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猪IL-22的原核表达及其活性研究

Chinese Journal of Preventive Veterinary Medicine(2016)

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Abstract
为表达猪白细胞介素22 (PoIL-22)并研究其活性,本研究从猪小肠上皮细胞IPEC-J2中扩增出568 bp的PoIL-22编码序列,并以其为模板进一步扩增去除信号肽的PoIL-22 471 bp序列.将该去信号肽基因克隆到原核表达载体pET-30a(+)中,转化至大肠杆菌BL21 (DE3)中诱导表达了重组蛋白PoIL-22 (rPoIL-22),经过Ni-NTA亲和层析纯化.此外,以纯化的rPoIL-22刺激IPEC-J2后,能够上调IPEC-J2表达猪beta防御素2,并表现剂量依赖效应.由此证明本实验中表达的rPoIL-22具有生物学活性.rPoIL-22的制备为进一步研究其在猪粘膜免疫中的作用奠定了基础.
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Key words
porcine IL-22,protein expression,porcine small intestinal epithelia,mucosal immunity
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