Objective To investigate the reversal effect and the mechanism of sodium norcantharidate(SNCTD)on human lung adenocarcinoma cell line A549/DDP. Methods CKK assay was used to screen out non-toxic concentration (less than 10 percent of cell inhibition ratio) of SNCTD, and to measure the IC50 of cisplatin and IC50 of innoxious concentration SNCTD plus cisplatin in drug-resistant cell line. The accumulation effect of Rh123 was assayed by flow cytometry after treatment with non-toxic concentration of SNCTD. PT-PCR was used to detect the expression of mdr1, MRP1 gene for the drug-resistant cell line treated with non-toxic concentration of SNCTD for 48h. Results (1)The non-toxic concentration of SNCTD was 5μg/ml. SNCTD could decrease drug resistance to cisplatin. The reversal fold was 1.97. (2)The fluorescence intensity of Rh123 in the cells treated with 5μg/ml SNCTD was obviously increased (F=36.99, P＜0.05). (3)The expressions of mdr1, MRP1 gene decreased significantly in a concentration-dependent manner.Conclusions SNCTD could reverse the resistance to cisplatin in A549/DDP cell line. It possibly downregulates the expression of mdr1, MRP1 gene, and inhibits the function of efflux pump of membrance protein.

Objective To study the set-up errors by CBCT in IMRT with two different immobilization techniques for thoracic and abdominal tumors.Methods Sixty patients with thoracic and abdominal tumor were included in this study and separated into study group and the control group.The study group were immobilized with carbon fiber holder,vacuum bag and thermoplastic mask.The control group were immobilized with carbon fiber holder and thermoplastic mask.CBCT scan and auto-match online were regularly performed before the treatment.The setup of left-right(x),superior-inferior(y),anterior-posterior (z) were received.The value of the Mptv was calculated,meanwhile.The grouped t-test of was carried out between these two methods.Results The shift errors in x-,y-,z-dimension of the study group were (0.32 ± 2.58) mm,(-0.40 ± 3.89) mm,(-0.75 ± 2.43) mm.The Mrrv were 5.60 mm,6.08 mm,6.32 mm.The translation set-up errors in x-,y-,z-dimension of the control group were(0.62 ±3.60),(2.44 ± 4.93),(0.66 ±2.85) mm,respectively.The MPrv were 8.07,10.63,6.90 mm,respectively.The t-test value were t =-0.78,-5.11,-4.22,P =0.440,0.000,0.000,respectively.Conclusions The immobilization techniques with carbon fiber holder,vacuum bag and thermoplastic mask would be better than the techniques without the vacuum bag in reducing the setup errors.

Objective To design a quantitative criterion and grading system for injury from adverse drug reaction (ADR) in order to serve the compensation system of injury from ADR. Methods Based on the other grading system of injury cases, the independent scores and serial grades were given to the ADR injury of different organs or different levels through two turns of consultation to 27 experts from Shanghai. Results Injury from ADR was graded from stage 1 to stage 10 according to the damage degree, with 1 stand for death and 10 for slightest injury. Conclusion The grading method of ADR based on the characteristics of injury accords with the condition of China, and can provide reference for making up the compensation system of ADR injury.

Objective To evaluate the diagnosis value of echocardiography in infants with complete transposition of the great artery.Methods Echocardiographic characteristics of 13 cases with completely artery transposition were compared with the results of operation.Results Simple artery transposition in complete ventricular septum occurred in 5 cases(atrial septal defect with patent arterial duct in 2 cases,simple patent arterial duct in 2 cases, simple atrial septal defect in 1 case).Great artery transposition with ventricular septal defects occurred in 8 cases (great artery transposition with ventricular septal defects, atrial septal defects,patent arterial duct in 3 cases; atrial and ventricular septal defect in 1 case; ventricular septal defect in 3 cases; ventricular septal defect with two branches of right coronary artery in 1 case).Out of 13 cases,the ultrasound diagnosis in 12 cases before operation was completely consistent with that of operation.Coronary deformity in one case had not been detected by echocardiography.Conclusions Great artery transposition in infants can be diagnosed and typed early by echocardiography,which provides the reliable information for clinic selection of operation and follow up survey.

Objective:To evaluate the association between brachial-ankle pulse wave velocity ( ba-PWV) and metabolic syndrome ( MetS) among the Chinese elderly and the gender difference .Methods:We conducted a population-based cross-sectional study in a representative urban area of Beijing , China. A sample of 2 102 community elderly (848 males, and 1 254 females) aged 60 to 95 years were included in the study .MetS was defined according to the 2009 harmonizing definition .Results:The prevalence of MetS was 59.1% (50.1% in males and 65.2% in females, P<0.001).The baPWV value was be-tween 8.2 to 45.6 (20.0 ±4.4) m/s, and showed an increasing trend with age (P<0.001).The par-tial correlation showed baPWV was positively associated with BMI (r =0.076, P =0.037), systolic blood pressure (r=0.380, P<0.001), diastolic blood pressure (r=0.276, P<0.001), triglyceride (r=0.040, P=0.046), fasting blood glucose (r=0.140, P<0.001), 2-hour post-meal blood glu-cose (r=0.121, P<0.001), and negatively associated with HDL-C (r=-0.128, P=0.048).There was a strong association between baPWV and prevalence of MetS and its component number in females but not in males .Compared with the lowest quartile of baPWV , the adjusted ORs were 1 .22 ( 95%CI 0.83-1.79), 1.32(95%CI 0.90-1.93), 1.46(95%CI 1.00-2.14) in males and 1.28(95%CI 0.93-1.77), 1.55(95%CI 1.12 -2.16), 1.86(95%CI 1.32-2.61) in females for the second, third and top quartiles .Conclusion:The prevalence of MetS increases substantially with increasing levels of baPWV among the Chinese elderly , especially in females .

Objective:To investigate the correlation between variations in mitochondrial DNA (mtDNA) control region (D-loop) and keloids.Methods:A total of 216 patients with keloids were collected from Department of Dermatology, the First Affiliated Hospital of Kunming Medical University from 2016 to 2019. Total DNA was extracted from peripheral blood samples of all the patients, as well as keloid tissues and perilesional normal skin tissues of 25 patients with keloids. Peripheral blood samples were collected from 299 health checkup examinees without keloids in Health Examination Center, the Affiliated Hospital of Yunnan University, who served as controls. PCR amplification and Sanger sequencing were performed on the mtDNA D-loop region, and mutation sites in each sample were analyzed by comparisons with the revised Cambridge Reference Sequence (rCRS) . Haplogroups were assigned in the 2 groups by using Phylotree-mtDNA tree Build 17. Mutations in the mtDNA D-loop region were compared among keloid tissues, perilesional normal skin tissues and peripheral blood samples. A median-joining network was constructed via network 5.0 software. Binary logistic regression analysis was performed to investigate the correlation between haplogroup frequencies and the occurrence of keloids, and chi-square, t and t′ tests were used to analyze clinical data. Results:Among the 216 patients with keloids, variations in mtDNA D-loop region were classified into 10 haplogroups, including A, B, D, R9, G, M*, M7, M8, M9 and N9, with the haplogroups R9 and M9 showing the highest (21.3%, 46/216) and lowest (0.9%, 2/216) frequencies respectively. The frequencies of haplogroups M7 ( P=0.040, OR=0.248, 95% CI: 0.066 - 0.937) and N9 ( P=0.048, OR=0.191, 95% CI: 0.037-0.986) were significantly lower in the patients with keloids than in the controls. The median-joining network plot showed that the distribution pattern of the haplogroup M7 differed between the patients with keloids and controls. Significantly less number of lesional sites and younger age of onset were observed in the patients with haplogroup M7 compared with those with non-M7 haplogroups ( P=0.000 1, 0.045, respectively) . Conclusion:The haplogroup M7 is correlated with the occurrence of keloids, and may be a potential protective factor for keloid formation.

Cone-beam CT (CBCT) of Elekta can be used to analyze the setup errors in intensity modulated radiotherapy. A total of 240 patients with head and neck cancer were chosen in the period from October, 2009 to October, 2010. Their CBCT images were obtained after initial setup, and registered to the planning CT images, and then the setup errors on translational directions (X, Y, Z) and on rotational directions (U, V, W) were obtained and analyzed. The results showed that the setup errors on translational directions in Y-axis and Z-axis were larger than in X-axis, and the setup errors on rotational directions in Y-axis was much more obvious than those on the other two directions, which should be taken care during the patient daily setup. It may be concluded that the CBCT system can improve the precision for radiotherapy.
Cone-Beam Computed Tomography ; methods ; Head and Neck Neoplasms ; diagnostic imaging ; radiotherapy ; Humans ; Radiotherapy Setup Errors ; prevention & control ; statistics & numerical data ; Radiotherapy, Intensity-Modulated

Objective This study was aimed to investigate the effects of ω-3 polyunstaurated fatty acids (ω-3 PUFAs) on the growth of gastric cancer cells in nude mice,and to find whether the Ros homolog gene Rho-associated coiled-coil containing protein kinase 1 (RHO-ROCK1) signaling pathway is involved.Methods 16 BALB/C nude mice were injected subcutaneously with SGC7901 gastric cancer cells to establish the tumor-bearing mouse model.The mice were randomized:control group (normal saline) and intervention group (ω-3 PUFAs).The mRNA expression of Ros homolog gene family,member A (RHOA),RHOC,and ROCK1 in tumor tissue were detected by quantitative polymerase chain reaction (qPCR).Immunofluorescence and Western blot were used to detect RHOA,RHOC,and ROCK1 protein expression.Results The volume and weight of the tumors in the ω-3 PUFAs group were slightly smaller than that in the control group (P ＞ 0.05).Compared to the control group,hematoxylin and eosin staining showed multifocal tumor necrosis in the ω-3 PUFAs group,while the tumors of the control group showed abundant blood supply.qPCR and Western blot showed that the mRNA and proteins expression of RHOA and ROCK1 in the ω-3 PUFAs group was significantly lower than those in the control group (P ＜ 0.05).The immunofluorescence redults also showed that the expression of these proteins in the ω-3 PUFAs group was slightly lower than that in the control group.Conclusions These results suggested that ω-3 PUFAs may affect the growth of gastric cancer in nude mice by affecting the expression of RHOA,RHOC and ROCK1,thus inhibiting the excessive proliferation of gastric cancer cells and leading to tumor necrosis.

OBJECTIVEThe aim of the present study was to evaluate the association between waist circumference and the prevalence/control of hypertension in an urban elderly population.

METHODSFrom September 2009 to June 2010, a population-based cross-sectional study was conducted in Wanshoulu area of Beijing, China.

RESULTSA total of 2 035 elderly (828 male, 1 207 females) participants aged ≥60 years from a community were included in this study for data analysis. We found that the increased waist circumference could significantly increase the risk of prevalence and poor control of hypertension, with the adjusted odds ratios (95% CI) as 1.04 (1.01-1.08) and 0.96 (0.92-1.00) , respectively. Among those identified pure central obesity females (64.7%) , the prevalence of hypertension was significantly higher than those females with normal body mass index (BMI) or with normal waist circumference (52.2%). The adjusted odds ratio (95%CI) between the above said groups appeared as 1.58 (1.07-2.32). The control rate of hypertension among females (32.9%) with pure central obesity, was lower than that of the females with normal BMI and waist circumference (43.5%) , with an adjusted odds ratio (95%CI) as 0.62 (0.37-1.04, P=0.071).

CONCLUSIONThere appeared significant association between people with pure central obesity and the increased risk of prevalence or with poor control of hypertension. More attention should be paid to both the prevalence and control of hypertension programs among females with pure central obesity.

Aged ; Beijing ; epidemiology ; Body Mass Index ; Cross-Sectional Studies ; Female ; Humans ; Hypertension ; epidemiology ; prevention & control ; Male ; Middle Aged ; Obesity, Abdominal ; epidemiology ; Prevalence ; Risk Factors ; Sex Distribution ; Urban Health ; statistics & numerical data ; Waist Circumference