We adhere to the scientific development concept,innovate teaching supervision mode, improve teaching supervision system ,open up the working thought of focusing on guidance in combination with supervision,foster people-oriented supervision concept and expand the content of teaching supervision. The reform and innovation of implement teaching supervision in the university have only played an extremely important role in changing the study style,teaching style,management style and some other important aspects which affect undergraduate education quality but also helped enhance the teachers` awareness of ethics teaching quality and professionalism and comprehensive improve the teaching quality.

Objective To investigate the effect of escharectomy on rats' pulmonary NF-?B activation and the expression of pulmonary proinflammatory cytokines in early stage of burn injury.Method Wistar rats were randomly divided into three groups:group A(control group),group B(postburn without escharectomy),group C(escharectomy at early stage of burn injury).Thermal-injuried rats underwent 35% TBSA full-thickness burns. Activation of pulmonary NF-?B at 12 hours and 24 hours postburn was tested by electrophoretic mobility shift assay (EMSA),and at the same time expressions of pulmonary TNF-?mRNA were measured by reverse transcription polymerase chain reaction(RT-PCR)and release of pulmonary TNF-?were assayed by enzyme-linked immunosorbent assay(ELISA).Results Compared with control group,activity of pulmonary NF-?B in group B was markedly increased,reached(19.56?1.36)?10~4 A at 12 hours and(15.23?1.94)?10~4 A at 24 hours,which was higher than that in group A[(4.36?0.38)?10~4 A,P

OBJECTIVETo investigate the change of the subfractions in existence (big and small polymers) of pulmonary surfactant (PS) and their influence on the decrease in PS activity during early postburn stage.

METHODSForty rabbits were employed in the study and were randomly divided into pre-burn, 0.5 postburn hour (PBH), 2 PBH, 6 PBH and 12 PBH groups with 8 in each group. The BALF (bronchial alveolar lavage fluid) was harvested from each rabbit. The BALF samples were centrifuged, and the supernatant (small polymer) and precipitation (big polymer) were harvested for the determination of the contents of the total phospholipids, lecithin, total protein, and albumin in both polymers.

RESULTSCompared with those in pre-burn group, the above chemical contents of PS in big polymer exhibited no change after burn (P > 0.05), but the contents of albumin and total protein increased obviously in small polymer (P < 0.01). In addition, all the contents in the small polymer increased with the elapse of time. The percentage of lecithin in total phospholipids in small polymers decreased along with the passage of time. The pre-burn contents of total phospholipids, lecithin, TP, albumin, and the percentage of lecithin in total phospholipid in small polymer were (2.23 +/- 0.40),(1.54 +/- 0.11), (16.67 +/- 1.34), (3.65 +/- 0.15) mg/ml and (77.2 +/- 3.7)%, respectively. The above indices in small polymer were (3.15 +/- 0.30), (1.77 +/- 0.08), (106.59 +/- 5.50), (11.21 +/- 0.92) mg/ml and (57.2 +/- 3.5)% respectively at 6PBH.

CONCLUSIONThe ratio of small to big polymers increased obviously, which might be an important factor in inducing the decrease in PS activity during early postburn stage leading finally to pulmonary injury.

Albumins ; analysis ; Animals ; Female ; Male ; Phosphatidylcholines ; analysis ; Phospholipids ; analysis ; Pulmonary Surfactants ; metabolism ; Rabbits ; Smoke Inhalation Injury ; metabolism

OBJECTIVETo find a new and effective way for the transfection of adenovirus vectors encoding HSP70 cDNA, so as to provide another possible method in gene therapy against ischemia and cellular hypoxia after burn injury.

METHODSThe replicated defective adenovirus vectors encoding HSP70 cDNA were encapsulated. Its acid resistance and dissolution in intestinal fluid were tested in artificial gastric juice and intestinal fluid. The expression of HSP70 gene which was transfected by the microcapsules orally was detected by RT-PCR.

RESULTSThe encapsulated replicated defective adenovirus vectors were viable in vitro. They exhibited good resistant to acid (resolution ratio less than 10%) and dissolution in intestinal juice (resolution ratio higher than 50%). The HSP70 gene expression of the tested rats was significantly higher than control, but there was no difference in the quantity of HSP70 induced by sodium arsenite or adenovirus transfection through injection by vein.

CONCLUSIONThe encapsulation of adenovirus vectors can successfully keep the viability of the virus in vitro and protect the virus from harmful effect of acid and enzyme in the gastric juice. Its nice dissolution in intestinal juice should ensure its absorption by oral transfection. The expression of the HSP70 gene after oral intake of this preparation is as high as that with other traditional transfection methods. It is possible that in the future the encapsulated replication of defective adenovirus vectors encoding HSP70 cDNA can provide a safer, convenient and effective way for gene therapy for burn patients.

Adenoviridae ; genetics ; Animals ; Burns ; complications ; Capsules ; Genetic Therapy ; Genetic Vectors ; HSP70 Heat-Shock Proteins ; administration & dosage ; genetics ; Hypoxia ; etiology ; prevention & control ; Intestinal Mucosa ; metabolism ; Ischemia ; etiology ; prevention & control ; Male ; Myocardium ; metabolism ; Rats ; Rats, Wistar ; Transfection

Objective　To study the effect of acute serious smoke inhalation injury to unilateral lung on contralateral lung and the therapeutic efficacy of massive bronchoscopic lavage with saline to the primary injured bronchoalveolus at early stage after smoke inhalation on mitigating the secondary damage of the other lung and so as to confirm the therapeutic validity of lung lavage to smoke inhalation injury. Methods　Fifteen mongrel dogs were insufflated with sawdust smoke into left lung and then randomized into 2 groups. The dogs in group A were maintained intravenous glucose saline transfusion and breathed air freely for 24 h after injury. Those in group B received a massive bronchoscopic lavage with 250 ml of saline to injured lung at 1 hour after injury and then were administrated similarly to those in group A. Gas exchange function of bilateral lungs in the process were observed and pathologic and phyiopathologic changes of the lung specimen were examined after the process. Results　While the total lavaging volume was kept to 250 ml, the liquid volume remained in left lung after each operating was from 90 ml to 140 ml. All animals had a significant decline in pulmonary function after smoke inhalation injury. PaO2 in group B decreased significantly soon after the lavage and then increased gradually to exceeding that in group A. The left lung showed serious edema similarly in two groups but in right lung the water content was less, dynamic and static compliance was more in group B than in group A. Conclusion　Bronchoalveolar massive lavage at early post-injury stage to injured lung after unilateral lung smoke inhalation injury can mitigate secondary damage of the non-injured lung. Lung lavage can decrease the intensity of secondary systemic inflammatory reaction and show a therapeutic validity to smoke inhalation injury.

Objective　To investigate the existence, intensit y and persisting time of biologic activity of bronchoalveolar lavage fluid (BALF ) collected from dogs with acute severe smoke inhalation injury in early post-i njury stage. Methods　BALF was collected 1 h after the est ablishment of acute severe sawdust smoke inhalation injury in 5 dogs, and the fl uid was perfused into the lungs of Wistar rats in the amount of 5 ml/kg (gro up C). Normal saline (group A) and BALF from normal dog (group B) were perfused into the lungs of rats and served as control. The respiratory rate, PaO2, lung water content and the expanding stability of lungs in all rats were determ ined at the time points of 4,12 and 24 h after the purfusion. Results　 Compared with the rats in group A and B, the rats in group C had higher mortality, wider range in RR, higher lung water content, PaO2 decreased obviou sly and lower lung expanding stability. The rats in control groups showed sl i ght mechanic obstruction in their airways in the course of experiment. Meanwhile ，the rats in group C showed higher oxidative activities and lower total anti-o xidative activities in lung tissues. Conclusion　It is certai n that the BALF collected from dogs with acute severe smoke inhalation injury in early post-injury stage could induce obvious injury in lung structure of norma l rats, showing certain mechanic obstruction in small airways. The injuring act ivity of the BALF can be alleviated ultimately 24 h after the perfusion of the B ALF.

Objective To detect EIA factor expression in human rectal cancer and normal tissue and to determine whether it is correlated with invasion and metastasis of human rectal cancer. Methods Real- time RT-PCR was used to detect E1AF expression in matched rectal cancers and normal tissues from g6 in- patients.Results Among the 86 rectal cancer samples tested,55 cases E1AF mRNA overexpression was ob- served. The mRNA expression of E1AF in the sample group was remarkably different from that in the control group.In carcinomas,E1AF mRNA expression correlated significantly with histological type,depth of inva- sion,lymph node and distant metastasis and advanced Duke stage.Conclusion E1AF is correlated signifi- cantly with invasion and metastasis of human rectal cancer and may be an important factor in the invasion and metastasis.

OBJECTIVETo evaluate the probability of repairing the severe cleft lip and nose in one time.

METHODS35 patients were included. A revised method was presented based on the popular methods used.

RESULTSAmong 35 patients, the length of lip in two sides was equal in 33 patients, and the appearance of the nose shape was satisfactory in 31 patients evaluated by third expert group.

CONCLUSIONThe method presented in this paper could repair the abnormalities of the lip and nose effectively in severe cleft lip patients in one time and was adapted in the patients who could not be treated with serial methods because of a bad economic state.

Cleft Lip ; Female ; Humans ; Male ; Nose

Thermostable alpha-amylase from Pyrococcus furious is an important industrial enzyme in brewing and alcohol production. Eexpression of the thermostable a-amylase in plants can reduce greatly costs in the production of alcohol using crop plants. A chloroplast expression vector, p64A, containing the thermostable alpha-amylase gene from Pyrococcus furious, was constructed with clpP-trnL-petB-chlL-rp123-rpl2 as Chlamydomonas reinhardtii plastid homologous recombinant fragments and spetinomycin-resistant aadA gene as select marker. The plasmid p64A was transferred into the chloroplast genome of C. reinhardtii by the biolistic method. Nine independently transformed lines were obtained by 100 mg/L spectinomycin selection. PCR amplification, Southern blot analysis of the transgene and cultivation in the dark all showed that the a-amylase gene had been integrated into chloroplast genome of C. reinhardtii. The activity of amylase expressed in the chloroplast of C. reinhardtii was detected by amylase activity assay and found to be as high as 77.5 u/g fresh weight of cells. These experimental results demonstrated the possibility of using transgenic chloroplasts of plant as bioreactors for production of industrial enzymes.
Chlamydomonas reinhardtii ; genetics ; Chloroplasts ; genetics ; Enzyme Stability ; Plasmids ; Polymerase Chain Reaction ; Pyrococcus furiosus ; enzymology ; alpha-Amylases ; chemistry ; genetics ; metabolism

OBJECTIVETo investigate the effect of nuclear factor-kappaB (NF-kappaB) activation on the expression of proinflammatory cytokines in the lung tissues of rats with early-stage burn injury.

METHODSWistar rats were randomly divided into 3 groups, namely the normal control, burn, burn and PDTC treatment groups, and in the latter two groups, the rats were subjected to 35% TBSA full-thickness burns. Activation of pulmonary NF-kappaB at 1, 3, 6, 12, and 24 postburn hour (PBH) was tested by electrophoretic mobility shift assay , and the expressions of pulmonary tumor necrosis factor alpha (TNF alpha) and interleukin-8 (IL-8) mRNAs at 3, 6, 12, and 24 h were detected by RT-PCR.

RESULTSCompared to that of the control group, activity of pulmonary NF-kappaB in burned rats was markedly increased within 1 PBH and kept increasing till 24 h. Expressions of pulmonary TNF alpha and IL-8 mRNAs increased gradually, reaching the peak level at 6 PBH, and PDTC could effectively inhibit pulmonary NF-kappaB activation and expression of the pulmonary cytokines induced by the burn injury.

CONCLUSIONSevere burn injury may activate pulmonary NF-kappaB, which ultimately leads to secretion of cytokines in the lung tissues.

Animals ; Burns ; immunology ; pathology ; Disease Models, Animal ; Gene Expression ; Humans ; Inflammation Mediators ; immunology ; Interleukin-8 ; genetics ; immunology ; Lung ; immunology ; pathology ; NF-kappa B ; genetics ; immunology ; Random Allocation ; Rats ; Rats, Wistar ; Tumor Necrosis Factor-alpha ; genetics ; immunology