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Kuwabara N, Hayashi H, Hiramatsu N, Choshi T, Kumemura T, Nobuhiro J, Hibino S. Syntheses of the antibiotic alkaloids renierone, mimocin, renierol, renierol acetate, renierol propionate, and 7-methoxy-1,6-dimethylisoquinoline-5,8-dione. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.02.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Pettit RK, Fakoury BR, Knight JC, Weber CA, Pettit GR, Cage GD, Pon S. Antibacterial activity of the marine sponge constituent cribrostatin 6. J Med Microbiol 2004; 53:61-65. [PMID: 14663107 DOI: 10.1099/jmm.0.05250-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The antibacterial activity of the nitrogen heterocyclic sponge constituent cribrostatin 6 was examined. Cribrostatin 6 was bacteriostatic for a variety of Gram-positive species and was bactericidal for the majority of clinical isolates of Streptococcus pneumoniae, including penicillin-resistant strains. Minimum bactericidal concentration/MIC ratios were < or =2 for 75 % of S. pneumoniae clinical isolates. Kill-curve analysis confirmed the bactericidal action of cribrostatin 6. Bactericidal activity was rather slow, beginning at 2, 4 or 8 h, depending on the strain. The frequency of occurrence of bacterial spontaneous mutations to resistance was < or =10(-7). The maximum tolerated dose of cribrostatin 6 in mice was 750-1000 micro g kg(-1) day(-1). Cribrostatin 6 is a promising lead antibiotic for Gram-positive bacteria, particularly S. pneumoniae, a leading cause of infection and mortality worldwide.
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Affiliation(s)
- Robin K Pettit
- Cancer Research Institute1 and Departments of Microbiology2 and Chemistry and Biochemistry3, Arizona State University, Tempe, AZ 85287-2404, USA 4Microbiology Lab, Phoenix Children's Hospital, Phoenix, AZ 85016, USA
| | - Bridget R Fakoury
- Cancer Research Institute1 and Departments of Microbiology2 and Chemistry and Biochemistry3, Arizona State University, Tempe, AZ 85287-2404, USA 4Microbiology Lab, Phoenix Children's Hospital, Phoenix, AZ 85016, USA
| | - John C Knight
- Cancer Research Institute1 and Departments of Microbiology2 and Chemistry and Biochemistry3, Arizona State University, Tempe, AZ 85287-2404, USA 4Microbiology Lab, Phoenix Children's Hospital, Phoenix, AZ 85016, USA
| | - Christine A Weber
- Cancer Research Institute1 and Departments of Microbiology2 and Chemistry and Biochemistry3, Arizona State University, Tempe, AZ 85287-2404, USA 4Microbiology Lab, Phoenix Children's Hospital, Phoenix, AZ 85016, USA
| | - George R Pettit
- Cancer Research Institute1 and Departments of Microbiology2 and Chemistry and Biochemistry3, Arizona State University, Tempe, AZ 85287-2404, USA 4Microbiology Lab, Phoenix Children's Hospital, Phoenix, AZ 85016, USA
| | - Gary D Cage
- Cancer Research Institute1 and Departments of Microbiology2 and Chemistry and Biochemistry3, Arizona State University, Tempe, AZ 85287-2404, USA 4Microbiology Lab, Phoenix Children's Hospital, Phoenix, AZ 85016, USA
| | - Sandy Pon
- Cancer Research Institute1 and Departments of Microbiology2 and Chemistry and Biochemistry3, Arizona State University, Tempe, AZ 85287-2404, USA 4Microbiology Lab, Phoenix Children's Hospital, Phoenix, AZ 85016, USA
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Nakahara S, Kubo A. Synthesis of Mimosamycin and 5,8-Dihydroxy-4,7-dimethoxy- 2,6-dimethylisoquinolinium Iodide. HETEROCYCLES 2004. [DOI: 10.3987/com-04-10126] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Nakahara S, Kubo A. Catalytic Hydrogenation of 8-Acyloxy-1-cyanoisoquinoline and Synthesis of 9-Methoxy-9-deethoxycribrostatin 6. HETEROCYCLES 2003. [DOI: 10.3987/com-03-9894] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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