Table 3.
Overview of cell wall disruptors tested against intracellular S. aureus
Antibiotic Class | Antibiotic | Bone: plasma ratio | Bone concentration | Intra- to extracellular ratio | MIC at ca pH5 (μg·mL−1 or mg·L−1) | MIC at ca pH7 (μg·mL−1 or mg·L−1) | Intracellular effectivity against S. aureus | Model tested | ||
---|---|---|---|---|---|---|---|---|---|---|
bone cell | Other cells | In vivo | ||||||||
Beta-lactam antibiotics | Oxacillin |
0.1107 0.1140 0.1753 |
4 μg·mL−1 41 10 μg·mL−1 53 |
4.074 |
<0.015–0.062 543 0.0674 0.016 MSSA, 0.023 MRSA153 |
0.125 SCV & 0.5 WT17 0.09453 <0.015–0.062 543 0.12574 0.25 MSSA, > 256 MRSA153 |
SCV 1-log, more effective against the WT17 4-log (dose depending), SCV emergence reduction53 2-log, time depending74 <1-log153 |
MG6353,153 | THP-117,74 | |
Cefatroline | 0.1953 | 4 μg·mL−1 53 | 0.006 MSSA, 0.008 MRSA153 |
0.1953 0.125 MSSA, 0.25 MRSA153 |
2-log, SCV induction53 <1-log, similar MRSA/MSSA153 |
MG6353,153 | ||||
Cefuroxime | 0.04–0.5540 | <1-log immediately, no effect after 7d55 | pHOBs55 | C57BL/6 mice55 | ||||||
Cefazolin |
0.75–0.37107 0.1840 |
3–30 μg·g−1 107 4.2 μg·mL−1 41 |
0.03–0.12543 | 0.062 50–0.543 | No effect58,141 |
UMR10658 MC3T3141 |
||||
Flucloxacillin | 89.5 μg·mL−1 41 | <1-log immediately, no effect after 7d55 | pHOBs55 | |||||||
Ampicillin |
0.17–0.33107 0.11–0.7140 |
12–20 μg·g−1 107 | 1.074 |
0.03150 0.0374 |
0.0674 0.07150 |
1-log74 No effect (1 h)141 1-log, time depending less dose depending150 |
MC3T3141 | THP-174,150 | ||
Dicloxacillin | 3.8 μg·mL−1 41 | ns (ca log1) decrease of bacteria, but can be increased by adding efflux inhibitors (piperine or cyanide m-chlorophenyl hydrazone)152 | Saos-2152 | |||||||
Nafcillin | 2.674 | 0.0674 | 0.2574 | 1-log74 | THP-174 | |||||
Penicillin V | 1.274 | <0.01574 | 0.0674 | 1-log74 | THP-174 | |||||
Penicillin G | <0.1-log157 | A594157 | ||||||||
Ertapenem | 0.13–0.1940 | 0.06150 | 0.11150 | 1-log, time depending less dose depending150 | THP-1150 | |||||
Meropenem | 0.06150 | 0.15150 | 1-log, time depending less dose depending150 | THP-1150 | ||||||
Glycopeptides | Vancomycin |
0.05–0.21107 0.05–0.9740 0.2153 |
1.1–3.6 μg·mL−1 107 3.8–4.5 μg·mL−1 41 6 μg·mL−1 53 |
6.374 |
1 SCV & 0.5 WT125 0.125–143 174 |
0.5 SCV & WT17 1.553 1 SCV & 0.5 WT125 0.25–243 174 231 |
SCV, in beginning growth, max 1-log, WT much more effective17 Max 1-log31,125,144,152,166 immediately & after 7d55 1-log dose and time dependent74 Ns bacterial growth53 2-log163 |
pHOBs55 MC3T3141 Saos-2152 |
A594166 J774162 |
Sprague-Dawley rats31 Kunming mice166 |
Oritavancin | 27–65 μg·mL−1 41 |
14874 336–34475 (highest by far) |
0.125 SCV & 0.25–1 WT125 |
0.015 SCV & 0.03 WT17 0.0774 0.2575 0.03–0.06125 |
3-log against SCV (best drug of 13)17 3-log strongly time & dose dependent74 4-log dose depending125 3.5-log all phenotypes75 |
J77475 |
||||
Teicoplanin |
0.5–0.8540 0.2153 |
3 μg·mL−1 53 | 7.474 |
0.0625–243 174 |
0.25–0.543 1.553 174 |
3-4-log53 <1-log74 |
MG6353 | THP-174 | ||
Telavancin | 0.125 all phenotypes17 | <1-log SCV, WT better17 | THP-117 | |||||||
Fosfomycin |
0.25107 0.13–0.4540 0.3553 |
16-96 μg·g−1 107 4 μg·mL−1 53 |
1–1643 |
253 0.25–843 |
3-log no dose depending53 Immediately effective not after 7d55 |
MG6353 pHOBs55 |
||||
Lipopeptides | Daptomycin |
0.07107 0.2453 |
5 μg·g−1 107 5 μg·mL−1 53 |
0.5 SCV & WT125 0.75 MSSA, 0.19 MRSA153 443 |
0.125 SCV & WT17 0.1953 0.5–2 WT, 0.25–0.5 SCV125 0.064 MSSA, 0.19 MRSA153 1–243 |
SCV 1-log, WT better17 2-log125 <1-log immediately, after 7d ns55 <1-log178 |
pHOBs55 |
THP-117,125 | C57BL/6 mice178 |