中国畜牧兽医

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昆明鼠白细胞介素-15基因的克隆与序列分析

李中原1,2, 李佳缘1,2, 周东辉2, 朱兴全2, 陈佳1,2   

  1. 1. 华南农业大学兽医学院,广东广州 510642;
    2. 中国农业科学院兰州兽医研究所家畜疫病病原生物学国家重点实验室, 甘肃省动物寄生虫病重点实验室,甘肃兰州 730046
  • 收稿日期:2012-01-30 出版日期:2012-08-20 发布日期:2012-08-24
  • 通讯作者: 陈佳 E-mail:chenjia_2009@yahoo.cn
  • 作者简介:李中原(1985-),男,安徽人,硕士生,主要从事预防兽医学研究。
  • 基金资助:

    家畜疫病病原生物学国家重点实验室开放基金(SKLVEB2010KFKT009、SKLVEB2011KFKT010、SKLVEB2009KFKT008、SKLVEB2011KFKT004)。

Cloning and Sequence Analysis of IL-15 Gene of Chinese KM Mice

LI Zhong-yuan1,2, LI Jia-yuan1,2, ZHOU Dong-hui2, ZHU Xing-quan2, CHEN Jia1,2   

  1. 1. College of Veterinary Medicine,South China Agricultural University,Guangzhou 510642,China;
    2. Key Laboratory of Veterinary Parasitology of Gansu Province,State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute,Chinese Academy of Agricultural Sciences,Lanzhou 730046,China
  • Received:2012-01-30 Online:2012-08-20 Published:2012-08-24

摘要: 参照GenBank登录的小家鼠(Mus musculus)白细胞介素-15基因序列设计引物,利用RT-PCR技术对刚地弓形虫RH株诱导昆明(KM)鼠72 h后的脾细胞进行扩增,克隆得到了KM鼠的成熟IL-15核苷酸序列。经测序分析发现,KM鼠成熟IL-15序列长度为345 bp,编码114个氨基酸,与小家鼠IL-15序列相似性达到100%。序列比对和遗传进化分析表明,KM鼠成熟IL-15序列与挪威鼠亲缘关系较近,核苷酸和氨基酸序列相似性分别为94.2%和95.5%;与土拨鼠、人、灵长类、兔、犬、猫、牛、野猪等哺乳动物亲缘关系相对较远,核苷酸和氨基酸序列相似性分别为71.2%~78.8%和69.5%~74.7%;与珍珠鸟、非洲蟾蜍和斑马鱼亲缘关系最远,核苷酸和氨基酸序列相似性分别为6.1%~50.9%和16.1%~32.5%。KM鼠IL-15基因的成功克隆为进一步研究其功能及免疫增强作用奠定了基础。

关键词: KM鼠; IL-15; 克隆; 进化分析

Abstract: According to IL-15 gene sequence of Mus musculus available in GenBank database, specific primers were designed and synthesized. Using reverse transcription-polymerase chain reaction (RT-PCR) method, mature IL-15 sequence was amplified from the spleen cells of Kunming (KM) mice stimulated for 72 h by Toxoplasma gondii RH strain, then cloned into pMD18-T vector and transformed into the competent Escherichia coli JM109 for obtaining the positive clone and sequenced. Sequencing analysis revealed that the length of mature IL-15 of KM mice was 345 bp, encoding 114 amino acids. The results of sequence alignment and genetic evolution analysis showed that the KM mice mature IL-15 sequence was the closest to Norvegicus rattus, and the homologies of nucleotide and amino acid sequence were 94.2% and 95.5% respectively. Sequence similarity between the KM mice mature IL-15 sequence and that of Cavia porcellus, human, primates, Oryctolagus cuniculus, dog, cat, Bos taurus, Sus scrofa etc., and the nucleotide homology ranged between 71.2% to 78.8%, and the amino acid homology was 69.5% to 74.7%. The successful cloning of KM mouse IL-15 gene provided foundation for further studies of its functions and immune stimulating effects.

Key words: KM mice; IL-15; cloning; evolution analysis

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