Objective To explore the correlation between renal damage of patients with gestational diabetes mellitus (GDM ) and level of serum cystatin C(Cys C) .Methods Eutocia puerperas with single birth in this center from January 2011 to December 2012 were retrospectively analyzed .400 puerperas ,who were confirmed as GDM by oral glucose tolerance test (OGTT) detection ,were collected .Among them ,200 puerperas with 24 h urinary protein content more than 0 .15 g during their 30 to 40 weeks of pregnancy were served as GDM group ,while another 200 puerperas with those not more than 0 .15 g as GDM control group .200 healthy puer-peras without GDM were served as the normal group .Serum uric acid ,creatinine ,urea ,Cys C and 24 h urinary protein content of them during their 30 to 40 weeks of pregnancy were detected .Results Serum uric acid and Cys C of patients in GDM group were obviously higher than those in the GDM control group(P<0 .05) ,while the differences of serum urea ,creatinine between the two groups showed no statistical significance (P>0 .05) .24 h urinary protein content was positively correlated with the serum uric acid and Cys C(r=0 .715 ,0 .863 ,P<0 .05) ,and had no correlation with urea and creatinine (P>0 .05) .Conclusion Serum Cys C may be used as indicators for early diagnosis and monitoring of renal damage in patients with GDM .

Objective To explore the impact of NaF · EDTA-K2 on blood lipids measurement in pregnant women , determine whetherthe empty-stomach plasma for OGTT could be used as substitute for serumin blood lipids analyses.Methods Fastingplasma with NaF · EDTA-K2 and serumfrom 100 pregnant women werecollected,andconcentration of CHO,TG, HDL,LDL,apoA1 and apoB were tested with Hitachi 7 600 automatic biochemical analyzer.Data were analyzed by SPSS 19.0 software.Results The concentrations oflipids and lipoproteins with NaF · EDTA-K2 were slightly lower than those of serum.There were statistical significances between the means of CHO , HDL, LDL, apoA1 and apoBof two groups ( P<0.05) except TG.Correlation coefficients of the six analyteswere CHO 0.968, TG 0.995, HDL 0.979, LDL 0.991, apoA1 0.692, apoB 0.846respectively.Standard Error of Estimate for plasma were: CHO 0.281, TG 0.094, HDL 0.077, LDL 0.112, apoA1 0.230, apoB 0.111 respectively.The modified coefficients were 1.08 for CHO, HDL and LDL, 1.14 for apoA1 and 1.07 for apoB.Conclusion NaF· EDTA-K2 negatively biased the blood lipidsmeasurement of CHO , HDL, LDL, apoA1 and apoB in pregnant women,yet lipids concentrations in plasma with NaF · EDTA-K2 were closely related to those in serum , which may be used to predict the bloodlipidslevel of pregnant women afterajusted.

Objective To investigate the relationship between p53,COX-2,Bax,c-myc genes and colorectal carcinoma complicated with chronic schistosomiasis. Methods One hundred and sixty patients with colorectal carcinoma were selected and divided into two groups;a schistosomiasis group(colorectal carcinoma complicated with chronic schistosomiasis,n=80)and a non-schistosomiasis group(colorectal carcinoma uncomplicated with chronic schistosomiasis,n=80). The tissue microarray tech-niques and immunohistochemistry method were used in all the patients to detect the expressions of p53,COX-2,Bax and c-myc proteins. Results The positive rate and level of p53 protein expression in the schistosomiasis group were lower than those in the non-schistosomiasis group,but there were no significant differences between the two groups(both P>0.05). The COX-2 protein in both groups was positive,but the positive expression level of COX-2 in the schistosomiasis group was higher than that in the non-schistosomiasis group,and there was a significant difference between the two groups(P<0.01). The positive rate and level of Bax protein expression were not significantly different between the two groups(both P>0.05). The positive rate of c-myc expression in the schistosomiasis group was higher than that in the non-schistosomiasis group,with a significant difference(P<0.01),but the positive expression level was lower than that in the non-schistosomiasis group,and there was a significant difference between the two groups(P<0.01). Conclusions Schistosome infection may impact on the deficiency of p53 of human colorectal cancer cells. It may promote the excessive expression of COX-2 protein,which is an indirect carcinogenic factor. The expression of Bax gene has no correlation with schistosome infection. The schistosome chronic infection may cause a persistent low level expression of c-myc gene.

Objective To establish the normal reference range for serum folate of healthy children in Guangzhou region.Methods Levels of serum folate of 1 860 healthy children (1 061 males and 799 females) and 129 adults (52 males and 77 females) living in Guangzhou region were examined by LK3000V Vitamin Analyzer.Then the data were analyzed with statistical methods.Results ①There was no statistical difference between boys and girls for levels of serum folate in every group defined by age (P＞0.05).②The levels of serum folate [median(P2.5,P97.5)] defined by age were as follows:9.39 (6.12,14.85) nmol/L for 0～1 year-old group,10.65 (6.05,16.52) nmol/L for 1.01～17 year-old group and 11.12 (6.3,17.51) nmol/L for the adult group.Statistical difference was found between any two groups of the three (P＜0.05).③No statistical correlation was found between age and the level of serum folate (r=0.039,P=0.09).Conclusion Reference range for serum folate for healthy children in Guangzhou region include two parts:6.12～ 14.85 nmol/L for 0～ 1 year-old group and 6.05～～16.52 nmol/L for 1.01～17 year-old group.

Objective To examine the application of On-Board Imaging (OBI) system-based image-guided radiotherapy (IGRT) in the improvement of the precision of intensity-modulated radiotherapy (IMRT) for nasopharyngeal carcinoma.Methods Ten patients with nasopharyngeal carcinoma were treated with IMRT using the OBI system. The IGRT images after positioning, position adjustment, and treatment were observed and recorded to investigate the image difference between CT simulation and IGRT. Results The deviations in the x (lateral), y (cranial-caudal), and z (ventral-dorsal) directions between CT simulation and IGRT images were 0.22±1.00 mm,-0.37±1.28 mm, and 0.04±1.36 mm, respectively, after positioning, 0.29±0.76 mm,-0.04±0.78 mm, and -0.01±0.92 mm, respectively, after position adjustment, and 0.20±0.78 mm, 0.16±0.80 mm, and 0.05±0.92 mm, respectively, after treatment. The probabilities of a ≤1 mm deviation in the x, y, and z directions were 81.0%, 77.6%, and 88.2%, respectively, after positioning, 92.5%, 96.4%, and 96.4%, respectively, after position adjustment, and 91.7%, 94.9%, and 96.8%, respectively, after treatment. Conclusions The application of OBI system-based IGRT is very important in the improvement of the precision of fractionated IMRT for patients with nasopharyngeal carcinoma. The position of the patient should be adjusted based on the IGRT image after positioning in order to correct set-up error and effectively increase the precision of fractionated IMRT.

Objective To identify the role of p53 in the induction of growth arrest DNA damage-inducible gene 45β (GADD45β) in HCC cells by Oxaliplatin.Methods A Hep3B+p53 clone was established by transfection of the full-length p53 sequence to Hep3B.Following oxaliplatin administration,quantitative real-time PCR was employed to validate the expression changes of GADD45β.pGL3 basic luciferase plasmids including promoter fragments were synthesized in vitro and transfected into cells.The effects on promoter activity,cell growth and the cleavage of Caspase-3 were further focused on.Results Hep3B+p53 expressed p53 protein stably.The transfection of p553 enhanced the induction of GADD45β in Hep3B by Oxaliplatin.The promoter activity of fragments constructed NF-κB and E2F-1 binding sites was induced about 1.5 and 0.8 folds by transfection of p53.The colony formation and DNA syntheses were inhibited apparently in Hep3B+p53 with p53 by Oxaliplatin (30.41％ and 75.60％ by 100 μmol/L Oxaliplatin,respectively).Moreover,p53 transfection triggered cleavage of Caspase-3 more rapidly.Conclusion p53 played a role in the induction of GADD45β in Hep3B by Oxaliplatin.

Objective: To quantitatively evaluate dose accuracy of radiotherapy for cervical cancer. Methods: A CT image correction algorithm based on image transformation was proposed. Referring to CBCT images, CT images of radiotherapy plan for cervical cancer were corrected to obtain the corrected images which could reflect the actual body position of treatment. The clinical plan was transplanted to the corrected images for dose recalculation as a test plan, and the dosimetry parameters were statistically compared to evaluate the dose accuracy. Results: Both of the target coverage of contrast plans could meet the clinical requirements (>98%), and there was no significant difference in the homogeneity index (P=0.150). The conformability of the test plan was significantly worse than that of the clinical plan (P<0.05). The maximum dose of each organ at risk in the test plan was approximately 30 cGy higher than that of the clinical plan (P<0.05), V₅₀ was slightly higher than that of the clinical plan, whereas the average dose (D_mean) did not significantly differ. Conclusion The CT image correction algorithm based on image transformation can quantitatively evaluate the dose accuracy of radiotherapy for cervical cancer, which provides reference for resolving similar problems in clinical practice.

Objective Newborn bilirubin encephalopathy seriously threatens the life and health of newborns, Both the mortality and morbidity are high.Cerebrospinal fluid bilirubin concentration can better reflect the blood-brain barrier function and brain bilirubin levels, which can help the diagnosis of bilirubin encephalopathy.Methods In order to meet the clinical needs, we confirmed the detection performance of the existing serum bilirubin detection system for cerebrospinal fluid bilirubin, including precision, accuracy and analysis of measurement range.Results The results showed that the detection system was linear at 1.0-25.1μmol/L, and the daytime CVat normal and pathological values was less than the precision requirement (6％) .The bias of each sample and the average bias are less than the allowable bias (5％) , the total error is less than the total allowable error (15％) .Conclusion Therefore, the performance of the detection system meet the industry standards, can be used for neonatal cerebrospinal fluid bilirubin detection.

Objective:To propose a method of image similarity measurement based on structure information and intuitionistic fuzzy set and measure the similarity between CT image and CBCT image of radiotherapy plan positioning, aiming to objectively measure the setup errors.Methods:A total of four pre-registration images of a nasopharyngeal carcinoma patient on the cross-sectional and sagittal planes and a pelvic tumor patient on the cross-sectional and coronal planes were randomly selected. Five methods were used to quantify the setup errors, including correlation coefficient, mean square error, image joint entropy, mutual information and similarity measure method.Results:All five methods could describe the deviation to a certain extent. Compared with other methods, the similarity measure method showed a stronger upward trend with the increase of errors. After normalization, the results of five types of error increase on the cross-sectional plane of the nasopharyngeal carcinoma patient were 0.553, 0.683, 1.055, 1.995, 5.151, and 1.171, 1.618, 1.962, 1.790, 3.572 on the sagittal plane, respectively. The results of other methods were between 0 and 2 after normalization, and the results of different errors of the same method slightly changed. In addition, the method was more sensitive to the soft tissue errors.Conclusions:The image similarity measurement method based on structure information and intuitionistic fuzzy set is more consistent with human eye perception than the existing evaluation methods. The errors between bone markers and soft tissues can be objectively quantified to certain extent. The soft tissue deviation reflected by the setup errors is of significance for individualized precision radiotherapy.

Objective To compare the curative effect and safety of high-frequency and low-frequency repetitive tran-scranial magnetic stimulation(r-TMS) in the treatment of Parkinson's disease complicated with depressive disorder. Methods All 92 patients with Parkinson's disease complicated with depressive disorder were randomly allocated to three groups. High frequency group received antiparkinsonian drugs combined with high frequency r-TMS (5 Hz);Low frequency group received antiparkinsonian drugs combined with low frequency r-TMS (0.5 Hz);Sham group re-ceived antiparkinsonian drugs combined with sham r-TMS (s-rTMS). Each group received r-TMS twice a week for four weeks. UPDRS and HAMD-17 were assessed every two weeks , adverse events were recorded , and clinical global im-pression was carried out four weeks after the treatment. Results Upon enrollment, scores of HAMD and UPDRS among the three groups were not significantly different (P>0.05). During the second week of the intervention, the HAMD score in high frequency group improved significantly , and the differences between three groups were statistically signif-icant according to one-way ANOVA (P=0.0144). The differences changed larger in the fourth week, with greatly sig-nificant differences between the two groups (P=0.0000);During the second week of the intervention, the differences of UPDRSⅡscores in high frequency, low frequency and sham group were not statistically significant according to one-way ANOVA (P=0.1981). The differences appeared in the fourth week, but the differences between groups were not statistically significant according to one-way ANOVA (P=0.0219). During the second week and the fourth week of the intervention, UPDRS Ⅲ scores in the three groups were not significantly different (P=0.6105, 0.4248 respectively). Adverse events in the three groups were rare, and the differences were not statistically significant. Conclusion High-frequency stimulation on dorsal-lateral left prefrontal cortex is effective in alleviating depression for patients with Parkinson's disease, and is also effective in improving capabilities in daily life, which shows exact clinical effect and rare adverse events.