[Objective]To observe the nerve regeneration and functional recovery in the adult rats.[Method]The sciatic nerves on the left side of 15 rats were exposed and 1.0 cm long segments of the nerves were removed from the mid-thigh level and replaced by rabbit nerve made acellular through chemical extraction.At 4 months after procedure,the nerve regeneration and function recovery were examined with HE staining,NF-160 immunohistochemical staining,electrophysiological tests and sciatic functional index(SFI).[Result]In the rats repaired by acellular nerves,regenerated axons re-entered into the acellular xeno-nerve segments without excessive sign of inflammation following implantation.As stimuling(1.5 mA,0.1 ms,1.0 Hz) to the proximal sciatic nerves,the implanted segment resulted in motor evoked potentials,which were recorded from posterior tibial muscles.SFI showed a partial recovery of locomotion of the limb with sciatic nerve defect.[Conclusion]Sciatic nerves defect can be repaired by chemical acellular xenogeneous nerves in rats.There was partial functional recovery,which revealed the grafting with chemical acellular xenogeneous nerves may be a promising mehod for nerve defect in clinical.

Objective To investigate the apoptosis rate of neurons in vitro among the primary culture cells isolated from rat spinal cords before and after injury. Methods The spinal cord neurons of Wistar rats at 14-day gestation were isolated and cultured. The neuronal processes were then injured by cutting. At different time points after injury, TUNEL method was employed to detect the apoptotic neurons. Results Before injury, there was almost no apoptotic neuron. However, a large amount of apoptotic neurons were observed after the injury. The highest incidence of apoptosis appeared on the first day, and then it gradually reduced in the following days, but increased in amount again on the seventh day. Conclusion The results of the present experiment reveal the regularity of apoptosis of neurons before and after injury, and it provides a platform for further research regarding therapeutic intervention in the treatment of spinal cord injury.

Objective To observe the nerve regeneration and functional recov er y in canines, in which a large gap was made in the continuity of the sciatic ner ve and the gap was repaired by acellular allograft through chemical extraction. Methods 15 canines were divided into acellular nerve allografting group (ANG, 6 canines), autografting group (AG, 6 canines) and fresh nerve allografting group (FNG, 3 canines). The sciatic nerves on the right side of all animals were expos ed and 5.0 cm long segments were removed from the mid-thigh level and replaced by one of the three types of grafts. The motor recovery was assessed by gait tes t at month 6 postoperatively. The sensory and motor conducting functions were as sessed by electrophysiological experiments. The nerve regeneration was revealed by morphological studies on the grafting segments, the distal tibial nerves and motor end-plate of the target muscle. Results All the animals in ANG and AG gro ups had similar patterns of right posterior limb gait cycle and right ankle move ments. Stimuli (1.0-2.0 mA, 0.1 ms, 1.0 Hz) to the sciatic nerves proximal to t he implanted segment resulted in motor-evoked potentials recorded from the musc ulus triceps surae. The motor conducting velocities of the grafting segments wer e on average 47.2 m/s in ANG, 60.9 m/s in AG and 122.0m/s in normal controls. St imuli (5.0-10.0 mA, 0.2 ms, 1.9 Hz) to the right distal tibial nerves resulted in sensory-evoked potentials recorded from the cortical area in all the canines in ANG and AG groups. Axons regeneration and Schwann cells migration had reoccu pied the empty basal lamina tubes of the acellular allografting segments without excessive sign of inflammation. ANG and AG had similar nerve regeneration with massive large nerve fibers in the distal tibial nerves and vast motor end-plate in the target muscle. Conclusions The patterns of functional recovery and nerve regeneration tend to be similar 6 months after implantation in the canines, in which a 5.0 cm gap in the continuity of the sciatic nerve is repaired by either chemical acellular nerve allografting or autografting.

Objective To investigate the expression of interleukin-35 (IL-35) in serum of mice with pulmonary interstitial fibrosis.Methods Thirty-six C57BL/6 mice were divided into three groups (twelve mice in each group):control group,model group of mice with bleomycin-induced pulmonary fibrosis,glucocorticoid treatment group of mice with bleomycin-induced pulmonary fibrosis.The mice were sacrificed at day 7,day 14 and day 28 respectively,and the serum concentration of IL-35 was assayed.Statistical product and service solutions (SPSS) 17.0 statistical software was used for single factor analysis of variance and LSD-t comparison and Pearson correlation analysis was used for the comparison between each two groups.Results The serum IL-35 concentrations between groups and within groups at the time of day 7,day 14 and day 28 were compared respectively.The serum IL-35 concentration of the model group was significantly lower than the control group and the glucocorticoid treatment group at the time of day 7 (F=24.56,P＜0.05).The serum IL-35 concentration of glucocorticoid treatment group was significantly lower than the control group at the time of day 14 (F=8.85,P＜0.05),and which of glucocorticoid treatment group was significantly lower than the control group and the model group at the time of day 28 (F=36.64,P＜0.05).There was no significant difference between days 28 and day 7 within control group (t=1.03,P＞0.05).The serum IL-35 concentration of the model group at the time of day 28 was significantly higher than those of day 7 [(9.36±0.95) ng/ml vs (6.51±0.58) ng/ml,t=5.14,P＜0.05],and which of glucocorticoid treatment group was significantly lower than those of day 7 [(5.27±1.01) ng/ml vs (9.42±0.84) ng/ml,t=6.32,P＜0.05].From day 7 to day 28 the serum IL-35 concentration change of the model group and glucocorticoid treatment group showed significantly negative correlation (r =-0.743,P＜0.05).Conclusion Serum IL-35 concentration has shown an trend of increase during bleomycin-induced pulmonary fibrosis with mice model,and early glucocorticoid treatment can decrease the serum IL-35 in the model mice.

Objective Carotid body tumor is closely related to carotid artery .How to deal with carotid artery is the guaranty of successful surgery .The aim of this study was to summary the experience of keeping carotid artery continuity in the treatment of 15 carotid body tumor cases . Methods Clinical data of 15 cases with 17 carotid body tumors , in which 2 patients had bilateral tumors , were collected.The 17 carotid body tumors were classified as Shamblin I (6 cases),Ⅱ(6 cases) andⅢ(5 cases).Fifteen tumors were dissected simplely.Among these 15 tumors, three of Shamblin Ⅱand two of Shamblin Ⅲunderwent repair of the break of carotid artery.The rest two of Shamblin Ⅲunderwent tumor and external carotid artery excision and internal carotid artery repairment .Matas pressing test of carotid artery or carotid artery balloon occlusion test was not performed in any patient . Results All 17 tumors were successfully excised .None of the 17 tumors underwent anastomosis or reconstruction of internal carotid artery or arteria carotis com -mun.The continuity of carotid artery or internal carotid artery was kept in all the patients after tumor excision .Hoarseness and bucking induced by the injury of vagus nerve occurred in 13 cases, and bucking recovery in all the cases after 2 years follow up, and only one case remained mild hoarseness .Hypoglossal nerve injury occurred in 4 cases with tongue deviation , and the symptom recovery after 6 months follow up.No one had recurrent by the follow-up period ranging from 1 to 9 years. Conclusion Most carotid body tumors could be completely resected by tumor dissection method with the accurate treatment , thereby the continuity of carotid artery could be kept.The Matas pressing test of carotid artery or carotid artery balloon occlusion test is not necessarily to every patient .

Objective To study the mechanism of brain death-induced heart damage by observing the change patterns of morphological damage to the heart and related inflammatory factors after brain death and provide the experimental basis for heart transplantation by brain-dead donor.Methods The 30 rabbits were equally divided into two groups by the random digital table method:sham-operation group and brain death group.The rabbit brain death model was established in the brain death group,and the sham-operation group was given slow intracranial pressure.The rest treatments in the two groups were the same.At 2nd,6th and 8th h after operation,blood pressure,heart rate and respiratory rate were recorded.The damage of heart tissues was observed by HE staining.The plasma concentrations of IL-1,IL-6 and IL-8 were tested by ELISA.The expression of some inflammatory factors in heart issues was detected by RT-PCR and immunohistochemistry.Results At 8 h after brain death,there was no signifiant difference in blood pressure and heart rate between two groups (P＞0.05).The damage of heart issues in the brain death group was more serious than in the shamoperation group.With the prolongation of brain death,the plasma concentrations of IL-6 and IL-8 increased significantly in the brain death group (P＜0.05),but the concentration of IL-1β showed no siginificant difference between the two groups at 2 h after brain death (P＜0.05).Besides,the expression of HSP27 and HSP70 mRNA as well as the protein expression of ICAM and NF-κB was significantly increased in the brain death group as compared with that in the sham-operation group (P＜0.05).Conclusion With the prolongation of brain death time,the inflammatory factors in the heart tissues and plasma interleukin were increased,suggesting the inflammatory reaction occurs in donor heart under the condition of brain death,which influences the quality of donor in the heart transplantation.

OBJECTIVE: To analyze the status and influencing factors of the health literacy(HL) of college students in a comprehensive university. METHODS: A total of 3 360 students from in a comprehensive university of Xinjiang Production and Construction Corps was selected using multi-stage stratified cluster random sampling method. The HL level of college students was investigated and evaluated with self-edited Xinjiang Construction Corps College Students Health Literacy Questionnaire. RESULTS: The HL level of college students was 17.1%. The HL level of medical students was higher than that of non-medical students(35.4% vs 10.0%, P<0.01). Logistic regression analysis results showed that among the medical students in grade three or four, those with medium and excellent academic achievement, and Han nationality had a positive effect on their HL level(P<0.01). Among the non-medical students, female and medicine related optional courses had a positive effect on their HL level(P<0.05). Students in the sophomore year had a negative effect on their HL level(P<0.05). CONCLUSION: There is a big difference in the level of HL between medical students and non-medical students. Medical college students and non-medical college students have different factors affecting HL, medical education is related to improving HL.

OBJECTIVE: To screen new serum metabolic biomarkers for different drug resistance profiles of pulmonary tuberculosis (TB) and explore their mechanisms and functions. METHODS: We collected serum samples from TB patients with drug sensitivity (DS), monoresistance to isoniazid (MR-INH), monoresistance to rifampin (MR-RFP), multidrug resistance (MDR), and polyresistance (PR). The metabolites in the serum samples were extracted by oscillatory and deproteinization for LC-MS/MS analysis, and the results were normalized by Pareto-scaling method and analyzed using Metaboanalyst 4.0 software to identify the differential metabolites. The differential metabolites were characterized by function enrichment and co-expression analysis to explore their function and possible pathological mechanisms. RESULTS: Compared with the DS group, 286 abnormally expressed metabolites were identified in MR-INH group, 362 in MR-RPF group, 277 in MDR group and 1208 in PR group by LC-MS/MS analysis. Acetylagmatine ( < 0.05), aminopentol ( < 0.05), and tetracosanyl oleate ( < 0.05) in MR-INH group; Ala His Pro Thr ( < 0.001) and glycinoprenol-9 ( < 0.05) in MR-RFP group; trimethylamine ( < 0.05), penaresidin A ( < 0.05), and verazine ( < 0.05) in MDR group; and PIP (18:1(11Z)/ 18:3(6Z, 9Z, 12Z)) ( < 0.001), Pro Arg Trp Tyr ( < 0.001), N-methyldioctylamine ( < 0.001), and phytolaccoside E ( < 0.05) in PR group all showed significant differential expressions. Significant differential expressions of phthalic acid mono-2-ethylhexyl ester ( < 0.05) and eicosanoyl-EA ( < 0.05) were found in all the drug resistant groups as compared with DS group. CONCLUSIONS Acetylagmatine, aminopentol, tetracosanyl oleate, Ala His Pro Thr, glycinoprenol-9, trimethylamine, penaresidin A, verazine, PIP(18:1(11Z)/18:3(6Z, 9Z, 12Z)), Pro Arg Trp Tyr, N-methyldioctylamine, phytolaccoside E, phthalic acid mono-2-ethylhexyl ester, and eicosanoyl-EA are potentially new biomarkers that indicate monoresistance, multi-drug resistance and polyresistance of Mycobacterium tuberculosis. The combined use of these biomarkers potentially allows for assessment of drug resistance in TB and enhances the diagnostic sensitivity and specificity.
Biomarkers ; Chromatography, Liquid ; Humans ; Tandem Mass Spectrometry ; Tuberculosis, Multidrug-Resistant ; Tuberculosis, Pulmonary

OBJECTIVE：To overview and analyze the current evidence of systematic reviews of drug treatment for children with tic disorder （TD），and to provide evidence-based reference for clinical practice. METHODS ：Retrieved from Medline ，Embase， CBM，CNKI，VIP and Wanfang database ，and so on ，systematic reviews about the efficacy and safety of drug treatment for TD were collected. AMSTAR- 2 tools were used to evaluate the quality of included studies ；the intervention measures ，diagnosis standard，outcome index ，the types of included studies ，main conclusion ，control measures ，effect sizes of different drug treatment were also extracted and analyzed descriptively. RESULTS ：A total of 27 systematic reviews were included ，of which 5 were medium-quality，8 low-quality and 14 very-low-quality. Meta-analysis showed that although typical psychiatric drugs could control tic symptoms ，ADR were prominent and the safety was not good ；risperidone and aripiprazole as atypical psychiatric drugs had good efficacy and safety ，and the research evidence was relatively sufficient. Clonidine as α2 adrenergic agonist could effectively control tic symptoms with fewer ADR ，especially for patients with affention deficit and hyperactivity disorder （ADHD），and research evidence was sufficient. Tiapride could effectively improve tic symptoms ，and the overall tolerance was better. Tomoxetine and methylphenidate could significantly improve the tic symptoms of tic patients with ADHD. CONCLUSIONS ：In the clinical treatment of TD in children ，ADR induced by typical antipsychotics are prominent and the safety is not good ；risperidone， aripiprazole，clonidine and tiapride have good efficacy and safety. Clonidine ，tomoxetine and methylphenidate could significantly improve tic symptoms of TD patients with ADHD. But the quality of systematic review methodology for tomoxetine and methylp- henidate is not good and further improvement is needed.

Objective To investigate the effect and underlying mechanism of Qingguang’an Granules (青光安颗粒剂, QGAG) on mitochondrial autophagy (mitophagy) of retinal ganglion cells (RGCs) in rats with chronic ocular hypertension (COH). Methods Sixty Sprague Dawley (SD) rats, half males and half females, were randomly assigned to three groups: the control, model, and QGAG (2.5 g/kg) groups, with 20 rats in each group. Rats’ model of COH was established by cauterizing episcleral veins in the model group and QGAG group. Three weeks after successful modeling, rats in the QGAG group were intragastrically administered with QGAG, while rats in the control group and the model group received an equal dose of normal saline. After three months of intragastric administration, intraocular pressure (IOP) of all rats was measured. The mitophagy was monitored by the immunofluorescence method, the mitochondrial membrane potential was measured using the JC-1 method, and the morphological changes of mitophagy in RGCs were observed by transmission electron microscopy. Meanwhile, rat RGCs were labeled using the fluorescent gold method, and RGCs density in each group was calculated. Moreover, RGCs apoptosis was observed by TdT-mediated dUTP Nick-End Labeling (TUNEL) assay. Finally, the expression levels of Parkin, optineurin, microtubule-associated protein 1 light chain 3-II/microtubule-associated protein 1 light chain 3-I (LC3-II/LC3-I), recombinant lysosomal associated membrane protein 1 (LAMP1), and B-cell lymphoma-2 (Bcl-2) in RGCs were determined by Western blot assay. The corresponding mRNAs were detected through quantitative real-time polymerase chain reaction (qRT-PCR). Results The QGAG reduced IOP in COH rats, and inhibited mitophagy and apoptosis of RGCs (P < 0.05). Besides, the QGAG significantly increased the expression levels of Parkin and Bcl-2 (P < 0.05), and inhibited the expression levels of optineurin, LAMP1, and LC3-II/LC3-I (P < 0.05) in RGCs of COH rats. Conclusion The QGAG can inhibit mitophagy in RGCs of COH rats and show a protective effect against optic nerve damage caused by glaucoma, which may be mediated through the mitophagy ubiquitination via the Parkin/PINK1-related pathway.