Action Potentials ; drug effects ; Animals ; Mice ; Mice, Inbred Strains ; Neurons ; drug effects ; physiology ; Plant Extracts ; pharmacology

In this paper, a segmentation method, supervised FCM, is used to segment multi-spectrum MR imaging. The qualitative evaluation of human brain can be provided by the results for diagnostics. It can improve the results using FCM.

ABSTRACT:Objective To investigate the effect and mechanism of anthocyanin on hepatic ischemia reperfusion injury in rats .Methods Totally 30 SD rats were randomly divided into sham group ,model group and anthocyanin group (n=10 in each) .Hepatic ischemia was constructed in model group and anthocyanin group by ligating left middle lobe of liver vascular branches for 90 min . Anthocyanin was administered at 90 min before ischemia by intraperitoneal injection at the concentration of 100 mg/kg for rats in anthocyanin group .Rats in model group and sham group were injected with the same dosage of normal saline at the same time .Serum and liver tissues were collected at 4 h after reperfusion by putting the rats to death .The expressions of ALT ,AST ,IL‐6 ,IL‐1βand TNF‐αin the serum were examined by ELISA .The pathological changes of liver tissue were evaluated by HE .The mRNA levels of IL‐6 ,IL‐1βand TNF‐αwere measured by RT‐PCR .The content of MDA was examined by TBA . The activities of CAT ,GPx and SOD were evaluated by xanthine oxidase method and the expression of p‐JAK2 ,p‐STAT3 ,JAK2 ,STAT3 and P53 were measured by Western blot .Results Compared with those in the sham group ,the activities of ALT and AST ,the expressions of p‐JAK2 ,p‐STAT3 ,P53 ,IL‐6 ,IL‐1β,TNF‐α and the content of MDA as well as the pathological changes of the liver in model group were significantly increased . However ,the activities of CAT ,GPx and SOD in model group were decreased and the expressions of JAK2 and STAT3 between the two groups did not differ .Compared with those in model group ,the activities of ALT and AST ,the expressions of p‐JAK2 ,p‐STAT3 ,P53 ,IL‐6 ,IL‐1β,TNF‐α,the content of MDA and the pathological changes of the liver in anthocyanin group were significantly decreased . But the activities of CAT , GPx and SOD in anthocyanin group were increased and the expressions of JAK 2 and STAT3 between the two groups did not differ , either .Conclusion Anthocyanin pretreatment can significantly decrease hepatic ischemia/reperfusion injury by suppressing oxidative stress and inflammation ,and the mechanism may be associated with reducing JAK2/STAT3/P53 signaling activation .

Objective To provide basis for the formulation of policies and measures that will reduce the work pressure on nurses and to provide them with a better working environment. Methods An investigation was made via questionnaires into 942 nurses working in designated SARS hospitals and a comprehensive analysis was conducted by means of multivariant stepwise regression. Results The major factors affecting the pressure on nurses include: lack of support from and communications with families, arduousness of tasks to an unbearable point, extreme strictness in management, and unsoundness of treatment and living conditions. Conclusion Good communications with families are of great significance to nurses working in isolated areas. It is imperative to rationally allocate the human resources of nurses, show more concern for them, encourage them to participate in management, and strengthen scientific prevention so as to create a better working environment.

Objective To explore the expression and significance of matrix metalloproteinase-2 (MMP-2) and basic fibroblast growth factor (bFGF) in human glioma.Methods The expression levels of bFGF and MMP-2 in 56 cases of human glioma and 9 cases of normal brain tissue specimen were detected by immunohistochemistry technique.Furthermore,the correlation between the expression of the bFGF and MMP-2 was compared.Results In normal brain tissue,grade Ⅰ,Ⅱ and grade Ⅲ,Ⅳ,the positive expression of bFGF were (9.51 + 2.69)％,(24.78 ±- 7.57 )％,(41.23 ± 12.35 )％,respectively,and MMP-2were (7.18 ± 2.12)％,(21.56 ± 3.85 )％,(54.32 + 7.32)％,respectively.The differences were significant among them (P ＜0.05).bFGF and MMP-2 were positive correlated (r ＝0.71,P ＜0.01).Conclusions There is an intrinsic correlation between the expression of the bFGF and MMP-2 and histological grade of human gliomas.These findings suggest that the synergistic interaction of bFGF and MMP-2 play an important role during the tumor invasion.

Objective To investigate the mechanisms of enophthalmos and deformities of orbital walls in patients with orbital blowout fracture and to evaluate the reconstructive surgical methods. Methods The features of orbital deformities, the change of orbital volume and the mechanisms of enophthalmos were measured and analyzed by means of 3-D CT technique and 3-D diagnostic computer-assisted system. The reconstructive operations were employed on these 11 cases with orbital blowout fractures to correct deformities and restore orbital volume by applying autogenous bone grafts or hydroxyapatite bone substitutes. Results There were no serious complications such as infection of bone graft, exposure of hydroxypatite implant in all 11 cases, 10 cases got satisfactory appearance of eyelids and orbit, of which thediplopia and enophthalmos were corrected with protrution of eyeball restoring normally. 1 case remained diplopia after surgical correction. Conclusions The enophthalmos is mainly caused by orbital volume enlarging and orbital content herniating into paranasal sinuses. Implanting autogenous grafts and hydroxyapatite substitutes to restore orbital volume are proved to be effective.

Abstract: Objective　In order to understand the radon exposure level of homes in Chongqing, this survey was carried out on the indoor radon concentration in 38 districts and counties of Chongqing. Methods　According to the population ratio of every 100 000 people, one monitoring site was arranged, and the number of parallel samples was 10% of the distribution sites. The monitoring sites covered 38 districts and counties in Chongqing. A total of 1 019 residential monitoring sites in 38 districts and counties in Chongqing were measured with radon accumulation detectors from July 2020 to June 2021. Results　The five districts/counties in Chongqing having the highest average concentration of residential radon in the year were Xiushan County 78.8 Bq/m3, Qianjiang District 78.0 Bq/m3, Yubei District 73.9 Bq/m3, Youyang County 71.4 Bq/m3 and Shapingba District 69.8 Bq/m3. The five districts/counties with the lowest mean concentration of indoor radon were 37.6 Bq/m3 in Zhongxian County, 36.4 Bq/m3 in Changshou District, 33.7 Bq/m3 in Kaizhou District, 33.2 Bq/m3 in Liangping District and 27.3 Bq/m3 in Wushan County. The concentration levels of radon in four seasons were 46.0 Bq/m3, 53.4 Bq/m3, 45.1 Bq/m3 and 59.5 Bq/m3, respectively. The concentration of radon was higher in Summer and Winter, and lower in Spring and Autumn, and the difference of concentration among four seasons was statistically significant (P<0.001). The radon concentration of newly built buildings after 2017 was relatively high, up to 61.8 Bq /m3, but there was no statistical significance in radon concentration in different building ages (P>0.05). The concentration of radon in rooms of buildings with less than 10 floors was higher, up to 63.2 Bq /m3, and there were significant differences in radon concentration among rooms of different floors (P<0.05). The average annual radon concentration in houses in Chongqing was about (51.6±19.5) Bq/m3, and the average annual effective dose of inhaling radon and its progeny by house-related people was about (1.38±0.52) mSv. Conclusion　The average annual radon concentration level of houses in Chongqing is within the standard limit value recommended by China, but the prevention and control of radon should be strengthened.

Objective To investigate the effect of neoadjuvent chomotherapy of paclitexel plus eisplatin for improving the surgical resection rate of stage ⅢA non-small cell lung cancer(NSCLC).Methods 46 patients with stage ⅢA NSCLC were randomly divided into neoadjuvant chemotherapy group(25 caeses) and simple operative group(25 cases).Neoedjuvant chemotherapy group(NCG) received two-cycle chemotherapy and then underwent operation.Simple operative group(SOG) was only treated by operation.Results The operative resection rate of NCG was 99.0%,radical resection rate was 64.0%.It was higher obviously than that simple operative group(SOG)(P

Objective To study the long-term results of 90 cases with inoperable stage Ⅲ non-small cell lung cancer.Methods All patients received CAP regimen or MVP regimen chemotherapy.80 patients received radiotherapy.Results The results showed that 1-,3-,5-year survival rates were 53.4%,19.5% and 8.5% respectively.The 3-,5-year survival rate for squamous cell carcinoma were higher than those adenocarcinoma(P

Objective To observe the effects of intensive insulin therapy on IL-10 level and NF-ΚB activity in peripheral blood mononuclear cells in patients undergoing cardiopulmonary bypass.Methods The non-diabetic patients undergoing cardiopulmonary bypass in our department were selected and assigned to intensive therapy group (group A,n=40) and received strict glycemic control after the initiation of surgery.And those who undergoing cardiac surgery but without strict glycemic control were assigned to routine therapy group (group B,n=40) as controls.The blood glucose in group A was maintained at 4.4～8.3mmol/L,whereas the glucose in group B was below 11.lmmol/L.The concentration of serum IL-10 and NF-ΚB activity in peripheral blood mononuclear cells was measured at different time points.Results There were no significant differences in general data between two groups.The concentration of IL-10 in group B was significantly lower than that in group A(P<0.05).compared with group B,strict glycemic control markedly suppressed NF-KB activation (P<0.05).Conclusion Intensive insulin therapy could reduce the activity of NF-ΚB and then reduce the expression of IL-10.Strict glycemic control could significantly mitigate the systemic inflammatory response.