Abstract
Recombinant human epidermal growth factor (EGF) was successfully expressed as a fusion protein in Escherichia coli system. This system was used OmpA signal sequence to produce soluble protein into the periplasm of E. coli. Human EGF (hEGF) synthesized in bacterial cell was found to be similar in size with the original protein and molecular weight approximately at 6.8 kDa. Cell proliferation assay was conducted to characterize the biological activity of hEGF on human dermal fibroblasts. The synthesized hEGF was found to be functional as compared with authentic hEGF in stimulating cell proliferation and promoting growth of cell. In comparison of biological activity between synthesized and commercial hEGF on cell proliferation, the results showed there was no significant different. This finding indicates the synthesized hEGF in E. coli system is fully bioactive in vitro.
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Abbreviations
- hEGF:
-
human epidermal growth factor
- HDF:
-
human dermal fibroblasts
- IPTG:
-
isopropylthiogalactopyranoside
- EDTA:
-
ethylenediaminetetraacetic acid
- LB:
-
Luria Bertani
- TBS:
-
tris buffer saline
- NaCl:
-
sodium chloride
- Tris-HCl:
-
tris-hydrochloride
- MTT:
-
methylthiazolyldiphenyl-tetrazolium bromide
- E. coli :
-
Escherichia coli
- PBS:
-
phosphate buffer saline
- CO2 :
-
carbon dioxide
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Acknowledgements
This research was supported by a grant from the Ministry of Science, Technology and Innovation (MOSTI), Malaysia. Grant. no: 03-02-04-0562- SR0008/05-03.
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Abdull Razis, A.F., Ismail, E.N., Hambali, Z. et al. Expression of Recombinant Human Epidermal Growth Factor in Escherichia coli and Characterization of its Biological Activity. Appl Biochem Biotechnol 144, 249–261 (2008). https://doi.org/10.1007/s12010-007-8019-9
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DOI: https://doi.org/10.1007/s12010-007-8019-9