The changes of immune function of red-cell C3b receptors in dog's blood exposured to 60Co Y-ray at various doses were observed by rosette rate of the red-cell C3b receptors to the sensitized yeast cells. Results showed that the function of the red-cell C3b receptors irradiated by 60Co Y-ray at doses of 1, 5 and 9 Gy was markedly lower than that of the control group, and that difference between all various dose groups is of tendency towards alinear relationship. It is possible that the C3b receptors are sensitive to radiation among elements of adult red-cells.

Sunscreen products have been widely used with the increase in public awareness of sun protection. As sunscreens are structurally stable and resistant to degradation, the concern for their biotoxicity and impact on marine environment has been heightened increasingly, and several countries and regions have successively issued bans on relevant sunscreen products. However, these bans have not yet affected the key international rules and regulations related to sunscreen products. The risks of different sunscreens to marine ecosystems and potential risks to human themselves still need to be evaluated through further multidisciplinary researches.

BACKGROUND: When central nervous system is injured, re-expression of nestin protein may enhance the anti-injury ability of cells and be advantageous to the repair of focus of injury.OBJECTIVE: To explore the reaction of nerve stem cell (NSC) in permanent brain ischemia through NSC migration and the change of nestin protein expression.DESIGN: A randomized and controlled verification research with experimental animals as subjects.SETTING: Anatomy teaching and research offices in a training school and a university.MATERIALS: The experiment was done in the Teaching and Research Office of Humane Anatomy in Medical College of Xi'an Jiaotong University from October 1999 to January 2001. Totally 75 healthy SD rats were selected and randomly divided into normal control group, experiment group and sham-operation group. Twenty-five animals were in each group. Heads of animals were cut and brain was got out at the 1st, 3rd, 7th, 14th and 28thdays after operation, 5 animals at each time.METHODS: The model was rats with permanent cerebral ischemia. Immunohistochemical dyeing methods were used to observe NSC migration,change of marker of NSC and nestin protein at the 1st, 3rd, 7th, 14th and 28th day after cerebral ischemia.MAIN OUTCOME MEASURES: ①Results of immunohostochemicaldyeing. ②Migration length of nestin+ cells in anterior subentricular zone (SZa) region of brain tissue at normal status and at different time points after cerebral ischemia. ③Number variation of nestin+ cells at different timepoits after ischemia near the ischemic region.RESULTS: Through nestin immunohistochemical dyeing, it was found that NSC in normal brain tissue mainly existed in subependymal zone (SEZ)region. NSC of SEZ migrated in the direction of ischemic region along ventri- corpus callosum after ischemia. Among them, it reached the farthest at the 7th day after ischemia. More nestin+ cells appeared near ischemic region at the 1st day, and then reduced little by little 3 days later.CONCLUSION: NSC has certain reactive ability to ischemic brain injury.Expression of nestin protein near ischemic region may be a kind of protection to injury.

Objective To improve the diagnostic level of the holoprosencephaly (HPE) disease in children by imaging analysis. Methods From May 2007 to August 2015, 14 cases of HPE in children were collected (7 males and 7 females, aged 2 days to 8 years, mean 14 months). Two cases were showed as sucking difficulty and convulsions frequently after birth. Mental and motor development defects were showed in 12 cases, in which 4 cases were associated with cleft lip and palate deformities and 1 case with microcephaly. Of the 14 cases, CT scan was performed in 7 cases and MRI scan in 7 cases. Results All 14 cases were consistent with the diagnostic criteria of HPE according to the imaging findings of literatures reviewed. Four cases were showed as semilobar HPE, 8 cases were lober HPE, and 2 cases were middle interhemispheric fusion variant. There were thirteen cases were associated with corpus callosum agenesis, including 2 cases were with heterotopic gray matter. Putamen and caudate partia fusion were showed in 6 cases, and thalamus partia fusion in 3 cases. One case was associated with schizencephaly, 4 cases were palate malformation, one case was microcephaly, and one case was cerebellar hypoplasia. Conclusion CT and MRI scan could contribute to diagnosis and classification of holoprosencephaly, and determine whether HPE was associated with other neurological abnormalities. MRI scan should be the first choice for HPE diagnosis.

BACKGROUND: Neuroscience and brain science researches have paid attention to the effect of astragalus membranaceus in the treatment of neurologic impairment disease and neural regeneration. Studying astragalus membranaceus effects on neural stem cells are becoming a new research direction. OBJECTIVE: To explore the effects of astragalus injection on biological viability of rat neural stem cells. METHODS: Neural stem cells of Wistar rats were separated and cultured. Immunofluorescence staining was applied to identify the neural stem cells. The purified cells were gained by the second subcultivation in vitro, and then the cells were randomly divided into control group and astragalus injection groups with various concentrations (50, 200, 400 g/L) to culture for 6, 12 and 24 hours. The activity of cells was tested by 3-(4,5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide assay, and then the immunohistochemistry was applied to detect the expressions of neuron-specific enolase and glial fibril ary acidic protein in the 50 g/L astragalus injection group after induced for 7 days. RESULTS AND CONCLUSION: The viability of neural stem cells increased significantly after intervention with different concentrations of astragalus injection for 6 hours as compared with the control group (P < 0.05). However, there was no difference in the cel viability after treated with different concentrations of astragalus injection for 24 hours (P > 0.05). Compared with the control group, the cells in the 50 g/L astragalus group differentiated rapidly, and the number of positive cells for neuron-specific enolase was increased significantly (P < 0.05). The neural stem cells proliferation was hastened, and its differentiation was promoted by the interference of astragalus injection.

ObjectiveTo investigate the influencing factors for persistent low-level viremia (LLV) in chronic hepatitis B(CHB) patients receiving long-term entecavir antiviral therapy. MethodsThe CHB patients who received entecavir antiviral therapy for at least one year in The Affiliated Hospital of Xuzhou Medical University from November 2018 to June 2020 were enrolled as subjects, and according to HBV DNA load at the end of the observation period, the patients were divided into LLV group and sustained virological response (SVR) group. Demographic features and laboratory markers were observed for all patients. The independent samples t-test or the Mann-Whitney U test was used for comparison of continuous data between two groups, and the chi-square test was used for comparison of categorical data between two groups. A multivariate logistic regression analysis was used to investigate the influencing factors for LLV in patients receiving long-term entecavir treatment. ResultsA total of 560 CHB patients were enrolled, with 204 in the LLV group and 356 in the SVR group. There were significant differences between the two groups in age (Z=-3.530, P＜0.001), sex (χ2=4.270, P=0.039), presence or absence of liver cirrhosis (χ2=53.879, P＜0.001), medication compliance (χ2=5.326, P=0.021), HBeAg positive rate (χ2=90.681, P＜0.001), baseline HBV DNA load before treatment (Z=-8.337, P＜0.001), baseline HBsAg quantification (Z=-10.472, P＜0.001), and medication type (χ2=7.558, P=0.006). The multivariate logistic regression analysis showed that baseline HBeAg status before treatment (odds ratio ［OR］=3.381, 95% confidence interval ［CI］: 1.985-5.756, P＜0.001), HBV DNA load before treatment (OR=1.223, 95%CI: 1.050-1.424, P=0.010), and HBsAg quantification before treatment (OR=2.448, 95%CI: 1.743-3.438, P＜0.001) were risk factors for LLV in long-term entecavir antiviral therapy. ConclusionIn clinical practice, CHB patients with high HBV DNA load, high HBsAg quantification, and positive HBeAg tend to have a high risk of LLV even after long-term entecavir antiviral therapy. Therefore, such population should be taken seriously with the dynamic monitoring of HBsAg quantification, HBV DNA load, and HBeAg status.

Objective: To investigate the preventive effects of gelatin sponge debris pre-filling on bone cement leakage during percutaneous kyphoplasty (PKP) for vertebral osteoporotic fracture with cortical bone rupture. Methods: The data of 256 cases (294 segments) of osteoporotic vertebral compression fracture (OVCF) treated with PKP from January 2014 to July 2016 were retrospectively analyzed. There were 106 segments in 92 males and 188 segments in 164 females. In 119 cases, a total of 132 segments were pre-filled with gelatin sponge debris before bone cement injection. The average age was 74.4±7.7 years. In 137 cases, 162 segments were not pre-filled with gelatin sponge debris, with average age of 73.3±6.4 years. The incidences of cement leakage, visual analogue scale (VAS), Oswestry disability index (ODI), the change of anterior vertebral height and kyphosis angle before and after operation were compared between the two groups. Results: In gelatin sponge group, the incidence of cement leakage was 12.6% (15/119), including 3.4% (4/119), 0.8% (1/119), 1.7% (2/119), 5.0% (6/119) and 1.7% (2/119) of the endplate type, the lateral type, the anterior type, the posterior type and the mixed type. The incidence of cement leakage in non-gelatin sponge group was 23.4% (32/137), including 4.4% (6/137), 5.1% (7/137), 5.1% (7/137), 5.8% (8/137) and 2.9% (4/137) of the endplate type, the lateral type, the anterior type, the posterior type and the mixed type. The difference of total cement leakage rate between the two groups was significant (χ²=4.912, P=0.027). There was no significant difference in leakage rates among different types (P>0.05). Postoperative symptoms were improved in both groups. VAS score and ODI index were improved at 1, 3 and 6 months after operation (P<0.05). However, there was no significant difference in VAS score and ODI index at preoperative and post-operative follow-up between groups. There were no significant difference between the two groups in the height of the anterior edge of the injured vertebra before operation (17.3±3.2 mm, 17.5±5.4 mm), the kyphosis angle before operation (18.9°±2.0°, 18.7°±2.3°), the height of the anterior edge of the injured vertebra after operation (22.7±3.6 mm, 22.4±5.4 mm), and the kyphosis angle after operation (11.2°±1.4°, 11.9°±1.8°). Conclusion Gelatin sponge debris pre-filling can effectively reduce bone cement leakage after PKP in patients with vertebral cortical bone rupture. There was no significant effect on the improvement of symptoms after PKP.

OBJECTIVETo evaluate the pancreatic fistula affected by different type of pancreaticojejunostomy after pancreaticoduodenectomy.

METHODSElectronic databases PubMed, EMBase, COCHRANE Library, Wanfang, and VIP etc were used to search for randomized controlled trials or non randomized prospective controlled trials reported before September 2013 on clinical effects of pancreaticojejunostomy after pancreaticoduodenectomy. The statistical analysis was done by Review Manager 5.0.

RESULTSA total of 8 trials were included in this meta-analysis. The effects of duct-to-mucosa pancreaticojejunostomy (dmPJ) and invaginating pancreaticojejunostomy (iPJ) on postoperative complication in five studies were compared, and no statistical significance were found in postoperative pancreatic fistula (POPF) (M-H:OR = 0.77, 95% CI:0.35-1.69, P = 0.52), reoperation (M-H:OR = 1.38, 95% CI:0.64-2.95, P = 0.41) and mortality (M-H:OR = 1.15, 95% CI:0.42-3.13, P = 0.79) between dmPJ and iPJ. The effects of binding pancreaticojejunostomy (bPJ) and conventional pancreaticojejunostomy (cPJ) (including duct-to-mucosa pancreaticojejunostomy and invaginating pancreaticojejunostomy) on postoperative complication were compared, and no statistical significance were found in postoperative pancreatic fistula (POPF) (M-H:OR = 0.57, 95% CI = 0.28-1.17, P = 0.13) , reoperation (M-H:OR = 1.18, 95% CI = 0.48-2.92, P = 0.72) and mortality (M-H:OR = 0.74, 95% CI = 0.27-1.99, P = 0.55) between bPJ and cPJ.

CONCLUSIONThere are no significant differences between dmPJ and iPJ in pancreatic fistula reoperation and mortality, and there are also no significant differences between bPJ and cPJ.

Anastomosis, Surgical ; adverse effects ; Humans ; Pancreas ; surgery ; Pancreatectomy ; adverse effects ; Pancreatic Fistula ; etiology ; surgery ; Pancreaticoduodenectomy ; adverse effects ; Pancreaticojejunostomy ; Postoperative Complications ; surgery ; Postoperative Period ; Prospective Studies ; Randomized Controlled Trials as Topic ; Reoperation

Objective To assess the brain development of newborns with cardiac septal defects by MRI.Methods The brain MR images of 150 newborns with cardiac septal defects and 50 normal newborns were analyzed retrospectively.We evaluated the brain development by measuring the four indices of lateral ventricle:anterior horn index (F/F'),body index (D/D'),caudate nucleus index (C/C')and Evans index.Independent samples t test was used to compare the differences between the two groups,and the possible positive diagnostic cut-off points were calculated by using the nonparametric ROC analysis.Results There were no significant differences between the congenital heart disease group and the control group in the two indices:F/F'[(0.301±0.035)vs (0.296±0.031);t=1.035,P>0.05]and Evans index [(0.239±0.052)vs (0.233±0.025);t=0.778,P>0.05].The values of D/D'[(0.261±0.039)vs (0.234±0.032);t=3.873,P<0.05)] and C/C'[(0.138±0.018)vs (0.124±0.015);t=4.479,P<0.05]were significantly higher in the congenital heart disease group than in the control group.In the congenial heart disease group,the area under the ROC curve obtained by D/D'and C/C'were 0.698 and 0.750,respectively.The maximum Yuedeng index corresponding to the D/D'value and the C/C'value were 0.28 and 0.12,respectively. Conclusion The body index(D/D')and the caudate nucleus index(C/C')are sensitive to evaluate the differences of the brain volume between the newborns with cardiac septal defects and the normal newborns.It is helpful to find the abnormal brain volume when the value of D/D'is greater than 0.28 and the value of C/C'is greater than 0.12.

Objective To investigate the influencing factors for recompensation in patients with first-time decompensated hepatitis B cirrhosis. Methods A total of 438 patients with first-time decompensated hepatitis B cirrhosis who attended The Affiliated Hospital of Xuzhou Medical University from September 1, 2011 to December 31, 2019 were enrolled, and all patients received comprehensive treatment including antiviral therapy. According to the outcome at the end of follow-up, the patients were divided into recompensation group and persistent decompensation group, and the independent influencing factors for recompensation were analyzed. Long-term survival rate was compared between the patients with different states of compensation. The Mann-Whitney U test was used for comparison of continuous data between two groups, and the chi-square test was used for comparison of categorical data. A multivariate Cox proportional-hazards regression model analysis was used to investigate the influencing factors for recompensation. The Kaplan-Meier method was used to plot survival curves, and the log-rank test was used for comparison. Results Among the 438 patients with decompensated hepatitis B cirrhosis, 199 (45.4%) achieved recompensation after antiviral therapy. There were significant differences between the recompensation group and the persistent decompensation group in sustained virologic response (SVR) ( χ 2 =72.093, P < 0.001), single or multiple complications ( χ 2 =9.834, P =0.002), presence or absence of gastrointestinal bleeding ( χ 2 =6.346, P =0.012), serum creatinine (SCr) ( Z =-1.035, P =0.011), blood sodium concentration ( Z =-1.606, P =0.019), hemoglobin ( Z =1.455, P =0.006), and alanine aminotransferase (ALT) level ( Z =-2.194, P < 0.001). Baseline ALT level (odds ratio [ OR ]=1.002, 95% confidence interval [ CI ]: 1.000-1.003, P =0.009), SVR ( OR =5.760, 95% CI : 3.634-9.129, P < 0.001), and SCr ( OR =0.990, 95% CI : 0.981-1.000, P =0.047) were independent influencing factors for recompensation. The recompensation group had a significantly higher 5-year survival rate than the persistent decompensation group (87.9% vs 72.0%, χ 2 =9.886, P =0.025). Conclusion After comprehensive treatment, including antiviral therapy, approximately 45.4% of patients can achieve recompensation.Patients with elevated baseline ALT and achieved SVR were more likely to achieve recompensation, patients with elevated baseline serum creatinine had difficulty achieving recompensation, and patients with recompensation had a better long-term prognosis than patients with persistent decompensation.