Adult ; Humans ; Male ; Oils ; Pneumonia, Aspiration ; chemically induced

Objective To evaluate the diagnostic value, patients' tolerance and complications of double-balloon enteroscopy (DBE) in the diagnosis of small intestinal diseases. Methods During May 2003 to July 2005, a total of 68 patients (36 men, 32 women; mean age of 52. 6 years, range 15-78 years) with suspected small intestinal diseases were performed double-balloon enteroscopy (36 via mouth, 25 via anus and 7 via both mouth and anus according to suspected lesion location). Among them, obscure recurrent gastrointestinal bleeding was found in 39 cases, incomplete small intestinal obstruction in 7 cases, chronic abdominal pain in 14 cases, and chronic diarrhea in 8 cases. Results Approximately one half to three-fourth of the entire small intestine was observed by each approach in all cases except for 3 cases of severe intestinal stricture. The observation of the whole small intestine was finished by the combination of both oral and anal approaches in 7 cases. The appropriate use of X-ray made the enteroscopy easier and more helpful to determine the extent and location of the lesions. The lesions were found in 41 of the 68 patients, with a total positive rate of 60. 3%. The diagnostics yields was 26/39(62. 6%) in obscure recurrent gastrointestinal bleeding, 5 in incomplete intestinal obstruction, 6/14(43%) in chronic abdominal pain and 4 in chronic diarrhea, respectively. Fifty-seven cases (83. 8%) tolerated well without anesthesia while 11 cases received propofol anesthesia. No procedure-related severe adverse events or severe complications such as hemorrhage or perforation occurred in all cases. Conclusion Double-balloon enteroscopy is a well-tolerated and safe diagnostic approach with a high diagnostic yield in small intestinal diseases.

The use of flaps for plastic and reconstructive surgery is very popular today.More and more surgeons have realized that the blood supply plays an important role in the design and survival of flaps.After Ian McGregor and Ian Jackson first introduced the axial flaps into clinics,Mathes divided the flaps into two types in 1981,the fasciocutaneous perforator flaps and musculocutaneous perforator flaps.In 1989,the concept of perforator flap was first brought into clinical practice.With the development of microsurgery and anatomy,the epidermis of human skin is divided into areas based on the vascular anatomy.A new century of musculocutaneous perforator flaps has been established.The terminology,classification,characteristics and application of musculocutaneous perforator flaps are described in this paper.

Objective: To evaluate the feasibility,the safety and the effect of early postoperative enteral nutrition in patients with esophageal cancer.Methods: On the first postoperative day,40 patients were randomly divided into two groups.One group was given isocaloric total parenteral nutrition through central vein(TPN group) and the other group was fed with enteral nutrition through nasoenteric tubes or jejunostomy tubes which were inserted during the operation(EEN group).All variables were measured before operation and on postoperative day 1 and 8.Blood was drawn at different time points to assess albumin,prealbumin and transferrin.Immune response was determined by immunoglobins,total lymphocytes,T-lymphocyte subsets and NK cells. Inflammatory response were determined by C-reactive protein,IL-6 and TNF-?.Morbidity,mortality and length of hospital stay were also evaluated. Results: Tolerance of enteral nutrition was excellent.Neither mortality nor serious morbidity occurred in all patients during the period of study.After the study,the levels of serum prealbumin,total lymphocytes,CD3,CD4 and CD4/CD8 ratio in the EEN group were significantly higher than the levels in the TPN group.The concentrations of IL-6 and the length of hospital stay in the EEN group were significantly lower than in the TPN group.Conclusion: Early postoperative enteral nutrition in patients with esophageal cancer is safe,and also has the benefit effects of enhancing the body status of nutrition and immune function,and reducing the inflammatory response and the length of hospital stay.

BACKGROUND:Diabetic foot ulcers threaten the patients’ health and even survival seriously. It is an international difficult problem and lacks an effective treatment. But gene therapy and stem celltherapy possess special advantages and potential in wound healing. OBJECTIVE:To assess the therapeutic effect of transplantation of bone marrow mesenchymal stem cells transfected by human vascular endothelial growth factor 165 (hVEGF165) gene on foot wound healing in diabetic rats. METHODS:Recombinant adenovirus was established in vitro which expressed hVEGF165 gene and transfected into the third generation of bone marrow mesenchymal stem cells. Total y 120 male Wistar rats were divided into five groups:group A (non-diabetic controls), group B (diabetic controls), group C (Ad-hVEGF165 therapy), group D (stem celltherapy) and group E (transplantation of bone marrow mesenchymal stem cells transfected by Ad-hVEGF165 gene). Rats in the latter four groups were intraperitoneal y injected with streptozotocin to induce diabetic models. In al rats, a 3 mm×7 mm rectangular ful-thickness skin sample was cut from the instep of the hind foot to make a model of foot wound. The rats were subcutaneously injected at equidistant six points 5 mm distal to the wound edge on the dorsum of the foot:50μL PBS per point for group A, 50μL adenovirus suspension (1×1013 pfu/L) per point for group C, 50μL stem cellsuspension (1×1010/L) per point for group D, and 50μL adenovirus suspension+50μL stem cellsuspension per point for group E. RESULTS AND CONCLUSION:After injection, the rate of wound healing, the expression of VEGF and the qualities of capil aries in group E were higher when compared with groups B, C, D (P<0.05), but were lower than those in group A (P<0.05). Transplantation of bone marrow mesenchymal stem cells transfected by hVEGF165 gene can promote foot wound healing, angiogenesis and expression of VEGF in diabetic rats.

Objective To study the effects of Poly(I:C) on lung adenocarcinoma A549 cells viability and illuminate the mechanism of Poly (I:C)-induced apoptosis in A549 cells.Methods A549 cells were transfected with the complex of Poly(I:C) and lipofectamine 3000.The viability of A549 cells was tested by methyl thiazolyl tetrazolium (MTF) method.The apoptotic cells were tested by flow cytometry.The caspase proteins were tested by Western blotting and the expressions of interferon-β (IFN-β) and CXCL-10 were assayed by real-time PCR.After employing the pan-caspase inhibitor Z-VAD-FMK and caspase-8 inhibitor Z-IETD-FMK,the variation of Poly (I:C) proapoptosis in A549 cells was observed.RNA interfering experiments were employed to knock down melanoma differentiation related antigen 5 (MDA5) or retinoic acidinduced gene Ⅰ (RIG-Ⅰ),and the above indexes were tested.Results The viability of A549 cells was significantly reduced to 74.92％ ±--6.24％ after 200 ng/ml Poly (I:C) transfection compared with that before transfection (95.32％ ± 3.05％,t =2.883,P =0.041).The apoptotic rates induced by 100,200,400 ng/ml Poly(I:C) were 9.97％-± 0.88％,23.63％-± 1.41％,32.57％-± 2.39％,respectively.All of them were higher than that in the control group (0.74％-± 0.15％),with significant differences (t =4.489,P =0.002;t =11.616,P =0.000;t =16.932,P =0.000).Besides,the death receptor pathway proteins such as TNF-related apoptosis inducing ligand (TRAIL),cleaved-caspase-8 and cleaved-caspase-3 increased obviously.MDA5/RIG-Ⅰ pathway was also activated dramatically and the expressions of IFN-β,CXCL-10 were significantly up-regulated.The apoptotic rates reduced to 3.17％ ± 0.66％,5.35％ ± 0.64％ with pancaspase inhibitor Z-VAD-FMK and caspase-8 inhibitor Z-IETD-FMK pretreatment,compared with the control group (15.87％ ±0.93％),and the differences were statistically significant (t =8.643,P =0.001;t =6.824,P =0.002).Moreover,the expressions of TRAIL,IFN-β and CXCL-10 induced by Poly (I:C) were inhibited with MDA5 or RIG-Ⅰ depletion.Conclusion Poly(I:C) can reduce the survival rate of A549 cells and promote the apoptosis mainly by activating the death-receptor pathway mediated by MDA5/RIG-Ⅰ probably,which may involve in IFN-β,CXCL-10.

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The synchronization problem was investigated for two kinds of complex system with different structures in the present study. This paper analyses linearizing condition for the system, and gives an output function. A kind of controller based on time delay feedback (TDF) was designed, and it can achieve synchronization for complex system with different structures. By using Lyapunov Stability Theory, we proved the synchronization for the system. At last, the numerical simulation experiments were provided to further demonstrate the effectiveness of the proposed
Algorithms ; Computer Simulation ; Feedback ; Models, Theoretical ; Systems Theory ; Time

To study the relationship between the late postmortem interval (PMI) and trimethylamine-nitrogen (TMA-N) in postmortem tissues of cadaver, TMA-N in muscles, livers and kidneys of rats was measured at different postmortem intervals (PMI) by using a modified spectrophotometric method. The results indicated that the detection sensitivity of TMA-N was 1 mg/L, and there was a good linear correlation between the value of absorbance (A value) and TMA-N at the concentration of 1-10 mg/L (R (2) = 0.9991). Although TMA variation in muscles was different from that in inner organs during the time since death, TMA-N changes in cadaver tissues was positively correlated with PMI. During 2 to 7 d since death, the best correlation between PMI and TMA-N concentration was found in muscles. With PMI as an independent variable, the cubic polynomial regression equation was y= -0.457x(3)+6.519x(2)-24.574x+27.207 (R (2)=0.969). During 3 to 8 days since death, PMI was best correlated with TMA-N concentration in inner organs. With PMI as the independent variable, the cubic polynomial regression equation was y=0.509x(3)-9.153x(2)+55.727x-95.819 (R (2)=0.953). It was concluded that TMA-N in tissues could be used as a new estimator for late PMI. The method used in this study offered advantages such as accuracy, sensitivity, little samples required and wide PMI estimation.
Cadaver ; Forensic Pathology ; Methylamines/*analysis ; Nitrogen/*analysis ; Pilot Projects ; Postmortem Changes ; Random Allocation ; Rats, Sprague-Dawley ; Spectrophotometry ; Time Factors

BACKGROUND:Numerous studies have demonstrated that estrogen can regulate the proliferation and migration of endothelial progenitor cel s (EPCs), while EPCs can also promote the function and activity of bone marrow mesenchymal stem cel s (BMSCs) in vitro. OBJECTIVE:To evaluate the ability of the BMSCs and EPCs which construct the composite cel sheet in the repair of alveolar bone defect in ovariectomized rats. METHODS:BMSCs/EPCs composite sheet, EPCs sheet and BMSCs sheet were respectively implanted into the defects of the alveolar bone in ovariectomized rats. Rats with no implantation served as control group. Repaired alveolar bone was assessed by gross examination, histological observation and micro-CT scan at 2, 4, 8 weeks after operation. RESULTS AND CONCLUSION:BMSCs/EPCs composite sheet has greater osteogensis activity and bone repair capacity than BMSCs or EPCs sheet alone.