Microfold cells or membraneous cells(M cell)are special differentiated cells of follicle associated epithelium(FAE) covered underlining lymphoid follicle,called organ-associated lymphoid tissue(OALT).M cells in the GI transport transcellularly antigens or organism selectively from the gut lumen and trigger the immune reaction.As doorkeepers,they manipulate the function channel of intestinal barrier.The features,and the important role in intestinal barrier of M cells are reviewed.

Objective To explore a suitable mode of prenatal ultrasound diagnosis of fetal malformations with early neonatal surgical treatment. Methods Nine fetus with surgical malformations diagnosed prenatally by ultrasound in our hospital from Mar. 1998 to Dec. 2000 were analysed. Results There were two cases diagnosed in the second trimester, 7 in the third trimester, including 1 duodeneal atresia with annular pancreas, 1 abdominal wall defect, 1 congenital diaphragmatic hernia, 1 huge omphalocele, 1 high imperforate anus, 4 hydronephrosis (2 mild and 2 severe). Six cases were operated in neonatal period, two were treated conservatively, and one did induced abortion. All cases recovered except 1 death. Conclusions The mode of prenatal ultrasound diagnosis with surgery in early neonatal period is a suitable way in China before the fetal surgery is applied. It is important to make effort to increase sensitivity of sonographic diagnosis of fetal malformation and to get early treatment in perinatal period.

Aim To investigate the effects of bradykinin preconditioning on the damage produced by focal cerebral ischemia-reperfusion in rats.Methods Rats were scheduled to undergo middle cerebral artery ischemia-reperfusion by intraluminal suture.Prior to ischemia,bradykinin was pumped into the brain via extra carotid artery and control group was given the same amount of normal saline.The infarct volume、brain water content、permeability of blood brain barrier and histological neuronal changes were evaluated after 2 h ischemia and 24 h reperfusion.Results Compared with other groups, bradykinin preconditioning 15min before ischemia reduced infarct volume、brain edema、permeability of blood brain barrier and histological neuronal damage.Conclusion Bradykinin preconditioning may provide protective effects against cerebral ischemic injury.This protection may be due to the protection of cerebral vasculature and the decrease of infarct volume.

Sports fatigue was pivotal subject in the research of sports science.The effect of nutrition supplement on the elimination of sports fatigue was reviewed.

To study the expression of hypoxia inducible factor-1alpha (HIF-1alpha) protein in prostate cancer (Pca) and its biological significance, the expression of HIF-1alpha was assayed by means of immunohistochemical technique in 42 prostate cancer, 12 prostatic intraepithelial neoplasm (PIN) and 9 normal prostate tissue (NP) specimens. Western blot was used to examine the expression of HIF-1alpha in prostate cancer cell line (PC-3M) induced by different oxygen tension. HIF-1alpha expression was positive in 33 Pca and 9 PIN specimens, and the positive rate of HIF-1alpha was higher in distant metastasis patients than in patients without metastasis of prostate cancer (P<0.05), while there was no expression of HIF-1alpha in NP. The level of HIF-1alpha in PC-3M significantly increased with the decrease of oxygen tension (P<0.01). Overexpression of HIF-1alpha is the preliminary event of the formation of Pca, which may induce carcinoma into malignant phenotype. Thus it may serve as an early diagnosis marker and the novel target for Pca treatment.
Adenocarcinoma/*metabolism ; Cell Line, Tumor ; Hypoxia-Inducible Factor 1, alpha Subunit/*biosynthesis ; Hypoxia-Inducible Factor 1, alpha Subunit/genetics ; Prostatic Neoplasms/*metabolism ; Tumor Markers, Biological/*biosynthesis

Objective To evaluate the guidance value of endoscopic ultrasonography (EUS) and CT scan in preoperative clinical staging for diagnosis and treatment of esophageal cancer .Methods 68 patients with esophageal cancer were randomly divided into EUS group and CT group using a random numbers table(34 cases in each group) .Patients in EUS group were examined by EUS , patients in CT group were examined by CT scan ,and staged according to the TNM (2003) staging system ,and were compared with surgical pathologic findings .Results The accuracy rates of T staging by EUS were 0(0/2) for Tis ,75 .0% (3/4) for T1 ,75 .0% (6/8) for T2 ,86 .7% (13/15) for T3 ,80 .0% (4/5) for T4 ,and the totle accuracy rate was 76 .5% (26/34) for T ;those of N staging were 71 .4% (5/7) for N0 ,75 .0% (9/12) for N1 ,0(0/11) for N2 ,0(0/4) for N3 ,and the totle accuracy rate was 41 .2% (14/34) for N .The accuracy rate of T staging by CT scan were 0(0/1) for Tis ,33 .3% (2/6) for T1 ,28 .6% (2/7) for T2 ,78 .6% (11/14) for T3 ,83 .3% (5/6) for T4 and the totle accuracy rate was 58 .8% (20/34) for T ,the difference was statistically significant com-pared with the EUS group(P<0 .05);those of N staging were 77 .8% (7/9) for N0 ,76 .9% (10/13) for N1 ,66 .7% (4/6) for N2 , 50 .0% (3/6) for N3 and the totle accuracy rate was 70 .6% (24/34) for N ,the difference was statistically significant compared with the EUS group (P<0 .05) .Conclusion The accuracy rate of EUS are higher for diagnosis in esophageal cancer and preoperative T staging .The accuracy rate of CT scan are higher for the preoperative N staging .EUS combined with CT scan has great significance for choosing ideal therapy plan for esophageal cancer ,and for estimating prognosis of esophageal cancer .

Small bowel wall thickening is one of the presentations of small bowel diseases.Conventional diagnostic methods,such as enteroscopy, barium-contrast radiography,X-ray,capsule endoscopy,and ultrasonograhy have disadvantages of low positive rate and high misdiagnosis rate.From December 2009 to December 2011,2672 patients with small bowel wall thickening were admitted to the Southwest Hospital.The location,range,degree,attenuation,enhancement feature and associated perienteric abnormalities of thickened bowel wall were studied. Differential diagnosis of tumorous and non-tumorous small bowel wall thickening,malignant and benign tumorous small bowel wall thickening,and different diseases caused nontumorous small bowel wall thickening were carried out in the study.Etiopathogenesis of small bowel wall thickening can be inferred by computed tomography,and multi-slice computed tomography plays an important role in the differential diagnosis.

BACKGROUND: There are still few effective methods to repair injured myocardium after myocardial failure and pathologically rebuild reverral myocardium. As a new therapy, normal myocytes and therapeutic gene to interfere injured myocardium have advantageous effects in improving heart function.OBJECTIVE: To observe the efficiency and stability of adenovirus-medicated gene transferred into different passages of bone marrow mesenchymal stem cell (MSC) and investigate the effect of MSC-based sarcoplasmic reticulum Ca2+ ATPase gene (SERCA2a) gene therapy for rats with chronic heart failure. To compare the effects of gene therapy, cell transplantation and MSC-based SERCA2a gene therapy for chronic heart failure. DESIGN: Randomized controlled study.SETTING: Department of Senile Angiocardiopathy, General Hospital of Chinese PLA; Department of Biochemistry, Beijing Medical University. MATERIALS: Male Sprague-Dawley (SD) rats with 4 weeks old, clean grade and weighing 45-50 g provided by the Animal Experimental Center, Peking Medical University were used as donators of bone marrow. Other female SD rats of 12 weeks old, clean grade and weighing 200-250 g were used as receptors of cell transplantation and gene therapy. Sry gene of Y chromosome in male rats was used to evaluate whether transplanted cells of donators lived in myocardium of receptor rats. Ad-SERCa2a and Ad-EGFP were constructed by Doctor Lu Xiao-chun; MSC in the 3rd and 8th generations was isolating cultured on its own. METHODS: The experiment was carried out in the Zhou CY Laboratory (BSL-2), Department of Biochemistry, Beijing Medical University from July 2004 to December 2005. Thirty female SD rats received ligation at the left coronary artery to make models with chronic cardiac failure following acute myocardial infarction. And then, 29 rats were randomly divided into four groups, including gene therapy group (n=7), MSC group (n=7), gene-modified MSC group (n=8) and control group (n=7). Rats in the four groups were given the interventions of SERCA2a gene, MSC transplantation, MSC+Ad/SERCa2a and empty adenoviral vector, respectively. MSCs were separated and cultured, and then Ad-SERCA2a-GFP was used to transfer MSC in the 3rd and 8th generations.MAIN OUTCOME MEASURES: Ad-SERCA2a-GFP transfection rate of MSC was measured by using flow cytometer. Before and at 14 and 21 days after treatment, cardiac function was evaluated by ultrasonic echocardiogram. Expression of cytokine Ⅷ was tested by immunohistochemical staining. SERCA2a gene and protein expression were evaluated by RT-PCR and Western blot respectively, as well as SERCA2a enzyme activity. RESULTS: ① Transfection rate: The infection efficiency of adenovirus-medicated gene into different passages of MSC was over 80%, and there was no difference between passage three (P3) MSC and P8 MSC (P > 0.05). ② Heart function: Left ventricle wall was thickened obviously in group MSC and group MSC+Ad/SERCa2a on the 21st day after treatment, while volume was shortened and gradually rounded. Compared to control group, ejection fraction (EF) and shortening fraction (FS) of group Ad-SERCa2a, group MSC and group MSC+Ad/SERCa2a were elevated significantly on the 14th day after therapy (P < 0.01). While the elevation values of EF and FS began to reduce in group Ad-SERCa2a on 14th day after therapy, it continued to increase in both group MSC and group MSC+Ad/SERCa2a (P < 0.01). Improvement rate of EF at 21 days after therapy (EF D21) increased in group MSC and group MSC+Ad/SERCa2a respectively, but decreased in group Ad-SERCa2a. Compared to group Ad-SERCa2a, peak systolic flow velocity of anterior wall and interventricular septum in group MSC+Ad/SERCa2a increased significantly on the 21st day after therapy, and peak diastolic flow velocity of anterior wall and interventricular septum elevated in group MSC+Ad/SERCa2a, too (P < 0.01). ③ SERCA2a gene, protein expression and enzyme activity in group MSC+Ad/SERCa2a were significantly stronger in group MSC and control group. Parts of MSC transplanted into scar zone expressed Ⅷ.CONCLUSION: ① MSC is an effective platform for the targeted delivery of therapeutic gene. It suggests that different passages of MSC from P3 MSC to P8 MSC are regarded as high-effectively gene vehicles. MSC-based SERCA2a gene therapy showed much strong and lasting beneficial effect on exhausted myocardium. ② Effect of MSC transplantation on improving heart function may be related to promoting vascular neogenesis.

Objective To investigate the effects of tripterygium glycosides combined with methotrexate in treatment of rheumatoid arthritis (RA) curative effect and peripheral blood of patients with IL-6, effects of IL-10 and TNF- alpha. Methods 80 patients with RA from February 2014 to August 2016 in our hospital were retrospectively analyzed. According to the different treatment methods by for the observation group, the control group (40 cases). To compare and analyze the curative effect before and after short-term treatment and treatment of patients in the 2 groups were the main clinical symptoms and signs of change and ESR, RF, CRP, IL-6, TNF- alpha, IL-10 index. Results The total effective rate of observation group (92.50％) was significantly higher than the control group (77.50％), the difference was statistically significant (P<0.05), 2 groups of patients before treatment of main clinical symptoms and signs, there was no significant difference, after treatment, clinical symptoms and signs of 2 groups of patients were compared with those before treatment was statistically significant to alleviate the differences (P<0.05), and the observation group of main clinical symptoms and signs were lower than the control group and the remission (down), the difference was statistically significant (P<0.05).Before ESR, the treatment of 2 patients with RF, CRP, TNF- IL-6, alpha, IL-10 index level, no statistical significance, the 2 groups after treatment in patients with ESR, RF, CRP, IL-6, TNF- alpha, IL-10 index level than before treatment with significant difference (P<0.05), and the observation group ESR, RF, CRP, TNF- alpha, IL-6 average index of water compared with the control group decreased significantly, IL-10 index increased significantly than the control group. The difference was statistically significant (P<0.05). Conclusion Tripterygium glycosides combined with methotrexate in treatment of rheumatoid arthritis And it can effectively inhibit the expression of peripheral serum L-6 and TNF- alpha, promote the expression of IL-10 and alleviate the inflammatory reaction

Background and purpose:Risk of invasive cervical carcinoma (ICC) and its precancerous lesions following high risk human papillomavirus (hrHPV) infection may vary according to HPV types and geographic regions. Analyzing HPV-type distribution in cervical samples from local women aged 30 years and older, this study aimed to identify HPV types with higher risk of developing CIN2+, and to compare diagnostic performance for CIN2+using these types and type combinations. Methods:Cervical samples with histology follow-up from patients of a tertiary cancer center in Shanghai were collected for HPV genotyping by PCR-RDB. The risk associations of HPV types with CIN2+were estimated by logistic regression analysis, and ROC curves were plotted for diagnostic performance evaluation. Results:A total number of 413 specimens were obtained, including 38 CIN1, 184 CIN2/3, 126 ICC patients and 65 negative control people. The 4 most common HPV types in CIN2+were HPV16, 58, 33 and 18, in descending order. And only HPV16 (P<0.000 1), 58 (P=0.002), 33 (P=0.015) were signiifcantly associated with CIN2+lesions. Besides, the area under the ROC curve of the HPV16/18/33/58 test scored statistically higher than the HPV16/18 test did (P=0.006 6). Conclusion:A combined test of HPV16/18/33/58 may offer better performance for detecting CIN2+lesions in our geographic region.