BACKGROUND:Ligustrazine hydrochloride which promotes nerve repair can be applied to the treatment of nervous system injury. OBJECTIVE:To investigate the effect of ligustrazine hydrochloride combined with bone marrow mesenchymal stem cels transplantation on electrophysiological property and hindlimb function of rats with spinal cord injury. METHODS:T9 spinal cord transection injury models were made in rats using Alen’s method, and then rat models were randomized into three groups: rats in control group received tail vein injection of culture solution; rats in cel transplantation group underwent bone marrow mesenchymal stem cel transplantationvia the tail vein; rats in combined group were subjected to the tail vein injection of ligustrazine hydrochloride and bone marrow mesenchymal stem cels that lasted for 4 hours. At 1, 2, 4, 6, 8 weeks after modeling, Basso, Beattie and Bresnahan scores and modified Tarlov scores were used to detect the motor function of rats. At 72 hours after modeling, RT-PCR method was used to detect the expression of Bcl-2 and basic fibroblast growth factor around the injured region. At 4 weeks after modeling, somatosensory and motor evoked potentials were measured for evaluation of neurophysiological recovery. At 8 weeks after modeling, horseradish peroxidase tracer was used to assess the regeneration of rat spinal cord nerve fibers; PKH-26 labeling was used to observe the survival and migration of transplanted cels. RESULTS AND CONCLUSION:At 1, 2, 4, 6, 8 weeks after modeling, Basso, Beattie and Bresnahan scores and modified Tarlov scores were significantly higher in the combined group than the cel transplantation folowed by the control group (P < 0.05). At 72 hours after modeling, the expression of Bcl-2 and basic fibroblast growth factor around the injured region was significantly higher in the combined group than the cel transplantation group and control group (P < 0.05). At 4 weeks after modeling, the latencies of somatosensory and motor evoked potentials were ranked as folows: combined group < cel transplantation group < control group (P < 0.05); the amplitudes of somatosensory and motor evoked potentials were ranked as folows: combined group > cel transplantation group > control group (P < 0.05). At 8 weeks after modeling, horseradish peroxidase-labeled pyramidal cels in the cel transplantation group and combined group showed apparent crossing signs; the number of PKH-26-positive cels and horseradish peroxidase-positive cels was the most in the combined group folowed by the cel transplantation group, and was the least in the control group (P < 0.05). These findings indicate that ligustrazine hydrochloride combined with bone marrow mesenchymal stem cels transplantation can facilitate nerve cel regeneration, promote the expression of Bcl-2 and basic fibroblast growth factor, and improve motor function in rats after spinal cord injury. Cite this article:Wu XM, Gao WS, Wang J, Cai HY.Neuroprotection of ligustrazine hydrochloride combined with bone marrow mesenchymal stem cel transplantation in rats with spinal cord injury. Zhongguo Zuzhi Gongcheng Yanjiu. 2016;20(1):95-101.

In recent years, the research focus on health-related behavior and chronic non-communicable diseases has shifted from the analysis on independent effects of multiple causes on a single outcome to the evaluation the complex relationships between multiple causes and multiple effects. Complex network theory, an important branch of system science, considers the relationships among factors in a network and can reveal how health-related behaviors interact with chronic diseases through a series of complex network models and indicators. This paper summarizes the definition and development of complex network theory and its commonly used models, indicators, and case studies in the field of health-related behavior and chronic disease to promote the application of complex network theory in the field of health and provide reference and tools for future research of the relationship between health-related behavior and chronic disease.

Objective:To describe the prevalence of food allergy among children aged 0-5 years in China and to explore related influencing factors.Methods:Multistage stratified random sampling method was used to collect data from 275 surveillance sites of the China National Nutrition and Health Survey of Chinese children and lactating mothers programs in 31 provinces (autonomous regions and municipalities) of China in 2016-2017. A total of 70 107 participants aged 0-5 years were included in this study. The study collected information of participants' demographic characteristics and food allergies by face-to-face questionnaire. The prevalence of food allergy was analyzed, using the complex data weighting method. The logistic regression models were used to analyze the influencing factors related to food allergy.Results:The overall prevalence of self-reported food allergy among children aged 0-5 years was 4.81%. Prevalence rates in infants aged 0-5 months, and 6-23 months and preschool children aged 2-5 years were 0.81%, 4.68% and 5.26%, respectively. The results of logistic analysis showed that there was a significantly positive correlation between factors including children from 6 months to 5 years old, urban area, southwest area, first-born, mothers with college education or above, and the prevalence of food allergy in children. Shrimp, poultry eggs, crab shellfish, fruit, milk and fish appeared the common allergic foods in children aged 0-5 years, with prevalence rates of self-reported food allergy as 1.55%, 1.25%, 0.99%, 0.97%, 0.87% and 0.86%, respectively. The proportion of single food allergy in children with allergies was 69.85%.Conclusions:Among children aged 0-5 years, the prevalence of self-reported food allergy increases with age, in China. Foods that is prone to allergies include fish, shrimp, crab, shellfish, poultry eggs, milk and fruits, etc. Most allergies were only caused by single food in children, under observation.

Objective:To explore an early mobilization plan for oral cancer patients after free flap reconstruction and evaluate the application effect of the plan.Methods:This study was a prospective randomized controlled trial. A total of 173 patients undergoing free flap reconstruction surgery from December 2018 to December 2021 in the second ward of Peking University School and Hospital of Stomatology were selected. The patients were randomly divided into the control group (87 cases) and the intervention group (86 cases) by cluster randomized grouping. The control group received the routine nursing plan, that was, head immobilization for 4 days after surgery, and patients performed sat up and off-bed activity on the 5th day. The intervention group received the early mobilization plan, that was, patients sat up on the 2nd day after surgery and performed off-bed activity on the 3rd day. The incidence of vascular compromise, postoperative complications, sleep time in the first 5 days after surgery, catheter removal time, hospitalization duration and expenses were compared between the two groups.Results:The incidence of postoperative pulmonary infection, the daily sleep time in the first 5 days after surgery, the time for removing nasogastric tube, trachea cannula, and urinary catheter were 7.0%(6/86), (5.0 ± 1.0) h/d, (11.8 ± 7.3) d, (6.1 ± 3.2) d, (3.6 ± 0.6) d in the intervention group, and 13.8%(12/87), (4.4 ± 1.3) h/d, (14.2 ± 5.8) d, (7.3 ± 1.7) d, (4.0 ± 0.9) d in the control group, all differences were statistically significant ( χ2 = 3.89, t values were -3.57 - -2.44, all P<0.05). There was no significant difference in the incidence of rascular compromise, hospitalization duration and expenses between the two groups (all P>0.05). Conclusions:For patients undergoing free tissue flap reconstruction, it is safe to sit up on the 2nd day and get out of bed on the 3rd day, which can reduce the incidence of pulmonary infection, improve patient sleep, and shorten the indwelling time of nasogastric tube, trachea cannula and urinary catheter.

Objective:To investigate the clinical value of abdominal adipose volume in predicting early tumor recurrence after resection of hepatocellular carcinoma (HCC).Methods:The retrospective case-control study was conducted. The clinicopathological data of 132 HCC patients with tumor diameter ≤5 cm who were admitted to The First Affiliated Hospital of Army Medical University from December 2017 to October 2019 were collected. There were 110 males and 22 females, aged (51±4)years. All patients underwent resection of HCC. Preoperative computer tomography scanning was performed and the visceral and subcutaneous fats of patients were quantified using the Mimics Research 21.0 software. Based on time to postoperative tumor recurrence patients were divided to two categories: early recurrence and non-early recurrence. Observation indicators: (1) consistency analy-sis; (2) analysis of factors influencing early tumor recurrence after resection of HCC and construction of prediction model. Measurement data with normal distribution were represented as Mean± SD, and comparison between groups was conducted using the t test. Measurement data with skewed distribu-tion were represented as M( Q1,Q3) or M(range), and comparison between groups was conducted using the Mann-Whitney U test. Count data were expressed as absolute numbers, and comparison between groups was conducted using the chi-square test or Fisher exact probability. Consistency analysis was conducted using the intragroup correlation coefficient (ICC) test. Multivariate analysis was performed using the binary Logistic regression model forward method. Independent risk factors influencing early tumor recurrence after resection of HCC were screened. The area under curve (AUC) of receiver operating characteristic (ROC) curve was applied to select the optimal cut-off value to classify high and low risks of recurrence. The Kaplan-Meier method was used to draw survival curve and calculate survival time. The Log-Rank test was used for survival analysis. Results:(1) Consistency analysis. The consistency ICC of abdominal fat parameters of visceral fat volume (VFV), subcutaneous fat volume, visceral fat area, and subcutaneous fat area measured by 2 radiologists were 0.84, 1.00, 0.86, and 0.94, respectively. (2) Analysis of factors influencing early tumor recurr-ence after resection of HCC and construction of prediction model. All 132 patients were followed up after surgery for 662(range, 292-1 111)days. During the follow-up, there were 52 patients with non-early recurrence and 80 patients with early recurrence. Results of multivariate analysis showed that VFV was an independent factor influencing early tumor recurrence after resection of HCC ( odds ratio=4.07, 95% confidence interval as 2.27-7.27, P<0.05). The AUC of ROC curve based on VFV was 0.78 (95% confidence interval as 0.70-0.85), and the sensitivity and specificity were 72.2 % and 77.4 %, respectively. The optimal cut-off value of VFV was 1.255 dm 3, and all 132 patients were divided into the high-risk early postoperative recurrence group of 69 cases with VFV >1.255 dm 3, and the low-risk early postoperative recurrence group of 63 cases with VFV ≤1.255 dm 3. The disease-free survival time of the high-risk early postoperative recurrence group and the low-risk early post-operative recurrence group were 414(193,702)days and 1 047(620,1 219)days, showing a significant difference between them ( χ2=31.17, P<0.05). Conclusions:VFV is an independent factor influen-cing early tumor recurrence of HCC after resection. As a quantitative indicator of abdominal fat, it can predict the prognosis of HCC patients.