Patents by Inventor Shanta Dhar

Shanta Dhar 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: 10845368
    Abstract: Nanoparticles include a core, a hydrophilic layer around the core, and one or more mitochondrial targeting moieties, and may optionally include one or more contrast agents or one or more therapeutic agents. For effective mitochondrial targeting the nanoparticles have a diameter of about 200 nm or less or have a zeta potential of about 0 mV or more.
    Type: Grant
    Filed: August 2, 2019
    Date of Patent: November 24, 2020
    Assignee: UNIVERSITY OF GEORGIA RESEARCH FOUNDATION, INC.
    Inventors: Shanta Dhar, Sean M. Marrache
  • Publication number: 20200003782
    Abstract: Nanoparticles include a core, a hydrophilic layer around the core, and one or more mitochondrial targeting moieties, and may optionally include one or more contrast agents or one or more therapeutic agents. For effective mitochondrial targeting the nanoparticles have a diameter of about 200 nm or less or have a zeta potential of about 0 mV or more.
    Type: Application
    Filed: August 2, 2019
    Publication date: January 2, 2020
    Inventors: Shanta Dhar, Sean M. Marrache
  • Patent number: 10457700
    Abstract: Disclosed herein are prodrugs of platinum containing anticancer agents such as cisplatin that contain an alkylating moiety. Upon administration, the prodrugs release the platinum containing anticancer agent and the alkylating agent, which can form an adduct with DNA or can protect the platinum containing agent from removal. The disclosed prodrugs can be used to treat various cancers, including cisplatin resistant cancers.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: October 29, 2019
    Assignee: UNIVERSITY OF GEORGIA RESEARCH FOUNDATION, INC.
    Inventors: Shanta Dhar, Rakesh Pathak
  • Patent number: 10416167
    Abstract: Nanoparticles include a core, a hydrophilic layer around the core, and one or more mitochondrial targeting moieties, and may optionally include one or more contrast agents or one or more therapeutic agents. For effective mitochondrial targeting the nanoparticles have a diameter of about 200 nm or less or have a zeta potential of about 0 mV or more.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: September 17, 2019
    Assignee: University of Georgia Research Foundation, Inc.
    Inventors: Shanta Dhar, Sean M. Marrache
  • Patent number: 10398663
    Abstract: A mitochondria targeted gold nanoparticle (T-3-BP-AuNP) decorated with 3-bromopyruvate (3-BP) and delocalized lipophilic triphenylphosphonium (TPP) cations to target the mitochondrial membrane potential (??m) was developed for delivery of 3-BP to cancer cell mitochondria by taking advantage of higher ??m in cancer cell compared to normal cells. This construct showed remarkable anticancer activity in prostate cancer cells compared to non-targeted construct NT-3-BP-AuNP and free 3-BP. Anticancer activity of T-3-BP-AuNP was further enhanced upon laser irradiation by exciting the surface plasmon resonance band of AuNP and thereby utilizing a combination of 3-BP chemotherapeutic and AuNP photothermal effects. T-3-BP-AuNPs showed markedly enhanced ability to alter cancer cell metabolism by inhibiting glycolysis and demolishing mitochondrial oxidative phosphorylation in prostate cancer cells.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: September 3, 2019
    Assignee: UNIVERSITY OF GEORGIA RESEARCH FOUNDATION, INC.
    Inventors: Shanta Dhar, Sean Marrache
  • Patent number: 10004809
    Abstract: Described is a targeted molecular scaffold for construction of a metabolic inhibitor loaded with cancer-cell specific activity and anti-tumor immunity. Incorporation of a mitochondria targeting moiety such as triphenylphosphonium cation through a biodegradable linker in allowed for mitochondria targeting of certain metabolic inhibitors like dichloroacetic acid (DCA).
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: June 26, 2018
    Assignee: University of Georgia Research Foundation Inc.
    Inventors: Shanta Dhar, Rakesh Pathak
  • Publication number: 20180066004
    Abstract: Pt(IV) compounds include a mitochondria targeting moiety. One example of a Pt(IV) compound having a mitochondria targeting moiety is a Pt(IV) cisplatin-based compound. Upon reduction, the mitochondrial targeting moieties are released resulting in a Pt(II) therapeutic agent. Pt(IV) compounds including a mitochondria targeting moiety can be included in nanoparticles. The compounds or nanoparticles can be used to treat, for example, cancer.
    Type: Application
    Filed: April 8, 2015
    Publication date: March 8, 2018
    Applicant: University of Georgia Research Foundation, Inc.
    Inventors: Shanta Dhar, Rakesh Pathak, Sean Marrache
  • Patent number: 9901616
    Abstract: Nanoparticles include a core and one or more targeting moieties, as well as one or more contrast agents or one or more therapeutic agents. The contrast agents or therapeutic agents may be contained or embedded within the core. If the nanoparticle includes therapeutic agents, the agents are preferably released from the core at a desired rate. The core may be biodegradable and may release the agents as the core is degraded or eroded. The targeting moieties preferably extend outwardly from the core so that they are available for interaction with cellular components, which interactions will target the nanoparticles to the appropriate cells, such as apoptotic cells; organelles, such as mitochondria; or the like. The targeting moieties may be tethered to the core or components that interact with the core.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: February 27, 2018
    Assignee: UNIVERSITY OF GEORGIA RESEARCH FOUNDATION, INC.
    Inventors: Shanta Dhar, Sean Marrache
  • Publication number: 20180044362
    Abstract: Disclosed herein are prodrugs of platinum containing anticancer agents such as cisplatin that contain an alkylating moiety. Upon administration, the prodrugs release the platinum containing anticancer agent and the alkylating agent, which can form an adduct with DNA or can protect the platinum containing agent from removal. The disclosed prodrugs can be used to treat various cancers, including cisplatin resistant cancers.
    Type: Application
    Filed: March 7, 2016
    Publication date: February 15, 2018
    Inventors: Shanta Dhar, Rakesh Pathak
  • Publication number: 20170367989
    Abstract: Nanoparticles include a polymeric core and a high density lipoprotein (HDL) component where the ratio by weight of the HDL component to the polymeric core is in a range from about 1:9 to about 9:1, such as about 75:25 or less or about 7:3 or less. The nanoparticles may also include a mitochondria targeting moiety. The nanoparticles may be used to treat or prevent atherosclerosis or to maintain lipid homeostasis.
    Type: Application
    Filed: December 22, 2015
    Publication date: December 28, 2017
    Inventors: Shanta Dhar, Sean Marrrache, Ru Wen, Bhabatosh Banik
  • Publication number: 20170216219
    Abstract: Nanoparticles containing a mitochondrial that are capable of crossing the blood-brain barrier and that have a targeting moiety, an antioxidant and an anti-inflammatory agent may be useful for treatment of traumatic brain injury.
    Type: Application
    Filed: August 3, 2015
    Publication date: August 3, 2017
    Inventors: Shanta Dhar, Emily Wyatt Baker, Sean Marrache, Franklin D. West
  • Publication number: 20170190726
    Abstract: Pt(IV) prodrugs include one or more conjugated cyclooxygenase inhibitor. Reduction of Pt(IV) to Pt(II) can result cisplatin and a cyclooxygenase inhibitor. For proof of concept, a Pt(IV) prodrug that can produce cisplatin and aspirin, Platin-A, was synthesized. Platin-A exhibited excellent anticancer and anti-inflammatory properties, which were better than the combination of free formulation of cisplatin and aspirin.
    Type: Application
    Filed: December 12, 2014
    Publication date: July 6, 2017
    Inventors: Shanta Dhar, Rakesh Pathak
  • Publication number: 20170096443
    Abstract: Reactions of 1,3-dipole-functional (e.g., azide-functional) platinum(IV) compounds with cyclic alkynes under conditions effective for a cycloaddition reaction to form a heterocyclic compound are disclosed herein. In certain embodiments, the conditions effective for the cycloaddition reaction to form the heterocyclic compound includes the substantial absence of added catalyst (e.g., copper catalyst).
    Type: Application
    Filed: March 4, 2015
    Publication date: April 6, 2017
    Inventors: Shanta Dhar, Rakesh Pathak, Vladimir V. Popik, Christopher D. McNitt
  • Publication number: 20170087167
    Abstract: Aspirin is chemically modified to generate a prodrug that releases aspirin in cellular milieu. The prodrug has a lipophilic tail that may enhance uptake efficiency in nanoparticles. Nanoparticles including the prodrugs may be effective for treating inflammatory disorders, including neurodegenerative disorders.
    Type: Application
    Filed: September 29, 2016
    Publication date: March 30, 2017
    Inventors: Akil Abraham Kalathil, Bhabatosh Banik, Anil Kumar, Shanta Dhar
  • Publication number: 20170037071
    Abstract: Pt(IV) compounds include a mitochondria targeting moiety. One example of a Pt(IV) compound having a mitochondria targeting moiety is a Pt(IV) cisplatin-based compound. Upon reduction, the mitochondrial targeting moieties are released resulting in a Pt(II) therapeutic agent. Pt(IV) compounds including a mitochondria targeting moiety can be included in nanoparticles. The compounds or nanoparticles can be used to treat, for example, cancer.
    Type: Application
    Filed: April 8, 2015
    Publication date: February 9, 2017
    Applicant: University of Georgia Research Foundation, Inc.
    Inventors: Shanta Dhar, Rakesh Pathak, Sean Marrache
  • Publication number: 20170014361
    Abstract: A mitochondria targeted gold nanoparticle (T-3-BP-AuNP) decorated with 3-bromopyruvate (3-BP) and delocalized lipophilic triphenylphosphonium (TPP) cations to target the mitochondrial membrane potential (??m) was developed for delivery of 3-BP to cancer cell mitochondria by taking advantage of higher ??m in cancer cell compared to normal cells. This construct showed remarkable anticancer activity in prostate cancer cells compared to non-targeted construct NT-3-BP-AuNP and free 3-BP. Anticancer activity of T-3-BP-AuNP was further enhanced upon laser irradiation by exciting the surface plasmon resonance band of AuNP and thereby utilizing a combination of 3-BP chemotherapeutic and AuNP photothermal effects. T-3-BP-AuNPs showed markedly enhanced ability to alter cancer cell metabolism by inhibiting glycolysis and demolishing mitochondrial oxidative phosphorylation in prostate cancer cells.
    Type: Application
    Filed: March 13, 2015
    Publication date: January 19, 2017
    Inventors: Shanta Dhar, Sean Marrache
  • Publication number: 20170000740
    Abstract: Nanoparticles that include a chemotherapeutic agent and an anti-inflammatory are particularly cytotoxic to prostate cancer cells.
    Type: Application
    Filed: April 9, 2014
    Publication date: January 5, 2017
    Inventors: Shanta Dhar, Rakesh Kumar Pathak
  • Patent number: 9517277
    Abstract: Provides is a therapeutic technology that combines the phototoxic and immune-stimulating ability of photodynamic therapy with the widespread effectiveness of the immune system to reduce the viability of such as cancer cells and tumors. The nanoparticle compositions of the disclosure combine an immunostimulant with a photosensitizer using a nanoparticle delivery platform. For example, zinc pthalocyanine, which is a long-wavelength absorbing photosensitizer, integrated into a polymeric nanoparticle core made up of poly(D,L-lactic-co-glycolic acid)-b-poly(ethylene glycol) (PLGA-b-PEG). The outside surface of the core can be coated with metallic nanoparticles, which are then modified with CpG-ODN. Metastatic mouse breast carcinoma cells showed significant photocytotoxicity of the hybrid after irradiation with a 660 nm LASER light and this activity was remarkably better than either treatment alone.
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: December 13, 2016
    Assignee: University of Georgia Research Foundation, Inc.
    Inventors: Shanta Dhar, Joshua Choi, Sean Marrache
  • Publication number: 20160326200
    Abstract: Pt(IV) prodrugs include one or more conjugated cyclooxygenase inhibitor. Reduction of Pt(IV) to Pt(II) can result cisplatin and a cyclooxygenase inhibitor. For proof of concept, a Pt(IV) prodrug that can produce cisplatin and aspirin, Platin-A, was synthesized. Platin-A exhibited excellent anticancer and anti-inflammatory properties, which were better than the combination of free formulation of cisplatin and aspirin.
    Type: Application
    Filed: December 12, 2014
    Publication date: November 10, 2016
    Inventors: Shanta Dhar, Rakesh Pathak
  • Patent number: 9265747
    Abstract: The present invention provides compositions, preparations, formulations, kits, and methods useful for treating subjects in need of therapeutic protocol, including subjects having cancer or at risk of developing cancer. Some embodiments of the invention may comprise a composition comprising a first component comprising a precursor to a therapeutically active platinum agent and a precursor to a second therapeutically active agent. The therapeutically active platinum agent and the second therapeutically active agent may dissociate from each other, thereby forming a first therapeutically active platinum agent and a second therapeutically active agent. The second therapeutically active gent may affect a cellular pathway of a cancer cell and may be substantially inactive towards non-cancerous cells.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: February 23, 2016
    Assignee: Massachusetts Institute of Technology
    Inventors: Stephen J. Lippard, Shanta Dhar