USOO7427605B2 (12) United States Patent (10) Patent No.: US 7.427,605 B2 Davis et al. (45) Date of Patent: Sep. 23, 2008 (54) INHIBITORS OF RIBONUCLEOTIDE 6,030,942 A 2/2000 Cooperman et al. REDUCTASE SUBUNIT 2 AND USES 7,056,704 B2 * 6/2006 Tuschl et al. ............... 435,911 THEREOF 7,098,030 B2 * 8/2006 Rozema et al. ............... 514,44 (75) Inventors: Mark E. Davis, Pasadena, CA (US); FOREIGN PATENT DOCUMENTS Jeremy D. Heidel, Pasadena, CA (US); WO WOO2,24864 3, 2002 John J. Rossi, Altaloma, CA (US) OTHER PUBLICATIONS (73) Assignee: Calando Pharmaceuticals, Inc., Cerqueria et al., 2005. Overview of ribonucleotide reductase inhibi Pasadena, CA (US) tors: an appealing target in anti-tumour therapy, Curr. Med. Chem. 12:1283. (*) Notice: Subject to any disclaimer, the term of this R.E.E. Aug 12, 2002, XPO024007222, database accession O. past lis listed under 35 Duxbury et al., 2004. Retrovirally mediated RNA interference tar M YW- y yS. geting the M2 Subunit of ribonucleotide reductase: A novel therapeu tic strategy in pancreatic cancer, Surgery 136:261-269. (21) Appl. No.: 11/396,365 Duxbury et al., 2004, RNA interference targeting the M2 subunit of ribonucleotide reductase enhances pancreatic adenocarcinoma (22) Filed: Mar. 31, 2006 chemosensitivity to gemcitabine. Oncogene 28:1539-1548. Kim et al., 2002, Database EMBL, XPO02407223, Database acces (65) Prior Publication Data Sion No. BM754277. Kittler et al., 2004. An endoribonuclease-prepared siRNA screen in US 2006/0263.435A1 Nov. 23, 2006 human cells identifies genes essential for cell division, Nature O O 432:1036-1040. Related U.S. Application Data Lin et al., 2004, Stable suppression of the R2 subunit of (60) Provisional application No. 60/742,100, filed on Dec. SILIZespoissils 5(-- t - O COOby CaCtheE. CSO -damaging RNA agentS N. Royal Epist SEs5. and ribonucleotide reductase inhibitors, J. Biol. Chem. 279:27030. • - ws p pp s Zhou et al., 2003, The human ribonucleotide reductase subunit 362, filed on Mar. 31, 2005. hRRM2 complements p53R2 in response to UV-induced DNA repair (51) Int. Cl in cells with mutant p53, Cancer Res. 63.6583-6594. A6 IK3I/70 (2006.01) * cited by examiner 6, A. 3.08: Primary Examiner Richard Schnizer (52) U.S. Cl 51444. 536/24.5: 514/58 (74) Attorney, Agent, or Firm Ropes & Gray LLP (58) Field of Classification Search ....................... None (57) ABSTRACT See application file for complete search history. The present application relates to inhibitors of ribonucleotide (56) References Cited reductase subunit 2 (R2), and methods and compositions U.S. PATENT DOCUMENTS related to the R2 inhibitors. In certain embodiments, the R2 inhibitors include nucleic acids, such as for example siRNAs. 4,945,195 A 7/1990 Ipcinski 5.998,383 A * 12/1999 Wright et al. ................. 514,44 14 Claims, 45 Drawing Sheets U.S. Patent Sep. 23, 2008 Sheet 1 of 45 US 7.427,605 B2 5 CCCAGGCGCAGCCAATGGGAAGGGTCGGAGGCATGGCACAGCCAATGGGAAGGGCCGGGGCACCAAAGCC AATGGGAAGGGCCGGGAGCGCGCGGCGCGGGAGATTTAAAGGCTGCTGGAGTGAGGGGTCGCCCGTGCAC CCTGTCCCAGCCGTCCTGTCCTGGCTGCTCGCTCTGCTTCGCTGCGCCTCCACTATGCTCTCCCTCCGTG TCCCGCTCGCGCCCATCACGGACCCGCAGCAGCTGCAGCTCTCGCCGCTGAAGGGGCTCAGCTTGGTCGA CAAGGAGAACACGCCGCCGGCCCTGAGCGGGACCCGCGTCCTGGCCAGCAAGACCGCGAGGAGGATCTTC CAGGAGCCCACGGAGCCGAAAACTAAAGCAGCTGCCCCCGGCGTGGAGGATGAGCCGCTGCTGAGAGAAA ACCCCCGCCGCTTTGTCATCTTCCCCATCGAGTACCATGATATCTGGCAGATGTATAAGAAGGCAGAGGC TTCCTTTTGGACCGCCGAGGAGGTTGACCTCTCCAAGGACATTCAGCACTGGGAATCCCTGAAACCCGAG GAGAGATATTTTATATCCCATGTTCTGGCTTTCTTTGCAGCAAGCGATGGCATAGTAAATGAAAACTTGG TGGAGCGATTTAGCCAAGAAGTTCAGATTACAGAAGCCCGCTGTTTCTATGGCTCCAAATTGCCATGGA AAACATACATTCTGAAATGTATAGTCTTCTTATTGACACTTACATAAAAGATCCCAAAGAAAGGGAATTT CTCTTCAATGCCATTGAAACGATGCCTTGTGTCAAGAAGAAGGCAGACTGGGCCTTGCGCTGGATTGGGG ACAAAGAGGCTACCTATGGTGAACGTGTTGTAGCCTTTGCTGCAGTGGAAGGCATTTTCTTTTCCGGTTC TTTTGCGTCGATATTCTGGCTCAAGAAACGAGGACTGATGCCTGGCCTCACATTTTCTAATGAACTTATT AGCAGAGATGAGGGTTTACACTGTGATTTTGCTTGCCTGATGTTCAAACACCTGGTACACAAACCATCGG AGGAGAGAGTAAGAGAAATAATTATCAATGCTGTTCGGATAGAACAGGAGTTCCTCACTGAGGCCTTGCC TGTGAAGCTCATTGGGATGAATTGCACTCTAATGAAGCAATACATTGAGTTTGTGGCAGACAGACTTATG CTGGAACTGGGTTTTAGCAAGGTTTTCAGAGTAGAGAACCCATTTGACTTTATGGAGAATATTTCACTGG AAGGAAAGACTAACTTCTTGAGAAGAGAGTAGGCGAGTATCAGAGGATGGGAGTGATGTCAAGTCCAAC AGAGAATTCTTTTACCTTGGATGCTGACTTCTAAATGAACTGAAGATGTGCCCTTACTTGGCTGATTTTT TTTTTCCATCTCATAAGAAAAATCAGCTGAAGTGTTACCAACTAGCCACACCATGAATTGTCCGTAATGT TCATTAACAGCATCTTTAAAACTGTGTAGCTACCTCACAACCAGTCCTGTCTGTTTATAGTGCTGGTAGT ATCACCTTTTGCCAGAAGGCCTGGCTGGCTGTGACTTACCATAGCAGTGACAATGGCAGTCTTGGCTTTA AAGTGAGGGGTGACCCTTTAGTGAGCTTAGCACAGCGGGATTAAACAGTCCTTTAACCAGCACAGCCAGT TAAAAGATGCAGCCTCACTGCTTCAACGCAGATTTTAATGTTTACTTAAATATAAACCTGGCACTTTACA AACAAATAAACATTGTTTTGTACTCACGGCGGCGATAATAGCTTGATTTATTTGGTTTCTACACCAAATA CATTCTCCTGACCACTAATGGGAGCCAATTCACAATTCACTAAGTGACTAAAGTAAGTTAAACTTGTGTA GACTAAGCATGTAATTTTTAAGTTTTATTTTAATGAATTAAAATATTTGTTAACCAACTTTAAAGTCAGT CCTGTGTATACCTAGATATTAGTCAGTTGGTGCCAGATAGAAGACAGGTTGTGTTTTTATCCTGTGGCTT GTGTAGTGTCCTGGGATTCTCTGCCCCCTCTGAGTAGAGTGTTGTGGGATAAAGGAATCTCTCAGGGCAA GGAGCTTCTTAAGTTAAATCACTAGAAATTTAGGGGTGATCTGGGCCTTCATATGTGTGAGAAGCCGTTT CATTTTATTTCTCACTGTATTTTCCTCAACGTCTGGTTGATGAGAAAAAATTCTTGAAGAGTTTTCATAT GTGGGAGCTAAGGTAGTATTGTAAAATTTCAAGTCATCCTTAAACAAAATGATCCACCTAAGATCTTGCC CCTGTTAAGTGGTGAAATCAACTAGAGGTGGTTCCTACAAGTTGTTCATTCTAGTTTTGTTTGGTGTAAG TAGGTTGTGTGAGTTAATTCATTTATATTTACTATGTCTGTTAAATCAGAAATTTTTTATTATCTATGTT CTTCTAGATTTTACCTGTAGTTCATAAAAAAAAAAAAAAAAAAAAAAAAA 3 FIGURE 1 U.S. Patent Sep. 23, 2008 Sheet 3 of 45 US 7.427,605 B2 U.S. Patent Sep. 23, 2008 Sheet 4 of 45 US 7.427,605 B2 009Z_||_ #7GTRIQOIH ||| ZÅX |O{E\/ U.S. Patent Sep. 23, 2008 Sheet 5 of 45 US 7.427,605 B2 SGIRI[10][H U.S. Patent US 7.427,605 B2 L(HIRIQ?IH U.S. Patent Sep. 23, 2008 Sheet 8 of 45 US 7.427,605 B2 dqZG7/ 8CHIRIQ?INH U.S. Patent Sep. 23, 2008 Sheet 9 of 45 US 7.427,605 B2 R |||||||||||||| |,}! | 6(HRIQOIH U.S. Patent Sep. 23, 2008 Sheet 10 of 45 US 7.427,605 B2 0ICHRIQOIH 00|| 08 09 uo ort adjo', U.S. Patent Sep. 23, 2008 Sheet 11 of 45 US 7.427,605 B2 Facing Olga NH2 ca fuored (9 1S R Se2 O Emma- 99ewdits O CD E. --- g s 2 fluooned g was CD 9. 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(eele/S/ud) Suolil US 7,427,605 B2 1. 2 INHIBITORS OF RIBONUCLEOTDE than 250, no more than 100 or no more than 50 nucleotides of REDUCTASE SUBUNIT 2 AND USES the target gene nucleic acid sequence Such as any of those THEREOF designated by SEQ ID NOs: 1-3 (FIGS. 1-2), or any homologs (e.g., orthologs and paralogs) or variants thereof. RELATED APPLICATIONS The region of complementarity will preferably be at least 8 nucleotides, and optionally at least 10, 15, 20, 21, 22, 23, 24. This application claims the benefit of U.S. Provisional 25, 26, 27, 28, 29, or 30 nucleotides.