白细胞腺苷A2A受体基因缺失小鼠模型的建立

目的建立选择性外周血自细胞腺苷A2A受体基因缺失的小鼠模型。方法分别采用一次9．5GyX线照射和2次6．2GyX线间隔照射对小鼠进行清髓处理，将腺苷A2A受体基因敲除的小鼠骨髓细胞移植到清髓性处理的野生型小鼠体内，使其白细胞的腺苷A2A受体选择性缺失，并对移植效果进行鉴定。结果通过基因型鉴定发现骨髓移植6周后受体小鼠的白细胞性染色体基因PCR产物电泳条带为300和330bp；腺苷A2A受体阳性细胞率为10．21％，而野生型小鼠为96．72％；2次分割放疗结合大于6×10。个骨髓细胞的移植量可以得到满意的小鼠存活率（91％）。结论成功地建立了选择性缺失白细胞腺苷A2A受体基因的小鼠模型。

Establishment of a selective inactivation adenosine A2A receptors mice model

OBJECTIVE: To establish a mice model with selective inactivation adenosine A2A receptors (A2ARs) in peripheral white blood cells (PWBC). METHODS: A2ARs were selectively inactivated in PWBCs by transplanting bone marrow cells (BMCs) from A2AR knockout (KO) mice into their wild type (WT) littermates after a single total body irradiation of 9.5 Gy or fractionated total body irradiation of 6.2 Gy x 2. The efficiency of reconstitution of bone marrow-derived cells in chimeric mice was assessed. RESULTS: PCR band patterns changed from the recipient pattern (one band of 330 bp) to the donor (two bands of 300 and 330 bp) pattern. Immunohistochemistry analysis showed that 10.21% of cells were A2AR+ in PWBCs in KO--> WT mice, whereas 96.72% of cells were A2AR+ in WT mice. The survival rates of mice irradiated with 6.2 Gy x 2 and transplanted with more than 6 x 10(6) BMCs were about 91%. CONCLUSION: A murine model of selective inactivation adenosine A2A receptors in PWBCs was established successfully.