Endothelial progenitor cells(EPC),which have the capacity to differentiate into mature endothelial cells,have been found to home to and incorporate into the angiogenic vasculature of growing tumors with high specificity once mobilized into the circulation.Yet the mechanism still remains unclear.EPC have potential as spatial-specific delivery vehicles.Thus,further studies on the mechanisms of tumor neovascularization and tumor therapy in glioma using genetically engineered EPC as angiogenesis-selective vectors will be of help to explore the potential in the basic and clinical application of EPC in(glioma.)

Objective To compare the efficacy and safety of lauromacrogol injection sclerotherapy with ethanol injection sclerotherapy in treating simple liver cysts. Methods A total of 166 patients with simple liver cyst were randomly divided into the lauromacrogol group (study group, n=86) and the absolute alcohol group (control group, n=80). Under ultrasonographic guidance, puncture aspiration of liver cyst was carried out in all patients, which was followed by injection of lauromacrogol for patients in the study group or injection of ethanol for patients in the control group. The therapeutic effect and the side-effect were evaluated. The results were compared between the two groups. Results No serious complications such as bleeding or infection occurred in both groups. During the therapeutic course , 45 patients (56.3%) in the control group felt pain to some degree and 23 patients (28.8%) developed drunk-like symptoms, while no patient in the study group felt any obvious discomfort. One week after sclerotherapy , 20 patients (25%) in the control group complained of distending pain on the right upper abdomen, while only 9 patients (10.5%) in the study group complained of pain, and the difference was statistically significant (χ2= 6.073, P < 0.05). Six months after the treatment, the cure rate of the study group and the control group was 95.7%and 93.5%respectively, and the difference between the two groups was no significant (P > 0.05). Conclusion For the treatment of liver cysts, lauromacrogol injection is safe and effective. Therefore, this technique should be recommended in clinical practice.

Adult ; Anti-Inflammatory Agents, Non-Steroidal ; therapeutic use ; Arthritis, Rheumatoid ; diagnosis ; drug therapy ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Humans ; Male ; Middle Aged ; Phytotherapy ; Spondylitis, Ankylosing ; diagnosis ; drug therapy ; Tripterygium ; chemistry

OBJECTIVETo analyze the relationship between symptoms and signs of temporomandibular disorders (TMD) and the patients' quality of life (QOL).

METHODSA total of 492 TMD patients were included in this study. The clinical examination results were recorded using Fricton index of temporomandibular joint function. "Visual analog scale (VAS) evaluation of QOL disturbance" was designed to quantitate patients' QOL, to evaluate the degree that the patients QOL was affected.

RESULTSChewing, daily life and emotion among all 8 items of QOL were frequently affected by TMD, and joint clicking had the least influence on QOL. Intermittent closed lock had more severe interference with QOL than joint clicking only. Severe and moderate pain or limited mouth opening affected the QOL more severely than mild pain or mild limited mouth opening. The simple linear relationship between Fricton index and patients' QOL was poor (r < 0.4).

CONCLUSIONSPain is the most frequently seen symptom in TMD. TMD could affect patients' QOL, including both physical and social-psychological functions. The results suggest that the patients' QOL as well as TMD symptoms and signs should be considered in the management of TMD.

Humans ; Microbial Sensitivity Tests ; Pneumoconiosis ; microbiology ; Sputum ; microbiology ; beta-Lactam Resistance ; beta-Lactamases ; analysis

Objective: To study the quality and transdermal properties of matrine microemulsion-based hydrogel (MBH) to provide basis for the development of the preparation.Methods: The stability of MBH was observed at 4 ℃ for 3 months and the changes of particle appearance, viscosity, pH and matrine content were observed.The transdermal permeation of MBH was investigated by a dual chamber permeation and diffusion device with excised mouse skin as the barrier.Taking rabbits as the experimental subjects, the irritation of MBH to the normal skin and damaged skin was investigated.Results: The appearance, viscosity, pH and matrine content of MBH at 4 ℃ in 3 months did not change significantly.In vitro transdermal test showed that MBH had a good penetration rate on mouse skin, and no skin irritation occurred after single or multiple administrations.Conclusion: MBH has good stability and high rate of transdermal penetration without skin irritation, which is a promising drug delivery system of matrine with good application prospects.

Objective: To learn the concentration of target genes of severe acute respiratory syndrome coronavirus 2 ( SARS-CoV-2 ) and the influencing factors in the confirmed cases with coronavirus disease 2019 ( COVID-19 ) in Ningbo. Methods: Demographic information and clinical diagnosis of COVID-19 cases reported in Ningbo from January 21 to February 20, 2020 were collected through China Disease Control and Prevention Information System. The Ct values of ORF1ab and N of the cases were collected through Ningbo Center for Disease Control and Prevention and designated hospitals, and analyzed in terms of gender, age, severity, clinical classification, source of case, sampling time and specimen type. Results: There were 157 confirmed COVID-19 cases, including 56 males ( 35.67% ) and 101 females ( 64.33% ). Sixty-seven cases ( 42.68% ) aged between 40 and 60 years old. The Ct values of ORF1ab and N in females were 29.96±5.28 and 30.38±4.90, which were higher than 27.56±4.94 and 28.03±4.88 in males ( P<0.05 ). The Ct values of ORF1ab and N were the lowest when sampled at 1-7 days after onset ( P<0.05 ), which were 27.84±4.80 and 28.35±4.65. The Ct values of ORF1ab ( rs=0.288, P=0.001 ) and N ( rs=0.296, P=0.001 ) were positively correlated with sampling time. The Ct values of ORF1ab in pharyngeal swab and sputum were 29.19±4.85 and 28.74±6.40, the Ct values of N in pharyngeal swab and sputum were 29.61±4.60 and 29.22±6.10, both without significant differences between different samples ( P>0.05 ). Conclusions Sampling time has a great influence on the Ct values of ORF1ab and N of SARS-CoV-2.

Objective To establish a rat model of coal-burning-borne fluorosis,and to observe the expression changes of bone morphogenetic protein-2 (BMP-2) and bone morphogenetic protein-3 (BMP-3) in the serum of rat treated with different dose of fluoride and different treatment duration.Methods A total of 120 clean grade SD rats(body mass between 80 to 120 g) weaned for 4 weeks were randomly assigned into four groups,which were control,low-dose fluorid,medium-dose fluorid and high-dose fluorid groups,respectively,and 30 rats in each group (female 15,male 15).All of the rats were fed with coal drying corn from fluorosis area.Ten rats were killed by femoral artery bleeding 30 d,90 d and 180 d after exposed to fluoride,respectively.Serum BMP-2 and BMP-3 level was tested by enzyme-linked immunosorbent assay (ELISA).Results ①Results of BMP-2:after exposed to fluoride for 90 d and 180 d,the differences of serum BMP-2 level between groups were statistically significant(F=385.08,173.98,all P ＜ 0.01).In low-dose fluorid,medium-dose fluorid and high-dose fluorid groups,the expression of serum BMP-2 at 90 d[(18.80 ± 0.43),(22.22 ± 0.85),(25.14 ± 0.69)μg/L] and 180 d[(7.98 ± 0.68),(8.97 ± 0.78),(15.04 ± 0.89)μg/L] was higher than that of control group[(12.54 ± 1.29),(7.53 ± 0.97)μg/L,all P ＜ 0.05],and the level of BMP-2 increased with increasing dose of fluoride (all P ＜ 0.05).Within each group,the difference of serum BMP-2 was statistically significant(F =55.42,511.58,686.35,671.64,all P ＜ 0.01).The expression of BMP-2 in each group at 90 d [(12.54 ± 1.29),(18.80 ± 0.43),(22.22 ± 0.85),(25.14 ± 0.69)μg/L] was higher than that at 30 d[(11.75 ± 1.15),(11.42 ± 1.07),(11.38 ± 0.92),(11.15 ±1.03)μg/L,all P ＜ 0.05].The expression of BMP-2 in each group at 180 d[(7.53 ± 0.97),(7.98 ± 0.68),(8.97 ± 0.78),(15.04 ± 0.89) μg/L] was lower than that at 90 d.②Results of BMP-3:the difference between groups was not statistically significant at every experimental stage(F =0.7215,1.2951,0.0964,all P ＞ 0.05).Conclusions Longer excessive fluoride intake stimulates the expression of BMP-2 in rats,but with prolonged fluoride intake,the stimulation becomes weak.The effect of fluoride on BMP-3 is not as sensitive as that on BMP-2.

OBJECTIVEThe present study is concerning qualitative and quantitative detection of Poria cocos quality based on FT-near infrared (FT-NIR) spectroscopy combined with chemometrics.

METHODThe Poria cocos polysaccharides contents were determined by UV. Transmission mode was used in the collection of NIR spectral samples. The pretreatment method was first derivation and vector normalization. Then principal component analysis (PCA) was used to build classification model and partial least square (PLS) to build the calibration model.

RESULTThe results showed that conventional criteria such as the R, root mean square error of calibration (RMSEC), and the root mean square error of prediction (RMSEP) are 0.944 0, 0.072 1 and 0.076 2, respectively. The misclassified sample is 0 using the qualitative model built by PCA.

CONCLUSIONThe prediction models based on NIR have a better performance with high precision, good stability and adaptability and can be used to predict the polysaccharose content of Poria cocos rapidly, which can provide a fast approach to discriminate the different parts of Poria cocos.

Objective To explore the possibility of basic fibroblast growth factor(bFGF)and epidermal growth factor(EGF)combined with striatal conditioned medium promoting the directional differentiation of rat bone marrow mesenchymal stem cells(BMMSCs)into dopaminergie neurons.Methods 1.Separation and culture of BMMSCs:BMMSCs were harvested from healthy adult Wistar rats for serial subcultivation.2.Preparation of Striatal conditioned medium:newborn Wistar rats within 24 hours were selected,and their brain tissues were removed to prepare striatal conditioned medium.3.Induced differentiation of BMMSCs:the 5th passage BMMSCs were collected and pre-induced in low glucose-Dulbecco's modified eagle medium(L-DMEM)containing bFGF and EGF.Twenty-four hours later,pre-induction liquor was replaced with striatal conditioned medium for further induced differentiation.4.Result assessment:the morphological changes of stem cells were observed under inverted phase microscope.The expression of neuron specific enolage(NSE)and tyrosine hydmxylage(TH)were identified by immunocytochemical technique.Results The cell body of rat BMMSCs contracted into round and spindle shape after induction by bFGF and EGF combined with striatal conditioned medium.Partial neuron-like cells with prominence could be found.Immunocytochemieal detection showed that the percentages of NSE and TH positive cells were(72.70±14.81)% and(34.50±15.93)%,respectively.Conclusion BMMSCs can be induced directionally into dopaminergiC neurons by bFGF and EGF combined with striatal conditioned medium in vitro.