K-ras gene is one of oncogenes in non-small cell lung cancer,and it can promote tumor cells growth after mutations by several signaling pathways.K-ras mutations frequently occur in lung adenocarcinoma patients with smoking history.In the present study,K-ras mutations are associated with resistence to targated therapy and may be a marker of poor prognosis in patients with non-small cell lung cancer.

Objective To explore the characteristics of prospective memory impairments in patients with Parkinson's disease (PD) at the early and middle stage. Methods Fifteen PD patients at the early and middle stage and 15 normal controls matched with age, sex, education and occupation were asked to complete event-based prospective memory (EBPM) and time-based prospective memory (TBPM) tasks. Results In the EBPM task (points), there was a significant difference between PD patients (3.93±2.69) and normal controls (6.00±2.17, t =-2.318,P <0.05). In the TBPM task(points), there was no significant difference between PD patients (3.47±1.96) and normal controls (3.80±1.70, t= -0.498, P >0.05). Conclusion The EBPM is impaired and the TBPM is relatively spared in early and middle stage PD patients.

Objective To evaluate the long-term outcomes,complications and urodynamic parameters of using tension-free vaginal tape-obturator(TVT-O)in the treatment of patients with stress urinary incontinence.Methods Preoperative and postoperative evaluations including urodynamic data and quality of life were performed for 24 patients with stress urinary incontinence who were enrolled and treated with TVT-O between May 2007 and June 2011.Results Patients completed long-term postoperative follow-up from 12 to 60 months after surgery.Twenty-one(87.5％)patients achieved long-term subjective success and 22(91.7％)achieved objective success.Surgical satisfaction and quality of life was high.Long-term postoperative abdominal leak point pressure of 23 patient was greater than 100 cm H2O,and the remaining parameters preoperative and postoperative showed no significant differences.Voiding difficulty and external reflection voding desire were the main long-term complications.Conclusions TVT-O is with few complications and high patient satisfaction.It is a simple,safe and effective procedure for treatment of patients with stress urinary incontinence.Long follow-up period is important for the comprehensive evaluation of TVT-O.Postoperative urodynamic study has significance in complications,diagnosis and evaluation.

Objective To investigate the dual-direction regulation of Tongxie Yaofang on gastrointestinal movement by studying its effect on gastrointestinal movement of mice in various functional states. Methods Adopting diarrhea model induced by rhubarb,constipation model by compound diphenoxylate and normal mice,the effect of different doses of Tongxie Yaofang on loose stool quantity,degree,diameter,diarrhea rate,loose stool incidence rate,loose stool grade,diarrhea index of every group were observed. By esta blishing hyperfunction of small intestinal function in mice by neostigimine,inhibition of small intestinal function in mice by atropine sulfate and small intestinal propellant function in normal mice,the effect of Tongxie Yaofang on intestinal movement of mice were studied. Results Tongxie Yaofang could inhibit gastrointestinal movement of diarrhea model and hyperfunction of small intestinal function in mice by neostigimine. It could promote gastrointestinal movement of constipation model and inhibit small intestinal function in mice by atropine sulfate. But it had no obvious action on natural mice and its intestinal movement. Conclusions Tongxie Yaofang has dual-direction regulation on gastrointestinal movement of mice in various functional states,which has a good agreement with formula-syndrome in traditional Chinese medicine,conforms to treatment based on syndrome differentiation.

Objective To investigate lipopolysaccharide (LPS) tolerance and its possible mechanism in experimental acute pancreatitis(AP) mice. Methods Two hundreds and ten C56BL/6J mice were randomized into normal saline(NS)+LPS group( n =105)and AP +LPS group( n =105). Both groups were subdivided into seven groups according to different dose of LPS. AP model was induced by intra- abdominal administration of cerulein (50 ?g/kg) for seven times at 1 hour interval. LPS was given 6 hours after first cerulein injection . Cerulein was replaced by NS in NS+LPS group. Ten mice in each sub- group were randomly selected to investigate mortality rate for 7 days. Another 5 mice were killed at 12 hours after the first cerulein injection. Liver, lung, kidney, pancreas and serum were reserved to evaluate pathological changes and measurement of amylase (AMS) and lactate dehydrogenase (LDH) levels. Gene expression profiles of leucocyte in NS+LPS(15 mg/kg)subgroup and AP+LPS(15 mg/kg)subgroup were studied with oligonucleotide microarrays of 12 479 full length mouse genes respectively for three times to screen the different genes between two groups. Results Mortality rates in both groups were increased, and correlated with the dosage of LPS. Mortality rate in AP+LPS group was significantly lower than that in NS+LPS group with the same LPS dose( P

Objective To investigate the effects of oxidized 1-palmitoyl-2- arachidonoyl-sn- glycero-3-phosphorylcholine (OXPAPC)in LPS signal pathway and acute necrotizing pancreatitis (ANP).Methods Eighty-eight SD rats were randomly divided into two groups:ANP group and ANP treat with OXPAPC group.ANP model was induced by injecting sodium taurocholate(5%)into pancreatic duct OXPAPC group was administered with OXPAPC at 0 hours and 6 hours after model establishment.Twenty rats from each group were separated to observe mortality.The others were killed at 12 hours,24 hours,48 hours and 72 hours respectively to detect serum levels of amylase and lactate dehydrogenase (LDH).Severity of pancreatitis was evaluated by histological score system.The activity of myeloperoxidase (MPO)in pancreas was determined by zymohistochemistry.Inflammatory factors mRNA hours after treated with OXPAPC were studied by semi-quantitative RT-PCP.Intracellular proteinase were investigated by western blot.EMSA was used to testify the activity of transcriptional factors.Results The mortality in OXPAPC group was significantly than that in ANP group. Serum amylase and LDH levels at significanfiy decreased the 12 hours and 24 hours after treated with OXPAPC.Histologically,OXPAPC reduced the severity of pancreatic injury including inflammatory cell infiltration and necrosis at 12 hours,24 hours,and 48 hours.There was a significant decrease of MPO activity in OXPAPC group compared to ANP group.Levels of inflammatory factors mRNA were reduced in OXPAPC group.Intracellular proteinase were down-regulated in OXPAPC group.EMSA showed that the activity of transcriptional factors weakened.Conclusion OXPAPC can block LPS signal pathway,so it can decrease the severity of ANP.

Objectives To analyze the role and mechanisms of mast cells in the inflammation and fibrosis of 2 ,4, 6-trinitrobenzene sulfonic acid (TNBS)-induced rat pancreatic fibrosis. Methods Rats were received the aseptic instillation of TNBS in ethanol via bilo-pancreatic duct, and then injected with nedocromil sodium, a mast cell stabilizer, and compound 18/80, a mast cell activator, or saline. Rats were sacrificed respectively on 3, 7, 14, 21 or 28 days. Pancreatic inflammation and fibrosis were assessed by gross and histopathological evaluation. Pancreatic fibrosis were observed by Van Gieson. Pancreatic mast cells distribution, number and their state of activation (toluidine blue) were evaluated. The activation of pancreatic stellate cells (PSCs) were assessed by the expression of a-smooth muscle actin (?-SMA) through immunohistochemistry. The expression of angiotensin Ⅱ AT1 and AT2 receptors and transforming growth factor (TGF) ? 1 raRNA, which were the factors of fibrogenesis, were also assessed. Results Typical pancreatic fibrosis changes occurred in the model of rats received TNBS at 4th week by morphological evaluation. The positive expression of ?-SMA and TGF?1 in the pancreatic tissues were detected at day 3, especially at 4th week. The expression of angiotensin Ⅱ AT1 and AT2 receptors mRNA increased gradually in all the three groups, also especially at 4th week. Compared to the control group, there were more higher expression of ?-SMA, TGF?1, angiotensin Ⅱ AT1 and AT2 receptor in the compound 48/80 group, while there were lower expression of these proteins in the nedocromil group. Conclusions Mast cells are involved in TNBS-induced pancreatic inflammation and fibrosis in rats. After being activated, mast cells will promote the activation and proliferation of PSCs and upregulate the expression of angiotensin Ⅱ AT1 receptor and AT2 receptor, and then lead to pancreatic fibrosis gradually.

Objective To observe and classify the characteristics of optical coherence tomography (OCT) for several common diseases which could lead to submacular choroidal neovascularization (CNV), and to provide the warrant to make the differential diagnosis and treatment of CNV. Methods The data of OCT of 165 patients (187 eyes) with CNV due to AMD, CEC, high myopia and ICNV diagnosed by fundus photography and fundus fluorescein angiography (FFA) were retrospectively analyzed, and the images of OCT were classified considering the results of FFA, and the characteristics of different types of the images were sumerized. Results Well-defined fusiform thickening of retinal pigment epithelial (RPE) and choriocapillary layer in CNV with well-defined border (60 eyes), dispersed backscattering increase in poorly-defined CNV (101 eyes), optic darkspace beneath RPE layer in serous detachment of RPE layer (19 eyes), quickly decreased high backscattering region under RPE layer in hemorrhagic detachment of RPE layer (11 eyes), slight to moderate backscattering region between RPE layer in fibrovascular detachment of RPE layer (10 eyes), and detachment of neurepithelial layer from RPE layer with the optic darkspace between the layers in detachment of neurepithelial layer (45 eyes) were observed. Conclusions The images of OCT for the common diseases which could lead to submacular choroidal neovascularization may be divided into 6 types. Analyzing the characteristics of images of OCT is helpful in differential diagnosis and treatment of CNV.

Objective To investigate the effect of triamcinolone acetonide (TA) with different dosage and excipient on retina. Methods Thirty-two purebred New Zealand white rabbits randomly divided into 4 groups underwent intravitreous injection with TA. Group 1:4 mg TA without excipient; group 2:25 mg TA without excipient; group 3:4 mg TA with excipient; group 4:25 mg TA with excipient. Electroretinography (ERG) was performed on each rabbit before intravitreal injection, 1 week, 1 and 2 months after the injection. All the animals were killed and the eyeballs were extirpated 2 months after the injection, and pathological examinations including light and electron microscopy were performed. Results No significant difference was found in the latent period of ERG at the points of time before and after the injection in all the groups, but the amplitudes of ERG waves was lower in groups containing excipient than that before the treatment (P

Objective To summarize early complications and treatment after regional pancreatectomy for periampullary carcinoma. Methods Clinical data of 325 periampullary carcinoma cases in our hospital from Dec 1997 to Jul 2004 were collected. Postoperative early complications were analyzed. Results There were 109 cases from Dec 1997 to Dec 2001 and 216 cases from Jan 2002 to Jul 2004. Early complications rate were 21/109( 19. 3% ) and 18/216(8. 3% ) respectively (P