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Objective: To study the effect of PI3K-Akt signaling pathway on the openness degree of mitochondrial permeability transition pore (mPTP)in the aged model rats of myocardial ischemic preconditioning (IPC),and to clarify its possible mechanism.Methods:Thirty-five Wistar Wistar rats (aged 21-23 months)were randomly divided into ischemia reperfusion (I/R)group,I/R+Wort (Wortmannin,inhibitor of PI3K)group,IPC group and IPC+ Wort group (n=7).The models of I/R and IPC were established and 0.6 mg·kg-1 Wort were injected to the caudal veins of the rats in Wort group before reperfusion. After 120 min reperfusion, the myocardium tissue protein was extracted, and the Akt and p-Akt protein expression levels were detected by Western blotting method.The myocardial mitochondrial of rats was separated through differential centrifugation, and the superoxide level, SOD level and openness degrees of mPTP were determined by microplate reader. Results:Compared with I/R group (0.288±0.071),the expression level of p-Akt protein in myocardium tissue of the rats in IPC group (0.346±0.051)was increased (P 0.05).Compared with I/R group (1.15±0.15),the SOD activity in mitochondrial of the rats in IPC group (1.39±0.14)was increased (P 0.05).Compared with I/R group,the mPTP openness degree in IPC group was decreased (P 0.05).Compared with IPC group,the mPTP openness degree in IPC+ Wort group was increased (P < 0.05).Conclusion:The IPC of aged rats can inhibit the openness of mitochondrial permeability transition pore through activating the PI3K-Akt signaling pathway.
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Objective To investigate the correlation between serum cystatin-C (Cys-C) levels and cognitive impairment.Methods A perspective study involving 273 patients in our hospital was performed from 2013 to 2015.They were divided into the cognitive impairment group and the control group.Cys-C measurement results and cognitive impairment assessment scores were collected.Possible influence factors were adjusted,and the correlation between Cys-C levels and mild cognitive impairment was analyzed.Results The distribution of age,hypertension,diabetes mellitus,smoking,drinking,dyslipidemia,and creatinine showed significant differences between the groups at different Cys-C levels (all P＜0.05).There was a significant difference in the Cys-C level between the cognitive impairment group and the control group [(0.727±0.082) mg/L vs.(0.514±0.045)mg/L,t=23.68,P＜0.01].The Cys-C level was negatively correlated with the scores of mini-mental state examination (MMSE) and Montreal cognitive assessment (MOCA) in the cognitive impairment group (r =-0.318 and -0.572,P＜0.05).The incidence of cognitive impairment was elevated with increasing Cys-C levels (x2 =13.12,P＜0.01).Logistic regression analysis showed that high levels of Cys-C (OR=3.298,95％ CI:1.417-7.675,P=0.001),history of diabetes mellitus (OR=7.971,95％ CI:3.036-31.562,P =0.03),education level (OR =2.237,95 ％ CI:1.022-4.896,),smoking (OR =5.692,95 ％ CI:1.060-2.614),drinking (OR=1.227,95％ CI:0.083-1.228),and dyslipidemia (OR=2.267,95％ CI:1.177-4.366) are independent risk factors for cognitive impairment.Conclusions High serum cystatin C levels are closely correlated with the risk of cognitive impairment occurrence.
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OBJECTIVE:To systematically evaluate the efficacy and safety of prostaglandin E1 combined with hydration for the prevention of contrast-induced nephropathy(CIN)and provide evidence-based reference for the clinical treatment. METHODS:The PubMed,Medline (Ovid),EMbase (Ovid),Cochrane Library,VIP,CJFD and WanFang database were retrieved to collect the randomized controlled trails(RCT)of prostaglandin E1 combined with hydration for the prevention of CIN. After information collec-tion and methodology quality evaluation,the Meta-analysis was performed using Rev Man 5.3 software. RESULTS:12 RCTs involv-ing 1 732 patients were included. The results of Meta-analysis showed that the incidence of CIN in test group was significantly low-er than control group[RR=0.40,95%CI(0.30,0.53),P<0.001],the incidence of phlebitis was higher than control group [RR=10.18,95%CI(1.37,75.67),P=0.02] and there was no significant difference in the need rate of renal replacement between test group and control group[RR=0.44,95%CI(0.12,1.61),P=0.21]. CONCLUSIONS:Intravenous prostaglandin E1 combined with hydration can effectively reduce the incidence of CIN. Occurance of phlebitis should be paid attention to. Due to the limited quality and sample of included studies,it remains to be further verified by high-quality and large-sample RCT.
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Objective To study the correlation between amino terminal B-type natriuretic peptide precursor(NT-proBNP) and risk factors of acute coronary syndrome (ACS) with elder patients.Methods One hundred and twenty-eight ACS patients were divided into unstable angina pectoris (UAP) group with 52 samples,ST elevation myocardial infarction (STEMI) group with 35 samples and non-ST elevation myocardial infarction (NSTEMI) group with 41 samples.Meanwhile 45 healthy elder people were adopted as control group.Firstly,the subjects of blood pressure,body mass index (BMI) and smoking numbers were measured.Secondly,venous blood was collected to assay NT-proBNP,cardiac troponin Ⅰ (cTn Ⅰ),homocysteine (Hcy),blood-lipoids and C-reactive protein(CRP).Lastly,ultrasonic cardiogram was used to test left ventricular end diastolic diameter(LVEDD),left ventricular end systolic diameter (LVESD) and left ventricular ejection fraction (LVEF).In addition,correlation analysis was researched between NT-proBNP and other factors.Results NT-proBNP levels of UAP,STEMI and NSTEMI groups were significantly higher than the control group ((794.18±182.64) ng/L,(872.43±245.67) ng/L,(557.25±163.81) ng/L) and (125.84±59.27) ng/L,P ＜ 0.05).NT-proBNP was positive correlation with systolic blood pressure,diastolic blood pressure,Hcy and CRP (r=0.182,0.176,0.281,0.191;P=0.040,0.043,0.001,0.031),however negative with LVEF(r=-0.247,P =0.005).Conclusion NT-proBNP level is sensitive to monitor ACS variety,and it is significant to test NT-proBNP combining Hcy,CRP,and cTn Ⅰ for diagnosing and treating ACS.
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The Ebola virus belongs to the Filovirus family, which causes Ebola hemorrhagic fever (mortality, 25%-90%). An outbreak of infection by the Ebola virus is sweeping across West Africa, leading to high mortality and worldwide panic. The Ebola virus has caused a serious threat to public health, so intensive scientific studies have been carried out. Several vaccines (e.g., rVSV-ZEBOV, ChAd3-ZEBOV) have been put into clinical trials and antiviral drugs (e.g., TKM-Ebola, ZMAPP) have been administered in the emergency setting to patients infected by the Ebola virus. Here, recent advances in vaccines and drugs against the Ebola virus are reviewed.
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Animals , Humans , Antiviral Agents , Ebola Vaccines , Genetics , Allergy and Immunology , Ebolavirus , Genetics , Allergy and Immunology , Physiology , Hemorrhagic Fever, Ebola , Drug Therapy , VirologyABSTRACT
Objective To investigate the effect of tannic acid on glomerular mesangial cells (GMC),and to clarify the mechanism of tannic acid in improving the pathological changes of diabetic nephropathy (DN)from the aspect of oxidative stress and micro-inflammation. Methods The glomerular mesangial cells were treated with glucose (30 mmol·L-1 )or advanced glycosylation end-products (AGEs)bovine serum albumin(BSA)(250 mg·L-1 )and then different concentrations of tannic acid (10,20,40 and 80μmol·L-1 )were added into the GMC.The cells cultured by normal glucose or treated with BSA were used as control groups and then the level of malonic dialdehyde (MDA), glutathione peroxidase (GSH-Px ), superoxide Dismutase (SOD ), CAT (Catalase ) activities and 8-hydroxy-2′-deoxyguanosine(8-OHdG)levels in the culture supernatant 48 h after culture were determined by colorimetry and ELISA method. The expressions of intercellular cell adhesion molecule-1 (ICAM-1 ) protein, monocyte chemotactic protein 1 (MCP-1 ) and ICAM-1 mRNA in GMC were detected by immunohistochemical staining and RT-PCR method.Results Compared with high glucose and AGEs groups,the MDA levels in tannic acid groups were reduced significantly(P<0.05);the activities of GSH-Px,SOD and CAT were increased significantly(P<0.05 or P<0.01);the 8-OHdG levels in annic acid groups were significantly reduced (P<0.05). Compared with high glucose and AGEs groups,the expressions levels of ICAM-1 protein in 40 and 80μmol· L-1 tannic acid groups were decreased (P<0.05 ). The mRNA expressions levels of MCP-1 and ICAM-1 were significantly lower than those in high glucose group (P<0.01 ).Conclusion Tannic acid could protect GMC against the damage of oxidative and inflammatory mediators,thereby delaying and improving the glomerular lesions of DN.
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Objective To study the heart rate variability and arrhythmia characteristics in the elderly patients with unstable angina and negative psychology and to observe the changes before and after treatment. Methods Eighty patients aged ≥ 65 years with unstable angina were recruited in the study, and divided into two groups according to the determination of Hospital Anxiety and Depression Scale: 36 patients in the negative psychology group( NP group) and 44 in the non-negative psychology group ( non-NP group). All patients were monitored by Holter. Results The SDNN, SDANN, SDNNidex, rMSSD and PNN50 in the NP group were (86.8 ±14.1 ) ms, (78.1 ± 11.2 ) ms, (22.9 ± 4.5 ) ms, ( 6.3 ± 1.2 ) % and (40.3 ± 16.4) ms, respectively, which were significantly decreased compared to that in the non-NP group [ ( 138.9 ± 37.1 ) ms, ( 123.3 ± 32.5 ) ms, (25.7 ±12.3)ms,(9.2 ±5.3)% and (47.8 ± 10.7)ms,respectively] (t =4.20,2.52,2.32,2.28 and 2.20,Ps ＜0.05)The prevalence of ventricular arrhythmia, sinus tachycardia, ischemic ST-T changes and heart rate variability (HRV) (55.56%, 13.89%, 33. 33% and 52. 78%, respectively) significantly increased in the NP group,compared to those in the non-NP group(9.09% ,2.27% ,6.82%, 18.18% ,respectively) ( χ2 = 16.89,4.18,4.33 and 4.99, respectively, Ps ＜ 0.05 ). After treatment with Prozac ( fluoxetine hydrochloride scientific name), SDNN,SDANN,rMSSD,PNN50,SDNNindex significantly increased from (84.7 ± 34.0) ms, (79.2 ± 39.6) ms, (23.4 ±7.5)ms,(5.1 ±2.1)% and (38.1 ± 11.8)ms to (102. 1 ±29.6)ms,(94.2 ±26.7)ms,(35.6 ± 10.2)ms,(9.9 ± 7.5 ) % and (63.3 ± 13.8 ) ms ( t = 3.60,2.43,2.34,2.26 and 2.30, P ＜ 0.05 ). After treatment,ventricular arrhythmia,sinus tachycardia,ischemic ST-T changes and HRV significantly decreased compared to that before treatment in the NP group (χ2 = 5.58,4.33,4.24 and 4.06 ,P ＜ 0. 05 ). Conclusions In patients of coronary heart disease with unstable angina and negative psychologically , HRV decreased , and they are prone to ventricular arrhythmias,sinus tachycardia and ischemic ST-T changes. Treatment with Prozac could decrease arrhythmia and improve cardiac ischemia arrhythmias, sinus tachycardia and ischemic ST-T changes. Treatment with Prozac could decrease arrhythmia and improve cardiac ischemia.
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Using the experiences of domestic and other countries on rehabilitation nursing of patients with femoroacetabalar impingement for reference,a balanced rehabilitation procedure was designed and implemented on 16 patients underwent arthroscopic bone forming surgery in acetabulum and femoral head and neck junction.The patients could master the correct metheds of functional exercises.As a result,no postoperative complications occurred.The score of modified Harris hip rating was increased from 62.4 points before surgery to 92.5 points at six months after surgery.
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Objective:To investigate the protective effects of Compound Danshen Injection and Benazepril on rats with obstructive nephrosis.Methods:The interstitial nephritis model of rat was established by ligating unilateral ureter. The model rats were given drug Compound Danshen Injection and Benazepril, respectively. The levels of angiotensin Ⅱ (Ang Ⅱ), endothelin (ET 1) and the activity of angiotensin converting enzyme (ACE) in renal tissues were measured. Results: The level of angiotensin Ⅱ of Compound Danshen Injection group was 42.03?13.95pg/mg lower that of pathologic group (80.19?27.31pg/mg). The level of Benazepril group was 32.53?8.07pg/mg. There were significant differences among them. The measuring results of ACE and ET 1 were similiar to that of Ang Ⅱ.Conclusion: Compound Danshen Injection and Benazepril can effectively inhibit the activity of ACE and decrease the levels of Ang Ⅱ and ET 1.