Patents by Inventor Ram Sasisekharan

Ram Sasisekharan 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: 7939292
    Abstract: The invention relates to heparinase III and mutants thereof. Modified forms of heparinase III having reduced enzymatic activity which are useful for a variety of purposes, including sequencing of heparin-like glycosaminoglycans (HLGAGs), removing active heparan sulfate from a solution, inhibition of angiogenesis, etc. have been discovered according to the invention. The invention in other aspects relates to methods of treating cancer and inhibiting tumor cell growth and/or metastasis using heparinase III, or products produced by enzymatic cleavage by heparinase III of HLGAGs.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: May 10, 2011
    Assignee: Massachusetts Institute of Technology
    Inventors: Dongfang Liu, Kevin Pojasek, Zachary Shriver, Kristine Holley, Yosuf El-Shabrawi, Ganesh Venkataraman, Ram Sasisekharan
  • Publication number: 20110033490
    Abstract: The present invention provides HA polypeptides (e.g., H1 HA polypeptides) that bind to umbrella-topology glycans, and reagents and methods relating thereto. The present invention provides binding agents that bind to HA polypeptides (e.g., H1 HA polypeptides), and reagents and methods relating thereto. The present invention provides interfering agents that inhibit the binding of HA polypeptides (e.g., H1 HA polypeptides) to HA receptors, and reagents and methods relating thereto. The present invention provides compositions and methods for treating, preventing, and/or diagnosing influenza infection utilizing HA polypeptides, HA polypeptide binding agents, HA polypeptide interfering agents, and/or vaccine compositions comprising any of the foregoing.
    Type: Application
    Filed: July 2, 2010
    Publication date: February 10, 2011
    Applicant: Massachusetts Institute of Technology
    Inventors: Akila Jayaraman, Karthik Viswanathan, Rahul Raman, Zachary H. Shriver, Ram Sasisekharan
  • Publication number: 20110033901
    Abstract: This invention is related, in part, to sulfatase enzymes and methods of their use.
    Type: Application
    Filed: October 22, 2010
    Publication date: February 10, 2011
    Applicant: Massachusetts Institute of Technology
    Inventors: James R. Myette, Ram Sasisekharan
  • Publication number: 20100317614
    Abstract: Provided herein are compositions and kits comprising carbohydrate-based inhibitors that bind GNBP and/or inhibit ?(1,3)-glucanase activity. Also provided are methods of using such inhibitors to protect against or treat pest infestation, as are compositions and kits comprising subparts of the carbohydrate-based inhibitors.
    Type: Application
    Filed: May 11, 2010
    Publication date: December 16, 2010
    Applicants: Massachusetts Institute of Technology, Northeastern University
    Inventors: Ido Bachelet, Ram Sasisekharan, Mark Bulmer, Rebeca B. Rosengaus
  • Publication number: 20100303912
    Abstract: Nanocells allow the sequential delivery of two different therapeutic agents with different modes of action or different pharmacokinetics. A nanocell is formed by encapsulating a nanocore with a first agent inside a lipid vesicle containing a second agent. The agent in the outer lipid compartment is released first and may exert its effect before the agent in the nanocore is released. The nanocell delivery system may be formulated in pharmaceutical composition for delivery to patients suffering from diseases such as cancer, inflammatory diseases such as asthma, autoimmune diseases such as rheumatoid arthritis, infectious diseases, and neurological diseases such as epilepsy. In treating cancer, a traditional antineoplastic agent is contained in the outer lipid vesicle of the nanocell, and an antiangiogenic agent is loaded into the nanocore. This arrangement allows the antineoplastic agent to be released first and delivered to the tumor before the tumor's blood supply is cut off by the antianiogenic agent.
    Type: Application
    Filed: May 14, 2010
    Publication date: December 2, 2010
    Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Shiladitya Sengupta, Ganlin Zhao, Ishan Capila, David Eavarone, Ram Sasisekharan
  • Patent number: 7842492
    Abstract: This invention is related, in part, to sulfatase enzymes and methods of their use.
    Type: Grant
    Filed: January 4, 2008
    Date of Patent: November 30, 2010
    Assignee: Massachusetts Institute of Technology
    Inventors: James R. Myette, Ram Sasisekharan
  • Publication number: 20100272822
    Abstract: Nanocells allow the sequential delivery of two different therapeutic agents with different modes of action or different pharmacokinetics. A nanocell is formed by encapsulating a nanocore with a first agent inside a lipid vesicle containing a second agent. The agent in the outer lipid compartment is released first and may exert its effect before the agent in the nanocore is released. The nanocell delivery system may be formulated in pharmaceutical composition for delivery to patients suffering from diseases such as cancer, inflammatory diseases such as asthma, autoimmune diseases such as rheumatoid arthritis, infectious diseases, and neurological diseases such as epilepsy. In treating cancer, a traditional antineoplastic agent is contained in the outer lipid vesicle of the nanocell, and an antiangiogenic agent is loaded into the nanocore. This arrangement allows the antineoplastic agent to be released first and delivered to the tumor before the tumor's blood supply is cut off by the antiangiogenic agent.
    Type: Application
    Filed: June 4, 2010
    Publication date: October 28, 2010
    Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: SHILADITYA SENGUPTA, GANLIN ZHAO, ISHAN CAPILA, DAVID EAVARONE, RAM SASISEKHARAN
  • Publication number: 20100248260
    Abstract: The present invention is directed to metallic particles coated with glycosaminoglycans and methods for preparing them. Methods of using such glycosaminoglycan-coated metallic particles in biomedical and other applications are also disclosed. In certain embodiments, methods for assaying glycosaminoglycan-degrading activity in biological fluids, test samples, and/or therapeutic formulations using the glycosaminoglycan-coated particles are provided. Such methods may be used, for example, in diagnostic tests for diseases such as cancer, inflammatory diseases, or autoimmune diseases and to test activity of enzymes being developed as therapeutics.
    Type: Application
    Filed: December 5, 2008
    Publication date: September 30, 2010
    Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Zhihui BAN, Carlos Bosques, Ram Sasisekharan
  • Publication number: 20100216176
    Abstract: The invention relates to methods for analyzing polysaccharides. In particular, compositional and sequence information about the polysaccharides are derived. Some methods use NMR in conjunction with another experimental method, such as, capillary electrophoretic techniques for the analysis.
    Type: Application
    Filed: May 5, 2010
    Publication date: August 26, 2010
    Applicants: Massachusetts Institute of Technology, Istituto di Ricerche Chimiche e Biochimiche G. Ronzoni
    Inventors: RAM SASISEKHARAN, Ganesh Venkataraman, Rahul Raman, Benito Casu, Giangiacomo Torri, Marco Guerrini
  • Patent number: 7737692
    Abstract: The invention relates to methods for analyzing polysaccharides. In particular, compositional and sequence information about the polysaccharides are derived. Some methods use NMR in conjunction with another experimental method, such as, capillary electrophoretic techniques for the analysis.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: June 15, 2010
    Assignees: Massachusetts Institute of Technology, Istituto di Ricerche Chimiche e Biochimiche G. Ronzoni
    Inventors: Ram Sasisekharan, Ganesh Venkataraman, Rahul Raman, Benito Casu, Giangiacomo Torri, Marco Guerrini
  • Publication number: 20100144553
    Abstract: The invention relates, in part, to the improved analysis of carbohydrates. In particular, the invention relates to the analysis of carbohydrates, such as N-glycans and O-glycans found on proteins and saccharides attached to lipids. Improved methods, therefore, for the study of glycosylation patterns on cells, tissue and body fluids are also provided. Information from the analysis of glycans, such as the glycosylation patterns on cells, tissues and in body fluids, can be used in diagnostic and treatment methods as well as for facilitating the study of the effects of glycosylation/altered glycosylation. Such methods are also provided. Methods are further provided to assess production processes, to assess the purity of samples containing glycoconjugates, and to select glycoconjugates with the desired glycosylation.
    Type: Application
    Filed: November 20, 2009
    Publication date: June 10, 2010
    Applicants: MASSACHUSETTS INSTITUTE OF TECHNOLOGY, MOMENTA PHARMACEUTICALS, INC.
    Inventors: Carlos Bosques, Nishla Keiser, Aravind Srinivasan, Rahul Raman, Karthik Viswanathan, Ram Sasisekharan, Pankaj Gandhe, Sasi Raguram
  • Publication number: 20100136599
    Abstract: The invention relates, in part, to the improved analysis of carbohydrates. In particular, the invention relates to the analysis of carbohydrates, such as N-glycans and O-glycans found on proteins. Improved methods, therefore, for the study of glycosylation patterns on cells, tissue and body fluids are also provided. Information regarding the analysis of glycans, such as the glycosylation patterns on cells, tissues and in body fluids, can be used in diagnostic and treatment methods as well as for facilitating the study of the effects of glycosylation/altered glycosylation on protein function. Such methods are also provided. Methods are also provided to assess protein production processes, to assess the purity of proteins produced, and to select proteins with the desired glycosylation.
    Type: Application
    Filed: October 6, 2009
    Publication date: June 3, 2010
    Applicants: Massachusetts Institute of Technology, Momenta Pharmaceuticals, Inc.
    Inventors: Pankaj Gandhe, Sasi Raguram, Carlos Bosques, Nishla Keiser, Aravind Srinivasan, Ram Sasisekharan
  • Patent number: 7728589
    Abstract: The invention relates to methods for analyzing polysaccharides. In particular, compositional and sequence information about the polysaccharides are derived. Some methods use NMR in conjunction with another experimental method, such as, capillary electrophoretic techniques for the analysis.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: June 1, 2010
    Assignees: Massachusetts Institute of Technology, Instituto di Ricerche Chimiche e Biochimiche G. Ronzoni
    Inventors: Ram Sasisekharan, Ganesh Venkataraman, Rahul Raman, Benito Casu, Giangiacomo Torri, Marco Guerrini
  • Publication number: 20100129868
    Abstract: The invention relates to ?4,5 glycuronidase, related compositions, and methods of use thereof.
    Type: Application
    Filed: November 11, 2009
    Publication date: May 27, 2010
    Applicant: Massachusetts Institute of Technology
    Inventors: James R. Myette, Zachary Shriver, Ganesh Venkataraman, Ram Sasisekharan, Maitland W. McLean
  • Publication number: 20100125043
    Abstract: The present invention provides a system for analyzing glycans and their interaction partners. The inventive system is particularly useful in the identification and analysis of glycoprotein binding interactions.
    Type: Application
    Filed: August 14, 2007
    Publication date: May 20, 2010
    Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Ram Sasisekharan, S. Raguram, Mahadevan Venkataraman, Subramanian Kaundinya, Rahul Raman
  • Publication number: 20100119494
    Abstract: This invention relates, in part, to methods and compositions that modulate the stem cell environment. More specifically, the invention relates, in part, to methods and compositions for modulating stem cell differentiation. Therefore, methods and compositions are provided for modulating glycosaminoglycan moieties, e.g., heparan sulfate glycosaminoglycan (HSGAG) moieties, in the microenvironment of stem cells. Methods and compositions for promoting or inhibiting embryonic stem cell differentiation (e.g., differentiation into endothelial cells) are also provided. This invention also relates, therefore, in part, to cell populations (e.g., endothelial cell populations or impoverished endothelial cell populations) that can be produced with the methods and compositions provided. Furthermore, the invention relates, in part, to tissues, and uses thereof, formed by the methods and compositions provided. Moreover, the invention also relates, in part, to methods of treatment using the methods and compositions provided.
    Type: Application
    Filed: January 19, 2010
    Publication date: May 13, 2010
    Applicant: Massachusetts Institute of Technology
    Inventors: SHILADITYA SENGUPTA, RAM SASISEKHARAN, NISHLA KEISER, DAVID EAVARONE, TANYEL KIZILTEPE BILGICER, AARTHI CHANDRASEKARAN, DAVID A. BERRY, KRISTINE HOLLEY
  • Patent number: 7709461
    Abstract: The invention relates to methods for delivering polysaccharides by a pulmonary route to achieve local and systemic therapeutic effects. The polysaccharides may be formulated or unformulated and in some instances have an extremely fast absorption rate.
    Type: Grant
    Filed: October 18, 2001
    Date of Patent: May 4, 2010
    Assignee: Massachusetts Institute of Technology
    Inventors: Dongfang Liu, Yiwei Qi, Ganesh Venkataraman, Mallikarjun Sundaram, Ram Sasisekharan
  • Patent number: 7695711
    Abstract: The invention relates to ?4,5 glycuronidase, related compositions, and methods of use thereof.
    Type: Grant
    Filed: April 11, 2006
    Date of Patent: April 13, 2010
    Assignee: Massachusetts Institute of Technology
    Inventors: James R. Myette, Zachary Shriver, Ganesh Venkataraman, Ram Sasisekharan, Maitland W. McLean
  • Patent number: 7687479
    Abstract: The invention relates, in part, to methods and products related to producing low molecular weight heparin.
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: March 30, 2010
    Assignee: Massachusetts Institute of Technology
    Inventors: Ram Sasisekharan, Ganesh Venkataraman, Zachary Shriver, Dongfang Liu, Mallikarjun Sundaram, Yiwei Qi
  • Publication number: 20100062468
    Abstract: The invention relates to methods and products for characterizing and using polysaccharides. Low molecular weight heparin products and methods of use are described. Methods for characterizing purity and activity of polysaccharide preparations including glycosaminoglycans such as heparin are also described.
    Type: Application
    Filed: July 27, 2009
    Publication date: March 11, 2010
    Applicant: Massachusetts Institute of Technology
    Inventors: Ram Sasisekharan, Ganesh Venkataraman, Zachary Shriver, Dongfang Liu, Mallikarjun Sundaram, Yiwei Qi