BACKGROUND: Cell apoptosis and ventricle reconstitution following myocardial infarction are of mutual cause-effect, and they cause vicious cycle. How to reduce the apoptosis events following myocardial infarction is one of keys to saving heart function.OBJECTIVE: To observe the effect of umbilical cord blood mesenchymal stem cell (UCBSMC) transplantation on remaining myocardial tissue of dogs with acute myocardial infarction.DESIGN: A randomized controlled observation.SETTING: Department of Cardiothoracic Surgery, Xinhua Hospital.MATERIALS: This study was carried out in the Central Laboratory of Xinhua Hospital from October 2005 to May 2007.Thirty-six adult hybrid dogs, male and female in half, were provided by the Animal Experimental Center of Xinhua Hospital.METHODS: Thirty-six dogs were divided into cell transplantation group and control group, with 18 dogs in each according to table of random digit. Mesenchymal stem cells were isolated from the umbilical cord blood of full-term pregnant hybrid dogs, cultured and amplified. Then, they were labeled with Laz gene, in vitro induced with 5-azacytidine, and transplanted into the dogs with acute myocardial infarction in the cell transplantation group. Rats in the control group were injected with the same amount of normal saline. Each dog was euthanized by anesthesia for harvesting myocardial specimen 1,4 and 8 weeks after transplantation.MAIN OUTCOME MEASURES: ① Remaining and apoptosis index detected by TUNEL method. ② Myocardial cell volume and histomorphology detected by confocal microscopy. ③ Histological change of myocardial collagen network detected by haematoxylin-basic fuchsin-picric acid staining.RESULTS: Thirty-six involved experimental dogs all entered the stage of final analysis. ①The apoptosis index in the cell transplantation group was significantly lower than that in the control group 1, 4 and 8 weeks after cell transplantation (P ＜0.05). ② Myocardial cell volume in the cell transplantation group 1, 4 and 8 weeks after cell transplantation was significantly larger than that in the control group (P ＜ 0.05). ③ Collagen fiber in the myocardial tissue of dogs in the cell transplantation group was arranged in order and regularly, and in contrast that in the control group was not, and fibers in the control group fused partially.CONCLUSION: UCBSMC transplantation reduces the apoptosis of myocardial cells, promotes the hypertrophy of remaining myocardial cells, regulates myocardial collagen network and improves heart function.

BACKGROUND:Kienb?ck disease lacks of suitable animal models, which are similar to the pathological process of avascular necrosis of human lunate bone.
OBJECTIVE:To establish a new animal model of Kienb?ck disease using medical TH adhesive embolism and to explore the rationality of model establishment.
METHODS:A total of 30 healthy adult New Zealand rabbits, male or female, were selected. Using self-control method, the rabbits were randomly assigned to experimental sides and control sides. By dril ing in the center of the lunate bone, 0.2 mL of medical TH glue was injected three times. An equal volume of physiological saline was injected into the center of the lunate bone on the control side. X-ray examination, general observation, Micro-CT measurement of bone, and tissue pathology detection were conducted at 4, 8 and 12 weeks.
RESULTS AND CONCLUSION:Gross specimen, X-ray and histological results showed that ischemic necrosis of the lunate bone on the experimental side was visible at 8 weeks after model induction. The ischemic necrosis of the lunate bone became more typical at 12 weeks. Among the Micro-CT microscopic parameters of trabecular bone, trabecular bone density parameters bone volume fraction and the number of trabecular bone were significantly lower on the experimental side than those on the control side (P<0.05). Spatial parameters of trabecular bone significantly increased. Trabecular separation and structure model index on the experimental side were significantly greater than those on the control side. Results suggested that ischemic necrosis of the lunate bone appeared on the experimental side at 8 weeks after injection of medical TH glue. Rabbit models of ischemic necrosis of the lunate bone can be established at 12 weeks. Thus, alterations, which were similar to ischemic necrosis of human lunate bone, appeared, such as blood transportation damage in the lunate bone, trabecular bone fracture, and empty lacuna, when surrounding tissues were not obviously injured.

A new sesquiterpene hydroquinone (1) was isolated from a deep sea sediment derived fungus, Phialocephala sp.. Its structure and stereochemistry were established on the basis of spectroscopic data and optical rotation. This compound was tested for cytotoxicity against P388 (murine leukemia cell) and K562 (human leukemia cell) cell lines, and displayed strong cytotoxic effects with IC50 value of 0.16 and 0.05 micromol x L(-1), separately.

Objective To explore the characteristics of operation,curative effects and operative management in elderly patients of age older than 70 years with coronary heart disease receiving coronary artery bypass grafting.Methods 108 elderly patients of age older than 70 years with coronary heart disease were divided into two groups:OPCAB group(n = 76) and CCABG group (n = 32) The clinical curative effects, early postoperative mortality and complications of the two groups were compared and analyzed respectively. Results OPCAB group was better than CCABG group in these series(P ＜ 0.05): The early postoperative mortality (5.8%, 11.2%)、 myocardial infarction (2.9%, 10.6%), respiration failure(8.7%, 17.5%), pulmonary complications: (11.8%, 31.5%) 、complication of CNS:(1.8% ,9.8%) 、acute renal failure(1.8% ,6.2%) ,the time of intubation: (9.3 ±4.5), (25.4 ±7.5) h,ICU stay(3.1 ± 1.8) ,(7.1 ±2.9) d,hospital stay(15.5 ±8.6) ,(26.4 ±8.6)d. Conclusion OPCAB could reduce operative mortality and complication, it should be the first option for the surgery of elder patients with coronary heart disease;surgical skills and correct perioperative management were the key factors to assure surgical outcome.

Objective To observe the expression of Caspase-12 and GRP78 of endoplasmic reticulum stress (ERS) in cardiac arrest and beating heart mitral valve replacement Methods Thirty patients with rheumatic heart disease mitral stenosis were randomly divided into beating heart group (BH,n=15) and cardiac arrest group(CA, n = 15). Both groups accepted MVR by beating heart surgery and cardiac arrest surgery under cardiopulmonary bypass (CPB) respectively. Right atrial myocardial tissues were collected at prior the start of CPB (T0), after aortic cross-clamping 30 minutes (BH group 30 minutes after CPB, T1) and stitched right atrium (T2) respectively. The method of reverse transcriptase polymerase chain reaction (RT-PCR) was applied to detect the expression level of Caspase-12 and GRP78 in two groups and positive staining of Caspase-12 and GRP78 of myocardial tissue slices in both groups was observed by immunohistochemical method. Results The expression of Caspase-12 in CA group heightened at T1and significantly increased at T2 (P < 0.05) but the expression of Caspase-12 in BH group had increased in T2 only (P < 0.05). Caspase-12 in CA group expressed higher than that in BH group at T1 and T2. The expression of GRP78 had increased at T1 in two groups but it in CA group expressed higher than that inBH group at T2. The number of positive staining of Caspase-12 and GRP78 in CA group was higher than that in BH group at T2. Conclusion MVR of beating heart can reduce the reaction of ERS to enhance the myocardial protection under CPB.

Anopheles minimus was once a main malaria vector in Hainan Island and had been e-liminated basically through the campaign of indoor residual spraying launched in 1959. It again became an incriminated vector of some focal malaria outbreaks in recent years. The present study was conducted in a selected county-Danxian and a typical hilly area-Feibar in the west part of Danxian county in 1989-1990.An. minimus was found in 50% and 62. 5 % of the surveyed sites at mountainous and hilly area of Danxian county,but not found in coastal region. An. minimus was found in all 18 sites surveyed in Feibar district constituting 52% of anopheline composition. Man-biting rate made by human-baited collection was 3. 2 before midniaght and 38. 2 when collected through whole night in some sites. However, the behaviour characteristics of An. minimus has changed. It has become exophilic,exophagic, and has an equal preference for man and cattle. The vectorial capacity of An. minimus estimated by quantitative data was in accord with malaria infection rate in Feibar district ,and the malaria infection rate among the inhabitants in three types of residential quarter with different socioeconomic conditions. Malaria infection rates of residential quarter of land-reclamation outcomers, villagers and state farm residents were 10%,2. 9% and 0. 5% respectively during 40 days from July to August,1990.Owing to the fact that An. minimus has become a secondary vector only next to An. dirus, with a wide range of distribution and a considerable different characteristics in behaviour compared to that before spraying campaign , it is suggested that a malaria control programme must be seriously planned to adjust the new problem of malaria epidemiology in Hainan Province.

The clinical data of 31 patients with congenital heart disease(CHD)receiving minimally invasive surgical closure through chest or femoral venous catheter from June 2016 to September 2017 were analyzed retrospectively.All patients were diagnosed with esophageal echocardiography before operation.During the operation,the insert of guide wire and the sheath tube,and the placement of the sealing parasol were monitored and guided by transesophageal echocardiography (TEE).Satisfactory results were obtained in 30 patients.In 1 patients,the sealing parasol was detached,and open chest surgery was performed to remove the detached parasol and to repair the defect.TEE-guided minimally invasive surgical closure through chest or femoral vein catheter is safe and effective in the treatment of congenital heart disease and has certain clinical applicative value.

Background: Our previously prepared ceftiofur (CEF) hydrochloride oily suspension shows potential wide applications for controlling swine Streptococcus suis infections, while the irrational dose has not been formulated. Objectives: The rational dose regimens of CEF oily suspension against S. suis were systematically studied using a pharmacokinetic-pharmacodynamic model method. Methods: The healthy and infected pigs were intramuscularly administered CEF hydrochloride oily suspension at a single dose of 5 mg/kg, and then the plasma and pulmonary epithelial lining fluid (PELF) were collected at different times. The minimum inhibitory concentration (MIC), minimal bactericidal concentration, mutant prevention concentration (MPC), post-antibiotic effect (PAE), and time-killing curves were determined. Subsequently, the area under the curve by the MIC (AUC 0–24h /MIC) values of desfuroylceftiofur (DFC) in the PELF was obtained by integrating in vivo pharmacokinetic data of the infected pigs and ex vivo pharmacodynamic data using the sigmoid E max (Hill) equation. The dose was calculated based on the AUC 0–24h /MIC values for bacteriostatic action, bactericidal action, and bacterial elimination. Results: The peak concentration, the area under the concentration-time curve, and the time to peak for PELF's DFC were 24.76 ± 0.92 µg/mL, 811.99 ± 54.70 μg·h/mL, and 8.00 h in healthy pigs, and 33.04 ± 0.99 µg/mL, 735.85 ± 26.20 μg·h/mL, and 8.00 h in infected pigs, respectively. The MIC of PELF's DFC against S. suis strain was 0.25 µg/mL. There was strong concentration-dependent activity as determined by MPC, PAE, and the time-killing curves. The AUC 0–24h /MIC values of PELF's DFC for bacteriostatic activity, bactericidal activity, and virtual eradication of bacteria were 6.54 h, 9.69 h, and 11.49 h, respectively. Thus, a dosage regimen of 1.94 mg/kg every 72 h could be sufficient to reach bactericidal activity. Conclusions A rational dosage regimen was recommended, and it could assist in increasing the treatment effectiveness of CEF hydrochloride oily suspension against S. suis infections.

Objective: To investigate the incidence of hepatic encephalopathy (HE) in patients with non-cirrhotic portal hypertension (NCPH) and to explore its risk factors. Methods: The incidence rate of HE in 150 cases with NCPH was evaluated in two hospitals, and 188 cases of compensated cirrhosis patients were taken as control. Logistic regression was used to screen for independent risk factors for HE in patients with NCPH. Results: The incidence of overt hepatic encephalopathy (OHE) in patients with NCPH was not statistically significantly different from that in patients with cirrhosis (4.7% vs. 6.9%, P = 0.682). The incidence of mild hepatic encephalopathy (MHE) was significantly lower than that of cirrhosis patients (32.7% vs. 46.3%, P < 0.05). The presence of upper gastrointestinal bleeding, infection and portosystemic venous shunt were the main independent factors for HE in NCPH patients (OR > 1, P < 0.05). Conclusion HE is one of the important complications of NCP, and may be influenced by factors such as upper gastrointestinal bleeding, infection and portosystemic venous shunt.

[Abstract] Objective: To construct a circRNA profile of esophageal squamous cell carcinoma (ESCC) and analyze differentially expressed circRNAs. Methods: Samples were taken from 3 patients with esophageal squamous cell carcinoma who were hospitalized in the Department of Thoracic Surgery, Jintan Hospital, Jiangsu University from June 2018 to February 2019. The circRNA expression profile was constructed by high-throughput sequencing technique, and the circRNA differentially expressed in 3 pairs of esophageal squamous cell carcinoma tissues and adjacent tissues was detected. The biological functions and related signal pathways of these circRNA were analyzed by GO and KEGG techniques. Results: By comparing the expression levels of circRNA between esophageal squamous cell carcinoma and adjacent tissues, 905 differentially expressed circRNA were found, of which 404 were up-regulated and 501 were down-regulated. hsa_circ_0004390 was the CIRC RNA with the highest up-regulation factor (FC=7.9712), and novel_circ_0012687 was the one with the highest down-regulation factor. GO and KEGG analysis showed that these circRNA may be involved in biological processes such as cell cycle, cell components and protein binding of cancer cells, and signal pathways such as Hippo and cGMP-PKG. Conclusion: The expression profile analysis of circRNA in esophageal squamous cell carcinoma showed that the significantly differentially expressed circRNA could be used as a potential biomarker of esophageal squamous cell carcinoma.