Objective To investigate the invasion ability and collagenolytic activity of human glioma cells in vitro.Methods Boyden chamber invasion assay was employed to evaluate the cell migration ability of human malignant glioma cell line U87MG in vitro and the effect of conditioned medium of U87MG cells on matrix collagenolytic activity was tested by agar-gelatin gel.Results The number of U87MG glioma cells migrating through the Matrigel-coated membrane was more than that of addition of EDTA or anti-MMP-2 antibody in U87MG glioma cells(P0.05).EDTA or anti-MMP-2 antibody markedly inhibited the number of the migrated cells,the inhibitory rates were 79.2% and 77.1%,respectively. The conditioned medium collected from the U87MG cells showed an increase in the transparent ring area on agar-gelatin gel.Inhibition of MMP-2 enzymatic activity by EDTA or anti-MMP-2 antibody reduced the transparent ring area on agar-gelatin gel.Conclusion Both invasion ability and collagenolytic activity of U87MG cells are depended on MMP-2,suggesting that MMP-2 plays an important role in glioma invasiveness.

Objective To summarize the experience of pituitary adenoma resection by single-nostril transsphenoidal approach and analyze the indications,intraoperative and postoperative common problems in order to improve the technique and quality of life.Methods Summarize the clinical data of 611 pituitary adenoma resections by single-nostril transsphenoidal approach from January 2005 to June 2010 retrospectively,reanalyze the choice of operative indications,analyze the bleeding during the operation and sums up the relevant pro cessing suggestions,and summarize the reasons and countermeasures of postoperative visual impairment.Results The tumors were totally removed in 538 cases,sub-resections in 59 cases,sub-totally removed in 14 cases,and no deaths.Eleven cases were poor gasification or concha sphenoid sinus in 11 totally removed patients.The bleeding came from diploe,emissarium,mucosa of sphenoid sinus,diploe,epidural space,dura matter of the sella turcica region,intercavernous sinuses,tumor or the tumor bed.The bleeding was controlled effectively with different approaches.There were 3 patients who underwent visual impairment,and the impairment was improved after treatment.Conclusion Following the correct operation principle,we can improve the rate of total resection; the single-nostril transsphenoidal approach is also suitable for the poor gasification; The prognosis can improve after deal with the intraoperative and postoperative common problems.

Objective To investigate the expression of signal transducer and activator of transcription 3 (STAT3) in colorectal car- cinoma tissues and adenomatous polyp tissues, and analyze the relationship between the expression of STAT3 and its clinicopathological pa- rameters in colorectal carcinoma tissues. Methods The protein expressions of STAT3 were detected in 40 colorectal carcinoma tissues, 30 adenomatons polyp tissues and 30 normal colorectal mucosa tissues by MaxVisionTM immunohistochemistry, and the relationship with clinical data were analyzed. Results The STAT3 protein was located mainly in cytoplasm. Positive expression rates of STAT3 protein in colorectal carcinoma tissues, adenomatous polyp tissues and normal colorectal mucosa tissues were 80.0%, 56.7% and 30.0%, respectively. The ex- pression of STAT3 protein in colorectal carcinoma tissues was higher than that in edenomatous polyp tissues (P<0.05 ). Compared with normal colorectal mucosa tissues, the positive expression rates and intensities of STAT3 protein in colorectal carcinoma tissues and adenoma- tous polyp tissues were significantly higher(P<0.05 ) . It was found that overexpreesion of STAT3 protein was related te differentiation, Dukes stage and lymph node metastasis in colorectal carcinoma ( P < 0. 05 ), and no significant differences were found between STAT3 pro- tein expression and other factors such as serosa invasion, distant metastasis , age and gender( P<0.05 ). Conclusions The overexpres- sion of STAT3 protein may play an important role in the genesis and progression of colorectal cancer. In adenomatous polyp tissues, STAT3- positive cells may be potential pre-cancerous cells. Detection of STA'r3 is helpful in accessing the malignant degree and the biological behav- ior of colorectal cancer.

Objective:To study the relation of angiogenesis with cell proliferative postenti al in human meningiomas.Methods:Expression of factor Ⅷ-related antigen (FⅧRAg) and proliferating cell nuclear antigen (PCNA) was detected by immunohistochemistry in 38 specimens of human meningiomas,including 14 benign,12 atypical and 12 anaplastic (malignant) menningiomas and the correlation of microvessel density (MVD) with PCNA labellin g index (PCNA LI) was analyzed.Results:There was no significant difference in MVD between benign and atypical m eningiomas (P>0.05).MVD was higher in analplastic meningiomas than in both benign and atypical tumors (P<0.01).PCNA LI was markedly higher in anaplast ic meningiomas than in benign and atypical tumors (P<0.01). A significant c orrelation between MVD and PCNA LI was not detected in benign tumors;whereas,MVD positively correlated with PCNA LI in both atypical (r=0.518,P<0.01) and a naplastic (r=0.358,P<0.01) meningiomas. Conclusion:Angiogenesis is linked to cell proliferative potential in both atypic al and anaplastic meningiomas.

Objective To assess the correlation of the characteristics of coronary lesion and the risk factors to the coronary heart diseases using angiography techniques. Methods Coronary heart disease (CHD) patients were divided into two groups according to the ages of patients: elderly group (67 cases, 60 88 years); non elderly group(61 cases, 25 59 yeas). Angiography was performed in all CHD patients and their risk factors were analyzed by Logistic regression. Results The coronary changes were characterized in most patients by multi vessels lesion(76 1%) in elderly group, while by single vessel lesion (54 1%) in non elderly group. Stenosis of the coronary artery in the elderly group was severer than that in the non elderly. Logistic regression showed that ageing, sex, hyperlipemia were the risk factors for CHD( P

Objective To expore the application of intraoperative neural electrophysiological monitoring in microvascular decompression (MVD)of idiopathic facial spasm (HFS), and to clarify the effect of MVD in increasing the operative efficacy of MVD and decreasing the postoperative complications.Methods From December 2010 to December 2014,163 patients with HFS received MVD were selected;from December 2010 to December 2010,73 patients with facial spasm without electrophysiological monitoring in the operation were used as control group;from January 2013 to December 2014,90 patients with facial spasm with BAEP/LSR/FN MEP monitoring in the operation were used as monitoring group.The postoperative efficiency of MVD and the occurrence of hearing loss,dizziness, facial paralysis and other complications after operation were compared between two groups. Results The immediate efficiency in monitoring group was 52.55% (47 cases), minor facial paralysis 1.11%(1 case),hearing loss and dizziness 5.56% (5 cases).The postoperative follow-up time was 6 to 12 months,an average of 9.6 months; the facial paralysis, hearing loss, and dizziness were significantly improved and the operation efficiency was 65.56% (59 cases).The Immediate efficiency in control group was 30.14% (22 cases), minor facial paralysis 13.69% (10 cases),hearing loss and dizziness 23.29% (17 cases);the postoperative follow-up time was 6 to 12 months,an average of 9.6 months;the facial paralysis,hearing loss,and dizziness were significantly improved, and the operation efficiency was 64.38% (47 cases ). The immediate surgery had statistically significant difference between two groups (P <0.05),and monitoring group was better than control group;the long-term curative effect had no significant difference between two groups (P >0.05).The incidence of facial paralysis, hearing loss and the incidence of complications such as dizziness had statistically significant differences between two groups (P <0.05),and monitoring group was better than control group.Conclusion LSR monitoring can improve the short-term curative efficiency of facial nerve MVD,but the significance for the long-term curative efficiency is not obvious; BAEP, LSR and FN MEP monitoring have great significance in identification of responsibility vessel,judgement of decompression effect and surface and auditory nerves protection.

Experimental course of pathology is a very important part of pathology teaching.Motivation of students was promoted through improving the professional knowledge of teachers,using teacher-student interacted teaching methods,increasing network courscs,using multimedia in teaching and adding extracurricular practice in our university.In the meantime,it was successful and fruitful to use diversified evaluation systems to assess the comprehensive experimental capacity of students,which can provide experiences in reform of pathological experimental teaching.

Objective To study the effects of the monoclonal anti idiotypic antibody NP30 active immunization on egg granuloma formation and hepatic fibrosis in Schistosoma japonicum infection. Methods ICR mice were actively immunized with NP30 100 ?g ?3 ip. every 10 days while the mice in control group were injected with SP2/0 ascites ip. simultaneously. After cercariae challenging,the mice were killed at the 4th, 8th,12th, 16th, 20th and 24th week, respectively.Mouse livers were removed and stained histochemically with VG and subjected to immunohistochemical assay of collagen type Ⅰ,Ⅲ and fibronectin(FN).The volume of egg granulomas and the content of collagen type Ⅰ,Ⅲ and FN were determined quantitatively by NYD 1000 Image Analysis System. Results The volume of egg granulomas in NP30 immunized group was much smaller than that of control group from the 12th week after cercariae challenge. The cellular components of egg granulomas in NP30 immunized group were significantly different from those of the control group,exhibiting two types of atypical egg granulomas were found.VG stain revealed that the average optical density of collagen in hepatic granulomas of experimental group was lower than that of control group.Immunohistochemical assay revealed that the contents of collagen type Ⅰ,Ⅲ and fibronectin in egg granulomas of experimental group were lower than those of control group. Conclusion NP30 vaccination may induce both cellular and humoral protective immunity to modulate egg granulomas and suppress liver fibrosis of schistosomiasis japonica.

Objective To study the protective effect of Astragalus membrance on mice infected with tachyzoites of Toxoplasma gondii. Methods ICR mice were infected intraperitoneally with 10 5, 10 3, 10 2 tachyzoites of virulent RH strain of Toxoplasma gondii, and the mice were orally treated with Astragalus membrance 0 075 g/d per mouse or Azithromycin [150 mg/(d?kg)] each day starting from day 1 post-infection for 10 days. The survival rate and period were investigated. The parasite loads of livers and lungs of the mice infected with 10 2 tachyzoites were determined by fluorescence PCR methods at 4 day-post-infection (dpi) and 8 dpi. Results When infected with 10 5, 10 3 tachyzoites, treated with Astragalus membrance, the average survived days of the mice were 5 57 days and 6 23 days, and treated with azithromycin were 6 96 days and 8 12 days respectively. The azithromycin group but not the astragli group survived significantly longer than the control(P

Objective To explore the localization and expression of dopaminergic neurons in olfactory bulb of cynomolgus monkeys damaged by 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP).Methods Three adult cynomolgus monkeys were injected with MPTP to induce the damage of dopamine neurons ( MPTP group ) and three adult cynomolgus monkeys were as a control group .Immunohistochemical staining was performed to examine the localization and expression of dopaminergic neurons in the olfactory bulb in normal and MPTP group monkeys .The numbers of DA-positive and DARPP32-positive cells were counted and the average absorbance was measured in normal and MPTP group .Results DA and DARPP32 positive neurons were concentrated in the glomerular layer ( GL) of olfactory bulb.DA positive nerve fibers were distributed in the GL while DARPP 32 positive nerve fibers appeared in all layers , and most nerve fibers were in GL and external plexiform layers (EPL).After MPTP injury, compared with the normal control group , DA and DARPP32 positive neurons and nerve fibers decreased in MPTP group and DA neurons and nerve fibers decreased significantly . Conclusions DA neurons and nerve fibers are in the GL of cynomolgus monkey olfactory bulb .DA neurons and fibers are significantly reduced in the olfactory bulb of cynomolgus monkeys damaged by MPTP , which may be associated with the dysosmia in Parkinson ’ s disease .