Aim Tostudytheinfluencesofsulfated polysaccharides ( SPPM60-D) on the regulation of free calcium concentration ( [ Ca2+] i ) of T lymphocytes of mice in vitro and explore the mechanisms involved. Methods Polysaccharides(PPM60)wereextracted from masson pine pollen with hot water and 60% etha-nol. PPM60-D was separated and purified from PPM60 with Sephacryl S-400HR. Sulfated polysaccharides ( SPPM60-D ) were derivated by chlorosulfonic acid-pyridine method and the [ Ca2+] i of T lymphocytes were measured by fluorescence spectrophotometer. IL-2 and IL-4 were measured by ELISA kits. Results ConAandSPPM60-Dcouldincrease[Ca2+]iinT lymphocytes by 211. 5% and 201. 8% respectively ( P<0. 01). 2-APB, LY294002, U73122 and verapamil rather than TAK-242 could significantly inhibit the in-crease of [ Ca2+] i induced by SPPM60-D. SPPM60-D could significantly increase the level of IL-2 and IL-4 in supernatant ( P <0. 01 ) . 2-APB rather than TAK-242 could significantly inhibit the increase of cyto-kines.Conclusion ItisspeculatedthatSPPM60-D could increase [ Ca2+ ] i via TCR/CD3-PI3K-PLC-IP3 R-Ca2+ signal pathway through TCD/CD3 receptor in T lymphocytes so that it could improve the level of IL-2 and IL-4 in supernatant in T lymphocytes.

Objective To compare the clinical value of nerve stimulator-versus ultrasound-guided continuous femoral nerve block for analgesia after laparoscopic surgery.Methods Forty patients,aged 18-60 yr,with body mass index of 18-30 kg/m2,of ASA physical status Ⅰ or Ⅱ,scheduled for elective laparoscopic surgery,were randomly assigned into 2 groups (n =20 each) using a random number table:nerve stimulator group (group S) and ultrasound group (group U).Epidural anesthesia was performed with 1.73 ％ carbonated lidocaine in both groups.0.2％ ropivacaine 5 ml/h was infused continuously after surgery to perform femoral nerve block for analgesia.VAS score at rest was assessed at 2,6,24 and 48 h after surgery.At 24 and 48 h after surgery,VAS scores during active and passive movement were assessed.The time for catheter placement near the femoral nerve and development of subcutaneous hematoma at the puncture site,local anesthetic intoxication and nausea and vomiting were recorded.The postoperative requirement for analgesics was also recorded.Results There was no significant difference in the VAS scores and puncture for femoral nerve block-and local anesthetics-related adverse events between the two groups.The time for catheter placement near the femoral nerve was 8.0 ± 1.4 and (6.7 ± 0.9) min in S and U groups,respectively,and the time was significantly longer in group S than in group U.No patients required rescue analgesic after surgery in both groups.Conclusion Nerve stimulator-guided continuous femoral nerve block provides higher clinical value than ultrasound-guided continuous femoral nerve block for analgesia after laparoscopic surgery and it is more suitable for clinical application.

Objective To investigate the effects of different positions of the patients mechanically ventilated under general anesthesia on respiratory mechanics during one or both lung ventilation before thoracotomy.Methods Twelve ASA Ⅰ or Ⅱ patients of both sexes (8 males, 4 females) aged 33-63 years weighing 62-85 kg scheduled for general thoracic surgery were studied. The preoperative lung function of the patients was normal. The patients were premedicated with intramuscular pethidine, promethazine and atropine. Anesthesia was induced with fentanyl, droperidol, midazolam, propofol and vecuronium. Left-sided double-lumen tube was inserted and correct placement was confirmed using a fiberoptic bronchoscope inserted through the bronchial lumen. Anesthesia was maintained with propofol and vecuronium infusion. The magnitude of neuro-muscular blockade was monitored by stimulation of radial nerve with TOF pulses. T4/T1 was maintained at 0 during study. The patients were placed in supine, left and right lateral position. In each position both lungs, left and right lung were ventilated for 10 min respectively. The non-ventilated bronchial lumen was open to the air during one-lung ventilation. The ventilatory parameters were kept unchanged during the study (VT = 8-10 ml?kg-1 , RR = 12 bpm, I:E = 1:2). Pressure-volume loop (P-V loop), peak airway pressure (Ppeak), airway resistance (Raw), total compliance (CT) (lung and thorax) and PETCO2 were measured and recorded at the end of each 10 min ventilation using S/5 monitor ( Datex-Ohmeda Finland) . Results During both lung ventilation Ppeak was significantly increased and CT was significantly decreased in left and right lateral position as compared with supine position ( P

Objective To evaluate feasibility of high frequency jet ventilation (HFJV) during trachea and carinal reconstruction. Methods Ten patients with lung cancer ,scheduled for elective trachea and carinal reconstruction ,were intubated with double lumen tube following routine anesthesia induction. A HFJV tube (ID=3mm) was inserted 3cm into main bronchus. HFJV was applied ,with the respiratory rate of 120/min,I:E=1:2 and drive pressure of 0.15-1.20MPa, after cut off the main bronchus of the opposite side. Blood gas analysis was made before the operation, 15min following one-lung ventilation, 5, 10, 20 min following HFJV and 15min following one-lung ventilation,respectively.Results PaO 2 was significantly higher following HFJV than that one-lung ventilation (P

This article summarized the advances in the research of the natural products ET-743,Didemnin B and Aplidine,which were isolated from ascidians, and have been applied to clinical study at present.

BACKGROUND: The transcription factor Runx2 is the key factor that regulates osteogenic differention and bone development. It has been reported that the C2C12 mesenchymal cells can be induced to differentiate into osteoblasts by Runx2 overexpression, but the molecular mechanism of induction is stil largely unclear. OBJECTIVE: To investigate the role of the members of the miR-376 family during Runx2-induced osteogenic differentiation in C2C12 cells. METHODS: The expression of the members of the miR-376 family was detected by real-time quantitative PCR at different time points using C2C12/Runx2Dox sub-line with conditional Runx2 expression. In miR-376b-3p-transfected C2C12/Runx2Dox cells, the expression of osteoblast markers, such as alkaline phosphatase and osteocalcin, was detected by real-time quantitative PCR, and the alkaline phosphatase activity was also examined by alkaline phosphatase staining. The putative miR-376b-3p targets were commonly predicted by online tools (miRanda, miRWalk and TargetScan). The functional classification of these putative targets was performed by DAVID Bioinformatics Resources database. RESULTS AND CONCLUSION: The expression of miR-376b-3p was significantly increased during Runx2-induced osteogenic differentiation of C2C12 cells, but the expression of other members was not changed. Transfection of miR-376b-3p mimic upregulated alkaline phosphatase expression, but had no effect on osteocalcin expression. The alkaline phosphatase activity was also increased by transfection of miR-376b-3p. The functional classification of miR-376b-3p putative targets showed that miR-376b-3p is involved in the skeleton development, indicating the role of miR-376b-3p in osteoblast differentiation. Taken together, these results suggest that Runx2 promotes early osteogenic differentiation in C2C12 cells by regulating the expression of genes related to osteogenic differentiation through upregulation of miR-376b-3p.

Objective To evaluate the predictive value of plasma atrial natriuretic peptide (ANP) level on prognostic of patients with systemic inflammatory response syndrome by dynamic monitoring ANP levels.Methods Ninety-eight patients admitted to the intensive care unite were classified into survival group(n =78) and death group (n =20).The level of plasma ANP,procalcitonin,C-reactive protein and lactic acid were measured.Acute Physiology and Chronic Health Evaluation (APACHE) Ⅱ score were recorded.Results The plasma ANP level of patients in the death group was 0.40 (0.26) μg/L,significantly higher than that in the survival group(0.22(0.12) μg/L,P =0.000).Along with treatment scheme,the plasma ANP level decreased in survival group,and there were significant difference among three times (0.22 (0.12) μg/L,0.17 (0.09) μg/L,0.13 (0.11) μg/L,P =0.000).But there was no difference in ANP level of patients in death group along with the disease developing (0.38 (0.30) μg/L,0.39 (0.23) μg/L,0.39 (0.22) μg/L,P =0.99).ICU hospitalized time in survive group associated with APACHE Ⅱ score,ANP and PCT(r =0.735,0.628,0.487 respectively,P =0.000,0.001,0.021).Conclusion ANP is proved to be a good clinical index in prognostic evaluation of patients with sepsis.

Purpose To study the polysaccharide from Pinus massoniana pollen(PPM)and to compare its anti-tumor,immune modulation activities and scavenging qualities of free radical with its sulfated derivative(S-PPM).Methods PPM Wag chemically modified by chlorosulfonic acid-pyfidine method and their bioactivities were compared.Results The substituting degree of S-PPM was 1.47.Results showed that S-PPM was more powerful in inhibiting the growth of tumor cell in vivo and in vitro and in promoting T,B lymphocytes than PPM.But there Wag no remarkable difference in promoting phagocytosis of macmphages.S-PPM was stronger in scavenging superoxide anion radical than PPM but it wag vice versa in scavenging hydroxyl radical.Conclusion S-PPM inhibited the cancer cell growth mainly through specific immunity.Sulfate of PPM influenced its quality of scavenging free radicals greatly.