BACKGROUND: Previous studies have found that skeletal muscle satellite cell transplantation can induce angiogenesisin myocardial infarction area, reduce infarct size and improve cardiac function. But the overall effect is not satisfactory.OBJECTIVE: To observe the survival of basic fibroblast growth factor (bFGF) gene modified skeletal muscle satellitecells in acute myocardial infarction and to observe the expression of bFGF gene and the effect of cell transplantation onangiogenesis in myocardial infarction area.METHODS: Eighteen New Zealand white rabbits were divided into three groups by random: skeletal muscle satellite cellgroup (control group), bFGF gene enhanced skeletal muscle satellite cell group (experimental group) and blank controlgroup. The left anterior descending branch of the coronary artery of the rabbits was ligated so as to establish an animalmodel of acute myocardial infarction in the former two groups. After labeled by DAPI before transplantation, the skeletalmuscle satellite cells, bFGF gene modified skeletal muscle satellite cells and the equivalent amount of DMEM/F12 wereinjected into the local infarct myocardium correspondingly. Samples were taken 4 weeks after transplantation. Then, thesurvival of skeletal muscle satellite cells and the expression of bFGF gene were observed under light microscope andfluorescence microscope, and the neovascularization in the myocardial infarction area was examined byimmunohistochemical staining.RESULTS AND CONCLUSION: No DAPI-labeled cells were visible in the blank control group, but in the other twogroups, a large amount of DAPI-labeled skeletal muscle satellite cells were seen in the infarction area. Enhanced greenfluorescent protein was highly expressed in the experimental group. Microvessel density in the infarction area washighest in the experimental group followed by the control and blank control groups (P < 0.05). These findings indicatethat bFGF gene modified skeletal muscle satellite cells can survive and promote neovascularization in the acutemyocardial infarction area.

BACKGROUND:Skeletal muscle satel ite cells are totipotential stem cells with multi-directional differentiation potential, locate in skeletal muscle interstitium, have a certain tolerance to ischemia and hypoxia, and are important cells in stem cellengineering.
OBJECTIVE:To establish a thrifty, convenient culture procedure and create a simple, efficient method to transfect skeletal muscle satel ite cells, and investigate genetic expression after the transfection for cellular cardiomyoplasty.
METHODS:Skeletal muscle satel ite cells were isolated from rabbit thigh and cultured. Their growth curves were determined by CKK-8 method. Grouped by different proportions of the plasmid and liposome, skeletal muscle satel ite cells were transfered by the enhanced green fluorescent protein plasmid based on liposome. After transfection, the efficiency and character of target genetic expression was determined.
RESULTS AND CONCLUSION:Satel ite cells were isolated, cultured and transfected successful y. In suitable ratio of plasmid and liposomes, the transfection efficiency reached up to above 35%. The target protein was expressed within 12 hours after transfection, reached maximum in 48-72 hours and decreased gradual y after one week. The expression stil could be observed two weeks latter. The enhanced green fluorescent protein plasmid conducted by cationic liposome could be transfered into skeletal muscle satel ite cells efficiently. The transfection efficiency was correlated closely to the ratio of plasmid and lipofectamine. The change of target gene expression depended on time.

Adult ; Extracorporeal Circulation ; Female ; Humans ; Pregnancy ; Pregnancy Complications, Cardiovascular ; surgery ; Pregnancy Trimesters ; Thoracotomy ; methods

Objective To evaluate the performance of the Sysmex XE-5000 analyzer for analyzing atypical lymphocytes ,baso-philic granulocytes and their abnormalities warnings .Methods A total of 197 specimens with both atypical lymphocytes and baso-philic granulocytes warnings and 914 specimens with single warning of atypical lymphocytes indicated by Sysmex-5000 blood cell analyzer were collected and inspected by microscope simultaneously .Results Using microscopic examination as a standard ,baso-philic granulocytes within the normal range ,the coincidence rate of samples with both atypical lymphocytes and basophilic granulo-cytes warnings was 64 .9% ,while the coincidence rate of samples with single warning of atypical lymphocytes was 72 .5% .The for-mer was significantly lower than the latter(P<0 .05) .Conclusion When Sysmex XE-5000 indicates atypical lymphocytes and baso-philic granulocytes simultaneously ,there is interference between each other .It should be combined with microscopic examination in order to reduce the probability of missed diagnosis and misdiagnosis .

Objective To propose a new blood purification modality-hemodialysis with plasma- based dialysate (HD-PBD) plus high volume hemofiltration (HVHF) for patients with liver failure, and to evaluate the effect of this treatment on plasma cytokines.Methods Twelve patients with liver failure were included in this study.All patients received HD-PBD therapy in the first 6 hours,and then were treated with HVHF for 24 hours with the same filter (AV600).The levels of TNF-?,IL-1?, IL-6 and IL-8 in plasma before and after HD-PBD plus HVHF for 6 and 24 hours were examined respectively by ELISA,and changes of clinical parameters were observed at the same time point. Serum bilirubin,total bile acids (TBA),serum ammonia,blood urea nitrogen (BUN) and serum creatinine (Scr) were detected before and after treatment.Arterial blood gas analysis and the concentration of electrolytes were monitored before and after treatment.Results (1)HD-PBD for 6 hours was more effective than HVHF for 24 hours in removal of serum bilirubin and TBA(P＜0.05). (2)Serum ammonia,BUN,Ser,arterial blood HCO_3~-,PCO_2,PO_2 and electrolytes did not show significant difference before and after HD-PBD (P＞0.05),but these parameters significantly changed before and after HVHF (P＜0.05).(3)The average level of serum bilirubin was sharply decreased after HVHF for 24 h following HD-PBD(P＜0.05).(4)After HD-PBD plus HVHF,there was a marked reduction of the plasma levels of TNF-?,IL-6 and IL-8.Conclusions HD-PBD plus HVHF,a newly proposed modality for patients with liver failure,can effectively decrease serum bilirubin,TBA,BUN,Scr,ammonia and cytokines,and adjust water-electrolyte as well as acid- alkali balance.It is a low-cost,safe,simple and convenient therapy.

Objective To explore the relationship between the CHADS2 score and short-term prognosis in acute ischemic stroke patients with nonvalvular atrial fibrillation. Methods Consecutive ischemic stroke patients with nonvalvular atrial fibrillation who were hospitalized within 7 days after stroke were registered.Patients were divided into 3 groups on the basis of CHADS2 pre-stroke score (0 to 1,2,3to 6).And recovery was assessed by modified Rankin Scale (mRS) at 3 months follow-up (mRS ≤ 2reflected good prognosis,and mRS ≥ 5 implicated unfavorable outcome).After screening the risk factors affecting prognosis using univariate analysis,the relationship between CHADS2 score and prognosis was estimated using logistic regression model.Results Of 203 patients enrolled,the CHADS2 score of 0-1,2,3-6 were present in 72,53 and 78 respectively.Patients with the higher CHADS2 score had a higher initial NIHSS score (9.8,12.6,13.0,F =3.404,P =0.008 ),more likely to receive nosocomial pulmonary infection( 12.5％,34.0％,39.7％,x2 =14.643,P =0.001 ),negatively related to good prognosis (x2 =28.542,P =0.000 ) and positively related to unfavorable outcome ( x2 =23.575,P =0.000 ).Logistic regression model results suggested that CHADS2 score was an independent predictor of good prognosis and unfavorable outcome. Compared with CHADS2 score 3-6, CHADS2 score 0-1 was independently associated with good prognosis ( OR =5.018,95 ％ CI 2.055-12.560 ).And compared with CHADS2 score 0-1,CHADS2 score 3-6 was independently associated with unfavorable outcome ( OR =6.197,95％ CI1.670-22.996 ).Conclusions CHADS2 pre-stroke score appears to be useful in prediction of stroke outcome for patients with nonvalvular atrial fibrillation.After acute ischemic stroke,the patients with the lower CHADS2 score (0-1) are more likely to achieve good prognosis,inversely,the patients with the higher CHADS2 score (3-6) are more likely to achieve unfavorable outcome.

Objective To probe a simple, safe, and minimally invnsive method to treat ectopic pregnancy with preservation of the organs. Methods Superselective catheterization of uterine artery through cannulation of right femoral artery was achieved in 56 patients with ectopic pregnancy. Location of the lesions involved, feeding arteries, and active bleeding were observed on angiography. 150 mg of methylamine neopterin diluted in 100 ml of saline water was infused slowly into the target artery. Small gelatin spongy particles with size of 0.5 mm in diameter were used to embelize the uterine artery until its branches were totally obliterated. Follow-up was undertaken to observe the results of the treatment. Results Suporselective uterine arterial infusion and embolization were successfully performed in all 56 patients without any related complications. Active bleeding in the peritoneum in 33 cases ceased soon after embolization. The embryos in 13 patients were confirmed to have died by ultrasound two days after the procedure. Beta-HCG value dropped to below 5 U/L within two to twelve days. Hemorrhage in the peritoneum dissolved after seven days in all cases. Mixed mass disappeared after one month. Histerosalpingography was performed three months after the procedure in 19 patients and patent fallopians were demonstrated in 11 patients. Conclusions Superselective uterine arterial infusion and embolization is a minimally invasive procedure, which can be used to effectively treat ectopic pregnancy by disabling the ectopic embryo and embelizing leaking arteries with the advantages of preserving the fallopian tubes.

Objective To investigate the relationship between blood pressure(BP) and prognosis in three different ischemic stroke subtypes.Methods The consecutive patients with a brain infarction proven on diffusion-weighted MRI who were hospitalized within 48 hours after stroke onset between April 2007 and April 2008 were registered.All subjects with acute ischemic stroke consecutively admitted to the neurological wards of the First Affiliated Hospital of Wenzhou Medical College,were registered in the Wenzhou Stroke Registry Program.Data were collected and coded at primary registration.The BP levels were studied during the initial 7 hospital days.Survival and dependency were assessed at 3 months.Outcomes were adjusted age,consciousness level,admission NIHSS score,the decline level of systolic BP,the decline level of diastolic BP,complication and so on. Logistic regression model was used to estimate the relationship between BP and prognosis.Results A U-shaped effect was observed in each subgroup between BP and prognosis.In the subgroups of atherothrombosis,cardioembolism and small artery disease,those who had a BP of 150/95 mm Hg(1 mm Hg=0.133 kPa)on admission,140/90 mm Hg on day 1-7 would have a better prognosis.In the subgroups of atherothrombosis and cardioembolism,the decrease of BP during the first 24 hours was the independent predictor of the death and disability at 3-month.In the atherothrombosis group,when the decrease of systolic BP during the first 24 hours was greater than 20 mm Hg,the risk of the death and disability at 3-month increased 4.44 times(OR 4.44,95%CI 1.70-11.59,P=0.002).In the atherothrombosis group,when the decrease of diastolic BP during the first 24 hours was greater than 10 mm Hg,the risk of the death/disability at 3-month increased 3.70 times(OR 3.70,95%CI 1.54-8.90.P=0.00).In the cardioembolism group,the risk increased respectively 7.98 times(OR 7.98,95%CI 1.34-47.66.P=0.026)and 6.68 times(OR 6.68.95%CI 1.55-28.79,P=0.01).In the subgroups of small artery disease,the decrease of BP during the first 24 hours was not the independent predictor of the death and disability at 3-month.Conclusions A U-shaped effect is observed in each subgroup between BP and prognosis.In the subgroups of atherothrombosis and cardioembolism,the decrease of BP during the first 24 hours is the independent predictor of the death and disability at 3-month.

Objective To summarize the features of esophageal hiatus hernia (EHH) on contrast-enhanced ultrasound (CEUS) and investigate the diagnostic value of CEUS in EHH.Methods A retrospective analysis of 88 EHH patients and 50 healthy controls was conducted with focus on their findings on CEUS.Results The structures of the cardiac and abdominal esophagus were clear in 50 healthy controls,and the esophageal hiatus diameters were (1.96±0.39) cm.In contrast,the cardiac and abdominal esophagus in EHH patients were unable to be identified in subdiaphragm region.The esophageal hiatus was wider with a diameter of (3.24±0.76) cm.The difference was statistically significant(t=2.36,P＜0.05).The hernia sacs were found in 78 EHH patients at rest.And the hernia sacs were present on the diaphragm in 10 EHH patients after pressure.The maximum diameter of hernia sac was 7.6 cm.The size of hernia sac may change with abdominal pressure.In sliding EHH patients,the sac wall was found to slide up and down the diaphragm.A mass was found on the wall in 2 patients.The B ring was present in 76 patients.For healthy controls in supine position,contrast-enhanced ultrasound showed that the gastric bottom and diaphragm were at dependent or horizontal position.The gastric bottom and diaphragm was upward in 73 patients.Conclusions The EHH has characteristic appearance on CEUS.It is easy to detect and diagnose EHH with CEUS,which has a diagnostic value in detection of space-occupying lesions in hernia sac.CEUS can be used for EHH screening.

Objective To explore the mechanism of intrathoracic pressure(ITP) influncing cardiac function and facilitate noninvasive determination of ventricular pressure theoretically.Methods With Valsalva and Mueller maneuver,two-dimension images of standard long axis views and the cross-sectional views were recorded in 20 volunteers,aged from 18 to 45 years,at the specific ITP levels(including-20 mmHg、-10 mmHg、0 mmHg、+ 10 mmHg and + 20 mmHg).The subjects were instructed to mantain for at least 10 s,and three successive measurements were recorded and averaged.The stroke volume(SV) and radius of curvature(R) were obtained from further off-line analysis.Results With the ITP maintaining at -20 mmHg,-10 mmHg,0 mmHg(end expiration),+ 10 mmHg and + 20 mmHg respectively,the corresponding radiuses of curvature were (2.35 ±0.24)cm,(2.25 ± 0.23)cm,(2.14 ± 0.21)cm,(2.02 ± 0.21) cm,(1.93 ± 0.19) cm,there were statistically significances between two groups (P =0.006,0.031,0.005 and ＜0.001,respectively].When the ITP were at 0 mmHg(end expiration),+ 10 mmHg and + 20 mmHg,the stroke volume were (71.54±8.81)ml,(73.20±9.52)ml and (78.81± 14.61)ml (P =0.674,0.135).When the intrathoracic pressure decreased from 0 mmHg to-20 mmHg,the stroke volume were (78.81±14.61)ml,(68.28 ±9.28)ml and (59.69±7.52)ml(P =0.029,0.037).Conclusions The ITP has different effects on the two ventricles,and subsequently generates a pressure gradient across the IVS which can alter its shape and position at end-diastole.With the IVS shifting,the preload and filling function of left ventricle gets changed acorrding to the Frank Starling principle.