Methods and compositions for treatment of tumors using nucleic acid ligands to platelet-derived growth factor

• US 7,141,375 B2
• Filed: 03/02/2004
• Issued: 11/28/2006
• Est. Priority Date: 06/07/1995
• Status: Expired due to Fees

• Current Assignee: Gilead Sciences Inc.
• Original Assignee: Gilead Sciences Inc.
• Inventors: Heldin, Carl-Henrik, Ostman, Arne, Pietras, Kristian, Rubin, Kristofer
• Primary Examiner(s): Zara, Jane
• Assistant Examiner(s): VIVLEMORE, TRACY ANN
• Application Number:
  US10/791,367
• Publication Number:
  US 20040224335A1
• Time in Patent Office: 1,001 Days
• Field of Search: None
• US Class Current: 435/6.11
• CPC Class Codes: A61K 38/00 Medicinal preparations containing peptides peptides containing beta-lactam rings A61K31/00; cyclic dipeptides not having in their molecule any other peptide link than those which form their ring, e.g. piperazine-2,5-diones, A61K31/00; ergot alkaloids of the cyclic peptide type A61K31/48; containing macromolecular compounds having statistically distributed amino acid units A61K31/74; medicinal preparations containing antigens or antibodies A61K39/00; medicinal preparations characterised by the non-active ingredients, e.g. peptides as drug carriers, A61K47/00
• CPC Class Codes: A61K 47/544 Phospholipids
• CPC Class Codes: A61K 47/547 Chelates, e.g. Gd-DOTA or Zinc-amino acid chelates; Chelate-forming compounds, e.g. DOTA or ethylenediamine being covalently linked or complexed to the pharmacologically- or therapeutically-active agent
• CPC Class Codes: A61K 47/549 Sugars, nucleosides, nucleotides or nucleic acids
• CPC Class Codes: A61K 47/60 the organic macromolecular compound being a polyoxyalkylene oligomer, polymer or dendrimer, e.g. PEG, PPG, PEO or polyglycerol
• CPC Class Codes: A61K 48/00 Medicinal preparations containing genetic material which is inserted into cells of the living body to treat genetic diseases; Gene therapy
• CPC Class Codes: B82Y 5/00 Nanobiotechnology or nanomedicine, e.g. protein engineering or drug delivery
• CPC Class Codes: C07H 19/06 Pyrimidine radicals
• CPC Class Codes: C07H 19/10 with the saccharide radical esterified by phosphoric or polyphosphoric acids
• CPC Class Codes: C07H 21/00 Compounds containing two or more mononucleotide units having separate phosphate or polyphosphate groups linked by saccharide radicals of nucleoside groups, e.g. nucleic acids
• CPC Class Codes: C07K 14/001 by chemical synthesis
• CPC Class Codes: C07K 14/47 from mammals
• CPC Class Codes: C07K 14/49 Platelet-derived growth factor [PDGF]
• CPC Class Codes: C07K 14/495 Transforming growth factor [TGF]
• CPC Class Codes: C07K 14/50 Fibroblast growth factor [FGF]
• CPC Class Codes: C07K 14/52 Cytokines; Lymphokines; Interferons
• CPC Class Codes: C12N 15/1048 SELEX
• CPC Class Codes: C12N 15/1136 against growth factors, growth regulators, cytokines, lymphokines or hormones
• CPC Class Codes: C12N 15/115 Aptamers, i.e. nucleic acids binding a target molecule specifically and with high affinity without hybridising therewith ; Nucleic acids binding to non-nucleic acids, e.g. aptamers
• CPC Class Codes: C12N 2310/13 Decoys
• CPC Class Codes: C12N 2310/317 : with an inverted bond, e.g. a cap structure
• CPC Class Codes: C12N 2310/3183 : Diol linkers, e.g. glycols or propanediols
• CPC Class Codes: C12N 2310/321 : 2'-O-R Modification
• CPC Class Codes: C12N 2310/322 : 2'-R Modification
• CPC Class Codes: C12N 2310/351 : Conjugate
• CPC Class Codes: C12N 2310/3515 : Lipophilic moiety, e.g. cholesterol
• CPC Class Codes: C12N 2310/3521 : Methyl
• CPC Class Codes: C12N 2310/53 : partially self-complementary or closed
• CPC Class Codes: C12N 9/1276 : RNA-directed DNA polymerase (2.7.7.49), i.e. reverse transcriptase or telomerase
• CPC Class Codes: C12Q 1/37 : involving peptidase or proteinase
• CPC Class Codes: C12Q 1/6811 : Selection methods for production or design of target specific oligonucleotides or binding molecules
• CPC Class Codes: C12Q 2525/101 : incorporating non-naturally occurring nucleotides, e.g. inosine
• CPC Class Codes: C12Q 2525/301 : Hairpin oligonucleotides
• CPC Class Codes: C12Q 2541/101 : Selex
• CPC Class Codes: C40B 40/00 : Libraries per se, e.g. arrays, mixtures
• CPC Class Codes: C40B 50/04 : using dynamic combinatorial chemistry techniques
• CPC Class Codes: F02B 2075/027 : four
• CPC Class Codes: G01N 2333/16 : HIV-1, HIV-2
• CPC Class Codes: G01N 2333/163 : Regulatory proteins, e.g. tat, nef, rev, vif, vpu, vpr, vpt, vpx
• CPC Class Codes: G01N 2333/503 : basic FGF [bFGF]
• CPC Class Codes: G01N 2333/575 : Hormones
• CPC Class Codes: G01N 2333/62 : Insulins
• CPC Class Codes: G01N 2333/8125 : Alpha-1-antitrypsin
• CPC Class Codes: G01N 2333/96433 : Serine endopeptidases (3.4.21)
• CPC Class Codes: G01N 2333/96436 : Granzymes
• CPC Class Codes: G01N 2333/96455 : Kallikrein (3.4.21.34; 3.4.21.35)
• CPC Class Codes: G01N 2333/96486 : Metalloendopeptidases (3.4.24)
• CPC Class Codes: G01N 2333/966 : Elastase
• CPC Class Codes: G01N 2333/9726 : Tissue plasminogen activator
• CPC Class Codes: G01N 2333/974 : Thrombin
• CPC Class Codes: G01N 2333/976 : Trypsin; Chymotrypsin
• CPC Class Codes: G01N 33/531 : Production of immunochemical test materials
• CPC Class Codes: G01N 33/532 : Production of labelled immunochemicals
• CPC Class Codes: G01N 33/535 : with enzyme label or co-enzymes, co-factors, enzyme inhibitors or enzyme substrates
• CPC Class Codes: G01N 33/56988 : HIV or HTLV
• CPC Class Codes: G01N 33/68 : involving proteins, peptides or amino acids involving lipoproteins G01N33/92
• CPC Class Codes: G01N 33/6842 : Proteomic analysis of subsets of protein mixtures with reduced complexity, e.g. membrane proteins, phosphoproteins, organelle proteins
• CPC Class Codes: G01N 33/76 : Human chorionic gonadotropin including luteinising hormone, follicle stimulating hormone, thyroid stimulating hormone or their receptors

Abstract

A method is provided for treating solid tumors comprising administering a composition comprising a PDGF aptamer and a cytotoxic agent. In a preferred embodiment the PDGF aptamer is identified using the SELEX process for the Systematic Evolution of Ligands by Exponential enrichment. A method is also provided for reducing the interstitial fluid pressure (IFP) of a solid tumor comprising administering a PDGF aptamer. Finally, a method is provided for increasing the uptake of cytotoxic agents into a tumor comprising administering a composition comprising a PDGF aptamer and a cytotoxic agent.

Claims

1. A method for treating tumors comprising:

a) pre-treating a host having a tumor by administering a therapeutically effective dose of a platelet-derived growth factor (PDGF) aptamer for a predetermined number of days; and

b) subsequently administering a therapeutically effective dose of a cytotoxic agent to said host.

2. The method of claim 1 wherein in step b) said cytotoxic agent is administered in combination with said PDGF aptamer.

3. The method of claim 1 wherein said PDGF aptamer is identified according to a method comprising:

a) preparing a candidate mixture of nucleic acids;

b) contacting the candidate mixture of nucleic acids with PDGF, wherein nucleic acids having an increased affinity to PDGF relative to the candidate mixture may be partitioned from the remainder of the candidate mixture;

c) partitioning the increased affinity nucleic acids from the remainder of the candidate mixture; and

d) amplifying the increased affinity nucleic acids to yield a mixture of nucleic acids enriched for nucleic acids with relatively higher affinity and specificity for binding to PDGF, whereby a nucleic acid ligand of PDGF may be identified.

4. The method of claim 1 wherein said PDGF aptamer is:

5. The method of claim 1 wherein said cytotoxic agent is selected from the group consisting of Bleomycin, Cisplatin, and Pt analogues;

Carboplatin and Iproplatin, Cyclophosphamide, Daunorubicin, Doxofluoridine, Doxorubicin, Etoposide, Epirubicin, 5-Flurouracil, Gemcitabine HCL, Ifosfamide, Melphalan, Methotrexate, Mithramycin, Mitomycin C, Mitoxanthrone, Streptozotocin, paclitaxel and docetaxel, Vincristine, Vinblastine, Vindesine, Vinorelbine, Topotecan and CPT-11.

6. A method for increasing the uptake of cytotoxic agents into a tumor comprising:

a) pre-treating a host having a tumor by administering a therapeutically effective dose of a platelet-derived growth factor (PDGF) aptamer for a predetermined number of days; and

b) subsequently administering a therapeutically effective dose of a cytotoxic agent to said host.

7. The method of claim 6 wherein in step b) said cytotoxic agent is administered in combination with said PDGF aptamer.

8. The method of claim 6 wherein said PDGF aptamer is identified according to a method comprising:

a) preparing a candidate mixture of nucleic acids;

b) contacting the candidate mixture of nucleic acids with PDGF, wherein nucleic acids having an increased affinity to PDGF relative to the candidate mixture may be partitioned from the remainder of the candidate mixture;

c) partitioning the increased affinity nucleic acids from the remainder of the candidate mixture; and

d) amplifying the increased affinity nucleic acids to yield a mixture of nucleic acids enriched for nucleic acids with relatively higher affinity and specificity for binding to PDGF, whereby a nucleic acid ligand of PDGF may be identified.

9. The method of claim 6 wherein said PDGF aptamer is:

10. The method of claim 6 wherein said cytotoxic agent is selected from the group consisting of Bleomycin, Cisplatin, and Pt analogues;

Carboplatin and Iproplatin, Cyclophosphamide, Daunorubicin, Doxofluoridine, Doxorubicin, Etoposide, Epirubicin, 5-Flurouracil, Gemcitabine HCL, Ifosfamide, Melphalan, Methotrexate, Mithramycin, Mitomycin C, Mitoxanthrone, Streptozotocin, paclitaxel and docetaxel, Vincristine, Vinblastine, Vindesine, Vinorelbine, Topotecan and CPT-11.