Expression and Correlation Analysis of Serum miR-497-5p and FGF-2 in Patients with Alzheimer's Disease / 医学研究杂志

Objective To investigate the expression level,diagnostic value and correlation of miR-497-5p and human fibroblast growth factor-2(FGF-2)in patients with Alzheimer's disease(AD).Methods The clinical data of 50 patients with first diagnosed AD and 37 normal subjects(control group)were collected,among which AD patients were divided into mild AD group(n=18),moder-ate AD group(n=18)and severe AD group(n=14).The expression level of miR-497-5p was detected by real-time quantitative polymerase chain reaction(RT-qPCR)and FGF-2 was detected by enzyme-linked immunosorbent assay(ELISA).Mini-mental state examination(MMSE)was used to evaluate the cognitive function of AD patients,and the correlation between miR-497-5p and MMSE and FGF-2 levels was analyzed.The diagnostic efficacy of miR-497-5p and FGF-2 levels for AD was evaluated using receiv-er operator characteristic(ROC)curve.Results Compared with the control group and mild AD group,the expression levels of miR-497-5p in moderate and severe AD groups were significantly increased(P＜0.01),and the level of FGF-2 was significantly decreased(P＜0.01).MiR-497-5p in AD group was negatively correlated with MMSE score and FGF-2 level(r were-0.724 and-0.748,P＜0.01).ROC curve analysis results showed that miR-497-5p,FGF-2 and their combined indexes had higher area under the curve,sensitivity and specificity in the diagnosis of moderate and severe AD and in the differentiation of mild and moderate AD,as well as mild and severe AD,and the combined indexes of miR-497-5p and FGF-2had the best diagnostic and differential efficacy.Conclusion Serum miR-497-5p is up-regulated and FGF-2 level is down-regulated in patients with moderate and severe AD.The combined detection of miR-497-5P and FGF-2has certain diagnostic value for moderate and severe AD and provides certain reference.

Effects of Xiangshao granules on behavior and OPCs and OLs in the medial prefrontal cortex of mice with post-stroke depression / 中华神经医学杂志

Objective:To investigate the effects of Xiangshao granules on behavior and oligodendrocyte precursor cells (OPCs) and oligodendrocytes (OLs) in the medial prefrontal cortex (mPFC) of post-stroke depression (PSD) mice.Methods:Eighty C57BL/6 mice were divided into sham-operated group, middle cerebral artery occlusion (MCAO) group, PSD+PBS group, and PSD+Xiangshao group ( n=20). PSD models were constructed using mild chronic unforeseeable stress (CUMS) and solitary feeding after MCAO. MCAO models were evaluated by laser speckle contrast imaging (LSCI), modified neurological severity score (mNSS) and TTC staining. PSD models were evaluated by body mass, sugar and water preference test and tail suspension test. After PSD modeling, mice in the sham-operated group, MCAO group, and PSD+PBS group were given 0.2 mL PBS, while mice in the PSD+Xiangshao group was given Xiangshao granules at dosage of 60 mg/kg (dissolved in 0.2 mL PBS); all were given via intragastric administration once a d for 28 d. Number of OPCs and OLs in mPFC was detected by immunofluorescence. Expressions of myelin basic protein (MBP) and phosphatidylinositol 3-kinase/serine/threonine kinase/mammalian target of rapamycin (PI3K/AKT/mTOR) pathway proteins in mPFC were detected by Western blotting. Results:(1) Model verification results: LSCI showed obvious changes of cerebral blood flow in the middle cerebral artery supply area before, during and after MCAO; TTC staining showed typical red non-infarct area and white infarct area in MCAO group, PSD+PBS group and PSD+ Xiangshao group; mNSS scores in MCAO group, PSD+PBS group and PSD+ Xiangshao group were all >4, without significant differences ( P>0.05); the MCAO model was successfully constructed. After PSD and before treatment, the PSD+PBS group and PSD+Xiangshao group had significantly decreased body weight and sugar-water preference, and statistically prolonged tail suspension immobilization time compared with sham-operated group and MCAO group ( P<0.05); the PSD model was successfully constructed. (2) Results of mouse behavior experiment after treatment: significant differences in body weight, sugar-water preference and tail suspension time were noted in mice of the 4 groups 28 d after treatment ( P<0.05); PSD+Xiangshao group had significantly increased body weight and sugar-water preference and decreased tail suspension immobilization time compared with PSD+PBS group ( P<0.05). (3) Number of OPCs (Olig2 +PDGFRa +), proliferative OPCs (Ki-67 +PDGFRa +, EdU +PDGFRa +) and OLs (Olig2 +CC1 +), and relative MBP, p-PI3K, p-AKT and p-mTOR protein expressions in mPFC of the 4 groups were significantly different ( P<0.05); compared with those in PSD+PBS group, the above cell number and relative protein expressions in PSD+Xiangshao group were significantly increased ( P<0.05). Conclusion:Xiangshao granules can promote the OPCs proliferation and OLs maturation by activating PI3K/AKT/mTOR signaling pathway in mPFC, thus playing a role in PSD.

Compound from Magnolia officinalis Ameliorates White Matter Injury by Promoting Oligodendrocyte Maturation in Chronic Cerebral Ischemia Models / 神经科学通报·英文版

Chronic cerebral hypoperfusion leads to white matter injury (WMI), which subsequently causes neurodegeneration and even cognitive impairment. However, due to the lack of treatment specifically for WMI, novel recognized and effective therapeutic strategies are urgently needed. In this study, we found that honokiol and magnolol, two compounds derived from Magnolia officinalis, significantly facilitated the differentiation of primary oligodendrocyte precursor cells (OPCs) into mature oligodendrocytes, with a more prominent effect of the former compound. Moreover, our results demonstrated that honokiol treatment improved myelin injury, induced mature oligodendrocyte protein expression, attenuated cognitive decline, promoted oligodendrocyte regeneration, and inhibited astrocytic activation in the bilateral carotid artery stenosis model. Mechanistically, honokiol increased the phosphorylation of serine/threonine kinase (Akt) and mammalian target of rapamycin (mTOR) by activating cannabinoid receptor 1 during OPC differentiation. Collectively, our study indicates that honokiol might serve as a potential treatment for WMI in chronic cerebral ischemia.

Assessment of the safety and efficacy of combination chemotherapy and PD-1/PD-L1 inhibitor treatment of breast cancer: A meta-analysis / 中华医学杂志(英文版)

BACKGROUND@#As the efficacy of programmed cell death-1/programmed death-ligand 1 (PD-1/PD-L1) inhibitors combined with chemotherapy in curing breast cancer is still controversial, this meta-analysis compares the efficacy and safety of PD-1/PD-L1 inhibitors combined with chemotherapy and chemotherapy alone in the treatment of breast cancer, which provides guidance for the clinical treatment.@*METHODS@#Relevant studies published as of April 2022 in the various databases including EMBASE, PubMed, and Cochrane Library were selected. Randomized controlled trials (RCTs) in which control patients underwent chemotherapy alone and experimental group patients underwent combination chemotherapy and PD-1/PD-L1 inhibitor treatment were included in this investigation. Investigations without complete information, researches from which information could not be extracted, duplicate articles, animal studies, review articles, and systematic reviews were excluded. STATA 15.1 was employed for all statistical analyses.@*RESULTS@#In total, eight eligible studies were identified, revealing that combination chemotherapy and PD-1/PD-L1 inhibitor treatment was linked to significant increases in progression-free survival (PFS) relative to chemotherapy alone (hazard ratio [HR] = 0.83, 95% confidence interval [CI]: 0.70-0.99, P = 0.032) but not overall survival (HR = 0.92, 95% CI: 0.80-1.06, P = 0.273). Pooled adverse event rates were also increased within the group of combination treatment relative to the chemotherapy group (risk ratio [RR] = 1.08, 95% CI: 1.03-1.14, P = 0.002). Specifically, nausea rates were lesser within the group of combination treatment relative to the group of chemotherapy (RR = 0.48, 95% CI: 0.25-0.92, P = 0.026). Subgroup analyses indicated that the PFS of patients who underwent combination atezolizumab or pembrolizumab and chemotherapy treatment were substantially longer than those of patients who underwent chemotherapy alone (HR = 0.79, 95% CI: 0.69-0.89, P ≤0.001; HR = 0.79, 95% CI: 0.67-0.92, P = 0.002).@*CONCLUSIONS@#The pooled results suggest that combination chemotherapy and PD-1/PD-L1 inhibitor treatment approaches help prolong PFS in breast cancer patients, but have no statistically significant effect on overall survival (OS). Additionally, combination therapy can significantly improve complete response rate (CRR) compared with chemotherapy alone. However, combination therapy was associated with greater rates of adverse events.

Effects of edaravone dexborneol combined with argatroban on neurological function,hemorheology and hemodynamics of patients with acute cerebral infarction of posterior circulation / 临床神经病学杂志

Objective To investigate the effects of edaravone dextran combined with argatroban on neurological function,blood rheology and posterior circulation hemodynamics in patients with acute cerebral infarction in the posterior circulation.Methods One hundred and fifty-six patients with acute cerebral infarction in the posterior circulation were collected and randomly divided into the conventional treatment group,edaravone dextranol treatment group(EDD treatment group)and edaravone dextranol combined with argatroban treatment group(combined treatment group),with 52 cases in each group.The general data of patients in the three groups were collected,and the changes of NIHSS score and Barthel index,blood rheology and posterior circulation hemodynamics were evaluated before and after treatment in the three groups.Results After treatment,NIHSS scores and Barthel index were significantly lower in all three groups than before treatment(all P＜0.01).The NIHSS score and Barthel index of the combined treatment group were significantly lower than those of the EDD treatment group and the conventional treatment group after treatment(all P＜0.05).The difference in total effective rate among the three groups was statistically significant(P＜0.05),and the total effective rate among in combined treatment group was significantly better than those in the EDD treatment group and the conventional treatment group(all P＜0.05).The platelet aggregation rate,erythrocyte pressure volume,whole blood specific viscosity and plasma specific viscosity in the three groups after treatment were significantly lower than those before treatment(all P＜0.01).After treatment,the platelet aggregation rate,erythrocyte pressure volume,whole blood specific viscosity and plasma specific viscosity of combined treatment group were lower than those of EDD treatment group and conventional treatment group(all P＜0.05).Peak systolic blood flow velocity(Vs)of basilar artery,vertebral artery and posterior cerebral artery in the three groups after treatment were significantly higher than those before treatment(all P＜0.01),and resistance index(RI)was significantly lower than that before treatment(all P＜0.01).The Vs of basilar,vertebral and posterior cerebral arteries in the combined treatment group were significantly higher than those in the conventional treatment group and the EDD treatment group(all P＜0.05),and the RI was significantly lower than that in the EDD treatment group and the conventional treatment group(all P＜0.05).There was no significant difference in the comparison of adverse reactions among the three groups(all P＞0.05).Conclusion Edaravone dextranol combined with argatroban can exert a good protective effect on neurological function in patients with acute cerebral infarction in the posterior circulation by improving blood rheology and posterior circulation hemodynamics.

Comparison of P300 and serum FGF22 levels between cognitive impairment patients with first-episode and recurrent depression and their relations with cognitive function and serum inflammatory factors / 中华神经医学杂志

Objective:To compare the differences of event-related potential P300 and serum fibroblast growth factor 22 (FGF22) levels in cognitive impairment patients with first-episode and recurrent depression, and analyze the relations of each index with cognitive function and serum inflammatory factors.Methods:From June 2020 to April 2021, 45 cognitive impairment patients with first-episode depression (first-episode group) and 42 cognitive impairment patients with recurrent depression (recurrence group) were selected from our hospital. P300 examination was performed and serum FGF22, interleukin 6 (IL-6) and tumor necrosis factor α (TNF-α) levels were measured by enzyme-linked immunosorbent experiment (ELISA). The differences in clinical data, P300 examination results, and serum FGF22, IL-6 and TNF-α levels were compared between the two groups. The correlations of P300 amplitude and latency and serum FGF22 level with Montreal Cognitive Assessment (MoCA) scores and IL-6 and TNF-α levels were analyzed.Results:As compared with the first-episode group, the recurrence group had significantly decreased MoCA scores, P300 amplitude and serum FGF22 level, and statistically increased P300 latency and IL-6 and TNF-α levels ( P<0.05). Correlation analysis showed that P300 amplitude and serum FGF22 level were positively correlated with MoCA scores, and negatively correlated with IL-6 and TNF-α levels ( P<0.05); P300 latency was negatively correlated with MoCA scores, and positively correlated with IL-6 and TNF-α levels ( P<0.05). Conclusion:P300 amplitude and latency and serum FGF22 level are different between cognitive impairment patients with first-episode and recurrent depression, and they are correlated with the cognitive function and serum inflammatory factors.

Predictive values of serum fibroblast growth factor 22 levels and electrical P300 in occurrence of mild cognitive impairment in patients with depression / 中华神经医学杂志

Objective:To investigate the predictive values of serum fibroblast growth factor 22 (FGF22) levels and electrical P300 in depression patients occurred mild cognitive impairment (MCI).Methods:A prospective study was performed. A total of 94 depression patients without cognitive impairment admitted to our hospital from January 2020 to August 2021 were chosen. These patients were followed up for one year; Hamilton Depression Scale (HAMD)-24 items and Montreal Cognitive Assessment Scale (MoCA) were used to evaluate the neuropsychological function of the patients every 3 months; according to the occurrence of MCI, the patients were divided into depression with MCI group ( n=57), and depression without MCI group ( n=32). All patients underwent baseline P300 examination and baseline serum FGF22 levels were detected by enzyme-linked immunosorbent assay (ELISA), and the differences in clinical data, P300 examination results and serum FGF22 levels were compared between the two groups. Correlation analysis was performed to analyze the correlations of P300 latency and serum FGF22 level with MoCA scores. Multivariate Logistic regression analysis was used to screen the independent influence factors for MCI in patients with depression. The predictive value of P300 latency and serum FGF22 level in MCI in patients with depression was analyzed by receiver operating characteristic (ROC) curve. Results:As compared with the depression without MCI group, patients in the depression with MCI group had significantly lower years of education and serum FGF22 level, and significantly higher proportion of patients living alone, and statistically higher P300 latency ( P<0.05). The results of correlation analysis showed that the MoCA scores at MCI period were positively correlated with serum FGF22 level ( r=0.665, P<0.001) and negatively correlated with P300 latency ( r=-0.621, P<0.001) in patients from the depression with MCI group. Multivariate Logistic regression analysis showed that serum FGF22 level was a protective factor for MCI in patients with depression ( OR=0.805, 95%CI: 0.737-0.862, P=0.003), and P300 latency was a risk factor for MCI in patients with depression ( OR=1.136, 95%CI: 1.115-1.163, P=0.001). ROC curve analysis showed that the areas under the curve (AUC) of serum FGF22 level, P300 latency, serum FGF22 level combined with P300 latency in predicting MCI in depression patients were 0.779, 0.724, and 0.852, respectively. Conclusion:The abnormal serum FGF22 level and P300 latency are closely related to the occurrence of MCI in patients with depression, and the combination of the two can be used to predict the occurrence of MCI in patients with depression.

Value of dilated Virchow-Robin spaces in the basal ganglia in predicting basal ganglia atrophy / 中华神经医学杂志

Objective:To explore the value of dilated Virchow-Robin spaces (dVRS) in the basal ganglia in predicting basal ganglia atrophy.Methods:A total of 120 patients accepted head MRI and conformed as having dVRS in the basal ganglia in our hospital from May 1, 2015 to April 30, 2016 were chosen in our study; these patients were followed up for 5 years. The basal ganglia volume was observed by 3.0T MRI; according to whether the basal ganglia had atrophy or not, these patients were divided into normal group ( n=82) and atrophy group ( n=38). The general data and dVRS grading between the normal group and the atrophy group were compared. The basal ganglia volume at baseline and 5 years later in patients with different dVRS grading and the difference value of basal ganglia volume at baseline and 5 years later (△basal ganglia volume) were recorded for comparative analysis. Spearman analysis was used to evaluate the correlation between △ basal ganglia volume and dVRS grading. Independent influencing factors for basal ganglia atrophy were analyzed by Logistics regression; receiver operating characteristic (ROC) curve was drawn to evaluate the predictive values of independent influencing factors and their combination in basal ganglia atrophy. Results:Patients in the atrophy group had significantly older age, significantly higher percentage of patients with diabetes history, and significantly higher dVRS grading in the basal ganglia than those in the normal group ( P<0.05). There were significant differences in basal ganglia volume and △ basal ganglia volume at baseline and 5 years later among patients with different dVRS grading ( P<0.05); △ basal ganglia volume gradually increased with the increase of dVRS grading. Correlation analysis showed that △ basal ganglia volume was positively correlated with dVRS grading in basal ganglia ( r s=0.695, P<0.001); after adjusting for age and history of diabetes, the correlation was still positive ( r s=0.667, P<0.001). Logistics regression showed that age ( OR=1.776, 95%CI: 1.372-2.141, P=0.008), diabetes history ( OR=1.513, 95%CI: 1.129-1.954, P=0.011) and dVRS grading in the basal ganglia ( OR=2.855, 95%CI: 2.367-3.283, P=0.006) were independent influencing factors for basal ganglia atrophy. The area under the ROC curve of dVRS grading for predicting the basal ganglia atrophy was 0.709 ( 95%CI: 0.611-0.792, P<0.001), with sensitivity of 61.89% and specificity of 83.59%; that of combined age, diabetes history and dVRS grading in the basal ganglia was 0.783 ( 95%CI: 0.687-0.878, P<0.001), with sensitivity of 73.68% and specificity of 85.19%. Conclusion:The dVRS in the basal ganglia has certain predictive value in basal ganglia atrophy after 5 years.

Microimaging evidences of hippocampal injury in radiotherapy avoiding hippocampus and its effects on cognition / 中华放射学杂志

Objective:To clarify the evidences of hippocampal injury after radiotherapy avoiding hippocampus and explore its relationships with cognition.Methods:A prospective design was adopted in this study.A total of 183 patients with nasopharyngeal carcinoma treated by intensity modulated radiation therapy (IMRT group) and 30 matched healthy control (HC group)were collected in the Affiliated Hospital of Jiangsu University and Southeast University Affiliated Zhongda Hospital from January 2017 to December 2019. All subjects were assessed by Montreal Cognitive Assessment (MoCA-B) at baseline and 6 months after radiotherapy, then the patients with nasopharyngeal carcinoma were divided into cognitive impairment group and non-cognitive impairment group. Subjects were scanned with Siemens 3.0 T MR, and T 1WI was used as analysis sequence.The individual standardized hippocampus ROIs were extracted based on Montreal Neurological Institute(MNI) brain template.All texture features were calculated using the Radiomics developed by C++and Delphi, and the intra group correlation coefficients (ICC), average direction, machine learning (random forest) and autocorrelation matrix were used for reducing the features dimension. One-way ANOVA and generalized linear models were used to compare the differences among different groups. Pearson correlations analyses were used to evaluate the relationships between important texture features and clinical data. Logistic regressions were used to calculate the abilities of texture features to predict cognitive impairment. Results:After 9 patients who lost follow-up were excluded, a total of 164 patients with nasopharyngeal carcinoma were included as IMRT group.Texture features of ROIs were extracted and dimensionally reduced successfully. Five differences features (Variance, Entropy, GlevNonU, RLNonUni and Contrast)were found among HC group, cognitive impairment group and non-cognitive impairment group, and the last three further showed significant differences within IMRT group (GlevNonU, P=0.011;RLNonUni, P<0.001;Contrast, P<0.001). Hippocampal doses were positively correlated with Variance ( r=0.448, P<0.05), and negatively correlated with Entropy ( r=-0.461, P<0.05). There was a positive correlation between MoCA-B scores with GlevNonU, RLNonUniand Contrast ( r=0.503, P<0.05; r=0.587, P<0.05; r=0.531, P<0.05). GlevNonU and Contrast were independent predictors of cognitive impairment in hippocampal avoidance of radiotherapy (OR=0.731, 95%CI 0.610-0.857; OR=0.651, 95%CI 0.496-0.853). Conclusion:Results of texture analysis could be used as micro imaging evidences of hippocampal injury in radiotherapy avoiding hippocampus, and could also effectively predict the occurrences of cognitive impairment.

The practical value of a Logistic regression model of serum indexes in differentiating between geriatric depression and depressive state / 中华老年医学杂志

Objective To investigate the practical value of a logistic regression model of serum indexes in distinguishing between geriatric depression and geriatric depressive state. Methods A total of 160 patients were recruited from the outpatient department from January 2013 to January 2016 ,and were divided into a depression group (n= 80)and a depressive state group (n= 80) ,with retrospective diagnoses based on the Chinese Classification of Mental Disorders-Third-Edition(CCMD-3).Serum samples were collected and enzyme linked immunosorbent assays (ELISA)were used to determine the concentrations of brain-derived neurotrophic factor (BDNF ) ,glial cell line-derived neurotrophic factor(GDNF) ,fibroblast growth factor 2(FGF-2) ,vascular endothelial growth factor (VEGF) ,interleukin-1β(IL-1β) ,interleukin-6 (IL-6) ,interleukin-10 (IL-10) ,tumor necrosis factor-α(TNF-α) ,cortisol (CORT ) ,and platelet-derived growth factor (PDGF).Binary logistic regression analysis was used to establish the regression model ,and the ROC curve was drawn to explore its value of differentiating geriatric depression from depressive state. Results The levels of serum BDNF , GDNF and VEGF in the depression group were lower than those in the depressive state group (BDNF :208.7 ± 41.4 vs.262.9 ± 84.6 ng/L ,GDNF :92.3 ± 18.6 vs. 101.4 ± 30.9 ng/L ,VEGF :223.1 ± 98.2 vs. 257.8 ± 77.2ng/L) ,while the levels of IL-1βand CORT in the depression group were higher than in the depressive group(IL-1β:27.0 ± 4.9 vs.19.6 ± 5.7 μg/L ,CORT :96.3 ± 16.7 vs.83.0 ± 17.3 nng/L).In multivariate logistic regression analysis ,BDNF(OR = 0.987 ,P = 0.001) ,IL-1β(OR =1.29 ,P = 0.000)and CORT (OR = 1.065 ,P = 0.000)were selected to build the regression model. The regression equation was P=1/[1+e-(- 8.546 - 0.013(BDNF)+ 0.258(IL -1β)+ 0.063(CORT)) ]and the area under the ROC curve was 0.966.Compared with retrospective diagnoses made two weeks later ,the correct diagnosis rate of the logistic model was 90.47％. Conclusions The Logistic regression model of serum indexes can further differentiate between geriatric depression and depressive state which also offers additional benefits for the diagnosis ,differential diagnosis ,and treatment of depression.

Determination of serum fibroblast growth factor-22 level in patients with first episode depression and its related research / 中华神经医学杂志

Objective To investigate the variation of serum fibroblast growth factor-22 (FGF-22) of first episode depressive patients before and after treatment,and its relations with serotonin (5-HT) and interleukin-1[β (IL-1β) levels and Hamilton's depression scale (HAMD) scores to provide assistance for further study of pathogenesis of depression.Methods Ninety patients with first episode depression accepted treatment in our hospital from June 2015 to June 2016 and 90 healthy controls were enrolled.The serum FGF-22 level was detected and Hamilton's depression scale (HAMD) was performed before and after drug treatment.The relations of FGF-22 level with 5-hydroxytryptamine (5-HT) and interleukin (IL)-1[β levels were analyzed.Results (1) Before treatment,the first episode depressive patients had significantly lower scrum FGF-22 level ([180.44±17.02] ng/mL) and statistically higher HAMD scores (17.84±5.92) as compared with the healthy controls ([200.74±16.63] ng/mL,1.88±2.67,P＜0.05).(2) The serum FGF-22 level after treatment ([195.74+19.57] ng/mL) was significantly higher than that before treatment,and the HAMD scores after treatment (7.64±4.09) were significantly lower than those before treatment (P＜0.05).(3) In the patient group,serum FGF-22 level and HAMD scores were negatively correlated (r=-0.644,P=0.000);serum FGF-22 level had positive correlation with 5-HT level (r=0.718,P=0.000),and negative correlation with IL-1β level (r=-0.763,P=0.000).Conclusion The serum FGF-22 level is abnormal in first episode depressive patients,and it could be a good indicator of peripheral blood in response to depression,which plays an important role in the pathogenesis of depression.

Fabrication of multifunctional bismuth-doped iron nanoparticle and its radiotherapy sensitization in glioblastoma / 中国组织工程研究

BACKGROUND:Bismth-doped iron nanoparticles modified by hyaluronic acid (HA-BiIOPs) not only act as an effective MRI contrast agent, but also as a radiotherapy sensitizer.OBJECTIVE:To fabricate the HA-BiIOPs and to observe its effect to enhance the radiosensitivity of glioblastoma cells U87MG under X-ray radiation.METHODS:HA-BiIOPs were synthesized using hydrothermal polyol method. (1) Cytotoxicity: A cytotoxicity test was carried out on U87MG cells and rat vascular smooth muscle cells (VSMCs). Cell proliferation rate of two kinds of cells cultured with different concentrations of HA-BiIOPs (0, 12.5, 25, 50, 100, 200, 400 mg/L) at 24 hours after culture were determined by cell counting kit-8 assay. (2) Histological analysis: ICR mice were sacrificed after intravenous injection of HA-BiIOPs, and pathological changes of mouse visceral organs were observed under an optical microscope. (3) Cellular uptake: The HA-BiIOPs after entered into the cytoplasm were observed by Prussian blue staining. (4) Radiosensitization test: U87MG cells at Logarithmic growth stage were cultured in culture medium as control group, subjected to X-ray irradiation (0, 3, 6, 9 Gy) as radiotherapy group, cultured in HA-BiIOPs (0, 12.5, 25, 50, 100, 200 and 400 mg/L) as HA-BiIOPs group or subjected to HA-BiIOPs culture plus X-ray irradiation as combined therapy group. Then, the cell proliferation rate and cloning efficiency were measured at 24 hours after treatment.RESULTS AND CONCLUSION:(1) The HA-BiIOPs at different concentrations were non-cytotoxic for VSMC and U87MG cells. (2) After intravenous injection of HA-BiIOPs, there was no obvious toxicity to the mouse susceptible organs. (3) After 6 hours of culture, the HA-BiIOPs could be internalized by U87MG cells. (4) The proliferation rate of U87 cells was negatively correlated with the concentration of HA-BiIOPs (0-200 mg/L) and X-ray dose (0-9 Gy). Especialy, the combination of 6 Gy X-ray irradiation with 200 mg/L HA-BiIOPs dramatically decreased the cell viability that was decreased to (41±7)%. In the combined therapy group with 6 Gy X-ray and 100 mg/L HA-BiIOPs, the cells proliferation rate was significantly lower than that in the control and radiotherapy groups (P < 0.05). These results indicate that HA-BiIOPs have a radiosensitizative effect on glioblastoma cells U87MG.

Study of the lateral ventricular in patients with Alzheimer's disease at 3.0T MR and MIMICS reconstruction / 实用放射学杂志

Objective To evaluate cerebral parenchymal atrophy of patients with Alzheimer's disease(AD)through the compara-tive analysis of the volume and morphology of the brain ventricle between patients with AD and normal elderly.Methods 20 patients with AD and 20 normal elderly people were scanned at 3.0T MR,and lateral ventricle section images were achieved,and the lateral ventricle volume and the anterior horn,posterior horn and temporal horn of the lateral ventricle were calculated by analyzing the re-construction of section images with MIMICS software from Belgian.Results As compared with normal elderly group,the patients with AD exhibited significantly increased the volume of left ventricular volume(LV),right ventricular volume (RV)and total vol-ume (TV)(P<0.05).Angle of bilateral anterior horn and temporal horn but not posterior horn of the lateral ventricle in patients with AD were significantly higher than that in normal elderly (P<0.05).The volume of the left,right and total cerebral ventricle, the angle of the anterior horn of the left and right lateral ventricle and the angle of the temporal horn of the left and right lateral ven-tricle were negatively correlated with MMSE (P<0.05).Conclusion Patients with AD exhibites significantly greater volume and an-gle of the lateral ventricular than normal elderly people.These related data measured can predict brain parenchymal atrophy of pa-tients with AD more conveniently and accurately.