Application research and design strategy on smart responsive mesoporous silica anti-tumor nanodelivery systems / 药学学报

Malignant tumors are major diseases that endanger human health. Due to their complex and variable microenvironment, most anti-tumor drugs cannot precisely reach the focal tissue and be released in a controlled manner. Intelligent responsive nano carriers have become a hot spot in the field of anti-tumor drug delivery systems. As an excellent nano material, mesoporous silica has the advantages of non-toxic, stable, adjustable pore volume and pore diameter, and easy functional modification on the surface. By virtue of its perceptive response to the tumor microenvironment or physiological changes, it can achieve the targeted drug release or controlled drug release of the drug delivery system in the tissue, making it an ideal carrier for intelligent response drug delivery system. In this paper, we review the design strategies and current research status of smart responsive anti-tumor drug delivery systems based on mesoporous silica, in order to provide a reference for the development of anti-tumor drug nanoformulations.

Oral mucosal drug delivery system based on nano technology / 药学学报

Oral mucosal drug delivery has the advantages of rapid drug absorption, no first-pass effect and good patient compliance. However, factors such as low drug dissolution, saliva carrying the drug into the gastrointestinal tract and the existence of physiological barriers in the mucosa may affect the mucosal permeation and bioavailability of the drug. Nanotechnology applied to drug oral mucosa delivery can overcome the above disadvantages and obtain efficient absorption effect. This paper describes the physiological structure of oral mucosa and the factors affecting the absorption of drugs in oral mucosa, reviews the application of nanotechnology such as liposomes, solid lipid nanoparticles, nanostructured lipid carriers, nanoemulsions, polymer nanoparticles, polymer micelles and nanohybrid suspensions in oral mucosal drug delivery and the mechanism of promoting drug absorption, summarizes the main problems of current research, and gives an outlook on the application of nano oral mucosal drug delivery system. The main problems of current research are summarized, and the prospects for the application of nano oral mucosal drug delivery systems are discussed.

Application progress on anti-skin aging effect of traditional Chinese medicine / 药学学报

With the aging of population intensifies and the level of population health have improved, thus much attention has been directed to how to delaying or preventing skin aging. Skin aging is associated with age, ultraviolet and lifestyle, mainly characterized as skin sagging, wrinkles, pigmentation, so it is urgent to seek traditional Chinese medicine and related cosmetics to solve the problem of skin aging. Traditional Chinese medicine has the functions of anti-oxidation, enhancing human immunity, promoting body metabolism and regulating endocrine, therefore, it has become a research focus in anti-skin aging. This article reviews the skin aging mechanism and the research advances of traditional Chinese medicine anti-skin aging, in order to provide a reference for future research and development of anti-aging traditional Chinese medicine.

Research progress and thinking on improving physicochemical properties and efficacy of the active ingredients in traditional Chinese medicine based on crystal structure / 药学学报

The active ingredients in traditional Chinese medicine have been reported to possess significant pharmacological activity and played an important role in clinical treatments. However, lots of the active ingredients in traditional Chinese medicine suffer from disadvantages such as low solubility, high melting point and low stability that results in low bioavailability and limit its clinical application. Crystal structure plays an important role in improving physicochemical properties and efficacy of the active ingredients in traditional Chinese medicine. This review concludes the research advances of several crystal forms used in the active ingredients in traditional Chinese medicine in terms of polymorph, cocrystal, amorphous/coamorphous and nanocrystal. And the effects of crystal forms on the physicochemical properties and efficacy of the active ingredients in traditional Chinese medicine were reviewed. This research may be useful for the formulation preparation and development of the active ingredients in traditional Chinese medicine.

Review and prospect on preparation technology of drug nanocrystals in the past thirty years / 药学学报

Nanocrystals is a hot topic of poorly soluble drug delivery system under development. Nanocrystals is different from the nanoparticles for drug unloading in polymer materials, and nanocrystals is different from solid dispersion system, in which the drug maintains crystals state. Nanocrystals has a simple preparation process, represents an effective technology in the improvement of solubility and bioavailability of poorly soluble drugs, and has a very promising industrialization application and development potential. In this paper, we retrospect the development history of drug nanocrystals technology, review development of the preparation methods of nanocrystals, and analyze the existing problems to provide a reference to the development of drug nanocrystals preparation.

Status, problems and warranty strategy of quality uniformity for traditional Chinese medicine preparations / 中国中药杂志

The quality uniformity of traditional Chinese medicine (TCM) preparation is the base for guaranteeing the safety and effectiveness of clinical medication. At present, the quality of TCM preparation is uneven. At present, the same TCM preparation in different manufacturers, TCM preparations in the same manufacturer, and even different batches of a same TCM preparation in the same manufacturer have great differences in quality, which can not reach stability and uniformity. This paper would discuss the possible factors that influence the uniformity of quality in the whole process of pharmacy by means of consulting relevant literature on quality control of Chinese herbal preparations and analyzing the present situation and problems of the quality of TCM preparation. In addition, some strategies such as standardization of cultivation of TCM, processing standardization, standardization of pharmaceutical equipment, mixed batch feeding, and Quality by Design would be also put forward to provide references for the quality uniformity of TCM preparation.

Effect and regulation of drying on quality of traditional Chinese medicine pills / 中国中药杂志

The dry quality of traditional Chinese medicine pills is the hot spot of pills research, because their quality has a crucial effect on the efficacy and development of dosage forms. Through literature research and statistical analysis, we would review the current problems on the drying of traditional Chinese medicine pills in this paper, and surrounding the evaluation system for traditional Chinese medicine pills, analyze the characteristics of common drying equipment and processes as well as their effect on quality of pills, discuss the problems in drying equipment and process as well as quality, and put forward the corresponding strategies, hoping to provide new ideas and new methods for the quality improvement of traditional Chinese medicine pills and quality standards.

Drying mechanism of "like-glass transition" and quality control strategy on Chinese materia medica pills / 中草药

Study on drying quality of pill (false drying, surface crust, and cracks) is the difficulty in pharmaceutic research of Chinese materia medica (CMM). The influence mechanism and relationship of quality of CMM pill during drying and storage are still in the experimental stage, and there is no more appropriate theory to explain and research. This paper attempts to use glass transition theory to explore drying characteristics and physical state change process and mechanism of quality change and to control the quality change of strategy of CMM pill during drying and storage.

Status and problem analysis of drying process and equipment for traditional Chinese medicinal materials and preparations / 中国中药杂志

Drying is the critical link during pharmaceutical process of traditional Chinese medicine (TCM), which is directly related to the quality of drugs. The key to technology upgrading of pharmaceutical equipment in Chinese materia medica enterprise is the development of new drying techniques, which concerns the modernization of TCM. The study provides new ideas for the drying technology and equipment by means of reviewing the research status of drying process for the traditional Chinese medicinal materials and preparations, and analyzing the traditional and modern drying methods and equipment, as well as their existing problems and corresponding measures for the drying processes and equipment. In addition, this paper expounds the development trend of traditional Chinese medicinal materials and preparations of drying process and equipment.

Advance in studies on establishment methods of responsive drug delivery system / 中国中药杂志

Responsive drug delivery system can release drug at specific time and sites, and effectively overcome the drug resistance of organisms. With such advantages as drug protection, local targeting, inhibition of enzymatic activity, memory and expression, it has good prospect of application. So far, many chemical preparations have been launched in the market. This article mainly summarizes the advance in studies on establishment methods of responsive drug delivery system, while proposing research ideas for the traditional Chinese medicine component-based responsive drug delivery system according to the multi-component, multi-link and multi-target characteristics, in the expectation of providing reference and thought for the development of the drug delivery system.

The research progress of preparation methods of solid nanocrystal delivery system / 药学学报

Nanocrystal suspensions drug delivery system is used to solve the delivery difficulty of poorly soluble drug. However, the physical stability of liquid nanocrystal suspensions is very bad. Solid nanocrystal delivery system as a novel technology, can improve the thermokinetics stability of nanocrystal suspensions and have good clinical compliance, which can achieve stabilization of nanocrystal suspension systems as an ideal delivery system. In this paper, we reviewed the research progress of nanotechnology and solidification technology of solid nanocrystal suspension delivery system, which will give the new mirrors and thoughts on the development of solid nanocrystal delivery system.

"Total amount" release kinetics evaluation of traditional Chinese medicine sustained-release preparations based on material rough set theory / 药学学报

The release kinetics research of sustained-release formulations of traditional Chinese medicines (TCM) is an inalienable part of the chain of TCM modernization, which plays an important role in the development of modern compound TCM preparation. However, the research method or pattern in line with the specific characteristics of TCM, i.e., multi-component and multi-target, is still lacking. On the basis of material rough set theory, this paper reviewed the advantages and disadvantages of the existing evaluation patterns and methods, a tentative idea about the "total amount" release characteristics evaluation on TCM compound sustained-release preparation has suggested so as to evaluate the release kinetics and to promote the development of evaluation methodology on TCM sustained-release preparations.

Preparation and characterization of the puerarin submicron emulsion / 药学学报

To decrease the hemolysis side effect of puerarin, the basic formula and preparation of puerarin submicron emulsion were optimized and the physicochemical properties were evaluated. Puerarin submicron emulsions were prepared by phase inversion-ultrasound combining with phospholipids complexes technology. The effects of preparative parameters, such as emulsification time, stirring velocity and ultrasound time, on mean diameter, span of dispersity, entrapment efficiency and overall desirability were investigated. The three dimensional response surface graphs were produced by second-order polynomial and liner equation, which predict the optimal experiment conditions. All response variables were found to be greatly dependent on three independent variables. Second-order polynomial equations were fitter than liner equations for this study. The optimal emulsification time, stirring velocity and ultrasound time was 15 min, 2 000 r x min(-1), 30 min, respectively. The mean diameter, span of dispersity, entrapment efficiency, drug content and zeta potential of emulsions prepared by the method were 228.23 nm, 0.628 4, 84. 32%, 9.98 mg x mL(-1), - 29.03 mV, respectively. Puerarin submicron emulsion was prepared by the optimized preparation method. The narrow particle diameter distribution, high envelopment efficacy and good stability were obtained. The physicochemical properties were suitable for the requirement of the intravenous emulsion.