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The PET tracer 5-([11C]methyloxy)-L-tryptophan (5-(11)CMTP) was prepared by nucleophilic fluorination and alkylation reaction via a two-step procedure in order to develop specific tumor probe. The biodistribution and microPET imaging of 5-(11)CMTP were executed. The results unveiled that the overall radiochemical yield with no decay correction was (14.6 ±7.2) %, the radiochemical purity was more than 95% and high uptake and long retention time of 5-(11)CMTP in liver, kidney and blood were observed but low uptake in brain and muscle were found, furthermore, high uptake of 5-(11)CMTP in tumor tissue was observed. It seems that 5-(11)CMTP will be a potential amino acid tracer for tumors imaging with PET.
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ObjectiveTo analyze the clinicopathological features and prognosis of gastric cancer patients with metastatic nodules of perigastric soft tissue. MethodsIn this study,1025 cases of gastric cancer received radical resection.According to the metastasis of perigastric soft tissue,patients were divided into metastatic group ( group MP,n =334 ),non-metastatic group ( group NMP,n =691 ).The clinicopathological features and prognosis were compared between the two groups. ResultsIn group MP,the ratio of upper,middle,lower,total gastric cancer was 25.8％,22.0％,51.4％,0.9％ and the ratio in group NMP was 33.2％,21.3％,41.3％,4.2％ respectively,showing significant higher ratio of upper and total gastric cancer in MP group(P =0.000). In group MP 47.3％ cases with tumor size ≥5 cm,significantly higher than that in NMP group(27％ ) (P =0.000).Lymph node metastatic ratio between 21％ -40％ and 41％ -100％ was found in 24.4％ and 37.3％ in MP group respectively,significantly higher than that of 12.9％,10.8％ in NMP group(P =0.000).20.1％ cases had distal metastasis in group MP,significantly higher than that of 4.1％ in group NMP(P=0.000).In group MP and NMP group,the ratio of Borrmann infiltration typing was 82.1％ vs.64.6％,the ratio of positive CEA was 21.2％ vs.11.4％,the ratio of lower or undifferentiation typing was 78.7％ vs.64.2％,all with significant difference (P =0.000 ). COX regression analysis showed the infiltration depth,organic invasion,lymph node metastatic ratio,M staging,Borrmann typing,metastatic nodules was the independent prognostic factors.Prognosis was significantly poorer in the cases with perigastric soft tissues than without ( P =0.000 ).Stratified analysis showed that irrespective of tumor size,infiltration depth,lymph node metastatic ratio,CEA value,Borrmann typing,differentiation degree,the mean survival time was significantly shorter in MP group than that in group NMP(P ＜ 0.005).In cases without distal metastasis,the prognosis was significant poorer in group MP than that in group NMP ( P =0.000 ),however,there was no significant difference between two groups in cases without distal metastasis ( P =0.076).ConclusionsPerigastric soft tissue metastasis was common in gastric cancer,more frequently seen in tumor ≥5 cm,or with organic invasion,lymph nodemetastaticration ≥ 21％, distalmetastasis, Borrmanninfiltrationtyping, loweror undifferentiation typing,positive CEA. Perigastric soft tissues metastasis was the independent prognotic factor for gastric cancer.
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Objective To investigate the expressions of CYCLIND1 CDK4 in pancreatic cancer and their relationship with clinlicopathological parameters.Methods Immunohistochemical detector with new second generational tow steps method was used to detect the expressions of CYCLIND1 CDK4 and PCNA in 48 cases of pancreatic cancer and 14 cases of chronic pancreatitis.Results The expressions of CYCLIND1 CDK4 proteins in pancreatic cancer were 70.85%(34/48)and 62.50%(30/48) respectively.The CYCLIND1 and CDK4 proteins were increased(P
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Objective:To investigate the mechanism for intraperitoneal injection of sapylin to enhance the anti-tumoral immune functions of peritoneal macrophages.Methods:72 cases of patients with early or middle stage gastrointestinal cancer were peritoneally injected saline or sapylin, 48 h or 24 h before operation. The peritoneal macrophages(PM?) was harvested during their operations. The number of the PM? was counted. The phagocytosis, the enzyme activity of LDH and ACP,and the NO secretion were analyzed. Using human gastric cancer cell line MKN1 as target cells, the anti-tumoral cytotoxicity of the PM? was observed.The greater omentum was harvested,both the number and the size of the omental milky spots were measured.Results:I.p. injection of sapylin significantly increased the number, the phagocytosis, the enzyme activities,NO secretion and anti-tumoral cytotoxicity of the PM?, as well as the number and the size of omental milky spots.Conclusion:By activating omental milky spots, intraperitoneal injection of sapylin increased the number and enhanced the immune function of PM?, the activated PM? showed enhancement of anti-tumoral cytotoxicity.