Patents by Inventor Gilbert Arthur

Gilbert Arthur 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: 11261210
    Abstract: Glycosylated antitumor ether lipids (GAELs) are effective cytotoxic agents against cancer stem cells. Furthermore, combining GAELs which kill cells by a caspase-independent pathway with agents that kill cells by apoptosis will lead to elimination of the differentiated tumor cells and the undifferentiated cancer stem cells leading to an elimination of the tumor and preventing recurrence.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: March 1, 2022
    Assignee: University of Manitoba
    Inventors: Gilbert Arthur, Frank Schweizer, Pranati Samadder, Yaozu Xu
  • Patent number: 10806746
    Abstract: Glycosylated Antitumor Ether Lipids (GAELs) kill cancer cells by a nonapoptotic pathway which is an attractive strategy to avoid resistance. To further optimize the antitumor effect, we prepared various analogs of di-, and tri-cationic GAEL analogs differing in the nature of the sugar (D-glucose or L-glucose), the anomeric linkage as well as position of the glycerolipid moiety. The di- and tri-cationic GAELs were synthesized and their in vitro anticancer properties were evaluated against drug resistant and aggressively growing cancer cell lines derived from human breast, prostate, pancreatic and ovarian cancers. The most potent dicationic GAEL analogs were also studied against cancer stem cells obtained from breast BT 474, prostate DU145 and ovarian A2780cp cell lines. Our results indicate that the number of positive charges, the position of the amino substituents and the nature of the sugar have significant effects on the anticancer activities of these compounds.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: October 20, 2020
    Inventors: Makanjuola Ogunsina, Pranati Samadder, Frank Schweizer, Gilbert Arthur, Temilolu Idowu
  • Publication number: 20170189438
    Abstract: Glycosylated Antitumor Ether Lipids (GAELs) kill cancer cells by a nonapoptotic pathway which is an attractive strategy to avoid resistance. To further optimize the antitumor effect, we prepared various analogs of di-, and tri-cationic GAEL analogs differing in the nature of the sugar (D-giucose or L-glucose), the anomeric linkage as well as position of the glycerolipid moiety. The di- and tri-cationic GAELs were synthesized and their in vitro anticancer properties were evaluated against drug resistant and aggressively growing cancer cell lines derived from human breast, prostate, pancreatic and ovarian cancers. The most potent dicationic GAEL analogs were also studied against cancer stem cells obtained from breast BT 474, prostate DU145 and ovarian A2780cp cell lines. Our results indicate that the number of positive charges, the position of the amino substituents and the nature of the sugar have significant effects on the anticancer activities of these compounds.
    Type: Application
    Filed: May 29, 2015
    Publication date: July 6, 2017
    Inventors: Makanjuola Ogunsina, Pranati Samadder, Frank Schweizer, Gilbert Arthur, Temilolu Idowu
  • Publication number: 20150011486
    Abstract: Glycosylated antitumor ether lipids (GAELs) are effective cytotoxic agents against cancer stem cells. Furthermore, combining GAELs which kill cells by a caspase-independent pathway with agents that kill cells by apoptosis will lead to elimination of the differentiated tumor cells and the undifferentiated cancer stem cells leading to an elimination of the tumor and preventing recurrence.
    Type: Application
    Filed: February 8, 2013
    Publication date: January 8, 2015
    Inventors: Gilbert Arthur, Frank Schweizer, Pranati Samadder, Yaozu Xu
  • Patent number: 8153615
    Abstract: The syntheses and in vitro antitumor properties of carbamate-containing, dicarbamate-containing, and ureido-containing phospholipid compounds that have an ether linkage at the C-1 position of a glycerol backbone, a carbamate, dicarbamate, or ureido moiety at the C-2 position of the glycerol backbone, and a phosphocholine, phosphonocholine, or glycoside moiety at the C-3 position of the glycerol backbone are described. The synthesis and antiproliferative activity of ether lipids with a naphthol moiety at the C-1 position are also described. These compounds were shown to be potent inhibitors of cancer cell growth. These compounds are useful for killing cancer cells and treating cancer.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: April 10, 2012
    Inventors: Robert Bittman, Hoe-Sup Byun, Gilbert Arthur
  • Publication number: 20090042811
    Abstract: The syntheses and in vitro antitumor properties of carbamate-containing, dicarbamate-containing, and ureido-containing phospholipid compounds that have an ether linkage at the C-1 position of a glycerol backbone, a carbamate, dicarbamate, or ureido moiety at the C-2 position of the glycerol backbone, and a phosphocholine, phosphonocholine, or glycoside moiety at the C-3 position of the glycerol backbone are described. The synthesis and antiproliferative activity of ether lipids with a naphthol moiety at the C-1 position are also described. These compounds were shown to be potent inhibitors of cancer cell growth. These compounds are useful for killing cancer cells and treating cancer.
    Type: Application
    Filed: June 12, 2006
    Publication date: February 12, 2009
    Inventors: Robert Bittman, Hoe-Sup Byun, Gilbert Arthur
  • Patent number: 7323601
    Abstract: Unsaturated alkyllysophosphonocholines compounds of formula (I) or (II): or pharmaceutically-acceptable salts, prodrugs or isomers thereof. The compounds of the invention have anti-neoplastic activity, and accordingly have utility in treating cancer and related diseases. The invention also provides enantiomers of these compounds, as well as synthetic methods for producing an enantiomer, substantially free of the other enantiomer. Also disclosed are pharmaceutical compositions, as well methods for treating cancer with the pharmaceutical compositions.
    Type: Grant
    Filed: February 21, 2002
    Date of Patent: January 29, 2008
    Assignees: Research Foundation of the City University of New York, The University of Manitoba
    Inventors: Robert Bittman, Gilbert Arthur, Hoe-Sup Byun
  • Publication number: 20050014971
    Abstract: Unsaturated alkyllysophosphonocholines compounds of formula (I) or (II): or pharmaceutically-acceptable salts, prodrugs or isomers thereof. The compounds of the invention have anti-neoplastic activity, and accordingly have utility in treating cancer and related diseases. The invention also provides enantiomers of these compounds, as well as synthetic methods for producing an enantiomer, substantially free of the other enantiomer. Also disclosed are pharmaceutical compositions, as well methods for treating cancer with the pharmaceutical compositions.
    Type: Application
    Filed: February 21, 2002
    Publication date: January 20, 2005
    Inventors: Robert Bittman, Gilbert Arthur, Hoe-Sup Byun
  • Patent number: 6613748
    Abstract: A C-glucosyl ether lipid of the following formula: wherein R1 is a C12-C20 alkyl or C12-C20 alkenyl; R2 is a C1-C3 alkyl or C3 cycloalkyl; and X nitrogen-containing group.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: September 2, 2003
    Assignees: The Research Foundation of the City University of New York, The University of Manitoba
    Inventors: Robert Bittman, Gilbert Arthur, Richard W. Frank
  • Publication number: 20020128214
    Abstract: A C-glucosyl ether lipid of the following formula: 1
    Type: Application
    Filed: December 11, 2001
    Publication date: September 12, 2002
    Inventors: Robert Bittman, Gilbert Arthur, Richard W. Franck