This study was aimed to observe the effect ofJia-Shen prescription (JSP) on angiotensinⅡ (AngⅡ) inhibition, ventricular remodeling in myocardial infarction (MI) rat model. The anterior descending coronary artery of Sprague-Dawley rat was ligated to establish the MI rat model. Rats were randomly divided into the 3 g JSP group, 6 g JSP group, losartan group, model group, and the sham-operation group. Intragastric administration of medication was given 24 h after MI. In the 3 g and 6 g JSP group, JSP was given at the dose of 3 g·kg-1·day-1 and 6 g·kg-1day-1, respectively. Losartan was given at the dose of 10 mg·kg-1·day-1 in the losartan group. Same volume of distilled water was given to the sham-operation and model group. Four weeks later, the left ventricular end-systolic diameter (LVESD), left ventricular end-diastolic diameter (LVEDD), posterior wall thickness (PWT), left ventricular ejection fraction (LVEF), left ventricular fractional shorten (LVFS), left ventricular weight index (LVWI), the distribution and content of collagen, plasma brain natriuretic peptide (BNP) and the AngⅡ content in myocardial tissues homogenate were observed. The results showed that 4 weeks after MI, compared to the model group, 6 g PJP reduced myocardial infarct size, LVWI, LVEDD and LVESD, and enhanced LVEF and LVFS (P< 0.05). In ischemic regions, compared to the model group, JSP can obviously reduce the content of collagen (P < 0.05). This effect had dose-dependent relationship. Plasma BNP and AngⅡ content in myocardial tissues homogenate were also obviously lower than the model group (P< 0.05). It was concluded that JSP can improve the ventricular remodeling of MI rat model. Its action mechanism may be through the AngⅡ inhibition, in order to improve the early stage left ventricular morphological remodeling, myocardial fibrosis and cardiac contractile function.

This study was aimed to explore the method to improve the purity of primary myocardial cells from neonatal rats. The myocardial tissues of rats which were born 1-3 days were repeated digested by 0.08% myocardial cells digestive juices. And then, cells were neutralized with DMEM medium which containing 10% fetal bovine serum. The cells were separated with differential sidewall ion. The red blood cell cracking liquid was added to remove the red blood cells. Bromine deoxidization uracil (Brdu) was added to purify the myocardial cells. Then, cells were incubated in the CO2 incubator for two days. The serum-free synchronization was performed for one day. The results showed that the output of myocardial cells from one rat was about 1.2 × 106. The dynamic myocardial cells occupied more than 90%. The purity of myocardial cells was more than 90%. After 3 to 4 days, the cell fusion of myocardial cells was formed with spontaneous rhythm beats. It was concluded that the method can ensure the yield and the activity of the myocardial cells. At the same time, the purity of myocardial cells can also be improved greatly.

This article was aimed to determine effects of Jia-Shen prescription (JSP) on infarct size (IS), cardiac function and myocardial cytokine in the early phase of myocardial infarction (MI) in rats. Acute MI models were induced by the ligation of left anterior descending coronary artery in Sprague-Dawley (SD) rats. The rats were ran-domly divided into five groups, which were the sham-operated group, model group, JSP-3 g (3 g·kg-1·day-1) group, JSP-6 g (6 g·kg-1·day-1) group, and the losartan (10 mg·kg-1·day-1) group. IS was determined by Evans blue and 2,3,5-Triphenyltetrazolium chloride (TTC) 3 days after MI. The left ventricular structure and contractility were measured by echocardiography performed 7 days after MI. And contents of myocardial inflammatory mediators in-cluding tumor necrosis factor-α(TNF-α), interleukin-1β(IL-1β), and monocyte chemoattractant protein-1 (MCP-1) were measured by ELISA. The results showed that compared with the model group, treatment with JSP at the dose of 6 g significantly reduced myocardial IS (P<0.05);left ventricular end diastolic diameter (LVEDD) and left ventricu-lar end systolic diameter (LVESD) were significantly decreased (P<0.05); left ventricular ejection fraction (LVEF) and left ventricular fraction shortening (LVFS) were significantly increased (P<0.05).The results were similar as the losartan group. Compared with the model group, JSP can significantly reduce the production of TNF-α, IL-1βand MCP-1 in cardiac tissues (P<0.05). Except TNF-α, these effects of JSP were in a dose-dependent manner. JSP (6 g) had equal effectiveness with losartan. It was concluded that consistent with losartan-induced cardioprotection, JSP administered after MI reduced myocardial IS, improved cardiac function, and decreased inflammatory mediators in ischemic myocardium. The data indicated that JSP exerted its cardioprotection possibly via inhibiting inflammatory response.

Objective To explore the influence of the clinical pathway to control on hospital stay and medical expenses of pediatric rotavirus enteritis.Methods 245 infants with IRE were randomly assigned into two groups,109 in research group,136 in control group.All were treated with conventional therapy,for research group with clinical pathway.136 patients with previous medical routine therapy patients in the control group were compared.Compared two sets of average day in hospital,cure rate and cost,expenses for medicine and checking expenses proportion.Results The results shwed that the observation group of children's average hospital stay was lower than the control group,the cure rate higher than that in the control group,each time of total cost,expenses for medicine,each day medicine reducing( P ＜ 0.05 ).Checking expenses proportion was increased ( P ＜ 0.05),as to therapeutic effect,there was significant difference between two groups( P ＜ 0.05 ).Both expenses of drug ratio and ratio of the average daily expenses of drug are reduced.Conclusion Clinical pathway is applied in pediatric rotavirus enteritis can improve recovery rate,reduce hospitalization time and lower hospitalization fees and expenses,charges,medicine and inspection charge proportion.And can improve health education effect and patient satisfaction.

Objective:To study the signal enhancement of lung adenocarcinoma nude mice after injection of immunomagnetic bead solution (magnetic beads conjugated with monoclonal antibody NJ001) in micro-CT scan. Methods:The models of lung adenocarcino-ma nude mice were established by injecting SPC-A1-luc cells through the tail vein and were validated by bioluminescence imaging (BLI). The nude mice were divided into three groups: physiological saline group, bare magnetic bead group, and immunomagnetic bead group. Three groups of nude mice were injected with physiological saline, 750 nm bare magnetic bead solution, and immuno-magnetic bead solution via the tail vein every week, and micro-CT scan was taken before and 4 h after injection. Immunohistochemis-try (IHC) was used to detect the expression of antigen SP70 in tumor tissues. Results:The tumor was detected in the immunomagnetic bead group at the fourth week, whereas in the physiological saline and bare magnetic bead groups, the tumor was undetectable until the sixth week. The tumor intensities detected at the sixth week by micro-CT scan in the physiological saline, bare magnetic bead, and immunomagnetic bead groups were 59.05 ± 0.66, 60.69 ± 0.55, and 58.25 ± 0.32 before injection and 60.30 ± 1.83, 61.05 ± 0.68, and 67.41±3.82 after injection, respectively. Compared with the tumor intensities before injection, they significantly increased after injec-tion in the immunomagnetic bead group;the difference was statistically significant (P=0.0079). By contrast, no statistical significance was observed in the tumor intensities before and after injection in the physiological saline and bare magnetic bead groups (P=0.1867 and P=0.3839, respectively). Conclusion:The immunomagnetic beads had enhanced effect on micro-CT scan of lung adenocarcinoma nude mouse models.

Objective To evaluate whether the protein SP70 could be used as a serum biomarker for the diagnosis of non-small cell lung cancer (NSCLC).Methods Polyclonal antibody was prepared by immunizing New Zealand rabbit with SPC-A1 cells.Sandwich ELISA was carried out by using newly-prepared polyclonal antibody(PcMb) coating assay plates,monoclonal antibody (McAb) NJ001 and HRP goat antimouse antibody as primary antibody and labeling antibody respectively.After optimizing the experiment conditions,serum from 175 lung cancer patients [ 80 NSCLC adenocarcinoma,70 NSCLC squamous carcinoma and 25 small cell lung cancer ( SCLC) ],25 benign lung disease ( BLD) patients and 300 healthy controls (HC) were examined.CEA,NSE,CYFRA21-1 were measured by ECLIA for comparison.Results Positive rates of NSCLC adenocarcinoma,NSCLC squamous carcinoma,SCLC and BLD were 68.8％,51.4％,16.0％ and 12.0％ respectively,obviously higher than that of HC (7.3％).NSCLC (adenocarcinoma,Squamous carcinoma) had significantly higher positive rate than SCLC (60.7％ υs 16.0％,x2 =17.23,P＜0.05)and BLD(60.7％ υs 12.0％,x2 =20.41,P ＜0.05).Among 68 NSCLC patients who had definite staging,positive rates at early stage ( Ⅰ/Ⅱ,n=30) reached up to 76.7％.Meanwhile,positive rates of CEA,NSE and CYFRA21-1 (32.7％,18.0％ and 37.3％) were significantly lower than the targeting antigen to McAb NJ001 in NSCLC(60.7％ υs 32.7％,x2 =23.63,P ＜0.05;60.7％υs18.0％,x2 =57.22,P＜0.05;60.7％ υs37.3％,x2=16.34,P＜0.05).Conclusions It showed high positive rates of SP70 in the serum of NSCLC patients,which suggested thai SP70 might be a potential valuable biomarker for the diagnosis of NSCLC.

Objective To investigate the diagnostic value of detection of protein SP70 in differentiating benign and malignant pleural effusion.Methods A case-control study was conducted from July 2011 to February 2012.108 cases of pleural effusion from patients with clinically proven lung cancers and 122 cases of benign pleural effusion were collected.SP70 was detected by Sandwich ELISA,while CEA,CYFRA21-1,NSE were measured by electrochemiluminescence immunoassay for comparison.Meanwhile,protein SP70 on exfoliated cells in pleural effusion was detected by direct immunofluorescence,and was compared with the results of HE staining.The differences between the groups were evaluated by the chisquare test Fisher' s exact test.Results Positive rates of SP70,CEA,CYFRA21-1,NSE were 72.2％,58.3％,52.8％ and 30.6％ in malignant pleural effusion,obviously higher than benign pleural effusio (9.8％,13.1％,23.0％ and 19.7％).The specificity of SP70,CEA,CYFRA21-1,NSE were 90.2％,86.9％,77.0％ and 80.3％,NSCLC had significantly higher positive rate than SCLC(74.3％ ＞0.0％,P =0.02 ＜ 0.05),detection of protein SP70 in malignant pleural effusion had significantly higher coincidence rate than HE staining(72.2％ vs 47.2％,x2 =14.03,P ＜ 0.05).Conclusion Determination of the protein SP70 in pleural effusion and in exfoliated cells,can improve the sensitivity and specificity of the diagnosis of malignant pleural effusion.

OBJECTIVETo explore clinical value of circular DNA in acute myocardial infarction.

METHODSVenous blood (2 ml/head) of 40 healthy control and 40 patients with acute myocardial infarction within 48h of onset of illness and convalescent period was collected. The level of plasma circular DNA was detected by duplex real-time polymerase chain reaction assay. The levels of myocardial enzyme spectrum and cardiac troponin T (cTnT) were detected by biochemistry method.

RESULTSThe level of circular DNA in control group and group of acute myocardial infarction before treatment was (21.5 +/- 10.7) ng/ml and (253.6 +/- 45.7) ng/ml, respectively (P = 0.000). The levels of serum myocardial enzyme spectrum and cTnT before treatment in patients with acute myocardial infarction were significantly higher than those of control group (P < 0.05). The level of circular DNA after treatment in patients with acute myocardial infarction was significantly decreased compared with that before treatment (P = 0.000), the levels of myocardial enzyme spectrum and cTnT were also significantly reduced (P < 0.05). There was significant correlation between the level of circular DNA and those of CK-MB and cTnT, r = 0.613, 0.654, P = 0.032, 0.021.

CONCLUSIONCircular DNA can be used as a marker of sensitively reflecting myocardial cell injury.

Aged ; Case-Control Studies ; DNA, Circular ; blood ; Female ; Humans ; Male ; Middle Aged ; Myocardial Infarction ; blood ; diagnosis

Objective This study was designed to determine the effect of transient receptor potential vanilloid type 4(TRPV4)on angiotensin Ⅱ(Ang Ⅱ)-induced renal injury in TRPV4-null mutant(TRPV4 -/-)mice. Methods The mice were divided into sham group and Ang Ⅱ-treated group. Ang Ⅱ was infused systemically into wild type(WT)and TRPV4 -/- mice via a miniosmotic pump for 4 weeks, and the sham mice were given with normal saline. Systolic blood pressure,urinary excretion of albumin and 8-isoprostane, serum creatinine, and the pathological changes in the kidney tissues were assayed after the 4-week treatment. Results Compared with corresponding sham mice,Ang Ⅱ infusion led to enhanced systolic blood pressure,increased urinary excretion of albumin and 8-isoprostane,increased serum creatinine(P< 0.05),and enhanced glomerulosclerosis degree and renal tubulointerstitial injury index(P< 0.05)in the WT and TRPV4 -/- mice. The result were associated with enhanced collagen levels in the kidney(P< 0.05). All of them were attenuated by the deletion of TRPV4 in the absence of alteration in blood pressure(P< 0.05). Conclusions Deletion of TRPV4 could alleviate renal injury during Ang Ⅱ-induced hypertension, suggesting that TRPV4 may contribute to the pathophysiology of angiotensin Ⅱ-induced renal injury.

Objective:To investigate the clinical value of spherical lens with 0.05 D intervals in optometry for small incision lenticule extraction (SMILE) in myopic eyes.Methods:A randomized controlled clinical study was conducted.Sixty patients (120 eyes) with low to moderate myopia and myopic astigmatism who underwent SMILE in the 989th Hospital of the PLA from June 2021 to February 2022 were enrolled.The patients were randomly divided into 0.05 D interval group (optometry with spherical lens at 0.05 D interval) and 0.25 D interval group (optometry with spherical lens at 0.25 D interval), with 30 cases (60 eyes) in each group.There was no significant difference in matched age, sphericity, cylindricity, and best corrected visual acuity (BCVA) (all at P>0.05). The preoperative monocular red-green balance, 1- and 3-month postoperative monocular red-green balance, uncorrected visual acuity and spherical equivalent of both groups were compared.This study adhered to the Declaration of Helsinki.The study protocol was approved by the Ethics Committee of the 989th Hospital of the PLA (No.WZLL-2021-034). Written informed consent was obtained from each subject before any medical examination. Results:The preoperative red-green balance rate in 0.05 D interval group was 95.00%(57/60), which was higher than 35.00%(21/60) in 0.25 D interval group, showing a statistically significant difference ( Wald χ2=17.642, P<0.001). The 1- and 3-month postoperative red-green balance rates in 0.05 D interval group were 63.33%(38/60) and 56.67%(34/60), which were higher than 23.33%(14/60) and 21.67%(13/60) in 0.25 D interval group respectively, showing statistically significant differences ( Wald χ2=9.137, P=0.003; Wald χ2=7.483, P=0.006). The 1- and 3-month postoperative visual acuity in 0.05 D interval group were -0.1(-0.1, -0.1) and -0.1(-0.1, -0.1), which were higher than 0.0(-0.1, 0.0) and -0.1(-0.1, 0.0) in 0.25 D interval group respectively, showing statistically significant differences ( Wald χ2=11.624, P=0.001; Wald χ2=12.841, P<0.001). The 1- and 3-month postoperative spherical equivalent were -0.07(-0.25, 0.13)D and -0.13(-0.25, 0.13)D in 0.05 D interval group, which were higher than -0.13(-0.38, 0.25)D and -0.13(-0.38, 0.25)D in 0.25 D interval group respectively, showing no statistically significant difference between the two groups ( Wald χ2=0.029, P=0.866; Wald χ2=0.189, P=0.664). Conclusions:Compared with spherical lens at 0.25 D interval, 0.05 D interval can improve the accuracy of preoperative and postoperative red-green balance rate and postoperative visual acuity in patients with low to moderate myopia who undergo SMILE.