Open Access

The goat β‑casein/CMV chimeric promoter drives the expression of hLF in transgenic goats produced by cell transgene microinjection

  • Authors:
    • Ting Zhang
    • Yuguo Yuan
    • Rui Lu
    • Sheng Xu
    • Minya Zhou
    • Tingting Yuan
    • Yaoyao Lu
    • Kunning Yan
    • Yong Cheng
  • View Affiliations

  • Published online on: October 24, 2019     https://doi.org/10.3892/ijmm.2019.4382
  • Pages: 2057-2064
  • Copyright: © Zhang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

There is growing interest in the application of lactoferrin (LF) as a drug or food additive for animals and humans. The objective of this study was to produce transgenic cloned goats that would serve as living bioreactors, expressing high levels of recombinant human LF (rhLF) in their milk. We designed a pCL25 expression vector containing goat β‑casein/CMV chimeric promoter in order to facilitate rhLF expression. This pCL25‑rhLF‑Neo vector was microinjected into goat fetal fibroblasts. G418 selection and PCR analysis were used to identify transgenic donor cells suitable for somatic cell nuclear transfer (SCNT). After SCNT and embryo transplantation, goats harboring the hLF gene were produced, as confirmed via PCR and southern blotting. The average rhLF concentration in milk from this transgenic goat was 3.89 mg/ml as determined via ELISA. We also used an optimized buffer in order to effectively elute high‑purity (95.8%) rhLF from a cation‑exchange column, with the recovered rhLF exhibiting high biological activity. Findings from this study demonstrated that it is possible to generate a transgenic goat harboring the hLF transgene driven by the goat β‑casein/CMV chimeric promoter. It represents an initial step towards the production of rhLF, potentially allowing for industrialized purification in the future.
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December-2019
Volume 44 Issue 6

Print ISSN: 1107-3756
Online ISSN:1791-244X

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Spandidos Publications style
Zhang T, Yuan Y, Lu R, Xu S, Zhou M, Yuan T, Lu Y, Yan K and Cheng Y: The goat β‑casein/CMV chimeric promoter drives the expression of hLF in transgenic goats produced by cell transgene microinjection. Int J Mol Med 44: 2057-2064, 2019.
APA
Zhang, T., Yuan, Y., Lu, R., Xu, S., Zhou, M., Yuan, T. ... Cheng, Y. (2019). The goat β‑casein/CMV chimeric promoter drives the expression of hLF in transgenic goats produced by cell transgene microinjection. International Journal of Molecular Medicine, 44, 2057-2064. https://doi.org/10.3892/ijmm.2019.4382
MLA
Zhang, T., Yuan, Y., Lu, R., Xu, S., Zhou, M., Yuan, T., Lu, Y., Yan, K., Cheng, Y."The goat β‑casein/CMV chimeric promoter drives the expression of hLF in transgenic goats produced by cell transgene microinjection". International Journal of Molecular Medicine 44.6 (2019): 2057-2064.
Chicago
Zhang, T., Yuan, Y., Lu, R., Xu, S., Zhou, M., Yuan, T., Lu, Y., Yan, K., Cheng, Y."The goat β‑casein/CMV chimeric promoter drives the expression of hLF in transgenic goats produced by cell transgene microinjection". International Journal of Molecular Medicine 44, no. 6 (2019): 2057-2064. https://doi.org/10.3892/ijmm.2019.4382