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1.
Acta Pharmaceutica Sinica ; (12): 2785-2793, 2023.
Article in Chinese | WPRIM | ID: wpr-999008

ABSTRACT

The clinical tumor therapy was greatly challenged due to the complex characteristics of tumor microenvironment, however, which also provide arena for novel therapeutic strategies. In this study, poly(2-ethyl-2-oxazoline)-poly(lactic acid)-SS-poly(β-amino ester (PEOz-PLA-SS-PBAE) triblock copolymers with pH and GSH double response were synthesized, polymer micelles were prepared by thin film hydration method for loading of silybin to improve its antitumor activity. The critical micelle concentration was determined by pyrene fluorescence method as 1.8 μg·mL-1. The particle size was 155.30 ± 1.80 nm as determined by dynamic light scattering, with polydispersity index of 0.168 ± 0.004. The drug loading and entrapment efficiency of the micelles were determined by HPLC as (5.48 ± 0.04)% and (68.52 ± 0.48)%, respectively. The in vitro drug release profiles showed that the micelles have low pH sensitivity and high GSH responsiveness, and exhibited sustained release profiles. The good biocompatibility of the material was proved by measuring the hemolysis rate and cytotoxicity of the blank micelle. The cytotoxicity and apoptosis rate of tumor cells showed that the drug loaded PEOz-PLA-SS-PBAE micelles had significant inhibitory effect and apoptosis-inducing effect on MDA-MB-231 cells. The results of wounding healing assay and Transwell invasion test showed that the drug loaded PEOz-PLA-SS-PBAE micelles could significantly inhibit the metastasis of MDA-MB-231 cells. The PEOz-PLA-SS-PBAE drug-loaded micelles prepared in this study have good inhibitory effect on tumor growth and anti-tumor metastasis in vitro, which lays the foundation for the further application of silybin.

2.
Chinese Journal of Experimental Traditional Medical Formulae ; (24): 137-141, 2020.
Article in Chinese | WPRIM | ID: wpr-873031

ABSTRACT

Objective:To investigate the effect of different angles of atomizer on the delivery rates and total delivery quantities of Tanreqing inhalation solution, so as to provide reference for the clinical use of this preparation. Method:Taking baicalin, ursodeoxycholic acid, caffeic acid as indexes, PARI Boy SX compression atomization inhaler (equipped with red core atomizing cup) and BRS2000 respiratory simulator were used, the effects of different angles of the atomizer (upper 15 degree, lower 15 degree, upper 30 degree, lower 30 degree, partial 15 degree, partial 30 degree, vertical) on the delivery rates and total delivery quantities of Tanreqing inhalation solution were investigated. The respiratory patterns of adults, children, infants and young children were selected to determine the delivery rates and total delivery quantities of three components in Tanreqing inhalation solution. Result:In the same atomization time, the delivery rates and the total delivery quantities of caffeic acid and ursodeoxycholic acid in Tanreqing inhalation solution were not significantly affected by the atomizer from different angles, but significantly affected baicalin. At the vertical angle, the delivery rate and total delivery quantity of baicalin were higher than the other angles. Under different respiratory modes, there were significant differences in the delivery rates and total delivery quantities of these three components in the inhalation solution. Compared with other respiratory modes, the delivery rates and total delivery quantities of baicalin, ursodeoxycholic acid and caffeic acid were the highest in the adult respiratory mode, with delivery rates of (555.5±16.61), (226.3±6.54), (26.1±0.32) μg·min-1 and total delivery quantities of (4 001.1±82.97), (1 754.9±63.73), (167.6±1.42) μg, respectively. Conclusion:The use angle of atomizer has a certain effect on the delivery rate and total delivery quantity of Tanreqing inhalation solution, so it is suggested that the vertical angle should be kept as far as possible in clinical use. Under the four respiratory patterns, the delivery rate and total delivery quantity of Tanreqing inhalation solution are different, suggesting that the atomization dose or atomization time should be adjusted according to the respiratory characteristics of the patients to ensure the safety and effectiveness of clinical medication.

3.
Acta Pharmaceutica Sinica ; (12): 1914-1922, 2020.
Article in Chinese | WPRIM | ID: wpr-825147

ABSTRACT

The non-specific administration of antitumor drugs is the main cause for the side effects of chemotherapy drugs on normal tissues. The application of nanotechnology in the delivery of anti-tumor drugs is one of the important ways to improve the therapeutic effect and to reduce the side effects. The current study aimed to synthesize pH responsive poly (methoxy-ethylene glycol)-poly(lactic acid)-poly-(β-amino ester) (PBAE) triblock copolymers to deliver docetaxel (DTX) and improve the anti-tumor activity of DTX. PBAE was synthesized by ring opening polymerization and Michael addition reaction, its structure and molecular weight was characterized by 1H NMR, the dissociation constant of base (pKb) were determined by acid-base titration method. The critical micelles concentration (CMC) of copolymers was measured by pyrene fluorescence spectroscopy. DTX loaded copolymer micelles were prepared by membrane hydration method. The size and its distribution as well as the stability of micelles were determined by laser light scattering analysis. The drug loading content (DL), entrapment efficiency (EE) and cumulative drug release from micelles were evaluated by high-performance liquid chromatography (HPLC). The sizes of DTX drug-loaded micelles were in the range of 10 to 100 nm with narrow distribution. DL of DTX in PBAE1 and PBAE2 micelles was (5.3 ± 0.10) % and (4.9 ± 0.05) %, respectively, with EE was (93.8 ± 1.70) % and (87.2 ± 4.10) %, respectively. The drug-loaded micelles showed pH sensitive drug release properties under weak acidic conditions, which showed potential drug release of DTX under mild acidic tumor environment. A mouse Lewis lung carcinoma model was established to evaluate the therapeutic efficacy of micellar DTX formulations. Significant inhibitory effect of the nanodrugs was observed with DTX dosages of 10 and 20 mg·kg-1, respectively. Moreover, the pH responsive PBAE1-DTX micellar drug exhibited stronger therapeutic efficacy on mice xenograft tumor, as compared with the non pH sensitive micellar drug (PELA-DTX) and free DTX. All animal experiments were performed according to the animal ethical standards and approved by the Animal Experiments and Ethical Committee of China Academy of Chinese Medical Sciences (No. 2017090110). The in vivo anti-tumor activity studies showed that the tumor volume growth rates of mice in different drug-administered groups were: PBAE1-DTX 20 mg·kg-1 < PBAE1-DTX 10 mg·kg-1 < PELA-DTX 10 mg·kg-1 < DTX 10 mg·kg-1 < normal saline, with the PBAE1-DTX group as the most potent group for tumor inhibition. The current pH sensitive DTX nano-micelles showed high potential in further studies to promote the application of nano DTX formulations for tumor treatment.

4.
Chinese Journal of Experimental Traditional Medical Formulae ; (24): 140-145, 2019.
Article in Chinese | WPRIM | ID: wpr-802078

ABSTRACT

Objective: To investigate the pharmacokinetics and the distribution in tumor tissues of docetaxel nanomicelles. Method: The docetaxel nanomicelles was prepared by filming-rehydration method.HPLC was employed to determine the content of docetaxel in biological samples and the corresponding methodological evaluation was carried out.The mouse Lewis lung carcinoma model was established,when dosage of administration in tail vein was 20 mg·kg-1,and then the effect of free drug(DTX),non-pH-sensitive drug-loaded micelles(PELA-DTX) and pH-sensitive drug-loaded micelles(PBAE-DTX) on the pharmacokinetics and tissue distribution of tumor-bearing mice were investigated. Result: The docetaxel nanomicelles(PELA-DTX and PBAE-DTX) were successfully prepared.The method for the determination of docetaxel in mice was established by HPLC,the linearity,precision of the method and the recovery rate of samples all met the requirements.In the pharmacokinetic study,the plasma concentration of PBAE-DTX was always at a high level within 24 h.Compared with PELA-DTX and DTX,the areas under the curve(AUC0-∞) of PBAE-DTX were increased by 3.63% and 8.96%,the mean residence times(MRT) were extended by 2.86% and 6.43%,the half-life and the drug blood circulation time were prolonged.In the tissue distribution study,it was found that three docetaxel preparations were distributed in the heart,liver,spleen,lung,kidney and tumor tissue within 1 h after administration,but the distribution of these drugs in the tissues was reduced along with the extension of time,the accumulation of PBAE-DTX in tumor tissue was significantly higher than that in DTX and PELA-DTX at 24 h. Conclusion: PBAE-DTX can prolong the circulation time of docetaxel in the blood,increase its bioavailability,and significantly increase its distribution in tumor tissue.

5.
Chinese Journal of Experimental Traditional Medical Formulae ; (24): 177-182, 2019.
Article in Chinese | WPRIM | ID: wpr-801713

ABSTRACT

Objective: To study on the physical and chemical properties of dichroa alkali hydrochloride and to establish a method for the determination of entrapment efficiency of dichroa alkali hydrochloride liposomes. Method: HPLC was used to determine the content of dichroa alkali hydrochloride with mobile phase of acetonitrile-water-triethylamine-glacial acetic acid(9:91:0.35:0.75) and detection wavelength at 265 nm.The oil-water partition coefficient of this compound in different pH range was measured by shake flask method.The stability of the dichroa alkali hydrochloride in phosphate buffer solution with different pH after sterilization at 125℃ for 30 min was investigated.Ammonium sulfate gradient method was used to prepare dichroa alkali hydrochloride liposomes.The microcolumn was prepared by dextran gel and cation exchange resin,respectively.Then the free drug and liposome were separated by centrifugation,the drug content was measured,and the encapsulation efficiency was calculated.The t-test was performed using SPSS 20.0 software,the differences between these two methods were compared. Result: In the pH 6-9,the oil-water partition coefficient of dichroa alkali hydrochloride increased with increasing of pH,which was between 0.016 and 1.44;the recovery rate of dichroa alkali hydrochloride after sterilization was 37.16%-57.91%.Between the dextran gel microcolumn centrifugation and the cation exchange resin microcolumn centrifugation,there was no significant difference in the entrapment efficiency of the liposomes. Conclusion: Dichroa alkali hydrochloride is suitable for preparation of liposomes.However,its stability is not ideal,so the experimental temperature should be strictly controlled in the preparation process.Dextran gel microcolumn centrifugation and cation exchange resin microcolumn centrifugation can be used to determine the entrapment efficiency of dichroa alkali hydrochloride liposomes,and the cation exchange resin microcolumn centrifugation is suggested after comparison.

6.
China Journal of Chinese Materia Medica ; (24): 2251-2259, 2019.
Article in Chinese | WPRIM | ID: wpr-773100

ABSTRACT

Docetaxel-loaded nanomicelles were prepared in this study to improve the solubility and tumor targeting effect of docetaxel(DTX),and further evaluate their anticancer effects in vitro. PBAE-DTX nanomicelles were prepared by film-hydration method with amphiphilic block copolymer polyethyleneglycol methoxy-polylactide(PELA) and pH sensitive triblock copolymer polyethyleneglycol methoxy-polylactide-poly-β-aminoester(PBAE) were used respectively to prepare PELA-DTX nanomicelles and PBAE-DTX nanomicelles. The nanomicelles were characterized by physicochemical properties and the activity of mice Lewis lung cancer cells was studied. The results of particle size measurement showed that the blank micelles and drug-loaded micelles had similar particle sizes, ranging from 10 to 100 nm. The particle size of PBAE micelles was changed under weak acidic conditions, with good pH response. The encapsulation efficiency of the above two types of DTX-loaded nanomicelles determined by HPLC was(93.8±1.70)% and(87.2±4.10)%, and the drug loading amount was(5.3±0.10)% and(4.9±0.05)%,respectively. Furthermore,the DTX micelles also showed significant inhibitory effects on Lewis lung cancer cells by MTT assay, and pH-sensitive PBAE-DTX showed better cytotoxicity. The results of flow cytometry indicated that,the apoptosis rate of lung cancer Lewis cells was(20.72±1.47)%,(29.71±2.38)%,and(40.91±1.90)%(P<0.05) at 48 h after treatment in DTX,PELA-DTX,and PBAE-DTX groups. The results showed that different docetaxel preparations could promote the apoptosis of Lewis cells, and PBAE-DTX had stronger apoptotic-promoting effect. The pH-sensitive DTX-loaded micelles are promising candidates in developing stimuli triggered drug delivery systems in acidic tumor micro-environments with improved inhibitory effects of tumor growth on Lewis lung cancer.


Subject(s)
Animals , Mice , Antineoplastic Agents , Pharmacology , Cell Line, Tumor , Docetaxel , Pharmacology , Drug Carriers , Lung Neoplasms , Drug Therapy , Pathology , Micelles , Nanoparticles , Particle Size , Taxoids
7.
China Journal of Chinese Materia Medica ; (24): 520-526, 2018.
Article in Chinese | WPRIM | ID: wpr-771707

ABSTRACT

Ginger juice, a commonly used adjuvant for Chinese materia medica, is applied in processing of multiple Chinese herbal decoction pieces. Because of the raw materials and preparation process of ginger juice, it is difficult to be preserved for a long time, and the dosage of ginger juice in the processing can not be determined base on its content of main compositions. Ginger juice from different sources is hard to achieve consistent effect during the processing of traditional Chinese herbal decoction pieces. Based on the previous studies, the freeze drying of ginger juice under different shelf temperatures and vacuum degrees were studied, and the optimized freeze drying condition of ginger juice was determined. The content determination method for 6-gingerol, 8-gingerol, 10-gingerol and 6-shagaol in ginger juice and redissolved ginger juice was established. The content changes of 6-gingerol, 8-gingerol, 10-gingerol, 6-gingerol, 6-shagaol, volatile oil and total phenol were studied through the drying process and 30 days preservation period. The results showed that the freeze drying time of ginger juice was shortened after process optimization; the compositions basically remained unchanged after freeze drying, and there was no significant changes in the total phenol content and gingerol content, but the volatile oil content was significantly decreased(<0.05). Within 30 days, the contents of gingerol, total phenol, and volatile oil were on the decline as a whole. This study has preliminarily proved the feasibility of freeze-drying process of ginger juice as an adjuvant for Chinese medicine processing.


Subject(s)
Adjuvants, Pharmaceutic , Chemistry, Pharmaceutical , Methods , Drugs, Chinese Herbal , Reference Standards , Freeze Drying , Zingiber officinale , Chemistry , Materia Medica , Reference Standards
8.
Chinese Journal of Information on Traditional Chinese Medicine ; (12): 132-136, 2017.
Article in Chinese | WPRIM | ID: wpr-661244

ABSTRACT

Compared with traditional drying methods for Chinese materia medica, microwave drying technology is not only with the features of easy and convenient to operate, rapidity, good effects, well remained appearance of medicine and low energy consumption, but also with the feature of extraordinary sterilization effects at the same time with drying. This article introduced the features and effects of microwave drying and sterilization technology, reviewed its application in the TCM field, and proposed existing problems and prospects in the recent research by targeting security problems (microwave radiation and microwave residue).

9.
Chinese Journal of Information on Traditional Chinese Medicine ; (12): 132-136, 2017.
Article in Chinese | WPRIM | ID: wpr-658325

ABSTRACT

Compared with traditional drying methods for Chinese materia medica, microwave drying technology is not only with the features of easy and convenient to operate, rapidity, good effects, well remained appearance of medicine and low energy consumption, but also with the feature of extraordinary sterilization effects at the same time with drying. This article introduced the features and effects of microwave drying and sterilization technology, reviewed its application in the TCM field, and proposed existing problems and prospects in the recent research by targeting security problems (microwave radiation and microwave residue).

10.
Chinese Journal of Information on Traditional Chinese Medicine ; (12): 68-72, 2017.
Article in Chinese | WPRIM | ID: wpr-614180

ABSTRACT

Objective To investigate the effects of moisture-proof materials and contents on hygroscopicity of Yixinshu Capsules; To improve moisture-proof function of Yixinshu Capsules. Methods The hygroscopicity performance of Yixinshu Capsules was analyzed with the indexes of moisture absorption rate and critical relative humidity (CRH), and effects of soluble starch, maize starch, dextrin, lactose, mannitol, calcium hydrogen phosphate, ethylcellulose, microcrystalline cellulose, hypromellose and low-substituted hydroxypropyl cellulose on hygroscopicity of Yixinshu Capsules were compared. The effects of optimized excipients and capsule contents after granulation on hygroscopicity of Yixinshu Capsules were tested. Results Lactose, microcrystalline cellulose and mannitol were the most appropriate moisture-proof excipients for Yixinshu Capsules with balanced moisture absorption rate of 18.04%, for which the best proportion of Yixinshu Capsules to excipients was 1 to 0.1 (wt%). The balanced moisture absorption rate of the powders were 14.87%, 14.39%, and 15.38%, respectively, whereas the granules were 10.75%, 10.29%, and 11.13%, respectively. Conclusion The selected excipients can effectively reduce the hygroscopic rate of the Yixinshu Capsules, and its granules can promote the moisture resistance of Yixinshu Capsules.

11.
China Journal of Chinese Materia Medica ; (24): 2982-2987, 2015.
Article in Chinese | WPRIM | ID: wpr-284813

ABSTRACT

To develop an ophthalmic preparation of Shedan, an in situ forming gel was prepared with the formulation containing 18% of poloxamer 407 and 5% of poloxamer 188 by response surface designs plus central composite designs. The rheology results showed that LVE range gamma should limited within 0.5%, Shedan high-frequency region, and the thixotropy recovery time is less than 5 seconds. The phase transition temperature was 33.25 °C according to curve of storage modulus and loss modulus determined by temperature scanning. Surface tension and osmometer of it determined by surface tension meter and dew point osmometer were 36.43 mN · m(-1), and 320.6 mOsm · kg(-1), respectively. Fluorescein sodium was selected as the marker to monitor the corneal residence time, and the results showed that Shedan gel could prolong drug residence for 180 min. In line with zero-order kinetics, releases of muscone and salvianolic acid B in vitro depends on gels erosion. The results of rabbit ocular irritation experiments suggested that Shedan in situ forming gel was biocompatible and nonirritant. In conclusion, a novel Shedan in situ forming gel was developed and characterized for potential drug treatment of retinal vein occlusion.


Subject(s)
Animals , Female , Male , Rabbits , Benzofurans , Chemistry , Cycloparaffins , Chemistry , Gels , Chemistry , Ophthalmic Solutions , Poloxamer , Chemistry , Retinal Vein Occlusion , Drug Therapy , Viscosity
12.
China Journal of Chinese Materia Medica ; (24): 46-51, 2012.
Article in Chinese | WPRIM | ID: wpr-288648

ABSTRACT

<p><b>OBJECTIVE</b>To prepare Dange Mingmu in-situ forming eye gel.</p><p><b>METHOD</b>The viscosity of Dange Mingmu in-situ forming eye gel was tested by adopting poloxamer 407 and 188 as thermosensitive materials, and optimizing by uniform design. Drug release in vitro was studied using a novel membraneless model. Eye irritation experiments were performed with rabbits. The duration of residence time in rabbit eyes was observed using fluorescence tracer method.</p><p><b>RESULT</b>The gelation temperature of in-situ thermosensitive gel was lowered as the P407 concentration increased. In a certain range, the gelation temperature slowly increased with the increase of P188's concentration, and the effect of P407 was greater than that of P188. The optimized concentration of P407/P188 was 19%/1%. Based the adjusted concentration, Dange Mingmu in-situ forming eye gel. was converted into freely flowing liquid below 26.9 degrees C and became gel at 34.5 degrees C after being diluted with STF. In line with zero-order kinetics, drug release in vitro depends on gel erosion. The residence time on the surface of eyes was proved to be relatively long was and nonirritant.</p><p><b>CONCLUSION</b>Uniform design is available for optimizing the formulation of thermosensitive gel for eye. The gel satisfies the requirement for ophthalmic application, and is expected to be applied in clinical practice in the future.</p>


Subject(s)
Animals , Humans , Rabbits , Drug Compounding , Methods , Drugs, Chinese Herbal , Chemistry , Pharmacology , Eye Diseases , Drug Therapy , Gels , Chemistry , Pharmacology , Ophthalmic Solutions , Chemistry , Pharmacology , Temperature , Viscosity
13.
National Journal of Andrology ; (12): 436-440, 2012.
Article in Chinese | WPRIM | ID: wpr-286484

ABSTRACT

<p><b>OBJECTIVE</b>To investigate and compare the effectiveness and safety of 80-W GreenLight laser vaporization and GreenLight high-performance system (HPS) 120-W laser vaporization for the treatment of benign prostatic hyperplasia (BPH) in high-risk patients.</p><p><b>METHODS</b>We allocated 290 high-risk patients with BPH to two groups to receive 80-W (n = 220) and HPS 120-W GreenLight laser vaporization (n = 70). We recorded and compared the pre-, intra- and post-operative clinical data of the two groups.</p><p><b>RESULTS</b>The operations were successful in both of the groups. There were statistically significant differences in the prostate volume, IPSS, Qmax and PVR before and after surgery (P < 0.01), but not between the two groups (P > 0.05). The operation time, lasing time and energy consumption were (56.5 +/- 22.6) min, (31.2 +/- 10.3) min and (159.8 +/- 29.0) kJ in the 80-W group, as compared with (45.1 +/- 20.4) min, (24.6 +/- 8.3) min and (134.2 +/- 23.3) kJ in the 120 W group, with significant differences between the two (P < 0.01).</p><p><b>CONCLUSION</b>GreenLight laser vaporization of the prostate is a safe and effective procedure for the treatment of BPH, and the new HPS 120-W laser therapy, with its advantages of easier operation and shorter surgical time, is an even better minimally invasive option for elderly high-risk patients.</p>


Subject(s)
Aged , Aged, 80 and over , Humans , Male , Laser Therapy , Methods , Prostatic Hyperplasia , General Surgery , Treatment Outcome
14.
China Journal of Chinese Materia Medica ; (24): 2546-2550, 2010.
Article in Chinese | WPRIM | ID: wpr-279403

ABSTRACT

<p><b>OBJECTIVE</b>To study the preparation of cantharidin entrapped non-ionic surfactant vesicle (noisome)and evaluate its quality.</p><p><b>METHOD</b>The niosome loaded with cantharidin was prepared using injection method by non-ionic surfactants as the carrier. An centrifugation separation method and HPLC analysis method of the cantharidin were established to detect the entrapment efficiency. The optimum preparation technology was established by a orthogonal experiment. The morphology, and particle size were studied to evaluate the preparation.</p><p><b>RESULT</b>The average size of niosomes were (209. 8 +/- 0.5) nm. The entrapment efficiency of the CTD-NS was (27.5% +/- 2.0%) and Zeta potential was (41.5 +/- 0.65) mV.</p><p><b>CONCLUSION</b>The preparation of cantharidin noisome by TweenA and SpanB is practicable and successful. These experiments can be the basement of developing targeting drug delivery system.</p>


Subject(s)
Cantharidin , Chemistry , Chromatography, High Pressure Liquid , Drug Delivery Systems , Liposomes , Chemistry , Particle Size , Surface-Active Agents
15.
China Journal of Chinese Materia Medica ; (24): 1503-1508, 2009.
Article in Chinese | WPRIM | ID: wpr-344594

ABSTRACT

<p><b>OBJECTIVE</b>To prepare silymarin nanosuspension and lyophilized power for enhancing the dissilution of poorly soluble drugs.</p><p><b>METHOD</b>The precipitation technique was adapted to produce the silymarin nanosuspensions respectivly applying Tween 80, SDS and Poloxamer188 as stabilizers. The lyophilized formula contained 5% mannitol as cryoprotectant. Particle size, Polydispersity index and Zeta potential were detected by Mastersizer nano ZS (Malvern England). Morphological character was observed with Transmission Electron Microscopy. The product's structure was performed with X-ray diffractometer.</p><p><b>RESULT</b>The silymarin nanosuspension was successfully prepared, in which the drug particle size was about 100-300 nm,and the particles had ball-like shape and good dispersive properties.</p><p><b>CONCLUSION</b>This study provided potential for the neotype dosage form development of the Chinese Traditional Medicine.</p>


Subject(s)
Chemistry, Pharmaceutical , Methods , Freeze Drying , Nanoparticles , Chemistry , Particle Size , Silymarin , Chemistry , Solubility , Suspensions , Chemistry
16.
China Journal of Chinese Materia Medica ; (24): 2332-2335, 2008.
Article in Chinese | WPRIM | ID: wpr-283830

ABSTRACT

<p><b>OBJECTIVE</b>To optimize the process of extracting effective constituents from lotus leaf.</p><p><b>METHOD</b>Independent variables were ethanol concentration reflux time and solvent fold, dependent variables were extraction rates of nuciferine and flavone in lotus leaf, central composite design and response surface methodology were used for optimization of extraction of lotus leaf.</p><p><b>RESULT</b>The optimum conditions of extraction process were 75% -80% ethanol, 2-3 hours for reflux, 20-25 fold solvent and 2 times for extraction. Bias between observed and predicted of rates of nuciferine and flavone values were 5.53%, -6.02%, respectively.</p><p><b>CONCLUSION</b>The values observed and predicted were close to each other, which proved that the optimization of of extraction of lotus leaf by central composite design and response surface methodology was reasonable and successful.</p>


Subject(s)
Aporphines , Chemistry , Flavones , Flavonoids , Chemistry , Lotus , Chemistry , Plant Leaves , Chemistry , Reproducibility of Results
17.
China Journal of Chinese Materia Medica ; (24): 683-687, 2007.
Article in Chinese | WPRIM | ID: wpr-283408

ABSTRACT

<p><b>OBJECTIVE</b>To prepare tuizhang gel to cure cataract, the characteristics of Tuizhang gel on the drug-releasing in vitro were evaluated by compared with Tuizhang oculentum.</p><p><b>METHOD</b>The emodin and chrysophanol in the releasing mediator were determined by HPLC, and the drug releasing characteristics of Tuizhang gel and Tuizhang oculentum were studied by bag filter method.</p><p><b>RESULT</b>The emodin and chrysophanol in Tuizhang gel released (98.3, 1.1)%, (95.8, 1.8)% within 24 hours, respectively, while those in tuizhang oculentum released (10.62, 0.7)%, (10.46, 0.4)%, respectively. The emodin and chrysophanol in Tuizhang gel released more quickly and completely than in Tuizhang oculentum, so Tuizhang gel has enhanced the bioavailability.</p><p><b>CONCLUSION</b>The Tuizhang gel is characterized by slow-release to some degree, and it shows a promising future on ophthalmic drug delivery.</p>


Subject(s)
Acrylic Resins , Chemistry , Anthraquinones , Chemistry , Pharmacokinetics , Delayed-Action Preparations , Chemistry , Pharmacokinetics , Drugs, Chinese Herbal , Chemistry , Pharmacology , Emodin , Chemistry , Pharmacokinetics , Gels , Ointments , Plants, Medicinal , Chemistry , Solubility , Technology, Pharmaceutical , Methods
18.
China Journal of Chinese Materia Medica ; (24): 721-723, 2003.
Article in Chinese | WPRIM | ID: wpr-282258

ABSTRACT

<p><b>OBJECTIVE</b>To study in vitro dissolution rate of geniposide in Huangqin Qingfei dispersible tablet.</p><p><b>METHOD</b>A reversed-phase HPLC method was developed for determination of geniposide. In vitro dissolution rates were compared between Huangqin Qingfei dispersible tablet and conventional tablet in the dissolution medium of pH 1.0, 2.85, 4.5, 6.8, and 8.0 accordingly. Zero-class model, single-index model, logarithm normal school model, and Weibull distributing model were used to simulate the dissolution curve.</p><p><b>RESULT</b>The dissolution rate of two tablets is not affected by pH so much, and they can dissolve within 5 to 10 minutes. Weibull distributing model is the best simulation for in vitro dissolution. Comparing with conventional tablet, dispersible tablet dissolve quickly and completely.</p><p><b>CONCLUSION</b>The in vitro dissolution rate of geniposide in Huangqin Qingfei dispersible tablet conforms to Weibull distributing model. The dispersible tablet is able to release rapidly.</p>


Subject(s)
Chromatography, High Pressure Liquid , Drug Combinations , Drugs, Chinese Herbal , Chemistry , Gardenia , Chemistry , Iridoids , Kinetics , Plants, Medicinal , Chemistry , Pyrans , Scutellaria , Chemistry , Solubility , Tablets , Chemistry , Time Factors
19.
China Journal of Chinese Materia Medica ; (24): 507-508, 2003.
Article in Chinese | WPRIM | ID: wpr-266761

ABSTRACT

<p><b>OBJECTIVE</b>To find the best condition of the preparation technology of Flos Magnoliae essential oil-beta-cyclodextrin inclusion complex.</p><p><b>METHOD</b>L9(3(4)) table was used to examine the effects of 4 factors, and the inclusion rate of each test was determined of orthogonal test.</p><p><b>RESULT</b>The best condition was:oil:beta-cyclodextrin:water = 1:8:60 (mL:g:mL), stirring for 1 hour at 80 degrees C.</p><p><b>CONCLUSION</b>The complex prepared on the condition aforementioned is stable and stirring has a highest inclusion rate.</p>


Subject(s)
Cyclodextrins , Drug Carriers , Drug Stability , Drugs, Chinese Herbal , Flowers , Chemistry , Magnolia , Chemistry , Oils, Volatile , Plants, Medicinal , Chemistry , Technology, Pharmaceutical , Methods , beta-Cyclodextrins
20.
China Journal of Chinese Materia Medica ; (24): 28-30, 2002.
Article in Chinese | WPRIM | ID: wpr-263649

ABSTRACT

<p><b>OBJECTIVE</b>To evaluate different methods by treating water-decocted liquid of 6 Chinese medical herbs and 4 co-prescription respectively with alcohol, ultrafilter, macroporousresin and clarifier.</p><p><b>METHOD</b>The contents of target component in those extracts were determined with HPLC or titration, and quantitative and qualitative determination of the impurity components, such as polysaccharide and protein, was made.</p><p><b>RESULT</b>Each method showed its advantages and disavantages.</p><p><b>CONCLUSION</b>Different method can be chosen according to the clinical and preparation demands or the characteristic of components.</p>


Subject(s)
Drug Combinations , Drugs, Chinese Herbal , Methods , Plants, Medicinal , Chemistry , Polysaccharides
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