Astrocytes are heavily activated in Alzheimer's disease,engulfing damaged synapses,Aβ proteins,Tau proteins,apoptotic cells and other substrates.However,these substrates are difficult to degrade,accumulate as the disease progresses,and impair the phagocytosis of astrocytes.During phagocytosis,astrocytes recognize different substrates through a variety of phagocytosis receptors and partially degrade the substrates through degrad-ing enzymes and lysosomal pathways.The accumulation of Aβ and Tau proteins in astrocytes caused astrocyte im-mune and metabolic disorders,and Aβ toxicity changed after phagocytosis.In addition,astrocytes and microglia form a complementary pattern and cooperate to complete phagocytosis through interaction.Regulating the pathway of astrocyte phagocytosis and degradation is believed to be a potential novo therapeutic for clinical treatment of Alzheimer's disease.

Objective:To discuss the synergistic inhibitory effect of apatinib mesylate(apatinib)combined with radiotherapy(RT)on the hepatocellular carcinoma(HepG2)cells in vitro,and to clarify its related antitumor mechanism.Methods:The HepG2 cells were cultured in vitro and treated with different concentrations of apatinib and/or varying doses of X-rays.MTT method was used to detect the survival rates of the cells in various groups;the inhibitory rates of cell proliferation and the 20％inhibitory concentration(IC20)of apatinib were calculated;the X-ray irradiation dose for subsequent experiments was detected.The HepG2 cells were divided into apatinib group,RT group,and apatinib+RT group(combined group).Flow cytometry was used to detect the apoptotic rates of the cells in various groups;wound healing assay was used to detect the migration rates of the cells in various groups;ELISA method was used to detect the levels of vascular endothelial growth factor(VEGF)in the cell culture supernatant in various groups.Results:The MTT results showed that the IC20 of apatinib was 1.32 μmol·L-1,and this concentration was used for subsequent experiments,and the X-ray irradiation dose for the follow-up experiments was 2 Gy.Compared with control group,the apoptotic rates of the cells in apatinib group and RT group had no significant differences(P＞0.05),while the apoptotic rate of the cells in combined group was increased(P＜0.05).Compared with control group,the migration rates of the cells in apatinib group,RT group,and combined group were decreased(P＜0.05);compared with apatinib group and RT group,the migration rate of the cells in combined group was decreased(P＜0.05).Compared with control group,the levels of VEGF in the cell culture supernatant in apatinib group and combined group were decreased(P＜0.05);compared with apatinib and RT group,the level of VEGF in the cell culture supernatant in combined group was decreased(P＜0.05).Conclusion:Apatinib combined with radiotherapy significantly inhibits the proliferation and migration of the HepG2 cells in vitro and induces the apoptosis;its effect may be related to the inhibition of VEGF secretion by cells.

Objective: To investigate the effects of lactoprotein iron chelates on rats with iron deficiency anaemia (IDA), so as to provide insights into developing and utilizing novel iron supplements. Methods: Seventy weaning female SPF-graded rats of the SD strain were randomly divided into the control group (A), model group (B), ferrous sulfate group (C), lactoferrin group (D), lactoferrin iron chelate group (E), Casein oligopeptide iron chelate group (F) and whey protein oligopeptide iron chelate group (G), with 10 rats in each group. The rats in group A were fed with normal diet, and the others were fed with poor iron diet for IDA modeling. The corresponding interventions were given by intragastric administration once a day. The iron ion concentrations of group C, E, F and G were 2.0 mg/kg, and the protein and oligopeptide concentrations of group D, E, F and G were 2 000 mg/kg. Body weight and hemoglobin of rats were measured weekly during 21-day intervention. At the end, peripheral blood samples were collected, and blood routine, iron metabolism and liver function indicators were determined. Results: After the intervention, among blood routine indicators, the rats in group C, E, F and G showed elevated hemoglobin, red blood cell, mean corpuscular volume and hematocrit, and decreased free protoporphyrin and mean corpuscular hemoglobin concentration when compared with the rats in group B (all P<0.05); among iron metabolism indicators, the rats in group C, E and G showed elevated serum ferritin, the rats in group C, E, F and G showed elevated serum iron, the rats in group C, D, E, F and G showed decreased unsaturated iron binding capacity and total iron binding capacity when compared with the rats in group B (all P<0.05); among liver function indicators, the rats in group E and G showed decreased alanine transaminase when compared with the rats in group B (both P<0.05). Conclusions Lactoprotein alone could not completely improve IDA in rats compared with traditional iron supplement (ferrous sulfate). Lactoprotein iron chelate, especially whey protein oligopeptide iron chelate, could significantly improve IDA, iron reserve and liver function damage in rats.

Objective: To assess the effects of subchronic intake of high-dose Dendrobium officinale on body weight, food intake, food utilization, and blood biochemical parameters in rats, so as to provide insights into assessment of edible safety of D. officinale. Methods: Eighty SPF-grade SD rats were randomly divided into the low-, medium- and high-dose groups and the control group, of 10 male and 10 female rats in each group. Rats in the low-, medium- and high-dose groups were administered with D. officinale feeds at doses of 2.0, 4.0, and 8.0 g/kg body weight, respectively, while animals in the control group were given basic diet for successive 13 weeks. The rat body weight, food intake, food utilization, and blood biochemical parameters were compared between groups. Results: Normal diet and activity was seen in all rats, and no abnormal syndromes, signs or deaths were found during the study. There were no significant differences in rat body weight, food intake, total weight gain, total food intake, alanine aminotransferase, aspartate aminotransferase, urea nitrogen, creatinine, triacylglycerol, cholesterol, total protein, albumin, albumin/globulin ratio or blood glucose among four groups (P>0.05). The food utilization 7 weeks post-administration [(8.71%±0.78%) vs. (10.54%±1.37%), P<0.05] and the total food utilization [(18.00%±0.41%) vs. (19.51%±1.21%), P<0.05] were significantly lower in male rats in the high-dose group than in the control group. Conclusion Subchronic intake of high-dose D. officinale shows no toxicity in rats, and reduced food utilization may be associated with the health function of D. officinale in male rats.

Objective:To construct the pathological classification prediction model for malignant pulmonary pure ground-glass nodule (pGGN) patients based on CT imaging and to analyze the predictive efficacy.Methods:A total of 193 pulmonary pGGN patients with histopathological findings who underwent surgical treatment in 3201 Hospital from January 2018 to December 2022 were retrospectively included, with 217 lesions. All patiens were divided into invasive adenocarcinoma group (68 patients, 73 lesions) and non-invasive adenocarcinoma group (125 patients, 144 lesions) based on whether they were invasive adenocarcinoma; The clinical feature data and CT imaging parameters were compared between the two groups; Multivariate logistic regression analysis was used to analyze the risk factors of malignant lung pGGN diagnosed as invasive adenocarcinoma; A logistic prediction model for pathological classification of malignant lung pGGN was constructed to analyze its predictive efficacy using receiver operator characteristic (ROC) curves.Results:The percentages of burr signs in invasive adenocarcinoma group and non-invasive adenocarcinoma group were 34.25% (25/73) and 5.56% (8/144), respectively; The proportion of internal vascular signs was 93.15% (68/73) and 18.75% (27/144), respectively; The air bronchial signs were 67.12% (49/73) and 12.50% (18/144), respectively, with statistically significant differences ( χ2=30.93, P<0.001; χ2=108.95, P<0.001; χ2=67.72, P<0.001). The maximum CT value of nodular plain scan in invasive adenocarcinoma group (-527.82±72.95) HU, was significantly higher than that in non-invasive adenocarcinoma group (-592.79±86.47) HU, with a statistically significant difference ( t=-5.50, P<0.001). The results of multivariate analysis showed that spicule sign ( OR=8.93, 95% CI: 1.99-39.97, P=0.004), air bronchial sign ( OR=8.16, 95% CI: 2.91-22.86, P<0.001), internal vascular sign ( OR=48.39, 95% CI: 14.81-158.07, P<0.001) and the maximum CT value of plain scan ( OR=1.01, 95% CI: 1.00-1.02, P=0.001) were independent factors for the diagnosis of malignant pulmonary pGGN as invasive adenocarcinoma. Using burr sign, air bronchogram sign, internal vascular sign, maximum CT value of plain scan, and logistic regression model P-value to predict the pathological classification of malignant lung pGGN, the optimal cutoff values were 0.50, 0.50, 0.50, -547.23 HU, 0.46, and the area under the curve was 0.64, 0.77, 0.87, 0.69 and 0.96, respectively. The sensitivity was 34.25%, 67.12%, 93.15%, 82.19% and 89.04%, and the specificity was 94.44%, 87.50%, 81.25%, 46.53% and 92.36%, respectively, with the Jordan index being 28.69%, 54.62%, 74.40%, 28.72% and 81.40%. Conclusion:Patients with malignant pulmonary pGGN who have concomitant spicule sign, air bronchial sign, internal vascular sign, and maximum CT value on plain scan have a higher risk of being diagnosed with invasive adenocarcinoma; The predictive model constructed based on spicule sign, air bronchial sign, internal vascular sign, and maximum CT value on plain scan has shown good predictive performance in assisting the differential diagnosis of malignant pulmonary pGGN pathological classification.

Objective:To construct a targeted and accurate evaluation system for facial and cervical wounds and scars of burn patients.Methods:The method combining literature analysis and survey research was adopted, and the basic principles of item system construction were followed. From June to August 2020, based on the aesthetic standards of facial and cervical plastic surgery, the topographic map assessment system for facial and cervical wounds and scars of burn patients was preliminarily formed, focusing on the assessment of wounds and scars in the necks and faces of patients after burns. In September 2020, 38 experts in the relevant fields were consulted in advance and the questionnaire was revised according to the experts' opinions. From December 2020 to March 2021, the Delphi method was applied to conduct inquiry by correspondence with 35 experts in relevant fields from Guangzhou, Shenzhen, Shanghai, Beijing, and other cities, who met the inclusion criteria, and the items were screened and established. The effective recovery rate of inquiry questionnaire was calculated to determine the level of enthusiasm of experts, the average authority coefficient of all items was calculated to determine the level of expert authority, the average importance expert score, the average coefficient of variation, and the average full score rate of all the third-level items were calculated to determine the concentration of expert opinions, the average coefficients of variation and Kendall's harmony coefficients of the importance, sensitivity, and operability expert scores of all the third-level items were calculated to determine the degree of coordination of expert opinions. The Kendall's harmony coefficients for the importance, sensitivity, and operability expert scores of all the third-level items were statistically analyzed with chi-square test.Results:Among the 35 experts consulted by Delphi method, mainly were male, aged (48±10) years, with 8-38 years of working experience, mainly with associate senior titles and above, all with a bachelor's degree or above education background, and of whom 11 were burn experts, 7 were wound repair experts, 4 were plastic surgery experts, and 13 were rehabilitation medicine experts. Finally, a topographic map assessment system for facial and cervical wounds and scars of burn patients was formed, including 4 first-level items, 21 second-level items, 40 third-level items, and 1 mask. The effective recovery rate of inquiry questionnaire was 100% (35/35). The average authority coefficient of all items was 0.89. The average importance expert score was 4.67, the average coefficient of variation of importance expert score was 0.01, and the average full score rate of all the third-level items was 86.3%. The average coefficients of variation of the importance, sensitivity, and operability expert scores of all the third-level items were 0.01, 0.01, and 0.02, respectively. The Kendall's harmony coefficients for the importance, sensitivity, and operability expert scores of all the third-level items were statistically significant (with χ2 values of 1 201.53, 745.67, and 707.07, respectively , P<0.05). Conclusions:The established topographic map assessment system for facial and cervical wounds and scars of burn patients has high scientificity and reliability, which can be used for the evaluation of facial and neck wounds or scars in burn patients.

Stem cell transplantation has great potential in the treatment of ischemic stroke, and bone marrow mesenchymal stem cells (BMSCs) are the most widely studied. Studies have shown that BMSCs mainly perform their functions in a paracrine manner, and the exosomes released by BMSCs show biological activities similar to BMSCs. As a cell-free therapy, BMSCs exosomes have made a lot of progress in the field of ischemic stroke. This article reviews the research progress of BMSCs-derived exosomes in the treatment of ischemic stroke.

Objective By comparing the physical properties (cell area, volume and elastic modulus) of red blood cells (RBCs) between newborn infants and the elderly over 80 years old, and correlation with the physiological and biochemical parameters such as total cholesterol and glycosylated hemoglobin, the effects of different ages and biochemical parameters on RBC physical properties were analyzed. Methods The mcropipette aspiration was used to measure the surface area, volume and elastic modulus of erythrocytes in newborn infants and the elderly over 80 years old, and the data were analyzed by statistical distribution analysis, correlation analysis and regression analysis. Results The mean values of RBC volume, surface area and elastic modulus in the elderly over 80 years old were smaller than those in newborn infants, and the mean values of RBC mechanical parameters in the same age group were not significantly different. The erythrocytes geometric parameter distribution of newborn infants was more concentrated than that of the elderly, while the elastic modulus distribution of newborn infants was more dispersed than that of the elderly. The mechanical properties of RBCs in newborn infants were highly correlated with the total cholesterol and gestational week; the mechanical properties of RBCs in the elderly were highly correlated with diastolic blood pressure and glycated hemoglobin. Conclusions There are significant differences in physical properties of RBCs between newborn infants and the elderly over 80 years old, and the biochemical parameters that affect physical properties of RBCs at different ages are also different.

Objective: To observe the effect of 5-hudroxymethyl-2-furfural (5-HMF) on glycolipid metabolism and hepatic function in mice with type 2 diabetes mellitus (T2DM) and hepatic injury. Methods: A low, a medium and a high 5-HMF dose group, a model group, and a control group were designed, with ten female ICR mice in each group. The low, medium and high dose group were given 0.27, 0.80 and 2.67 mg/kgbw 5-HMF, respectively, for 12 weeks; while the model group and the control group were given volume controlled deionized water. The model group and three dose groups were fed with high-fat and high-sugar food (36%), and the intraperitoneal injection of alloxan (60 mg/kgbw) was executed in the 10th and 11th week; the control group were fed with normal food. The body weight, blood glucose, blood lipid, and liver function of mice were determined regularly. The livers were stained by periodic acid Schiff and the changes in pathology were observed. Results: Compared with the control group, the serum levels of glucose (GLU), low density lipoprotein cholesterol (LDL-C), high density lipoprotein cholesterol (HDL-C), alanine aminotransferase (ALT), aspartate aminotransferase (AST), lactate dehydrogenase (LDH) were significantly higher in the model group (P<0.05). Compared with the model group, the AST level in the low and high 5-HMF dose group, and the LDH level in the low, medium and high 5-HMF dose group, were significantly lower (P<0.05). There were no significant differences in the levels of GLU, total cholesterol, LDL-C, triacylglycerol, HDL-C and ALT between the model group and the three dose groups (P>0.05). Moderate to severe vacuolar degeneration was observed in the model group, while mild vacuolar degeneration was observed in the high dose group. Medium or large amount of hepatic glycogen granules were observed in the high dose group and the model group. Conclusion Under the conditions of this experiment, 5-HMF does not show any obvious function of reducing blood glucose and lipid in the mice with T2DM and liver injury, but show some protective effects on liver function．

Objective:To observe the clinical effect of Yiqi Yangjing recipe combined with sticking therapy on lung cancer pleural effusion.Methods:From December 2017 to August 2019, 68 patients with advanced lung cancer and pleural effusion in Pudong New Area Hospital of Traditional Chinese Medicine were selected and randomly divided into two groups by random number table method, with 34 cases in each group.The control group was given furosemide orally on the basis of routine nutritional support treatment, and the treatment group was given Yiqi Yangjing prescription orally and traditional Chinese medicine sticking therapy on the basis of the control group.Both two groups were treated for 6 weeks.The changes of pleural fluid volume and quality of life scores were observed and compared between the two groups.Results:The total effective rate in the treatment group was 70.5%(24/34), which in the control group was 47.1%(16/34), the difference was statistically significant between the two groups(χ 2=3.886, P<0.05). The total effective rate of TCM syndrome integral was 64.7%(22/34) in the treatment group, and 35.3%(12/34) in the control group, the difference was statistically significant between the two groups(χ 2=5.800, P<0.05). After treatment, the overall quality of life score of the treatment group(55.74±5.15)points, which was higher than that of the control group[(51.91±5.20)points]( t=56.130, P<0.05). Conclusion:Yiqi Yangjing recipe combined with traditional Chinese medicine sticking therapy can effectively improve the clinical efficacy of lung cancer hydrothorax, improve the quality of life of patients.