Objective To compare the expression of myocardial connexin 43(Cx43)mRNA and its protein during early and late cardioprotection stages of exercise preconditioning.Methods Thirty-two Sprague-Dawley rats were randomly divided into a control group,an exhaustive exercise(EE)group,an early exercise preconditioning + exhaustive exercise(EEP+EE)group and a late exercise preconditioning + exhaustive exercise (LEP+EE) group,each of 8.All groups were given intervention as their group name indicated.Then in situ hybridization and real-time fluorescent quantitative PCR methods were used to detect the changes of myocardial Cx43mRNA and immunohistochemical method and Western blotting were used to detect the changes of Cx43 protein.Results Compared with EE group,there was significant increase in Cx43 mRNA and its protein expression in group EEP+EE and LEP+EE.Compared with EEP+EE group,no significant changes was found in situ hybridization and Cx43 Immunoreactivity in LEP+EE group,neither did significant differences in the expression of Cx43 mRNA and its protein.Conclusion EEP and LEP can significantly promote the expression of myocardial Cx43 mRNA and its protein respectively.However there is no significant changes of myocardial Cx43 mRNA and protein expression between the 2 time phases.It demonstrates that the expression of Cx43 in the early and late stage of myocardial protective effect was consistent with the changes of the early and late phase of the protective effect of EP.

Adult ; Facial Nerve Injuries ; etiology ; Foreign Bodies ; complications ; Humans ; Male ; Neck ; Parotid Gland

[Objective]To evaluate the value of clinical examination and magnetic resonance imaging in diagnosing chronic anterior cruciate ligament injury.[Method]Sixty-five patients with the diagnosis of chronic anterior cruciate ligament injury were retrospectively analyzed about the course of diagnosis and treatment.To gain the primary diagnosis through clinical examination,8 patients were performed magnetic resonance imaging.Finally all the patients were carried out arthroscopic surgery to make a final diagnosis.[Result]Arthroscopy found 53 cases with complete anterior cruciate ligament tears,12 cases with partial anterior cruciate ligament tears.In the complete anterior cruciate ligament tears cases,79.2% patients had positive anterior drawer test,96.2% had positive Lachman test and 92.5 % had positive pivot shift test.In the partial anterior cruciate ligament tears cases,16.7% patients had positive anterior drawer test,50.0% had positive Lachman test and 33.3 % had positive pivot shift test.The accuracy of MRI in diagnosing anterior cruciate ligament tears was 100%.[Conclusion]Clinical examination and magnetic resonance imaging can diagnose chronic anterior cruciate ligament effectively.

Objective To analyze risk factors for grenade throwing fractures and put forward corresponding preventive measures for the fractures during the military training in recruits,so as to reduce the happen in the military training.Methods The research is case-control study.The trial group and the control group (39 patients each) were followed up and investigated.The investigation indicators included height,body mass index (BMI),whether drinking carbonated beverage frequently,literacy,osteoporosis,throwing training score,throwing posture,warm-up sufficiently,region,whether attend often physical exercise before recruitment,exercise strength,and weather factor.Results There were significant differences in the warm-up sufficiency,attending physical exercise before recruitment,exercise intensity,throwing posture,weather factor between trial group and the control group in recruits.The logistic regression analysis showed that the lack of physical exercise before recruitment,strong exercise intensity,nonstandard throwing posture were the risk factors in grenade throwing fractures in recruits.Conclusion Sufficient warm-up,avoiding exhausted exercise and assault exercise,strict training in accordance with the standard throwing posture,regular participation in physical exercise before recruitment and training in warm season are effective methods for preventing grenade throwing fractures in recruits.

Objective To compare the two cell adhesion assay techniques based on 51 Cr release and 3H-TdR incorporation.Methods Firstly,the cells to be tested were cultured to confluence in the 96 well plate for 24 hours. After with 51 Cr or 3H-TdR label, the isotope labeled cells were add into plate wells and incubated for another 4 hours. Then the un-adhered cells were removed by gently washing. The cpm of two assay system were counted, the sensitivity and stability of two methods were compared.Results Assay methods based on 51 Cr release and 3H-TdR incorporation could both reflect the cell adhesion level correctly. In assaying sensitivity and stability showed that the 3H-TdR incorporation assay was better than in 51 Cr release assay.Conclusions Adhesion method based on isotope label could provide good sensitivity and stability. The sensitivity and stability of 3H-TdR incorporation is better than that of 51 Cr release assay.

Ebola virus disease (EVD) is a severe infectious disease caused by Ebola virus in humans and primates. The main clinical features are fever and bleeding. The disease was first identified in Zaire and Sudan in Africa in 1976. Since then, it has caused many large-scale epidemics in Africa. One of the largest and most complex Ebola outbreaks in history was the 2014-2016 outbreak in West Africa, which caused more cases and deaths than all previous outbreaks combined. As of 2022, about 35 000 EVD cases and 15 000 deaths have been reported. During the African pandemic, EVD also spread to other regions outside the African continent, such as the Americas and Europe, and became a public health issue of worldwide concern. In Africa, the re-emergence of the disease in Uganda and the Republic of Congo in 2022 has attracted much attention from the world. This article systematically summarizes the history, epidemiological distribution, route of infection, clinical symptoms, diagnosis, treatment, prevention and control of Ebola virus disease, so as to provide reference for relevant workers in China.

OBJECTIVETo study the inhibitory effect of wogonin on the growth and proliferation of breast cancer cells MDA-MB-23, and observe its effect on the adhesion, migration and invasion of MDA-MB-23 cells, in order to further study its molecular mechanism.

METHODMTT assay was used to detect the effect of wogonin on MDA-MB-23 cell growth. Ki-67 assay was adopted to test the effect of wogonin on cell proliferation. Scratch test, adherence test and invasion chamber assay were taken to detect the effect on the migration and invasion abilities of MDA-MB-231 cells. Proliferation and metastasis-related proteins and relevant signaling pathways were detected by Western blotting.

RESULTWogonin could remarkably inhibit the growth and proliferation of MDA-MB-231 cells, significantly inhibit migration, adhesion and invasion abilities of breast cancer cells at a low concentration, and effectively inhibit the expression of Survivin, Bcl-2, ICAM-1, MMP-2, MMP-9 proteins of MDA-MB-231 cells.

CONCLUSIONWogonin could notably inhibit growth and proliferation of breast cancer cells, and inhibit migration, adhesion and invasion of MDA-MB-231 cells. Its invasive and adhesive effects on MDA-MB-231 cells may be related to the decrease in ICAM-1, MMP-2, MMP-9 expressions.

Breast Neoplasms ; genetics ; metabolism ; pathology ; physiopathology ; Cell Line, Tumor ; Cell Movement ; drug effects ; Cell Proliferation ; drug effects ; Drugs, Chinese Herbal ; pharmacology ; Female ; Flavanones ; pharmacology ; Gene Expression Regulation, Neoplastic ; drug effects ; Humans ; Intercellular Adhesion Molecule-1 ; genetics ; metabolism ; Matrix Metalloproteinase 2 ; genetics ; metabolism ; Matrix Metalloproteinase 9 ; genetics ; metabolism ; Neoplasm Invasiveness ; Signal Transduction ; drug effects

Aged ; Atropine ; Electrocardiography ; Female ; Heart Rate ; drug effects ; Humans ; Male ; Muscarinic Antagonists ; pharmacology ; therapeutic use ; Preoperative Care ; methods ; Quinuclidines ; pharmacology ; therapeutic use

To prepare rivastigmine liposome, rivastigmine was loaded into liposome via ammonium sulfate gradient method. Its pharmacokinetic profile in rats was evaluated after intranasal administration. The size, zeta potential, entrapped efficiency and release of rivastigmine from the liposome in vitro were determined. Plasma concentration of rivastigmine was determined by high performance liquid chromatography-tandem mass spectrometry (HPLC/MS) using antipyrine as internal standard. The pharmacokinetic parameters were calculated by DAS 2.0. The entrapped efficiency of rivastigmine liposome was (33.41 +/- 6.58) %, with the mean diameter of 154-236 nm and zeta potential of (-10.47 +/- 2.41) mV. The release behavior of rivastigmine was fitting the first order equation in vitro. The pharmacokinetic studies indicated that the C(max), T(max) and AUC(0-infinity), of rivastigmine liposome were (1.50 +/- 0.15) mg x L(-1), 15 min and (89.06 +/- 8.30) mg x L(-') x min, respectively. Rivastimine liposome was absorbed rapidly, and could reach a certain concentration in rat plasma after intranasal delivery.

Afferent Pathways ; drug effects ; Animals ; Freund's Adjuvant ; adverse effects ; Ganglia, Sensory ; drug effects ; Hyperalgesia ; chemically induced ; Inflammation ; Male ; Morphine ; pharmacology ; Rats ; Rats, Sprague-Dawley