BACKGROUND:Lijin manipulation can promote skeletal muscle repair and treat skeletal muscle injury.However,the formation of fibrosis and scar tissue hyperplasia are closely related to the quality of skeletal muscle repair.To study the regulatory effect of Lijin manipulation on the formation of fibrosis and scar tissue hyperplasia is helpful to explain the related mechanism of Lijin manipulation to improve the repair quality of skeletal muscle injury. OBJECTIVE:To explore the mechanism of Lijin manipulation to improve the repair quality of skeletal muscle injury in rabbits,thereby providing a scientific basis for clinical treatment. METHODS:Forty-five healthy adult Japanese large-ear white rabbits were randomly divided into blank group,model group and Lijin group,with 15 rats in each group.Gastrocnemius strike modeling was performed in both model group and Lijin group.The Lijin group began to intervene with tendon manipulation on the 3rd day after modeling,once a day,and 15 minutes at a time.Five animals in each group were killed on the 7th,14th and 21st days after modeling.The morphology and inflammatory cell count of gastrocnemius were observed by hematoxylin-eosin staining,the collagen fiber amount was observed by Masson staining,the expression of interleukin-6 and interleukin-10 in gastrocnemius was detected by ELISA.The protein and mRNA expressions of paired cassette gene 7,myogenic differentiation factor,myoblastogenin,alpha-actin,transforming growth factor beta 1,and type Ⅰ collagen were detected by western blot and RT-PCR,respectively,and the expression of type Ⅰ collagen protein was detected by immunohistochemistry. RESULTS AND CONCLUSION:Hematoxylin-eosin staining and Masson staining showed that compared with the model group,inflammatory cell infiltration and collagen fiber content decreased in the Lijin group(P<0.01),and the muscle fibers gradually healed.ELISA results showed that compared with the model group,the expression of interleukin-6 in the Lijin group continued to decrease(P<0.05),and the expression of interleukin-10 increased on the 7th day after modeling(P<0.05)and then showed a decreasing trend(P<0.05).Western blot and RT-PCR results showed that compared with the model group,the protein and mRNA expressions of paired cassette gene 7,myogenic differentiation factor,myoblastogenin in the Lijin group were significantly increased on the 14th day after modeling(P<0.05),but decreased on the 21st day(P<0.05);the protein and mRNA expressions of alpha-actin,transforming growth factor beta 1,and type Ⅰ collagen in the Lijin group were significantly decreased compared with those in the model group(P<0.05).Immunohistochemical results showed that the expression of type Ⅰ collagen in the Lijin group was significantly lower than that in the model group(P<0.05).To conclude,Lijin manipulation could improve the repair quality of skeletal muscle injury by inhibiting inflammation,promoting the proliferation and differentiation of muscle satellite cells,and reducing fibrosis.

Objective:To investigate the diagnostic value of cervical cell DNA ploidy analysis combined with negative costimulatory molecule B7 homolog 4 (B7-H4) and protein kinase Cδ (PKCδ) for cervical cancer.Methods:A total of 160 cervical cancer patients diagnosed and treated at Shijiazhuang People's Hospital from January 2018 to January 2022 were selected as the cervical cancer group. Meantime, 160 women who were screened for cervical cancer in our hospital during this period were selected as the control group. According to the examination results, they were divided into normal or inflammatory group ( n=52), low-grade cervical intraepithelial neoplasia (CIN) group ( n=68) and high-grade CIN group ( n=40). The automatic cell image analysis system was used to analyze the DNA ploidy of cervical cells. The levels of B7-H4 and PKCδ in serum were determined by enzyme-linked immunosorbent assay. Pearson method was used to analyze the correlation between serum B7-H4 and PKCδ; the diagnostic value of cervical cell DNA ploidy analysis combined with serum B7-H4 and PKCδ in cervical cancer was evaluated by the receiver operator characteristic (ROC) curve; multivariate logistic regression was used to analyze the risk factors of cervical cancer. Results:The numbers of DNA ploidy positive cases of cervical cells in normal or inflammatory group, low-grade CIN group, high-grade CIN group and cervical cancer group were 16 (30.8%), 27 (39.7%), 26 (65.0%) and 127 (79.4%), respectively, with a statistically significant difference ( H=55.86, P<0.001). Further pin-by-pair comparison showed that compared with normal or inflammatory groups, the proportion of DNA ploidy positive in high-grade CIN group and cervical cancer group were higher (both P<0.05). The proportion of DNA ploidy positive in cervical cancer group was higher than that in low-grade CIN group ( P<0.05). Serum B7-H4 levels in normal or inflammatory group, low-grade CIN group, high-grade CIN group and cervical cancer group were (57.21±10.21), (79.17±11.34), (92.73±15.36), (126.56±20.25) ng/ml, respectively, with a statistically significant difference ( F=285.45, P<0.001). Serum PKCδ levels were (89.34±18.29), (71.79±15.82), (53.39±11.84), (40.23±10.21) ng/ml, respectively, with a statistically significant difference ( F=216.28, P<0.001). Further pin-by-pair comparison showed that serum B7-H4 levels in normal or inflammatory groups, low-grade CIN group, high-grade CIN group and cervical cancer group increased in turn (all P<0.05). Serum PKCδ levels in normal or inflammatory groups, high-grade CIN group and cervical cancer group were decreased in turn (all P<0.05). Pearson correlation analysis showed that the serum B7-H4 and PKCδ levels in patients with cervical cancer were negatively correlated ( r=-0.47, P<0.001). ROC curve analysis showed that the area under the curve (AUC) of cervical cell DNA ploidy for cervical cancer diagnosis was 0.82 (95% CI: 0.78-0.86), and the sensitivity and specificity were 83.9% and 79.9%, respectively. The AUC of serum B7-H4 in the diagnosis of cervical cancer was 0.92 (95% CI: 0.89-0.95), the sensitivity and specificity were 95.7% and 76.1%, respectively, and the cutoff value was 111.12 ng/ml. The AUC of serum PKCδ for diagnosis of cervical cancer was 0.92 (95% CI: 0.89-0.95), the sensitivity and specificity were 85.6% and 88.9%, respectively, and the cut-off value was 54.83 ng/ml. The AUC of the combined diagnosis of cervical cancer was 0.99 (95% CI: 0.97-0.99), and the sensitivity and specificity were 98.3% and 75.9%, respectively. The AUC of the combined diagnosis of cervical cancer was higher than that of DNA ploidy ( Z=8.00, P<0.001), serum B7-H4 ( Z=4.34, P<0.001), and serum PKCδ ( Z=4.61, P<0.001) alone. Multivariate logistic regression analysis showed that high level of B7-H4 in serum ( OR=2.94, 95% CI: 1.78-4.84, P<0.001), low level of PKCδ ( OR=4.33, 95% CI: 1.88-10.00, P=0.001) and positive DNA ploidy in cervical cells ( OR=5.77, 95% CI: 2.38-13.99, P<0.001) were independent risk factors for cervical cancer. Conclusion:The positive proportion of DNA ploidy in cervical cells of patients with cervical cancer is increased, the serum B7-H4 level is increased, the PKCδ level is decreased, and cervical cell DNA ploidy analysis combined with serum B7-H4 and PKCδ has a high diagnostic value for cervical cancer.

Objective:To investigate the effects of computerized cognitive remediation therapy (CCRT) combined with social skill training on the improvement of negative symptoms of schizophrenia.Methods:A total of 102 schizophrenic patients who received treatment in Shanxi Province Social Welfare Kangning Psychiatry Hospital from March 2019 to June 2021 were included in this study. They were randomly divided into an intervention group and a control group ( n = 51/group). During the intervention process, because of the reasons such as midway discharge, only 93 patients were included in the final analysis, consisting of 47 patients in the intervention group and 46 patients in the control group. All patients received social skills training. Patients in the intervention group received 8-week CCRT. The Positive and Negative Syndrome Scale and Social Skills Checklist were used to evaluate curative effect in the two groups. Results:After treatment, total score of the Positive and Negative Syndrome Scale and the score of negative symptoms in the intervention group were (46.36 ± 9.33) points and (11.15 ± 3.53) points, respectively, which were significantly lower than (51.06 ± 10.26) points and (16.42 ± 4.75) points in the control group ( t = 2.07, 5.41, both P < 0.05). The total score of Social Skills Checklist, conflict resolution ability score and relationship building ability score in the intervention group were (16.05 ± 6.85) points, (3.36 ± 1.65) points and (3.14 ± 1.83) points, respectively, which were significantly lower than (21.08 ± 8.24) points, (5.92 ± 2.35) points and (6.75 ± 2.51) points, respectively ( t = 2.87, 5.34, 7.00, all P < 0.01). Conclusion:CCRT combined with social skill training can effectively improve the negative symptoms of patients with schizophrenia.

Objective To explore the functional connectivity characteristics and intensity of brain network in depression at rest.Methods Patients with major depressive disorder(MDD)and healthy controls(HCs)underwent resting state functional magnetic resonance imaging.The total brain degree centrality(DC)of the two groups was calculated to assess the functional connection strength.Support vector machine(SVM)method was used to investigate whether abnormal DC value can recognize MDD.Results A total of 26 patients and 37 controls were included in the analysis.Compared to HCs,MDD group showed decreased DC value in the left middle frontal gyrus(t=-4.98,P＜0.05,GRF corrected)and increased DC value in the right middle temporal gyrus(t=5.02,P＜0.05,GRF corrected),right parahippocampal gyrus(t=4.80,P＜0.05,GRF corrected),and right posterior cerebellar gyrus(t=4.98,P＜0.05,GRF corrected).Additionally,no significant correlations were found between abnormal DC values and clinical variables(i.e.,17-item Hamilton depression scale and Beck depression scale scores)in MDD group(P＞0.05).SVM analysis showed that decreased DC value in the left middle frontal gyrus might be used to distinguish MDD group from HCs with an accuracy of 84.13%,a specificity of 81.08%,and a sensitivity of 88.46%,the area under the operational characteristic curve is 0.87.Conclusions Altered DC values in the left middle frontal gyrus and right middle temporal gyrus,right parahippocampal gyrus,right posterior cerebellum may contribute to the pathophysiology of MDD.The change of functional connection strength of the left medial frontal gyrus may be helpful for the recognition of MDD.

Abstract:To compare the morphology of spinal cord between healthy adolescents with adolescent Chiari malformation type I (CMI) patients and investigate the impact of syringomyelia on the morphology of spinal cord in CMI patients.Methods:The clinical and radiological data of 292 CMI patients diagnosed by our center between June 2012 and March 2019 were retrospectively reviewed. Among them 15 CMI patients without syringomyelia were recruited in the CM group. Among the remaining 277 CMI patients, 274 patients had syringomyelia below the C 3-4 intervertebral disc. According to the principle of best matching, CMI patients with syringomyelia were selected with the closest age to the CM group (±18 months), and 30 CMI patients with syringomyelia were included in the CMS group according to a ratio of 1∶2. Thirty healthy adolescents were enrolled as the control group (NC group) in the same way. The anteroposterior diameters of spinal cord at C 2 (DSCO-C 2), spinal canal at C 2 (DSCA-C 2), midbrain-pontine junction (DPJ), the distance between the tip of cerebellar tonsils and the foramen magnum (AB) and the maximal diameter of the syrinx (D-syrinx) were measured on MRI. All radiographic parameters were measured twice independently by two spine surgeons, and intraclass correlation coefficient (ICC) were determined to demonstrate intra- and inter-observer reliability. One-way ANOVA and SNK- q test were used to compare the above radiographic parameters and age between CM, CMS and NC group. The distribution of genders was compared between the three groups using Chi-square tests. Pearson correlation analysis were conducted to demonstrate the relationship between radiographic parameters in CM and CMS group. Results:ICC ranged between 0.91 and 0.95 in the current study, demonstrating "excellent" reliability of radiographic measurements. No significant difference was noted regarding age and the distribution of genders among the three groups. Patients in CM and CMS groups showed similar DSCO-C 2 values ( P=0.254), both of which were significantly lower than that in NC group ( P<0.001). DSCA-C 2 in CMS group was significantly larger than that in CM ( P=0.003) and NC ( P<0.001) groups, while no significant difference was found between the CM and NC groups ( P=0.216). Moreover, DPJ in CMS group was significantly lower than that in CM group ( P<0.001) and NC group ( P<0.001). There was no significant difference in AB between CM and CMS groups ( P=0.948). DSCO-C 2 was significantly positively correlated with DSCA-C 2 in CMS group ( r=0.906, P<0.001), while AB, D-syrinx, DSCO-syrinx, DSCA-syrinx and DPJ were not significantly correlated with DSCA-C 2. There were significant correlations observed between DPJ and other radiographic parameters in the CMS group (all P>0.05). Significant positive correlation between DSCO-C 2 and DPJ was observed in CM group ( r=0.703, P=0.005). There was no significant correlation between DSCO-C 2 and DSCA-C 2 and DPJ in NC group (all P>0.05). Conclusion:CMI adolescents have significant atrophic change of cervical spinal cord and midbrain-pontine junction compared with healthy adolescents, regardless of the existence of syrinx. Moreover, syrinx in CMI patients indicated more obvious atrophic change of midbrain-pontine junction and dilated spinal canal compared with isolated CMI patients.

The research on brain functional mechanism and cognitive status based on brain network has the vital significance. According to a time-frequency method, partial directed coherence (PDC), for measuring directional interactions over time and frequency from scalp-recorded electroencephalogram (EEG) signals, this paper proposed dynamic PDC (dPDC) method to model the brain network for motor imagery. The parameters attributes (out-degree, in-degree, clustering coefficient and eccentricity) of effective network for 9 subjects were calculated based on dataset from BCI competitions IV in 2008, and then the interaction between different locations for the network character and significance of motor imagery was analyzed. The clustering coefficients for both groups were higher than those of the random network and the path length was close to that of random network. These experimental results show that the effective network has a small world property. The analysis of the network parameter attributes for the left and right hands verified that there was a significant difference on ROI2 ( = 0.007) and ROI3 ( = 0.002) regions for out-degree. The information flows of effective network based dPDC algorithm among different brain regions illustrated the active regions for motor imagery mainly located in fronto-central regions (ROI2 and ROI3) and parieto-occipital regions (ROI5 and ROI6). Therefore, the effective network based dPDC algorithm can be effective to reflect the change of imagery motor, and can be used as a practical index to research neural mechanisms.

Objective: To investigate the clinical value of the serum new molecular markers, soluble triggering receptor expressed on myeloid cells-1(sTREM-1)and soluble hemoglobin scavenger receptor(sCD163), in the diagnosis of sepsis in elderly patients with burns. Methods: A total of 58 inpatients with burns from Jun 2017 to June 2018 were enrolled in the study.Patients were divided into three groups: the sepsis group(n=12), the localized infection group(n=21)and the non-infection group(n=29). The levels of sTREM-1 and sCD163 were determined by enzyme-linked immunosorbent assays(ELISAs). The clinical diagnostic value of sTREM-1 and sCD163 was assessed by receiver operating characteristic(ROC)curve analysis. Results: There was a statistically significant difference in the levels of sTREM-1 and sCD163 at day 1 between the three groups(F=20.994 and 38.363, P<0.01). Serum levels of sTREM-1 and sCD163 were higher in the sepsis group than in the localized infection group and the non-infection group.Serum levels of sTREM-1 and sCD163 were higher in the localized infection group than in the non-infection group.Serum levels of sTREM-1 and sCD163 were lower at day 7 than those at day 1 in all groups(F=21.242 and 41.035, P<0.01). Serum sTREM-1 levels were positively correlated with serum sCD163 levels(r=0.609, P=0.000). The AUC of sTREM-1 and sCD163 for the diagnosis of sepsis was 0.880(95%CI: 0.816~0.926). Conclusions Serum levels of sTREM-1 and sCD163 are elevated with increasing degrees of infection.Monitoring serum sTREM-1 and sCD163 levels is helpful for the diagnosis of sepsis in elderly patients with burns.

Objective: The aim was to investigate the genotype distribution of two major epitopes of large surface protein (PreS1) of hepatitis B in Chinese patients and to explore the association between the genotypes of these two epitopes, and to determine whether PreS1 full-length genotype could be revealed according to the polypeptide sequence of key epitopes. Methods: HBV DNA was extracted from the serum of patients for PCR amplification. 278 samples amplified successfully were sequenced and compared with the known HBV sequences in Genbank to determine the two key epitopes of HBV PreS1 genotype (amino acid epitope 21-47 and 94-117, abbreviated as P21 and P94) and PreS1 full-length genotypes. The correlation among three genotyping approaches was analyzed by Cohen’s kappa coefficient to verify the consistency between the key-epitope genotyping and the full-length preS1 genotyping. Results: 232 samples were successfully sequenced. The genotyping based on the kind of P21 epitope protein sequence, 201 cases for genotype C, 23 cases for genotype B and 8 cases for uncertain genotypes and genotyping based on the form of P94 epitope protein sequence, 199 cases for genotype C, 25 cases for genotype B and 8 cases for indeterminate genotypes. Lastly, the genotyping based on sequence of the full-length PreS1 sequence, 207 and 25 cases for genotype C and B. P21 or P94 epitope genotyping and PreS1 full length genotyping were highly consistent, respectively, 96.55% and 96.12%, and the two epitopes (P21and P94) genotyping have parallel consistency (93.10%). Conclusion In this study, an innovatively genotyping method based on the amino acid sequence of key epitopes was proposed. The genotypes of HBV in china were mainly B and C genotypes, and the genotypes of key conserved epitopes of HBV PreS1 were highly consistent with the full-length genotyping ( > 96%). Moreover, genotyping with one or two key epitopes can be used in place of the full-length genotyping.

To investigate the therapeutic effect of peroxiredoxin-6(PRDX6)on ultraviolet-induced corneal injury in rats and explore the mechanism.The rat model of corneal injury was established by exposing to ultravio-let.Male wister rats were randomly divided into control groups,dexamethasone (DXM)groups and PRDX6 groups,the rats were administered four times a day and for 12 days.The corneal opacity was observed with a slit-lamp microscope.Histopathologic changes were observed with light microscopy.The content of corneal malonalde-hyde(MDA)was determined by thiobarbituric acid test and the total antioxidative capacity(TAOC)was detected by chemical colorimetric test.P38 MAPK signal pathway was detected with the method of Western blot and the gene expression of cytokines were measured by RT-PCR method.Compared with the control group,PRDX6 treat-ment significantly reduced corneal opacity,improved corneal pathology injury,decreased the MDA content and in-creased the TAOC.In the PRDX6 group the level of phosphorylated p38 protein was significantly lower than that in the control group.The gene expression of cytokine were different between control and PRDX6 groups(P <0.05).PRDX6 showed therapeutic effect in the rat model of ultraviolet-induced corneal injury.This maybe be concerned with that it could alleviated the oxidative damage,suppressed p38 MAPK phosphorylation and regulate the gene expression of cytokine.