ABSTRACT
Objective To investigate the effects of controlled low central venous pressure (CLCVP) on cerebral oxygen metabolism during orthotopic liver transplantation (OLT),and study the safety of CLCVP in OLT.Method Forty-six patients subject to OLT were randomly divided into CLCVP group (CL group) and CVP group (C group).Blood samples were taken from radial artery and jugular simultaneously for blood gas analysis before operation (T1,baseline),immediately blocking inferior vena and portal vein (T2),30 min after anhepatic phase (T3),30 min after graft reperfusion (T4),2 h after graft reperfusion (T5),and 24 h after graft reperfusion (T6).Cerebral arterial oxygen content (CaO2),jugular oxygen content (CjvO2),cerebral arterial-venous oxygen content difference (Ca-jvO2),cerebral oxygen extraction rate (CERO2),and cerebral blood flow/ cerebral metabolic rate of oxygen (CBF/CMRO2) were calculated by the Fick formulae.Meanwhile,blood samples were taken from jugular simultaneously for serum creatinine (Cr) and urea nitrogen (BUN) a different time points.We also recorded the whole operation time,anhepatic phase time,volume of blood loss and transfusion,and urine volume.Results As compared with C group,CaO2,CjvO2,Ca-jvO2,SjvO2,CERO2 and CBF/CMRO2 in CL group were nearly not changed at different time pioints (P＞0.05),but in the same group,as compared with T1 and T2,the CaO2,CjvO2,Ca-jvO2 and CERO2 in T3,T4 and T5 were decreased significantly (P＜0.05),and the SjvO2 in T3,T4 and T5 was increased remarkably.The operation time and anhepatic phase time had no significant difference in both groups.As compared with C group,the volume of blood loss and transfusion in CL group were decreased (P＜0.05),and the urine volume in CL group CL was increased significantly (P＜0.05).Cr and BUN showed no significant difference in both groups and at the same time points of C group and CL group.Conclusion CLCVP can decrease volume of blood loss and transfusion,increase urine volume during OLT,and it does not change the cerebral oxygen metabolism during OLT.
ABSTRACT
Transcranial Doppler can detect the presence of microembolic signal in patients at high risk of stroke as well as in invasive cardiovascular examinations and surgical procedure.A growing number of evidence has suggested that cerebral microemboli may cause cognitive impairment.This article reviews the effects of cerebral microemboli on cognitive function.
ABSTRACT
Cisplatin, an efficient anticancer agent, can trigger multiple apoptotic pathways in cancer cell. However, the signal transduction pathways in response to cisplatin-based chemotherapy are complicated, and the mechanism is not fully understood. Using fluorescence resonance energy transfer (FRET) technique, the molecular mechanism of cisplatin-induced apoptosis in living human lung adenocarcinoma cells (ASTC-a-1) were investigated. After cisplatin treatment, the recombinant pFRET-Bid and pSCAT-3 probes were used to determine the kinetics of Bid cleavage and Caspase-3 activation, respectively. The fluorescence probes Bid-CFP and DsRed-Mit were also used to detect the spatial and temporal changes of Bid in real-time in sub-cell level. The results showed that a cleavage of the Bid-FRET probe occurring at about 4～5 h after treated with 20 ?mol/L cisplatin. Cleavage of the Bid-FRET probe coincided with a translocation of tBid from the cytosolic to the mitochondria, and the translocation lasted about 1.5 h. At the anaphase of cell apoptosis, Caspase-3 was activated obviously as detected by FRET and Western blotting techniques. Using real-time single-cell analysis, it was observed the kinetics of Bid and Caspase-3 activation for the first time in living cells during cisplatin-induced apoptosis.
ABSTRACT
<p><b>OBJECTIVE</b>To study the high-yield and high-quality cultivating technology of Plantago asiatica, adapt to the demands of GAP.</p><p><b>METHOD</b>The main factors which influenced the yield and quality in the production process of P. asiatica was studied.</p><p><b>RESULT</b>The standard system cultivating technology of high yield and quality of P. asiatica was established.</p><p><b>CONCLUSION</b>The seeds of P. asiatica can reach the objective of high yield and high quality on the basis of this cultivating technology.</p>