Cytogenetics ; Humans ; Liver Cirrhosis ; genetics

Objective To determine whether platelet activation is associated with active ulcerative colitis (UC). Methods Platelet aggregability was assessed by means of SH 93 intelligent blood aggregation and coagulation tester; P selectin and thromboxane B 2 (TXB 2) were detected by means of ELISA method in patients with UC as well as in controls, including healthy volunteers and patients with irritable bowel syndrome (IBS). Colonoscopy and biopsy were performed in 43 patients with UC. Results Increased circulating platelet aggregability was detected in active ulcerative colitis compared with IBS and healthy controls ( P

The farnesoid X receptor(FXR)is a member of the nuclear receptor superfamily.It was studied extensively as a receptor for bile acids at first and found to control the metabolism of bile acids.In the past several years,FXR has been found that besides maintaining the homeostasis of bile acids,it also regulates the metabolism of lipid and carbohydrate,protects hepatocytes,promotes hepatic regeneration,inhibits hepatic fibrosis,regulates intestinal bacterial growth,etc.This article reviews the study progression of FXR,especially in the new discovery of FXR functions.

Objective To establish a new Helicobacter pylori(H.pylori) infection model which is more stable and to find the relationship between H. ~pylori infection and gastric carcinogenesis induced by nitrosourea. Methods A total of 94 Balb/c mice were divided into four groups. Two groups of mice were inoculated with H.pylori, among which one group of mice received continuous N-methyl-N-nitrosourea(MNU) administration via the drinking water. The third group were only given MNU, and the forth as control. After 36 weeks, all the mice were ~sacrificed . The infection of H.pylori in gastric mucosa of the mice was analyzed by rapid urease test, ~Giemsa staining and culture. The histopathological changes in the gastric mucosa of mice were assessed in ~H-E stained sections. Results The total infection rate of H.~pylori in Balb/c mice was 93.9%. All the mice in group with H.pylori infection alone had chronic gastritis, in which 20.0% was atrophic gastritis. In the group of mice with H.pylori infection and MNU intake, all had chronic gastritis, and among them 23.1% had atrophic gastritis, 42.3% corpus dysplasia and 57.7% antrum dysplasia. In this group, two mice (7.1%) with low differentiated adenocarcinoma were found. Compared with control group, two groups with H. ~pylori infection only and H. ~pylori plus MNU intake reached statistical difference in the view of inflammatory latitude (P

Purpose To explore the clinical characteristics of small intestinal tumors and its diagnosis. MethodsRetrospective analysis of cases. ResultsLdomyoma was most common among the benign small intestinal tumors(12/17),adenocarcinomawas most common among the malignant small intestinal tumors(45/ 76). The feature of the small intestinal tumors could be hemorrhage, abdominal pain, abdominal mass, fever and jaundice. Upper gastrointestinal tract barium oontrast study was performed in 28 cases,and the results of 21 cases were positive. Mesenteric arteriography was performed in 9 cases. It was confirmed by surgery that the results matched with the lesions. ConclusionsMesenteric arteriography is of great value in diagnosis of the small intestinal tumors endoscope retrograde cholangiopancreatography(ERCP), CT are also helpful.

Objective To evaluate the effect of various rewarming regimes on rectal temperature and hemodynamic parameters of dogs after open abdominal injury and seawater immersion. Method 30 healthy dogs were subjected to open abdominal injury and 2-hour seawater immersion. Then dogs were divided into three groups: group A (n=10) received no special warming treatment, in group B(n=10) electric blanket was used to warm up to 42℃, in group C (n=10) animals were warmed by 1/3 saline solution in 42℃ for 20 minutes and continuous perfusion of the abdominal cavity with 1/2 saline solution for 2 hours. The changes in body temperature, heart rate, MAP, CVP and CO were observed before and after rescue. Results The results of group A were not satisfactory. The rectal temperature, MAP, HR and CO were not recovered to normal after 6 hours of treatment. and the rectal temperature was 34.8℃ after 6 hours. The rectal temperature rose to 36.9℃ after being rewarmed with an electric blanket in group B. The result was better than that of group A. But there was tachycardia. The effects of rewarming from hypothermia in group C was satisfied. All hemodynamic parameters and rectal temperature recovered after 4 hours treatment. Conclusion Cold seawater immersion after open abdominal injury would result to hypothermia, and intra-corporeal rewarming should be the optional treatment.

Objective To evaluate the effect of seawater immersion on hemodynamics and pathological changes in dogs with perforating injury of the intestine. Methods Thirty healthy adult dogs were subjected to perforating injury of the intestine. Ten injured dogs were immersed in artificial seawater after the injury. An equal number of injured dogs were immersed in normal saline solution. Control group dogs (n=10) were not subjected to salt water immersion. Hemodynamical and pathological changes were observed at different time intervals after injury. Results Obvious hemodynamic disorder and serious pathological changes were found after seawater immersion. Normal saline solution group and control group dogs did not show obvious disorders in hemodynamics and pathology. Conclusion Seawater immersion is one of the main factors leading to the disturbance in hemodynamic and pathological changes after perforating injury of the intestine.

Objective To investigate the role of cyclooxygenase 2 (COX 2) in the forming of portal hypertension and whether a selective COX 2 inhibitor can reduce the portal hypertension or not. Methods Cirrhotic Sprague Dawley rat was induced by carbon tetrachloride (CCl 4) intraperitoneally for 8 weeks. The animals were divided into three groups: 10 normal rats served as control group; the other 15 rats, which received CCl 4 intraperitoneally twice a week and rofecoxib (10 mg/kg) by gavages daily, served as treatment group; another 15 rats, which were induced cirrhosis by CCl 4 but given placebo (saline solution ) instead of rofecoxib, served as placebo group. After 8 weeks of CCl 4 induction, portal pressure was measured, and the levels of thromboxane B 2 (TXB 2), and prostaglandin (PG)E 2 in the liver tissues were determined by enzyme immunoassay. Furthermore, liver histopathological analysis was performed in H E and Masson's trichrome staining sections. Results Portal pressure in the rats of rofecoxib group was significantly decreased compared to that in the placebo group [(11.95?1.05) mm Hg vs. (13.45?1.15) mm Hg; P

Objective To investigate the role of cyclooxygenase-2 (COX-2) in sinusoidal capillarization in liver cirrhotic rats. Methods The SD rats were intraperitoneally injected with carbon tetrachloride (CCl4) twice a week for 8 weeks to induce liver cirrhosis. The rats were randomly divided into three groups: normal control group (n= 10), model control group (n= 15) and rofecoxib treated group (received 10 mg/kg of rofecoxib daily, n = 15). Liver histopathology was examined by light microscopy, and sinusoidal ultrastructure was observed by transmission electron microscopy. Furthermore, the level of basement membrane proteins (collagen type Ⅳ, laminin) and their localizations in liver were determined by Western blotting and immunohistochemistry, respectively, and the microvessel density was detected following vWF (yon Willebrand factor) immunolabeling on liver tissue sections. Results Fibrotic areas were reduced in rofecoxib treated group compared with that in model group (30.7±8.9 vs 23.5±6.5,P<0. 05). The light and electron microscopy showed that the pathologic changes including loss or reduction in number of sinusoidal endothelial fenestrate, the accumulation of extracellular matrix in the Disse's space and development of subendothelial basal lamina (basement membrane formation) were more severe in model group than those in rofecoxib treated group. Compared with model group, administration of rofecoxib resulted in significant decrease in microvessel density (11.3 ± 1.6 vs. 6.4 ±0. 7, P<0. 01). Rofecoxib could significantly decrease the expression of type Ⅳ collagen and laminin at protein levels (3.0±0.5 and 3.0±0.5, respectively) when compared with model group (3.8±0.4 and 3.7±0. 5, respectively). Conclusion The results indicate that early administration of rofecoxib may reduce sinusoidal capillarization.

Objective To investigate the relationship between HBV-DNA level during the course and progress tO cirrhosis in patients with chronic hepatitis B.Methods From 2001 to 2007,a total of 239 chronic hepatitis B patients confirmed by liver biopsy were followed up for a median time of 28 months.HBV-DNA level was measured at baseline and end point.Results Those who progressed to cirrhosis were older and with higher HBV-DNA levels at the end point.Kaplan-Meier analysis showed that the higher the HBV-DNA level at end point,the higher the risk to cirrhosis(X2=11.736,P=0.019).There was no difference between patients with and without cirrhosis at baseline of HBV-DNA level(P=0.531).The Cox regression indicated that the independent risk factors of cirrhosis were as followings:HBV-DNA level at the end point,stage of fibrosis,hepatitis B e antigen negative and γ-glutamyl transpeptidase at entry with relative risk ratio of 1.898,1.918,8.976 and 1.006,respectively.Conclusion HBV-DNA level is correlated with progress to cirrhosis in patients with chronic hepatitis B.