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Objective@#To analyze the characteristics of the daily exercise load and the One Hour of Moderate to Vigorous Physical Activity (MVPA) per day among primary school students, so as to provide a reference for improving the quality of the physical activity of primary school students in school.@*Methods@#A total of 223 students from an elementary school in Beijing from May to June of 2023, were selected by stratified random cluster sampling method. The Polar Verity Sense heart rate arm band was used to monitor and evaluate the daily exercise load heart rate according to different grades, gender and physical quality.@*Results@#The average heart rate of primary school students in outdoor class, zero point sports, recess and indoor class was (130.01±13.11, 119.89± 16.02,109.96±8.11,96.81±7.89) times/min, respectively, and only 4.04% students met the standard of 1 hour MVPA daily. From the perspective of different grades, the MVPA time ratio of lower grade students in outdoor class, zero point sports and big break was 28.41%, 42.47% and 8.24%, that of middle grade students was 18.33%, 6.41% and 5.90%, and that of senior students was 45.91%, 3.88% and 11.43%. The number of students who achieved 1 hour daily MVPA was 5.41%, 0 and 6.67%. Time ratio of MVPA in outdoor classes, zero hour sports and big breaks accounted for 30.09%, 16.34% and 9.23% for boys, 31.70%, 16.24 % and 6.13% for girls, and the interval distribution of boys and girls who achieved MVPA for one hour per day was 5.88% and 2.86%.Time ratio of MVPA for students with excellent physical fitness were 33.19%, 21.76% and 8.25% in outdoor class, zero point sports and big break, while those with good physical fitness were 29.76%, 12.93% and 8.19%.A total of 21.78%, 5.99% and 4.80% of the students passed the physical fitness test, and the number of students with excellent, good and passed the physical fitness test who achieved the daily 1 hour MVPA was 5.88%, 3.77% and 0.@*Conclusion@#In the present study, elementary and middle school students time for in school physical activity was adequate, but there are problems of low loading intensity and insufficient time for MVPA. It is necessary to arrange targeted physical activity programs for students of different grades, genders and physical fitness levels to increase the daily exercise load of students in school.
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Premature constriction or closure of fetal ductus arteriosus usually occurs during late pregnancy, causing cardiac ventricular size disproportion (right and left heart asymmetry), which are usually clues for the diagnosis. We reported a case of a fetus with an enlarged right heart, reduced wall motion of the right ventricle, and severe tricuspid regurgitation identified by echocardiography at 37 +2 gestational weeks. Furthermore, the fetal ductus arteriosus was unclear on two-dimensional fetal echocardiography, and high-velocity flow was detected at the site by pulsed-wave Doppler, suggesting a significant premature constriction of fetal ductus arteriosus. The elective cesarean section was performed after the examination day. Three months postpartum examination showed no obvious abnormalities in the heart of the newborn.
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Objective:To study the in vitro transdermal permeability of nifedipine nanoemulsion ( NFNE) containing different per-meation enhancers to lay foundation for the development of transdermal nifedipine preparation. Methods: Franz diffusion cells were used to study the transdermal enhancement of NFNE with different transdermal enhancers ( Azone, oleic acid, TMC20, TMC40, TMC60). Results:The in vitro transdermal effect of NFNE was better than that of nifedipine (NF). The order of in vitro transdermal permeation enhancement was as follows: azone > oleic acid > TMC60 > TMC40 > TMC20, while the water-soluble transdermal permeation enhancers had faster effect. Conclusion:For NFNE, fat-soluble transdermal permeation enhancers have better effect.
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This paper aims to retrospectively analyze the nursing management of one-stop hybrid procedures and to sum up the clinical experience.The key point of successful implementation of nursing management of one-stop hybrid procedures lies in the layout of hybrid operation room,in the intraoperative nursing cooperation and the professional nursing personnel training,and in the establishment of a new talent training mode that contains flexible allocation mechanism of nursing human resources as well as short-term post rotation of professional nursing staff.The one-stop hybrid operation is a minimally-invasive procedure for the treatment of complex diseases.Scientific nursing management is the strong guarantee to ensure a successful “one-stop” hybrid operation.
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Objective To observe the application of allopurinol in the treatment of gouty nephropathy, and evaluate its clinical effect on the level of serum creatinine and urea nitrogen. Methods Patients with gouty nephropathy from April 2015 to May 2017 in Xining first people's hospital 126 patients as the research object, divided into observation group and control group of 63 cases with double blind random method, given the reference group of patients basic treatment, the observation group treated with allopurinol in the reference group on the basis, effects were compared between the two groups the clinical therapeutic effect and serum creatinine and blood urea nitrogen, blood pressure level. Results After 12 months of therapy, compared two groups of patients before treatment, serum uric acid, creatinine, blood urea nitrogen, blood pressure (systolic blood pressure, diastolic blood pressure) were improved, and the observation group was obviously better than that of control group (P<0.05); the observation group total efficiency of treatment group was 88.89％ (56/63), the reference group was 74.60％ (47/63), with significant difference between two groups (P<0.05). Conclusion Allopurinol can be used in the treatment of gouty nephropathy. It can help to improve the clinical effect and improve the clinical symptoms of the patients. It is of practical value.
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Objective To screen patients with clopidogrel resistance and develop accurate anti-platelet therapy strategies based on CYP2C19 gene polymorphism.Methods A total of 200 patients with acute coronary syndrome/percutaneous coronary angioplasty were selected.The pyrophosphate sequencing technology was using to detect CYP2C19 gene polymorphism for identifying clopidogrel poor metabolizers and guide antiplatelet therapy according to the development of clopidogrel resistance strategies.Results The proportion of patients with clopidogrel resistance (including intermediate metabolizers and slow metabolizers) was about 63.5%.In clopidogrel intermediate metabolizers, 41.4% cases were applied double dosages of clopidogrel and about 20.2% patients were given ticagrelor instead of clopidogrel.For clopidogrel slow metabolizers, approximately 39.3% cases were given doubled dosage of clopidogrel and 46.4% cases were given ticagrelor.Compared with previous data, the proportion of individual treatment of clopidogrel resistance was significantly increased in this study.Conclusion The strategies for the treatment of clopidogrel resistance, which based on the polymorphism of CYP2C19 gene, have been achieved initial success.
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Objective:To optimize the formula of nifedipine nanoemulsion (NFNE) to lay foundation for the development of nifedipine transdermal preparation.Methods:The content of nifedipine as the index,the compositions in the formula were screened out by single factor experiments,and then the formula of NFNE was optimized by orthogonal tests with the ratio of emulsifier to co-emulsifier,ratio of mixed emulsifiers to oil phase and the amount of water as the influencing factors.N-Trimethyl chitosan (TMC) was used as the transdermal enhancer.The formula of TMC-NFNE was optimized by orthogonal tests with the degree of quaternization of TMC,the concentration of TMC solution and the amount of TMC solution as the influencing factors.The quality evaluation of TMC-NFME was determined including appearance,type identification,particle size and drug content.Results:The optimal formula was as follows:7% ethyl oleate,32% Tween 80,16% alcohol,45%water and the mass ratio of TMC of 0.45%.The type of the emulsion was O/W.The content of NFNE,TMC20-NFNE,TMC40-NFNE and TMC60-NFNE was (12.76±0.22),(14.76±0.16),(12.26±0.18) and (12.92±0.27) mg·ml-1,respectively.The particle size was 13.62,17.10,16.26 and 17.25 nm,respectively.The morphology of the nanoemulsion was spherical.Conclusion:The optimal formula and preparation process of TMC-NFNE are simple with high drug content,which is worthy of further studies.
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Objective:To study the effect of Xihuang Capsule combined with GP regimen on the serum levels of tumor necrosis factor-oα (TNF-α),vascular endothelial growth factor (VEGF),matrix metalloproteinase-2 (MMP-2) and matrix metalloproteinase-9 (MMP-9) of patients with advanced breast cancer.Methods:88 patients with advanced breast cancer admitted in our hospital from March 2014 to February 2015 were selected and divided into the observation group and the control group according to the order of admission.The control group was treated by the GP program,the observation group was given Xihuang capsule combined with GP regimen.The serum levels of TNF-α,VEGF,MMP-2 and MMP-9 in the two groups were compared before and after treatment.The clinical efficacy and incidence of side effects were analyzed.Results:The total effective rate of observation group was significantly higher than that of the control group [84.09％ (37/44) vs 50.00％ (22/44)] (P＜0.05).There was no significant difference in the serum levels of TNF-α,VEGF,MMP-2 and MMP-9 between the two groups before treatment (P＞0.05).After treatment,the serum TNF-α,VEGF,MMP-2 and MMP-9 levels were significantly lower than those before treatment (P＜0.05).The serum levels of TNF-α,VEGF,MMP-2 and MMP-9 of observation group were significantly lower than those of the control group (P＜0.05).There was no significant difference in the incidence rate of nausea and vomiting between the two groups (P＞0.05).The incidence ofalopecia,diarrhea,abnormal liver function,decreased appetite,anemia and leukopenia in the observation group were significantly lower than those of the control group (P＜0.05).Conclusion:Xihuang Capsule combined with GP regimen could more effectively reduce the levels of serum TNF-α,VEGF,MMP-2 and MMP-9 of patients with advanced breast cancer than GP regime alone with higher safety.
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Objective:To compare the diagnostic value of strain ratio correction in ultrasound elasticity imaging and ultrasound-guided percutaneous biopsy for the diagnosis of breast imaging reporting and data system (BI-RADS) 4 breast mass. Methods:From January 2014 to June 2016 in the Affiliated Hospital of Chengde Medical College, 120 patients with breast tumor resection and preoperative BI-RADS4 of all the masses were included in this study. The diagnostic value of contrast ultrasound elastography strain ratio correction and biopsy in ultrasound-guided percutaneous biopsy was evaluated with pathology as the gold standard. Results:In the 120 cases of grade BI-RADS4 mass by ultrasound elastography after correction, 46 cases were graded BI-RADS4 without changing;59 cases were downgraded to BI-RADS3, and 15 cases were upgraded to BI-RADS5. The pathology, ultrasonic elastography strain ratio correction, biopsy diagnostic sensitivity, specificity, and accuracy were 90.7%, 81.8%, 85.5%, 88.8%, 98.5%, and 95.0%, respectively. A significant difference was found between ultrasonic elastography strain ratio correction and ultrasound-guided biopsy for the diagnosis of breast malignant mass (P0.05). Conclusion:Ultrasound-guided puncture biopsy is highly valuable in qualitative diagnosis of BI-RADS4 breast mass. After the pathological diagnosis, ultrasound elastography strain ratio has certain clinical value in BI-RADS4 guided biopsy and correction of mass classification.
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Objective To investigate the correlation between pelvic organ prolapse quantitation (POP-Q) indication points and the incidence of occult stress urinary incontinence (OSUI) and its impact on prognosis. Methods Retrospective study medical records of 93 patients with pelvic organ prolapse (POP) staged atⅢ-Ⅳ, of which underwent pelvic reconstruction operations with Prolift system from Jan. 2007 to Sept. 2012. None of these patients had clinical manifestations of stress urinary incontinence (SUI) before surgery, and in which 44 patients were included in study group (POP complicated with OSUI) because they were identified with OSUI, another 49 patients as control group (simple POP). Follow-up and collecting datas including POP-Q, stress test, urodynamic recordings, incidence of de novo SUI, statistic analyzing by logistic regression and receiver operating characteristic curve (ROC). Results (1) The study group had a much higher incidence of 30%(13/44) on de novo SUI than that of control group (4%, 2/49;P<0.01). (2) Vaginal delivery (OR=5.327, 95%CI:1.120-25.347), constipation (OR=5.789, 95%CI:1.492-22.459), preoperative OSUI (OR=13.695, 95%CI:2.980-62.944), anterior vaginal wall prolapse (OR=6.115, 95%CI:1.231-30.379) were identified as dependent risk factors for de novo SUI by logistic regression analysis. (3) For POP patients that complicated with OSUI, we chose a cutoff value of +1.5 cm for Aa point as the threshold to predicting incidence of de novo SUI according to ROC curve, area under the curve (AUC) was 0.889 (P<0.05), the sensitivity reached 88.9%and specificity was 73.9%. According to ROC curve of Ba point, a cutoff value of+2.5 cm was chosen as the threshold to predicting incidence of de novo SUI post-operation, it had a sensitivity of 66.7% and specificity of 82.6%, AUC was 0.766 (P<0.05). Conclusions Pre-operative OSUI is a dependent risk factor of de novo SUI for advanced POP patients. Aa and Ba points are correlated with preoperative OSUI, and it is worthy to be considered as a risk predictor on forecasting the incidence of de novo SUI post pelvic reconstruction surgery.
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Objective To investigate the effect of Guizhi Fuling pills on levels of serum MAPK, ERK and VEGF in patients with endometriosis. Methods 60 patients with endometriosis were selected and according to the random control table were divided into the experiment group and the control group, 30 cases each.The control group were treated with conventional acetate goserelin sustained-release implantation agent subcutaneous injection, the experiment group were treated by Guizhi Fuling pill treatment.After treatment, the clinical efficacy, serum MAPK, ERK-5, VEGF, ERK, T-cad and VE-cad levels of the patients were compared.Results Compared with the control group, the clinical total effective rate was higher in the experiment group (P<0.05);MAPK and ERK-5 levels in serum were lower (P<0.05), ERK level in serum was lower(P<0.05);T-cad and VE-cad levels in serum were lower(P<0.05);VEGF level in serum was lower(P<0.05).Conclusion Guizhi Fuling pill can block the cell signal transduction pathway through inhibition of MEK and ERK activity, thereby inhibit abnormal endometrial proliferation and cell division cycle, can effectively inhibit the proliferation and differentiation of the tumor.
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Objective To explore drug resistance and distribution of multidrug-resistant(MDR)Mycobacterium tuberculosis (M.tuberculosis)in a county-level hospital,so as to strengthen the prevention and control of health-care-associated infection with M.tuberculosis .Methods Specimens with positive sputum smear were performed M. tuberculosis culture and drug resistance testing,and distribution of MDR tuberculosis patients in the departments before isolation were investigated retrospectively.Results Of 488 patients with tuberculosis,254 were positive for sputum smear,122 M.tuberculosis strains were isolated from positive sputum smear patients,120 isolates were per-formed drug susceptibility testing,results revealed that 86 isolates were drug-resistant strains,46 of which were monodrug-resistant,40 were MDR.Of MDR strains,16 were all resistant to isoniazide,rifampicin,streptomycin, and ethambutol.The percentage of monodrug-resistance,MDR,pandrug resistance was 9.43%,8.20%,and 3.28% respectively.Medical imaging department,ultrasound department,and respiratory disease department were the main units of M.tuberculosis exposure.Conclusion The percentage of MDR M.tuberculosis is high among M. tuberculosis ,surveillance should be intensified,so as to prevent the transmission in hospital.
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Objective To investigate the drug resistance and risk factors of hospital-acquired pneumonia (HAP) induced by imipenem-resistant Acinetobacter baumannii.Methods Clinical data on 114 patients with Acinetobacter baumannii-related HAPs admitted in Wujiang First People' s Hospital in Suzhou during January 2013 and December 2014 were retrospectively analyzed.According to the results of drug sensitivity test,patients were divided into imipenem-resistant group and non imipenem-resistant group.Drug resistance to 20 commonly used antibiotics was observed in two groups,and multivariate Logistic regression analysis was performed to identify the risk factors of imipenem-resistant Acinetobacter baumannii infection.Results Among 114 strains ofAcinetobacter baumannii,66 strains (57.89％) were imipenem-resistant and 48 strains (42.11％) were non-imipenem-resistant.The resistance rates to β-lactams,quinolones and aminoglycosides were significantly higher in imipenem-resistant group than those in non-imipenem-resistant group (P ＜ 0.01),and no tigecycline-resistant strain was found in both groups.Univariate analysis showed that acute physiology and chronic health evaluation Ⅱ (APACHE Ⅱ) score ≥ 15,plasma level of albumin ≤ 25 g/L,intensive care unit (ICU) stay,indwelling gastric tube,deep venous catheterization,establishment of artificial airway,mechanical ventilation time ≥ 7 d,use of broad-spectrum antibiotics ≥ 14 d and combined use of antibiotics were risk factors of imipenem-resistant Acinetobacter baumannii related HAP (x2 =13.06,6.86,25.40,15.09,17.87,21.46,17.94,6.91 and 10.10,P ＜0.01).Multivariate Logistic regression analysis revealed that establishment of artificial airway [OR =72.014,95％ confidetial interval (CI):19.566-265.061,P ＜ 0.01],and use of broad-spectrum antibiotics ≥ 14 d (OR =3.892,95％ CI:1.092-13.879,P ＜ 0.05) were independent risk factors of imipenem-resistant Acinetobacter baumannii related HAP.Conclusion Imipenem-resistant Acinetobacter baumannii strains are highly resistant to most antibiotics.Strict control of invasive procedures and long-term combined use of antibiotics may reduce the occurrence of imipenem-resistant Acinetobacter baumannii related HAPs.
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OBJECTIVE@#To explore the expression levels of three T-type calcium channel receptors (α1G; α1H; α1I) in the cochlea and spiral ganglion neurons of C57BL/6J mice with different ages.@*METHOD@#Thirty cases of C57BL/6J mice were divided into three groups (6-8 W, 24-26 W, 42-44 W) according to the age. The expressions of three T-type calcium channel receptors were quantified by RT-PCR after hearing thresholds measured by ABR.@*RESULT@#Three receptors were detected in the cochlea and spiral ganglion neurons of 6-8 W C57BL/6J mice. The quantitative results showed that the expression levels of α1H and α1I were highest among three receptors in spiral ganglion neurons and in the cochlea respectively. The expression levels of three receptors significantly decreased with age,especially at the age of 4244 W.@*CONCLUSION@#The expression of T-type calcium channel receptors reduced with age in the inner ear of C57BL/6J mice.
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Animals , Mice , Calcium Channels , Calcium Channels, T-Type , Cochlea , Metabolism , Ear, Inner , Mice, Inbred C57BL , Neurons , Receptors, Calcium-Sensing , Spiral Ganglion , MetabolismABSTRACT
Objective To summarize the experience of clinical pharmacist ’ s work and explore the working method of pharma-ceutical care in the department of orthopedics .Methods With the characteristics of the orthopedics department , clinical pharmacists should provide pharmaceutical care in steps .At present, we focus on pharmaceutical inquisition , management of antibiotics use of peri-operative patients , and assisting doctors on the treatment of infectious patients and choosing proper analgesics .Results The work was gradually been accepted by doctors and nurses , and their requirement for clinical pharmacist was increased , which enhanced the basis of depth and breadth of pharmaceutical care in the future .Conclusion Clinical pharmacists should grasp the feature of orthopedics de-partment and improve their working capability gradually , thus to supply pharmaceutical care for the clinic with better quality .
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OBJECTIVE@#To investigate the role and significance of CD45RO in occurance and development in laryngeal squamous carcinoma, and to provide some valuable clues for searching new approaches to assess prognosis and theoretical basis for tumor biotherapy.@*METHOD@#The expression of CD45RO protein in 50 cases of laryngeal squamous carcinoma and 10 cases normal mucos was detected by immunohistochemical S-P method.@*RESULT@#The positive rate of CD45RO was 30% and 86% respectively in normal tissue and laryngeal squamous cell carcinoma tissue. The expresion of CD45RO was significantly and negatively associated with local metastatic of lymph nodes 0.713, P < 0.05) and tumor sites (r = -0.750, P < 0.05), but it have no notable difference with pathology differentiation, age, infiltrating depth and clinical stages in 50 cases of laryngeal squamous cell cancer.@*CONCLUSION@#(1) The expresion of CD45RO in laryngeal squamous cell cancer is more than that in normal tissue. (2) It is possible that overexpresion of CD45RO in laryngeal squamous cell carcinoma cut local metastatic lymph nodes. (3) It is probable that overexpresion of CD45RO in laryngeal squamous cell cancer made for prognosis of patients. (4) Other than UICC-TNM stage, pathology differentiation, it provide valuable clues for searching new approaches to assess prognosis of laryngeal squamous cell carcinoma.
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Female , Humans , Male , Carcinoma, Squamous Cell , Blood , Pathology , Laryngeal Neoplasms , Blood , Pathology , Leukocyte Common Antigens , Blood , Lymph Nodes , Lymphatic Metastasis , PrognosisABSTRACT
This study investigated the anti-HSV-2 effect of alumen through in vitro and in vivo experiments. Viable cell counting was employed to assess the toxicity of alumen on Vero cells. The inhibition rate of HSV-2 was defined as the cytopathic effect (CPE) of the cells infected with the virus. Alumen suppositories of different concentrations were vaginally applied to the guinea pigs which were then infected with HSV-2 via a vaginal route. The clinical symptoms were observed and the local virus titer calculated. The results showed that alumen had an in vitro anti-HSV-2 effect by means of antiviral duplication, direct killing of the virus, and antiviral adsorption. Alumen suppositories of different concentrations could reduce or completely inhibit HSV-2 infection in guinea pigs. It was concluded that alumen had an in vitro anti-HSV-2 effect through multiple approaches and it could suppress in vivo vaginal HSV-2 infection of guinea pig to some extent.
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ObjectiveTo investigate application value of parametric image processing in contrastenhanced ultrasound imaging in diagnosis of ovarian masses. MethodsFifty cases with ovarian masses underwent routine ultrasound and contrast-enhanced ultrasound imaging using a new dedicated parametric image processing software SonoLiver to analyze patterns of vascular formation and blood stream perfusion in the ovarian mass tissues on a digital video recorder in real time, compare their morphological characteristics of time-intensity curve (TIC) and dynamic vascular patterns (DVP) curve, and analyze quantitatively all indicators generated by SonoLiver.ResultsIn ultrasound imaging of the 50 cases, there were 24 cases (86％) displaying mainly blue lowly-enhanced imaging in those with benign masses and 15 cases (68％)displaying mainly red highly-enhanced imaging in those with malignant masses, with statistical significance (P ＜0. 01 ). There was significantly different characteristics of TIC and DVP between patients with benign and malignant masses. In 23 cases with benign masses, their DVP were significantly higher above the baseline than in those with malignant ones ( P = 0. 000), and in 15 cases with malignant lesions, their DVP were much shorter below the baseline than in those with benign ones, with statistical significance (P ＜0.05). The intensity of contrast medium, the time to reach its peak intensity and average transit time were all significantly higher in those with malignant masses than in those with benign ones (all P ＜ 0. 05 ). But, no statistical difference in the time of initial increasing between the two groups was found (P ＞ 0. 05). ConclusionsThere is significant difference in TIC and DVP of ultrasound imaging between benign and malignant masses, which if combined with contrast enhanced ultrasound parametric image processing can provide a more visualized quantitative information of benign and malignant ovarian masses with SonoLiver software.
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<p><b>OBJECTIVE</b>To determine the concentration of matrine in rats plasma and tissue and study the pharmacokinetics and tissues distribution of matrine solution (MS), regular matrine liposome (ML) and stealth matrine liposome (LML) after the intravenous administration at a single dose of 15 mg x kg(-1) to rats.</p><p><b>METHOD</b>Reversed-phase HPLC was used to determine matrine concentration in rats plasma and tissues.</p><p><b>RESULT</b>The concentration-time curves of MS, ML and LML were fitted to a two-compartment model. The terminal half-life of LML was 2.7-fold higher than MS and 2-fold higher than ML. The area under the plasma concentration curve (AUC) of LML was 63-fold higher than MS and 2.3-fold higher than ML. Tissues distribution results proved that the area under the plasma concentration curve of LML was significantly different from ML and MS (P<0.05). The area under the liver and spleen curve of LML was significantly different from ML (P<0.05). The ratio between the area under the curve of plasma and the area under the curve of reticulo-endothelial system (Blood/RES) of LML was 5.4-fold higher than ML.</p><p><b>CONCLUSION</b>Our present studies demonstrate that, compared to MS and ML, LML significantly alters its pharmacokinetics in plasma and tissues targeting.</p>
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Animals , Female , Male , Rats , Alkaloids , Blood , Pharmacokinetics , Calibration , Linear Models , Liposomes , Quinolizines , Blood , Pharmacokinetics , Sensitivity and Specificity , Tissue DistributionABSTRACT
OBJECTIVE:To establish a method for content determination of matrine in it's liposomes by acid dye colorime_ try.METHODS:Sephadex gel G-50 column was established by swelling of matrine liposomes sample in distilled water for at least 12 hours,distilled water was used as mobile phase,after eluting,the column was mixed with 0.0 125%of bromothymol bl_ ue buffer solution and chloroform,and then the mixture was shaken,standing and demixed,the absorbability of chloroform layer was detected at the wavelength of 413 nm.RESULTS:The detection concentration of matrine showed good linearity with its absorbability within the range of 0.04～0.20mg/ml(r=0.9 972),the average recovery was 94.10%(RSD=1.86%).CONCL_ USION:The established method is simple and accurate,which can be used for quality control of matrine liposomes.