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Bone marrow derived endothelial cells promote healing of acute intimal injury in carotid arteries of rabbits.

Li-Hua ZHU ; Hong JIANG ; Jing CHEN ; Bo CUI ; Dong-Dong ZHAO ; Xiao-Li JIAN

Chinese Journal of Cardiology.2007;35(5):480-483.

OBJECTIVETo investigate the effect of bone marrow derived endothelial cells implantation on healing of acute injured intima.

METHODSMononuclear cells derived from bone marrow were differentiated to endothelial cells. The cells were labeled with bromodeoxyuridine. Carotids injuring was induced by a balloon in 40 rabbits, endothelial cell suspension (2 x 10(6)/ml, n = 20) or PBS (2 ml, n = 20) was infused to injured arteries. The intima covered area was tested by Evan's Blue staining. The average intima thickness and media thickness were observed 7 and 14 days post procedure by histological assay. The immunofluorescent staining was performed for testing the BrdU labeled-cells, and these cells were detected under a fluorescent microscope.

RESULTSIntima covered area rate was significant higher (54.1% +/- 8.2% vs. 30.0% +/- 5.5% at day 7, and 81.8% +/- 6.0% vs. 63.6% +/- 8.4% at day 14, all P < 0.05) and the intima thickness and media thickness were significantly reduced in the endothelial cell suspension group.

CONCLUSIONThe bone marrow derived endothelial cell promoted healing post intima injury in this model compared to PBS group (all P < 0.05).

Animals ; Bone Marrow Cells ; cytology ; Bone Marrow Transplantation ; Carotid Arteries ; pathology ; Carotid Artery Injuries ; pathology ; surgery ; Endothelial Cells ; cytology ; pathology ; transplantation ; Female ; Male ; Rabbits ; Transplantation, Autologous

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Effects of metoprolol on cardiac function and myocyte calcium regulatory protein expressions in rabbits with experimental heart failure.

Cao ZOU ; Zhi-Hua LIU ; Bin JIANG ; Jian-Ping SONG ; Ting-Bo JIANG ; Xiang-Jun YANG ; Hong-Xia LI ; Lian-Hua HAN ; Bing-Yan LI ; Wen-Ping JIANG

Chinese Journal of Cardiology.2007;35(5):476-479.

OBJECTIVETo investigate the effects of metoprolol on cardiac function and myocyte calcium regulatory protein expressions in rabbits with heart failure.

METHODSRabbit heart failure model was established by aortic insufficiency induced volume overload followed 14 days later by pressure overload induced by abdominal aorta constricting (HF, n = 11), another 8 rabbits with heart failure were treated with metoprolol (ME) for 6 weeks, sham-operated rabbits (n = 11) served as control. Cardiac function was measured by echocardiography at the end of study. Caffeine-induced calcium transients of myocytes loaded by Fluo-3/AM were observed under Laser scanning confocal microscope. Calcium regulatory protein expression was determined by Western blot analysis.

RESULTSCompared to control animals, the ejection fractions [EF, (45.7 +/- 3.0)% vs. (72. 6 +/- 5.0)%, P < 0.01] and the amplitude of caffeine-induced calcium transients [(16.0 +/- 3.5) FI vs. (43.5 +/- 6.2) FI, P < 0.01] were significantly decreased while its time to peak was significantly prolonged [(129.8 +/- 14.5) s vs. (52.2 +/- 7.4) s, P < 0.01] in HF rabbits. The RyR2 (0.106 +/- 0.007 vs. 0.203 +/- 0.021, P < 0.01) and the ratio of SERCA2a and NCX (1.22 +/- 0.23 vs. 1.96 +/- 0.12, P < 0.01) were also significantly reduced in myocytes of HF rabbits. Metoprolol significantly attenuated the decrease of EF [(60.2 +/- 5.1)%], the amplitude of calcium transient [(32.8 +/- 5.4) FI], the RyR2 expression (0.164 +/- 0.016) and the ratio of SERCA2a and NCX (1.68 +/- 0.17, all P < 0.05 vs. HF rabbits) and attenuated the increase of the time to peak of caffeine-induced calcium transients [(91.4 +/- 10.9) s, P < 0.05 vs. HF rabbits].

CONCLUSIONMetoprolol could improve the cardiac function possibly by preventing the alterations of calcium regulatory proteins and increasing calcium transients in failing heart.

Animals ; Aortic Valve Insufficiency ; drug therapy ; metabolism ; Calcium ; metabolism ; Calcium-Binding Proteins ; metabolism ; Disease Models, Animal ; Heart Failure ; drug therapy ; metabolism ; Metoprolol ; pharmacology ; therapeutic use ; Myocytes, Cardiac ; drug effects ; metabolism ; Rabbits

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Effects of aldosterone on inducible nitric oxide synthase/nitric oxide pathway in aortic adventitia.

Ci-Ni DENG ; Lu-Hua SHEN ; Chao-Shu TANG ; Hong-Wei LI

Chinese Journal of Cardiology.2007;35(5):471-475.

OBJECTIVETo evaluate the effect and related mechanisms of aldosterone (ALD) on inducible nitric oxide synthase (iNOS) activity and nitric oxide (NO) production in aortic adventitia.

METHODSAortic adventitias from SD rats were incubated for 6 hours with various protocols: buffer alone (control), ALD (10(-8) mol/L - 10(-6) mol/L), ALD + spironolactone (10(-5) mol/L, ALD + SP), ALD + RU486 (10(-5) mol/L), LPS 10 ng/ml (LPS), ALD + LPS (10 ng/ml), ALD + LPS + SP (10(-5) mol/L), and ALD + LPS + RU486. Nitrate/nitrite (NOx), an index of NO production, was measured by Greiss Reaction. iNOS activity was determined by isotope-labeled L-arginine convertion rate.

RESULTS(1) NOx production and iNOS activity were similar between ALD and control groups (P > 0.05). NOx production was significantly reduced while iNOS activity remained unchanged in the ALD (10(-6) mol/L) + SP group compared to ALD (10(-6) mol/L) group. NOx production by 10(-7) mol/L and 10(-6) mol/L ALD increased by 50.0% and 58.7% respectively (P < 0.01) and iNOS activity was also significantly increased (P < 0.01) in ALD + RU486 group than that in ALD group. (2) LPS significantly increased the NOx production and iNOS activity (P < 0.01) and these effects were not augmented by adding ALD to LPS (P > 0.05) and SP significantly blocked and RU486 significantly enhanced the effects by LSP and ALD on NOx production and iNOS activity (P < 0.05).

CONCLUSIONAldosterone has a dual effect on iNOS/NO through mineralocorticoid receptor and glucocorticoid receptor pathway.

Aldosterone ; pharmacology ; Animals ; Aorta, Thoracic ; metabolism ; Cells, Cultured ; Connective Tissue ; metabolism ; Male ; Nitric Oxide ; metabolism ; Nitric Oxide Synthase Type II ; metabolism ; Rats ; Rats, Sprague-Dawley

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Effects of amiodarone on funny current I(f) channel gene expression in neonatal rat ventricular myocytes.

Hong-Xia LI ; Xiang-Jun YANG ; Lian-Hua HAN ; Ya-Feng ZHOU ; Xin ZHAO ; Bin JIANG ; Ning-Zheng DONG ; Jian-Ping SONG ; Zhi-Hua LIU ; Wen-Ping JIANG

Chinese Journal of Cardiology.2007;35(5):466-470.

OBJECTIVETo analysis the effect of amiodarone on funny current (I(f)) and hyperpolarization-activated cation channel (HCN) gene expressions of the neonatal rat ventricular myocytes.

METHODSVentricular myocytes of 1 - 3 days-old rats were isolated and cultured. The cardiomyocytes were treated by amiodarone (0.01, 0.1, 1, 10, 100 micromol/L) for 3 hours or amiodaron (10 micromol/L) for 0, 0.5, 1, 3, 6 hours. The I(f) and HCN 1 - 4 gene expressions were measured through the whole-cell configuration of the patch-clamp technique and real-time quantitative polymerase chain reaction (real-time PCR) using SYBR Green PCR kit.

RESULTS(1) HCN1, HCN2, HCN3 and HCN4 represented (0.23 +/- 0.01)%, (83.58 +/- 0.04)%, (0.79 +/- 0.01)% and (15.44 +/- 0.01)% of total HCN mRNA, respectively. (2) Amiodaron resulted in a dose-dependent I(f) [(3.1 +/- 0.9)%, (9.7 +/- 2.4)%, (36.7 +/- 5.8)%, (80.3 +/- 1.8)% and (85.9 +/- 3.1)%, respectively at -145 mV, IC(50) (1.32 +/- 0.28) micromol/L], HCN2 [(2.1 +/- 0.8)%, (8.9 +/- 3.6)%, (30.1 +/- 4.2)%, (78.3 +/- 3.6)% and (81.1 +/- 1.9)%, respectively] and HCN4 decrease [(0.5 +/- 0.2)%, (2.1 +/- 2.6)%, (8.8 +/- 3.2)%, (60.1 +/- 4.6)% and (59.6 +/- 6.5)%, respectively]. (3) Amiodaron (10 micromol/L) also induced a time-dependent I(f) [(1.1 +/- 0.1)%, (12.6 +/- 2.3)%, (80.6 +/- 2.2)% and (80.1 +/- 2.1)%, respectively], HCN2 [(1.0 +/- 0.1)%, (9.8 +/- 3.9)%, (82.9 +/- 4.6)% and (83.9 +/- 1.7)%, respectively] and HCN4 decrease [(0.1 +/- 0.1)%, (1.9 +/- 1.1)%, (59.4 +/- 7.8)% and (60.9 +/- 3.1)%, respectively]. However, HCN1 and HCN3 expressions were not affected by amiodaron treatment.

CONCLUSIONCurrent density of I(f) and the expression of HCN2 and HCN4 were decreased by amiodaron which might be the possible antiarrhythmic working mechanisms of amiodaron.

Amiodarone ; pharmacology ; Animals ; Animals, Newborn ; Cells, Cultured ; Cyclic Nucleotide-Gated Cation Channels ; genetics ; metabolism ; Female ; Gene Expression ; Heart Ventricles ; metabolism ; Hyperpolarization-Activated Cyclic Nucleotide-Gated Channels ; Male ; Myocytes, Cardiac ; drug effects ; metabolism ; Patch-Clamp Techniques ; Potassium Channels ; genetics ; metabolism ; Rats ; Rats, Sprague-Dawley

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Pulmonary hypertension caused by Sjogren's Syndrome: a case report.

Fang ZHU ; Chong-Xin DENG ; Zhan-Quan LI

Chinese Journal of Cardiology.2007;35(5):465-465.

Female ; Humans ; Hypertension, Pulmonary ; etiology ; Middle Aged ; Sjogren's Syndrome ; complications

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Diver CE versus Guardwire Plus for thrombectomy during primary angioplasty for inferior myocardial infarction.

Nan LI ; Hong-Bing YAN ; Xiao-Ling ZHU ; Hai GAO ; Hui AI ; Jian WANG ; Xiang LI ; Ming YE ; Yun-Peng CHI ; Hong ZHANG

Chinese Journal of Cardiology.2007;35(5):461-465.

OBJECTIVEIn this randomized prospective single-center study, we compared the efficacy of adjunctive thrombectomy using Diver CE device (Linvatec, Italy) versus Guardwire Plus device (Medtronic, USA) before percutaneous coronary intervention (PCI) in patients with <12 h acute inferior myocardial infarction (AIMI) and Thrombolysis In Myocardial Infarction (TIMI) flow grade 0 to 1. The primary end point was the magnitude of ST-segment resolution after PCI.

METHODSA total of 122 patients (61 in Diver CE group and 61 in Guardwire Plus group) were studied. The magnitude of ST-segment resolution, myocardial blush grade and slow flow or no re-flow 1 h after PCI were measured in study patients.

RESULTSBaseline characteristics were similar between groups: age (59.6 +/- 14 years vs. 60.1 +/- 13 years), males (82% vs. 84%), diabetes (31% vs. 28%), previous coronary artery disease (25% vs. 23%), onset-to-angiogram (350 +/- 185 min vs. 345 +/- 180 min), and glycoprotein IIb/IIIa inhibitor use (11% vs. 13%, all P > 0.05). The magnitude of ST-segment resolution was also similar in these two groups: ST-segment resolution > 70% (57% vs. 59%, P > 0.05). Slow flow/no reflow rate (8% vs. 7%), TIMI flow grade 3 (95% vs. 97%) and myocardial blush grade 3 (70% vs. 72%) post PCI were not different in the groups (all P > 0.05). Left ventricle ejection fraction (0.54 +/- 0.12 vs. 0.53 +/- 0.11), death (3% vs. 3%), re-myocardial infarction (2% vs. 0) and target vessel revascularization (2% vs. 2%) at one month post PCI were comparable (all P > 0.05).

CONCLUSIONEfficacy of removing thrombus burden with Diver CE device or Guardwire Plus device was similar in patients with < 12 h acute inferior myocardial infarction.

Aged ; Angioplasty, Balloon, Coronary ; Female ; Humans ; Male ; Middle Aged ; Myocardial Infarction ; therapy ; Prospective Studies ; Stents ; Thrombectomy ; instrumentation

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A survey of factors influencing prognosis and control rate for patients with hypertension in mainland China.

Wen-Hang QI ; Chang-Yu PAN ; Shan-Yan LIN

Chinese Journal of Cardiology.2007;35(5):457-460.

OBJECTIVETo observe the risk factor stratification and prevalence of target organ damage in hypertensive patients before therapy and blood pressure control rate after 4 or 12 weeks antihypertensive drug therapy.

METHODSIn this prospective survey, data on cardiovascular risk factors, target organ damage and concomitant disease were collected in 26 655 hypertensive patients. Among them 26 325 and 3457 patients were recruited for antihypertensive drug therapy for 4 and 12 weeks, respectively and blood pressure control rate was determined.

RESULTSThe sedentary lifestyle, smoking, high body mass index, dyslipidemia were found in 52.5%, 34.4%, 31.8%, 24.5%, and microproteinuria, left ventricular hypertrophy, coronary artery disease and diabetes in 21.0%, 23.6%, 20.1%, 26.7% hypertensive patients, respectively. The average systolic and diastolic pressures were 158 +/- 14 mm Hg and 94 +/- 11 mm Hg and 3.2%, 22.2%, 21.1% and 53.3% patients were defined as low, medium, high and very high risk patients in risk stratification to quantify prognosis. There were 77.2%, 20.4% and 2.4% systolic and diastolic, isolated systolic and isolated diastolic hypertensive patients respectively. The goal blood pressure control rate was 50.2% and 56.7% respectively after 4 and 12 weeks antihypertensive drug therapy. The control rate in patients complicated with diabetes and renal disease was significantly lower than patients without them and systolic pressure control rate was remarkably lower than diastolic pressure control rate. Majority patients required 2 or more antihypertensive drugs for effective pressure control (1.5 drug per patients in average in both 4 or 12 weeks groups).

CONCLUSIONThe prevalence of risk factors, target organ damage and concomitant disease were high in Chinese patients with hypertension and comprehensive interventions were indicated. To reach goal blood pressure control in patients with hypertension, follow up intensifying and drug therapy guidance are required within the context of usual medical care.

Adolescent ; Adult ; Aged ; Aged, 80 and over ; China ; Female ; Humans ; Hypertension ; prevention & control ; therapy ; Male ; Middle Aged ; Prognosis ; Prospective Studies ; Risk Factors ; Treatment Outcome ; Young Adult

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Comparison of plasma low-density lipoprotein and oxidized low-density lipoprotein levels with coronary lesion severities in patients with coronary artery disease.

Xi-Min HE ; Ding-Cheng XIANG ; Jian-Xin HE ; Chang-Jiang HONG ; Jian QIU ; Jun MA ; Jin-Xia ZHANG

Chinese Journal of Cardiology.2007;35(5):451-456.

OBJECTIVETo explore the relationship between plasma low-density lipoprotein (LDL) and oxidized low-density lipoprotein (ox-LDL) levels and the severity of coronary atherosclerosis.

METHODSFasting plasma ox-LDL was measured by enzyme-linked immunosorbent assay and plasma LDL was measured by biochemical autoanalyser in 31 patients with coronary artery spasm (CAS group, chest pain with positive acetylcholine provocation test but without significant coronary artery stenosis), 35 patients with stable angina pectoris (SAP group) and 24 healthy persons (control group).

RESULTSPlasma LDL levels were similar between CAS and SAP groups but significantly higher than that in control group. Plasma ox-LDL levels significantly increased in proportion to coronary lesion severities [SAP (575 +/- 219 microg/L) > CAS (299 +/- 117 microg/L) > control (218 +/- 35 microg/L)]. In SAP group, plasma ox-LDL level was also significantly higher in multi-vessel disease group than that in single-vessel disease group (672 +/- 92 vs. 462 +/- 72 microg/L, P < 0.05).

CONCLUSIONPlasma ox-LDL but not LDL level is significantly correlated to the severity of coronary atherosclerosis and should therefore be the focused therapy target in patients with coronary artery disease.

Adult ; Aged ; Angina Pectoris ; blood ; classification ; Coronary Vasospasm ; blood ; Female ; Humans ; Lipoproteins, LDL ; blood ; Male ; Middle Aged

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Coronary artery lesion comparison between Chinese and Australian patients with coronary artery disease.

Shi-Sen JIANG ; Lei LÜ ; Crag JUERGENS ; Jian-Bin GONG ; Li-Jun WANG ; Yong-Ping PENG ; Dong-Jin XU ; Zhe-Yong HUANG

Chinese Journal of Cardiology.2007;35(5):447-450.

OBJECTIVETo compare coronary lesion characteristics by coronary angiography (CAG) between yellows and whites.

METHODSCAG results of 3021 Chinese patients, defined as yellows, from Nanjing and 3230 Australian patients, defined as whites, from Sydney were analyzed. The coronary artery lesion was evaluated by the number and location of coronary lesion and Gensini scores.

RESULTS(1) Coronary stenosis was diagnosed in 69.4% Chinese patients and 75.5% in Australians. The involved coronary arteries were left anterior descending branch, right coronary artery, left circumflex branch and left main coronary artery in a descending order in both Chinese and Australians. (2) The incidences of three-vessel disease and left main disease of yellows were significantly lower than that of whites in both male (29.8% vs. 34.0% and 9.6% vs. 14.2%) and female patients (15.8% vs. 26.2% and 4.9% vs. 11.6%) respectively, all P < 0.05. (3) There was an age-dependent Gensini scores increase in both yellows and whites patients and Gensini scores at age 40 and more of whites were significantly higher than those of yellows in comparable age groups.

CONCLUSIONThe incidences of three-vessel disease and left main disease as well as Gensini score were significantly higher in Australian patients than those of Chinese patients.

Adolescent ; Adult ; Age Factors ; Aged ; Aged, 80 and over ; Asian Continental Ancestry Group ; Australia ; epidemiology ; China ; epidemiology ; Coronary Angiography ; Coronary Artery Disease ; diagnostic imaging ; epidemiology ; ethnology ; European Continental Ancestry Group ; Female ; Humans ; Male ; Middle Aged ; Sex Factors ; Young Adult

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Prevalence of abnormal glucose regulation in patients with chronic ischemic heart failure.

Hao LIU ; Jin-Ming YU ; Fang CHEN ; Chang-Yu PAN ; Jue LI ; Da-Yi HU

Chinese Journal of Cardiology.2007;35(5):443-446.

OBJECTIVETo investigate the prevalence of diabetes mellitus (DM) and glucose abnormalities in patients with ischemic chronic heart failure (CHF).

METHODSA total of 1004 hospitalized eligible patients from 52 hospitals in 7 Chinese cities were included in this study.

RESULTSIn this survey, 420 out of 1004 patients had DM history (41.8%), 175 patients were newly diagnosed as DM (17.4%), 208 patients (20.7%) had impaired glucose tolerance (IGT). NYHA grade increases in proportion to severity of abnormal glucose metabolism [(r(s)) = 0.17, P = 0.001]. After adjustment of age and other factors, logistic regression analyses showed risk of suffering severe CHF symptoms (NYHA III/IV) increases with the severity of abnormal glucose metabolism: OR, 1.2, 95% CI: 0.7 - 1.7 in patients with IGT; 1.4, 95% CI: 0.9 - 2.1 in the newly diagnosed DM patients and 1.7, 95% CI: 1.2 - 2.4 in the DM history group, respectively.

CONCLUSIONSHigh prevalence of abnormal glucose metabolism was observed in patients with chronic ischemic hear failure and the severity of abnormal glucose metabolism was closely related to NYHA symptom grade.

Aged ; Aged, 80 and over ; Blood Glucose ; metabolism ; China ; Coronary Disease ; complications ; epidemiology ; metabolism ; Diabetes Mellitus ; epidemiology ; Female ; Glucose Intolerance ; epidemiology ; Heart Failure ; complications ; epidemiology ; metabolism ; Humans ; Male ; Middle Aged ; Prevalence ; Risk Factors

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