Florfenicol metabolite

在韩国鲶鱼（Silurus asotus）中静脉注射（i.v.）和口服（p.o.）20mg/kg体重后，研究了氟苯尼考及其代谢产物氟苯尼考胺的药代动力学。静脉注射氟苯尼考（单次）后，终末半衰期（t（1/2））、稳态分布体积（v（dss））和全身清除率分别为11.12+/-1.06 h、1.09+/-0.09 L/kg和0.07+/-0.01 L x kg/h。口服氟苯尼考后，t（1/2）、C（max）、t（max）和口服生物利用度（F）分别为15.69+/-2.59h、9.59+/-0.36mg/mL、8h和92.61+/-10.1%。氟苯尼考胺是氟苯尼科的一种活性代谢产物，在所有鱼类中都检测到。静脉注射和口服氟苯尼考后，观察到的氟苯尼考胺的C（max）值（3.91+/-0.69和3.57+/-0.65mg/L）分别在0.5和7.33+/-1.15小时达到。静脉注射和腹腔注射氟苯尼科胺后的平均代谢率分别为0.4和0.5[1]。

[1]. Pharmacokinetics of florfenicol and its metabolite, florfenicol amine, in the Korean catfish (Silurus asotus). J Vet Pharmacol Ther. 2006 Feb;29(1):37-40.

[2]. Plasma and tissue depletion of florfenicol and florfenicol-amine in chickens. J Agric Food Chem. 2008 Nov 26;56(22):11049-56.

Chickens were used to investigate plasma disposition of florfenicol after single intravenous (i.v.) and oral dose (20 mg kg-1 body weight) and to study residue depletion of florfenicol and its major metabolite florfenicol-amine after multiple oral doses (40 mg kg-1 body weight, daily for 3 days). Plasma and tissue samples were analyzed using a high-performance liquid chromatography (HPLC) method. After i.v. and oral administration, plasma concentration-time curves were best described by a two-compartment open model. The mean [ +/- standard deviation (SD)] elimination half-life (t1/2beta) of florfenicol in plasma was 7.90 +/- 0.48 and 8.34 +/- 0.64 h after i.v. and oral administration, respectively. The maximum plasma concentration was 10.23 +/- 1.67 microg mL-1, and the interval from oral administration until maximal concentration was 0.63 +/- 0.07 h. Oral bioavailability was found to be 87 +/- 16%. Florfenicol was converted to florfenicol-amine. After multiple oral dose (40 mg kg-1 body weight, daily for 3 days), in kidney and liver, concentrations of florfenicol (119.34 +/- 31.81 and 817.34 +/- 91.65 microg kg-1, respectively) and florfenicol-amine (60.67 +/- 13.05 and 48.50 +/- 13.07 microg kg-1, respectively) persisted for 7 days. The prolonged presence of residues of florfenicol and florfenicol-amine in edible tissues can play an important role in human food safety, because the compounds could give rise to a possible health risk. A withdrawal time of 6 days was necessary to ensure that the residues of florfenicol were less than the maximal residue limits or tolerance established by the European Union.[2]

C10H15CLFNO3S

283.75

283.045

108656-33-3

Florfenicol amine;76639-93-5

19422964

White to off-white solid powder

162-164ºC

3.003

88.77

3

5

4

17

307

0

Cl.FC[C@H]([C@@H](C1C=CC(S(=O)(C)=O)=CC=1)O)N

HWPBPTAOXVIKGI-UHFFFAOYSA-N

InChI=1S/C10H14FNO3S.ClH/c1-16(14,15)8-4-2-7(3-5-8)10(13)9(12)6-11;/h2-5,9-10,13H,6,12H2,1H3;1H

2-amino-3-fluoro-1-(4-methylsulfonylphenyl)propan-1-ol;hydrochloride

Florfenicol Amine Hydrochloride; 108656-33-3; 2-amino-3-fluoro-1-(4-methylsulfonylphenyl)propan-1-ol;hydrochloride; FLORFENICOL AMINE, HYDROCHLORIDE; Flufenicol impurities 3; SCHEMBL9177460; HWPBPTAOXVIKGI-UHFFFAOYSA-N;

2934.99.9001

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

注意： 请将本产品存放在密封且受保护的环境中，避免吸湿/受潮。

Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

DMSO : 125 mg/mL (440.53 mM)

配方 1 中的溶解度: ≥ 2.08 mg/mL (7.33 mM) (饱和度未知) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (这些助溶剂从左到右依次添加，逐一添加), 澄清溶液。
例如，若需制备1 mL的工作液，可将100 μL 20.8 mg/mL澄清DMSO储备液加入400 μL PEG300中，混匀；然后向上述溶液中加入50 μL Tween-80，混匀；加入450 μL生理盐水定容至1 mL。
*生理盐水的制备：将 0.9 g 氯化钠溶解在 100 mL ddH₂O中，得到澄清溶液。

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配方 2 中的溶解度: ≥ 2.08 mg/mL (7.33 mM) (饱和度未知) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (这些助溶剂从左到右依次添加，逐一添加), 澄清溶液。
例如，若需制备1 mL的工作液，可将 100 μL 20.8 mg/mL澄清DMSO储备液加入900 μL 20% SBE-β-CD生理盐水溶液中，混匀。
*20% SBE-β-CD 生理盐水溶液的制备（4°C，1 周）：将 2 g SBE-β-CD 溶解于 10 mL 生理盐水中，得到澄清溶液。

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配方 3 中的溶解度: ≥ 2.08 mg/mL (7.33 mM) (饱和度未知) in 10% DMSO + 90% Corn Oil (这些助溶剂从左到右依次添加，逐一添加), 澄清溶液。
例如，若需制备1 mL的工作液，可将 100 μL 20.8 mg/mL 澄清 DMSO 储备液加入到 900 μL 玉米油中并混合均匀。

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请根据您的实验动物和给药方式选择适当的溶解配方/方案：
1、请先配制澄清的储备液(如：用DMSO配置50 或 100 mg/mL母液(储备液));
2、取适量母液，按从左到右的顺序依次添加助溶剂，澄清后再加入下一助溶剂。以 下列配方为例说明 (注意此配方只用于说明，并不一定代表此产品 的实际溶解配方):
10% DMSO → 40% PEG300 → 5% Tween-80 → 45% ddH2O (或 saline);
假设最终工作液的体积为 1 mL, 浓度为5 mg/mL: 取 100 μL 50 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中，混合均匀/澄清；向上述体系中加入50 μL Tween-80，混合均匀/澄清；然后继续加入450 μL ddH2O (或 saline)定容至 1 mL；
3、溶剂前显示的百分比是指该溶剂在最终溶液/工作液中的体积所占比例;
4、 如产品在配制过程中出现沉淀/析出，可通过加热(≤50℃)或超声的方式助溶;
5、为保证最佳实验结果，工作液请现配现用！
6、如不确定怎么将母液配置成体内动物实验的工作液，请查看说明书或联系我们;
7、 以上所有助溶剂都可在 Invivochem.cn网站购买。