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Linezolid

现货
Catalog No.
A5181
抗菌剂
组合的产品项目
规格价格库存 数量
10mM (in 1mL DMSO)
¥ 600.00
现货
10mg
¥ 580.00
现货
25mg
¥ 1,050.00
现货
100mg
¥ 2,850.00
现货

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Background

Linezolid, a synthetic oxazolidinone antimicrobial, shows a wide spectrum against Gram-positive bacteria andmultidrug-resistant bacteria such as anaerobes, methicillin-resistant Staphylococcus aureus (MRSA), vancomycin-resistant enterococci, penicillin-resistant pneumococci and streptococcus [1,2].

Oxazolidinones could inhibit protein synthesis by binding to a site on the bacterial 23S ribosomal RNA of the 50S subunit and prevent the formation of a functional 70S-initiation complex. Linezolid is also a weak, nonselective and reversible inhibitor of monoamine oxidase [2].

In Vitro: Linezolid was a potent inhibitor of cell-free transcription-translation in E. coli. IC50 was 1.8 mM[3]. linezolid MICs vary slightly owing to the different test method and laboratory. The MIC values were between 0.5 and 4 mg/L for streptococci, enterococci and staphylococci [4].

Clinical Trials: Linezolid is fully bioavailable following oral administration, with maximum plasma linezolid concentrations achieved between 1 and 2 hours after oral administration. The elimination half-life of linezolid is 5–7 hours, and twice-daily administration of 400–600mg provides steady-state concentrations in the therapeutic range[5].

In clinical trials involving hospitalised patients with skin/soft tissue infections (predominantly S. aureus), intravenous/oral administration of linezolid (up to 1250 mg/day) produced clinical success in > 83% of individuals. In patients with community-acquired pneumonia, success rates were > 94%[6]. Linezolid could also be used in patients with nosocomial pneumonia[7].Linezolid appears to be well tolerated and the most common side effects is gastrointestinal disturbances [6].

References:
[1] Tsiodras S, Gold H S, Sakoulas G, et al.  Linezolid resistance in a clinical isolate of Staphylococcus aureus[J]. The Lancet, 2001, 358(9277): 207-208.
[2] Swaney S M, Aoki H, Ganoza M C, et al.  The oxazolidinone linezolid inhibits initiation of protein synthesis in bacteria[J]. Antimicrobial agents and chemotherapy, 1998, 42(12): 3251-3255.
[3] Shinabarger D L, Marotti K R, Murray R W, et al.  Mechanism of action of oxazolidinones: effects of linezolid and eperezolid on translation reactions[J]. Antimicrobial agents and chemotherapy, 1997, 41(10): 2132-2136.
[4] Livermore D M.  Linezolid in vitro: mechanism and antibacterial spectrum[J]. Journal of antimicrobial chemotherapy, 2003, 51(suppl 2): ii9-ii16.
[5] Stalker D J, Jungbluth G L.  Clinical pharmacokinetics of linezolid, a novel oxazolidinoneantibacterial[J]. Clinical pharmacokinetics, 2003, 42(13): 1129-1140.
[6] Clemett D, Markham A.  Linezolid[J]. Drugs, 2000, 59(4): 815-827.
[7] Wunderink R G, Cammarata S K, Oliphant T H, et al.  Continuation of a randomized, double-blind, multicenter study of linezolid versus vancomycin in the treatment of patients with nosocomial pneumonia[J]. Clinical therapeutics, 2003, 25(3): 980-992.

Chemical Properties

Physical AppearanceA solid
StorageStore at -20°C
M.Wt337.35
Cas No.165800-03-3
FormulaC16H20FN3O4
Solubility≥16.85mg/mL in DMSO, ≥9.5 mg/mL in EtOH with ultrasonic, ≥2.48 mg/mL in H2O with ultrasonic and warming
Chemical NameN-[[(5S)-3-(3-fluoro-4-morpholin-4-ylphenyl)-2-oxo-1,3-oxazolidin-5-yl]methyl]acetamide
SDFDownload SDF
Canonical SMILESCC(=O)NCC1CN(C(=O)O1)C2=CC(=C(C=C2)N3CCOCC3)F
运输条件试用装:蓝冰运输。 其他可选规格:常温运输或根据您的要求用蓝冰运输。
一般建议为了使其更好的溶解,请用37℃加热试管并在超声波水浴中震动片刻。不同厂家不同批次产品溶解度各有差异,仅做参考。若实验所需浓度过大至产品溶解极限,请添加助溶剂助溶或自行调整浓度。

试验操作

抗菌实验 [1]:

细菌

大肠杆菌UC6782

制备方法

在DMSO中的溶解度大于16.9 mg/mL。若配制更高浓度的溶液,一般步骤如下:请将试管置于37 °C加热10分钟和/或将其置于超声波浴中震荡一段时间。原液于-20 °C可放置数月。

反应条件

0.01 ~ 1000 μM;60分钟

实验结果

Linezolid有效抑制大肠杆菌UC6782蛋白合成,其IC90值为30 μM。Linezolid比DuP-721的作用至少高2.5倍。Linezolid比链霉素的作用强约2倍。

References:

[1]. Shinabarger D L, Marotti K R, Murray R W, et al. Mechanism of action of oxazolidinones: effects of linezolid and eperezolid on translation reactions[J]. Antimicrobial agents and chemotherapy, 1997, 41(10): 2132-2136.

质量控制

化学结构

Linezolid