Objective The purpose of the study was to study the expression of granulocyte colony-stimulating factor receptor (G-CSFR) in human colorectal cancer (CPC) and the role of granulocyte colony-stimulating factor (G-CSF) in the development and progression of human CRC. Methods Forty-two specimens of CRC and normal colorectal mucosa were harvested from colon or rectum in a group of patients who were suffering from CRC. Immunohistochemistry (IHC) and reverse transcription-polymerase chain reaction (RT-PCR) technique were used to demonstrate expression of granulocyte colony-stimulating factor receptor. The relationship between expression of G-CSFR and clinical or pathological pictures was analyzed. Results Immucohistochemical analyses revealed that G-CSFR was expressed in the human colorectal cancer (25/42, 59.52%), and it appeared to be up-regulated compared with the normal mucosa (14/42, 33.33%, P

Objectives: The research is designed to study the accuracy and characteristics of diagnostic methods for estimating the expansive type of gastric cancer in normal clinical practice, and to evaluate the clinical significance of this estimation. Methods: Preoperative Borrmann classifications of gastric cancer were diagnosed by endoscopies, barium studies and computed tomographies. The results were compared with Borrmann classifications from surgical specimens. Results:The diagnostic accuracy of endoscopy in small gastric cancers was better than that in large gastric cancers. The diagnostic accuracy of CT for type Ⅰ and Ⅳ, which have more obvious gross characteristics, was better, and for type Ⅱ and type Ⅲ, which need to be differentiated by local characteristics such as morphologic appearances of ulcers, was worse. The barium study estimated the expansive type of gastric cancer according to borders of tumors, characteristics of ulcers and whole figure, However, it was difficult to observe detailed changes. Conclusions: To improve the veracity of preoperative diagnosis for the expansive type of gastric cancer requires integrative use of endoscopies, barium studies and computed tomographies. The diagnosis of biological characteristics of gastric cancer reflects its quality, and the diagnosis of aggressive degree reflects its quantity. Only with the diagnosis of these two aspects, can we estimate the clinical pathological process of the gastric cancer completely and comprehensively, so as to select the most reasonable and desirable treatment.

The angiogenesis inhibitor endostatin is a 20 000 C terminal fragment of collagen ⅩⅧ.Endostatin inhibits endothelial cell migration in vitro and appears to be highly effective in murine in vivo studies. Endostatin is a specific and the most effective antiangiogenisis till now. The molecular mechanisms behind the inhibition of angiogenesis have not yet been elucidated.The structure and functional roles in angiogenesis of wllagen ⅩⅧ/endostatin were reviewed.

From March 1980 through April 1983. Models GF-1 XF and CF stapling apparatuses for gastrointestinal anastomosis, all domestically made, were used in 203 patients for 316 anastomoses. The types of operation included gastrojejunal.gastroduodenal.Roux-Y gastrojejunal. colo-rectal.esophagogastric. esophago-esophageal. and esophago-jejunal anastomoses, and closure of gastric and duodenal stumps. The technic and results of using such stapling apparatuses were described in detail. No anastomotic leakage or bleeding occurred with exception of one case. The advantages of the stapling apparatus can be summarized as:(1) The anastomotic stoma made by such apparatus was smoother and tidier than that of conventional suturing method; (2)Some anastomoses,which would be technically impossible with conventional suturing technic, were successfully made with the aid of the stapling apparatus; (3) The stapler shortened the operation time. However, it should be emphasized that the operator should familiarize themself with the construction and the method of operation of the stapler beforehand.

Peroxisomes (microbodies) were studied with CATase, G-6-Pase, TPPase, CMPase cytochemistry and stereology by electron microscopy in 15 cases of normal human liver specimens. In human hepatocytes peroxisomes are ellipsoid or round intracellular bodies. They contain homogeneous fine granular matrix, and surrounded by unit membrane, and distribute randomly in the cytoplasm. By stereological analysis, the peroxisomes accounted for 1.33?0.38% of the cytoplasmic volume, their numerical density in spase was 9.76?1.63/100 ?m~3 cytoplasm, and the ratio of mitochondria to peroxisomes in quantity was 6.22?1.17. The result of G-6-Pase cytochemistry showed no luminal connection between endoplasmic reticulum and peroxisomes. The membrane similar to smooth endoplasmic reticulum seem to be connected with peroxisomes which was G-6-Pase negative, hence such membrane may be peroxisomal membrane system rather than smooth endoplasmic reticulum. The TPPase cytochemistry showed that peroxisomes did not connect with the Golgi complex structurally, and the Golgi complex may not be involved in the biogenesis of peroxisomes. Some figures resembled fission and budding of peroxisomes were viewed, and this finding suggested that new peroxisomes formed probably by division of preexisting peroxisomes.

Objective: To study the influence of preoperative arterial infusion chemotherapy on chemiluminescence(CL) of peripheral blood lymphocyte(Ly) in patients with gastric cancer. Methods: 70 patients with gastric cancer were chosen. Peripheral blood samples were gathered to separate lymphocytes at pre-chemotherapy, 1, 3, 5 and 7 days post-chemotherapy respectively. CL and kinetics of lymphocytes were detected. Results:Ly-CL of gastric cancer patients rapidly decreased at 24 hours post-chemotherapy(P 0.05). At same time proliferation index of lymphocytes changed synchronically and correlated positively to Ly-CL (r=0.61,P

Objectives:To study the relationship between angiogenesis,proliferation and lymph node metastasis in rectal cancer. Methods: Forty six rectal cancer specimens were examined immunohistochemically. The intratumor microvessel density(MVD), vascular endothelial growth factor (VEGF)expression positive rate and Ki 67 label index(Ki 67 LI) were detected and their relationship with tumor invasion and lymph node metastasis were analyzed. Results: The MVD, VEGF expression positive rate and Ki 67 LI increased significantly( P

Objective To explore the effect of preoperative radiotherapy on angiogenesis of rectal cancer. Methods Twenty patients with advanced lower rectal carcinoma received preoperative radiation with a dosage of 30～40 Gy each time for a total of 15～20 sessions during a period of 3～4 weeks. The definitive surgery was performed 7～10 days after radiotherapy. Another 20 patients undergoing tumor resection without preoperative radiotherapy served as control. Tumor sample was sent for pathology. The expression of vascular endothelial growth factor (VEGF) and CD34 in the rectal cancer were detected immunohistochemically. The intratumoral microvessel density (MVD) was measured. Results Fifteen patients were found with grade Ⅱ and five patients with grade Ⅲ tissue response in radiotherapy group. The diameter of intratumoral microvessel was smaller in radiotherapy group than in control group( P

Objectives:To investigate the association and the prognostic significance of the expression of telomerase activity (TA) and apoptosis (APO) in tissues of primary breast cancer.Methods:TRAP-PCR and ELISA were developed to detect the expression of TA,and make quantitative and qualitative analysis respectively.TUNEL was also used to evaluate apoptosis cells in cancer lesions and count apoptosis index (AI).The expression levels of proteins of oncogene Bcl-2 and p53 were measured by means of S-P immunohistochemistry.Results:The mean TA positive expression rate was 89.8%,and its mean optic density was (A) 0.63±0.29,which were significantly higher than those of normal tissues and benign breast lesions (P<0.05).The 5 years survival rate of patients with positive TA expression was lower (60.3%) than those of negative expression (77.4%).There were no relations between TA expression and patients ages,TNM staging,lymph nodes metastasis,size,locations and pathological types of cancer.But TA was positively correlated with APO (r=0.733 1,P<0.05) and the protein expression of oncogene Bcl-2 (r=0.781 4,P<0.05) and negatively correlated with that of p53 (r=-0.625 5,P<0.05).Moreover,in patients receiving preoperative chemotherapy,the levels of TA expression were much lower than those without chemotherapy (64.7% vs 85.1%),and the former had higher AI than the latter (7.19±3.75% vs 3.23±2.04%),intraarterial chemotherapy group were superior significantly to adjuvant group (P<0.05).Multivariate Cox Regression Analysis showed that only TA and AI influenced the survival time of primary breast cancer patients,and patients with higher positive TA expression and AI>4.0% had shorter survival time than those of negative TA expression and AI<4.0% patients.Conclusions:There was a significant correlation between TA and APO and its related oncogene Bcl-2,p53.TA and APO are of great diagnostic values,therapeutic helps and prognostic significance in the formation and the development of primary breast cancer.

Objective To investigate the mechanism of acute lung injury after hepatic ischemia / reperfusion and the protective effect of propofol.Method s Forty-eight male SD rats were randomly divided into Sham2 group,Sham6 group; IR2 group (IR2),IR6 group (IR6); P2 group (P2),P6 group (P6).The 1 mg·kg-1·min-1 propofol was infused from 30min before ischemia in P groups,and the same volume sodium lactate Ringer's solution was infused in Sham and IR groups.The concentration of TNF-α,superoxidedimutase(SOD),malondialdehyde(MDA),myeloperosidase(MPO),lung wet/dry weight ratio and lung histological scores were measured at the points of 2 and 6 hour after reperfusion.Results TNF-α levels were higher in IR and P groups than those in sham groups but the values in P groups were lower than those in IR groups.SOD levels decreased greatly in IR groups,there were great difference between P and IR groups.MDA levels increased greatly in IR groups and reached the peak value at 6 hour after reperfusion.MDA levels in P groups were lower than those in IR groups and there were no difference between P and sham groups.The ratio of Wet/dry levels,MPO and lung histological scores were increased greatly after reperfusion in IR and P groups.But the value in P groups was lower than those in IR groups.Conclusions Acute lung injury after hepatic ischemia / reperfusion is mainly induced by the oxidant stress and neutrophil infiltration in lung tissues.Propofol may have effects of antioxidation and decrease neutrophil infiltration which attenuate lung injury induced by hepatic ischemia/reperfusion.