Fosfomycin calcium (Phosphomycin calcium salt)
(Synonyms: 磷霉素钙; MK-?0955 calcium) 目录号 : GC32143
A broad-spectrum antibiotic
Cas No.:26016-98-8
Sample solution is provided at 25 µL, 10mM.
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Quality Control & SDS
- View current batch:
- Purity: >98.00%
- COA (Certificate Of Analysis)
- SDS (Safety Data Sheet)
- Datasheet
Fosfomycin is a broad-spectrum bactericidal antibiotic.1,2 It is active against Salmonella and P. aeruginosa at 1.56 and 6.25 ?g/ml, respectively, as well as methicillin-sensitive S. aureus (MSSA), cephalosporin- and penicillin-resistant S. pneumoniae, methicillin-resistant S. aureus (MRSA), and vancomycin-resistant Enterococcus. Formulations containing fosfomycin have been used in the treatment of urinary tract infections.
1.Goto, S.Fosfomycin, antimicrobial activity in vitro and in vivoChemotherapy23(Suppl. 1)63-74(1977) 2.Michalopoulos, A.S., Livaditis, I.G., and Gougoutas, V.The revival of fosfomycinInt. J. Infect. Dis.15(11)e732-e739(2011)
| Cas No. | 26016-98-8 | SDF | |
| 别名 | 磷霉素钙; MK-?0955 calcium | ||
| Canonical SMILES | C[C@H]1[C@@H](P([O-])([O-])=O)O1.[Ca+2] | ||
| 分子式 | C3H5CaO4P | 分子量 | 176.12 |
| 溶解度 | Water : 3.33 mg/mL (18.91 mM) | 储存条件 | Store at 2-8°C |
| General tips | 请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液；一旦配成溶液，请分装保存，避免反复冻融造成的产品失效。 储备液的保存方式和期限：-80°C 储存时，请在 6 个月内使用，-20°C 储存时，请在 1 个月内使用。 为了提高溶解度，请将管子加热至37℃，然后在超声波浴中震荡一段时间。 |
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| Shipping Condition | 评估样品解决方案：配备蓝冰进行发货。所有其他可用尺寸：配备RT，或根据请求配备蓝冰。 | ||
| 制备储备液 | |||
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1 mg | 5 mg | 10 mg |
| 1 mM | 5.6779 mL | 28.3897 mL | 56.7795 mL |
| 5 mM | 1.1356 mL | 5.6779 mL | 11.3559 mL |
| 10 mM | 0.5678 mL | 2.839 mL | 5.6779 mL |
| 第一步：请输入基本实验信息（考虑到实验过程中的损耗，建议多配一只动物的药量） | ||||||||||
| 给药剂量 | mg/kg |  |
动物平均体重 | g | |
每只动物给药体积 | ul | |
动物数量 | 只 |
| 第二步：请输入动物体内配方组成（配方适用于不溶于水的药物；不同批次药物配方比例不同，请联系GLPBIO为您提供正确的澄清溶液配方） | ||||||||||
| % DMSO % % Tween 80 % saline | ||||||||||
| 计算重置 | ||||||||||
计算结果:
工作液浓度： mg/ml；
DMSO母液配制方法： mg 药物溶于 μL DMSO溶液（母液浓度 mg/mL，
体内配方配制方法：取 μL DMSO母液，加入 μL PEG300，混匀澄清后加入μL Tween 80，混匀澄清后加入 μL saline，混匀澄清。
1. 首先保证母液是澄清的；
2.
一定要按照顺序依次将溶剂加入，进行下一步操作之前必须保证上一步操作得到的是澄清的溶液，可采用涡旋、超声或水浴加热等物理方法助溶。
3. 以上所有助溶剂都可在 GlpBio 网站选购。
The revival of fosfomycin
Int J Infect Dis 2011 Nov;15(11):e732-9.PMID:21945848DOI:10.1016/j.ijid.2011.07.007.
Fosfomycin, originally named phosphonomycin, was discovered in Spain in 1969. There are three forms of fosfomycin: fosfomycin tromethamine (a soluble salt) and Fosfomycin calcium for oral use, and fosfomycin disodium for intravenous use. Fosfomycin is a bactericidal antibiotic that interferes with cell wall synthesis in both Gram-positive and Gram-negative bacteria by inhibiting the initial step involving phosphoenolpyruvate synthetase. It has a broad spectrum of activity against a wide range of Gram-positive and Gram-negative bacteria. It is highly active against Gram-positive pathogens such as Staphylococcus aureus and Enterococcus, and against Gram-negative bacteria such as Pseudomonas aeruginosa and Klebsiella pneumoniae. Its unique mechanism of action may provide a synergistic effect to other classes of antibiotics including beta-lactams, aminoglycosides, and fluoroquinolones. Oral fosfomycin is mainly used in the treatment of urinary tract infections, particularly those caused by Escherichia coli and Enterococcus faecalis. Intravenous fosfomycin has been administered in combination with other antibiotics for the treatment of nosocomial infections due to multidrug-resistant (MDR) Gram-positive and Gram-negative bacteria. Fosfomycin has good distribution into tissues, achieving clinically relevant concentrations in serum, kidneys, bladder wall, prostate, lungs, inflamed tissues, bone, cerebrospinal fluid, abscess fluid, and heart valves. Fosfomycin is well tolerated, with a low incidence of adverse events. Further randomized controlled trials are needed in order to evaluate the efficacy of intravenous fosfomycin for the management of nosocomial infections due to MDR pathogens.
[Experimental studies on absorption, distribution and excretion of a new antibiotic, fosfomycin. II. Absorption of oral preparations of Fosfomycin calcium salt in dogs (author's transl)]
Jpn J Antibiot 1975 Jun;28(3):314-9.PMID:1152285doi
To establish the best usage and dosage of fosfomycin granule and capsules which had been prepared based on our fundamental experiences as described in the first report, absorption of calcium salt contained in both preparations was evaluated using dogs as test animals. (1) Granule containing the calcium salt equivalent to 200 mg of fosfomycin free acid per g showed almost the same absorption as the bulk (Fosfomycin calcium), having no disadvantage due to processing. (2) Capsules containing the calcium salt equivalent to 250 mg and 500 mg of the free acid per capsule showed slightly more retarded absorption than the bulk, probably due to some inevitable factors such as disintegration rate of capsules and dispersion rate of the calcium salt. But, once dispersed, the calcium salt in capsules was well absorbed as well as the bulk material. (3) Gastrointestinal absorption of granule and the capsule contents was almost the same. (4) Simultaneous administration of capsules and water improved the absorption efficiency. Though administration after feeding caused somewhat retarded absorption of the drug, the serum levels were rather well sustained with a slight drop but sufficiency of absorption, suggesting better clinical advantages than in the fasted animals. (5) Fosfomycin calcium salt in both preparations was well absorbed in the test animals through gastrointestinal tract as well as the bulk calcium salt, without any possible disadvantage caused by processing. In addition, the absorption efficiency was improved by giving with water or meal to the animals.
[Experimental studies on absorption, distribution and excretion of fosfomycin. I. Absorption distribution and excretion of Fosfomycin calcium salt (author's transl)]
Jpn J Antibiot 1975 Jun;28(3):309-13.PMID:1152284doi
In order to develop some oral drug preparations containing calcium salt of fosfomycin ((minus)-cis-1,2-epoxypropylphosphonic acid) which is a new antibiotic, the absorption, distribution and excretion were studied when it was administered orally to fasted test animals such as rats, rabbits and dogs. The results are as follows: 1) In the case of rats, the more dose size was increased, the more ratio of excretion in urine as index of gastrointestinal absorption was reduced and ratio of excretion in stools was adversely increased, which suggested a decrease in absorption efficiency. But, as absolute amount of excretion in urine became larger with dose size, it was considered that increase in dose size would serve for elevation of serum levels. 2) When the calcium salt was given to rats and rabbits in form of solution and suspension, the former was more eminent than the latter regarding to absorption efficiency, as generally known. The solution, however, needed relatively large quantity of water to solubilize the calcium salt, and it was not considered that the absorption efficiency depends on only dissolution step or dissolution rate. 3) Difference of the particle size varying from 1.50 mu(bulk particle size) and 0.64 mu(mechanical limit size) measured by Kozeny-Carman method did not affect on the absorption in rats and dogs. So it was considered that the bulk could be use directly without micronizing in manufacturing process for the oral preparations. 4) There were some differences of absorption among the animal species. Good absorption was shown in turn in rats, dogs and rabbits. These differences might depend not only on physiological factors but also anatomical differences such as length of gastrointestinal tract. 5) In rabbits high concentration was observed successively in kidney, lung, heart and so on. In any organ its level decreased similarly to the serum level, not sustaining its initial high concentration. The calcium salt did not possess any affinity to certain organs. 6) In conclusion, though some differences of gastrointestinal absorption were observed among the animal species, Fosfomycin calcium salt was well absorbed without problem of micronizing the bulk particles. Moreover, it was perceived that Fosfomycin calcium salt, once distributed, would not remain in particular organs, being excreted out of body.
Pharmacokinetic comparison between fosfomycin and other phosphonic acid derivatives
Chemotherapy 1990;36 Suppl 1:10-8.PMID:2085981DOI:10.1159/000238809.
The pharmacokinetic comparison of phosphonic acid derivatives is based upon a survey of available literature on the whole group of compounds and on our own studies on fosfomycin. All three clinically used compounds, fosfomycin, fosmidomycin, and alafosfalin, are available for both oral and parenteral administration. The highest bioavailability is observed for the trometamol derivative of fosfomycin (37-44%); the calcium salt of fosfomycin is 2-2.5 times less absorbed and fosmidomycin has a bioavailability of 20-30%. The peak serum concentration of fosfomycin when given as the trometamol salt is about 2 times higher than the one reached with Fosfomycin calcium or fosmidomycin. Urine recovery of unchanged drug is comparable after intravenous doses of fosfomycin and fosmidomycin, 80-95%, whereas the figure is only 10-20% for alafosfalin because it is extensively metabolized. After oral administration, urine recovery is highest for fosfomycin trometamol, 35-60%, compared to approximately 25% (range 18-29%) for Fosfomycin calcium, 26% for fosmidomycin, and 6-17% for alafosfalin. The serum half-life of fosfomycin is 2-4 h (higher, up to 5.5 h, for some formulations of the calcium salt), 1.5-2.0 h for fosmidomycin, and about 1 h for alafosfalin. Thus, among available phosphonic acid derivatives and formulations, the trometamol derivative of fosfomycin has the most favourable characteristics. This applies to both bioavailability and urinary recovery, while at the same time the medium long half-life renders moderate fluctuation of concentrations whereby longer dosage intervals are possible.(ABSTRACT TRUNCATED AT 250 WORDS)