PurposeHeroin addiction is a chronic and recurrent functional brain disease, there are some functional changes in specific brain regions, but the network character remains unclear. The aim of this paper is to explore the network character of brain resting-state functional network in heroin addicts, to identify the potential neuromechanism of heroin addiction from the perspective of brain network.Materials and Methods Thirty heroin addicts (HA group) and twenty-nine healthy controls (control group) underwent resting-state functional MRI scanning using GE 3.0T MRI scanner. The brain functional networks were constructed based on graph theory, the small-world properties and node properties were calculated and compared between the two groups, the correlation between the total dosage of heroin and node degree was analyzed.Results Compared with control group, the small world characteristics of HA group was altered with statistically significant difference (P<0.05, corrected by false discovery rate); the node degrees in orbit frontal regions increased, while those in occipital brain regions decreased (P<0.05, corrected by false discovery rate). No correlation was found in HA group between node degree and the total dosage of heroin.Conclusion These results suggest that topology of functional brain networks were altered in heroin addicts which tends to random networks; increased motivational driving to the salience of drug and decreased visuospatial attention in heroin addicts may provide a strategy for identifying the neuromechanism of heroin addiction.

Objective To examine the relationship between the concentration of 25-hydroxy vitamin D3 [25-(OH) D3] in the serum and the body mass,the severity of obesity,body mass index(BMI),blood lipid,and their predicting role in obesity children.Methods The study recruited 244 subjects,who see the doctor in Wuxi Maternal and Child Health Hospital,Childhood Nutrition Outpatient from Jul.2011 to Feb.2013.The intake dose of vitamin D each day was investigated,and weight,height,BMI,concentration of 25-(OH) D3 in serum,and microelement were also measured.In addition,lipid metabolism of 38 cases with obesity over 3 years old was determined.Results 1.The serum 25-(OH) D3 concentration of obese children was (68.31 ± 23.06) nmol/L.The concentration of 25-(OH) D3 was lowest in the group of obese children over 36 months of age[(55.03 ± 15.18) nmol/L].2.The concentration of 25-(OH) D3 in the group of obese and overweight children was far lower than that of the children in the normal group (F =4.739,P ＜0.05).3.The concentrations of 25-(OH) D3 in the severely obese children was significantly lower than that of the mild and moderate obesity children(F =9.711,P ＜ 0.05).4.There were significantly inverse associations of serum 25-(OH) D3 with weight,weight and height percentage,BMI (r =-0.365,-0.237,-0.175,all P ＜ 0.001).5.There were significantly inverse associations between the concentration of 25-(OH) D3 in serum with weight,triglyceride in obese children more than 3 years old (r =0.476,-0.324,all P ＜ 0.05).Conclusions The decreasing level of 25-hydroxy vitamin D3 in the serum was associated with obesity.The cause of it might be the increase of the obese adipose tissue,vitamin D getting trapped in fat cells,and all these factors can lead to a less serum vitamin D levels.The vitamin D consumption of obese children is higher than that of normal children,and should supply more vitamin D to reach normal 25-(OH) D3 level.

Continuous medical imaging education is important for radiologists to improve their image diagnosis ability.In order to adapt to the development of medical education,the department of radiology in Tangdu hospital had built a set of teaching-picture archiving and communication system (TPACS) with its own intellectual property rights based on its own advantages.This system was actively put into use for scholar radiologists and the efficiency and quality of education as well as the development of continuous education for scholar radiologists were improved and promoted conspicuously.

Objective To explore the neural mechanism underlying the craving of heroin addicts induced by picture-cue and the correlation between the brain activation degree in nucleus accumbens (NAc)/the ventral striatum and the scores of patients' self-report craving. Methods Twelve active heroin addicts and 12 matched healthy controls underwent fMRI scan while viewing drug-related pictures and neutral pictures presented in a block design paradigm after anatomical scanning in GE 3.0 T scanner. The fMRI data were analyzed with SPM 5. The change of craving scores was tested by Wilcoxon signed rank test. The Pearson correlation between the activation of NAc/the ventral striatum and the heroin craving score was tested by SPSS 13.0. Results The craving scores of heroin addicts ranged from 0 to 3.70(median 0.15) before exposed to drug cue and 0 to 5.10(median 3.25) after viewing drug-related pictures and showed statistical significance(Z = -2.666, P < 0.05). There were 16 activated brain areas when heroin dependent patients exposed to visual drug-related cue vs. neutral visual stimuli. The activation brain regions belonged to two parts, one was limbic system (amygdale, hippocampus, putamen, anterior cingulate cortex and caudate), another was brain cortex (middle frontal cortex, inferior frontal cortex, precentral gyrus, middle temporal cortex, inferior temporal cortex, fusiform gyrus, precuneus and middle occipital gyrus). The MR signal activation magnitude of heroin addicts ranged from 0.19 to 3.50. The result displayed a significant positive correlation between the cue-induced fMRI activation in NAc/the ventral striatum and heroin craving severity (r=0.829, P < 0.05). Conclusion Heroin shared the same neural circuitry in part with other drugs of abuse for cue-induced craving, including brain reward circuitry, visualspatial attention circuit and working memory region. In addition, the dysfunction of NAc/the ventral striatum may attribute to heroin-related cue induced craving.

Objective To study the antihypertensive efficacy and influence on the blood pressure parameters of nifedipine GITS therapy in patients with subacute cerebral infarction with essential hypertension by ambulatory blood pressure monitoring (ABPM).Methods Fifty-one cases of subacute cerebral infarction with essential hypertension were treated with nifedipine GITS for 14 days.ABPM were performed in all cases before and after treatment.The blood pressure parameters of blood pressure variability (BPV),morning blood pressure surge(MBPS),Trough/Peak(T/P),and smoothness index(SI) were analyzed.Results (1) After treatment with nifedipine GITS 30 mg/d for two weeks,the average 24-hour systolic blood pressure (SBP),day-time systolic blood pressure (dSBP),night-time systolic blood pressure (nSBP),24-hour diastolic blood pressure (DBP),day-time diastolic blood pressure (dDBP),night-time diastolic blood pressure (nDBP) significantly decreased((144.70 ± 14.89) mm Hg vs (163.10 ± 16.48) mm Hg,(145.67 ± 15.20) mm Hg vs (164.55 ±16.81) mm Hg,(140.85 ± 19.46) mm Hg vs (156.73 ±20.55) mm Hg,(81.24 ±8.88) mm Hg vs(89.49 ± 10.06) mm Hg,(81.25 ±9.40) mm Hg vs (90.18 ± 10.64) mm Hg,(81.34 ± 12.10) mm Hg vs (86.28 ±12.11) mmHg;t=11.01,11.53,5.29,8.71,7.53,2.31;P＜0.05)).(2) Defining the standard deviation(SD) of average blood pressure as the indexes of BPV,the blood pressure variability of systolic blood pressure(SBPV),day-time systolic blood pressure variability (dSBPV),night-time systolic blood pressure (nSBPV) decreased significantly ((16.52 ± 4.38) mm Hg vs (19.78 ± 6.72) mm Hg,(15.45 ± 4.71)mm Hg vs (17.88 ± 7.25)mm Hg,(14.94 ± 5.89) mm Hg vs (19.17 ± 8.27) mm Hg; t =3.38,2.19,2.99 ;P ＜0.05)) and the diastolic blood pressure didn't change.(3) There was negative correlation between smoothness index (SI) and BPV (r =-0.28 ; P ＜ 0.05).(4) The decreases of morning blood pressure surge (MBPS) of SBP was more significant after treatment ((22.65 ± 12.77) mm Hg) than that before treatment ((31.94 ±16.36) mm Hg).(5) The median of T/P ratio calculated by group methods was 0.721 for SBP and 0.676 for DBP,and it was 0.588 ± 0.360 for SBP and 0.628 ± 0.433 for DBP calculated by individual method.The medians of T/P ratio were above 0.5 by both methods.Conclusion It is of great significance to effectively control blood pressure and BPV in patients with stroke.Nifedipine GITS can constantly release medicine;it can lower the blood pressure,and significantly reduce BPV and MBPS.

Objective:To analyze the clinical characteristics and SLC25A13 gene mutation in children with neonatal intrahepatic cholestasis caused by citrin deficiency(NICCD).Methods:The data of 18 children diagnosed with NICCD in Xi′an Children′s Hospital from January 2014 to December 2018 were collected.The clinical manifestations, biochemical characteristics, SLC25A13 gene mutation and prognosis were analyzed.Results:All the 18 cases of NICCD were from North China and the age of initial diagnosis averaged(63.4±19.5)days.The clinical manifestations included jaundice(100%), light yellow or white stool(38.9%), growth retardation(27.8%)and so on.All patients had cholestasis.Of 18 cases, the levels of glutamyltranspeptidase, total bile acid and alpha fetoprotein were all increased, and serum albumin was decreased.Elevated aspartate aminotransferase(94.4%), elevated glutamic pyruvic transaminase(72.2%), prolonged prothrombin time(88.9%), hyperlactemia(83.3%), hypoglycemia(77.8%), anemia(66.7%)and other biochemical abnormalities were observed.Citrulline and other serum amino acids of all cases were elevated in blood samples by tandem mass spectrometry.The increase of 4-hydroxyphenyllactate and 4-hydroxyphenylpyruvate was found in 70%(7/10)urine samples by gas chromatography.Age was negatively correlated with total bile acid( r=-0.469, P=0.049), and positively correlated with blood ammonia, threonine, methionine, ornithine and tyrosine( r=0.472, 0.690, 0.698, 0.678 and 0.769, respectively, P<0.05). A total of 16 SLC25A13 gene mutations were detected, of them c. 851_854del(33.3%)and c. 1638_1660dup(19.4%)were the most common.c.1841+ 3_1841+ 4del, c.980_981del(p.E327Vfs*45)and c. 602A>T(p.E201V)were novel mutations.Among the 17 children who were followed up, 1 case died and 16 cases had normal biochemical parameters within 1 year. Conclusion:The characteristic biochemical changes are helpful for early recognition of NICCD.The prognosis of NICCD is good if the treatment is appropriate and timely.c.851_854del and c. 1638_1660dup are high-frequency mutations of SLC25A13 gene in north China.

Objective:To study the functional connectivity (FC) and metabolic effective connectivity (MEC) patterns of the default mode network (DMN) in healthy male adults based on a novel hybrid PET/MR system.Methods:Fifteen healthy male adults with median age of 29 years were recruited locally in Xi′an from January to May 2019. All subjects went through PET/MR scan to get the whole brain 18F-fluorodeoxyglucose (FDG) PET, resting-state functional MRI (fMRI) and magnetization prepared rapid gradient echo (MPRAGE) T 1 weighted imaging data. CONN18b and statistical parametric mapping (SPM) 12 softwares were used to analyze data. The voxel-wise FC and FDG metabolic data were extracted within 4 sub-networks of DMN, which included medial prefrontal cortex (MPFC), posterior cingulate cortex (PCC) and bilateral lateral parietal (LP). The FC and MEC between 4 sub-networks were calculated based on merged resting-state fMRI and metabolic data, and analyzed by one-sample t test separately, with Bonferroni correction. Results:FC pathways were all significant within 4 sub-networks of DMN ( t values: 6.00-7.71, all P<0.008, Bonferroni corrected). Meanwhile, there were significant bi-directional MEC between MPFC and PCC(MPFC to PCC: t=10.03; PCC to MPFC: t=3.73, both P<0.004, Bonferroni corrected), as well as between bilateral LP (LP_L to LP_R: t=5.28; LP_R to LP_L: t=4.76, both P<0.004, Bonferroni corrected). There were significant uni-directional MEC from both MPFC and PCC to bilateral LP ( t values: 3.44-6.93, all P<0.004, Bonferroni corrected). Conclusions:Special FC and MEC patterns exist within DMN. The closely interrelated MPFC and PCC play more important roles in DMN, and they may mediate LP jointly. The novel integrated PET/MR system will bring new perspective on the organization of brain networks, which may deepen the comprehensive understanding of DMN.

Objective To explore the changes and effect of functional connectivity(FC) of reward network in chronic heroin addicts(HA) using resting-state fMRl(rs-fMRI). Methods rs-fMRI was performed on 26 chronic heroin addicts(HA group) and 25 matched normal volunteers(control group).The rs-fMRI data were proceeded by usingrs-fMRI(DPARSF) software on Matlab 2009a. Bilateral nucleus accumbens(Nacc) were set as ROIs. Then the mean time series of ROI were compared with other voxels within the brain by the rs-fMRI data analysis toolkit(REST). Intra-and inter-group analysis was performed with single sample and two sample t test respectively.The association of intensity of FC in brain regions and the duration/doses of heroin consumption was investigated. Results In HA group, positiveresting-state FC compared with the ROIs was found in frontal gyms, dorsal striatum, thalamus and pons, while temporal lobe, negative found in part of parietal cortex and occipital cortex, part of dorsal lateral prefrontal cortex and cerebellum. Within control group, positive FC compared with the ROIs was found in frontal gyms, dorsal striatum, thalamus, hippocampal gyrus and pons, occipital cortex, negative FC with ROIs found in part of dorsal lateral prefrontal cortex and cerebellum(P<0.005, voxels>26). Compared with the control group,the FC between the right Nacc and the bilateral calcarinegyrus, left middle occipital gyrus(voxel numbe r=31,28,47;t=3.99, 3.74,3.74;and P<0.005,respectively)were significantly increased in the HA group.The FC between the left Nacc and left fusiform gyrus and right precuneus(voxel number=40,26;t=3.77,3.57;and P<0.005, respectively)were significantly increased, while between the left Nacc and left dorsal medial/lateral prefrontal cortex and bilateral dorsal anterior cingulate(voxel number=98;t=-4.14;and P<0.005)were significantly decreased in the HA group. There was no corrlation between the abnormal FC and the duration/doses of heroin consumption in HA group(P>0.05). Conclusion The abnormal interaction between Nacc and the regions involved in cognitive control and visual spatial attention may contribute to the heroin addiction.

Objective To assess the development,progression and change of nonmotor symptoms in patients with Parkinson' s disease and its impact on patients' quality of life.Methods Eighty-seven consecutive patients with idiopathic Parkinson' s disease were studied.Parkinsonian status was assessed at baseline and 3 years follow-up using Unified Parkinson' s Disease Rating Scale (UPDRS) part Ⅲ & Ⅳ,Nonmotor Symptoms Questionnaire (NMSQuset),Parkinson-related quality of life (PDQ) scales.Paired ttest,Chi-square test,Spearman rank order correlation and hierarchical regression of the major statistical procedures were employed.Results At 3 years follow-up,compared to baseline,the UPDRS Ⅲ score (22.21 ±11.31 vs 30.49± 11.68),UPDRS Ⅳ score(1.00±1.54 vs 2.94±3.12),NMS score (7.98±3.96 vs 12.35 ± 5.12) and PDQ score (28.11 ± 22.88 vs 36.65 ± 26.95) were significantly higher ( t =- 5.54,- 5.75,- 6.46,- 5.29,all P =0.000,respectively).The aggravation of motor and nonmotor symptoms caused the decline of quality of life.The prevalence of constipation,problem of remembenng thing,nocturia ranked tops,and depression,and anxiety were still in the middle,compared with baseline.The prevalence of pains,sweating,dribbling,sense of incomplete emptying etc were significantly increased during the follow-up,△R2 were 21.6％ and 23.4％ respectively,resulting in the deterioration of quality of life.Conclusions PD nonmotor symptoms appear from the early stage.The motor and nonmotor symptoms aggravate over time.

Objective To observe progression of motor symptoms and occurrence of motor complications in parkinsonian patients and investigate the rate of progression of motor symptoms and risk factors of motor complications.Methods One hundred and thirty patients diagnosed with PD in 2007 in Department of Neurology,Xinhua Hospital were followed up for 3 years.The Unified Parkinson' s Disease Rating Scale (UPDRS) and H-Y staging were used to assess and follow up motor symptoms and occurrence of motor complications,and analyze the rate of progression of motor symptoms and risk factors of motor complications with statistics.Results ( 1 ) Mean annual growth in H-Y staging was 2.5％,and UPDRS motor scores was 3.1％ ; the incidence of dysphagia at endpoint in patients was increased by 23.0％ compared with baseline; incidence of falls was increased by 16.7％;(2)Daily levodopa dose at endpoint ( OR =1.004,95％ CI 1.001—1.006,P =0.008 ) was independent risk factors with dyskinesia; While duration ( OR =1.637,95％ CI 1.083—2.473,P =0.019 ),levodopa treatment duration ( OR =0.698,95％ CI 0.494—0.987,P =0.042 ),daily levodopa dose at haseline ( OR =1.005,95％ CI 1.001—1.010,P =0.016) and at endpoint ( OR =1.014,95 ％ CI 1.001 —1.027,P =0.032 ) were risk factors with motor fluctuations.Conclusions As the disease progresses,motor function in parkinsonian patients gradually worsens,the incidence of swallowing difficulty and of falls is increased,and the incidence of motor complications is increased.The total exposure to levodopa in parkinsonian patients is predictor for motor complications.