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Background and purpose:Rectal small cell carcinoma is high malignant tumor and prone to early metastasis. It is rare in the clinical and its prognosis is poor. The aim of this article was to analyze clinical characteristics and summarize the diagnosis,treatment and prognosis of rectal small cell carcinoma.Methods:Clinical data of 16 cases with rectal small cell carcinoma conifrmed by pathology from Jan. 2001 to Jan. 2013 in the Tumor Hospital Affiliated to Zhengzhou University Hospital were analyzed retrospectively.Results:Among the 16 rectal small cell carcinoma patients (mean age is 58.5 years), 9 were male, 7 were female; 4 cases in stageⅡ, 7 cases in stageⅢ and 5 cases in stageⅣ. Ten cases underwent surgical treatment, of which 6 cases underwent radical surgery, 4 cases underwent palliative surgery;6 cases received chemotherapy alone, 2 cases received chemoradiotherapy, 2 cases did not receive any treatment postoperatively. Five cases were lost opportunity for operation, of which 3 cases underwent chemotherapy alone and 2 cases underwent chemoradiotherapy. One case did not receive any treatment. Among 10 cases of resection of the lesions, 5 cases had vascular invasion and 7 cases had local lymph node metastasis. All patients received 7-65 months of follow-up. The median survival was 15.4 months. The 6 months, 1 year, 2 years, 3 years and 5 years survival rates were 58.4%, 46.2%, 26.6%, 13.1% and 6.2% respectively. The prognosis of patients was associated with tumor staging, presence of vascular invasion and lymph node metastasis, and type of operation (P0.05).Conclusion:The biologic behavior of rectal small cell carcinoma which is a rare disease and similar to small cell lung cancer, and its prognosis is poor. Treatment methods include surgery, radiotherapy and chemotherapy. The overall result is poor.
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Background and purpose:The recurrence and metastasis of gastric cancer seriously affect survival in patients.SOX gene as a regulatory factor of the classical Wnt pathway, may play an important role in the process. This study was to explore the expression of stem cell marker SOX-2 and β-catenin in gastric cancer and to analyze the relationship with recurrence and metastasis after operation.Methods:Immunohistochemistry was used to detect the expression of SOX-2 and β-catenin in 71 tumor samples from 71 cases after surgery for gastric cancer. The correlation between SOX-2 and β-catenin expression and the clinicopathological characteristics of gastric cancer and disease-free survival was analyzed.Results:The SOX-2 protein expression was associated with metastasis, lymph node inifltration or differentiation (P=0.011,P=0.036,P=0.034) in the 71 gastric cancer, but not with gender, age or T stage. β-catenin expression was correlated with metastasis, lymph node invasion or T stage (P=0.025,P=0.014,P=0.026), but was not related to differentiation, gender or age. The survival analysis showed that SOX-2 and β-catenin expression was closely associated with prognosis of patients, and metastatic rate in positive expression was higher than that in negative expression.Conclusion:The expression of SOX-2 and β-catenin is associated with the development, recurrence, metastasis of gastric cancer and may be used as a useful prognostic parameter to predict overall survival.
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Objective To investigate the correlation between three gene locus polymorphisms of X-ray repair cross-complementary protein 1 (XRCC1) exon (Arg194Trp, Arg280His and Arg399Gln) and the risk of colorectal cancer (CRC). Methods A case-control study was performed in 250 CRC patients (case group, 128 colon cancer patients and 122 rectal cancer patients) and 213 healthy individuals (control group). The three gene locus polymorphism of XRCC1 was tested by polymerase chain reaction and restriction fragment length polymorphism (PCR-RFLP) method. The genotype distribution and allele frequency of each locus was analyzed with SPSS 10.0 software. Results There was no significant difference in allele frequency of XRCC1 at 194 and 399 loci (P > 0.05). However, the 280 Arg/His allele frequency of XRCC1 was higher in case group than that in control group (OR=1.66,95%CI:1.01~2.73,P=0.047). The 280Arg/His allele frequency was higher in rectal cancer group than that in control group (OR =1.82,95%CI:1.02~3.27). The frequency of 280His allele (Arg280His and His280His) was higher in case group than that in control group (OR=1.85,95%CI:1.06~3.22). However, it was a relative low risk factor of colon cancer and there was no significant difference between colon cancer group and control group (OR=1.85, 95%CI:1.06~3.22). Conclusions There was no correlation between XRCC1 Arg194Trp and Arg399Gln polymorpohisms and the risk of CRC. However, 280Arg/His genotype may increase the risk of CRC, and 280His allele is a risk factor of rectal cancer.
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Objective To study the protective effects of fucoidan from Laminaria japonica on CCl_4-induced acute liver injury in mice.Methods Fifty mice were allocated into control group,model group,bifendate group,low and high dosage of fucoidan group randomly.The mice were treat with bifendate(100mg?kg~(-1)) or fucoidan(200,100mg?kg~(-1)) for 10 days. Then 10%CCl_4(10mL?kg~(-1)) was given to mice by intraperitoneal injection.The activities of serum ALT,AST,ALP and BIL were determined,the body weight and liver weight were measured,as well as the pathological changes of the liver were observed in all groups.Results fucoidan(200mg?kg~(-1)) could significantly lower the ALT,AST BIL in serum and the liver index of mice,improve the liver histology.Conclution fucoidan can protect the liver against damage induced by CCl_4 in mice.