This paper is to prepare curcumin (Cur) loaded mesoporous silica nanoparticle (Cur-MSN), evaluate its release behavior and anti-cancer activity in vitro. Mesoporous silica nanoparticle (MSN) was prepared by polymerization method and Cur-MSN was obtained using solvent evaporation method and impregnation centrifugation method. The preparation method was optimized using entrapment efficiency (EE) and loading efficiency (LE) as indexes. Cur-MSN was characterized with scanning electron microscope and its particle size and zeta potential were determined. Finally, in vitro release behavior in 0.2% SDS solution and its cell-killing effect on HeLa cells were also evaluated. The Cur-MSN prepared with process optimization method was round and uniform and exhibited typical mesoporous characterization. The mean particle size and Zeta potential of Cur-MSN were 75.8 nm and -30.1 mV, respectively. EE and LE of three batches of Cur-MSN were (72.55 ± 2.01)% and (16.21 ± 1.12)%, respectively. In vitro release behavior of Cur-MSN showed a sustained release profile with 83.5% cumulative release within 96 h. The killing effect of Cur-MSN on HeLa cells was dose-dependent with IC50 of 19.40 mg x L(-1), which was similar to that of Cur.
Antineoplastic Agents, Phytogenic ; chemistry ; pharmacology ; Curcumin ; chemistry ; pharmacology ; Drug Carriers ; chemistry ; Drugs, Chinese Herbal ; chemistry ; pharmacology ; Humans ; Nanoparticles ; chemistry ; Neoplasms ; drug therapy ; Particle Size ; Porosity ; Silicon Dioxide ; chemistry

Objective To investigete the viral and atypical pathogens in children with acute respiratory infection (ARI) .Methods A total of 17 048 serum samples were collected from children ,who were intended to diagnose as ARI .Indirect immunofluores-cence assays were performed to detect IgM antibodies against 9 common pathogens ,including mycoplasma pneumonia(MP) ,influen-za virus B(FluB) ,respiratory syncytial virus(RSV) ,parainfluenza virus(PIV) ,adenovirus(ADV) ,influenza A virus(FluA) ,legio-nella pneumophila(LPN) ,coxiella burnetii(COX) ,chamydophila pneumonia(CPn) .Results The total detection rate of the 9 patho-gens was 60 .24% (10 269/17 048) .The detection rate of MP was 47 .78% (8 146/17 048) which was the highest ,followed by FluB which was 30 .87% (5 262/17 048) .The detection rate of MP kept at a high level through the whole year ;FluB appeared a little popular in the summer ,winter and spring ;RSV had higher detection rate in winter and spring ;ADV had higher detection rate in spring ;FluA appeared a little popular in spring and summer ;PIV and LPN didn′t show any seasonal change .There were significant differences in the detection rates of ADV ,CPn ,FluA ,FluB ,LPN ,MP ,PIV and RSV among different age groups (P< 0 .05) .In mixed infection with 2 kinds of pathogens ,MP+FluB was the most common pattern which accounted for 39 .58% of mixed infec-tion .In mixed infection with 3 kinds of pathogens ,MP+FluB+RSV was the most common pattern which accounted for 13 .68% .In mixed infection with 4 kinds of pathogens ,MP+ FluB+ RSV+ PIV was the most common pattern which accounted for 3 .84% . Other mixed infection pattern was rare .Conclusion The most common pathogens causing ARI in children of Wuhan were MP ,FluB and RSV .The detection rate of each pathogen displayed specific seasonal variations and variations among different age groups . Mixed infections were more common than single infections ,and the most common pattern was MP+ FluB .

BACKGROUND: In recent years, nanoparticles has been rapidly developing in tumor hyperthermia, genophore research, and targeted drug therapy, particularly nanoparticle containing drug delivery systems will become another breach in tumor therapy.OBJECTIVE: To summarize the application and mechanism of superparamagnetic nanoparticles for cancer treatment in the medical field.METHODS: A computer-based online search was conducted in Medline for English language publications containing the key words of "superparamagnetic, nanoparticles, targeting" from January 2000 to October 2009. Relevant articles were also searched from CNKI with the same key words in Chinese from January 2005 to October 2009.RESULTS AND CONCLUSION: A total of 123 articles about targeting role of magnetic nanoparticles were included, and there were 24 in Chinese and 108 in English. Articles published earlier, duplicated, and similarly were excluded, and 30 references were finally included. Superparamagnetic nanoparticles characterized by targeting role under external magnetic field, and crystal of ferroso-ferric oxide did not has toxicity to cells. As a gene carrier and drug carrier, superparamagnetic nanoparticles were widely used in medical research and they also provided novel evidences for cancer treatment. By an external magnetic field, how to avoid a comprehensive system of phagocytic endothelial phagocytosis and prevent the course of treatment such as drug-induced thrombus is still inadequate.

Objective To investigate the etiology of and therapy for duodenal fistula caused by distal common bile duct operation. Methods An retrospective analysis of 19 cases of duodenal fistula after distal common bile duct operation was made.All cases received surgical management after the fistula was identified.Surgical procedures included abdominal abscess drainage in 2 cases, gastrostomy and jejunostomy combined with abscess drainage in 11 cases, gastrostomy and jejunostomy combined with duodenal repair?abscess drainage in 3 cases,gastrojejunostomy with pyloric exclusion combined jejunostomy in 1 case, repair of fistula with padicled intestinal seromuscular patch combined with gastrostomy and jejunostomy in 1 case, and repair of fistula with padicled intestinal seromuscular patch combined with gastrostomy and jejunostomy plus sphincteroplasty in one case. Results Among 19 cases,15 were cured. Two died of gastrointestinal bleeding, one of severe retroperitoneal infection,one of severe pancreatitis. ConclusionsEarly diagnosis is of great importance for the treatment of duodenal injury. Drainage is the mainstay for the treatment of iatrogenic duodenal fistula, while enough enteral nutrition should be given to accelerate spontaneous closure of the fistula.

ObjectiveTo explore the possible pathogeny of tension headache(TH) as well as some emotional and cognitive function impediment.Methods53 cases with tension headache were given coronal CT or MRI examination and cervix X-ray examination.Self-Rating Anxiety Scale(SAS),Self-Rating Depression Scale(SDS) and Mini-Mental State Examination(MMSE) were used to assess their emotion and cognition.ResultsThere were 14 cases of magnitude mental events induced anxiety and/or depression,23 cases of work tensions induced anxiety,14 cases of work tensions induced depression,and 12 cases of lightly cognitive impediment.ConclusionTension headache patients usually related with continued convulsion of cervical muscle induced by hard work and life.Most of them represent more or less emotional impediment,part of them represent lightly cognitive impediment.

Objective To evaluate the value of detection of interleukin 28B (IL28B) rs12979860 by allele-specific PCR (AS-PCR) for the prediction of antiviral treatment hepatitis C patients.Methods One hundred seventy-four blood samples were random collected from hospitalized patients with hepatitis C,who came from department of infectious diseases,Renmin Hospital of Wuhan University from May 2011 to May 2012.Two pairs of specific primers were designed for rs12979860 gene polymorphisms,and one mutated base was introduced to the second or third site of the end of 3' with the reverse primer.rs12979860 gene polymorphism of 30 cases with hepatitis C was detected by AS-PCR,and gene sequencing was further used to verify the consistency of the two methods in parallel.Then,the frequency distribution of different rs12979860 genotypes with 174 cases were analyzed by the AS-PCR method in the population.Results The genotype CC,CT or TT of rs12979860 with 30 cases could be well identified by both AS-PCR and gene sequencing,and the coincidence rate was 100％ (x2 =60.0,P ＜ 0.01).Compared to gene sequencing,both of the sensitivity and specificity of AS-PCR were 100％.Compared to the control (CC genotype),TT genotype detection sensitivity by AS-PCR was 10-5,while sequencing sensitivity was 2 × 10-1.rs12979860 polymorphism in the TT,CC and CT genotype distribution in the Chinese population frequencies were 3.45％ (6/174),13.2％ (23/174) and 83.3％ (145/174),respectively.Conclusion AS-PCR can quickly,accurate,reliable,economic and efficiently detect IL28B rs12979860 gene polymorphism of hepatitis C in patients,which could predict the effect of antiviral therapy on patients with hepatitis C.

Objective To explore the effects of low molecular weight heparin (LMWH) on the virological and pathological changes of newborn mouse liver congenitally infected with human cytomegalovirus (HCMV).Methods Sixty healthy pure line clean level BALB/c mice which were about 10 weeks old (half were female) were divided into five groups (six pairs in each group).The mice in LMWH intervention group and positive control group were intraperitoneally inoculated with 6.0 lg tissue culture infective dose50 (TCID50) of HCMV AD169; those in blank control group were intraperitoneally injected with 0.5 mL dulbecco's modified Eagles medium (DMEM) ; then all the mice were paired to mate.The pregnant mice in LMWH intervention group Ⅰ were subcutaneously injected with LMWH 1000 U/kg daily for 10 days; those in group Ⅱ were subcutaneously injected with LMWH 1000 U/kg daily for 5 days and their newborn mice were subcutaneously injected with LMWH 1000 U/kg daily for 5 days; those in group Ⅲ were subcutaneously injected with LMWH 1000 U/kg daily for 10 days in their newborn mice.All these newborn mice were sacrificed at day 10 of birth.The liver was removed for virus isolation,dry-wet weight determination,pathology examination and quantitative fluorescence-polymerase chain reaction (PCR) detection.The comparison among groups was done by analysis of variance.Results HCMV was isolated from the supernatant of liver tissue homogenate in 10-day positive control newborn mice,while HCMV was isolated in 24-day newborn mice of the other three groups of LMWH intervention.Pathology confirmed that positive control liver tissue had inflammatory changed,liver cell inflammatory swelling degeneration,vacuoles degeneration,specific HCMV inclusion body in nuclear,and portion of liver cell necrosis,while liver pathological results of LMWH intervention group showed mild liver cell inflammatory changes and slight cell inflammatory swelling degeneration,which were similar to the blank control group.The moisture of liver tissue contents in LMWH intervention group decreased more obviously than positive control group.The HCMV DNA loads in 50 mg liver tissues of LMWH intervention groups Ⅰ,Ⅱand Ⅲ were (3.26±0.43),(3.26±0.41) and (3.32±0.51) lg copy,respectively,which were significantly lower than that of positive control group [(7.38 ± 0.53) lg copy; F =314.620,P0.01],while there were no significant differences among LMWH intervention groups (P＞0.05).Conclusion LMWH intrauterine and postnatal interventions can significantly reduce HCMV DNA replication in hepatocytes,and relieve inflammatory changes in liver tissue.

The teaching team of undergraduates of anesthesiology in Anhui Medical University applied the primary trauma care system of encourage, heuristic teaching and practical teaching to further deepen the educational reform and improve teaching quality for undergraduate education.They designed the diversified section such as drills, discussion, teaching, questions, feedback and so on, implemented the simulation training of anesthesia crisis management skills and completed the feedback evaluation of comprehensive ability before and after the teaching, and then achieved the effect of improving the actual operation ability and clinical thinking capacity of students.So it is a good method and worth extending.

Objective To apply the oral gastrointestinal ultrasound contrast agents for evaluating the gastric motility abnor‐mality in the patients with anxiety disorder .Methods Twenty patients with anxiety disorder complicating upper digestive tract symptoms without organic pathological changes were enrolled as the anxiety disorder group .Twenty healthy volunteers were en‐rolled as the control group in this study .The two groups orally took gastrointestinal ultrasound contrast agents .The antral contrac‐tion frequency ,antral contraction amplitude amd MI were measured at each time point .GER was calculated .The the gastric motility parameters in the patients with anxiety disorder were evaluated .Results The antral contraction frequency and MI at initial 2 min had no statistical difference between the anxiety group and the control group .The antral contraction amplitude ,antral contraction frequency amd MI at each time point during 5 -10 min after contrast in the anxiety disorder group were significantly decreased compared with the control group ,and the differences were statistically significant (P< 0 .05) .After 20 min ,GER in the control group was significantly higher than that in the anxiety group ,the difference was statistically significant (P<0 .05) .Conclusion O‐ral gastrointestinal ultrasound contrast agents is a economic ,strongly operable ,non‐invasive and highly repeatable method for evalu‐ating the gastric motility .

OBJECTIVE:To investigate the feasibility and accuracy of the current preparative method of CRRT displacement liquid in hospital preparation manufacturing laboratory.METHODS:The electrolytes in 8 CRRT displacement liquid samples were determined and the RSD values were calculated by comparison with theoretic value;the effects of ionic concentration and volume of raw material on the preparing results as well as the RSD of volume error were investigated.RESULTS:The RSD between theoretical and practical ionic concentrations was lower than 4.14%.The maximum change of ionic concentration caused by concentration of solution was 5.32 mmol?L-1;The maximum volume change caused by volume loading was 62 mL and the displacement liquid ionic concentration lower than theoretical value was 0.4 mmol?L-1.The RSD of volume difference was 2.46%.CONCLUSION:The preparing results of CRRT displacement liquid by the preparative method adopted in our hospital can meet the clinical standard on this preparation.