Investigation on T-lymphocyte subsets absolute counting and CD4+/CD8+ratio in healthy adults of Ugyur and Han nationalities in Karamy / 国际检验医学杂志

Objective To built the reference range of peripheral blood T-lymphocyte subsets including CD3+ ,CD4+ ,CD8+ and CD4+ /CD8+ ratio in healthy adults of Ugyur and Han nationalities and to provide basis for the diagnosis ,therapy and prognosis of disease .Methods A total of 181 blood samples were collected from healthy adults .The cell chip quantitative detection technology was used to detect CD3+ ,CD4+ and CD8+ ,CD3+ ,CD4+ absolute value ,CD8+ and CD4+ /CD8+ ratio were compared between Ugyur and Han nationalities .Results CD8+ absolute counting and CD4+ /CD8+ ratio had no significant difference between Ugyur and Han nationalities(P>0 .05) ,while the CD3+ ,CD4+ absolute counting had significant difference(P<0 .05) .Conclusion The discrepancy of territory and living environment should be taken into account for building a reference values of CD4+ .

The significance of protein SP70 detection for differentiating benign and malignant pleural effusion / 中华检验医学杂志

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.

A preliminary study on serum protein SP70 as a novel biomarker for the detection of non-small cell lung cancer / 中华检验医学杂志

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.

Effect of carvedilol on mitochondrial respiratory function of pressure overload induced left ventricular hypertrophy in rats and its mechanism / 医学研究生学报

Objective: To understand the effect of Carvedilol on mitochondrial oxidative phosphorylation function during the development of pressure overload induced left ventricular hypertrophy in rats and its mechanism.Methods: Male SD rats were randomized into 6 groups: 5-and 15-week coarctation of the abdominal aorta(H5,H15),5-and 15-week Carvedilol intervention(HR5,HR15) and 5-and 15-week sham operation(S5,S15).Hemodynamics and ventricular remodeling parameters were measured,and the mitochondrial respiratory function was detected by Clark oxygen electrode.Results: Compared with S5,mitochondrial state 3 and 4 respiration and the oxidative phosphorylation rate(OPR) were increased and the respiratory control rate(RCR) decreased significantly in the H5 group.In comparison with S15,state 3 respiration,OPR and RCR were reduced significantly in the H15group.Carvedilol increased the three parameters and restored them to the level of the S15.Conclusion: Mitochondrial respiratory function decreased during the development of pressure overload induced left ventricular hypertrophy in rats.Carvedilol could protect mitochondrial respiratory function and improve myocardial energy metabolism,which might be a mechanism underlying its protective effect on myocardium.

Roles of NF-?B activation and TNF-? expression in heart failure following myocardial infarction in rats / 第三军医大学学报

Objective To investigate the effects of nuclear factor ?B (NF ?B) activation and tumor necrosis factor ?(TNF ?) expression on the progressive heart failure following myocardial infarction in rats. Methods Male rats were randomized for the proximal left anterior descending branch coronary artery ligation and then killed at 4, 8 and 12 weeks after ligation for the examination of hemodynamic parameters, ventricular mass index, protein expression of TNF ?, and NF ?B activity. Sham operated rats were used as the control group. Results Compared with the sham operated group, the myocardial infarction rats showed significant decreases in mean arterial pressure(MAP), maximal ascending and descending velocity of the left ventricular pressure(?dp/dt max ) and a significant increase in left ventricular end diastolic pressure(LVEDP) ( P

Effects of antihypertensive agent on cardiac hypertrophy in hypertensive rats induced by high salt diet combined with cold stress / 第三军医大学学报

Objective To observe the effects of antihypertensive agents on renin angiotensin aldosterone system, blood pressure and myocardial hypertrophy induced by high salt diet plus cold stress. Methods Fifty male Wistar rats weighting 200～250 g were divided into 5 groups: control, saline, captopril, betaloc and nitrendipine. The rats treated with dugs or saline were fed with high salt diet(8% NaCl) and subjected to cold stress 4 hours a day. Blood pressure and body weight were measured once a week. Rats were sacrificed and then the gross weight of hearts was measured 8 weeks later. Renin activity(RA), angiotensinⅡ(AngⅡ) and aldosterone(Aldo) in the left ventricular wall were determined by radioimmunoassay. Results ① Levels of RA, AngⅡ and Aldo of rat left ventricular wall in betaloc group were significantly lower than those in saline, captopril and nitrendipine groups( P

Change of expression of cell/organs defense genes in brain tissue of rats with stroke-like episodes induced by complex environmental factors / 中华医学遗传学杂志

<p><b>OBJECTIVE</b>To investigate the effect of environmental risk factors on the development of stroke.</p><p><b>METHODS</b>With the use of cold-stimuli plus high-salt intake as environmental risk factors, a hypertension model with the complication of stroke was established in rats, then, a new technique, suppression subtractive hybridization (SSH), was used to identify the differential genes which specifically expressed in total cerebrum tissue of rat in each group. Comparison was made between control group and stroke group.</p><p><b>RESULTS</b>By the application of SSH, a total of 576 clones were generated in this study from two subtractive libraries, among them 456 clones were usable and were analyzed. Genes for cell/organs defense were down-regulated in stroke group and metabolism transcripts were shown to be up-regulated (P<0.01).</p><p><b>CONCLUSION</b>Cell/organs defense genes may play important roles in the development of stroke. The above findings suggested that environmental risk factors could genetically alter individual sensitivity to stroke.</p>

Effect of vascular endothelial growth factor on apoptosis of endothelial cells induced by hypoxia / 第三军医大学学报

Objective　To explore the effect of hypoxia on the apoptosis of cultured human umbilical vein endothelial cells（HUVECs） and the role of vascular endothelial growth factor（VEGF） in inhibition of apoptosis． Methods　①Culture and identification of HUVECs．②Establishment of hypoxic model（0，12，24，48 h）in HUVECs．③Incubation of HUVECs with VEGF(0 ng, 100 ng) under hypoxic condition for 24 h. ④Detection of apoptosis of HUVECs with TUNEL method． Results　The percentages of apoptosis were different under different hypoxic conditions． The longer hypoxic time was，the higher apoptosis percentage was．VEGF reduced the apoptosis of HUVECs induced by hepoxia． Conclusion　Over-apoptosis EVCs in one of the important factors for the impairment of endothelial function. HEGF inhibits the apoptosis of HVCs and having a pretive function on them.

Role of transfected angiotensinⅡ receptor anti-sense nucleotide in the growth of cardiomyocytes / 第三军医大学学报

Objective　To evaluate the role of transfected angiotensinⅡ(Ang Ⅱ) receptor AT1 anti-sense nucleotide (AT1A) in the expression of subtypes of AngⅡ receptor mRNA, synthesis of protein and nucleic acid in cardiomyocytes. Methods　AT1 cDNA sequence (476 bp) was cloned with RT-PCR and reversely inserted into PcDNA3.1 (5.4 kb) to construct an intact plasmid containing AT1A (PAT1A). The plasmid was then transfected into the cultured cardiomyocytes and identified with RT-PCR and Western blot. The synthesis of protein and nucleic acid identified by 3H-Leu and 3H-TdR incorporation, and expressions of AT1 and AT2 mRNA by RT-PCR, were compared between transfected and nontransfected cardiomyocytes after being stimulated with 10-7 mol/L AngⅡ for 24 h. Results　The plasmid PAT1A were successfully constructed. The AT1 mRNA and its protein were expressed significantly less in the transfected cardiomyocytes than in the control (P<0.01). In the transfected cardiomyocytes, AT1 mRNA expression was markedly decreased, but that of AT2 mRNA obviously increased (P<0.01) when compared with the nontransfected cardiomyocytes after stimulation for 24 h with AngⅡ 10-7 mol/L; no significant difference was found in 3H-Leu and 3H-TdR incorporation between them. Conclusion　After the cardiomyocytes was tranfected with AT1A, the expression of AT1 mRNA was markedly suppressed，while AT2 mRNA up-regulated at the same time. Our results indicate that AT1A blocking can not effectively interrupt the Ang Ⅱ-induced synthesis of the protein and nucleic acid in cardiomyocytes.

Preliminary analysis on specific expressed genes in brain tissue of rats with stroke-like episodes induced by complex environmental factors / 中华神经科杂志

Objective To investigate the stroke caused by a combination of genetic and environmental factors Though epidemiological studies have provided evidence of genetic influence on the occurrence of human stroke,however,the role of environmental risk factors to the development of stroke is still not well known. Methods Using cold stimuli plus high salt intake as environmental risk factors, we established a hypertension model in rats, for producing a complicated stroke, then, applied a new technique, suppression subtractive hybridization(SSH),to identify the differential genes which were specifically expressed in total rat cerebrum tissues in between two populations, namely the control and the stroke groups. Results Using this SSH approach, totally 288 clones were generated in our study from a subtractive libraries, among them,226 clones were usable and analyzed The average length of this group is (286 6?120 3) bp Among those clones, 126 clones represented sequences with significant identity to the known genes, 78 were matched to existing ESTs in dbEST but not to any known gene sequences, and the remaining 22 were novel transcripts exhibiting no similarity to any known sequences Mitochondrial transcripts were observed at a high rate of 26 5% Mitochondrial genes may play important roles in causes and effects of stroke. Conclusions Our investigation suggests that environmental risk factors may induce an increased sensitivity to stroke through genetic influence Also we will identify the genes responsible for stroke in this rat model

Express of vascular endothelial growth factor in rat myocardium with AMI and the significance and effect of ecdysterone / 中国介入心脏病学杂志

Objective To determine the relationship and significance between the acute ischemia, hypoxia and the production of VEGF in rat myocardium and the influence of EDS on expression of VEGF protein in myocardium Methods To establish the model of AMI in rats, Wistar rats were randomly divided into control group, AMI group (1,3,7 day) and EDS group (0, 40 mg/day) Myocardial enzymes, VEGF protein, microvascular density and infarct size were detected Rat cardiac myocytes cultured primarily received EDS 100 ?g/ml in normal and hypoxia condition After 24 hours, VEGF was detected with immunohistochemical technique Results The production of VEGF was higher with ischemia and hypoxia time, the positive relationship was found between the time of AMI and the production of VEGF EDS reduced the concentration of serum myocardial enzymes (CK MB), enhanced the formation of collateral circulation,microvascular density and cardiac function; decreased infarct size In addition, EDS could enhance expression of VEGF protein in cardiac myocytes of rat in normal and hypoxia condition Conclusion Acute ischemia strongly stimulated the production of VEGF in myocardium, which played an important role for autoprotection of ischemic myocardium EDS could promote the establishment of cardiac collateral circulation and enhance microvascular density in infarct zone by upregulation of VEGF protein expression

Role of tyrosine protein kinase in proliferation and hypertrophy in vascular smooth muscle cells of spontaneously hypertension rats / 中国病理生理杂志

AIM: To explore the relationship between proliferation, hypertrophy of vascular smooth muscle cells(VSMC) and platelet-derived growth factor-AA(PDGF-AA) and PDGFR-? expression in spontaneously hypertension rats(SHRs) and the role of tyrosine protein kinase (PTK) in it. METHODS: 1. The difference of PDGF-AA, PDGFR-? and PDGFR-? expressions in SHR/Wistar-kyoto rat(WKY)-VSMC was examined by Western blot. 2.The effect of PTK inhibitor (genistein) on proliferation and hypertrophy of SHR-VSMC induced by PDGF-AA was observed by Western blot and incorporation. RESULTS: 1.PDGF-AA and PDGFR-? expression markedly increased in SHR-VSMC compared with WKY-VSMC. There was no difference in PDGFR-? expression levels between SHR and WKY-VSMC. 2.Dose-dependent PDGF-AA-stimulated PCNA expression and incorporation were observed in SHR-VSMC. 3. Genistein inhibited PCNA expression and incorporation induced by PDGF-AA in a dose-dependent manner in SHR-VSMC. CONCLUSIONS: Spontaneous increasing expression of PDGF-AA and PDGFR-? in spontaneously hypertension rats(SHRs) may be one of the important factors in vascular reactivity and vascular modeling mediated through proliferation and hypertrophy in SHR-VSMC. Tyrosine protein kinase plays an important role in this process.

Effect of ecdysterone on apoptosis induced by hypoxia in HUVECs / 中国药理学通报

AIM To explore the effect of hypoxia on apoptosis in human umbilical vein endothelial cells(HUVECs) and the role of ecdysterone(EDS)in inhibition of apoptosis. METHODS ① Culture and identification of HUVECs;② Hypoxic model(0,12,24,48 h) in HUVECs was established. While HUVECs was incubated 24 h with EDS(100 mg?L -1 ) under hypoxic condition. Apoptosis in HUVECs was detected by TUNEL;③ HUVECs received EDS 100 mg?L -1 in normal and hypoxic condition. After 24 h, vascular endothelial growth factor (VEGF) was detected with immunohistochemical technique. RESULTS The apoptosis percentages are different under different hypoxic condition. The longer hypotic the time was, the higher the apoptosis percentage was. EDS reduced apoptosis of HUVECs. EDS could enhance expression of VEGF protein in cardiac myocytes of rat in normal and hypoxic condition. CONCLUSION The role of hypoxia in HUVECs apoptosis is more significant along with prolonging of hypoxic time. VEGF play an important role in protective effect of EDS on endothelial cell apoptosis.

Echocardiographic Observation on 48 Cases of Repaired Atrial septum secundum Defect / 第三军医大学学报

Forty-eight cases of atrial septum secundum defect were repaired and followed up with M-mode echocardiography postoperatively for three months to three yaers respectively.All the cases showed a significant reduction of the inner diameter of the right ventricle after operation,and in 23% of the cases, the inner diameter even returned to the normal range. In 92% of the acses, the intervetricular septal paradoxical motion resumed the normal pattern. In most cases, the inner diameter of the left ventricle increased markedly.In 11 cases with repeated follow-up studies, it was found that three months after operation, the interventricular septal paradoxical motion became normal in 7 cases and the motion flattened in three cases. In 18 cases with a 3-year follow-up history, it was found that the recovery of the heart condition showed no relation to the age of the patient. This is likely to suggest that the age factor exerts no influence on the postoperative recovery of the cases having the atrial septal defect repaired.

Preoperative Evaluation of Mitral Vaive pathologywith Two-dimensional Echocardiography-An Analysis of 50 Cases / 第三军医大学学报

Fifty cases with chronic rheumatic valvular disease were examined with two dimensional echocardiography to evaluate the valvular pathology preoperatively. The echocardiographic findings were correlated and compared with the operative findings.It was found that 89% of the thickening pattern cases and 75% of the funnel-shaped cases showed thickening of the leaf-lets- All the 28 membranous cases showed diastolic doming and restricted tip motion of the anterior leaflet in different degrees. In the 4 funnel-shaped cases, 3 showed restricted tip and body motion of the leaflets and the 4th case showed stiffness of the leaflet base. 63% of the mitral regurgitation cases were confirmed at operation.It is concluded that preoperative evaluation of the valvular pathology with two dimensional echocardiography is helpful in selection of suitable operative candidates.

IMPACTS OF HIGH SALT INTAKE PLUS COLD STRESS ON CARDIAC RENIN-ANGIOTENSIN-ALDOSTERONE SYSTEM IN RATS / 解放军医学杂志

To study the effects of high salt intake together with cold stress on rat cardiac renin angiotensin aldosterone system (RAAS) in rats. Male Wistar rats were randomly divided into four groups: control, high salt (8%NaCl), cold stress (5 2℃) and compound group (8%NaCl+cold stress). Blood pressure and body weight were measured once a week. The experiment ran for 8 weeks. Renin activity (RA), angiotensinⅡ (AngⅡ), and aldosterone (Aldo) in plasma and left ventricle were determined with radioimmunoassay. Angiotensin II receptor mRNA was determined with RT PCR. The results showed that ①Rats in compound group had higher blood pressure than rats in the other three groups ( P