Improvement effects of tilianin on atherosclerosis model mice and its mechanism study / 中国药房

OBJECTIVE To s tudy the impr ovement effects of tilianin on the atherosclerosis （AS）model mice and its potential mechanism. METHODS Eight C 57BL/6J mice were taken as the normal group. Forty ApoE－/－ mice were randomly divided into model group ，tilianin low-dose ，medium-dose and high-dose groups [ 2.1，3.5，7.0 mg/（kg·d）] and simvastatin group [positive control drug ，3.5 mg/（kg·d）]，with 8 mice in each group. Normal group was given normal diet ，and other groups were given high-lipid diet to induce AS model. At the same time ，normal group and model group were given normal saline intragastrically ， administration groups were given relevant drug intragastrically ，once a day ，for 12 consecutive weeks. The levels of TC ，TG， LDL-C，HDL-C，Ox-LDL，IL-1β，IL-6，MCP-1 and TNF-α in plasma were determined. The pathomorphological changes of the aorta in mice were observed. The positive rate of ICAM- 1，VCAM-1 and PCNA in the aorta were determined. mRNA expressions of MMP- 2，MMP-9，TGF-β1，Smad2 and Smad 3 as well as protein expressions of TGF-β1，Smad2/3 and p-Smad 2/3 were also determined in aorta of mice. RESULTS Compared with normal group ，the plasma levels of TC ，TG，LDL-C，Ox-LDL，IL-1β， IL-6，MCP-1 and TNF-α in model group were increased significantly（P＜0.01），while HDL-C level was significantly reduced （P＜0.01）. Lipid plaques were formed in the aorta ，and the plaque area was large and caused severe stenosis of the lumen. mRNA expressions of MMP- 2，MMP-9，TGF-β1，Smad2 and Smad 3 as well as positive rate of ICAM- 1，VCAM-1，PCNA and protein expression TGF-β1，Smad2/3，and p-Smad 2/3 in the aorta were significantly increased （P＜0.01）. Compared with model group ， most of above indexes of medication groups were improved significantly （P＜0.05 or P＜0.01）. CONCLUSIONS Tilianin can inhibit the activation of TGF-β1/Smads signaling pathway and then inhibit the proliferation of vascular smooth muscle cells ，reduce ， inflammation and regulate lipid metabolism to inhibit the No.81960766） formation of AS.

Study on the content determination method of five active components and fingerprints of Yixin badiran jibuya granules / 中国药房

OBJECTIVE To establish the method for t he content determination of 5 active components in Yixin badiran jibuya granules and their fingerprints. METHODS High performance liquid chromatography method was adopted to determine the contents of luteolin- 7-O-β-D-glucuronide（LG），apigenin-7-O-glucuronide（APG），rosmarinic acid （RA），diosmetin-7-O-β-D-glucuronide （DG）and tilianin （TL）in 10 batches（No. S 1-S10）of Yixin badiran jibuya granules. The fingerprints of 10 batches of Yixin badiran jibuya granules were drawn by Similarity Evaluation System of Chromatographic Fingerprint of Traditional Chinese Medicine（2004 A edition ），and similarity evaluation and cluster analysis were also performed. RESULTS The contents of LG ， APG，RA，DG and TL in 10 batches of Yixin badiran jibuya granules were 0.279 5-0.449 9，0.082 4-0.135 3，0.184 8-0.472 1， 0.149 0-0.332 6，0.311 2-0.623 3 mg/g，respectively. A total of 13 common peaks were demarcated in the fingerprints and were identified as LG （peak 2）APG（peak 6），RA（peak 7），DG（peak 8），TL（peak 11）. The similarity ranged from 0.598 to 0.990. The results of cluster analysis showed that S 6-S10 were clustered into one category and S 1-S5 were clustered into one category. CONCLUSIONS Established method for content determination and fingerprints can be used for the quality control for Yixin badiran jibuya granules.

Study on Protective Mechanism of Dracocephalum moldavica Total Flavonoids against Myocardial Ischemia- reperfusion Injury in Rats Based on AMPK/SIRT 1/PGC-1α Signaling Pathway / 中国药房

OBJECTIVE：To s tudy the effects of Dracocephalum moldavica total flavonoids （TFDM）on AMPK/SIRT 1/PGC-1α signaling pathway ，and to explore the mechanism of its protective effect on myocardial ischemia reperfusion injury （MIRI）rats. METHODS：Totally 50 healthy male SD rats were randomly divided into sham operation group ，model group ，TFDM group [ 60 mg/（kg·d），by extract] ，Compound C+TFDM group [ig administration of 60 mg/（kg·d）TFDM+intravenous injection of 250 μg/kg Compound C（AMPK inhibitor ）via tail vein 15 min before reperfusion] ，EX-527+TFDM group [ig administration of 60 mg/ （kg·d）TFDM+ip injection of 5 mg/kg EX- 527（SIRT1 inhibitor）20 min before reperfusion] ，with 10 rats in each group. They were given relevant medicine intragastrically ，once a day ，for consecutive 7 days. After last ig administration ，sham operation group underwent sham operation ，other 4 groups were established MIRI model by ligating left anterior descending coronary artery ， ischemia for 30 min and reperfusion for 2 h. After reperfusion ，the myocardial histopathological changes were observed by HE staining；RP-HPLC method was used to determine the contents of ATP ，ADP，AMP and NAD + in cardiac tissue. mRNA expressions of AMPK ，SIRT1 and PGC- 1α were detected by quantitative real-time PCR assay. Western blotting assay was the expressions of SIRT 1 and PGC- 1α protein in myocardium. RESULTS： Compared with sham operation group ， model group showed myocardial fib ers arranged disorder and horizontal stripes disappearance ，cell swelling burst and necrosis ，and nuclei deformation displacement ；the contents of ATP and NAD+，mRNA expression of AMPK ，SIRT1 and PGC- 1α，protein expression of SIRT 1 and PGC- 1α in cardiac tissue were decreased significantly （P＜0.05 or P＜0.01）；the contents of ADP and AMP ，the phosphorylation level of AMPK protein were increased significantly （P＜0.01）. Compared with model group ，myocardial pathological morphology were improved significantly in TFDM group ；the contents of ATP and NAD + in cardiac tissue ，mRNA expression of AMPK ，SIRT1 and PGC- 1α，the phosphorylation level of AMPK protein ，the protein expression of SIRT 1 and PGC- 1α were increased significantly（P＜0.05 or P＜ 0.01），while the contents of ADP and AMP were decreased significantly （P＜0.01）. Compared with TFDM group ，improvement effects of Compound C + TFDM group and EX- 527 + TFDM group on above indexes were reversed （P＜0.05 or P＜0.01）. CONCLUSIONS：TFDM may play a protective role on myocardium by activating AMPK/SIRT 1/PGC-1α signaling pathway and regulating energy metabolism.

Study on Influencing Factors of the Tip Softness of Epidural Anesthesia Catheter / 中国医疗器械杂志

This article aims to study the factors affecting the flexibility of the tip of an epidural anesthesia catheter. The flexibility of the tip of the epidural anesthesia catheter was tested with a softness tester from four aspects:raw materials, tip structure, tip processing technology, and the outer diameter of the catheter. Highly flexible and malleable polymer material with a smooth tip, the tip softening process and the proper outer diameter can effectively improve the tip flexibility of the epidural anesthesia catheter.

Study of left ventricular torsional mechanics in patients with premature ventricular complexes from right ventricular outflow tract / 中华超声影像学杂志

Objective To assess alternations in left ventricular( LV) torsion parameters in healthy subjects and patients with premature ventricular complexes ( PVCs) from the right ventricular outflow tract (RVOT) .Methods ThirtypatientswithPVCsfromRVOTand31healthysubjectswereincluded.Two-dimensional speckle tracking imaging( 2D-STI) was applied to evaluate LV torsion parameters ,including LV rotational degrees in basal and apical levels respectively ,LV total torsional degrees ,and time to peak rotational and torsional degrees . All values of patients with PVCs were recorded during both sinus beats ( PVC-S) and premature ventricular beats ( PVC-V) . Results No significant difference was observed in left ventricular ejection fraction(LVEF) between PVC-S group and control subjects( P > 0 .05) ,while LV rotational degrees in apical levels[( 8 .47 ± 3 .54)° vs (9 .50 ± 3 .21)° , P = 0 .042] and LV total torsional degrees [ (11 .25 ± 6 .31)° vs (14 .00 ± 4 .07)° , P =0 .046] were significantly reduced in PVC-S group . In addition to the reduction of LV rotational degrees in apical levels[( 3 .93 ± 7 .23)° vs (9 .50 ± 3 .21)° , P =0 .000] and LV total torsional degrees[ ( 4 .35 ± 9 .62)° vs (14 .00 ± 4 .07)° , P =0 .000] ,lower apical levels[ ( -0 .57 ± 4 .44)° vs ( -5 .26 ± 3 .84)° , P =0 .000] and advanced LV rotational degrees [ ( 40 .5 ± 18 .6)％vs (48 .0 ± 9 .1)％ , P =0 .05] in basal levels were observed in PVC-V group in comparison with the control subjects . Compared with the PVC-S group ,PVC-V group showed lower LV rotational degrees in basal levels [ ( -0 .57 ± 4 .44)° vs ( -4 .57 ± 4 .57)° , P = 0 .000] and advanced time to peak rotational degrees [ (40 .5 ± 18 .6)％ vs (48 .1 ± 12 .6)％ , P =0 .018] ,as well as advanced time to peak and lower LV total torsionaldegrees[(39.3±15.4)％ vs(46.7±13.8)％ ,P =0.007 ;(4.35±9.62)°vs(11.25±6.31)°,P=0 .001] .Conclusions As to RVOT-PVC patients ,LV myocardial torsional motion has changed in PVC-S mainly manifested as a decrease of rotation degrees in apical levels even if the LVEF is still in the normal range . During PVC-V the rotation and twist degree is further reduced ,and the time sequence altered , accompanied with significantly decreased LVEF .

Influence of antlerbase on Notch2 gene expression and immune function of mice with thymic lymphomas induced by ionizing radiation / 吉林大学学报(医学版)

Objective:To investigate the effect of antlerbase on the radiation carcinogenesis by observing the effect of antlerbase on the expressions of Notch2 gene and immune function of the mice with thymic lymphomas induced by ionizing radiation.Methods:Ninety BALB/c mice were randomly divided into control group,irradiation group and irradiation combined with drug group (combined group)(n=30).The thymic lymphoma models of mice were made by X-ray irradiation in irradiation group and combined group;after establishing the animal models,the mice in combined group were fed with chow containing antlerbase superfine powder.After 6 months,the whole blood and thymic tissue were taken,then RT-PCR and Western blotting methods were used to detect the mRNA and protein expressions levels of Notch2 gene in the thymic lymphoma tissue;ELISA method was used to detect the serum immunoglobulin (IgG,IgA,IgM)levels and SOD kit was used to detect the serum SOD activities of the tumor mice.Results:The incidences of thymic lymphoma in irradiation group and combined group were 53.33%(16/30)and 36.67% (11/30),respectively.Compared with control group,the expression levels of mRNA and protein of Notch2 gene in thymic lymphoma of the mice in irradiation group were significantly increased (P <0.05);compared with irradiation group,the expression levels of mRNA and protein of Notch2 gene in combined group were decreased (P <0.05);compared with control group,the levels of IgG,IgA,and IgM in serum of the mice in irradiation group were decreased (P < 0.05 ); compared with irradiation group, the levels of IgG, IgM, hemoglobin and the activity of SOD in serum of the mice in combined group were increased (P < 0.05 ). Conclusion:Ionizing radiation can activate the high expression of Notch2 gene and protein and decrease the immune function of mice,it might be one of the mechanisms for the occurrence of radiation carcinogenesis;antlerbase can decrease the incidence of radiation carcinogenesis by inhibiting the expression of Notch2 gene and increasing the immune function of mice,which might play an role in restraining tumor.

Effect of hyperbaric oxygen treatment on the expression of FasL and caspase-3 in renal tissue after renal ischemia reperfusion injury / 中华肾脏病杂志

Objective To observe the effects of hyperbaric oxygen (HBO) on the expression of FasL mRNA and caspase-3 protein in renal tissue after renal ischemia-reperfusion injury (IRI) in order to elucidate the underlying mechanisms.Methods Rats were randomly divided into thrcc groups: sham group(n=8),IRI group(n=8) and IRI+HBO group(n=8).The IRI group and the IRI+HBO group recieved 45 minutes hibateral renal ischima and the IRI +HBO group received additional HBO therapy at the 1st,24th and 48th hour after ischemia.The kidneys were removed at the end of HBO therapy.Malondialdehyde (MDA) level and superoxide dismutase (SOD) activity were measured to determine the extent of oxidative stress.The expression of FasL mRNA and caspase-3 protein was detected by quantitative real-time PCR and immunohistochemical staining in renal tissue respectively.Results Compared with the sham group,MDA level increased markedly and SOD activity decreased markedly after ischemia.After HBO treatment,MDA level decreased and SOD activity increased significantly (P ＜0.05).In IRI group,the expression of FasL mRNA and caspase-3 protein were higher than those in the sham group (P＜0.01),which were reduced significantly by HBO treatment (P＜0.01).Conclusion The expression of FasL mRNA and caspase-3 protein increases along with the lasting of reperfusion and HBO exhibites protection against cell apoptosis through improving the antioxidant-oxidant balance and reducing IRI in acute stage of IRI.

Intestional absorption and mechanism of tiliani in Caco-2 cell model / 中国中药杂志

<p><b>OBJECTIVE</b>To observe the uptake of tiliani in Caco-2 Cell.</p><p><b>METHOD</b>A human intestinal epithelial cell model Caco-2 cell in vitro cultured was applied to study the kinetics of uptake, transport and efflux kinetics of tiliani at small intestine. The effect of time, pH, drug concentration and inhibitors on the uptake of tiliani were investigated. The determination of tiliani was performed by HPLC.</p><p><b>RESULT</b>Tiliani in Caco-2 cell uptake was time-dependent. Tiliani in Caco-2 cell uptake was concentration-dependent at 4-16 mg x L(-1) consistent with passive diffusion process. The acid condition was good for the uptake of tiliani at pH 5-8. Compared with the control group, tiliani cell uptake was significantly higher after additional treatmeant with verapamil (1.545 +/- 0.010) mg x g(-1), (P < 0.05), and tiliani cell uptake was significantly lower after additional treatmeanet with sodium azide (0.994 +/- 0.003) mg x g(-1) (P < 0.05), with 2,4-dinitrophenol (1.174 +/- 0.030) mg x g(-1) (P < 0.05), and with phloridzin (1.098 +/- 0.021) mg x g(-1) (P < 0.05). Compared with the control group, tiliani cell uptake was not significantly after additional treatmeant with lactose (1.470 +/- 0.025) mg x g(-1), Papp of Basolateral to Apical was much more than that of Apical to Basolateral (1.10 Fold).</p><p><b>CONCLUSION</b>P-glycoproteins and SGLT1 participate in the conveying process of tiliani in Caco-2 cells. The uptake of tiliani has no relationship to LPH. passive transport and carrier-mediated transport participate in the uptake process of tiliani in Caco-2 cells.</p>

Experimental study of dexamethasone in the prevention of delayed encephalopathy after carbon monoxide poisoning / 中华急诊医学杂志

Objective To investigate the curative effects of dexamethasone in the prevention of delayed encephalopathy after acute carbon monoxide poisoning in the rats.Methods Eighty healthy male Wistar rats were randomly(random number)divided into hyperbaric group(H),dexamethasone group (D),combined treatment group(C)and model control group(M)after carbon monoxide poisoning,twenty rats in each group.Twelve air-modeling rats were selected as normal control group(N).Using eight-arm maze training and testing,the rat's function of cognitive and memory was detected.The serum MBP levels were detected by enzyme-linked immunosorbent assays(ELISA).Magnetic resonance imaging was used for observing the demyelination of the head and the morbidity of delayed encephalopathy.Measured data was analyzed with single factor analysis of variance(one-way ANOVA).Results The result of eight-arm maze showed that there were 6,7,1,1 rats with delayed encephalopathy in groups M,H,C,D,respectively.At 3 days after poisoning,except N group,the serum MBP levels of every groups increased significantly.At 10 days after poisoning,serum MBP levels in groups C and D were significantly decreased,then returned to normal levels at day 18.The serum MBP in groups M and H was higher than normal levels at all the time.Head MRI showed except D group,the rest groups were abnormal signals,which appeared 7 in M group,6in H group and 1 in C group.Conclusions Dexamethasone administrated as soon as possibly after acute carbon monoxide poisoning may reduce the serum MBP levels,prevent demyelination occurs,decrease the pathological damage,eventually play a preventive role in DE.

Formulation optimization of gel matrix of Saussurea involucrate by orthogonal design / 中国中药杂志

<p><b>OBJECTIVE</b>To optimize the formulation of gel matrix of Saussurea involucrate.</p><p><b>METHOD</b>The formulation of gel containing carbopol, azone, trimethylene glycol and alcohol was optimized by orthogonal design with evaluation indexes such as consistency in room temperature, consistency of average temperature of skin, yield value and rheopexy in room temperature.</p><p><b>RESULT</b>The optimal proportion of matrix components was made from carbopol-azone-trimethylene glycol-absolute alcohol (2. 0: 2. 0:15.0 : 30.0).</p><p><b>CONCLUSION</b>The optimal formulation of S. involucrate gel based the optimal formulation is well-distributed and transparent, it has proper consistency and well rheopexy.</p>

Optimization of extraction process for compund kaliziran gel with orthogonal design / 中国中药杂志

<p><b>OBJECTIVE</b>To optimize the extraction process of compund kaliziran gel.</p><p><b>METHOD</b>Orthogonal design was used to optimize the extracting process of eight herb medicines with the extract yield, the content of psoralen, isopsoralen and osthole as indexes, and to optimize the extracting process of Polygonum multflorumi and Seman sinapis albae with the extract yield and the content of 2,3,5,4'-tetrehydroxy-stilbene glucoside as indexes.</p><p><b>RESULT</b>The optimum extraction progress was as follows:eight herb medicines were extract 2 times for 1 hour with 8 times of 60% alcohol; P. multflorumi and S. sinapis albae were extract 2 times for 1 hour with 8 times of 40% alcohol.</p><p><b>CONCLUSION</b>The optimum extraction processes are stable and feasible.</p>

Optimized formulation of alkanin liposome by a combination of orthogonal design with central composite design/response surface method / 中成药

AIM:To select an optiomal formulation of liposome entrapped alkanin prepared with ethanol injection in the combination of orthogonal design and central composite design/Response surface method.METHODS:Five influencing factors,including ratio of alkanin to liposome and soyabean lecithin to cholesterol,volume ratio of ethanol phase to water phase,soybean concentration and mannitol concentration were chosen as indices by orthogonal design.Then the method utilized the central composite design,which fitted multivariate linear and second/third order nonlinear regression equation,to find out the optimal formulation.RESULTS:Third order regression equation gained made the good prediction about entrapment(85.4%)and alkanin load(5.16%),and exhibited no significant difference between theoretic value and measured value.CONCLUSION:The combination of orthogonal design with central composite design is a feasible and convenient method to optimize the prescription of alkanin-liposome.

Effect of several penetration enhancers on transdermal absorption in vitro of syringin, chologenic acid and rutin in Xuelian cataplasm / 中国中药杂志

<p><b>OBJECTIVE</b>To study the effects of different penetration enhancers on the transcutaneous permeability of syringin, chologenic acid and rutin in Xuelian cataplasm in vitro and to determine the effective enhancer.</p><p><b>METHOD</b>Using improved Franz-type diffusion cell and excised big mouse skin in vitro as transdermal barrier, the kinetics parameters of syringin, chologenic acid and rutin in Xuelian cataplasm such as cumulative permeation quantity, permeation rate were determined by HPLC. The enhancement ability of azone (A-zone), propylene glycol (PG) was investigated when used either uniquely or combinatively.</p><p><b>RESULT</b>With the 7% azone, the syringin, chologenic acid and rutin in Xuelian cataplasm could penetrate through the skin of rats well.</p><p><b>CONCLUSION</b>The selection of the best penetration enhancers provide reference for Xuelian cataplasm.</p>

Determination of tanshinone Ⅱ A in Compound Dangguifukang Capsule by RP-HPLC / 中成药

AIM: To establish a HPLC method for the determination of tanshinone Ⅱ A in Compound Danguifukang Capsule. METHODS: Analytic column: Reliasil C18(5μm, 250mm×4.6mm), protective column: (5μm, 12.50mm×4.6mm); mobile phase: methnaol-ultrapure water (80: 20); detective wavelength was at 270a good linearity within the range of 1×10-2-0.16μg, r=0.9995. The average recovery was 99.73% and RSD was 2.91%. CONCLUSION: The method is feasible, and simple to operate and suitable for the quality control of Compound Dangguifukang Capsule.

Study on the Quality Standard of Weile Capsule / 中国药房

OBJECTIVE:To establish the quality standard of Welie capsule METHO DS :Fritillary bulb,rhizoma corydalis and magnolia bark in the capsule were ident ified with TLC;the contents of berberine hydrochloride was determined with TLC scanning RESULTS:Fritillary bulb,magnolia bark and rhizoma corydalis could be tested out in TLC chromatogram;berberine hydrochloride appeared good linear re lationship in the range of 0 1～1 0?g,r=0 9 991;and the average recovery w as 97 84%,RSD=2 86%(n=5) CONCLUSION:This method can be used to control the quality of Weile capsule

Quantitative Determination of Emod in and Chrysophanic Acid in Compound Rhubarb Spray by RP -HPLC / 中药新药与临床药理

Objective To establish a method for the determi nation of emodin and chrysophanic acid in Compound Rhubarb Spray by HPLC.Methods The ODS column was applied.methanol∶water(87∶13)served as mobile phase.The detectio n wavelength was at 254nm and the flow r ate was 0.65ml /min.Results The average recovery of emodin was 99.48%with relative standard deviation being 1.75%(n=9)and the average recovery of chrysoph anic acid was 101.46%with rela-tive standard deviation being 2.85%(n=9).Conclusion The method was simple,rapid and reli able.It is suitable for the quality control of Compound Rhubarb Spray.

Comparative study of extraction on Rhubarb through multiple linear regression and range analysis / 中成药

Objective: To optimize the extraction process for Rhubarb. Methods: Colomrimetric analysis was used to measure the content of active ingredients; Besides, orthogonal design was applied to optimize the technologies of Rhubarb in comparision with two ways to deal with the experimental results. Results: The different optimum extraction processes can be obtained by different ways to deal with the experiment results but the same experiment results were found. Conclusion: The multivariate regression analysis can make up shortage of sense The equation of regression is more helpful for explanation of result and optimum of preparation technology.

Study on Preparation Procedure of Grub Eye Drops / 中成药

Objective: To establish the optimum preparation procedure for Grub Eye Drops. Methods: The amount of extract abtained from extraction solutions, the contents of glutamic acid and glycine, nitrogen content and TLC spots were used to evaluate the extraction procedure for Grub Eye Drops by orthogonal design. Results: The optimum extraction condition was A 3B 2C 1. That is adding ten times amount of water to soaking for 30min, decocting for 1.5h, filtering to obtain filtrate Ⅰ, adding seven times of water into filter residue, decocting for 1h to obtain filtrate Ⅱ, combining filtrate Ⅰ and Ⅱ. Conclusion: The experimental method is suitable for the productive preparation of Grub Eye Drops.

Optimized formulation of alkanin liposome by a combination of orthogonal design with central composite design/response surface method / 中成药

AIM:To select an optiomal formulation of liposome entrapped alkanin prepared with ethanol injection in the combination of orthogonal design and central composite design/Response surface method.METHODS:Five influencing factors,including ratio of alkanin to liposome and soyabean lecithin to cholesterol,volume ratio of ethanol phase to water phase,soybean concentration and mannitol concentration were chosen as indices by orthogonal design.Then the method utilized the central composite design,which fitted multivariate linear and second/third order nonlinear regression equation,to find out the optimal formulation.RESULTS:Third order regression equation gained made the good prediction about entrapment(85.4%) and alkanin load(5.16%),and exhibited no significant difference between theoretic value and measured value.CONCLUSION:The combination of orthogonal design with central composite design is a feasible and convenient method to optimize the prescription of alkanin-lipo-some.

Optimized formulation of resveratrol solid lipid nanoparticles by uniform design in combination with central composite design/response surface methodology / 中成药

AIM:To establish a method of optimizing the formulation of resveratrol solid lipid nanoparticles(SLN)quickly and accurately by uniform design in combination with central composite design and response surface.METHODS:Firstly,uniform design was used to optimize the main factors from the five influence factors such as entrapment efficiency,drug loading,average diameter,and PDI(Polydispersity Index).Then,on the ground of it,the main factors determined by unifrom design were optimized by central composite design with three evaluation parameters and response surfaces were nonlineated according to best-fit mathematic models,so optimized formulation was obtained.RESULTS:According to the optimal conditions,the entrapment efficiency,the drug loading,the average diameter and the PDI(Polydispersity Index)of the prepared Res-SLN were 56.77%,2.59%,167 nm and 0.176,respectively.CONCLUSION:The design of combination of uniform design with central composite design is a feasible and convenient method to optimize the prescription of Res-SLN.