Objective To investigate the imaging features of hippocampus and entorhinal cortex in the normal,mild cognitive impairment(MCI) and Alzheimer's disease (AD),and explore the value of diagnosing MCI and AD by using the method of MRI measuring the volume of hippocampus and entorhinal cortex.Method One hundred and twenty-two people including 42 cases of MCI,38 cases of AD,and 42 cases of noroal cognition(NC) were selected as our subjects from health examination persons both in hospital and outpatient service.All were performed general examination and neuropsychological scale evaluation.The volume of hippocampus and entorhinal cortex were measured by using MRI.The correlation between the volumetric changes of hippocampus and entorhinal cortex with scores of mini-mental state examination (MMSE) and Montreal Cognitive Assessment(MoCA) was analyzed.Results The volume of hippocampus and entorhinal cortex in the MCI group,AD group and NC group were (6.29 ± 1.13)cm3 and (2.71 ± 0.51) cm3,(6.27 ± 1.11) cm3 and (2.09 ±0.68) cm3,(7.01 ±0.92) cm3 and (3.12 ±0.34) cm3 respectively.The volume of MCI group was obviously smaller than that of NC group (P ＜ 0.05).The volume of AD group was smaller than that of NC group(P ＜0.01).The volume of AD group was obviously smaller than that of MCI group(P ＜0.01).There was positive correlation between hippocampus volume,the volume of entorhinal cortex and MMSE scores (r =0.770,0.811 ; P ＜ 0.01).Meanwhile,hippocampal volume,volume of entorhinal cortex were positive correlated with MoCA (r =0.810,0.842; P ＜ 0.01).Conclusion The atrophy of entorhinal cortex and hippocampus is closely related to cognitive disorder.The MRI measuring of the volume of entorhinal cortex and hippocampus has a potential value in diagnosing and distinguishing of MCI and NC.

Objective To evaluate the safety and efficacy of CT-guided radioactive 125I seed implantation in treating retroperitoneal lymph node metastasis due to recurrent cervical cancer after radiotherapy.Methods A total of 10 patients with retroperitoneal lymph node metastasis (12 lesions in total)due to recurrent cervical cancer after radiotherapy,who were treated with CT-guided 125I seed implantation during the periodfrom November 2011 to October 2015,were included in this study.The diameters,that were perpendicular to each other,of the involved lymph nodesranged from 1.7 cm×1 cm to 6.5 cm×5 cm,the diameter of 6 involved lymph nodes (50％) was ＜5.0 cm and the diameter of other 6 involved lymph nodes (50％) was ≥5.0 cm.With the help of treatment planning system for brachytherapy,the source distribution was formulated.Under CT guidance,the 125l seedswith the activity of 0.3-0.7 mCi were implanted.Postoperative validation showed that D90 (90％ minimum prescription dose received by the target volume) was 36-110 Gy (median 59 Gy).After the treatment,the changes in lesion size,pain relief and complications were recorded.Results The 10 patients were followed up for 4.3-16.1 months,the median follow-up time was 9.7 months.The 2-month local control rate and the 2-month effective rate were 100％ and 58.3％,respectively.The 2-month,6-month and 12-month survival rates were 100％,66.7％ and 58.3％,respectively.The median survival time was 12.1 months.One patient (10％) died of gastrointestinal bleeding at five months after treatment,six patients (60％) died of distant metastases,three patients (30％) survived withno evidence of local recurrence.No major complications such as massive hemorrhage,intestinal infection,bone marrow suppression or other 125I seed-related complications occurred.Conclusion For the treatment of retroperitoneal lymph node metastasis due to recurrent cervical cancer after radiotherapy,CT-guided radioactive 125I seed implantation has satisfactory short-term curative effect,and this technique is safe and feasible.

Objective To explore the clinical efficacy of CT-Guided radioactive 125I seed implantation in treating retroperitoneal lymph node metastases. Methods Eighteen patients with retroperitoneal lymph node metastases (20 lesions in total) received CT-guided radioactive 125I seed implantation. Treatment planning system (TPS) was used to formulate the therapeutic protocol. The radioactive activity of 125I particle ranged from 1.11 × 107-2.96 × 107 Bq (0.3-0.8 mCi) and the matched peripheral dose (MPD) was 60 -100 Gy. Postoperative dosimetry was routinely performed for all the patients in one week. Postoperative D90 (90%dose received by target volume) was 53 -107 Gy. The patient’s clinical benefit response (CBR), two-month local tumor control rate and one-year survival rate were evaluated, and the complications were recorded. Results All the patients were followed up for 2 -15 months with a median time of 5 months. The one-year survival rate was 22.2%. The clinical benefit rate, overall effective rate and two-month local tumor control rate were 72.2%, 70.0% and 90.0% respectively. No serious complications occurred in all patients. Conclusion For the treatment of retroperitoneal lymph node metastases, CT-guided radioactive 125I seed implantation is mini-invasive with satisfactory short-term effect and fewer complications. Therefore, this technique is a relatively safe therapeutic means.

Objective To discuss the necessity and feasibility of intraoperative use of treatment planning system (TPS) to make real-time planning for the treatment of retroperitoneal metastatic carcinoma with CT-guided 125I seed brachytherapy.Methods The clinical data of 20 patients with retroperitoneal lymph node metastases,who received CT-guided 125I seed brachytherapy during the period from January 2013 to December 2015,were retrospectively analyzed.The patients were divided into group A (n=10) and group B (n=10).The intraoperative TPS was employed to formulate the real-time planning for the patients of group A,while real-time planning was not adopted for the patients of group B.The quality verification of preoperative planning and postoperative effect was conducted for the patients of both groups.Comparing the preoperative and postoperative absorbed dose,the minimum absorbed dose (D90) error percentage of 90％ target volume,the error percentage of the covered volume by 90％ prescription dose to the target volume (V90),the error percentage of the covered volume by 100％ prescription dose to the target volume (V100),and the error percentage of the covered volume by 150％ prescription dose to the target volume (V150) were calculated in all patients of both groups,and the results were statistically analyzed.Results The mean error percentage of D90,V90,V100,V150 in group A were (-1.30±6.80) Gy,(-0.60±2.10)％,(-0.47±2.70)％ and (89.60±282.00)％ respectively,which in group B were (-9.33±46) Gy,(11.50±13.7)％,(-13.40±15.90)％ and (10.37±2.00)％ respectively.The differences in the error percentage of D90,V90 and V100 between group A and group B were statistically significant (P＜0.05 in all),while no statistically significant difference in the error percentage of V150 existed between group A and group B (P＞0.05).Conclusion The use of intraoperative TPS real-time planning can significantly improve the consistency of target region dose before and after seed implantation and make the dose distribution more reasonable,which is of great value for the standardization of CT-guided 125I seed brachytherapy of retroperitoneal lymph node metastases.

Objective To assess the protective effect of rabbit serum paraoxonase-1 (PON-1) on renal injury induced by dichlorvos in rats.Methods Totally 30 healthy S-D rats were randomly divided into 5 groups:control group (group A,n =6),exposure group (group B,n =6),PON-1 pretreatment group (group C,n =6),traditional atropine,pralidoxime treatment group (group D,n =6) and combination therapy group (group E,n =6).The rats of group A were given normal saline in equal volume of dichlorvos injected into abdominal cavity to make a false model of dichlorvos poisoning.In rats of groups B,C,D and E,9 mg/kg dichlorvos was administered.In rats of groups C and E,PON-1 4 500 units/kg was injected into vein of the tails half an hour before dichlorvos administration.After dichlorvos exposure,rats in group D and E were treated with 45 mg/kg iodoprofen and 10 mg/kg atropine by intraperitoneal injection.The activity of blood urea nitrogen (BUN) was assayed with urease.Serum creatinine (Cr) were measured by picric acid colorimetry.Serum Cys-C,KIM-1 and NAG in urine were determined by ELISA.Ultrastructural changes in renal tissues of rats were examined by light microscopy.The differences in laboratory findings between groups were compared.Results The creatinine level in group B was significantly higher than that in other groups (P ＜0.05).The levels of Cys-C,KIM-1 and NAG in group B and group D were significantly higher than those in group A (P ＜ 0.01).But there were no significant differences in above biomarkers among group C,group E and group A.There were no significant differences in above biomarkers between group B and group D.In group B,inflammatory cells infiltrated extensively in renal tissues and,the renal cells were congested and edematous,the lumen was obliterated and the border of the brush disappeared.The tubular structures were not clearly distinct found in group B,but edema and inflammatory cell infiltration with lesser degree were found in group D than those in dichlorvos exposure groups.The clearly distinct structure of the tube without completely occluded lumen in group D,and the most serious lesions were found in distal convoluted tubules.In group C,and group E,there were only mild congestion and edema without significant cell degeneration and necrosis.In group A,the structure of renal tubular epithelium was clearly distinct with brush-shaped margin,and without tubular or necrotic cell debris in the lumen.Conclusion The rabbit serum PON-1 can protect the renal tissue of rats after dichlorvos exposure.

Objective To explore whether the use of purified rabbit serum paraoxonase 1 (PON1) for the treatment of dichlorvos-induced liver injury in rats is superior to traditional method.Methods Thirty male SD rats were randomly divided into the followint 5 groups,with 6 rats in each group:control group (A group),dichlorvos group (B group),traditional treatment group (C group),PON 1 treatment group (D group),combined treatment group (E group).Rats in groups B,C,D and E were adminstered dichlorvos by intraperitoneal injection 9 mg/kg.In group C,atropine 10 mg/kg and iodine solution 45 mg/kg were injected intraperitoneally within 2 min after dichlorvos administration.In group D,PON1 was injected intravenously at a dose of 9 600 U/kg,30 min prior to poisoning.In group E,PON1 was injected intravenously at a dose of 9 600 U/kg,30 min prior to poisoning,followed by in travenous injection of atropine 10 mg/kg and iodine solution 45 rng/kg within 2 min after poisoning.Rats in A group received normal saline.Blood was collected at different time points to examine the acetyl cholinesterase (AChE)-levels by ELISA method.Liver tissue were collected at 12 hours after model establishment to observe the pathological changes.The expression of 4 hydroxy 2-nonenal (4-HNE) in the liver tissue was detected by immunohistochemistry and Western blotting.Results In group B,AChE levels decreased significantly,liver cells showed severn fatty degeneration,karyopyknosis and other pathological changes,and 4-HNE expression increased.The pathological changes of group D and group E were less obvious than those of group C,and the 4-HNE expression in the group D and group E were significantly different from that in the group C (P＜ 0.05).Conclusion PON1 plays a protective role in dichlorvos-induced liver injury in rats,and this protection is better than that offered by traditional treatment.

Objective: To investigate the effects of different expression of monoacylglycerol lipase (MAGL) in tumor-associated macrophages (TAMs) with the proliferation of MHCC97H human liver cancer cells in vivo and its mechanism. Methods: Human peripheral blood-derived monocyte was induced to differentiate into M2-type TAMs and was identified by flow cytometry. The co-culture model of TAMs and MHCC97H human liver cancer cells was established, and the expression of MAGL in TAMs cells was detected by qRT-PCR. The expression of MAGL in TAMs cells was detected by plasmid transfection. ELISA and qRT-PCR was used to detect the mRNA expression levels and secretion levels of inflammatory factors in TAMs cells. The subcutaneous tumor model of MHCC97H mice was constructed to observe the effect of different expression of MAGL in TAMs cells with the proliferation of MHCC97H human liver cancer cells in vivo. F-test was used for the measurement of homogeneity of variance between two independent samples. A t-test was used for homogeneity of variance, and the corrected t-test was used for non-homogeneity of variance. Results: Human peripheral blood-derived monocytes were successfully induced to differentiate into M2-type TAMs. An in vitro co-culture model was established. qRT-PCR showed that MHCC97H human liver cancer cells significantly down-regulated the expressional level of MAGL in TAMs cells. The constructed subcutaneous tumor model of mice demonstrated that up-regulation up-regulation of MAGL expression in M2-type TAMs inhibited the proliferation of MHCC97H human liver cancer cells in vivo. Furthermore, the mechanistic study illustrated that the high expression of MAGL promoted the transcription and secretion of inflammatory factors such as interleukin-1 beta, interleukin-6 and tumor necrosis factor-alpha in M2-type TAMs cells. Conclusion The overexpression of MAGL inhibits the proliferation of MHCC97H hepatocellular carcinoma cells in vivo, and its mechanism may be associated to the release of inflammatory factors that from TAMs cells.

Objective:To analyze the construction and operation of the 19th Hangzhou Asian Games designated hospitals, and to discuss the medical emergency security work of large-scale sports events, so as to provide references for the planning of designated hospitals in future large-scale sports events.Methods:Retrospective analysis was made on the establishment principles, requirements, selection of medical support personnel, and training exercises of the designated hospitals, focusing on the key links such as organizational system, staffing, designated areas, and drug management.Results:Total of 40 designated hospitals have successfully completed the task of medical security by rebuilding the medical security area of the Asian Games, elevating the process, equipping facilities, and strengthening staff training. During the Asian Games, 349 people were transferred to designated hospitals by ambulance, 54 people were hospitalized, 19 people underwent surgery, and 1022 people went to designated hospitals by themselves.Conclusion:The construction of the designated hospitals during the 19th Hangzhou Asian Games was of high quality, efficient and smooth operation. It is suggested that efforts should be made in the reconstruction of the medical security area for the Asian Games to be "relatively independent". The treatment process of self-visiting patients should be fully considered and the flat urgent emergency response mechanism needs to be established.

Objective:To evaluate the value of curative effect in neuromyelitis spectrum disease (NMOSD) based on circulatory function evaluation of intracerebral glymphatic system by using diffusion tensor imaging analysis along the perivascular space.Methods:The clinical and imaging data of 23 patients diagnosed with NMOSD at Tianjin Medical University General Hospital from March 2018 to December 2019 were retrospectively analyzed in this study. The clinical data included expanded disability status scale (EDSS), average relapse rate (ARR) and retinal nerve fiber layer (RNFL) thickness at baseline and 1 year follow-up after treatment. Among the 23 NMOSD patients, there were 22 females and 1 male, aged from 21 to 71 (45±13) years old. All the patients underwent MR scans at both baseline and 1 year after treatment, and the scanning sequences included cerebral 3D-T 1WI, T 2WI, diffusion tensor imaging and cervical spinal sagittal 3D-T 2WI, and the cervical spinal cord volume and bilateral diffusion tensor imaging analysis along the perivascular space index (ALPS index) were calculated. The partial correlation test was used to analyze the correlations between ALPS index and the clinical indicators such as EDSS, ARR, and bilateral RNFL, with the control variables as gender, age, years of education and course of disease. The multiple linear regression model was used to analyze the independent predictors for ALPS index and EDSS after treatment. Receiver operating characteristic curve (ROC) and area under the curve (AUC) were used to evaluate the diagnostic value of NMOSD treatment outcome by using ALPS index. Results:When controlling for gender, age, years of education and course of disease, there were significant negative correlations between right ALPS index and EDSS ( r=-0.50, P=0.048), bilateral average ALPS index and EDSS ( r=-0.53, P=0.034), left ALPS index and ARR ( r=-0.58, P=0.018), while there was significant positive correlations between right ALPS index and RNFL ( r=0.88, P=0.008) at 1 year follow-up after treatment. Multiple linear regression analysis showed that cervical spinal cord volume was an independent impact factor of bilateral average ALPS indexes (β=0.24, 95%CI 0.10-0.38, P=0.002), and bilateral average ALPS indexes (β=-3.22, 95%CI -5.97--0.48, P=0.024) and right RNFL (β=-0.05, 95%CI -0.08--0.02, P=0.002) at baseline were the independent impact factors of EDSS after treatment. ROC curve analysis showed that the bilateral average ALPS index at baseline had the best efficacy in predicting the curative effect of NMOSD patients with AUC=0.92. Conclusions:After treatment, NMOSD patients with severe clinical disability, high frequency of disease attack, poor visual performance, and severe cervical spinal cord atrophy have more serious impairment of intracerebral glymphatic system circulatory function. The ALPS index could help in predicting the clinical curative effect of NMOSD patients.