Objective: To investigate the effect of spleen tyrosine kinase (Syk) on invasion and migration in human breast cancer cells and analyze its action mechanism. Methods: Full-length cDNA of Syk was transfected into Syk-negative human breast cancer cells MDA-MB-231 via liposome mediation. The invasion and migration ability of MDA-MB-231 cells was detected by Transwell ECM method. The expressions of invasion and migration-related molecule vasculars, endothelial growth factor (VEGF) and matrix metalloproteinaseses-9 (MMP-9), were detected by flow cytometry (FCM) and enzyme-linked immunosorbant assy (ELISA) methods. Results: The number of membrane-passing cells every 5 high power fields was significantly decreased in Syk-transfected MDA-MB-231 cells compared with those transfected with blank vector or without transfection (P < 0.05). The expressions of VEGF and MMP-9 proteins were obviously reduced (P < 0.05). Conclusion: Syk cDNA inhibited the invasion and migration of tumor cells by down-regulating the expressions of VEGF and MMP-9.

Objective To explore biomechanical properties and clinical results of a new type of dynamic Hoffmann external fixator(NDHEF)for tibial shaft fractures.Methods Fifteen specimens of adult tibia were randomly divided into three groups and osteotomized obliquely in the mid part of the tibia.These specimens were fixed with NDHEF,improved Hoffmann external fixator(IHEF)and maltifunctional external fixator(MEF)re- spectively.The axial compression,bending,torsion and stress shielding tests were performed on the specimens in each group for biomechanical comparison.From 1995 to 2004,40 cases of open tibiofihular fractures were treated with NDHEF and 88 cases with IHEF and their clinical results were analyzed and compared.Results The biomechanical tests showed that the compressive rigidity,bending rigidity and torsion rigidity of NDHEF were similar to those of IHEF(P＞0.05)but significantly stronger than those of MEF(P＜0.05).The stress shielding of NDHEF was obviously weaker than that of other external fixators(P＜0.05).All the 128 cases were followed up for 12 to 36 months(average,16.8 months).The mean substantial bone healing time for NDHEF treatment was 22.3 weeks and that for IHEF was 26.8 weeks.The difference was significant(P＜0.05).The rates of delayed union and malunion were all 7.5% for NDHEF,but 15.9% and 4.5% respectively for IHEF.The difference was insignificant (P＞0.05).Conclusions The biomechanical performance of NDHEF is superior to that of IHEF,for it can diminish the stress shielding and accelerate bone healing.It is a good external fixator for tibial fractures.

Child ; Cochlear Implantation ; Cochlear Implants ; Evoked Potentials, Auditory, Brain Stem ; Hearing Loss, Central ; physiopathology ; Humans ; Vestibulocochlear Nerve Diseases ; physiopathology

Abnormalities, Multiple ; diagnosis ; Colon ; abnormalities ; Humans ; Infant, Newborn ; Male ; Peristalsis ; Syndrome ; Urinary Bladder ; abnormalities

AIM:To investigate the influence of matrine (MA) on the phenotype switching of mouse mono-cytes and alveolar macrophages induced by bleomycin ( BLM) .METHODS:All mice were randomly divided into normal saline (NS) group, BLM group, BLM+NS group and BLM +MA group.The mice were administered with BLM at 2.5 mg/kg via oropharyngeal instillation .The mice in BLM+MA group were treated with MA (15 mg· kg-1 · d-1 ) by oral gavage following BLM administration .The mice were sacrificed on days 3, 7, 14, and 21.The lungs were removed for pathological analysis .The circulating monocyte subsets and polarization state of bronchoalveolar lavage fluid ( BALF)-de-rived alveolar macrophages were analyzed by flow cytometry .RESULTS:The results of HE and Masson trichrome staining in BLM and BLM+NS groups exhibited classical pathological stages of lung fibrosis , including acute inflammation phase and later fibrosis phase .Compared with BLM +NS group, MA treatment alleviated the inflammatory response and the de-gree of fibrosis induced by BLM (P<0.05).There was a rapid change of circulating Ly6Chi monocytes and its magnitude was positively associated with the pulmonary inflammatory response .An expansion of M2-like alveolar macrophages was positively correlated with the magnitude of lung fibrosis .Moreover , MA treatment partially normalized the phenotype switc-hing of monocytes and alveolar macrophages .CONCLUSION:Matrine treatment attenuates BLM-induced pulmonary injury partially via modulating the phenotype switching of monocytes and alveolar mocrophages .

Abstract: Objective　China was certified by World Health Organization as a malaria-free country in 2021. Malaria has become a rare infectious disease, and preventing the re-transmission of imported malaria and reducing deaths are the main challenges facing China after elimination of malaria. To analyze and clarify the characteristics of imported malaria deaths, and to provide prevention and treatment recommendations for overseas workers and health care workers. Methods　The data of 17 imported malaria deaths in the analysis of malaria deaths from 2016 to 2020 by the National Severe Malaria Treatment Expert Group were collected, and the relevant clinical epidemiological data and disease course records were analyzed. Results　The 17 malaria deaths were all imported from Africa with Plasmodium falciparum infection (malarial cerebral type), with no obvious regularity in the month of onset. Among them, 16 were male patients, 5 cases with underlying diseases such as diabetes mellitus, and 10 patients were first diagnosed in a second-level or lower hospital. Excluding patients who died of respiratory cardiac arrest in ambulances, the mean time difference between first onset and malaria diagnosis in 16 patients was 6.8 days (median 5.5 days), and the mean time between first onset and antimalarial treatment was 7.4 days (median 6 days), the mean time difference from initial onset to death was 10.3 days (median 8.5 days). Excluding cases with onset abroad and unknown time of return, all 14 patients developed the disease within 30 days after returning to China. Conclusion　All the fatal cases were infected with Plasmodium falciparum imported from Africa. The patients' awareness of actively seeking medical treatment is weak, and the delay in seeking medical treatment caused by the insufficient diagnosis and treatment capacity of health institutions at the township level and below is the main reason for the deaths. It is recommended to strengthen the self-protection awareness of staff in malaria-endemic areas overseas and raise their awareness of malaria. For returnees from areas with high malaria risk, primary medical institutions should pay attention to the patient's travel history in Africa, improve the awareness of malaria diagnosis, malaria diagnosis and treatment capabilities.

Actins ; metabolism ; Aged ; Breast Neoplasms ; metabolism ; pathology ; surgery ; Carcinoma ; metabolism ; pathology ; surgery ; Diagnosis, Differential ; Fasciitis ; metabolism ; pathology ; Female ; Fibroma ; metabolism ; pathology ; surgery ; Humans ; Keratin-5 ; metabolism ; Mastectomy, Modified Radical ; Neoplasms, Muscle Tissue ; metabolism ; pathology

Objective Infrared spectroscopy was used to study on both raw material and different degree water processing varieties extract of Radix Aconiti kusnezoffii,to observe the changes of main toxic components in processing,and thus to improve the quality of Radix Aconiti kusnezoffii processed products.Methods Fu Liye transform infrared spectroscopy was adopted to study the infrared spectrum characteristic of raw materials and different degree water processing varieties of.Radix Aconiti kusnezoffii.Results ①Aconitine and hypaconitine infrared spectrum showed that 1717 cm-1,1727 cm-1 and 1711 cm-1 is the C=O stretching vibration peak.It is a diester alkaloids characteristic peaks; ② although absorption peak of all vesicular samples had a certain change,it still existed diester alkaloids absorption peak,indicating the incomplete hydrolysis; ③ boiled aconite processing methods demonstrated diester alkaloids absorption peak shift in the water sample.Conclusion Diester alkaloids in Radix Aconiti kusnezoffii shows a positive relation with its time soaked in water.

One hundred Pseudomonas aeruginosa quorum-sensing-related genes were selected and their primers were synthesized. The fragments of specific sequences which are related QS genes were amplified by PCR. These verified sequences were inserted into the vector pMD-18T for sequencing. These DNA fragments were dotted onto glass slides to make cDNA microarray. Hybridization was performed with cy3/cy5-dCTP labeled probes. The scanning data of early stationary phase and mid-logarithmic phase indicated that 9 genes were up-regulated and 6 genes were down-regulated. Undergoing the different medicines,we took tobramycin as an example to compare the expression diversity. The results confirm that the QS cDNA chip is useful,and may contribute to better understand the mechanism of quorum-sensing,and can help us find the new targets for restraining the growth of Pseudomonas aeruginosa.

Objective To explore the anatomical characteristic of the third palmar interosseous mus- cle as well its dominate nerve,and to investigate the anatomical basis of difficult recovery of digitus minimus adduction.Methods Twenty aduh fresh hands without deformity and trauma were obtained.Dissect and observe the third palmar interosseous muscle and its dominate nerve and adjacent structure under surgical mi- croseope,measure the size of the third pahnar interosseous muscle and its dominate nerve,the data were pro- cessed by stastistics method.Results Among palmar interosseous muscles and its dominate nerves,the third palmar interosseous muscle and its dominate nerve is the smallest.There are conspicuous tendon bundle on the surface of the third palmar interosseous muscle partly,which have a potential compression on the third palmar interosseous muscle dominting nerve.Conclusion The third palmar interosseous muscle is the smal- lest among palmar interusseous muscles and it is the only digitus minimus adduction muscle.The sominating nerve of the third palmar interosseous muscle is small anti the tendon bundle of the third palmar interosseous muscle have a potential compression.All these can cast light on diffcult recovery of digitus minimus adduction.