred characteristics of solubility and/or intermolecular interaction. Also taught are methods of biasing display libraries to produce variants which more closely approximate the preferred characteristics of the parental binding fragment.Type: ApplicationFiled: December 21, 2001Publication date: July 28, 2005Inventors: Jamshid Tanha, Joycelyn Entwistle, Saran Narang, Michael Dan, Colin Mackenzie, Howard Kaplan, Carole Grad