Objective To investigate the adiponectin(ADIPOQ)gene polymorphisms and which association with colorectal cancer(CRC).Methods Genotyping of blood samples were performed for 250 case-control pairs.Taqman real-time PCR was used to test the three single nucleotide polymorphisms(SNPs),namely rs266729,rs2441 766,rs1 501299.Logistic regression was applied to assess the effects of three SNPs,the gene-gene,and gene-environment interactions on CRC risk.Results The ADIPOQ rs266729 GG and CG+GG genotype had a higher CRC risk than those carrying the CC genotype[OR (95%CI ):1.87 (1.01 - 3.47),1.63 (1.14-2.32),respectively].The same results was observed in cases who carried TG+GG genotype vs .TT genotype in rs2441 766 [OR(95%CI ):1.45(1.02-2.06)].The rs1 501299 GT+TT genotype had a lower CRC risk than those carrying the GG genotype [OR(95%CI ):0.61(0.43-0.88)].Furthermore,in two-factor gene-environment interaction analyses,rs266729 presented signifi-cant interactions with Body mass index (BMI),with OR of 1.1 6 (95%CI :1.03-1.30).Conclusion The results suggest that vari-ants in ADIPOQ may contribute to increased colorectal cancer risk and this contribution may be modified by BMI.

Objective To explore the diagnostic value of carcinoembryonic antigen(CEA),adiponectin combined with leptin in colorectal cancer.Methods The case control study was adopted.Forty cases newly diagnosed as colorectal cancer were selected.Forty cases of non-colorectal cancer were selected according to 1 ∶ 1 matching proportion.Serum levels of CEA,adiponectin and leptin were measured in the study subjects.The ROC curve was used to evaluate the diagnostic value of adiponectin combined with leptin for colorectal cancer.Results Serum level of adiponectin in the experimental group was lower than that in the control group,while the CEA and leptin levels were higher than those in the control group,the difference between the two groups was statistically significant(P＜0.05).The area under the curve of adiponectin combined with leptin reached 0.714±-0.058,its specificity and sensitivity were 77.5 ％ and 65.7 ％ respectively.The area under the curve of adiponectin,leptin combined with CEA reached 0.818 ±-0.048,its specificity and sensitivity were 82.5 ％ and 89.5 ％ respectively.The cut-off values of leptin and adiponectin were 11.53 μg/mL and 9.08μg/mL respectively.Conclusion The combined screening of CEA,adiponectin and leptin can significantly improve the detection rate of colorectal cancer.