广东汉族人群杀伤免疫球蛋白样受体基因的表达频率

目的检测杀伤免疫球蛋白样受体(KIR)基因在广东汉族人群中的分布。方法对96例广东汉族以SSP法检测其KIR表型，统计不同KIR基因在人群中的表现频率．并与白种人、北印度人、日本人比较。结果不同KIR的表现表率分别为：2DL1(0．85)、2DL2(0．12)、2DL3(0．58)、2DL4(1)、2DL5(0．24)、3DL1(0．96)、3DL2(1)、3DL3(1)、2DP1(0．97)、2DP2(0．98)、2DS1(0．10)、2DS2(0．30)、2DS3(0．02)、2DS4(0．28)、1D(0．65)、2DS5(0．19)、3DS1(0．23)。比较同-HLA配体相应的KIR，抑制性KIR频率均高于活化性KIR。与白种人和北印度人相比，除K1R2DS4外，广东汉族人群的活化性KIR频率均较低。结论不同KIR基因在广东汉族人中有不同的表达频率。与其他人种比较，KIR基因的分布有着明显的种族差异。

Killer immunoglobulin-like receptor gene distribution in Guangdong Han population]

OBJECTIVE: To investigate the distribution of killer immunoglobulin-like receptor (KIR) gene in Guangdong Han population. METHODS: KIR phenotype was examined by PCR with sequence-specific primers in 96 subjects of Han nationality in Guangdong Province of China, and KIR frequency was calculated and compared with those in Caucasian, north Indian and Japanese populations. RESULT: The gene expression frequency of KIR in Guangdong Han people was 2DL1(0.85), 2DL2(0.12), 2DL3(0.58), 2DL4(1), 2DL5(0.24), 3DL1(0.96), 3DL2(1), 3DL3(1), 2DP1(0.97), 2DP2(0.98), 2DS1(0.10), 2DS2(0.30), 2DS3(0.02), 2DS4(0.28), 1D(0.65), 2DS5(0.19), and 3DS1(0.23) respectively. Comparison of the KIR recognizing the same HLA ligand suggested significantly higher expression frequency of inhibitory KIR than that of activating KIR. Compared with Caucasian and north Indian populations, Guangdong Han population had significantly lower expression frequency of activating KIR gene with the exception of KIR2DS4. CONCLUSION: Different KIR genes have different expression frequencies in Guangdong Han population, and KIR gene distribution varies between populations of different races.