Patents Assigned to QLT, Inc.
  • Publication number: 20070060551
    Abstract: Methods of using substituted 3,5-dithio-, disulfinyl-or disulfonyl-isothiazole derivatives to treat cancer or inflammation in a mammal and pharmaceutical compositions containing such derivatives are disclosed.
    Type: Application
    Filed: June 11, 2003
    Publication date: March 15, 2007
    Applicant: QLT, Inc.
    Inventors: Zaihui Zhang, Timothy Daynard, Gabriel Kalmar
  • Publication number: 20060281798
    Abstract: Methods of using thiazolidinedithione derivatives to treat cancer, neurodegenerative disease, diabetes, renal disease or inflammation in a mammal and pharmaceutical compositions containing such derivatives are disclosed.
    Type: Application
    Filed: May 16, 2003
    Publication date: December 14, 2006
    Applicant: QLT Inc.
    Inventors: Zaihui Zhang, Timothy Daynard, Gabriel Kalmar, Jun Yan, David Charest
  • Publication number: 20060265028
    Abstract: It has been discovered that photodynamic therapy (PDT) can stimulate an increase in hair count numbers and restore hair growth in areas of hair loss. A method according to the present invention comprises: a) administering an effective and/or sufficient amount of a photosensitizer to the target skin; b) irradiating the target skin with energy comprising one or more wavelength capable of activating said photosensitizer for a time period sufficient to activate the photosensitizer, wherein there is an increase in hair count numbers in the treated area. In one aspect of the present invention, there is a 2% or more increase in the number of terminal hairs within 3 months.
    Type: Application
    Filed: April 23, 2003
    Publication date: November 23, 2006
    Applicant: QLT INC.
    Inventors: Jean-Marie Houle, David Hunt
  • Patent number: 7135193
    Abstract: Liposomal pharmaceutical formulations incorporating porphyrin photosensitizers useful for photodynamic therapy or diagnosis of malignant cells. The liposomal formulations comprise a porphyrin photosensitizer, particularly the hydro-mono benzoporphyrins (BPD) having light absorption maxima in the range of 670–780 nanometers, a disaccharide or polysaccharide and one or more phospholipids.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: November 14, 2006
    Assignee: QLT, Inc.
    Inventors: Narendra R. Desai, Bushra J. Agha, Kalidas Madhavrao Kale, James R. Lawter
  • Publication number: 20060247210
    Abstract: Pharmaceutical pyrazolybenzothiazole compositions of formula (1) are provided. The compositions may be pharmaceutically acceptable salts. R1, R2 and R3 at each occurrence are independently selected from amino, aminosulfinyl, aminosulfonyl, aryl, azido, halogen, heteroalkyl, heteroaryl, hydrazinyl, hydrocarbyl, hydrogen, hydroxyl, nitro, nitroso, phosphate, phosphinate, phosphonate, phosphonium, phosphorothioate, phosphoryl, sulfamoyl, sulfate, sulfinic acid, sulfonamido, sulfonate, sulfonic acid, sulfonyl, sulfoxido, thiol, thioureido, and ureido, and R4 is selected from hydrogen, heteroalkyl, heteroaryl, and hydrocarbyl.
    Type: Application
    Filed: July 23, 2003
    Publication date: November 2, 2006
    Applicant: QLT INC.
    Inventors: Zaihui Zhang, Timothy Daynard, Shisen Wang, Xinyao Du, Gregory Chopiuk, Jun Yan, Jianxin Chen, Serguei Sviridov
  • Publication number: 20060235061
    Abstract: Methods of using benzothiophenone derivatives to treat cancer or inflammation in a mammal and pharmaceutical compositions containing such derivatives are disclosed.
    Type: Application
    Filed: June 18, 2003
    Publication date: October 19, 2006
    Applicant: QLT,Inc.
    Inventors: Zaihui Zhang, Timothy Daynard, Gabriel Kalmar
  • Patent number: 7122568
    Abstract: The present invention relates to the use of low-dose photodynamic therapy (PDT) to prevent, treat, inhibit or reduce restenosis in blood vessels. The present invention may be used in combination with any angioplastic procedure to prevent restenosis or to decrease the intima thickness, and thus luminal narrowing.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: October 17, 2006
    Assignee: QLT, Inc.
    Inventors: Beth Anne Allison, Philippe Maria Clotaire Margaron, Valery Rubinchik, Russell G. Hodge, Michael David Leslie Stonefield
  • Patent number: 7122569
    Abstract: New compounds useful in photodynamic therapy are of the formula and their 1,4-diene isomers and the metallated and/or labeled and/or conjugated forms thereof wherein each R1 is independently alkyl (1–6C); each n is independently an integer of 0–6; and R2 is vinyl or a derivative form thereof.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: October 17, 2006
    Assignees: QLT, Inc. and, University of British Columbia
    Inventors: Ethan D. Sternberg, David Dolphin, Julia G. Levy, Anna M. Richter, David W. C. Hunt, Ashok Jain, Elizabeth M. Waterfield, Ronald E. Boch, Andrew Norman Tovey
  • Patent number: 7105503
    Abstract: Pharmaceutical compositions and compounds are provided. The compounds of the invention demonstrate anti-proliferative activity, and may promote apoptosis in cells lacking normal regulation of cell cycle and death. In one embodiment of the invention, pharmaceutical compositions of the compounds in combination with a physiologically acceptable carrier are provided. The pharmaceutical compositions are useful in the treatment of hyperproliferative disorders, which disorders include tumor growth, lymphoproliferative diseases, angiogenesis. The compounds of the invention are substituted pyrazoles and pyrazolines.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: September 12, 2006
    Assignee: QLT Inc.
    Inventors: Zaihui Zhang, Timothy S. Daynard, Serguei V. Sviridov, Mikhail A. Chafeev, Shisen Wang
  • Patent number: 7090691
    Abstract: Photodynamic therapy (PDT) is used to stimulate and/or restore hair growth in areas of hair loss. Methods and compositions relating to PDT treatment for alopecia are disclosed. In light of PDT use to remove unwanted hair by inactivating or destroying hair follicles or destroying the tissue feeding the hair follicles, such methods and compositions relate to a surprising and unexpected discovery. PDT permits a means to treat conditions relating to hair loss such as androgenic alopecia, alopecia areata and drug-induced alopecia.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: August 15, 2006
    Assignee: QLT Inc.
    Inventors: Guillermo O. Simkin, Anna M. Richter, David W. C. Hunt, John Robert North, Peter Lutwyche, Ronald Erwin Boch
  • Patent number: 7060695
    Abstract: An improved method to treat conditions of the eye characterized by ocular neovascularization is provided in which patients are given and initial photodynamic therapy (PDT) treatment to destroy the neovasculature, and then are re-evaluated at least twice during the following 6 months, and retreated as necessary. Preferably, three retreatments are provided.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: June 13, 2006
    Assignees: QLT, Inc., Novartis AG
    Inventors: H. Andrew Strong, Mohammad Azab, Troy Albert Reaves, Jr.
  • Patent number: 7022702
    Abstract: Pharmaceutical compositions and compounds are provided. The compounds of the invention have anti-proliferative activity, and may promote apoptosis in cells lacking normal regulation of cell cycle and death. In one embodiment of the invention, formulations of the compounds in combination with a physiologically acceptable carrier are provided. The pharmaceutical formulations are useful in the treatment of hyperproliferative disorders, which disorders include tumor growth, lymphoproliferative diseases, angiogenesis.
    Type: Grant
    Filed: May 10, 2002
    Date of Patent: April 4, 2006
    Assignee: QLT Inc.
    Inventors: Zaihui Zhang, Gregory B. Chopiuk, Timothy S. Daynard, Shisen Wang
  • Patent number: 7015240
    Abstract: The invention relates to the use of photodynamic therapy (PDT) to treat macular edemas, including DME, CRVO and BRVO. It provides an alternative to photocoagulation and the disadvantages associated therewith.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: March 21, 2006
    Assignee: QLT, Inc.
    Inventors: Janice North, Peter Hnik, H. Andrew Strong
  • Publication number: 20060009500
    Abstract: This invention is directed to methods of using compounds having the structure: and including stereoisomers, solvates, and pharmaceutically acceptable salts thereof, wherein each of R1, R2, R3 and R4 is independently selected from hydrogen, R5, R6, and R7; R5 is selected from alkyl, heteroalkyl, aryl and heteroaryl; R6 is selected from (R5)n-alkylene, (R5)n-heteroalkylene, (R5)n-arylene and (R5)n-heteroarylene; R7 is selected from (R6)n-alkylene, (R6)n-heteroalkylene, (R6)n-arylene, and (R6)n-heteroarylene; and n is selected from 0, 1, 2, 3, 4 and 5, where R1 and R2 may together form a heterocyclic structure including the nitrogen to which they are both attached, and R3 and R4 may together form a heterocyclic structure including the nitrogen to which they are both attached; and each of L1 and L2 is independently selected from -A1-A2-A3- where each of A1, A2, and A3 is independently selected from a direct bond, alkylene, heteroalkylene, arylene and heteroarylene.
    Type: Application
    Filed: September 2, 2005
    Publication date: January 12, 2006
    Applicant: QLT Inc.
    Inventors: Zalhui Zhang, Gregory Chopiuk, Timothy Daynard, Shisen Wang
  • Patent number: 6984395
    Abstract: Compositions comprising microaggregates containing hydrophobic drugs, as well as methods for their production, are described. Such microaggregates may include micelle structures or combinations thereof with liposomes, and constitute an effective delivery vehicle for a hydrophobic agent. Methods for microaggregate production include the use of preferred lipid compounds and processing conditions favoring the production of small aggregates for improved filter sterilization.
    Type: Grant
    Filed: April 11, 2001
    Date of Patent: January 10, 2006
    Assignee: QLT, Inc.
    Inventors: Ronald Erwin Boch, Dev Mitra Ranji Singh, Iman Karmadi
  • Publication number: 20050123543
    Abstract: The invention relates to the treatment of renal diseases using modulators of integrin linked kinase. Methods of treatment as well as therapeutic agents including antisense, small molecules, catalytic peptides and antibodies are disclosed. The agents of the invention may also be used in combination with traditional therapies for renal disease including ACE inhibitors. An advantage of the invention is that it treats one of the causes of renal disease, rather than just ameliorating symptoms, and can help prevent the progression of renal disease to the point of acute renal failure.
    Type: Application
    Filed: November 26, 2002
    Publication date: June 9, 2005
    Applicant: QLT Inc.
    Inventors: Matthias Kretzler, Patricia Logan
  • Patent number: 6890555
    Abstract: Liposomal pharmaceutical formulations incorporating porphyrin photosensitizers useful for photodynamic therapy or diagnosis of malignant cells. The liposomal formulations comprise a porphyrin photosensitizer, particularly the hydro-mono benzoporphyrine (BPD) having light absorption maxima in the range of 670-780 nanometers, a disaccharide or polysaccharide and one or more phospholipids.
    Type: Grant
    Filed: June 8, 2000
    Date of Patent: May 10, 2005
    Assignee: QLT, Inc.
    Inventors: Narendra Raghunathji Desai, Bushra J. Agha, Kalidas Madhavrao Kale, James R. Lawter
  • Patent number: 6849058
    Abstract: Multiple sclerosis and rheumatoid arthritis can be treated effectively using photodynamic therapy. In this protocol, a photoactive compound is administered, allowed to distribute in the effected subject, and the subject is then irradiated to activate the photoactive compound. Alternatively, the blood of a subject to be treated can be subjected to PDT extracorporeally. In the case of rheumatoid arthritis, localized treatment at the joints may also be employed.
    Type: Grant
    Filed: May 31, 2000
    Date of Patent: February 1, 2005
    Assignee: QLT, Inc.
    Inventors: Julia G. Levy, Janice North
  • Patent number: 6830925
    Abstract: Methods for isolating CaMK-X1 genes are provided. The CaMK-X1nucleic acid compositions find use in identifying homologous or related proteins and the DNA sequences encoding such proteins; in producing compositions that modulate the expression or function of the protein; and in studying associated physiological pathways. In addition, modulation of the gene activity in vivo is used for prophylactic and therapeutic purposes, such as identification of cell type based on expression, and the like.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: December 14, 2004
    Assignee: QLT Inc.
    Inventors: Thillainathan Yoganathan, Allen Delaney
  • Patent number: 6800086
    Abstract: The invention relates to the use of reduced fluence rate PDT to treat neovasculature, particularly choroidal neovasculature (CNV). Reduced fluence rate PDT decreases the likelihood of molecular oxygen being the limiting factor in the photodynamic reaction so that the concentration of either photons (light intensity) or photosensitizer in the target tissue controls the photodynamic reaction.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: October 5, 2004
    Assignee: QLT Inc.
    Inventor: H. Andrew Strong