BACKGROUND:Magnetic nanomaterials,as a hot topic in the biomedical field in recent years,are often used to enhance the targeted delivery of drugs to the affected area.OBJECTIVE:To investigate the effects of magnetic nano drug carriers on skeletal muscle injury markers and inflammatory responses in rats with sports injuries.METHODS:Magnetic nanoparticles were prepared.A total of 88 male SD rats were randomly divided into a blank group(n=8),an injury control group(n=32),a Yunnan Baiyao group(n=24),and a magnetic nano-drug carrier group(n=24)by using a random number table method.The latter three groups were modeled with exercise-induced muscle injury(treadmill slope of-16°,running speed of 16 m/min,and training time of 120 min).Immediately after exercise,after verifying the success of the model,Yunnan Baiyao patch was applied to the gastrocnemius muscle of the rats in the Yunnan Baiyao group.Yunnan Baiyao patch loaded with magnetic nanoparticles was applied to the gastrocnemius muscle of the rats in the magnetic nano-drug carrier group.At 24,48,and 120 hours after exercise,blood was drawn from the abdominal aorta of rats to detect the activities of creatine kinase and lactate dehydrogenase,as well as the levels of myoglobin,interleukin-6,and tumor necrosis factor-α.Hematoxylin-eosin staining was used to observe the infiltration of inflammatory cells in the gastrocnemius muscle.RESULTS AND CONCLUSION:(1)Compared with the blank group,the levels of myoglobin,creatine kinase,lactate dehydrogenase and tumor necrosis factorα in the injury control group at 24,48 and 120 hours after exercise were increased(P＜0.05),and the level of interleukin 6 at 24 and 120 hours after exercise was increased(P＜0.05).Compared with the injury control group,the level of myoglobin in the Yunnan Baiyao group at 24 and 48 hours after exercise was decreased(P＜0.05),the activities of creatine kinase and lactate dehydrogenase at 24,48 and 120 hours were decreased(P＜0.05),and the levels of interleukin 6 and tumor necrosis factor α at 120 hours after exercise were decreased(P＜0.05).Compared with the Yunnan Baiyao group,the level of myoglobin in the magnetic nano-drug carrier group at 24 and 48 hours after exercise was decreased(P＜0.05),the activities of creatine kinase and tumor necrosis factor α at 48 and 120 hours after exercise were decreased(P＜0.05),and the lactate dehydrogenase activity was reduced(P＜0.05).(2)Hematoxylin-eosin staining showed that a large number of inflammatory cells infiltrated in the muscle fibers of the injury control group 24 hours after exercise,and then the inflammatory cell infiltration gradually decreased,and the local damaged muscle fibers began to regenerate 120 hours after exercise.A large number of inflammatory cells infiltrated in the muscle fibers of the Yunnan Baiyao group and the magnetic nano-drug carrier group 24 hours after exercise,and then the inflammatory cell infiltration gradually decreased,and the damaged muscle fibers were regenerating 120 hours after exercise,and there was no significant difference from the blank group.(3)The results show that Yunnan Baiyao patch combined with magnetic nanoparticles can accelerate the recovery of exercise-induced muscle injury in rats,and the effect is better than that of Yunnan Baiyao alone.

BACKGROUND:Magnetic nanomaterials,as a hot topic in the biomedical field in recent years,are often used to enhance the targeted delivery of drugs to the affected area.OBJECTIVE:To investigate the effects of magnetic nano drug carriers on skeletal muscle injury markers and inflammatory responses in rats with sports injuries.METHODS:Magnetic nanoparticles were prepared.A total of 88 male SD rats were randomly divided into a blank group(n=8),an injury control group(n=32),a Yunnan Baiyao group(n=24),and a magnetic nano-drug carrier group(n=24)by using a random number table method.The latter three groups were modeled with exercise-induced muscle injury(treadmill slope of-16°,running speed of 16 m/min,and training time of 120 min).Immediately after exercise,after verifying the success of the model,Yunnan Baiyao patch was applied to the gastrocnemius muscle of the rats in the Yunnan Baiyao group.Yunnan Baiyao patch loaded with magnetic nanoparticles was applied to the gastrocnemius muscle of the rats in the magnetic nano-drug carrier group.At 24,48,and 120 hours after exercise,blood was drawn from the abdominal aorta of rats to detect the activities of creatine kinase and lactate dehydrogenase,as well as the levels of myoglobin,interleukin-6,and tumor necrosis factor-α.Hematoxylin-eosin staining was used to observe the infiltration of inflammatory cells in the gastrocnemius muscle.RESULTS AND CONCLUSION:(1)Compared with the blank group,the levels of myoglobin,creatine kinase,lactate dehydrogenase and tumor necrosis factorα in the injury control group at 24,48 and 120 hours after exercise were increased(P＜0.05),and the level of interleukin 6 at 24 and 120 hours after exercise was increased(P＜0.05).Compared with the injury control group,the level of myoglobin in the Yunnan Baiyao group at 24 and 48 hours after exercise was decreased(P＜0.05),the activities of creatine kinase and lactate dehydrogenase at 24,48 and 120 hours were decreased(P＜0.05),and the levels of interleukin 6 and tumor necrosis factor α at 120 hours after exercise were decreased(P＜0.05).Compared with the Yunnan Baiyao group,the level of myoglobin in the magnetic nano-drug carrier group at 24 and 48 hours after exercise was decreased(P＜0.05),the activities of creatine kinase and tumor necrosis factor α at 48 and 120 hours after exercise were decreased(P＜0.05),and the lactate dehydrogenase activity was reduced(P＜0.05).(2)Hematoxylin-eosin staining showed that a large number of inflammatory cells infiltrated in the muscle fibers of the injury control group 24 hours after exercise,and then the inflammatory cell infiltration gradually decreased,and the local damaged muscle fibers began to regenerate 120 hours after exercise.A large number of inflammatory cells infiltrated in the muscle fibers of the Yunnan Baiyao group and the magnetic nano-drug carrier group 24 hours after exercise,and then the inflammatory cell infiltration gradually decreased,and the damaged muscle fibers were regenerating 120 hours after exercise,and there was no significant difference from the blank group.(3)The results show that Yunnan Baiyao patch combined with magnetic nanoparticles can accelerate the recovery of exercise-induced muscle injury in rats,and the effect is better than that of Yunnan Baiyao alone.

Objective : To develop an endoscopic automatic detection system in early gastric cancer (EGC) based on a region-based convolutional neural network ( Mask R-CNN) ． Methods : A total of 3 579 and 892 white light images (WLI) of EGC were obtained from the First Affiliated Hospital of Anhui Medical University for training and testing，respectively．Then，10 WLI videos were obtained prospectively to test dynamic performance of the RCNN system．In addition，400 WLI images were randomly selected for comparison with the Mask R-CNN system and endoscopists．Diagnostic ability was assessed by accuracy，sensitivity，specificity，positive predictive value ( PPV) ， and negative predictive value (NPV) . Results : The accuracy，sensitivity and specificity of the Mask R-CNN system in diagnosing EGC in WLI images were 90. 25% ，91. 06% and 89. 01% ，respectively，and there was no significant statistical difference with the results of pathological diagnosis．Among WLI real-time videos，the diagnostic accuracy was 90. 27%．The speed of test videos was up to 35 frames / s in real time．In the controlled experiment， the sensitivity of Maks R-CNN system was higher than that of the experts (93. 00% vs 80. 20% ，χ2 = 7. 059，P < 0. 001) ，and the specificity was higher than that of the juniors (82. 67% vs 71. 87% ，χ2 = 9. 955，P＜0. 001) ， and the overall accuracy rate was higher than that of the seniors (85. 25% vs 78. 00% ，χ2 = 7. 009，P＜0. 001) . Conclusion The Mask R-CNN system has excellent performance for detection of EGC under WLI，which has great potential for practical clinical application.

Objective:To evaluate the effect of down-regulating lncRNA LINC00263 targeting miR-4458 on the proliferation, migration, invasion and radiosensitivity of breast cancer SK-BR-3 cells.Methods:The expression differences of LINC00263 in breast cancer tissues, adjacent tissues, normal breast epithelial cells and breast cancer cells were determined by qRT-PCR. Transfection of LINC00263 shRNA in breast cancer SK-BR-3 cells down-regulated the expression of LINC00263, and the cloning experiment was used to detect the radiosensitivity. Breast cancer SK-BR-3 cells were treated with 6 Gy irradiation. CCK-8 assay was employed to detect cell proliferation. Flow cytometry was adopted to detect cell apoptosis. Transwell chamber test was performed to detect cell migration and invasion. Western blot was used to detect the expression levels of C-Caspase-3 and C-Caspase-9, MMP-2 and MMP-9 proteins. Bioinformatics software predicted that LINC00263 and miR-4458 had complementary binding sites, and the luciferase reporter system was utilized determine the targeting relationship between LINC00263 and miR-4458. LINC00263 shRNA and miR-4458 inhibitor were co-transfected into breast cancer SK-BR-3 cells, and 6 Gy irradiation was given to detect the changes in cell proliferation, apoptosis, invasion and migration.Results:The expression level of LINC00263 in breast cancer tissues was higher than that in adjacent tissues. The expression level of LINC00263 in breast cancer cells was higher compared with that in normal breast epithelial cells. The radiosensitivity of breast cancer SK-BR-3 cells was increased after transfection of LINC00263 shRNA. Transfection of LINC00263 shRNA and radiation exerted a synergistic effect, jointly inhibited breast cancer cell proliferation, migration and invasion, promoted cell apoptosis, up-regulated the expression levels of C-Caspase-3 and C-Caspase-9 proteins in cells, and down-regulated those of MMP-2 and MMP-9 proteins. Down-regulation of LINC00263 targetedly up-regulated miR-4458 expression. miR-4458 inhibitor reversed the inhibitory effect of LINC00263 shRNA combined with radiation on the proliferation, migration, invasion and apoptosis promotion of breast cancer SK-BR-3 cells.Conclusion:Down-regulating lncRNA LINC00263 targeting miR-4458 inhibits the proliferation, migration and invasion of breast cancer SK-BR-3 cells, and improves cell radiosensitivity.

Objective:To investigate the changes in peripheral blood and liver-infiltrating natural killer-like B (NKB) cells in patients with primary hepatocellular carcinoma (HCC), and to assess the influence of IL-18 on NKB cells in vitro and the underlying mechanism. Methods:Forty-three HCC patients and 21 normal controls (NC) were enrolled in the study. Peripheral blood samples were collected to isolate plasma and peripheral blood mononuclear cells (PBMC). Intrahepatic lymphocytes (IHL) were isolated from tumor tissues and para-tumor tissues obtained from 16 HCC patients who received surgery. IL-12, IL-18 and IL-18 binding protein (IL-18BP) levels in plasma were measured by enzyme linked immunosorbent assay. The percentages of CD3 -NKp46 + CD19 + NKB cells and IL-18 + NKB cells in PBMC and IHL were analyzed by flow cytometry. Changes in the percentages of NKB cells and IL-18 + NKB cells were measured after stimulating PBMC and IHL with recombinant human IL-18 (1 ng/ml and 10 ng/ml). Changes in IL-18BP levels in the culture supernatants and phosphorylated nuclear factor-κB (NF-κB) in NKB cells were also assessed. Student′s t test, one-way analysis of variance or LSD-t test was used for statistical analysis. Results:There was no significant difference in plasma IL-12 level between HCC patients and NC ( P=0.245). Compared with NC, HCC patients had decreased IL-18 level in plasma [(224.3±58.89) pg/ml vs (327.0±52.27) pg/ml, P<0.000 1], but increased IL-18BP level [(4.421±0.97) ng/ml vs (0.92±0.18) ng/ml, P<0.000 1]. The percentages of peripheral blood NKB cells and IL-18 + NKB cells were lower in HCC patients than in NC [(2.68±1.23)% vs (8.88±2.95)% and (54.42±12.60)% vs (69.74±12.65)%, both P<0.000 1]. The percentage of NKB cells in IHL was reduced in tumor tissues as compared with that in para-tumor tissues [(2.89±0.86)% vs (4.66±1.17)%, P<0.000 1]. Moreover, the percentage of IL-18 + NKB cell was also down-regulated in tumor tissues as compared with that in para-tumor tissues [(51.50±13.18)% vs (62.13±9.24)%, P=0.013]. Recombinant human IL-18 stimulation reduced the IL-18BP level in the culture supernatants ( P<0.05). IL-18 stimulation at 1 ng/ml did not affect NKB cell percentage, IL-18 + NKB cell percentage or NF-κB phosphorylation in NKB cells from PBMC or IHL ( P>0.05), while 10 ng/ml of IL-18 not only elevated NKB cell percentage and IL-18+ NKB cell percentage, but also promoted NF-κB phosphorylation in NKB cells ( P<0.01). Conclusions:In vitro stimulation with high concentration of IL-18 might promote NF-κB phosphorylation by inhibition of IL-18BP expression. This process might play a positive feedback role to induce the activation of NKB cells and IL-18 secretion.

[ ABSTRACT] AIM:To investigate the effect of DEK downregulation on the apoptosis of gastric carcinoma SGC-7901 cells, and to explore its associations with NF-κB signaling pathway and apoptosis related proteins.METHODS:SGC-7901 cells with different treatments were divided into 3 groups including untreated group, control siRNA group and DEK siRNA group.The expression of DEK at mRNA and protein levels in the SGC-7901 cells was detected by real-time PCR and Western blot.The cell apoptosis was examined by flow cytometry.Furthermore, the activities of caspase-3 and caspase-9 in the SGC-7901 cells were investigated by Caspase-Glo?-3/9 kit.Finally, the expression of key regulatory pro-tein p65 of NF-κB signaling pathway and apoptosis-related proteins Bcl-2 and Bax in the SGC-7901 cells was investigated by Western blot.RESULTS:Compared with untreated group and control siRNA group, the expression of DEK at mRNA and protein levels was significantly downregulated in DEK siRNA group (P<0.05).In addition, the ratios of early phase apoptosis and total apoptosis in DEK siRNA group were markedly higher than those in untreated group and control siRNA group (P<0.05).Most notably, the decrease in p65 and Bcl-2 proteins, increase in Bax protein and the increases of caspase-3 and caspase-9 activities were observed in DEK siRNA group.CONCLUSION:Downregulation of DEK mediates cell apoptosis of gastric carcinoma may be tightly associated with NF-κB signaling pathway.

Objective To explore the effects of family member's behaviors on outcome of patients with acute cerebral infarction. Methods 160 cases with acute cerebral infarction were investigated with 9 kinds of family member's behavior. Results 9 kinds of family member's behavior were all closely related to the outcome of patients with acute cerebral infarction. Conclusion Family member's behavior was closely related to the patients with acute cerebral infarction

Objective To explore the effect of psychological intervention of the patients with acute stroke in pre-hospital first aid. Methods 148 patients with acute stroke who had been treated by psychology in pre-hospital first aid were chosen and interviewed, comparing with 100 patients with acute stroke in hospital in same state. Results There was a significant difference between two groups about realization to disease, attitude to disease, mental reaction, treating confidence, compliance, and so on. Conclusion Psychological intervention can improve the patients with acute stroke in pre-hospital first aid effectly in the realization about disease, correct attitude about disease, capability of fighting diseases, confidence for recovery from the illness and compliance.

Objective To study the disease chart among pre-hospital first aid in Tangshan people'hospital.Methods Prospectively collecting data of pre-hospital first aid 2580 patients from 2006 to 2007,analyzing the data,sex,age,visitingtime,emergency diagnosisand results,etc.Results Among pre-hospital first aid 2580 patients,traf-rice diseases,neurosystem diseases,cerebral infarction,coronary heart disease are the first three diseases.The highest times of pre-hospital first aid are 8:00～10:00,14:00～16:00 and 20:00～22:00.The admission rate is 44.46%.Conclusion Pre-hospital first aid should be based on the data,age,visiting time of the disease,scientifically arranging pre-hospital,training for pre-hospital first aid staff,so,the patients will be the fast and best pre-hospital flint aid.

ObjectiveTo observe the effect of cognitive therapy and acupuncture on insomnia. Methods72 insomnia sufferers were divided into two groups averagely. 36 sufferers were treated with cognitive therapy and acupuncture (treatment group), and other 36 sufferers were treated with acupuncture (control group) only.ResultsA month after treatment, ,15 sufferers were cured, 18 sufferers were obviously improved, 2 sufferers were improved and one did not show any improvement in the treatment group.Otherwise, 6 sufferers were cured, 12 sufferers were obviously improved, 12 sufferers were improved and 6 did not show any improvement in the control group. (P<0.05)ConclusionCognitive therapy and acupuncture used together shows more efficacy on insomnia compared with acupuncture alone.