Selective COX-2 inhibitors can promote the apoptosis of tumor cells and block the growth of new blood vessels through the inhibition of ring oxidase,vascular endothelial growth factor,microvessel and so on. Research shows that COX-2 is overexpressed in vascular and endothelial cells of lung cancer,select COX-2 inhibitors to adjuvant chemotherapy,not only can directly inhibit the tumor proliferation,but also can reduce the adverse reaction of chemotherapy drugs,and enhance the curative effect. To investigate the effects of selec-tive COX-2 inhibitors and cisplatin in lung cancer angiogenesis and its mechanism,will be a hope for the clini-cal treatment of tumor.

COX-2 is the inducible form of cyclooxygenase,which is overexpressed in non-small cell lung cancer,especially in the adenocarcinoma,and is involved in the production of lung cancer drug resistance, reducing the sensitivities of tumor cells to chemotherapy drugs. COX-2 inhibitors have the effects of antitumor and prevention of tumor formation. Therefore,in order to reverse the drug resistance of tumor cells,improve the sur-vival rate and the prognosis of patients with tumor,the application of COX-2 inhibitors as adjuvant chemotherapy and combined with chemotherapy drugs has become a new direction in the treatment of lung cancer.

BACKGROUND:Aortic root homograft has been widely used, but it stil has a high incidence of calcification and degeneration after operation.
OBJECTIVE:To investigate the alteration of biological and immunological properties of rabbit aortic root homograft treated with de-endothelialization and decellularization methods, and to find a better decellularization method.
METHODS:Aortic root homografts obtained from rabbits were randomly divided into fresh group, de-endothelialization group, and decellularization group. The morphology of homografts was evaluated by hematoxylin-eosin, Masson and VG stainings. The biological properties such as thickness, tensile strength, broken extension rate, and heat shrinkage temperature were detected. The immunological features (inflammatory cellinfiltration, calcium content and CD152 expression) were determined with immunohistochemistry and flame atomic absorption spectrometry.
RESULTS AND CONCLUSION:As demonstrated in morphological observation, protocols of de-endothelialization and decellularization methods we used attained our desired aim of decellularization perfectly. Tensile strength and broken extension rate of decellularization group were decreased significantly compared with fresh group (P<0.01), while the difference between de-endothelialization group and fresh group was not significant (P>0.05). Hematoxylin-eosin staining showed that, inflammatory reaction was the most apparent in fresh group, showing a large amount of inflammatory cells infiltration;compared with fresh group, inflammatory reaction was significantly attenuated in de-endothelialization group, the number of inflammatory cells was significantly decreased. The inflammatory reaction was the lowest in the decellularization group, only inflammatory cells infiltrated the tissue edge. Immunohistochemistry showed that, CD152 expression was significantly increased in de-endothelialization and decellularization groups compared with fresh group (P<0.05). Calcium content in de-endothelialization and decellularization groups was significantly decreased compared with fresh group (P<0.05). It could be concluded that the immunogenicity of de-endothelialized and decellularized aortic homografts is decreased significantly, and the de-endothelialization method could better maintain the tensile property.

Type 2 diabetes(T2DM) is the collective result of insulin resistance in both muscle and liver andβ cell function failure. Traditional pharmaceutical therapy fails in ceasing progressive decline in β cell function. Bariatric surgery has been widely accepted as an efficient measure to treat diabetes. However, the prevalent standards mainly based on body mass index can not meet the demand for promoting remission rate. Related factors should be included in prediction of post-operative remission, like end-point setting, T2DM status, biochemical index, and operative method etc. The combination of these factors can be used to benefit more patients with diabetes.

Accidents, Traffic ; mortality ; prevention & control ; statistics & numerical data ; China ; epidemiology ; Humans ; Prevalence ; Survival Rate

Objective:To evaluate the efficacy and safety of itraconazole in the treatment of fungal infection in the patients with hematological malignancies.Method:53 patients with malignant hematologic diseases were divided into three groups:empirical treatment group, suspected fungal infection group and established group.Itraconazole was given in a dose of 200mg twice daily in the first and the second days, from the third day in a dose of 200mg once daily.Response was established as normalization of temperature in the patients receiving itraconazole, and disappearance of clinical signs in the patients with suspected or established infection.Result:The 31 patients were eligible for efficacy evaluation for empirical treatment,and 25 responded to itraconazole(80.65%);of 9 established patients,6 responded to itraconazole(66.67%);of 13 suspected infection patients, 10 responded to itraconazole(76.92%).As to the side effects, there were no rigor and fever, but hepatotoxiciy were present in 5.66%, and no nephrotoxicity.Conclusion:Itraconazole is a highly effective drug with low side effects in treatment of fungal infections.But the hepatic and renal function tests must be carried out regularly when itraconazole infection is used.

Objective To explore the effects of dopamine and dobutamine on thyroid stimulating hormone(TSH),total thyroxine(T4) and growth hormone(GH) in preterm infants with hypotension.Methods Forty-seven preterm infants with hypotension were enrolled in the stu-dy,and 38 preterm infants remained hypotensive after two dose of isotonic saline solution,who were divided into two groups and assigned to receive dopamine or dobutamine.Drug infusion were all started at 4 ?g /(kg?min) and the dose increased by 2 ?g /(kg?min) in a stepwise fashion until either the mean blood pressure normalized or a maximal dose 20 ?g /(kg?min) was reached.Haemodynamic variables and se-rum levels of TSH,T4,and GH were assessed during the first 72 h of treatment and the first 3 d after stopping treatment.Microplate luminometer was used to test TSH,T4,GH levels.Results Necessary cumulative and mean drug doses and maximum infusion required to normalize blood pressure were significantly higher in the dobutamine group than those in the dopamine group(Pa0.05].Conclusions Dopamine and dobutamine both increase the syste-mic blood pressure,with higher drug doses in dobutamine group.Dopamine reduces levels of serum TSH,T4 and GH in preterm infants but such suppression is quickly reversed after treatment is stopped.

Medicine, Chinese Traditional ; Periodicals as Topic ; Translations

Objective To explore influence of different positive end expiratory pressure(PEEP)level on ventilative efficincy of premature infant with respiratory distress syndrome(RDS).Methods Forty preterm infants who were diagnosed RDS and needed ventilation were randomly assigned to lower PEEP(0.49~0.59 kPa)and high PEEP(0.59~0.78 kPa)group.They were treated by ventilation and pulmonary surfactant(PS).When they were medically stable,blood gas was done at 15 min,2,6,12,24 h after ventilation.Then the ratio of pa(O2)/FiO2,oxygen index(OI),ventilation index were calculated.Result The ratio of pa(O2)/FiO2,OI,ventilation index were better in lower PEEP group than those in high PEEP group(Pa

Objective: To close the incision of transvesical natural orifice transluminal endoscopic surgery (NOTES) with reserved sutures in pigs, and to assess the feasibility and safety of the technique, so as to lay a foundation for future clinical application. Methods: Five female pigs were inserted with self-made Trocar into the bladder under general anesthesia. Guided by ureteroscope, the needle passed the top wall of the anterior bladder and reached the abdominal wall, with two suture ends reserved for closure, one at the abdominal wall and the other in the urethra (out of Trocar). After finishing the transvesical NOTES, we pulled the suture end at the abdominal wall to the bladder and knotted outside the Trocar; then we dragged the urethra suture end to make the knot on the abdominal wall locating on the lateral wall of bladder, and then the urethral suture was knotted in Trocar and the knot was pushed to the bladder wall using a knot pushing device; finally the bladder incision was closed. The closure of the bladder incision was observed and tested with water filing method. Results: The first two cases failed due to the overweight and large size of the pigs, or because the bladder incision was to close to the bladder neck, or due to the poor quality of the suture. The procedures were successful in the following 3 pigs, with the operation time periods being 45 min, 30 min, and 25 min, and with satisfactory closure. Conclusion: Reserved suture for incision closure of transvesical NOTES procedure is safe and feasible; the technique is easy to perform and needs no special surgery devices; and it deserves further study.