title: Generation of the transgenic potato expressing full-length spike protein of infectious bronchitis virus.
abstract: To seek a new delivery system of vaccine for infectious bronchitis virus (IBV), transgenic potato expressing full-length spike (S) protein of IBV was produced and its immunogenicity in chickens was investigated. One to three copies of S gene of IBV were randomly and stably inserted into potato (Solanum tuberrosum cv. Dongnong 303) genome by Agrobacterium tumefaciens-mediated transformation. Transcription and translation of S gene for IBV were confirmed by Northern blot and Western blot analyses in transgenic plantlets. Chickens immunized orally and intramuscularly with transgenic potato tubers expressing S protein generated the detectable levels of serum neutralizing antibodies and were protected against the challenge with the virulent IBV. In vitro secretion of interleukin 2 and T lymphocyte proliferation of spleen cells from the immunized chickens varied with the dose and the manner of vaccination with S protein derived from transgenic plants. The results indicated that S protein expressed in transgenic plants might be a new source for the production of Coronaviridae IBV vaccine.
authors.affiliation: Institute of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310029, China. jyzhou@zju.edu.cn
authors.forename: Ji-Yong
authors.initials: JY
authors.lastname: Zhou
authors.forename: Li-Qin
authors.initials: LQ
authors.lastname: Cheng
authors.forename: Xiao-Juan
authors.initials: XJ
authors.lastname: Zheng
authors.forename: Jian-Xiang
authors.initials: JX
authors.lastname: Wu
authors.forename: Shao-Bin
authors.initials: SB
authors.lastname: Shang
authors.forename: Jin-Yong
authors.initials: JY
authors.lastname: Wang
authors.forename: Ji-Gang
authors.initials: JG
authors.lastname: Chen
mesh_terms: D000818:Animals; D002645:Chickens; D003001:Cloning, Molecular; D001351:Infectious bronchitis virus / Q000235:genetics* / Q000378:metabolism*; D008562:Membrane Glycoproteins / Q000096:biosynthesis* / Q000737:chemistry / Q000235:genetics* / Q000276:immunology*; D030821:Plants, Genetically Modified / Q000378:metabolism; D015202:Protein Engineering / Q000379:methods; D011994:Recombinant Proteins / Q000096:biosynthesis / Q000737:chemistry / Q000276:immunology; D011198:Solanum tuberosum / Q000235:genetics* / Q000378:metabolism*; D064370:Spike Glycoprotein, Coronavirus; D014759:Viral Envelope Proteins / Q000096:biosynthesis* / Q000737:chemistry / Q000235:genetics* / Q000276:immunology*
chemical_list: D008562:Membrane Glycoproteins; D011994:Recombinant Proteins; D064370:Spike Glycoprotein, Coronavirus; D014759:Viral Envelope Proteins; C578557:spike glycoprotein, SARS-CoV; C578553:spike protein, mouse hepatitis virus