Enhancement of antibacterial activity of β-lactam antibiotics by [P2W18O62]6-, [SiMo12O40]4-, and [PTi2W10O40]7- against methicillin-resistant and vancomycin-resistant Staphylococcus aureus

Miyao Inoue, Tomoko Suzuki, Yutaka Fujita, Mayumi Oda, Nobuhiro Matsumoto, Toshihiro Yamase

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

The enhancement of antibacterial activity of β-lactam antibiotics by polyoxometalates against methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant S. aureus (VRSA) was investigated by using K6[P2W18O62] · 14H2O (P2W18), K4[SiMo12O40] · 3H2O (SiMo12), and K7[PTi2W10O40] · 6H2O (PTi2W10). Susceptibility test by a β-lactam-disk method showed the synergistic effect of the polyoxometalates in combination with oxacillin against both MRSA and VRSA. Energy dispersive X-ray analysis of the strain treated with P2W18 revealed localization of the polyoxometalate-tungsten atoms at the periphery of the cell, and the biological reduction of P2W18 and SiMo12 proceeded within both cells of MRSA and VRSA as far as they keep alive. These results indicate that the polyoxometalates can penetrate through the cell wall consisting of peptidoglycan layers and reach cytoplasmic membrane. The inhibitory effect of the polyoxometalates on both mecA- and pbp-induced mRNA expression of both MRSA and VRSA cells, verified by the RT-PCR-electrophoresis analysis, is observed, and the mechanism of the synergistic effect by the polyoxometalates is discussed in terms of the depression of penicillin-binding protein 2′ (PBP2′) coded by mecA gene.

Original languageEnglish
Pages (from-to)1225-1233
Number of pages9
JournalJournal of Inorganic Biochemistry
Volume100
Issue number7
DOIs
Publication statusPublished - 2006 Jul
Externally publishedYes

Fingerprint

Lactams
Methicillin Resistance
Methicillin
Vancomycin
Methicillin-Resistant Staphylococcus aureus
Staphylococcus aureus
Anti-Bacterial Agents
Penicillin-Binding Proteins
Oxacillin
Tungsten
Peptidoglycan
Energy dispersive X ray analysis
Electrophoresis
Cell Wall
Genes
Cells
Cell Membrane
X-Rays
Membranes
Polymerase Chain Reaction

Keywords

  • Expression inhibition
  • Methicillin-resistant Staphylococcus aureus
  • Polyoxometalates
  • Transcription
  • Vancomycin-resistant Staphylococcus aureus

ASJC Scopus subject areas

  • Biochemistry
  • Inorganic Chemistry

Cite this

Enhancement of antibacterial activity of β-lactam antibiotics by [P2W18O62]6-, [SiMo12O40]4-, and [PTi2W10O40]7- against methicillin-resistant and vancomycin-resistant Staphylococcus aureus. / Inoue, Miyao; Suzuki, Tomoko; Fujita, Yutaka; Oda, Mayumi; Matsumoto, Nobuhiro; Yamase, Toshihiro.

In: Journal of Inorganic Biochemistry, Vol. 100, No. 7, 07.2006, p. 1225-1233.

Research output: Contribution to journalArticle

Inoue, Miyao ; Suzuki, Tomoko ; Fujita, Yutaka ; Oda, Mayumi ; Matsumoto, Nobuhiro ; Yamase, Toshihiro. / Enhancement of antibacterial activity of β-lactam antibiotics by [P2W18O62]6-, [SiMo12O40]4-, and [PTi2W10O40]7- against methicillin-resistant and vancomycin-resistant Staphylococcus aureus. In: Journal of Inorganic Biochemistry. 2006 ; Vol. 100, No. 7. pp. 1225-1233.
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AU - Inoue, Miyao

AU - Suzuki, Tomoko

AU - Fujita, Yutaka

AU - Oda, Mayumi

AU - Matsumoto, Nobuhiro

AU - Yamase, Toshihiro

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N2 - The enhancement of antibacterial activity of β-lactam antibiotics by polyoxometalates against methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant S. aureus (VRSA) was investigated by using K6[P2W18O62] · 14H2O (P2W18), K4[SiMo12O40] · 3H2O (SiMo12), and K7[PTi2W10O40] · 6H2O (PTi2W10). Susceptibility test by a β-lactam-disk method showed the synergistic effect of the polyoxometalates in combination with oxacillin against both MRSA and VRSA. Energy dispersive X-ray analysis of the strain treated with P2W18 revealed localization of the polyoxometalate-tungsten atoms at the periphery of the cell, and the biological reduction of P2W18 and SiMo12 proceeded within both cells of MRSA and VRSA as far as they keep alive. These results indicate that the polyoxometalates can penetrate through the cell wall consisting of peptidoglycan layers and reach cytoplasmic membrane. The inhibitory effect of the polyoxometalates on both mecA- and pbp-induced mRNA expression of both MRSA and VRSA cells, verified by the RT-PCR-electrophoresis analysis, is observed, and the mechanism of the synergistic effect by the polyoxometalates is discussed in terms of the depression of penicillin-binding protein 2′ (PBP2′) coded by mecA gene.

AB - The enhancement of antibacterial activity of β-lactam antibiotics by polyoxometalates against methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant S. aureus (VRSA) was investigated by using K6[P2W18O62] · 14H2O (P2W18), K4[SiMo12O40] · 3H2O (SiMo12), and K7[PTi2W10O40] · 6H2O (PTi2W10). Susceptibility test by a β-lactam-disk method showed the synergistic effect of the polyoxometalates in combination with oxacillin against both MRSA and VRSA. Energy dispersive X-ray analysis of the strain treated with P2W18 revealed localization of the polyoxometalate-tungsten atoms at the periphery of the cell, and the biological reduction of P2W18 and SiMo12 proceeded within both cells of MRSA and VRSA as far as they keep alive. These results indicate that the polyoxometalates can penetrate through the cell wall consisting of peptidoglycan layers and reach cytoplasmic membrane. The inhibitory effect of the polyoxometalates on both mecA- and pbp-induced mRNA expression of both MRSA and VRSA cells, verified by the RT-PCR-electrophoresis analysis, is observed, and the mechanism of the synergistic effect by the polyoxometalates is discussed in terms of the depression of penicillin-binding protein 2′ (PBP2′) coded by mecA gene.

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KW - Transcription

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