OBJECTIVE: To establish a method for determining the entrapment efficiency of gemcitabine hydrochloride liposomes(GHL).METHODS: The liposome and the free gemcitabine hydrochloride were separated by ultrafiltration,and the content of free gemcitabine hydrochloride was determined by HPLC.The entrapment efficiency of gemcitabine hydrochloride liposomes was computed as well.RESULTS: The recovery rate in ultrafiltration methods was 97.8%～100.1% for blank substance versus 99.0%～100.1% for sample.The linear range of gemcitabine hydrochloride was 1.0～80.0 mg?L-1(r=0.999 3) and its average recovery rate was 98.7～101.2%,and its inter-day and intra-day RSD were all less than 3% and its average entrapment efficiency was 81.21%.CONCLUSION: The method is simple,accurate and applicable for the determination of the entrapment efficiency of gemcitabine hydrochloride liposomes.

OBJECTIVE:To prepare and characterize lansoprazole(LAP) cationic liposomes. METHODS:Liposomes were prepared by ethanol injection technique.An orthogonal test was utilized to optimize the formulation and preparation of LAP liposomes.The encapsulation efficiency was determined by ultrafiltration.The morphological examination of LAP liposomes was performed using transmission electron microscopy.The particle size and Zeta potential of the liposomes were measured.The release rate of LAP from liposomes was tested. RESULTS:The liposomes with spherical or ellipsoidal shape and better stability featured the encapsulation efficiency of(80?1.23)%,the mean partical size of (184?21)nm,and Zeta potential of (36.1?5)mV.The release kinetics in vitro obeyed first-order equation.The stability of LAP was better. CONCULSION:The selected formulation and preparation technic of lansoprazole liposomes were rational and stable and liposomes featured a sustained release in vitro.

BACKGROUND:Total knee arthroplasty for knee osteoarthritis accompanied with extra-articular deformity is stil chal enging. An individual replacement plan should be designed to obtain good mechanical axis and to recover suitable soft-tissue balance. OBJECTIVE:To observe the safety and feasibility of individual y designed one-stage total knee arthroplasty for knee osteoarthritis combined with ipsilateral femoral extra-articular deformity. METHODS:A total of eight patients with knee osteoarthritis combined with ipsilateral femoral extra-articular deformity were enrol ed in this study. According to preoperative plan, five patients underwent intra-articular compensatory osteotomy, and the remaining three received extra-articular corrective osteotomy. Multi-planar deformities as wel as soft-tissue conditions were recorded. Main outcome measures included the hospital for special surgery score, Western Ontario and McMaster Universities Arthritis Index score and alignments deviation. RESULTS AND CONCLUSION:The patients were averagely fol owed up for 29 months. The hospital for special surgery score changed from preoperative 32.5 points to postoperative 87.5 points. The Western Ontario and McMaster Universities Arthritis Index score was increased from preoperative 37.1 points to postoperative 88.8 points (P<0.05). Mean mechanical axis deviation (either varus or valgus) changed from preoperative 17.1° to postoperative 1.4° (P<0.05). Al cases with extra-articular corrective osteotomy healed within 3 months, and none had postoperative infection, loosening or venous thromboembolic events. One patient was with 5° residual knee anti-sheets. Results verified that one-stage total knee arthroplasty procedures are effective in the treatment of knee osteoarthritis accompanied with ipsilateral femoral extra-articular deformity in accordance with individual preoperative plan.

Objective To prepare a harmine hydrochloride liposome formulation with high encapsulation efficiency. Methods Preformulation investigation was carried out to obtain the drug physicochemical properties such as solubility and lgD in buffers of different pH value. Harmine hydrochloride was encapsulated into liposomes by active loading method. Encapsulation efficiency of liposomes was determined after the free drug was separated from liposome by ultrafiltration. The influence factors on the encapsulation efficiency including drug-lipid weight ratio, incubation temperature, pH value of external water phase were investigated. Results As the pH value increasing, the solubility of harmine hydrochloride was decreased, while the apparent oil-water distribution coefficient was increased. By active loading method, the encapsulation efficiency could be over 80% when the drug to lipid weight ratio was under 1∶5. The pH gradient between intervesicle and intravesicle obviously influenced the encapsulation efficiency, while incubation temperature had little effect on encapsulation efficiency. Conclusion Active loading is suitable for preparing harmine hydrochloride liposome with high encapsulation efficiency.

OBJECTIVE: To investigate the effect of poloxamer 188 as co-emulsifier on the pharmaceutical property of emulsion.METHODS: Diclofenac sodium was used as model drug and poloxamer 188 as co-emulsifier,the emulsion was prepared by high pressure homogen-colostrum pH adjusting method,with its entrapment efficiency,particle size,?-electric potential etc determined.RESULTS: The emulsion which was added with poloxamer 188 showed decreased entrapment efficiency and ?-electric potential but increased particle size as comapred with the one without poloxamer 188.CONCLUSION: The pharmaceutical property of emulsion wouldn't necessarily be enhanced by adding poloxamer 188 as co-emulsifier.

OBJECTIVE:To develop a method for determining the entrapment efficiency of tetracaine hydrochloride liposome.METHODS:The microcolumn centrifugation was adopted to separate the free tetracaine hydrochloride from liposomes;the content of tetracaine hydrochloride was determined by HPLC and the entrapment efficiency was computed.RESULTS:By microcolumn centrifugation,the liposomes and the free tetracaine hydrochloride were well-separated.The recovery rate of the blank liposomes was 90.4%～100.1%;the absorption rate of free tetracaine hydrochloride was 96.6%～99.2%;and the entrapment efficiencies of tetracaine liposomes stood at about 80%.CONCLUSION:This method established for determining the entrapment efficiency of tetracaine hydrochloride liposome is simple,rapid and reproducible.

OBJECTIVE:To study the effect of oil phase,emulsifier and drugs on reverse microemulsion.METHODS:Pseudo-ternary phase diagram was adopted to study the effect of Span-80/Tween-80(emulsifier),thymopentin(model drug), long-chain glyceride,medium-chain glyceride,non-glyceride(oil phase).on the preparation of reverse microemulsions.Optimal formula of reverse microemulsions was selected.RESULTS:The largest water-in-oil(W/O)area was obtained in reverse microemulsion which was prepared using medium-chain glyceride as oil phase.Final formula was confirmed and contained distilled water/ Span-80/Tween-80/caprylic/capric triglyceride(2∶3∶6∶9).In addition,thymopentin was incorporated into the aqueous phase.CONCLUSIONS:The preparation of reverse microemulsions will be influenced by emulsifier,constitution of oil phase and drug.The influence factors for the actual preparation of reverse microemulsions should be optimized.

Objective:To summarize the clinical features, genetic testing and treatment efficacy of 6 children with Dent disease.Methods:Six children diagnosed with Dent disease in Guangzhou Women and Children′s Medical Center from January 2014 to March 2019 were enrolled.Their medical history, clinical manifestations, laboratory results, genetic test results, and proteinuria level, calciuria level and renal function after medication were measured.Results:All patients were male, with the onset age ranged from 1 to 9 years old.They were followed up for 6 months to 4 years.All the children had low molecular weight proteinuria.Urine protein electrophoresis showed that the ratio of low molecular weight proteinuria in only 2 cases was more than 50%.Renal biopsy suggested that all cases were combined with glomerular lesions.Five cases had hypercalciuria.Under the microscope, there were 5 cases of hematuria.Two case had rickets, and there was no renal calcium deposition and hypophosphatemia.Five cases were detected with CLCN5 mutations, of which p. C160Yfs*49 and p. G523D were first reported.One case had an OCRL1 mutation.Patients were treated with Hydrochlorothiazide and angiotensin converting enzyme inhibitor (ACEI). The 24 h urinary calcium level after treatment was lower than that before treatment [0.40 (0.24, 0.43) mmol/kg vs.0.12 (0.11, 0.14) mmol/kg, U=2.00, P<0.01]. However, there was no significant decrease in the 24 h-urinary protein level before and after treatment [77.09 (62.41, 88.01) mg/kg vs.80.33 (66.03, 92.52) mg/kg, U=12.00, P>0.05]. Conclusions:Dent disease is mainly characterized by low molecular weight proteinuria, and some patients may not be associated with hypercalciuria.Gene tests help to identify the disease type.ACEI and Hydrochlorothiazide can reduce the urinary calcium level, but cannot improve the level of urinary protein.

Objective To assess efficacy, infection rate and recurrence rate of tacrolimus prescribed in infants with steroid-resistant nephrotic syndrome (SRNS). Method From August 2011 to August 2014, 22 cases of SRNS infants (treatment group) received oral tacrolinms treatment, 0.1 to 0.15 mg/ kg per day and once every 12 hours were enrolled in this retrospective longitudinal study and were compared with 23 cases infant SRNS (control group) treated with high-dose methylprednisolone pulse therapy. Followed up for 1 year we analysed the data of proteinuria, lymphocyte count, proteinuria relapse and complication (infection, hyperglycemia) of the two groups’ patients at every point time. Results The pathology of the patients maintains of MCD, MsPGN, FSGS and IgM nephropathy so on. Follow-up to 6 months, the total remission rate 95.45% of treatment group was significantly higher than that in control group (60.87%). Follow-up to 6 months , 24 h urinary protein of the treatment group were respectively 67.88 mg/(kg·d) which were remarkably lower than base line [657.5 mg/(kg·d)], meanwhile which were obviously lower than the 6th month point of control group [305.55 mg/(kg·d)]. Lymphocyte counts had been done during the initial and the destination in the treatment group. Follow-up to 12 months, the CD4+ 795.16/uL, CD8+ 496.85/uL, CD19+ 358.23/uL had decreased observably than when at origin what was 2697.45/uL, 2265.63/uL, 1579.34/uL. Followed-up 1 year, the person-time of infection of treatment group existed superior to the control groups; The recurrence rate was 71.43% in treatment group, which compared with control groups (60.87%) without no significant difference. The treatment group with BG and CCr maintained stably. Conclusion Tacrolimus show its own advantages of reliable effect and less side-effect on the infant with steroid-resistant nephrotic symdrome associated with genes , but it could not lessen the relapse of the disease, and it′s long-term prognosis is still not very clear.

BACKGROUND:Clinical work shows that there are a large proportion of patients suffering from osteoerthritis(OA)and osteoporosis(OP),therefore establishing OA+OP models to simulate the clinical disease in postmenopausal women addreasing the basic characteristics of lesions,will offer better prevention and treatment of OA+OP in clinical practice.OBJECTIVE:To attempt to create OA+OP animal model.DESlGN,TIME AND SETTING:Randomized controlled animal expedment in terms of call pathology was perforrned between August 2008 and January 2009 in the Scientific Research Center and Traditional Chinese MediciRe Hospital of Xinjiang Medical University.MATERIALS:Forty 4-month-old female SD rats,weighing(210±10)g,were randomly divided into normal control group,OA group,OP group,OA+OP group.METHODS:In the OA+OP group,rats underwent abdominal incision 1.5 cm longitudinal on both sides of lumbar spine on back,followed by bilateral ovarian resection and ovarian artery ligation,to establish OP models.One month after the skin incision,left knee skin,subcutaneous tissue and fascia were cut,then joint capsule was given a vertical incision.Anterior cruciata ligament was cut off in orthophoria,meniscus was removed,followed by subcutaneous tissue and skin suture,OA model was prepared and placed under warm environment.antibiotic subcutaneous injection for 3 days,and the displacement of one month.OA group and OP group were produced in accordance with the above method of OA.OP model.Normal control rats received no treatment.MAIN OUTCOME MEASURES:When the rats were 6 months old,the left knee femoral condyle articular cartilage were examined by light microscopy and electron microscopy,left femur was used to measure proximal femoral bone mineral density.RESULTS:In three groups of model rats,articular cartilage become thinning and degeneration.In the OP model group and OA+OP model group,trabecular was sparse and arranged in disorder.In the OA model group and OA+OP model group,the incision layer was chiefly deleted,transferring layer was greatly injured,call hypertrophy and colony were observed,a large amount of blood capillary invaded into cartilage and calcification layer,even break through tidal line;in OP model group,incision layer of articular cartilage became thinning and appeared bilateral tidal line.In the OA model group and OA+OP model group,knee condylar number of special-shaped cartilage cells increased,manifested as irregular nuclei,reduced cell organelle,nuclear shnnkage,chromatin uneven distdbution,mitochondrial swelling,rough expansion of endoplasmic raticutum,accumutation of cytoplasmic microfilaments,showing lipid droplets and glycogen granules,gliel fibdllary fracture,disorder arrangement,a large number of cartilage calls were apoptotic.Three groups of model rats exhibited a dramatically decreased bone mineral density compared with control rats(P＜0.05).CONCLUSION:The animal modal of OA+OP was successfully established.