中国苏州地区汉族人群MCP-1基因多态性与急性胰腺炎相关性研究

目的探讨中国苏州地区汉族人群单核细胞趋化因子蛋白-1(monocyte chemoattractant protein-1,MCP-1)基因-2518A/G多态性与急性胰腺炎的相关性。方法采用聚合酶链反应-限制性片段长度多态性方法检测中国苏州汉族人群急性胰腺炎(acute pancreatitis,AP)患者101例[其中包括轻症急性胰腺炎(mildAP,MAP)78例,重症急性胰腺炎(servere AP,SAP)23例]和120名健康对照的MCP-1基因-2518位点基因型分布及基因频率,并评价基因多态性与AP易感性之间的相关性。结果对照组MCP-1-2518A/G位点的AA基因型频率较SAP组和MAP组高,差异有统计学意义(P<0.01),携AG及GG基因型者患MAP的风险度约是AA基因型的5.896倍(P<0.01,OR=5.896),患SAP的风险度约为7.011倍(P<0.05,OR=7.011)。而在MAP与SAP组间AA基因型频率差异无统计学意义(P=0.997)。对照组G等位基因频率明显低于MAP(P<0.01,OR=0.318)和SAP组(P<0.01,OR=0.309)。但G等位基因频率在MAP与SAP组间基因型分布差异无统计学意义(P=0.623,OR=1.211)。结论中国苏州地区汉族人群MCP-1-2518位点AA基因型可能有助于保护机体避免发生AP,G等位基因频率较高的人可能易患AP。但AA基因型和G等位基因频率不能预测SAP的发生。

Relationship between genetic polymorphism of MCP-1 and acute pancreatitis in Han population of Suzhou in China

OBJECTIVE: To study the relationship between monocyte chemoattractant protein-1 gene (MCP-1) -2518A/G polymorphism and acute pancreatitis (AP) in the Han population of Suzhou, China. METHODS: The polymorphisms were detected with polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). The genotypes and allele frequencies of MCP-1 -2518A/G were calculated and analyzed in 101 AP patients including 78 mild AP (MAP) patients and 23 severe AP (SAP) patients, and 120 healthy individuals as control group. RESULTS: The frequency of MCP-1 -2518 AA genotype in control group was significantly higher than that in SAP and MAP groups (P < 0.01). People with AG and GG genotypes had 5.896 times risk of developing MAP (P < 0.01, OR=5.896) compared with people with AA genotype. Subjects carrying G allele were at a 7-fold elevated risk for SAP (P < 0.05, OR=7.011) contrasted with subjects carrying AA genotype. However, no difference in AA genotypic distribution was noted between MAP and SAP groups (chi square=0.006, P=0.997). The frequency of G allele in healthy controls was obviously lower than that in MAP (P < 0.01, OR=0.318) and SAP groups (P < 0.01, OR=0.309). No difference of G allele frequency was found between SAP group and MAP group (P=0.623, OR=1.211). CONCLUSION: The MCP-1 -2518 AA genotype of the population in Suzhou may be a protective genotype of AP. People with higher frequency of G allele is more likely to suffer from AP. Nonetheless, the genotype of AA and the frequency of G allele couldn't predict the risk of SAP.