Li T.,Guangzhou University |
Zhang L.,Guangzhou University |
Tong L.,Tianjin Tasly Group Co. |
Liao Q.,Guangzhou University
Baicalin is the main indicator for qualitative and quantitative analysis of Scutellaria baicalensis Georgi and its prescription in vivo and in vitro. Owing to its insolubility and instability, the analysis of baicalin in biological samples is analytically challenging. Although there have been many pharmacokinetic or metabolism studies on baicalin, the current reported sample pretreatment methods are not the optimal choice with regard to absolute recovery and operation procedure. Here we report a high-throughput salting-out-assisted homogeneous liquid-liquid extraction method with acetonitrile and ammonium sulfate. Eight kinds of commonly used salts, preferred salt concentration and auxiliary solvents were investigated. The extraction efficiency in the presence of ammonium salt and auxiliary solvent (methanol) in comparison to that from the salt-free aqueous increased to above 90%. The performance of the developed pretreatment method was further evaluated through testing specificity, linearity, precision, accuracy, extraction recovery and stability. In particular, the stability investigation results proved that the operation at low temperature would no longer necessary be for salting-out-assisted homogeneous liquid-liquid extraction compared with protein precipitation, and the pretreatment method would be valuable if the compounds were unstable within matrices. © 2013 John Wiley & Sons, Ltd. Source
Tianjin Tasly Group Co. | Date: 2013-10-21
The present invention relates to the field of medical technology. More specifically, the present invention relates to a preparation of taxanes for intravenous administration, which consists of two parts: a drug solution and an emulsion. Said drug solution consists of paclitaxel or docetaxel, a pH regulator and a solvent for injection, wherein said solvent for injection is an organic solvent. Said emulsion includes a fat emulsion and is composed of oil for injection, an emulsifier, an antioxidant, an isotonic regulator, a stabilizer, a pH regulator and water for injection. When used, the drug solution at the clinical dosage can be added and mixed homogeneously in the emulsion to perform intravenous drip directly; or the drug solution at the clinical dosage can also be firstly added into the emulsion with no less than 5 times volume of the drug solution and then a predetermined amount of normal saline or glucose solution for injection is added to perform intravenous drip. The preparation of the present invention does not contain solubilizer and has advantages of little toxicity, safety, effectiveness, stability and economy. The fat emulsion is also used as a nutritional replenishment, thus achieving a better therapeutic effect. In addition, the normal saline or glucose solution for injection can be used to replace a considerable amount of the emulsion, which makes the preparation, therefore, not only cost-efficient, but also convenient for transportation and storage in practice.
Tianjin Tasly Group Co. | Date: 2010-10-22
A pharmaceutical solution of taxanes, its preparation method, a composition comprising said solution and its pharmaceutical combination package are disclosed. Said pharmaceutical solution comprises taxanes, a pH regulator and a solvent, wherein the pH regulator is a water-soluble acid.
Zhu Y.,Tianjin Tasly Group Co. |
Tong L.,Tianjin Tasly Group Co. |
Tong L.,Shenyang Pharmaceutical University |
Zhou S.,Tianjin Tasly Group Co. |
And 3 more authors.
Journal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences
A rapid, sensitive and reliable liquid chromatography tandem mass spectrometry (LC-MS/MS) method was developed and validated for simultaneous determination of five active flavonoids (wogonin, chrysin, oroxylin A, naringenin, hesperetin) and four major alkaloids (berberine, coptisine, jatrorrhizine, palmatine) from Tang-Min-Ling-Pill in rat plasma. Plasma samples (100μL) were spiked with internal standards daidzein (for flavonoids) and tetrahydropalmatine (for alkaloids), acidified with HCl and extracted by liquid-liquid extraction with acetone. Chromatographic separation was performed on a Zorbax SB-C18 column with the mobile phase of water (containing 0.1% of formic acid)-acetonitrile (30:70, v/v) at a flow rate of 0.3mL/min in a run time of 7.0min. Detection was performed by multiple reaction monitoring mode using electrospray ionization in the positive ion mode. All analytes showed good linearity over the investigated concentration range (r>0.9900). The validated lower limit of quantification was 1.01ng/mL for wogonin and oroxylin A, 0.238ng/mL for chrysin, 1.01ng/mL for naringenin, 0.998ng/mL for hesperetin, 0.0505ng/mL for berberine, 0.0996ng/mL for coptisine, 0.0501ng/mL for jatrorrhizine, 0.0889ng/mL for palmatine, respectively. Intra- and inter-day precision (RSD%) was less than 15% and accuracy (RE%) ranged from -7.5% to 4.5%. The validated method was successfully applied to investigate the pharmacokinetics of the major flavonoids and alkaloids of Tang-Min-Ling-Pill after oral administration to rats. © 2012 Published by Elsevier B.V. Source
Chen X.-P.,Tianjin University |
Chen X.-P.,Tianjin Institute of Pharmaceutical Research |
Chen X.-P.,Tianjin Tasly Group Co. |
Li W.,Tianjin Tasly Group Co. |
And 3 more authors.
Chinese Journal of Natural Medicines
The roots of Angelica sinensis (RAS), are a Chinese herbal medicine traditionally used in prescriptions for replenishing blood, treating abnormal menstruation, and other women's diseases. It has also been widely marketed as health food for women's care in Asia, and as a dietary supplement in Europe and America. RAS is well-known for its hematopoietic, antioxidant, and immunoregulatory activities. RAS also possesses anti-cancer, memory, radioprotective, and neuroprotective effects. Phytochemical investigations on this plant led to organic acids, phthalides, polysaccharides, and other metabiolites. Based on recent animal studies and clinical trials, RAS has been used in the treatment of gynecologic diseases, cardio-cerebrovascular disease, nervous system diseases, and nephrotic syndrome. In this review, the recent phytochemical and pharmacological studies, drug-drug interactions, clinical applications, and toxicity of RAS are summarized. © 2013 China Pharmaceutical University. Source