Aged ; Antigens, CD20 ; metabolism ; Brain Neoplasms ; metabolism ; pathology ; Humans ; Immunohistochemistry ; Leukocyte Common Antigens ; metabolism ; Lymphoma, Large B-Cell, Diffuse ; metabolism ; pathology ; Male ; Vascular Neoplasms ; metabolism ; pathology

OBJECTIVETo investigate the effect of miRNA-101 on the expression of the enhancer of zeste homolog 2 (EXH2) in human androgen-independent prostated cancer LNCaP cells.

METHODSWe divided LNCaP cells into a blank control, a negative control, and a miRNA-l01 transfection group, constructed the vector by transfecting synthetic miRNA-101 mimics into the LNCaP cells, and evaluated the efficiency of transfection by fluorescence microscopy. Then we determined the expression level of EZH2 mRNA by qRT-PCR in the three groups of cells and that of the EZH2 protein in the negative control and transfection groups by Western blot.

RESULTSGreen fluorescence signals were observed in over 70% of the LNCaP cells in the transfection group after 24 hours of transfection. At 72 hours, the expression of miRNA-101 was significantly upregulated in the transfected cells (P < 0.01), that of EZH2 mRNA was remarkably lower in the transfection group (0.01 ± 0.10) than in the blank control (0.95 ± 0.40) and negative control (0.86 ± 0.30) groups (both P < 0.01), and that of the EZH2 protein was increased in the negative control but decreased in the transfection group with the extension of culture time.

CONCLUSIONmiRNA-101, with its inhibitory effect on the expression of EZH2 in LNCaP cells, is a potential biotherapeutic for prostate cancer.

Androgens ; Cell Line, Tumor ; Enhancer of Zeste Homolog 2 Protein ; Genetic Vectors ; Humans ; Male ; MicroRNAs ; physiology ; Polycomb Repressive Complex 2 ; genetics ; metabolism ; Prostatic Neoplasms ; metabolism ; RNA, Messenger ; metabolism ; Transfection

Objective To observe the long term effects of arthroscopic knee debridement and reconstructing operation for treating osteoarthritis in patients with Kaschin-Beck disease. Methods Thirty-one cases of patients with Kaschin-Beck disease were followed for 6 years after operation of articular clearing by arthroscope. Index of pain, symptoms of self-evaluation, range of motion, walking distance, standing test by affected leg when bending at 30° or 60° were recorded and compared with the preoperative results. Results Twenty-four cases were followed up for 6 years. Six years after operation the pain index(3.38 ± 2.87) was dramatically decreased compared to that before operation (6.88 ± 1.45, t = 5.30, P ＜ 0.05). Patients symptoms markedly improved by subjective self-evaluation was 70.83% (17/24), the effective rate was 100% (24/24). The number of cases that could stand up when leg bending at 30° or 60° were 21,18 cases, respectively, compared with that of preoperative of 14, 11 cases, respectively, the difference was statistically significant(x2 = 5.17,4.27, all P ＜ 0.05). Six years after operation the walking distance(3 cases ＜ 1 km, 11 cases 1 - 5 km and 10 cases ＞ 5 km) were greatly improved compared to the results before operation (12 cases ＜ 1 km, 9 cases 1 - 5 km and 3 cases ＞ 5 km, U = 2.88, P ＜0.05). Six years after operation the knee activity[(132.25 ± 14.52)°] remained at the same level, compared with that of preoperative [(131 .58 ± 14.68) °], the difference was not statistically significant (t = 0.16, P ＞ 0.05) .Conclusions The method of arthroscopic joint debridement to cure Kaschin-Beck disease knee osteoarthritis can significantly reduce pain, improve function and walking distance, with more stable long-term satisfactory outcome.

Mammalian cells are prone to apoptosis when cultured in large scale for production of biopharmaceuticals. And this will reduce production duration and result in high cost of production. Apoptosis is triggered by various factors, and delicately regulated by a set of genes. Bcl-2, a component integrated in mitochondria membrane, is an important member of these genes. By maintaining the integrity of mitochondria membrane, Bcl-2 keeps cytochrome C from releasing into cytoplasm, and thus blocks the activation of caspases, and subsequent onset of apoptosis. Over-expression of Bcl-2 has proven to be useful in blocking apoptosis in various cell lines, including CHO, hybridoma, myeloma, lymphoma and insect cells. Ammonia, a metabolite of cultured cells, however, showed apparent pro-apoptosis activity. In living cells, ammonia can be utilized by glutamine synthetase (GS) to synthesize glutamine, and thus lower the concentration of ammonia in medium, and its negative effects. Glutamine is essential to living cells. If not added into medium, glutamine can only be synthesized by GS, which makes GS a qualified selection marker. This marker can be used for gene amplification by adding into medium increased concentration of MSX, an inhibitor of GS. In this study, we over-expressed Bcl-2 using GS amplification in a recombinant CHO cell line stably expressing human interferon-beta. The modified cell line, with higher expression of Bcl-2 and lower production of ammonia, exhibited good anti-apoptosis quality and higher interferon-beta production in continuous culture.
Animals ; Apoptosis ; genetics ; physiology ; Biopharmaceutics ; CHO Cells ; cytology ; metabolism ; Cricetinae ; Cricetulus ; Glutamate-Ammonia Ligase ; genetics ; metabolism ; Interferon-beta ; metabolism ; Models, Genetic ; Proto-Oncogene Proteins c-bcl-2 ; genetics ; metabolism

OBJECTIVEIn order to accumulate experiences for improving the efficiency in serological tests, the present study on mixed testing of serum samples was performed by taking the serological test of trichinellosis and toxoplasmosis as the examples, and had proved the effects on cost-effectiveness of seroepidemiological survey of parasitic disease with method of mixed-samples test.

METHODSAccording to the binomial distribution principle, to develop an approach to the feasibility of mixed testing of serum samples, and to work on a cost-effectiveness analysis of one-by-one testing and mixed testing using hygienic economic analysis method was performed. For serological test of trichinellosis and toxoplasmosis, 3 kinds of mixed testing methods, namely 3 serum sample mixture, 5 serum sample mixture and 10 serum sample mixture, were performed.

RESULTSThe results showed that all the 3 kinds of mixed tests of trichinellosis and toxoplasmosis showing positive result if only 1 weak positive serum sample were mixed with. When the serum samples being mixed were all negative ones, then among the 24 groups tested with each kind of negative serum sample mixture of trichinellosis (3 serum samples, 5 serum samples and 10 serum samples), they all showed negative. However, among the 12 groups tested with 2 kinds of negative serum mixture of toxoplasmosis (3 serum samples and 5 serum samples), all showed negative while among the 18 groups tested with the 10 serum sample mixture, 16 groups showed negative and 2 were positive. The mixed testing of trichinellosis and toxoplasmosis showed that the efficiency of mixed testing was related to the serological positive rate of the parasitic diseases to be examined. When serological positive rate was 10%, the efficiency of mixed testing was higher in 4 serum sample group. When serological positive rate was 1%, the efficiency of mixed testing was higher in 10 serum sample group and when serological positive rate was 0.1%, the in crease of the size of mixed serum samples could decrease the number of testing, but the prerequisite was that there must be one positive sample, so that the positivity for all the mixed tests could be detected. If mixed testing were performed on all negative samples, no positivity could be detected.

CONCLUSIONThe result of cost-effectiveness analysis demonstrated that for seroepidemiological survey of parasitic diseases, the cost for mixed testing was low, especially when the serological positive rate was expected low (< or = 1%, thus the mixed testing could save a large amount of the cost.

Cost-Benefit Analysis ; Data Collection ; Humans ; Seroepidemiologic Studies ; Specimen Handling ; Toxoplasmosis ; diagnosis ; epidemiology ; Trichinellosis ; diagnosis ; epidemiology

OBJECTIVETo examine Clonorchis sinensis infection in China and evaluate the effectiveness of efforts to prevent and control it, two nationwide surveys were undertaken in 31 provinces, autonomous regions, and municipalities (PAMs) during 1988-92 (the 1990 survey) and during 2001-04 (the 2003 survey).

METHODSDuring the period 2001-04, two sampling methods were applied. The first method repeated the stratified cluster random sampling used in the 1990 survey; the second method applied two-characteristic stratified cluster random sampling in 27 PAMs-the 2003 endemic area (EA) survey. The Kato-Katz thick smear method was used for the nationwide survey.

RESULTSThe infection rates of Clonorchis sinensis in the 1990 and 2003 surveys were 0.311% and 0.579%, respectively. The infection rate was 2.40% in the 2003 EA survey, and it was estimated that 12.49 million people in China were infected with Clonorchis sinensis.

CONCLUSIONThe 2003 survey showed that the standardized infection rate of Clonorchis sinensis increased by 74.85% compared with the 1990 survey. The infection rate in males was higher than in females; the infection rate among people eating raw fish or eating out frequently was higher than among those who did not.

Animals ; China ; epidemiology ; Clonorchiasis ; epidemiology ; parasitology ; Clonorchis sinensis ; isolation & purification ; Cluster Analysis ; Female ; Health Surveys ; Humans ; Male

Chinese hamster ovary cells (CHO) are preferable to prokaryotic, yeast or insect cells as hosts for biopharmaceutical production due to the products are more similar to their natural conformation. However, CHO cells confront tremendous difficulties when cultured in large scale such as mal-adaptation to serum-free medium, apoptosis and over-growth without limitation. So in addition to optimizing CHO system in respect of medium, environment and expression vector, modification of CHO cells themselves has drawn more and more attention. Here the main progress in CHO-modification is reviewed.
Animals ; Apoptosis ; genetics ; CHO Cells ; drug effects ; metabolism ; Cell Cycle ; drug effects ; Cell Cycle Proteins ; drug effects ; Cell Division ; drug effects ; Cricetinae ; Genetic Vectors ; genetics ; Transfection

OBJECTIVETo explore the clinical characteristics, diagnosis and surgical treatment of adult congenital bronchoesophageal fistula.

METHODSEleven cases of adult congenital bronchoesophageal fistula that were diagnosed and surgically treated between May 1990 and August 2010 had been reviewed. There were 7 male and 4 female patients, ranging in age from 28 to 66 years (mean 48.7 years). The chief clinical presentation included coughing and sputum in 10 cases, recurrent bouts of coughing after drinking liquid food in 6 cases, hemoptysis in 6 cases, low fever in 4 cases, chest pain in 3 cases. The duration of symptoms before diagnosis ranged from 5 to 36 years (mean 16.8 years). The diagnosis of bronchoesophageal fistula was confirmed most by esophagography. Associated diseased lung was resected in all patients (lobectomy in 10 cases and pneumonectomy in 1 case). The operation included right thoracotomy in 7 cases and left thoracotomy in 4 cases. The fistula was completely resected in 10 cases. The tract was simply divided and the end was sutured in 1 case.

RESULTSThe postoperative course was uneventful in 10 patients who were discharged from hospital 10 to 18 d after operation. One patient suffered from esophageal fistula and received second operation. Regular follow-up was conducted on all 11 patients, proving that 3-year survival rate was 11/11 and 5-year survival rate was 9/11.

CONCLUSIONPersistence of congenital bronchoesophageal fistula into adulthood is rare. The main symptom is nonspecific coughing and bouts of coughing after drinking liquid food. The most useful diagnostic method is the esophagography. Even though it is benign disease, life-threatening complications might occur and it must be treated surgically as soon as the diagnosis is established.

Adult ; Aged ; Bronchial Fistula ; congenital ; diagnosis ; surgery ; Esophagoscopy ; Female ; Humans ; Male ; Middle Aged ; Retrospective Studies ; Survival Rate ; Thoracotomy

AIMTo investigate the relations between left ventricular hypertrophy and systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial pressure (MAP), neuropeptide Y (NPY) during cardiac hypertrophy and regression.

METHODSBlood pressure and heart rate were recorded with polygraph channel biologic message system. NPY in plasma and myocardium were measured with Radioimmunoassay. Correlation coefficient were calculated with SPSS software.

RESULTSThere were positive correlations between SBP, DBP, MAP, NPY in the cardiac tissue and cardiac coefficient (LVW/BW). There was no correlations between cardiac coefficient and heart rate (HR), NPY in plasma.

CONCLUSIONHypertension is one of cardiac hypertrophy factors, SBP correlate better with LVW/ BW than DBP. SBP, DBP, MAP, NPY in cardiac tissue has correlative tendency with LVW/BW.

Animals ; Blood Pressure ; Heart Rate ; Hypertension ; metabolism ; physiopathology ; Hypertrophy, Left Ventricular ; metabolism ; physiopathology ; Male ; Neuropeptide Y ; metabolism ; Rats ; Rats, Wistar

UNLABELLEDTo study the effects of Bupivacaine and hyaluronidase on the proliferation of adult rat muscle satellite cells in vivo.

METHODSImmunohistochemistry, hematoxylin and eosin staining, electron micrograph were used.

RESULTS(1) There are few rare desmin positive satellite cells lie in the myofibers of control group and Sterile saline group which are still continual. MMD of control and Sterile saline group is 0.66% +/- 0.57% and 2.48% +/- 1.13% respectively. Sterile saline group has no significant difference than that of the control (P > 0.05). (2) The myofibers of hyaluronidase group are basically continual. The number of desmin positive satellite cells are increased. MMD of Hyaluronidase is 2.52% +/- 1.41% which has no remarkable difference than that of the Sterile saline (P > 0.05). (3) Plentiful necrosis and degeneration myofibers can been seen in Bupivacaine group and Hyaluronidase + Bupivacaine group coinciding with the activation and proliferation of muscle satellite cells. The number of Desmin positive satellite cells are increased significantly and some of which have formed myotubes. MMD of Bupivacaine and Hyaluronidase + Bupivacaine is 19.01% +/- 4.74% and 22.41% +/- 7.64% respectively which have significant change than that of Sterile saline (P < 0.01).

CONCLUSIONThe local anaesthetic Bupivacaine can induce the significant proliferation of myoblasts and the formation of myotubes in vivo. Hyaluronidase has no significant effect on the proliferation of satellite cells in vivo under this experimental condition.

Animals ; Bupivacaine ; pharmacology ; Cell Proliferation ; drug effects ; Hyaluronoglucosaminidase ; pharmacology ; Male ; Rats ; Rats, Wistar ; Satellite Cells, Skeletal Muscle ; drug effects