Journal of Plant Biotechnology

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Development of transgenic rice lines expressing the human lactoferrin gene

  • Lee, Jin-Hyoung (National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Il-Gi (Department of Biomedical Science, Hallym University) ;
  • Kim, Hyo-Sung (National Academy of Agricultural Science, Rural Development Administration) ;
  • Shin, Kong-Sik (National Academy of Agricultural Science, Rural Development Administration) ;
  • Suh, Seok-Cheol (National Academy of Agricultural Science, Rural Development Administration) ;
  • Kweon, Soon-Jong (National Academy of Agricultural Science, Rural Development Administration) ;
  • Rhim, Seong-Lyul (Department of Biomedical Science, Hallym University)
  • Received : 2010.11.15
  • Accepted : 2010.11.29
  • Published : 2010.12.31
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Abstract

Lactoferrin is an 80-kDa iron-binding glycoprotein that is found in high concentrations in human milk. Human lactoferrin (hLF) has several beneficial biological activities including immune system modulation and antimicrobial activity. In the present study, we devolved a method of hLF expression through introducing the hLF gene construct into Oriza sativa cv. Nakdong using the Agrobacterium-mediated transformation system. The expression of the hLF gene under the control of the rice glutelin promoter was detected in the seeds of transgenic rice plants. Transformed rice plants were selected on media containing herbicide(DL-phosphinothricin) and the integration of hLF cDNA was confirmed by Southern blot analysis. The expression of the full length hLF protein from the grains of transgenic rice plants was verified by Western blot analysis. The lactoferrin expression levels in the transformed rice grains determined by enzyme-linked immunosorbant assay accounted for approximately 1.5% of total soluble protein. Taken together, these data indicate that rice grains expressing hLF can be directly incorporated into infant formula and baby food.

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References

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