Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 9 de 9
Filter
Add filters








Language
Year range
1.
Article in Chinese | WPRIM | ID: wpr-879151

ABSTRACT

The paclitaxel-loaded and folic acid-modified poly(lactic-co-glycolic acid) nano-micelles(PTX@FA-PLGA-NMs) were prepared by the emulsion solvent evaporation method, and the parameters of paclitaxel-loaded nano-micelles were optimized with the particle size and PDI as evaluation indexes. The morphology of the nano-micelles was observed by transmission electron microscopy(TEM), and the stability, drug loading and encapsulation efficiency were systematically investigated. In vitro experiments were performed to study the cytotoxic effects of nano-micelles, apoptosis, and cellular uptake. Under the optimal parameters, the nano-micelles showed the particle size of(125.3±1.2) nm, the PDI of 0.086±0.026, the zeta potential of(-20.0±3.8) mV, the drug loading of 7.2%±0.75%, and the encapsulation efficiency of 50.7%±1.0%. The nano-micelles were in regular spherical shape as observed by TEM. The blank FA-PLGA-NMs exhibited almost no inhibitory effect on the proliferation and growth of tumor cells, while the drug-loaded nano-micelles and free PTX exhibited significant inhibitory effects. The IC_(50) of PTX@FA-PLGA-NMs and PTX was 0.56 μg·mL~(-1) and 0.66 μg·mL~(-1), respectively. The paclitaxel-loaded nano-micelles were potent in inhibiting cell migration as assessed by the scratch assay. PTX@FA-PLGA-NMs had good pro-apoptotic effect on cervical cancer HeLa cells and significantly promoted the uptake of HeLa cells. The results of in vitro experiments suggested that PTX@FA-PLGA-NMs could target and treat cervical cancer HeLa cells. Therefore, as nanodrug carriers, PTX@FA-PLGA-NMs with anti-cancer activity are a promising nano-system for improving the-rapeutic effects on tumors.


Subject(s)
Antineoplastic Agents, Phytogenic/pharmacology , Cell Line, Tumor , Drug Carriers , Female , Folic Acid , Glycolates , HeLa Cells , Humans , Micelles , Paclitaxel , Particle Size , Uterine Cervical Neoplasms/drug therapy
2.
Article in Chinese | WPRIM | ID: wpr-906161

ABSTRACT

Zexietang is derived from Jingui Yaolue (《金匮要略》), which is composed of Alismatis Rhizoma and Atractylodis Macrocephalae Rhizoma, and has the effect of inducing diuresis and invigorating the spleen to produce water. Compared with western medicine in the treatment of related diseases, Zexietang can not only improve the curative effect, but also reduce the occurrence of adverse reactions, so as to achieve long-term stable administration. The authors sorted out and analyzed the chemical composition, pharmacological effect and clinical application of Zexietang in recent years. It was found that the main active components of Zexietang were alismol A and B, 23-acetyl-alismol B and C, atractylenolides (atractylenolide Ⅰ, Ⅱ, Ⅲ) and polysaccharides. Pharmacological experiments showed that they had diuretic, hypolipidemic, anti-inflammatory and others. And it can be used in the treatment of hypertension, hyperlipidemia, vertigo, cerebral vascular insufficiency and other diseases combined with other Chinese materia medica, and the curative effect is obvious. By summarizing the research status of Zexietang in recent years, its active components and pharmacological mechanism can be further clarified, which provides the basis for the clinical application of Zexietang and guides the direction of its further research.

3.
Article in Chinese | WPRIM | ID: wpr-906069

ABSTRACT

The small size, moderate drug loading, and targeting properties of nano-preparations make them can be excellent delivery tools for drugs, genes or proteins crossing the cell or blood-brain barrier (BBB). Currently, facilitating drug crossing BBB with innovative nano-drug delivery systems is considered as a strategic approach for the prevention, diagnosis and treatment of central nervous system (CNS) diseases. However, with the deepening of the research, the adverse reactions and toxicity of nanocarriers have gradually attracted the attention of researchers. Based on this, this paper summarized the situation of BBB-penetrating targeted nano-preparations at home and abroad in recent years from the perspective of classification of types and properties of nanocarriers, and analyzed the advantages and disadvantages of each carrier. The results showed that nano-preparations with active ingredients of traditional Chinese medicine (TCM) as carriers have become a promising way of cancer treatment, but the complexity and diversity of TCM components limited its application to a certain extent. Further studies should be strengthened to lay a foundation for the application and development of TCM nano-preparations in the field of CNS diseases.

4.
Article in Chinese | WPRIM | ID: wpr-906004

ABSTRACT

As a Chinese saying goes, "good Chinese medicinal material makes good medicine", the traceability of Chinese medicinal materials is closely related to the high-quality development of Chinese medicine industry. This article intends to analyze the "new era of smarter food safety blueprint" and Proposed Rule for Food Traceability related to food traceability of the U.S. Food and Drug Administration (FDA), including food traceability list, critical tracking events, and examples of exemptions. By studying the process and consideration of the construction of the FDA food traceability system, as well as the specific traceability requirements of fresh herbs, vegetables and fruits in the FDA food traceability system that are related to Chinese medicinal materials, on the one hand, it provides research materials for the communication and discussion of Chinese medicinal materials traceability, on the other hand, it also provides reference for the construction of food traceability system in China. To sort out the idea of constructing a traceability system for Chinese medicinal materials suitable for the current development status of traditional Chinese medicine, the contents to be considered are as follows:①To determine the traceability list of Chinese medicinal materials based on the risk control of Chinese medicinal materials. ②Determine the critical tracking links and information in the Chinese medicinal materials industry chain, and standardize the traceability information of Chinese medicinal materials. ③The quality information of Chinese medicinal materials should be reflected in the traceability of Chinese medicinal materials. ④Within the scope of the traceability list of Chinese medicinal materials, enterprises should be encouraged to make voluntary traceability by selecting Chinese medicinal materials with a good foundation of traceability work.

5.
Article in Chinese | WPRIM | ID: wpr-802080

ABSTRACT

Objective: To establish a quality control method of standard decoction of Aurantti Fructus Immaturus(AFI),and to provide reference for quality evaluation of AFI dispensing granules and other related products of AFI. Method: A total of 16 batches of AFI pieces with different quality were collected from the market,including 13 batches of Citrus aurantium and 3 batches of C. sinensis,and the standard decoction of AFI was prepared according to the standard decoction process.Transfer rate of synephrine,dry extract rate and others of the standard decoction were regarded as evaluation indicators and relative assessment are conducted. Result: Transfer rates of synephrine in 13 batches of standard decoction of AFI(C. aurantium) were ranged from 35.7% to 92.7% with the average value was 61.9%;dry extract rates were varied from 20.7% to 43.8% and the average value was 28.4%;pH values were 4.48-5.32 with the average value was 4.99;the HPLC fingerprint similarities were >0.9 by comparing with the corresponding control fingerprint,6 common peaks were found and 3 of them were identified as naringin,hesperidin and neohesperidin.Transfer rates of synephrine in 3 batches of standard decoction of AFI(C. sinensis) were changed from 53.1% to 84.4%,and the average value was 73.2%;dry extract rates were shifted from 13.8% to 17.6% and the average value was 15.4%;pH values were 4.77-5.38 with the average value was 5.06;the HPLC fingerprint similarities were >0.9 by comparing with the corresponding control fingerprint,2 common peaks were found and one of them were identified as hesperidin. Conclusion: From the HPLC fingerprint of standard decoction of AFI,we can easily understand that the number of peaks in C. aurantium is obviously more than that of C. sinensis.This method has good precision,reproducibility and stability,it is suitable for quality evaluation for related products of AFI.Simultaneously,the research provides a good reference for identifying sources of AFI.

6.
Article in Chinese | WPRIM | ID: wpr-801984

ABSTRACT

Classical traditional Chinese medicine(TCM) excellent prescriptions is an outstanding representative in prescriptions of traditional Chinese medicine,clinical medicine effective tool,and the essence of traditional culture of Chinese medicine.The research and development of classical TCM excellent prescriptions has attracted great attention from group in the whole industry chain of TCM,a series of guiding suggestions and targeted literature laid a good foundation for research and development of classical TCM excellent prescriptions.In this paper,based on the CNKI database,literature about suggestions or enlightenments of classical TCM excellent prescriptions was sorted and refined in order to build the research outline of classical TCM excellent prescriptions,and it was concluded that literature research was the premise,medicine/decoction pieces with good quality was the foundation,standard substance was the core,high quality was the guarantee and preferential policies were the impetus,and related discussions were carried out.All these were expected to promote the research of classical TCM excellent prescriptions and development of related industries.

7.
Article in Chinese | WPRIM | ID: wpr-851332

ABSTRACT

Objective: To prepare standard decoction of Alismatis Rhizoma (AR) and establish its quality evaluation system, and provide reference for the development of dispensing granules of AR. Methods: A total of 18 batches of AR decoction pieces were collected to prepare standard decoction of AR according to the standard process. Quality evaluation system of standard decoction of AR was established with pH value, dry extract rate, fingerprint similarity and transfer rate of alisol B 23-acetate as indexes. Results: The mass fraction of alisol B 23-acetate in AR decoction pieces was 0.057%—0.267% with the average value of 0.156%, water content was 9.2%—12.8% with the average value of 10.44%; the pH value of standard decoction of AR was 4.11—5.60, dry extract rate was 10.25%—17.09%; transfer rate of alisol B 23-acetate from decoction pieces to standard decoction was 10.49%—17.49%. Conclusion: The established quality evaluation method is stable and feasible, which is suitable for the development and quality evaluation of standard decoction of AR, which can provide reference for the development of dispensing granules of AR and related classic formulas.

8.
Article in Chinese | WPRIM | ID: wpr-773176

ABSTRACT

To establish a quality constant evaluation system of Alismatis Rhizoma decoction pieces,in order to provide reference for regulating the market circulation of this decoction pieces. A total of 18 batches of Alismatis Rhizoma decoction pieces were collected from different pharmaceutical factories,and the morphological parameters of each sample were tested. The content of alisol B 23-acetate in Alismatis Rhizoma decoction pieces was determined by HPLC in the 2015 edition of Chinese Pharmacopoeia,and the parameters such as quality constant and relative quality constant were calculated. The quality constant range of 18 batches of Alismatis Rhizoma decoction pieces was 0. 390-2. 076. If 18 batches of Alismatis Rhizoma decoction pieces were divided into 3 grades,taking 80% of the maximum quality constant as first grade,50% to 80% as second grade,and the rest as third grade,then the quality constant of firstgrade samples was ≥1. 66,the quality constant of second-grade samples was ≥1. 04 and <1. 66,and the quality constant of third-grade samples was <1. 04. The established quality constant evaluation method is objective and feasible,which can be used to classify the grade of Alismatis Rhizoma decoction pieces and provide a reference method to control the quality of this decoction pieces.


Subject(s)
Alisma , Chemistry , Chromatography, High Pressure Liquid , Drugs, Chinese Herbal , Reference Standards , Quality Control , Rhizome , Chemistry
9.
Article in Chinese | WPRIM | ID: wpr-231010

ABSTRACT

In this study, an HPLC method was developed for simultaneous determination of seven alkaloids (cytosine, oxymatrine, N-oxysophocarpine, N-methylcytisine, sophoranol, matrine, and sophocarpine) and three flavonoids (trifolirhizin, fermononetin, and maackiain) from different samples of Sophorae Tonkinensis Radix et Rhizoma. Samples were analyzed on a Welch XtimateTM C₁₈ column (4. 6 mm× 250 mm, 5 μm) eluted with the mobile phase of acetonitrile (A) and 0.01 mol•L⁻¹ ammonium acetate solution (pH 8.0) (B) in a linear gradient mode as follows: 0-20 min,4%-14% A;20-30 min,14%-25% A;30-45 min,25%-40% A;45-65 min,40%-55% A;65-75 min,55% A. The flow rate of the mobile phase, the column temperature, and the PDA detector wavelength were set at 1.0 mL•min⁻¹, 30 ℃, and 225 nm, respectively. For the method validation, these ten compounds showed good separation and satisfactory linearity (r≥0.999 7) within the concentration ranges tested. The mean recoveries were in the range of 98.60% to 102.6% with the RSD (n=6) between 0.60% and 3.7%. This method was proved to be simple, accurate and repeatable. The quantitative results showed that there were significant differences in the contents of seven alkaloids and three flavonoids among the different samples. This result revealed that the quality of Sophorae Tonkinensis Radix et Rhizoma varied widely. This method could be used for the simultaneous determination of the multi-ingredients from Sophorae Tonkinensis Radix et Rhizoma, which might provide scientific evidences to evaluate/control the quality of Sophorae Tonkinensis Radix et Rhizoma, comprehensively.

SELECTION OF CITATIONS
SEARCH DETAIL