Flurbiprofen(FB),a nonsteroidal anti-inflammatory drug,is widely employed in treating ocular inflammation owing to its remarkable anti-inflammatory effects.However,the racemic nature of its commercially available form...Flurbiprofen(FB),a nonsteroidal anti-inflammatory drug,is widely employed in treating ocular inflammation owing to its remarkable anti-inflammatory effects.However,the racemic nature of its commercially available formulation(Ocufen^(R))limits the full potential of its therapeutic activity,as the(S)-enantiomer is responsible for the desired antiinflammatory effects.Additionally,the limited corneal permeability of FB significantly restricts its bioavailability.In this study,we successfully separated the chiral isomers of FB to obtain the highly active(S)-FB.Subsequently,utilizing ion-pairing technology,we coupled(S)-FB with various counter-ions,such as sodium,diethylamine,trimethamine(TMA),and l-arginine,to enhance its ocular bioavailability.A comprehensive evaluation encompassed balanced solubility,octanol-water partition coefficient,corneal permeability,ocular pharmacokinetics,tissue distribution,and in vivo ocular anti-inflammatory activity of each chiral isomer salt.Among the various formulations,S-FBTMA exhibited superior water solubility(about 1–12 mg/ml),lipid solubility(1<lgP_(ow)<3)and corneal permeability.In comparison to Ocufen^(R),S-FBTMA demonstrated significantly higher in vivo antiinflammatory activity and lower ocular irritability(such as conjunctival congestion and tingling).The findings from this research highlight the potential of chiral separation and ion-pair enhanced permeation techniques in providing pharmaceutical enterprises focused on drug development with a valuable avenue for improving therapeutic outcomes.展开更多
目的建立以高效液相色谱-蒸发光散射检测器(HPLC-ELSD)法测定依托红霉素片含量的方法。方法大曹三耀(OSAKA SODA GROUP)CAPCELL PAK C_(18) MGⅡS5色谱柱,0.03%二乙胺-乙腈(30∶70,V/V)为流动相,流速为0.9 mL·min^(-1),进样量10μL...目的建立以高效液相色谱-蒸发光散射检测器(HPLC-ELSD)法测定依托红霉素片含量的方法。方法大曹三耀(OSAKA SODA GROUP)CAPCELL PAK C_(18) MGⅡS5色谱柱,0.03%二乙胺-乙腈(30∶70,V/V)为流动相,流速为0.9 mL·min^(-1),进样量10μL,柱温40℃。ELSD参数:漂移管温度45℃,载气流速3.3 L·min^(-1),增益为6。结果依托红霉素在0.209~1.257 mg·mL^(-1)的浓度范围内线性关系良好(r=0.9991);精密度、稳定性、重复性试验的RSD<1.5%;加标回收率平均值为99.6%;定量限为0.209μg,检测限为0.067μg。结论该方法操作简单、准确灵敏、稳定性好,可用于依托红霉素片的含量测定。展开更多
建立了HPLC-ELSD法测定磷霉素钠中磷霉素及有关物质的含量。采用ODS柱,柱温35℃,以0.015m o l/L正辛胺溶液(用冰乙酸调节pH至5.2)∶乙腈(90∶10)为流动相,蒸发光散射检测器温度为45℃,雾化气体压力为0.35M Pa。磷霉素及其二醇物分别在2...建立了HPLC-ELSD法测定磷霉素钠中磷霉素及有关物质的含量。采用ODS柱,柱温35℃,以0.015m o l/L正辛胺溶液(用冰乙酸调节pH至5.2)∶乙腈(90∶10)为流动相,蒸发光散射检测器温度为45℃,雾化气体压力为0.35M Pa。磷霉素及其二醇物分别在26.0～207.7和7.6～60.6μg/m l范围内呈良好的线性关系,两者的定量限分别为8.7和7.7μg/m l。展开更多
目的：建立HPLC-ELSD法同时测定黄芪及金芪降糖片中黄芪甲苷、黄芪皂苷Ⅰ、黄芪皂苷Ⅱ、黄芪皂苷Ⅲ、异黄芪皂苷Ⅱ5种成分的含量。方法：色谱柱为Grace Apollo C18（250 mm×4.6 mm,5μm）;流动相为乙腈（A）-水（B）,梯度洗脱;体...目的：建立HPLC-ELSD法同时测定黄芪及金芪降糖片中黄芪甲苷、黄芪皂苷Ⅰ、黄芪皂苷Ⅱ、黄芪皂苷Ⅲ、异黄芪皂苷Ⅱ5种成分的含量。方法：色谱柱为Grace Apollo C18（250 mm×4.6 mm,5μm）;流动相为乙腈（A）-水（B）,梯度洗脱;体积流量：1.0 m L/min。结果：5种皂苷类成分线性关系良好,加样回收率在95%~105%。运用该方法测定了12批黄芪药材和10批金芪降糖片中5种皂苷类成分的含量。结论：该实验建立的方法专属性强,灵敏度高,简便易行,可用于同时测定黄芪及金芪降糖片中5种皂苷类成分的含量。展开更多
基金financially supported by the National Postdoctoral Foundation of China(No.2023M730375)Liaoning Province Department of Education Project(No.LJKMZ20221365)the State Key Laboratory of Natural and Biomimetic Drugs(No.K202215)。
文摘Flurbiprofen(FB),a nonsteroidal anti-inflammatory drug,is widely employed in treating ocular inflammation owing to its remarkable anti-inflammatory effects.However,the racemic nature of its commercially available formulation(Ocufen^(R))limits the full potential of its therapeutic activity,as the(S)-enantiomer is responsible for the desired antiinflammatory effects.Additionally,the limited corneal permeability of FB significantly restricts its bioavailability.In this study,we successfully separated the chiral isomers of FB to obtain the highly active(S)-FB.Subsequently,utilizing ion-pairing technology,we coupled(S)-FB with various counter-ions,such as sodium,diethylamine,trimethamine(TMA),and l-arginine,to enhance its ocular bioavailability.A comprehensive evaluation encompassed balanced solubility,octanol-water partition coefficient,corneal permeability,ocular pharmacokinetics,tissue distribution,and in vivo ocular anti-inflammatory activity of each chiral isomer salt.Among the various formulations,S-FBTMA exhibited superior water solubility(about 1–12 mg/ml),lipid solubility(1<lgP_(ow)<3)and corneal permeability.In comparison to Ocufen^(R),S-FBTMA demonstrated significantly higher in vivo antiinflammatory activity and lower ocular irritability(such as conjunctival congestion and tingling).The findings from this research highlight the potential of chiral separation and ion-pair enhanced permeation techniques in providing pharmaceutical enterprises focused on drug development with a valuable avenue for improving therapeutic outcomes.
文摘目的建立以高效液相色谱-蒸发光散射检测器(HPLC-ELSD)法测定依托红霉素片含量的方法。方法大曹三耀(OSAKA SODA GROUP)CAPCELL PAK C_(18) MGⅡS5色谱柱,0.03%二乙胺-乙腈(30∶70,V/V)为流动相,流速为0.9 mL·min^(-1),进样量10μL,柱温40℃。ELSD参数:漂移管温度45℃,载气流速3.3 L·min^(-1),增益为6。结果依托红霉素在0.209~1.257 mg·mL^(-1)的浓度范围内线性关系良好(r=0.9991);精密度、稳定性、重复性试验的RSD<1.5%;加标回收率平均值为99.6%;定量限为0.209μg,检测限为0.067μg。结论该方法操作简单、准确灵敏、稳定性好,可用于依托红霉素片的含量测定。
文摘目的：建立HPLC-ELSD法同时测定黄芪及金芪降糖片中黄芪甲苷、黄芪皂苷Ⅰ、黄芪皂苷Ⅱ、黄芪皂苷Ⅲ、异黄芪皂苷Ⅱ5种成分的含量。方法：色谱柱为Grace Apollo C18（250 mm×4.6 mm,5μm）;流动相为乙腈（A）-水（B）,梯度洗脱;体积流量：1.0 m L/min。结果：5种皂苷类成分线性关系良好,加样回收率在95%~105%。运用该方法测定了12批黄芪药材和10批金芪降糖片中5种皂苷类成分的含量。结论：该实验建立的方法专属性强,灵敏度高,简便易行,可用于同时测定黄芪及金芪降糖片中5种皂苷类成分的含量。
