Objective To evaluate the effects of bupivacaine and ropivacaine on guinea pig papillary muscle action potential Methods The guinea pig papillary muscle preparation was exposed to ropivacaine (1, 3 or 5?g?ml -1 ) or bupivacaine ( 1, 3 and 5?g?ml -1 ) respectively, to measure maximum rate of depolarization (Vmax ), action potential amplitude (APA),action potential duration at 50% of repolarization(APD 50 ), and action potential duration at 90% of repolarization(APD 90 ) Results Vmax significantly decreased after exposure to both agents at all concentrations, Vmax decreased by 27 4% with ropivacaine at 5?g?ml -1 , and the degree was similar to that with bupivacaine at 3 ?g?ml -1 (28 4%) ,but was significantly lower than that with bupivacaine at 5 ?g?ml -1 (42 6%) (P

Objective To explore the clinical application of percutaneous endoscopic gastrostomy in gastroin- testinal nutrition among critically ill patients.Methods Twenty-two patients were undertaken percutaneous endo- scopic gastrostomy under the lead of gastroscope.The puncturatio site was located in anterior wall of stomach.Results All the procedures were performed successfully for one time.Intraoperational blood pressure was very steady.At the same time,intraoperational SpO_2 of the patients all exceeced 97%.The bleeding amount and operation time were respectively (3.8?1.9) ml and (15.5?2.3) min.Severe complications such as gastrostoma,gastrocolic fistula, pneumoperitoneum,refluxing or aspiration of gastric juice,inhalant pneumonia didn't occur after the operation.Con- clusion Percutaneous endoscopic gastrostomy was safe and feasible among critically ill patients who needed gastroin- testinal nutrition because of its slight injury,little bleeding and shorter operational time.

Animals ; Glutathione ; therapeutic use ; Liver ; metabolism ; physiopathology ; Male ; NF-kappa B ; biosynthesis ; Pancreatitis, Acute Necrotizing ; drug therapy ; metabolism ; physiopathology ; Rats ; Rats, Sprague-Dawley

OBJECTIVETo develop an HPLC method to determine vitexin-rhamnoside in plasma of Beagle dogs and study the pharmacokinetics and bioavailability of Yixintong sustained release tablets in Beagle dogs.

METHODA newly-developed HPLC method using C18 column and methanol-acetonitrile-tetrahydrogenfuran-0.5% acetic acid (1:1:19.4:78.6) as mobile phase was validated, and then was employed to determine vitexin-rhamnoside in plasma of Beagle dogs after oral administration of Yixintong sustained release tablets and general tablets. The main pharmacokinetic parameters were estimated by pharmacokinetic program 3p87. The non-compartmental pharmacokinetic parameters were also calculated on basis of the statistic moment theory.

RESULTThe pharmacokinetic profiles of Yixintong sustained release tablets and the general tablets were fitted to a one-and two-compartment open model, respectively. The T1/2, Tmax, AUC0-infinity and MRT for Yixintong sustained release tablets were 5.22 h, 4.0 h, 6,792.75 ng x h x mL(-1) and 8.4 h, respectively, compared with 8.94 h, 1.0 h, 5,880.4 ng x h x mL(-1) and 6.1 h for the general tablets. The relative bioavailability of the Yixintong sustained release tablets was 115.5% in Beagle dogs.

CONCLUSIONThe sustained-release characteristic of Yixintong sustained release tablets were confirmed by pharmacokinetic study.

Administration, Oral ; Animals ; Apigenin ; chemistry ; Biological Availability ; Dogs ; Drugs, Chinese Herbal ; administration & dosage ; pharmacokinetics ; Female ; Male ; Plasma ; chemistry ; drug effects ; Tablets ; administration & dosage ; pharmacokinetics

OBJECTIVETo observe the suppression of the expression of androgen receptor (AR) gene in PC3 cells after AR-specific siRNAs transfection, and to search for the siRNA (s) with the greatest suppressing efficiency.

METHODSFive AR-specific siRNAs were selected, RNAi expression vectors were constructed and transfected into PC3 cells, and the AR expression was detected by real time FQ-PCR and Western blot. A nonsense small RNA was set as negative control.

RESULTSCompared with the control group, the AR expression decreased in various degrees in the 5 experimental groups (P < 0.05), and siRNA1, siRNA4 and siRNA5 showed the greatest suppressing efficiency as compared with the other experimental groups, with statistically significant difference (P < 0.05).

CONCLUSIONThe AR-specific siRNAs could suppress the endogenous expression of target gene. Three siRNAs with great suppressing efficiency were identified and the expression vectors were constructed successfully. It can be applied in the future researches in vivo.

Blotting, Western ; Cell Line, Tumor ; Genetic Vectors ; genetics ; Humans ; Male ; Prostatic Neoplasms ; genetics ; metabolism ; pathology ; RNA Interference ; RNA, Small Interfering ; genetics ; Receptors, Androgen ; genetics ; metabolism ; Reverse Transcriptase Polymerase Chain Reaction ; methods ; Transfection

The aim of study was to set up a suitable method of isolation, culture and identification of endothelial progenitor cells (EPC) derived from rabbit bone marrow. Density gradient centrifugation was used to isolate mononuclear cells from bone marrow, the isolated mononuclear cells were cultured with specific culture medium for EPCs. EPCs were identified by cellular morphologic observation, immunohistochemistry testing, flow cytometry and the function test of taking up Dil-ac-LDL and FITC-UEA-1. The results indicated that the newly isolated bone marrow-derived mononuclear cells exhibited a round appearance, following culture for 48 hours, adherent cells grew in colony cluster, presenting with round or irregular appearance, and nuclear division was obvious. On day 7, flaky cell colonies mutually connected together, presenting with spindle-shaped cells. Immunohistochemistry testing in the EPCs showed CD133(+), CD34(+), VIII factor(++), KDR(++); flow cytometry testing showed that the positive rate of CD133 was (18.23+/-7.12)%, the positive rate of CD34 was 47.71+/-14.85%, the positive rate of CD31 was (71.61+/-13.51)%, the positive rate of KDR was (87.24+/-11.40)%. And more than 80% EPC could take up both Dil-acLDL and FITC-UEA-1. It is concluded that the mononuclear cells isolated from bone marrow by density gradient centrifugation can differentiate into EPCs under special culture situation.
Animals ; Bone Marrow Cells ; cytology ; Cell Culture Techniques ; methods ; Cell Differentiation ; Cells, Cultured ; Endothelial Cells ; cytology ; Rabbits ; Stem Cells ; cytology

OBJECTIVEDetecting hepatitis B virus large surface protein (HBLP) with serological method to filtrate the occult HBV infection and study the clinical detection strategy.

METHODSTwo thousands HBsAg negative stochastic serum samples were collected from the copy tubes in daily work to detect hepatitis B Virus markers (HBVM) with national EHSA regent kits and put them -20 degrees C frostily. The 2000 samples were detected with HBLP and filtrated the positive samples. The HBsAg markers were doubly counterchecked with other two adding kinds of national ELISA regent kits (total 3 kinds) at the filtrated samples. The last samples were doubly tested again with American MONOLISA HBsAg ULTRA regents. HBV DNA levels were quantitative analyzed with fluorescence quantitative PCR (FQ-PCR) and taking the mean results.

RESULTSFifteen HBLP positive samples were detected out from the 2000 serum samples. We educed the conform negative results from the three kinds of national regents but conform positive results from the American MONOLISA HBsAg ULTRA regents in repeating HBsAg detection at the 15 samples. The HBV DNA FQ-PCR quantitative results were all less than 500 copies/mi and divided into two cases hetween 400-500 copies/nil, three cases 300-400 copies/ml, five cases 200-300 copies/ml, four cases 100-200 copies/ml and one case was less than l00copies/ml.

CONCLUSIONThe false HBsAg negative results for serum samples are more generally through national regents than through importations and HBLP results mayhe are positive in these samples. Detecting HBLP marker is propitious to filtrate the occult HBV infection. This study provided a kind of serological reference for actively searching for the detecting strategy in occult HBV infection field.

Enzyme-Linked Immunosorbent Assay ; methods ; Female ; Hepatitis B ; blood ; diagnosis ; virology ; Hepatitis B virus ; genetics ; isolation & purification ; Humans ; Male ; Viral Envelope Proteins ; blood

Objective:To explore the predictive value of systemic immune-inflammation index (SII) and small and dense low-density lipoprotein-cholesterol (sdLDL-C) on contrast-induced acute kidney injury (CI-AKI) in patients with acute ST-segment elevation myocardial infarction (STEMI) undergoing emergency percutaneous coronary intervention (PCI).Methods:This retrospective analysis included 674 STEMI patients who underwent emergency PCI in Affiliated Hospital of Xuzhou Medical University from November 2019 to October 2021, all patients were divided into a training cohort ( n=450) and validation cohort ( n=224) at a ratio of 2∶1 according to the chronological sequence. The patients in the training cohort were further divided into CI-AKI group ( n=92) and non-CI-AKI group ( n=358). Information at admission and emergency blood biochemical indexes were collected, and the SII was calculated. Multifactorial logistic regression analysis was used to explore the independent factors influencing the occurrence of CI-AKI in STEMI patients undergoing emergency PCI in the training cohort and a predictive model was established. Receiver operating characteristic (ROC) curve and Hosmer-Lemeshow test were used to evaluate the model discrimination and calibration. Results:The prevalence of CI-AKI was 20.4% (92/450). Age, proportion of women, sdLDL-C, urea, baseline creatinine, uric acid, neutrophil count, neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR) and SII were significantly higher in the CI-AKI group than in the non-CI-AKI group (all P<0.05), and left ventricular ejection fraction (LVEF), high-density lipoprotein cholesterol, estimated glomerular filtration rate (eGFR) and lymphocyte count were significantly lower in the CI-AKI group than in the non-CI-AKI group (all P<0.05). The results of multifactorial logistic regression analysis showed that age ( OR=1.046, P=0.001), LVEF ( OR=0.916, P<0.001), sdLDL-C ( OR=4.754, P<0.001), uric acid ( OR=1.012, P=0.007), eGFR ( OR=0.994, P=0.002), and lnSII ( OR=2.471, P<0.001) were independent determinants of CI-AKI after emergency PCI in STEMI patients. ROC curve analysis showed that area under the curve (AUC) for the diagnosis of CI-AKI was 0.688 with a sensitivity of 73.9% and specificity of 61.5% for the SII cut-off point of 1 179.07×10 9/L. The AUC for the diagnosis of CI-AKI was 0.709 with a sensitivity of 65.2% and specificity of 77.4% for the sdLDL-C cut-off point of 1.147 mmol/L. The AUC for the diagnosis of CI-AKI was 0.847 with a sensitivity of 88.0% and a specificity of 70.6% for the combination of SII and sdLDL-C with age, LVEF, uric acid and eGFR. The Hosmer-Lemeshow test (χ2=6.913, P=0.546) proved the goodness of fit of the model. Conclusions:SII and sdLDL-C have significant clinical value in the prediction of CI-AKI. SII and sdLDL-C combined with age, LVEF, uric acid and eGFR could further improve the predictive efficacy of CI-AKI.

OBJECTIVE: To determine the therapeutic status and rate of reaching target blood pressure in elderly isolated systolic hypertension (EISH) patients who were hospitalized and to discuss the rationality of the drug therapy. METHODS: Three hundred and fifty-seven EISH inpatients were investigated retrospectively. The frequencies of using antihypertensive drugs and the strategy of drug therapy programs were calculated. The drug efficacies were assessed among various drug therapy groups. RESULTS: The frequencies of using antihypertensive medicine categories were calcium channel blocker (CCB) 64. 15%, angiotensin-converting enzyme inhibitor (ACEI) 32.77%, diuretics 26.33%, beta-blocker (BB) 25.77%, angiotensin receptor blocker (ARB) 23.81%, and alpha-blocker 4.20%, respectively. Among the 357 cases 42.86% were treated with monotherapy while 57.14% with combined therapy. Among the combination therapy groups, the diuretic-based multiple therapy occupied 16.53%, and the non-diuretic-based multiple therapy held 40.62%. The systolic blood pressure control rate was 67.79%. The rate of diastolic blood pressure < or = 70 mmHg was 26.89%, 8 cases of them occurred myocardial ischemia. CONCLUSION How to select the optimal antihypertensive drug therapy for EISH patients is important in achieving the blood pressure goal. While thinking over intervention at lower blood pressure levels to achieve target goals, physicians should prevent from excessively lowering the diastolic blood pressure.
Adrenergic beta-Antagonists ; therapeutic use ; Aged ; Angiotensin-Converting Enzyme Inhibitors ; therapeutic use ; Antihypertensive Agents ; therapeutic use ; Calcium Channel Blockers ; therapeutic use ; Diuretics ; therapeutic use ; Drug Therapy, Combination ; Female ; Humans ; Hypertension ; drug therapy ; Male ; Retrospective Studies ; Systole

OBJECTIVEWe observed the therapeutic effectiveness and safety of different antidepressants as well as the correlation between symptomatic improvement of depression and improvement of chest pain in patients with susceptible "angina pectoris" and negative coronary angiogram complicating comorbid depression.

METHODSIn this double-blinded randomized study, a total of 123 eligible patients were allocated into three groups: (1) Group F: fluoxetine 20 mg QN (n = 41); (2) Group P: Placebo 1 tablet QN (n = 40); (3) Group F + O: fluoxetine 20 mg + olanzapine 2.5 mg QN for the former 2 weeks and only fluoxetine 20 mg QN for the latter 2 weeks (n = 42). The total therapy duration was 4 weeks. HAMD, HAMA and self-evaluation table of chest pain were obtained before therapy, at the end of 1 and 2 weeks after therapy.

RESULTSBaseline HAMD and HAMA scores and self-evaluation score of chest pain were similar among 3 groups and all scores were significantly improved post various therapies in the order of group F + O > group F > group P. The rate of score decrease were seen after 1 week treatment in group F + O and after 2 week treatment in group F. There was a significant positive correlation between the rates of self-evaluation chest pain score decrease and HAMD (r = 0.867, P < 0.001) and HAMA (r = 0.854, P < 0.001) score decreases after 4 weeks therapies (P < 0.05). During the whole course of treatment, no serious adverse reaction was found in all patients.

CONCLUSIONIn patients with suspected "angina pectoris" and negative coronary angiogram complicating comorbid depression, the antidepressants were safe and significantly improved the symptoms of depression and anxiety and chest pain. Low dose fluoxetine plus short term olanzapine regimen was superior to fluoxetine alone regimen in terms of stronger and quicker symptom improvement.

Aged ; Angina Pectoris ; diagnostic imaging ; drug therapy ; psychology ; Antidepressive Agents, Second-Generation ; therapeutic use ; Benzodiazepines ; therapeutic use ; Coronary Angiography ; Depressive Disorder ; drug therapy ; etiology ; Double-Blind Method ; Female ; Fluoxetine ; therapeutic use ; Humans ; Male ; Middle Aged