ABSTRACT
@#Objective To explore the timing and safety of limited-period lung cancer surgery in patients with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Methods Clinical data of of patients infected with COVID-19 undergoing lung cancer surgery (an observation group) in the Department of Thoracic Surgery of Guangdong Provincial People's Hospital, the Department of Thoracic Surgery of General Hospital of Southern Theater Command of PLA, and the Department of Cardiothoracic Surgery of the First Affiliated Hospital of Guangdong Pharmaceutical University from December 2022 to January 2023 were retrospectively analyzed and compared with patients who underwent surgery during the same period but were not infected with COVID-19 (a control group), to explore the impact of COVID-19 infection on lung cancer surgery. Results We finally included 110 patients with 73 patients in the observation group (28 males and 45 females at age of 52.62±12.80 years) and 37 patients in the control group (22 males and 15 females at age of 56.84±11.14 years). The average operation time of the observation group was longer than that of the control group, and the incidence of anhelation was higher than that of the control group (P<0.05). There were no statistcal differences in blood loss, length of hospital stay, moderate or above fever rate, degree of cough and chest pain, or blood routine between the two groups. Conclusion It is safe and feasible to perform lung cancer surgery early after recovery for COVID-19 patients with lung cancer.
ABSTRACT
Objective To evaluate the effects of exendin-4 on glial brillary acidic protein (GFAP ) and interleukin-1β(IL-1β) expression in hippocampi of aged rats .Methods Forty-eight healthy male Sprague-Dawley rats ,aged 22-24 weeks ,weighing 500-700 g ,were randomly divided into 4 groups (n=12 each) using a random number table:control group (group C ) ,exendin-4 group (group E ) ,operation group (group O ) and exendin-4 plus operation group (group OE) .The rats were anesthetized with intraperitoneal fentanyl and droperidol .Groups C and E did not receive anesthesia or splenectomy .In O and OE groups ,splenectomy was carried out .In E and OE groups , exendin-4 5 μg/kg was injected intraperitoneally at 30 min before skin incision and 12 h after operation .C and O groups received the equal volume of normal saline instead of exendin-4 .Learning and memory function was assessed using Morris water maze test (escape latency (EL) and total swimming distance (TSD) at 1 day before operation (T0 ) .The fasting blood glucose was measured after anesthesia (T1 ) ,at the end of operation (T2 ) and on postoperative day 1 (T3 ) .The rats were sacrificed after assessment of the cognitive function at T 3 and the hippocampi were removed for determination of the expression of GFAP (by immuno-histochemistry ) and IL-1β(by Western blot ) .Results There was no significant difference in the EL and TSD at T0 between the four groups ( P>0.05) .Compared with group C ,the EL and TSD were significantly prolonged at T3 and fasting blood glucose was increased at T2 ,3 ,and the expression of IL-1βand GFAP was up-regulated at T3 in O and OE groups ( P<0.05) .Compared with group O ,the EL and TSD were significantly prolonged at T3 and fasting blood glucose was decreased at T2 ,3 ,and the expression of IL-1βand GFAP was down-regulated at T3 in group OE ( P<0.05) . Conclusion Exendin-4 can improve the postoperative cognitive function of aged rats by inhibiting inflammatory responses in hippocampi and maintaining stable perioperative blood glucose .
ABSTRACT
Objective To evaluate the role of nodal gene modulating malignancy of a hepatocellular carcinoma cell lines SMMC7721. Methods To silence the expression of nodal gene in human hepatocellular carcinoma cells by RNA interference ( RNAi),and to observe the effect on cells biological behaviour and vasculogenic mimicry.4 expression vectors of nodal gene targeting small interference RNA were constructed and transfected into SMMC-7721 cells.Real-time quantitive PCR and Western blot were used to examine nodal gene expression. The effects of nodal gene RNA interference on proliferation,apoptosis,infestation,migration and vasculogenic mimicry of SMMC-7721 were studed. Results The expression of nodal gene was suppressed in SMMC-7721 cells by RNA interference.In the first 4,5,6 days of proliferation experiment,the proliferation of interference group was significantly lower than the control group(separately F =17 098.922,18 135.107,32 641.075,all P ＜ 0.05 ); 48 h after transfection,the apoptosis rate of interference group was significantly higher than the control group (F =1136.452,P ＜0.05); In the infestation and migration experiments,the cells through the transwell chamber in the interference group were less than the control group( separately F =83.6,1126.857,all P ＜ 0.05 ) ; 24 h and 48 h after transfection,the vasculogenic mimicry in the interference group did not form which was significantly different from the control group. Conclusions Interfering the expression of nodal gene inhibits the malignant biological behaviour and the formation of vasculogenic mimicry in human hepatocellular carcinoma cells.
ABSTRACT
Blood transfusion in liver surgery still plays an important role.However,blood transfusions may cause immunosuppression recipients and hinder the body' s immune response against the tumor,promotes tumor metastasis and recurrence.How to resolve this contradiction? We must study and research the effects of allogeneic blood transfusion on liver cancer metastasis and recurrence after hepatic resection,and to find strategies to improve the liver cancer prognosis.
ABSTRACT
The surface properties and structures of a cationic Gemini surfactant with a rigid spacer, p-xylyl-bis(dimethyloctadecylammonium bromide) ([C(18)H(37)(CH(3))(2)N(+)CH(2)C(6)H(4)CH(2)N(+)(CH(3))(2)C(18)H(37)],2Br(-), abbreviated as 18-Ar-18,2Br(-1)), at the air/water interface were investigated. It is found that the surface pressure-molecular area isotherms observed at different temperatures do not exhibit a plateau region but display an unusual "kink" before collapse. The range of the corresponding minimum compressibility and maximum compressibility modulus indicates that the monolayer is in the liquid-expanded state. The monolayers were transferred onto mica and quartz plates by the Langmuir-Blodgett (LB) technique. The structures of monolayers at various surface pressures were studied by atomic force microscopy (AFM) and UV-vis spectroscopy, respectively. AFM measurements show that at lower surface pressures, unlike the structures of complex or hybrid films formed by Gemini amphiphiles with DNA, dye, or inorganic materials or the Langmuir film formed by the nonionic Gemini surfactant, in this case network-like labyrinthine interconnected ridges are formed. The formation of the structures can be interpreted in terms of the spinodal decomposition mechanism. With the increase of the surface pressure up to 35 mN/m, surface micelles dispersed in the network-like ridges gradually appear which might be caused by both the spinodal decomposition and dewetting. The UV-vis adsorption shows that over the whole range of surface pressures, the molecules form a J-aggregate in LB films, which implies that the spacers construct a pi-pi aromatic stacking. This pi-pi interaction between spacers and the van der Waals interaction between hydrophobic chains lead to the formation of both networks and micelles. The labyrinthine interconnected ridges are formed first because of the rapid evaporation of solvent during the spreading processes; with increasing surface pressure, some of the alkyl chains reorient from tilting to vertical, forming surface micelles dispersed in the network-like ridges due to the strong interaction among film molecules.
ABSTRACT
AIM: To investigate the effects of the selective mitochondrial ATP-sensitive K+ channels opener diazoxide on mitochondrial respiratory function and enzyme activity in isolated rat myocardium under ischemia/reperfusion.METHODS: Observation was made on rat hearts perfused with Langendorff apparatus.72 Sprague-Dawley(SD) rats were randomly divided into 4 groups: normal group(NOR),ischemia reperfusion(IR),diazoxide group(DIA) and 5-hydroxydecanoate(5-HD) antagonized diazoxide group(5HD-DIA).Hearts isolated from SD rats were mounted on a Langendorff apparatus and started with a 20 min perfusion for equilibration.NOR went on perfusion for another 100 min after equilibration.IR underwent 40 min global ischemia and followed by 30 min reperfusion after 30 min stabilization.DIA was administered with K-H solution containing diazoxide at concentration of 50 ?mol/L for 10 min before ischemia and reperfusion.5HD-DIA was infused with 100 ?mol/L 5-HD(a specific mitochondrial ATP sensitive K+ channel blocker) and the same procedure was carried out as DIA group.Hearts were taken down to extract mitochondrial at the end-equation,before ischemia and at the end-reperfusion for determination of mitochondrial respiratory function and the enzyme activity of mitochondria.RESULTS: At the end of reperfusion,mitochondrial respiratory function(mitochondrial respiratory control rate,P/O ratio and state 3 respiration) and mitochondrial enzyme activity(NADH oxidase,succinate oxidase and cytochrome C oxidase) in DIA group were better than those in IR group and 5HD-DIA group(P0.05).CONCLUSION: Preconditioning with mitochondrial ATP sensitive potassium channel opener,diazoxide,protects rat heart mitochondria against ischemia-reperfusion injury.The mechanisms are involved in the safeguarding of respiratory function and activity of enzymes of respiratory chain.
ABSTRACT
Objective:To investigate the clinical efficacy of deliberate hypotension with remifentanil in endovascular treatment of intracranial aneurysms.Methods:A total of 30 cases of intracranial aneurysms,were divided according to the condition of combined with hypertension,into control group(Group C) and hypertension group(Group H),each with 15 cases.Two groups adopted induction of anesthesia in patients with intravenous propofol 1.5～2mg/kg,remifentanil 1?g/kg,vecuronium 0.1mg/kg.Maintenance of anesthesia:propofol 3~5mg/(kg?h) and remifentanil 0.2～0.4?g/(kg?min),and intermittent intravenous injection of vecuronium 0.06mg/kg maintained muscle relaxation.When controlled hypotension was needed,the infusion of remifentanil to accelerated 0.8?g/(kg?min).Heart rate and blood pressure were recorded at baseline,after anesthesia induction,on tracheal intubation,before intracranial aneurysm embolism,after intracranial aneurysm embolism and extubation.Results:After induction of anesthesia,there were obvious decline in blood pressure and heart rate in both group(P
